Document and Entity Information
| Document and Entity Information - USD ($) $ in Millions | 12 Months Ended | ||
| Dec. 31, 2022 | Feb. 28, 2023 | Jun. 30, 2022 | |
| Document and Entity Information [Abstract] | |||
| Document Type | 10-K | ||
| Document Annual Report | true | ||
| Document Transition Report | false | ||
| Document Period End Date | Dec. 31, 2022 | ||
| Document Fiscal Year Focus | 2022 | ||
| Current Fiscal Year End Date | --12-31 | ||
| Entity File Number | 814-00967 | ||
| Entity Registrant Name | WHITEHORSE FINANCE, INC. | ||
| Entity Incorporation, State or Country Code | DE | ||
| Entity Tax Identification Number | 45-4247759 | ||
| Entity Address State Or Province | FL | ||
| Entity Address, Address Line One | 1450 Brickell Avenue, 31st Floor | ||
| Entity Address, City or Town | Miami | ||
| Entity Address, Postal Zip Code | 33131 | ||
| City Area Code | 305 | ||
| Local Phone Number | 381-6999 | ||
| Title of 12(b) Security | Common Stock, par value $0.001 per share | ||
| Trading Symbol | WHF | ||
| Security Exchange Name | NASDAQ | ||
| Entity Well-known Seasoned Issuer | No | ||
| Entity Voluntary Filers | No | ||
| Entity Current Reporting Status | Yes | ||
| Entity Interactive Data Current | Yes | ||
| Entity Filer Category | Non-accelerated Filer | ||
| Entity Small Business | false | ||
| Entity Emerging Growth Company | false | ||
| ICFR Auditor Attestation Flag | false | ||
| Entity Shell Company | false | ||
| Entity Public Float | $ 224.2 | ||
| Entity Common Stock, Shares Outstanding | 23,243,088 | ||
| Entity Central Index Key | 0001552198 | ||
| Document Fiscal Period Focus | FY | ||
| Amendment Flag | false | ||
| Auditor Name | Crowe LLP | ||
| Auditor Location | California | ||
| Auditor Firm ID | 173 |
Consolidated Statements of Asse
| Consolidated Statements of Assets and Liabilities - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 |
| Assets | ||
| Investments, at fair value | $ 760,228 | $ 819,208 |
| Cash and cash equivalents | 9,508 | 12,185 |
| Restricted cash and cash equivalents | 14,683 | 9,814 |
| Restricted foreign currency (cost of $2,066 and $464, respectively) | 2,073 | 469 |
| Interest and dividend receivable | 7,814 | 7,521 |
| Amounts receivable on unsettled investment transactions | 283 | |
| Escrow receivable | 711 | 515 |
| Prepaid expenses and other receivables | 1,174 | 1,307 |
| Total assets | 796,474 | 851,019 |
| Liabilities | ||
| Debt (net of unamortized debt issuance costs of $4,718 and $5,679, respectively) | 440,427 | 475,958 |
| Distributions payable | 8,251 | 8,222 |
| Management fees payable | 3,860 | 3,766 |
| Incentive fees payable | 5,618 | 7,958 |
| Interest payable | 2,774 | 2,087 |
| Accounts payable and accrued expenses | 2,329 | 2,438 |
| Advances received from unfunded credit facilities | 825 | 839 |
| Unrealized depreciation on foreign currency forward contracts | 3 | |
| Total liabilities | 464,087 | 501,268 |
| Commitments and contingencies (See Note 8) | ||
| Net assets | ||
| Common stock, 23,243,088 and 23,162,667 shares issued and outstanding, par value $0.001 per share, respectively, and 100,000,000 shares authorized | 23 | 23 |
| Paid-in capital in excess of par | 339,240 | 339,161 |
| Accumulated earnings (losses) | (6,876) | 10,567 |
| Total net assets | 332,387 | 349,751 |
| Total liabilities and total net assets | $ 796,474 | $ 851,019 |
| Number of shares outstanding | 23,243,088 | 23,162,667 |
| Net asset value per share | $ 14.30 | $ 15.10 |
| Non-controlled/non-affiliate company investments | ||
| Assets | ||
| Investments, at fair value | $ 650,535 | $ 736,727 |
| Non-controlled affiliate company investments | ||
| Assets | ||
| Investments, at fair value | 9,533 | 6,874 |
| Controlled affiliate company investments | ||
| Assets | ||
| Investments, at fair value | $ 100,160 | $ 75,607 |
Consolidated Statements of As_2
| Consolidated Statements of Assets and Liabilities (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended | |
| Dec. 31, 2022 | Dec. 31, 2021 | |
| Consolidated Statements of Assets and Liabilities | ||
| Investments, amortized cost | $ 782,429 | $ 831,960 |
| Restricted foreign currency, cost | 2,066 | 464 |
| Unamortized debt issuance costs | $ 4,718 | $ 5,679 |
| Common Stock, Par or Stated Value Per Share | $ 0.001 | $ 0.001 |
| Common Stock, Shares Authorized | 100,000,000 | 100,000,000 |
| Common Stock, Shares, Issued | 23,243,088 | 23,162,667 |
| Common Stock, Shares, Outstanding | 23,243,088 | 23,162,667 |
Consolidated Statements of Oper
| Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands | 12 Months Ended | ||
| Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | |
| Investment income | |||
| Total investment income | $ 87,527 | $ 72,143 | $ 61,699 |
| Expenses | |||
| Interest expense | 21,940 | 16,594 | 13,125 |
| Base management fees | 15,600 | 13,975 | 12,464 |
| Performance-based incentive fees | 7,059 | 7,524 | 7,619 |
| Administrative service fees | 683 | 683 | 683 |
| General and administrative expenses | 3,963 | 3,572 | 2,909 |
| Total expenses | 49,245 | 42,348 | 36,800 |
| Net investment income before excise tax | 38,282 | 29,795 | 24,899 |
| Excise tax | 1,024 | 1,004 | 742 |
| Net investment income after excise tax | 37,258 | 28,791 | 24,157 |
| Realized and unrealized gains (losses) on investments and foreign currency transactions | |||
| Net realized gains (losses) | (13,958) | 8,556 | 4,118 |
| Foreign currency transactions | (310) | 262 | 70 |
| Foreign currency forward contracts | (3) | (25) | |
| Net realized gains (losses) | (14,268) | 8,815 | 4,163 |
| Net change in unrealized appreciation (depreciation) | (9,191) | (7,606) | 3,343 |
| Translation of assets and liabilities in foreign currencies | 1,887 | 94 | 22 |
| Foreign currency forward contracts | (3) | ||
| Net change in unrealized appreciation (depreciation) | (7,307) | (7,512) | 3,365 |
| Net realized and unrealized gains (losses) on investments and foreign currency transactions | (21,575) | 1,303 | 7,528 |
| Net increase in net assets resulting from operations | $ 15,683 | $ 30,094 | $ 31,685 |
| Per Common Share Data | |||
| Basic earnings per common share | $ 0.68 | $ 1.42 | $ 1.55 |
| Diluted earnings per common share | 0.68 | 1.42 | 1.55 |
| Dividends and distributions declared per common share | $ 1.47 | $ 1.56 | $ 1.55 |
| Basic weighted average common shares outstanding | 23,229,552 | 21,150,168 | 20,546,032 |
| Diluted weighted average common shares outstanding | 23,229,552 | 21,150,168 | 20,546,032 |
| Non-controlled/non-affiliate company investments | |||
| Investment income | |||
| Interest income | $ 69,731 | $ 59,845 | $ 54,039 |
| Fee income | 3,474 | 2,621 | 1,988 |
| Dividend income | 300 | 273 | 133 |
| Realized and unrealized gains (losses) on investments and foreign currency transactions | |||
| Net realized gains (losses) | (15,683) | 7,994 | 4,118 |
| Net change in unrealized appreciation (depreciation) | (3,505) | (9,501) | 4,685 |
| Non-controlled affiliate company investments | |||
| Investment income | |||
| Interest income | 339 | ||
| Dividend income | 321 | 1,190 | 1,183 |
| Realized and unrealized gains (losses) on investments and foreign currency transactions | |||
| Net realized gains (losses) | 1,725 | 562 | |
| Net change in unrealized appreciation (depreciation) | (5,239) | 1,187 | (878) |
| Controlled affiliate company investments | |||
| Investment income | |||
| Interest income | 6,385 | 3,307 | 2,595 |
| Dividend income | 6,977 | 4,907 | 1,761 |
| Realized and unrealized gains (losses) on investments and foreign currency transactions | |||
| Net change in unrealized appreciation (depreciation) | $ (447) | $ 708 | $ (464) |
Consolidated Statements of Chan
| Consolidated Statements of Changes in Net Assets - USD ($) $ in Thousands | 12 Months Ended | |||
| Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | |
| Increase (Decrease) in Stockholders' Equity | ||||
| Beginning Balance | $ 349,751 | $ 312,897 | $ 312,955 | |
| Beginning Balance (in shares) | 23,162,667 | |||
| Stock issued in connection with offering (in shares) | 80,421 | 2,616,635 | ||
| Stock issued in connection with dividend reinvestment plan | $ 978 | $ 2,680 | ||
| Net increase in net assets resulting from operations: | ||||
| Net investment income after excise tax | 37,258 | 28,791 | $ 24,157 | |
| Net realized gains (losses) on investments | (14,268) | 8,815 | 4,163 | |
| Net change in unrealized appreciation (depreciation) on investments | (7,307) | (7,512) | 3,365 | |
| Distributions declared | (34,150) | (33,405) | (31,743) | (31,743) |
| Ending Balance | $ 332,387 | $ 349,751 | 312,897 | 312,955 |
| Ending Balance (in shares) | 23,243,088 | 23,162,667 | ||
| Public offering | ||||
| Increase (Decrease) in Stockholders' Equity | ||||
| Stock issued in connection with offering | $ 33,580 | |||
| At-the-market offering | ||||
| Increase (Decrease) in Stockholders' Equity | ||||
| Stock issued in connection with offering | $ 125 | $ 3,905 | ||
| Stock issued in connection with offering (in shares) | 16,678 | 259,682 | ||
| Common Stock | ||||
| Increase (Decrease) in Stockholders' Equity | ||||
| Beginning Balance | $ 23 | $ 21 | $ 21 | |
| Beginning Balance (in shares) | 23,162,667 | 20,546,032 | 20,546,032 | |
| Stock issued in connection with dividend reinvestment plan (in shares) | 63,743 | 174,653 | ||
| Net increase in net assets resulting from operations: | ||||
| Ending Balance | $ 23 | $ 23 | $ 21 | $ 21 |
| Ending Balance (in shares) | 23,243,088 | 23,162,667 | 20,546,032 | 20,546,032 |
| Common Stock | Public offering | ||||
| Increase (Decrease) in Stockholders' Equity | ||||
| Stock issued in connection with offering | $ 2 | |||
| Stock issued in connection with offering (in shares) | 2,182,300 | |||
| Common Stock | At-the-market offering | ||||
| Increase (Decrease) in Stockholders' Equity | ||||
| Stock issued in connection with offering (in shares) | 16,678 | 259,682 | ||
| Paid-in Capital in Excess of Par | ||||
| Increase (Decrease) in Stockholders' Equity | ||||
| Beginning Balance | $ 339,161 | $ 300,002 | $ 300,744 | |
| Stock issued in connection with dividend reinvestment plan | 978 | 2,680 | ||
| Net increase in net assets resulting from operations: | ||||
| Tax reclassification of stockholders' equity | (1,024) | (1,004) | (742) | |
| Ending Balance | 339,240 | 339,161 | 300,002 | $ 300,744 |
| Paid-in Capital in Excess of Par | Public offering | ||||
| Increase (Decrease) in Stockholders' Equity | ||||
| Stock issued in connection with offering | 33,578 | |||
| Paid-in Capital in Excess of Par | At-the-market offering | ||||
| Increase (Decrease) in Stockholders' Equity | ||||
| Stock issued in connection with offering | 125 | 3,905 | ||
| Accumulated Earnings (Loss) | ||||
| Increase (Decrease) in Stockholders' Equity | ||||
| Beginning Balance | 10,567 | 12,874 | 12,190 | |
| Net increase in net assets resulting from operations: | ||||
| Net investment income after excise tax | 37,258 | 28,791 | 24,157 | |
| Net realized gains (losses) on investments | (14,268) | 8,815 | 4,163 | |
| Net change in unrealized appreciation (depreciation) on investments | (7,307) | (7,512) | 3,365 | |
| Distributions declared | (34,150) | (33,405) | (31,743) | |
| Tax reclassification of stockholders' equity | 1,024 | 1,004 | 742 | |
| Ending Balance | $ (6,876) | $ 10,567 | $ 12,874 | $ 12,190 |
Consolidated Statements of Cash
| Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 12 Months Ended | ||
| Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | |
| Cash flows from operating activities | |||
| Net increase in net assets resulting from operations | $ 15,683 | $ 30,094 | $ 31,685 |
| Adjustments to reconcile net increase in net assets resulting from operations to net cash (used in) operating activities: | |||
| Paid-in-kind income | (2,355) | (1,164) | (1,210) |
| Net realized (gains) losses on investments | 13,958 | (8,556) | (4,118) |
| Net unrealized depreciation (appreciation) on investments | 9,191 | 7,606 | (3,343) |
| Net unrealized (appreciation) depreciation on translation of assets and liabilities in foreign currencies | (1,887) | (94) | (22) |
| Net unrealized (appreciation) depreciation on foreign currency forward contracts | 3 | ||
| Accretion of discount | (5,626) | (6,821) | (3,434) |
| Amortization of deferred financing costs | 1,541 | 2,146 | 1,055 |
| Acquisition of investments | (280,089) | (544,165) | (302,729) |
| Proceeds from principal payments and sales of portfolio investments | 239,622 | 306,387 | 133,419 |
| Proceeds from sales of portfolio investments to STRS JV | 83,459 | 117,246 | 80,369 |
| Net changes in operating assets and liabilities: | |||
| Interest and dividend receivable | (293) | (989) | (522) |
| Escrow receivable | 619 | 480 | |
| Prepaid expenses and other receivables | 133 | (246) | 6,560 |
| Amounts receivable on unsettled investment transactions | (283) | 4,717 | (4,357) |
| Amounts payable on unsettled investment transactions | (497) | 497 | |
| Management fees payable | 94 | 412 | 294 |
| Incentive fees payable | (2,340) | 1,841 | 887 |
| Accounts payable and accrued expenses | (109) | 726 | (52) |
| Interest payable | 687 | 217 | 196 |
| Advances received from unfunded credit facilities | (14) | 467 | 229 |
| Net cash provided by operating activities | 71,994 | (90,193) | (64,596) |
| Cash flows from financing activities | |||
| Proceeds from notes issued | 100,000 | 60,000 | |
| Proceeds from issuance of common stock, net of offering costs | 125 | 37,486 | |
| Borrowings | 140,527 | 357,795 | 236,045 |
| Repayments of debt | (175,417) | (366,011) | (209,895) |
| Deferred financing costs | (580) | (2,459) | (1,427) |
| Distributions paid to common stockholders, net of distributions reinvested | (33,143) | (29,797) | (31,743) |
| Net cash used in financing activities | (68,488) | 97,014 | 52,980 |
| Effect of exchange rate changes on cash | 290 | (297) | 14 |
| Net change in cash, cash equivalents and restricted cash | 3,796 | 6,524 | (11,602) |
| Cash, cash equivalents and restricted cash at beginning of period | 22,468 | 15,944 | 27,546 |
| Cash, cash equivalents and restricted cash at end of period | 26,264 | 22,468 | 15,944 |
| Supplemental and non-cash disclosure of cash flow information: | |||
| Interest paid | 19,712 | 14,232 | 11,888 |
| Taxes, including excise tax, paid during the year | 1,184 | 910 | 833 |
| Distributions declared | 34,150 | 33,405 | 31,743 |
| Distributions reinvested | 978 | 2,680 | |
| Non-cash exchanges of investments | $ 25,000 | $ 23,658 | $ 28,103 |
Consolidated Statements of Ca_2
| Consolidated Statements of Cash Flows - Total cash, cash equivalents and restricted cash - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 |
| Reconciliation of cash, cash equivalents | |||
| Cash and cash equivalents | $ 9,508 | $ 12,185 | $ 8,062 |
| Restricted cash and cash equivalents | 14,683 | 9,814 | 7,549 |
| Restricted foreign currency | 2,073 | 469 | 333 |
| Total cash, cash equivalents and restricted cash presented in consolidated statements of cash flows | $ 26,264 | $ 22,468 | $ 15,944 |
Consolidated Schedule of Invest
| Consolidated Schedule of Investments € in Thousands, £ in Thousands, $ in Thousands, $ in Thousands | 12 Months Ended | ||||||||
| Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2022 CAD ($) | Dec. 31, 2022 EUR (€) | Dec. 31, 2022 GBP (£) | Dec. 31, 2021 CAD ($) | Dec. 31, 2021 EUR (€) | Dec. 31, 2021 GBP (£) | Dec. 31, 2020 USD ($) | |
| Schedule of Investments [Line Items] | |||||||||
| PIK interest rate | 12.17% | 12.17% | 12.17% | 12.17% | |||||
| Investments, amortized cost | $ 782,429 | $ 831,960 | |||||||
| Investments, at fair value | $ 760,228 | $ 819,208 | |||||||
| Percent of net assets | 228.75% | 234.24% | 228.75% | 228.75% | 228.75% | 234.24% | 234.24% | 234.24% | |
| Qualifying Assets Required Of Acquiree At Time Of Acquisition Of Total Assets | 70% | 70% | |||||||
| Qualifying Assets Of Acquired Of Total Assets | 82.80% | 88.20% | |||||||
| Investments Of Net Assets | 228.75% | 234.20% | |||||||
| Investment Of Total Assets | 95.40% | 96.30% | |||||||
| Additional interest for senior term debt | 2.75% | ||||||||
| Additional interest for senior term debt | 3% | 3.50% | |||||||
| Additional interest for senior term debt | 3% | ||||||||
| Interest Issuer May Pay In Cash Or Cash And PIK. | 2% | ||||||||
| Interest Investment Earns When Converted On Annual Basis | 14% | ||||||||
| One-month LIBOR | 0.10% | ||||||||
| Three-month LIBOR | 0.21% | ||||||||
| Six-month LIBOR | 0.34% | ||||||||
| SOFR | 0.05% | ||||||||
| CDOR | 0.52% | ||||||||
| Canadian prime | 2.45% | ||||||||
| Prime | 3.25% | ||||||||
| Unrealized depreciation | $ (3) | ||||||||
| Morgan Stanley | CAD | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Currency to be sold | 327 | ||||||||
| Morgan Stanley | USD | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Currency to be purchased | 241 | ||||||||
| Morgan Stanley One [Member] | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Unrealized depreciation | $ (3) | ||||||||
| Morgan Stanley One [Member] | GBP | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Currency to be sold | 59 | ||||||||
| Morgan Stanley One [Member] | USD | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Currency to be purchased | 69 | ||||||||
| Advertising | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 11,760 | ||||||||
| Investments, at fair value | $ 11,703 | ||||||||
| Air Freight & Logistics | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 3,523 | ||||||||
| Investments, at fair value | $ 3,545 | ||||||||
| Application Software | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 13,162 | $ 13,247 | |||||||
| Investments, at fair value | $ 13,375 | $ 13,518 | |||||||
| Building Products | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 14,105 | $ 16,441 | |||||||
| Investments, at fair value | $ 14,132 | $ 16,603 | |||||||
| Construction & Engineering | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 8,522 | $ 13,626 | |||||||
| Investments, at fair value | $ 8,432 | $ 13,975 | |||||||
| Data Processing & Outsourced Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 15,413 | $ 15,766 | |||||||
| Investments, at fair value | $ 14,536 | $ 16,160 | |||||||
| Diversified Support Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 12,192 | $ 12,773 | |||||||
| Investments, at fair value | $ 11,729 | $ 10,489 | |||||||
| Education Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 13,028 | ||||||||
| Investments, at fair value | $ 12,786 | ||||||||
| Percent of net assets | 3.83% | 3.83% | 3.83% | 3.83% | |||||
| Electronic Equipment & Instruments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 13,284 | $ 6,680 | |||||||
| Investments, at fair value | $ 13,187 | $ 6,687 | |||||||
| Environmental & Facilities Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 20,725 | $ 6,780 | |||||||
| Investments, at fair value | $ 20,708 | $ 6,872 | |||||||
| Household Appliances | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 7,859 | ||||||||
| Investments, at fair value | $ 7,885 | ||||||||
| Industrial Machinery | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 15,145 | $ 6,727 | |||||||
| Investments, at fair value | $ 14,999 | $ 6,815 | |||||||
| Internet & Direct Marketing Retail | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 18,920 | $ 15,153 | |||||||
| Investments, at fair value | $ 19,113 | $ 15,353 | |||||||
| Investment Banking & Brokerage | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 5,507 | $ 9,943 | |||||||
| Investments, at fair value | $ 5,545 | $ 10,054 | |||||||
| IT Consulting And Other Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 34,184 | $ 40,384 | |||||||
| Investments, at fair value | $ 33,461 | $ 40,697 | |||||||
| Leisure Products | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 8,931 | ||||||||
| Investments, at fair value | $ 8,930 | ||||||||
| Packaged Foods & Meats | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 12,312 | $ 26,802 | |||||||
| Investments, at fair value | $ 12,069 | $ 25,606 | |||||||
| Personal Products | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 3,895 | $ 4,185 | |||||||
| Investments, at fair value | $ 3,949 | $ 4,273 | |||||||
| Paper Packaging | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 8,085 | ||||||||
| Investments, at fair value | $ 8,059 | ||||||||
| Real Estate Operating Companies | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 11,246 | $ 4,781 | |||||||
| Investments, at fair value | $ 11,121 | $ 4,780 | |||||||
| Research & Consulting Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 8,782 | $ 8,852 | |||||||
| Investments, at fair value | $ 8,686 | $ 8,901 | |||||||
| Specialized Finance | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 80,000 | ||||||||
| Investments, at fair value | $ 80,000 | ||||||||
| Percent of net assets | 24.07% | 24.07% | 24.07% | 24.07% | |||||
| Systems Software | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 9,801 | ||||||||
| Investments, at fair value | $ 9,898 | ||||||||
| Technology Hardware, Storage & Peripherals | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 14,874 | $ 14,694 | |||||||
| Investments, at fair value | $ 14,884 | $ 14,725 | |||||||
| Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 735,943 | $ 794,969 | |||||||
| Investments, at fair value | $ 719,068 | $ 781,049 | |||||||
| Percent of net assets | 216.34% | 223.32% | 216.34% | 216.34% | 216.34% | 223.32% | 223.32% | 223.32% | |
| Debt Investments | Advertising | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 9,490 | ||||||||
| Investments, at fair value | $ 9,488 | ||||||||
| Percent of net assets | 2.71% | 2.71% | 2.71% | 2.71% | |||||
| Debt Investments | Air Freight & Logistics | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 15,819 | $ 20,021 | |||||||
| Investments, at fair value | $ 15,590 | $ 20,129 | |||||||
| Percent of net assets | 4.69% | 5.75% | 4.69% | 4.69% | 4.69% | 5.75% | 5.75% | 5.75% | |
| Debt Investments | Alternative Carriers | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 12,105 | ||||||||
| Investments, at fair value | $ 12,068 | ||||||||
| Percent of net assets | 3.63% | 3.63% | 3.63% | 3.63% | |||||
| Debt Investments | Application Software | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 29,947 | $ 22,460 | |||||||
| Investments, at fair value | $ 27,117 | $ 22,590 | |||||||
| Percent of net assets | 8.14% | 6.46% | 8.14% | 8.14% | 8.14% | 6.46% | 6.46% | 6.46% | |
| Debt Investments | Asset Management & Custody Banks | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 10,118 | ||||||||
| Investments, at fair value | $ 10,144 | ||||||||
| Percent of net assets | 3.05% | 3.05% | 3.05% | 3.05% | |||||
| Debt Investments | Automotive Retail | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 14,311 | $ 15,193 | |||||||
| Investments, at fair value | $ 14,363 | $ 15,286 | |||||||
| Percent of net assets | 4.32% | 4.37% | 4.32% | 4.32% | 4.32% | 4.37% | 4.37% | 4.37% | |
| Debt Investments | Broadcasting | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 7,908 | $ 8,027 | |||||||
| Investments, at fair value | $ 7,780 | $ 8,027 | |||||||
| Percent of net assets | 2.34% | 2.30% | 2.34% | 2.34% | 2.34% | 2.30% | 2.30% | 2.30% | |
| Debt Investments | Building Products | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 25,182 | $ 43,653 | |||||||
| Investments, at fair value | $ 23,576 | $ 43,757 | |||||||
| Percent of net assets | 7.09% | 12.51% | 7.09% | 7.09% | 7.09% | 12.51% | 12.51% | 12.51% | |
| Debt Investments | Cable & Satellite | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 21,089 | $ 14,936 | |||||||
| Investments, at fair value | $ 20,489 | $ 14,526 | |||||||
| Percent of net assets | 6.16% | 4.15% | 6.16% | 6.16% | 6.16% | 4.15% | 4.15% | 4.15% | |
| Debt Investments | Commodity Chemicals | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 20,345 | $ 15,047 | |||||||
| Investments, at fair value | $ 20,410 | $ 15,172 | |||||||
| Percent of net assets | 6.14% | 4.34% | 6.14% | 6.14% | 6.14% | 4.34% | 4.34% | 4.34% | |
| Debt Investments | Construction & Engineering | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 10,814 | ||||||||
| Investments, at fair value | $ 11,086 | ||||||||
| Percent of net assets | 3.17% | 3.17% | 3.17% | 3.17% | |||||
| Debt Investments | Construction Materials | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 7,766 | $ 7,725 | |||||||
| Investments, at fair value | $ 7,459 | $ 7,673 | |||||||
| Percent of net assets | 2.23% | 2.20% | 2.23% | 2.23% | 2.23% | 2.20% | 2.20% | 2.20% | |
| Debt Investments | Consumer Finance | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 9,455 | ||||||||
| Investments, at fair value | $ 9,628 | ||||||||
| Percent of net assets | 2.76% | 2.76% | 2.76% | 2.76% | |||||
| Debt Investments | Data Processing & Outsourced Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 22,776 | $ 31,301 | |||||||
| Investments, at fair value | $ 22,817 | $ 31,971 | |||||||
| Percent of net assets | 6.86% | 9.14% | 6.86% | 6.86% | 6.86% | 9.14% | 9.14% | 9.14% | |
| Debt Investments | Department Stores | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 13,331 | ||||||||
| Investments, at fair value | $ 13,538 | ||||||||
| Percent of net assets | 3.87% | 3.87% | 3.87% | 3.87% | |||||
| Debt Investments | Distributors | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 5,465 | $ 4,949 | |||||||
| Investments, at fair value | $ 4,171 | $ 4,025 | |||||||
| Percent of net assets | 1.26% | 1.15% | 1.26% | 1.26% | 1.26% | 1.15% | 1.15% | 1.15% | |
| Debt Investments | Diversified Chemicals | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 14,880 | $ 18,643 | |||||||
| Investments, at fair value | $ 13,268 | $ 18,360 | |||||||
| Percent of net assets | 4% | 5.25% | 4% | 4% | 4% | 5.25% | 5.25% | 5.25% | |
| Debt Investments | Diversified Support Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 11,199 | $ 11,459 | |||||||
| Investments, at fair value | $ 10,833 | $ 11,460 | |||||||
| Percent of net assets | 3.26% | 3.28% | 3.26% | 3.26% | 3.26% | 3.28% | 3.28% | 3.28% | |
| Debt Investments | Education Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 13,235 | ||||||||
| Investments, at fair value | $ 13,231 | ||||||||
| Percent of net assets | 3.79% | 3.79% | 3.79% | 3.79% | |||||
| Debt Investments | Electric Utilities | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 10,341 | $ 10,299 | |||||||
| Investments, at fair value | $ 10,411 | $ 10,296 | |||||||
| Percent of net assets | 3.13% | 2.94% | 3.13% | 3.13% | 3.13% | 2.94% | 2.94% | 2.94% | |
| Debt Investments | Electronic Equipment & Instruments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 6,684 | ||||||||
| Investments, at fair value | $ 6,687 | ||||||||
| Percent of net assets | 1.91% | 1.91% | 1.91% | 1.91% | |||||
| Debt Investments | Environmental & Facilities Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 18,031 | $ 32,174 | |||||||
| Investments, at fair value | $ 17,859 | $ 32,173 | |||||||
| Percent of net assets | 5.39% | 9.20% | 5.39% | 5.39% | 5.39% | 9.20% | 9.20% | 9.20% | |
| Debt Investments | Health Care Facilities | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 10,266 | $ 36,949 | |||||||
| Investments, at fair value | $ 10,131 | $ 25,576 | |||||||
| Percent of net assets | 3.06% | 7.31% | 3.06% | 3.06% | 3.06% | 7.31% | 7.31% | 7.31% | |
| Debt Investments | Health Care Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 24,241 | $ 57,609 | |||||||
| Investments, at fair value | $ 23,333 | $ 57,037 | |||||||
| Percent of net assets | 7.02% | 16.30% | 7.02% | 7.02% | 7.02% | 16.30% | 16.30% | 16.30% | |
| Debt Investments | Health Care Supplies | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 23,215 | ||||||||
| Investments, at fair value | $ 23,090 | ||||||||
| Percent of net assets | 6.95% | 6.95% | 6.95% | 6.95% | |||||
| Debt Investments | Heavy Electrical Equipment | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 14,750 | $ 11,027 | |||||||
| Investments, at fair value | $ 14,520 | $ 11,088 | |||||||
| Percent of net assets | 4.36% | 3.17% | 4.36% | 4.36% | 4.36% | 3.17% | 3.17% | 3.17% | |
| Debt Investments | Home Furnishings | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 25,338 | $ 24,479 | |||||||
| Investments, at fair value | $ 24,780 | $ 24,017 | |||||||
| Percent of net assets | 7.46% | 6.87% | 7.46% | 7.46% | 7.46% | 6.87% | 6.87% | 6.87% | |
| Debt Investments | Household Products | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 12,013 | $ 11,637 | |||||||
| Investments, at fair value | $ 11,153 | $ 11,773 | |||||||
| Percent of net assets | 3.36% | 3.36% | 3.36% | 3.36% | 3.36% | 3.36% | 3.36% | 3.36% | |
| Debt Investments | Household Appliances | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 6,680 | ||||||||
| Investments, at fair value | $ 6,615 | ||||||||
| Percent of net assets | 1.99% | 1.99% | 1.99% | 1.99% | |||||
| Debt Investments | Industrial Machinery | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 9,633 | ||||||||
| Investments, at fair value | $ 9,360 | ||||||||
| Percent of net assets | 2.82% | 2.82% | 2.82% | 2.82% | |||||
| Debt Investments | Interactive Media & Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 7,623 | $ 18,609 | |||||||
| Investments, at fair value | $ 7,545 | $ 18,759 | |||||||
| Percent of net assets | 2.27% | 5.36% | 2.27% | 2.27% | 2.27% | 5.36% | 5.36% | 5.36% | |
| Debt Investments | Internet & Direct Marketing Retail | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 35,005 | $ 41,910 | |||||||
| Investments, at fair value | $ 35,073 | $ 42,440 | |||||||
| Percent of net assets | 10.55% | 12.13% | 10.55% | 10.55% | 10.55% | 12.13% | 12.13% | 12.13% | |
| Debt Investments | Investment Banking & Brokerage | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 11,833 | $ 12,674 | |||||||
| Investments, at fair value | $ 11,860 | $ 12,729 | |||||||
| Percent of net assets | 3.57% | 3.64% | 3.57% | 3.57% | 3.57% | 3.64% | 3.64% | 3.64% | |
| Debt Investments | IT Consulting And Other Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 13,620 | $ 17,679 | |||||||
| Investments, at fair value | $ 13,487 | $ 17,694 | |||||||
| Percent of net assets | 4.06% | 5.06% | 4.06% | 4.06% | 4.06% | 5.06% | 5.06% | 5.06% | |
| Debt Investments | Leisure Facilities | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 22,077 | $ 22,020 | |||||||
| Investments, at fair value | $ 21,795 | $ 21,878 | |||||||
| Percent of net assets | 6.55% | 6.26% | 6.55% | 6.55% | 6.55% | 6.26% | 6.26% | 6.26% | |
| Debt Investments | Leisure Products | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 14,055 | $ 6,115 | |||||||
| Investments, at fair value | $ 13,366 | $ 3,072 | |||||||
| Percent of net assets | 4.02% | 0.88% | 4.02% | 4.02% | 4.02% | 0.88% | 0.88% | 0.88% | |
| Debt Investments | Life Sciences Tools & Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 4,935 | $ 4,925 | |||||||
| Investments, at fair value | $ 4,824 | $ 4,925 | |||||||
| Percent of net assets | 1.45% | 1.41% | 1.45% | 1.45% | 1.45% | 1.41% | 1.41% | 1.41% | |
| Debt Investments | Office Services & Supplies | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 27,293 | $ 20,832 | |||||||
| Investments, at fair value | $ 25,832 | $ 20,921 | |||||||
| Percent of net assets | 7.78% | 5.98% | 7.78% | 7.78% | 7.78% | 5.98% | 5.98% | 5.98% | |
| Debt Investments | Packaged Foods & Meats | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 11,198 | $ 11,084 | |||||||
| Investments, at fair value | $ 10,941 | $ 10,862 | |||||||
| Percent of net assets | 3.30% | 3.11% | 3.30% | 3.30% | 3.30% | 3.11% | 3.11% | 3.11% | |
| Debt Investments | Personal Products | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 13,694 | $ 12,055 | |||||||
| Investments, at fair value | $ 13,482 | $ 12,260 | |||||||
| Percent of net assets | 4.06% | 3.50% | 4.06% | 4.06% | 4.06% | 3.50% | 3.50% | 3.50% | |
| Debt Investments | Real Estate Operating Companies | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 5,309 | $ 5,425 | |||||||
| Investments, at fair value | $ 5,309 | $ 5,431 | |||||||
| Percent of net assets | 1.60% | 1.56% | 1.60% | 1.60% | 1.60% | 1.56% | 1.56% | 1.56% | |
| Debt Investments | Real Estate Development [Member] | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 8,103 | ||||||||
| Investments, at fair value | $ 8,103 | ||||||||
| Percent of net assets | 2.44% | 2.44% | 2.44% | 2.44% | |||||
| Debt Investments | Research & Consulting Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 22,050 | $ 23,987 | |||||||
| Investments, at fair value | $ 21,896 | $ 23,822 | |||||||
| Percent of net assets | 6.59% | 6.81% | 6.59% | 6.59% | 6.59% | 6.81% | 6.81% | 6.81% | |
| Debt Investments | Specialized Consumer Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 36,883 | $ 35,322 | |||||||
| Investments, at fair value | $ 36,892 | $ 35,385 | |||||||
| Percent of net assets | 11.10% | 10.11% | 11.10% | 11.10% | 11.10% | 10.11% | 10.11% | 10.11% | |
| Debt Investments | Specialized Finance | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 60,000 | ||||||||
| Investments, at fair value | $ 60,000 | ||||||||
| Percent of net assets | 17.16% | 17.16% | 17.16% | 17.16% | |||||
| Debt Investments | Systems Software | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 19,353 | $ 19,018 | |||||||
| Investments, at fair value | $ 17,847 | $ 19,160 | |||||||
| Percent of net assets | 5.37% | 5.48% | 5.37% | 5.37% | 5.37% | 5.48% | 5.48% | 5.48% | |
| Debt Investments | Technology Hardware, Storage & Peripherals | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 16,466 | $ 22,717 | |||||||
| Investments, at fair value | $ 16,693 | $ 23,117 | |||||||
| Percent of net assets | 5.02% | 6.61% | 5.02% | 5.02% | 5.02% | 6.61% | 6.61% | 6.61% | |
| Subordinated Debt [Member] | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investments, amortized cost | $ 167 | $ 167 | |||||||
| Investments, at fair value | $ 167 | $ 167 | |||||||
| Equity Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 46,486 | $ 36,991 | |||||||
| Investments, at fair value | $ 41,160 | $ 38,159 | |||||||
| Percent of net assets | 12.41% | 10.92% | 12.41% | 12.41% | 12.41% | 10.92% | 10.92% | 10.92% | |
| Equity Investments | Advertising | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 258 | $ 250 | |||||||
| Investments, at fair value | $ 154 | $ 250 | |||||||
| Percent of net assets | 0.05% | 0.07% | 0.05% | 0.05% | 0.05% | 0.07% | 0.07% | 0.07% | |
| Equity Investments | Air Freight & Logistics | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 1,250 | $ 1,250 | |||||||
| Investments, at fair value | $ 517 | $ 1,250 | |||||||
| Percent of net assets | 0.16% | 0.36% | 0.16% | 0.16% | 0.16% | 0.36% | 0.36% | 0.36% | |
| Equity Investments | Building Products | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 423 | ||||||||
| Investments, at fair value | $ 786 | ||||||||
| Percent of net assets | 0.24% | 0.24% | 0.24% | 0.24% | |||||
| Equity Investments | Data Processing & Outsourced Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 423 | ||||||||
| Investments, at fair value | $ 427 | ||||||||
| Percent of net assets | 0.12% | 0.12% | 0.12% | 0.12% | |||||
| Equity Investments | Data Processing And Outsourced Services Acquired on 120420 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 476 | ||||||||
| Investments, at fair value | $ 893 | ||||||||
| Percent of net assets | 0.26% | 0.26% | 0.26% | 0.26% | |||||
| Equity Investments | Diversified Support Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 351 | $ 317 | |||||||
| Investments, at fair value | $ 202 | $ 158 | |||||||
| Percent of net assets | 0.06% | 0.05% | 0.06% | 0.06% | 0.06% | 0.05% | 0.05% | 0.05% | |
| Equity Investments | Education Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 167 | $ 167 | |||||||
| Investments, at fair value | $ 83 | $ 167 | |||||||
| Percent of net assets | 0.02% | 0.05% | 0.02% | 0.02% | 0.02% | 0.05% | 0.05% | 0.05% | |
| Equity Investments | Environmental & Facilities Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 825 | $ 825 | |||||||
| Investments, at fair value | $ 600 | $ 825 | |||||||
| Percent of net assets | 0.18% | 0.24% | 0.18% | 0.18% | 0.18% | 0.24% | 0.24% | 0.24% | |
| Equity Investments | Health Care Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 857 | ||||||||
| Investments, at fair value | $ 1,018 | ||||||||
| Percent of net assets | 0.29% | 0.29% | 0.29% | 0.29% | |||||
| Equity Investments | Industrial Machinery | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 667 | ||||||||
| Investments, at fair value | $ 514 | ||||||||
| Percent of net assets | 0.15% | 0.15% | 0.15% | 0.15% | |||||
| Equity Investments | Interactive Media & Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 851 | $ 850 | |||||||
| Investments, at fair value | $ 1,943 | $ 1,398 | |||||||
| Percent of net assets | 0.58% | 0.40% | 0.58% | 0.58% | 0.58% | 0.40% | 0.40% | 0.40% | |
| Equity Investments | Internet & Direct Marketing Retail | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 1,614 | $ 1,700 | |||||||
| Investments, at fair value | $ 2,118 | $ 3,228 | |||||||
| Percent of net assets | 0.63% | 0.92% | 0.63% | 0.63% | 0.63% | 0.92% | 0.92% | 0.92% | |
| Equity Investments | Investment Banking & Brokerage | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 6,944 | $ 6,944 | |||||||
| Investments, at fair value | $ 6,380 | $ 6,874 | |||||||
| Percent of net assets | 1.92% | 1.97% | 1.92% | 1.92% | 1.92% | 1.97% | 1.97% | 1.97% | |
| Equity Investments | IT Consulting And Other Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 1,612 | $ 1,468 | |||||||
| Investments, at fair value | $ 1,921 | $ 1,468 | |||||||
| Percent of net assets | 0.58% | 0.42% | 0.58% | 0.58% | 0.58% | 0.42% | 0.42% | 0.42% | |
| Equity Investments | Leisure Facilities | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 2,734 | $ 2,734 | |||||||
| Investments, at fair value | $ 184 | $ 264 | |||||||
| Percent of net assets | 0.06% | 0.07% | 0.06% | 0.06% | 0.06% | 0.07% | 0.07% | 0.07% | |
| Equity Investments | Leisure Products | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investments, amortized cost | $ 4,060 | ||||||||
| Percent of net assets | 0.01% | 0.01% | 0.01% | 0.01% | |||||
| Equity Investments | Office Services & Supplies | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Equity Investments | Other Diversified Financial Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 2,890 | $ 2,890 | |||||||
| Investments, at fair value | $ 3,788 | $ 3,492 | |||||||
| Percent of net assets | 1.14% | 1% | 1.14% | 1.14% | 1.14% | 1% | 1% | 1% | |
| Equity Investments | Paper Packaging | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 400 | ||||||||
| Investments, at fair value | $ 283 | ||||||||
| Percent of net assets | 0.09% | 0.09% | 0.09% | 0.09% | |||||
| Equity Investments | Real Estate Operating Companies | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investments, amortized cost | $ 600 | ||||||||
| Investments, at fair value | $ 600 | ||||||||
| Percent of net assets | 0.18% | 0.18% | 0.18% | 0.18% | |||||
| Equity Investments | Specialized Consumer Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 840 | $ 840 | |||||||
| Investments, at fair value | $ 927 | $ 840 | |||||||
| Percent of net assets | 0.29% | 0.24% | 0.29% | 0.29% | 0.29% | 0.24% | 0.24% | 0.24% | |
| Equity Investments | Specialized Finance | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investments, amortized cost | $ 20,000 | $ 15,000 | |||||||
| Investments, at fair value | $ 20,160 | $ 15,607 | |||||||
| Percent of net assets | 6.07% | 4.46% | 6.07% | 6.07% | 6.07% | 4.46% | 4.46% | 4.46% | |
| Non-controlled/non-affiliate company investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investments, at fair value | $ 650,535 | $ 736,727 | |||||||
| Investment, Identifier [Axis]: ABB/Con-cise Optical Group LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ABBCon-ciseOpticalGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Supplies | Health Care Supplies | Health Care Supplies | Health Care Supplies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | |||||
| Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||||
| Spread Above Index | 6.51% | 6.51% | 6.51% | 6.51% | |||||
| Interest Rate | 13.98% | 13.98% | 13.98% | 13.98% | |||||
| Acquisition Date | Feb. 23, 2022 | ||||||||
| Maturity Date | Feb. 23, 2028 | Feb. 23, 2028 | Feb. 23, 2028 | Feb. 23, 2028 | |||||
| Principal/Share Amount | $ 2,151 | ||||||||
| Investments, amortized cost | 2,105 | ||||||||
| Investments, at fair value | $ 2,093 | ||||||||
| Percent of net assets | 0.63% | 0.63% | 0.63% | 0.63% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: ABB/Con-cise Optical Group LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ABBCon-ciseOpticalGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Supplies | Health Care Supplies | Health Care Supplies | Health Care Supplies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||||
| Spread Above Index | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Interest Rate | 12.67% | 12.67% | 12.67% | 12.67% | |||||
| Acquisition Date | Feb. 23, 2022 | ||||||||
| Maturity Date | Feb. 23, 2028 | Feb. 23, 2028 | Feb. 23, 2028 | Feb. 23, 2028 | |||||
| Principal/Share Amount | $ 21,573 | ||||||||
| Investments, amortized cost | 21,110 | ||||||||
| Investments, at fair value | $ 20,997 | ||||||||
| Percent of net assets | 6.32% | 6.32% | 6.32% | 6.32% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: ALM Media, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:ALMMediaLLCMember | whf:ALMMediaLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.50% | 7% | 6.50% | 6.50% | 6.50% | 7% | 7% | 7% | |
| Interest Rate | 10.91% | 8% | 10.91% | 10.91% | 10.91% | 8% | 8% | 8% | |
| Acquisition Date | Nov. 25, 2019 | Nov. 25, 2019 | |||||||
| Maturity Date | Nov. 25, 2024 | Nov. 25, 2024 | Nov. 25, 2024 | Nov. 25, 2024 | Nov. 25, 2024 | Nov. 25, 2024 | Nov. 25, 2024 | Nov. 25, 2024 | |
| Principal/Share Amount | $ 13,388 | $ 14,175 | |||||||
| Investments, amortized cost | 13,286 | 14,011 | |||||||
| Investments, at fair value | $ 13,255 | $ 13,996 | |||||||
| Percent of net assets | 3.99% | 4% | 3.99% | 3.99% | 3.99% | 4% | 4% | 4% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: AST Applications Software Technology LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ASTApplicationsSoftwareTechnologyLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 8% | 8% | 8% | 8% | |||||
| Interest Rate | 9% | 9% | 9% | 9% | |||||
| Investment, interest rate, paid in cash | 8% | 8% | 8% | 8% | |||||
| PIK interest rate | 1% | 1% | 1% | 1% | |||||
| Acquisition Date | Jan. 10, 2017 | ||||||||
| Maturity Date | Jan. 10, 2023 | Jan. 10, 2023 | Jan. 10, 2023 | Jan. 10, 2023 | |||||
| Principal/Share Amount | $ 3,958 | ||||||||
| Investments, amortized cost | 3,943 | ||||||||
| Investments, at fair value | $ 3,958 | ||||||||
| Percent of net assets | 1.13% | 1.13% | 1.13% | 1.13% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: ATSG Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ATSGIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 11.14% | 11.14% | 11.14% | 11.14% | |||||
| Acquisition Date | Nov. 12, 2021 | ||||||||
| Maturity Date | Nov. 12, 2026 | Nov. 12, 2026 | Nov. 12, 2026 | Nov. 12, 2026 | |||||
| Principal/Share Amount | $ 13,833 | ||||||||
| Investments, amortized cost | 13,620 | ||||||||
| Investments, at fair value | $ 13,487 | ||||||||
| Percent of net assets | 4.06% | 4.06% | 4.06% | 4.06% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: ATSG, First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ATSGIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | Nov. 12, 2021 | ||||||||
| Maturity Date | Nov. 12, 2026 | Nov. 12, 2026 | Nov. 12, 2026 | Nov. 12, 2026 | |||||
| Principal/Share Amount | $ 14,008 | ||||||||
| Investments, amortized cost | 13,736 | ||||||||
| Investments, at fair value | $ 13,736 | ||||||||
| Percent of net assets | 3.93% | 3.93% | 3.93% | 3.93% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Access USA Shipping, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:AccessUSAShippingLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Spread Above Index | 8% | 8% | 8% | 8% | |||||
| Interest Rate | 9.50% | 9.50% | 9.50% | 9.50% | |||||
| Acquisition Date | Feb. 08, 2019 | ||||||||
| Maturity Date | Feb. 08, 2024 | Feb. 08, 2024 | Feb. 08, 2024 | Feb. 08, 2024 | |||||
| Principal/Share Amount | $ 4,937 | ||||||||
| Investments, amortized cost | 4,906 | ||||||||
| Investments, at fair value | $ 4,937 | ||||||||
| Percent of net assets | 1.41% | 1.41% | 1.41% | 1.41% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Aeyon LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:AeyonLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 8.88% | 8.88% | 8.88% | 8.88% | |||||
| Interest Rate | 13.19% | 13.19% | 13.19% | 13.19% | |||||
| Acquisition Date | Feb. 10, 2022 | ||||||||
| Maturity Date | Feb. 10, 2027 | Feb. 10, 2027 | Feb. 10, 2027 | Feb. 10, 2027 | |||||
| Principal/Share Amount | $ 8,910 | ||||||||
| Investments, amortized cost | 8,764 | ||||||||
| Investments, at fair value | $ 8,641 | ||||||||
| Percent of net assets | 2.60% | 2.60% | 2.60% | 2.60% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: American Crafts Holdings, LLC, Warrants | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:AmericanCraftsLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | |||||
| Acquisition Date | Dec. 22, 2022 | ||||||||
| Maturity Date | Dec. 22, 2032 | Dec. 22, 2032 | Dec. 22, 2032 | Dec. 22, 2032 | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Non-income Producing [true false] | false | false | false | false | |||||
| Investment, Identifier [Axis]: American Crafts, LC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:AmericanCraftsLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 8.50% | 8.50% | 8.50% | 8.50% | |||||
| Interest Rate | 12.88% | 12.88% | 12.88% | 12.88% | |||||
| Acquisition Date | Oct. 01, 2022 | ||||||||
| Maturity Date | May 28, 2026 | May 28, 2026 | May 28, 2026 | May 28, 2026 | |||||
| Principal/Share Amount | $ 1,367 | ||||||||
| Investments, amortized cost | 1,346 | ||||||||
| Investments, at fair value | $ 1,147 | ||||||||
| Percent of net assets | 0.35% | 0.35% | 0.35% | 0.35% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: American Crafts, LC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:AmericanCraftsLCMember | whf:AmericanCraftsLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 8.50% | 8.50% | 8.50% | 8.50% | 8.50% | 8.50% | 8.50% | 8.50% | |
| Interest Rate | 12.88% | 9.50% | 12.88% | 12.88% | 12.88% | 9.50% | 9.50% | 9.50% | |
| Acquisition Date | May 28, 2021 | May 28, 2021 | |||||||
| Maturity Date | May 28, 2026 | May 28, 2026 | May 28, 2026 | May 28, 2026 | May 28, 2026 | May 28, 2026 | May 28, 2026 | May 28, 2026 | |
| Principal/Share Amount | $ 9,555 | $ 8,434 | |||||||
| Investments, amortized cost | 9,473 | 8,325 | |||||||
| Investments, at fair value | $ 8,244 | $ 8,325 | |||||||
| Percent of net assets | 2.48% | 2.38% | 2.48% | 2.48% | 2.48% | 2.38% | 2.38% | 2.38% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Arcole Holding Corporation Shares | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:ArcoleHoldingCorporationMember | whf:ArcoleHoldingCorporationMember | |||||||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | |
| Acquisition Date | Oct. 01, 2020 | Oct. 01, 2020 | |||||||
| Investments, amortized cost | $ 6,944 | $ 6,944 | |||||||
| Investments, at fair value | $ 6,380 | $ 6,874 | |||||||
| Percent of net assets | 1.92% | 1.97% | 1.92% | 1.92% | 1.92% | 1.97% | 1.97% | 1.97% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | false | false | false | false | false | |
| Investment, Identifier [Axis]: Arcole Holding Corporation, Equity | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ArcoleHoldingCorporationMember | ||||||||
| Investment, Type [Extensible Enumeration] | Equity Investments | Equity Investments | Equity Investments | Equity Investments | |||||
| Investments, at fair value | $ 6,874 | $ 6,448 | |||||||
| Investment, Identifier [Axis]: Arcstor Midco, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:ArcstorMidcoLLCMember | whf:ArcstorMidcoLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 7.50% | 7% | 7.50% | 7.50% | 7.50% | 7% | 7% | 7% | |
| Interest Rate | 11.92% | 8% | 11.92% | 11.92% | 11.92% | 8% | 8% | 8% | |
| Investment, interest rate, paid in cash | 8.17% | 8.17% | 8.17% | 8.17% | |||||
| PIK interest rate | 3.75% | 3.75% | 3.75% | 3.75% | |||||
| Acquisition Date | Mar. 16, 2021 | Mar. 16, 2021 | |||||||
| Maturity Date | Mar. 16, 2027 | Mar. 16, 2027 | Mar. 16, 2027 | Mar. 16, 2027 | Mar. 16, 2027 | Mar. 16, 2027 | Mar. 16, 2027 | Mar. 16, 2027 | |
| Principal/Share Amount | $ 19,623 | $ 19,354 | |||||||
| Investments, amortized cost | 19,353 | 19,018 | |||||||
| Investments, at fair value | $ 17,847 | $ 19,160 | |||||||
| Percent of net assets | 5.37% | 5.48% | 5.37% | 5.37% | 5.37% | 5.48% | 5.48% | 5.48% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Atlas Purchaser, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:AtlasPurchaserIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||||
| Spread Above Index | 5.25% | 9% | 5.25% | 5.25% | 5.25% | 9% | 9% | 9% | |
| Interest Rate | 8.68% | 8.68% | 8.68% | 8.68% | |||||
| Acquisition Date | Aug. 29, 2022 | ||||||||
| Maturity Date | May 08, 2028 | May 08, 2028 | May 08, 2028 | May 08, 2028 | |||||
| Principal/Share Amount | $ 3,097 | ||||||||
| Investments, amortized cost | 2,611 | ||||||||
| Investments, at fair value | $ 2,556 | ||||||||
| Percent of net assets | 0.76% | 0.76% | 0.76% | 0.76% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Atlas Purchaser, Inc Second Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:AtlasPurchaserIncMember | whf:AtlasPurchaserIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 9% | 9% | 9% | 9% | |||||
| Interest Rate | 14.20% | 9.75% | 14.20% | 14.20% | 14.20% | 9.75% | 9.75% | 9.75% | |
| Acquisition Date | May 03, 2021 | May 03, 2021 | |||||||
| Maturity Date | May 07, 2029 | May 07, 2029 | May 07, 2029 | May 07, 2029 | May 07, 2029 | May 07, 2029 | May 07, 2029 | May 07, 2029 | |
| Principal/Share Amount | $ 15,000 | $ 15,000 | |||||||
| Investments, amortized cost | 14,642 | 14,586 | |||||||
| Investments, at fair value | $ 11,969 | $ 14,700 | |||||||
| Percent of net assets | 3.59% | 4.20% | 3.59% | 3.59% | 3.59% | 4.20% | 4.20% | 4.20% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Avision Holdings, LLC Class A LLC Interests | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:AvisionHoldingsLLCMember | Telestream Holdings Corporation [Member] | |||||||
| Investment, Type [Extensible Enumeration] | whf:ClassALLCInterestsMember | whf:ClassALLCInterestsMember | whf:ClassALLCInterestsMember | whf:ClassALLCInterestsMember | whf:ClassALLCInterestsMember | whf:ClassALLCInterestsMember | whf:ClassALLCInterestsMember | whf:ClassALLCInterestsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | Advertising | Advertising | Advertising | Advertising | |
| Acquisition Date | Dec. 15, 2021 | Dec. 15, 2021 | |||||||
| Principal/Share Amount | $ 208 | $ 200 | |||||||
| Investments, amortized cost | 258 | 250 | |||||||
| Investments, at fair value | $ 154 | $ 250 | |||||||
| Percent of net assets | 0.05% | 0.07% | 0.05% | 0.05% | 0.05% | 0.07% | 0.07% | 0.07% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | false | false | false | false | false | |
| Investment, Identifier [Axis]: BBQ Buyer, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:BBQBuyerLLCMember | whf:BBQBuyerLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | |
| Spread Above Index | 9% | 9% | 9% | 9% | |||||
| Interest Rate | 13.38% | 11.50% | 13.38% | 13.38% | 13.38% | 11.50% | 11.50% | 11.50% | |
| Investment, interest rate, paid in cash | 12.38% | 9.50% | 12.38% | 12.38% | 12.38% | 9.50% | 9.50% | 9.50% | |
| PIK interest rate | 1% | 2% | 1% | 1% | 1% | 2% | 2% | 2% | |
| Acquisition Date | Apr. 29, 2022 | Dec. 02, 2021 | |||||||
| Maturity Date | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | |
| Principal/Share Amount | $ 2,593 | $ 2,573 | |||||||
| Investments, amortized cost | 2,557 | 2,523 | |||||||
| Investments, at fair value | $ 2,541 | $ 2,523 | |||||||
| Percent of net assets | 0.76% | 0.72% | 0.76% | 0.76% | 0.76% | 0.72% | 0.72% | 0.72% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: BBQ Buyer, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:BBQBuyerLLCMember | whf:BBQBuyerLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | |
| Spread Above Index | 9% | 10% | 9% | 9% | 9% | 10% | 10% | 10% | |
| Interest Rate | 13.38% | 11.50% | 13.38% | 13.38% | 13.38% | 11.50% | 11.50% | 11.50% | |
| Investment, interest rate, paid in cash | 12.38% | 9.50% | 12.38% | 12.38% | 12.38% | 9.50% | 9.50% | 9.50% | |
| PIK interest rate | 1% | 2% | 1% | 1% | 1% | 2% | 2% | 2% | |
| Acquisition Date | Aug. 28, 2020 | Aug. 28, 2020 | |||||||
| Maturity Date | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | |
| Principal/Share Amount | $ 12,720 | $ 12,623 | |||||||
| Investments, amortized cost | 12,550 | 12,388 | |||||||
| Investments, at fair value | $ 12,465 | $ 12,623 | |||||||
| Percent of net assets | 3.75% | 3.61% | 3.75% | 3.75% | 3.75% | 3.61% | 3.61% | 3.61% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: BBQ Buyer, LLC Shares | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:BBQBuyerLLCMember | whf:BBQBuyerLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |
| Acquisition Date | Aug. 28, 2020 | Aug. 28, 2020 | |||||||
| Principal/Share Amount | $ 1,100 | $ 1,100 | |||||||
| Investments, amortized cost | 1,100 | 1,100 | |||||||
| Investments, at fair value | $ 1,404 | $ 2,442 | |||||||
| Percent of net assets | 0.42% | 0.70% | 0.42% | 0.42% | 0.42% | 0.70% | 0.70% | 0.70% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | false | false | false | false | false | |
| Investment, Identifier [Axis]: BL Products Parent, LP Class A Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:BLProductsParentLPMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery | Industrial Machinery | Industrial Machinery | Industrial Machinery | |||||
| Acquisition Date | Feb. 01, 2022 | ||||||||
| Principal/Share Amount | $ 667 | ||||||||
| Investments, amortized cost | 667 | ||||||||
| Investments, at fair value | $ 514 | ||||||||
| Percent of net assets | 0.15% | 0.15% | 0.15% | 0.15% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Non-income Producing [true false] | false | false | false | false | |||||
| Investment, Identifier [Axis]: BLP Buyer, Inc. First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:BLProductsParentLPMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery | Industrial Machinery | Industrial Machinery | Industrial Machinery | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1.25% | 1.25% | 1.25% | 1.25% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 10.21% | 10.21% | 10.21% | 10.21% | |||||
| Acquisition Date | Oct. 03, 2022 | ||||||||
| Maturity Date | Feb. 01, 2027 | Feb. 01, 2027 | Feb. 01, 2027 | Feb. 01, 2027 | |||||
| Principal/Share Amount | $ 2,149 | ||||||||
| Investments, amortized cost | 2,098 | ||||||||
| Investments, at fair value | $ 2,091 | ||||||||
| Percent of net assets | 0.63% | 0.63% | 0.63% | 0.63% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: BLP Buyer., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF plus 6.25%, Rate 10.67%, Due 2/1/28 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SmaltoInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery | Industrial Machinery | Industrial Machinery | Industrial Machinery | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 10.67% | 10.67% | 10.67% | 10.67% | |||||
| Acquisition Date | Feb. 18, 2022 | ||||||||
| Maturity Date | Feb. 01, 2027 | Feb. 01, 2027 | Feb. 01, 2027 | Feb. 01, 2027 | |||||
| Principal/Share Amount | $ 274 | ||||||||
| Investments, amortized cost | 270 | ||||||||
| Investments, at fair value | $ 259 | ||||||||
| Investment, Identifier [Axis]: BLP Buyer., First Lien Secured Term Loan, Floor 1.25%, Spread SF plus 6.25%, Rate 10.49%, Due 2/1/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SmaltoInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery | Industrial Machinery | Industrial Machinery | Industrial Machinery | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1.25% | 1.25% | 1.25% | 1.25% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 10.49% | 10.49% | 10.49% | 10.49% | |||||
| Acquisition Date | Feb. 18, 2022 | ||||||||
| Maturity Date | Feb. 01, 2027 | Feb. 01, 2027 | Feb. 01, 2027 | Feb. 01, 2027 | |||||
| Principal/Share Amount | $ 8,188 | ||||||||
| Investments, amortized cost | 8,054 | ||||||||
| Investments, at fair value | $ 7,939 | ||||||||
| Investment, Identifier [Axis]: BPII-JL Group Holdings LP Class A Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:BPII-JLGroupHoldingsLPMember | whf:BPII-JLGroupHoldingsLPMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Acquisition Date | Dec. 29, 2021 | Dec. 29, 2021 | |||||||
| Principal/Share Amount | $ 83 | $ 83 | |||||||
| Investments, amortized cost | 825 | 825 | |||||||
| Investments, at fair value | $ 600 | $ 825 | |||||||
| Percent of net assets | 0.18% | 0.24% | 0.18% | 0.18% | 0.18% | 0.24% | 0.24% | 0.24% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | false | false | false | false | false | |
| Investment, Identifier [Axis]: Bridgepoint Healthcare, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:BridgepointHealthcareLLCMember | whf:BridgepointHealthcareLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | |
| Interest Rate | 12.04% | 8.75% | 12.04% | 12.04% | 12.04% | 8.75% | 8.75% | 8.75% | |
| Acquisition Date | Oct. 05, 2021 | Oct. 05, 2021 | |||||||
| Maturity Date | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | |
| Investments, at fair value | $ (14) | ||||||||
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Bridgepoint Healthcare, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:BridgepointHealthcareLLCMember | whf:BridgepointHealthcareLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | |
| Interest Rate | 12.04% | 8.75% | 12.04% | 12.04% | 12.04% | 8.75% | 8.75% | 8.75% | |
| Acquisition Date | Oct. 05, 2021 | Oct. 05, 2021 | |||||||
| Maturity Date | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | |
| Investments, at fair value | $ (16) | ||||||||
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Bridgepoint Healthcare, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:BridgepointHealthcareLLCMember | whf:BridgepointHealthcareLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | |
| Interest Rate | 12.04% | 8.75% | 12.04% | 12.04% | 12.04% | 8.75% | 8.75% | 8.75% | |
| Acquisition Date | Oct. 05, 2021 | Oct. 05, 2021 | |||||||
| Maturity Date | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | |
| Principal/Share Amount | $ 10,423 | $ 10,979 | |||||||
| Investments, amortized cost | 10,266 | 10,770 | |||||||
| Investments, at fair value | $ 10,161 | $ 10,769 | |||||||
| Percent of net assets | 3.06% | 3.08% | 3.06% | 3.06% | 3.06% | 3.08% | 3.08% | 3.08% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Bulk Midco, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:BulkMidcoLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Cable & Satellite | Cable & Satellite | Cable & Satellite | Cable & Satellite | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Interest Rate | 11.64% | 11.64% | 11.64% | 11.64% | |||||
| Investment, interest rate, paid in cash | 10.64% | 10.64% | 10.64% | 10.64% | |||||
| PIK interest rate | 1% | 1% | 1% | 1% | |||||
| Acquisition Date | Oct. 28, 2022 | ||||||||
| Maturity Date | Jun. 10, 2024 | Jun. 10, 2024 | Jun. 10, 2024 | Jun. 10, 2024 | |||||
| Principal/Share Amount | $ 2,000 | ||||||||
| Investments, amortized cost | 1,963 | ||||||||
| Investments, at fair value | $ 1,964 | ||||||||
| Percent of net assets | 0.59% | 0.59% | 0.59% | 0.59% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Bulk Midco, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:BulkMidcoLLCMember | whf:BulkMidcoLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Cable & Satellite | Cable & Satellite | Cable & Satellite | Cable & Satellite | Cable & Satellite | Cable & Satellite | Cable & Satellite | Cable & Satellite | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 7.50% | 7.24% | 7.50% | 7.50% | 7.50% | 7.24% | 7.24% | 7.24% | |
| Interest Rate | 11.64% | 8.24% | 11.64% | 11.64% | 11.64% | 8.24% | 8.24% | 8.24% | |
| Acquisition Date | Oct. 28, 2022 | Jun. 08, 2018 | |||||||
| Maturity Date | Jun. 10, 2024 | Jun. 08, 2023 | Jun. 10, 2024 | Jun. 10, 2024 | Jun. 10, 2024 | Jun. 08, 2023 | Jun. 08, 2023 | Jun. 08, 2023 | |
| Principal/Share Amount | $ 19,228 | $ 15,000 | |||||||
| Investments, amortized cost | 19,126 | 14,936 | |||||||
| Investments, at fair value | $ 18,525 | $ 14,526 | |||||||
| Percent of net assets | 5.57% | 4.15% | 5.57% | 5.57% | 5.57% | 4.15% | 4.15% | 4.15% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: CHS Therapy, LLC First Lien Secured Term Loan A | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CHSTherapyLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | Health Care Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Spread Above Index | 9% | 9% | 9% | 9% | |||||
| Interest Rate | 10.50% | 10.50% | 10.50% | 10.50% | |||||
| Investment, interest rate, paid in cash | 10% | 10% | 10% | 10% | |||||
| PIK interest rate | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Acquisition Date | Jun. 14, 2019 | ||||||||
| Maturity Date | Jun. 14, 2024 | Jun. 14, 2024 | Jun. 14, 2024 | Jun. 14, 2024 | |||||
| Principal/Share Amount | $ 7,242 | ||||||||
| Investments, amortized cost | 7,175 | ||||||||
| Investments, at fair value | $ 7,242 | ||||||||
| Percent of net assets | 2.07% | 2.07% | 2.07% | 2.07% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: CHS Therapy, LLC First Lien Secured Term Loan C | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CHSTherapyLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | Health Care Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Spread Above Index | 9% | 9% | 9% | 9% | |||||
| Interest Rate | 10.50% | 10.50% | 10.50% | 10.50% | |||||
| Investment, interest rate, paid in cash | 10% | 10% | 10% | 10% | |||||
| PIK interest rate | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Acquisition Date | Oct. 07, 2020 | ||||||||
| Maturity Date | Jun. 14, 2024 | Jun. 14, 2024 | Jun. 14, 2024 | Jun. 14, 2024 | |||||
| Principal/Share Amount | $ 891 | ||||||||
| Investments, amortized cost | 879 | ||||||||
| Investments, at fair value | $ 891 | ||||||||
| Percent of net assets | 0.25% | 0.25% | 0.25% | 0.25% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: CX Holdco LLC Common Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:CXHoldcoLLCMember | whf:CXHoldcoLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |
| Acquisition Date | May 04, 2021 | May 04, 2021 | |||||||
| Principal/Share Amount | $ 1,068 | $ 972 | |||||||
| Investments, amortized cost | 1,116 | 972 | |||||||
| Investments, at fair value | $ 1,558 | $ 972 | |||||||
| Percent of net assets | 0.47% | 0.28% | 0.47% | 0.47% | 0.47% | 0.28% | 0.28% | 0.28% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | false | false | false | false | false | |
| Investment, Identifier [Axis]: Camp Facility Services Holdings, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:CampFacilityServicesHoldingsLLCMember | whf:CampFacilityServicesHoldingsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Research & Consulting Services | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.89% | 7.50% | 10.89% | 10.89% | 10.89% | 7.50% | 7.50% | 7.50% | |
| Acquisition Date | Nov. 16, 2021 | Nov. 16, 2021 | |||||||
| Maturity Date | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | |
| Investments, at fair value | $ (96) | $ (1) | |||||||
| Percent of net assets | (0.03%) | (0.03%) | (0.03%) | (0.03%) | |||||
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Camp Facility Services Holdings, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CampFacilityServicesHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | Nov. 16, 2021 | ||||||||
| Maturity Date | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Camp Facility Services Holdings, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:CampFacilityServicesHoldingsLLCMember | whf:CampFacilityServicesHoldingsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Research & Consulting Services | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.89% | 7.50% | 10.89% | 10.89% | 10.89% | 7.50% | 7.50% | 7.50% | |
| Acquisition Date | Nov. 16, 2021 | Nov. 16, 2021 | |||||||
| Maturity Date | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | |
| Principal/Share Amount | $ 11,798 | $ 13,000 | |||||||
| Investments, amortized cost | 11,606 | 12,745 | |||||||
| Investments, at fair value | $ 11,326 | $ 12,742 | |||||||
| Percent of net assets | 3.41% | 3.64% | 3.41% | 3.41% | 3.41% | 3.64% | 3.64% | 3.64% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Camp Facility Services Parent, LLC Preferred Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:CampFacilityServicesParentLLCMember | whf:CampFacilityServicesParentLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | |
| Spread Above Index | 10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% | |
| PIK interest rate | 10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% | |
| Acquisition Date | Nov. 16, 2021 | Nov. 16, 2021 | |||||||
| Principal/Share Amount | $ 15 | $ 15 | |||||||
| Investments, amortized cost | 840 | 840 | |||||||
| Investments, at fair value | $ 927 | $ 840 | |||||||
| Percent of net assets | 0.29% | 0.24% | 0.29% | 0.29% | 0.29% | 0.24% | 0.24% | 0.24% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Non-income Producing [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Cennox Holdings Limited, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 5/4/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CennoxHoldingsLimitedMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Jul. 16, 2021 | ||||||||
| Maturity Date | May 04, 2026 | May 04, 2026 | May 04, 2026 | May 04, 2026 | |||||
| Principal/Share Amount | £ | £ 2,866 | ||||||||
| Investments, amortized cost | $ 3,889 | ||||||||
| Investments, at fair value | $ 3,877 | ||||||||
| Investment, Identifier [Axis]: Cennox Holdings Limited, First lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 5/4/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CennoxHoldingsLimitedMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Jul. 16, 2021 | ||||||||
| Maturity Date | May 04, 2026 | May 04, 2026 | May 04, 2026 | May 04, 2026 | |||||
| Principal/Share Amount | £ | £ 864 | ||||||||
| Investments, amortized cost | $ 1,173 | ||||||||
| Investments, at fair value | $ 1,169 | ||||||||
| Investment, Identifier [Axis]: Cennox Holdings Limited., First lien Secured Revolving Loan, Base Rate Floor 1.00%, Spread Rate plus 5.17%, Rate 12.10%, Due 5/4/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CennoxHoldingsLimitedMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 10.99% | 10.99% | 10.99% | 10.99% | |||||
| Acquisition Date | Jul. 16, 2021 | ||||||||
| Maturity Date | May 04, 2026 | May 04, 2026 | May 04, 2026 | May 04, 2026 | |||||
| Investments, at fair value | $ (161) | ||||||||
| Investment, Identifier [Axis]: Cennox Holdings Limited., First lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 10.02%, Due 5/4/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CennoxHoldingsLimitedMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 10.02% | 10.02% | 10.02% | 10.02% | |||||
| Acquisition Date | Jul. 16, 2021 | ||||||||
| Maturity Date | May 04, 2026 | May 04, 2026 | May 04, 2026 | May 04, 2026 | |||||
| Principal/Share Amount | £ | £ 2,837 | ||||||||
| Investments, amortized cost | $ 3,863 | ||||||||
| Investments, at fair value | $ 3,343 | ||||||||
| Investment, Identifier [Axis]: Cennox Holdings Limited., First lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 10.99%, Due 5/4/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CennoxHoldingsLimitedMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 10.99% | 10.99% | 10.99% | 10.99% | |||||
| Acquisition Date | Jun. 28, 2022 | ||||||||
| Maturity Date | May 04, 2026 | May 04, 2026 | May 04, 2026 | May 04, 2026 | |||||
| Principal/Share Amount | € | € 9,458 | ||||||||
| Investments, amortized cost | $ 9,834 | ||||||||
| Investments, at fair value | $ 9,926 | ||||||||
| Investment, Identifier [Axis]: Cennox, Inc., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 5/4/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CennoxInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Jun. 28, 2021 | ||||||||
| Maturity Date | May 04, 2026 | May 04, 2026 | May 04, 2026 | May 04, 2026 | |||||
| Principal/Share Amount | $ 8,915 | ||||||||
| Investments, amortized cost | 8,755 | ||||||||
| Investments, at fair value | $ 8,915 | ||||||||
| Investment, Identifier [Axis]: Cennox, Inc., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 5/4/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CennoxInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Jun. 28, 2021 | ||||||||
| Maturity Date | May 04, 2026 | May 04, 2026 | May 04, 2026 | May 04, 2026 | |||||
| Principal/Share Amount | $ 561 | ||||||||
| Investments, amortized cost | 551 | ||||||||
| Investments, at fair value | $ 569 | ||||||||
| Investment, Identifier [Axis]: Cennox, Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 5/4/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CennoxInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Jun. 28, 2021 | ||||||||
| Maturity Date | May 04, 2026 | May 04, 2026 | May 04, 2026 | May 04, 2026 | |||||
| Principal/Share Amount | $ 8,525 | ||||||||
| Investments, amortized cost | 8,365 | ||||||||
| Investments, at fair value | $ 8,438 | ||||||||
| Investment, Identifier [Axis]: Claridge Products and Equipment, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ClaridgeProductsandEquipmentLLCMember | whf:ClaridgeProductsandEquipmentLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Construction Materials | Construction Materials | Construction Materials | Construction Materials | Construction Materials | Construction Materials | Construction Materials | Construction Materials | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:BaseRateMember | us-gaap:PrimeRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | |
| Floor | 1% | 3.25% | 1% | 1% | 1% | 3.25% | 3.25% | 3.25% | |
| Spread Above Index | 5.88% | 5.50% | 5.88% | 5.88% | 5.88% | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 12.28% | 8.75% | 12.28% | 12.28% | 12.28% | 8.75% | 8.75% | 8.75% | |
| Acquisition Date | Dec. 30, 2020 | Dec. 30, 2020 | |||||||
| Maturity Date | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | |
| Principal/Share Amount | $ 779 | $ 211 | |||||||
| Investments, amortized cost | 772 | 207 | |||||||
| Investments, at fair value | $ 732 | $ 204 | |||||||
| Percent of net assets | 0.22% | 0.06% | 0.22% | 0.22% | 0.22% | 0.06% | 0.06% | 0.06% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Claridge Products and Equipment, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:ClaridgeProductsandEquipmentLLCMember | whf:ClaridgeProductsandEquipmentLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Construction Materials | Construction Materials | Construction Materials | Construction Materials | Construction Materials | Construction Materials | Construction Materials | Construction Materials | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 11.23% | 7.50% | 11.23% | 11.23% | 11.23% | 7.50% | 7.50% | 7.50% | |
| Acquisition Date | Dec. 30, 2020 | Dec. 30, 2020 | |||||||
| Maturity Date | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | |
| Principal/Share Amount | $ 7,079 | $ 7,640 | |||||||
| Investments, amortized cost | 6,994 | 7,518 | |||||||
| Investments, at fair value | $ 6,727 | $ 7,469 | |||||||
| Percent of net assets | 2.01% | 2.14% | 2.01% | 2.01% | 2.01% | 2.14% | 2.14% | 2.14% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: CleanChoice Energy, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:CleanChoiceEnergyIncMember | whf:CleanChoiceEnergyIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Electric Utilities | Electric Utilities | Electric Utilities | Electric Utilities | Electric Utilities | Electric Utilities | Electric Utilities | Electric Utilities | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | |
| Interest Rate | 11.33% | 8.25% | 11.33% | 11.33% | 11.33% | 8.25% | 8.25% | 8.25% | |
| Acquisition Date | Oct. 12, 2021 | Oct. 12, 2021 | |||||||
| Maturity Date | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | |
| Principal/Share Amount | $ 10,500 | $ 10,500 | |||||||
| Investments, amortized cost | 10,341 | 10,299 | |||||||
| Investments, at fair value | $ 10,411 | $ 10,296 | |||||||
| Percent of net assets | 3.13% | 2.94% | 3.13% | 3.13% | 3.13% | 2.94% | 2.94% | 2.94% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Coastal Television Broadcasting Group LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:CoastalTelevisionBroadcastingGroupLLCMember | whf:CoastalTelevisionBroadcastingGroupLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Broadcasting | Broadcasting | Broadcasting | Broadcasting | Broadcasting | Broadcasting | Broadcasting | Broadcasting | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.80% | 7.50% | 10.80% | 10.80% | 10.80% | 7.50% | 7.50% | 7.50% | |
| Acquisition Date | Dec. 30, 2021 | Dec. 30, 2021 | |||||||
| Maturity Date | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | |
| Investments, at fair value | $ (5) | ||||||||
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Coastal Television Broadcasting Group LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:CoastalTelevisionBroadcastingGroupLLCMember | whf:CoastalTelevisionBroadcastingGroupLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Broadcasting | Broadcasting | Broadcasting | Broadcasting | Broadcasting | Broadcasting | Broadcasting | Broadcasting | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.80% | 7.50% | 10.80% | 10.80% | 10.80% | 7.50% | 7.50% | 7.50% | |
| Acquisition Date | Dec. 30, 2021 | Dec. 30, 2021 | |||||||
| Maturity Date | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | |
| Principal/Share Amount | $ 8,036 | $ 8,191 | |||||||
| Investments, amortized cost | 7,908 | 8,027 | |||||||
| Investments, at fair value | $ 7,785 | $ 8,027 | |||||||
| Percent of net assets | 2.34% | 2.30% | 2.34% | 2.34% | 2.34% | 2.30% | 2.30% | 2.30% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Crown Brands LLC Second Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CrownBrandsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:SecondLienSecuredDelayedDrawLoanMember | whf:SecondLienSecuredDelayedDrawLoanMember | whf:SecondLienSecuredDelayedDrawLoanMember | whf:SecondLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Distributors | Distributors | Distributors | Distributors | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Spread Above Index | 10.50% | 10.50% | 10.50% | 10.50% | |||||
| Interest Rate | 12% | 12% | 12% | 12% | |||||
| Acquisition Date | Dec. 15, 2020 | ||||||||
| Maturity Date | Jan. 08, 2026 | Jan. 08, 2026 | Jan. 08, 2026 | Jan. 08, 2026 | |||||
| Principal/Share Amount | $ 650 | ||||||||
| Investments, amortized cost | 650 | ||||||||
| Investments, at fair value | $ 520 | ||||||||
| Percent of net assets | 0.15% | 0.15% | 0.15% | 0.15% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Interest Issuer May Pay In Cash Or Cash And PIK. | 2% | ||||||||
| Investment, Identifier [Axis]: Crown Brands LLC Second Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CrownBrandsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Distributors | Distributors | Distributors | Distributors | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Spread Above Index | 10.50% | 10.50% | 10.50% | 10.50% | |||||
| Interest Rate | 12% | 12% | 12% | 12% | |||||
| Acquisition Date | Dec. 15, 2020 | ||||||||
| Maturity Date | Jan. 08, 2026 | Jan. 08, 2026 | Jan. 08, 2026 | Jan. 08, 2026 | |||||
| Principal/Share Amount | $ 4,382 | ||||||||
| Investments, amortized cost | 4,299 | ||||||||
| Investments, at fair value | $ 3,505 | ||||||||
| Percent of net assets | 1% | 1% | 1% | 1% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Interest Issuer May Pay In Cash Or Cash And PIK. | 2% | ||||||||
| Investment, Identifier [Axis]: DCA Investment Holding, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:DCAInvestmentHoldingLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | Health Care Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Mar. 12, 2021 | ||||||||
| Maturity Date | Mar. 12, 2027 | Mar. 12, 2027 | Mar. 12, 2027 | Mar. 12, 2027 | |||||
| Principal/Share Amount | $ 678 | ||||||||
| Investments, amortized cost | 672 | ||||||||
| Investments, at fair value | $ 688 | ||||||||
| Percent of net assets | 0.20% | 0.20% | 0.20% | 0.20% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: DCA Investment Holding, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:DCAInvestmentHoldingLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | Health Care Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Mar. 12, 2021 | ||||||||
| Maturity Date | Mar. 12, 2027 | Mar. 12, 2027 | Mar. 12, 2027 | Mar. 12, 2027 | |||||
| Principal/Share Amount | $ 7,025 | ||||||||
| Investments, amortized cost | 6,933 | ||||||||
| Investments, at fair value | $ 6,988 | ||||||||
| Percent of net assets | 2% | 2% | 2% | 2% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Drew Foam Companies Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:DrewFoamCompaniesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Nov. 05, 2020 | ||||||||
| Maturity Date | Nov. 05, 2025 | Nov. 05, 2025 | Nov. 05, 2025 | Nov. 05, 2025 | |||||
| Principal/Share Amount | $ 7,207 | ||||||||
| Investments, amortized cost | 7,094 | ||||||||
| Investments, at fair value | $ 7,183 | ||||||||
| Percent of net assets | 2.05% | 2.05% | 2.05% | 2.05% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Drew Foam Companies Inc First Lien Secured Term Loan Due 11/5/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:DrewFoamCompaniesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Interest Rate | 11.48% | 11.48% | 11.48% | 11.48% | |||||
| Acquisition Date | Nov. 09, 2020 | ||||||||
| Maturity Date | Nov. 05, 2025 | Nov. 05, 2025 | Nov. 05, 2025 | Nov. 05, 2025 | |||||
| Principal/Share Amount | $ 14,270 | ||||||||
| Investments, amortized cost | 14,105 | ||||||||
| Investments, at fair value | $ 14,132 | ||||||||
| Investment, Identifier [Axis]: Drew Foam Companies Inc, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 11/5/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:DrewFoamCompaniesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Nov. 09, 2020 | ||||||||
| Maturity Date | Nov. 05, 2025 | Nov. 05, 2025 | Nov. 05, 2025 | Nov. 05, 2025 | |||||
| Principal/Share Amount | $ 7,207 | ||||||||
| Investments, amortized cost | 7,096 | ||||||||
| Investments, at fair value | $ 7,183 | ||||||||
| Investment, Identifier [Axis]: E-Phoenix Acquisition Co. Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 5.50%, Rate 10.23%, Due 6/23/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:E-PhoenixAcquisitionCo.Inc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | |||||
| Interest Rate | 10.23% | 10.23% | 10.23% | 10.23% | |||||
| Acquisition Date | Jul. 15, 2021 | ||||||||
| Maturity Date | Jun. 23, 2027 | Jun. 23, 2027 | Jun. 23, 2027 | Jun. 23, 2027 | |||||
| Principal/Share Amount | $ 8,865 | ||||||||
| Investments, amortized cost | 8,782 | ||||||||
| Investments, at fair value | $ 8,686 | ||||||||
| Investment, Identifier [Axis]: E-Phoenix Acquisition Co. Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 5.75%, Rate 6.75%, Due 6/23/2027 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:E-PhoenixAcquisitionCo.Inc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||||
| Interest Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Acquisition Date | Jul. 15, 2021 | ||||||||
| Maturity Date | Jun. 23, 2027 | Jun. 23, 2027 | Jun. 23, 2027 | Jun. 23, 2027 | |||||
| Principal/Share Amount | $ 8,955 | ||||||||
| Investments, amortized cost | 8,852 | ||||||||
| Investments, at fair value | $ 8,901 | ||||||||
| Investment, Identifier [Axis]: Eddy Acquisitions, LLC Preferred Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:EddyAcquisitionsLLCMember | whf:EddyAcquisitionsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | us-gaap:PreferredStockMember | whf:PreferredUnitsMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Education Services | Education Services | Education Services | Education Services | Education Services | Education Services | Education Services | Education Services | |
| Spread Above Index | 12% | 12% | 12% | 12% | 12% | 12% | 12% | 12% | |
| Interest Rate | 12% | 12% | 12% | 12% | 12% | 12% | 12% | 12% | |
| Acquisition Date | Sep. 15, 2021 | Sep. 15, 2021 | |||||||
| Principal/Share Amount | $ 167 | $ 167 | |||||||
| Investments, amortized cost | 167 | 167 | |||||||
| Investments, at fair value | $ 83 | $ 167 | |||||||
| Percent of net assets | 0.02% | 0.05% | 0.02% | 0.02% | 0.02% | 0.05% | 0.05% | 0.05% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Non-income Producing [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Education Networks of America, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:EducationNetworksofAmericaIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | |||||
| Interest Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Acquisition Date | Nov. 30, 2021 | ||||||||
| Maturity Date | Oct. 27, 2026 | Oct. 27, 2026 | Oct. 27, 2026 | Oct. 27, 2026 | |||||
| Principal/Share Amount | $ 4,719 | ||||||||
| Investments, amortized cost | 4,511 | ||||||||
| Investments, at fair value | $ 4,508 | ||||||||
| Percent of net assets | 1.29% | 1.29% | 1.29% | 1.29% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: EducationDynamics, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:EducationDynamicsLLCMember | whf:EducationDynamicsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Education Services | Education Services | Education Services | Education Services | Education Services | Education Services | Education Services | Education Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 7% | 7% | 7% | 7% | 7% | 7% | 7% | 7% | |
| Interest Rate | 11.39% | 8% | 11.39% | 11.39% | 11.39% | 8% | 8% | 8% | |
| Investment, interest rate, paid in cash | 10.89% | 7.50% | 10.89% | 10.89% | 10.89% | 7.50% | 7.50% | 7.50% | |
| PIK interest rate | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | |
| Acquisition Date | Sep. 15, 2021 | Sep. 15, 2021 | |||||||
| Maturity Date | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | |
| Investments, at fair value | $ (26) | ||||||||
| Percent of net assets | (0.01%) | (0.01%) | (0.01%) | (0.01%) | |||||
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: EducationDynamics, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:EducationDynamicsLLCMember | whf:EducationDynamicsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Education Services | Education Services | Education Services | Education Services | Education Services | Education Services | Education Services | Education Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 7% | 7% | 7% | 7% | 7% | 7% | 7% | 7% | |
| Interest Rate | 11.39% | 8% | 11.39% | 11.39% | 11.39% | 8% | 8% | 8% | |
| Investment, interest rate, paid in cash | 10.89% | 7.50% | 10.89% | 10.89% | 10.89% | 7.50% | 7.50% | 7.50% | |
| PIK interest rate | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | |
| Acquisition Date | Sep. 15, 2021 | Sep. 15, 2021 | |||||||
| Maturity Date | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | |
| Investments, at fair value | $ (18) | ||||||||
| Percent of net assets | (0.01%) | (0.01%) | (0.01%) | (0.01%) | |||||
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: EducationDynamics, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:EducationDynamicsLLCMember | whf:EducationDynamicsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Education Services | Education Services | Education Services | Education Services | Education Services | Education Services | Education Services | Education Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 7% | 7% | 7% | 7% | 7% | 7% | 7% | 7% | |
| Interest Rate | 11.39% | 8% | 11.39% | 11.39% | 11.39% | 8% | 8% | 8% | |
| Investment, interest rate, paid in cash | 10.89% | 7.50% | 10.89% | 10.89% | 10.89% | 7.50% | 7.50% | 7.50% | |
| PIK interest rate | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | |
| Acquisition Date | Sep. 15, 2021 | Sep. 15, 2021 | |||||||
| Maturity Date | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | |
| Principal/Share Amount | $ 13,053 | $ 13,318 | |||||||
| Investments, amortized cost | 12,861 | 13,068 | |||||||
| Investments, at fair value | $ 12,663 | $ 13,064 | |||||||
| Percent of net assets | 3.80% | 3.74% | 3.80% | 3.80% | 3.80% | 3.74% | 3.74% | 3.74% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: EducationDynamics, LLC Subordinated Unsecured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:EducationDynamicsLLCMember | whf:EducationDynamicsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:SubordinatedUnsecuredTermLoanMember | whf:SubordinatedUnsecuredTermLoanMember | whf:SubordinatedUnsecuredTermLoanMember | whf:SubordinatedUnsecuredTermLoanMember | whf:SubordinatedUnsecuredTermLoanMember | whf:SubordinatedUnsecuredTermLoanMember | whf:SubordinatedUnsecuredTermLoanMember | whf:SubordinatedUnsecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Education Services | Education Services | Education Services | Education Services | Education Services | Education Services | Education Services | Education Services | |
| Spread Above Index | 4% | 4% | 4% | 4% | 4% | 4% | 4% | 4% | |
| Interest Rate | 4% | 4% | 4% | 4% | 4% | 4% | 4% | 4% | |
| Acquisition Date | Sep. 15, 2021 | Sep. 15, 2021 | |||||||
| Maturity Date | Mar. 15, 2027 | Mar. 15, 2027 | Mar. 15, 2027 | Mar. 15, 2027 | Mar. 15, 2027 | Mar. 15, 2027 | Mar. 15, 2027 | Mar. 15, 2027 | |
| Principal/Share Amount | $ 167 | $ 167 | |||||||
| Investments, amortized cost | 167 | 167 | |||||||
| Investments, at fair value | $ 167 | $ 167 | |||||||
| Percent of net assets | 0.05% | 0.05% | 0.05% | 0.05% | 0.05% | 0.05% | 0.05% | 0.05% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Empire Office, Inc First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:EmpireOfficeIncMember | whf:EmpireOfficeIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | |
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | |
| Interest Rate | 11.13% | 8.25% | 11.13% | 11.13% | 11.13% | 8.25% | 8.25% | 8.25% | |
| Acquisition Date | Aug. 17, 2021 | Aug. 17, 2021 | |||||||
| Maturity Date | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | |
| Principal/Share Amount | $ 4,803 | ||||||||
| Investments, amortized cost | 4,746 | ||||||||
| Investments, at fair value | $ 4,754 | $ 7 | |||||||
| Percent of net assets | 1.43% | 1.43% | 1.43% | 1.43% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Empire Office, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:EmpireOfficeIncMember | whf:EmpireOfficeIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | Office Services & Supplies | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | |
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | |
| Interest Rate | 11.13% | 8.25% | 11.13% | 11.13% | 11.13% | 8.25% | 8.25% | 8.25% | |
| Acquisition Date | Apr. 12, 2019 | Apr. 12, 2019 | |||||||
| Maturity Date | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | |
| Principal/Share Amount | $ 11,806 | $ 12,656 | |||||||
| Investments, amortized cost | 11,728 | 12,507 | |||||||
| Investments, at fair value | $ 11,687 | $ 12,589 | |||||||
| Percent of net assets | 3.52% | 3.60% | 3.52% | 3.52% | 3.52% | 3.60% | 3.60% | 3.60% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Epiphany Business Services, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:EpiphanyBusinessServicesLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Interest Rate | 8.50% | 8.50% | 8.50% | 8.50% | |||||
| Acquisition Date | Dec. 04, 2020 | ||||||||
| Maturity Date | Jun. 22, 2023 | Jun. 22, 2023 | Jun. 22, 2023 | Jun. 22, 2023 | |||||
| Principal/Share Amount | $ 3,052 | ||||||||
| Investments, amortized cost | 3,008 | ||||||||
| Investments, at fair value | $ 3,027 | ||||||||
| Percent of net assets | 0.87% | 0.87% | 0.87% | 0.87% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Epiphany Business Services, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:EpiphanyBusinessServicesLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Interest Rate | 8.50% | 8.50% | 8.50% | 8.50% | |||||
| Acquisition Date | Dec. 04, 2020 | ||||||||
| Maturity Date | Jun. 22, 2023 | Jun. 22, 2023 | Jun. 22, 2023 | Jun. 22, 2023 | |||||
| Investments, at fair value | $ 3 | ||||||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Epiphany Business Services, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:EpiphanyBusinessServicesLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Interest Rate | 8.50% | 8.50% | 8.50% | 8.50% | |||||
| Acquisition Date | Dec. 04, 2020 | ||||||||
| Maturity Date | Jun. 22, 2023 | Jun. 22, 2023 | Jun. 22, 2023 | Jun. 22, 2023 | |||||
| Principal/Share Amount | $ 4,278 | ||||||||
| Investments, amortized cost | 4,214 | ||||||||
| Investments, at fair value | $ 4,235 | ||||||||
| Percent of net assets | 1.21% | 1.21% | 1.21% | 1.21% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Escalon Services Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:EscalonServicesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 13.50% | 13.50% | 13.50% | 13.50% | |||||
| Interest Rate | 14.50% | 14.50% | 14.50% | 14.50% | |||||
| Investment, interest rate, paid in cash | 13% | 13% | 13% | 13% | |||||
| PIK interest rate | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Acquisition Date | Dec. 04, 2020 | ||||||||
| Maturity Date | Dec. 04, 2025 | Dec. 04, 2025 | Dec. 04, 2025 | Dec. 04, 2025 | |||||
| Principal/Share Amount | $ 8,046 | ||||||||
| Investments, amortized cost | 7,490 | ||||||||
| Investments, at fair value | $ 8,046 | ||||||||
| Percent of net assets | 2.30% | 2.30% | 2.30% | 2.30% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Escalon Services Inc Warrants | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:EscalonServicesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |||||
| Acquisition Date | Dec. 04, 2020 | ||||||||
| Principal/Share Amount | $ 709 | ||||||||
| Investments, amortized cost | 476 | ||||||||
| Investments, at fair value | $ 893 | ||||||||
| Percent of net assets | 0.26% | 0.26% | 0.26% | 0.26% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Non-income Producing [true false] | false | false | false | false | |||||
| Investment, Identifier [Axis]: FGI Acquisition Corp. (d/b/a Flexitallic Group SAS) First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:FgiAcquisitionCorpMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Commodity Chemicals | Commodity Chemicals | Commodity Chemicals | Commodity Chemicals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7% | 7% | 7% | 7% | |||||
| Interest Rate | 11.73% | 11.73% | 11.73% | 11.73% | |||||
| Investment, interest rate, paid in cash | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| PIK interest rate | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Acquisition Date | Oct. 28, 2019 | ||||||||
| Maturity Date | Oct. 29, 2026 | Oct. 29, 2026 | Oct. 29, 2026 | Oct. 29, 2026 | |||||
| Principal/Share Amount | $ 16,350 | ||||||||
| Investments, amortized cost | 15,794 | ||||||||
| Investments, at fair value | $ 15,859 | ||||||||
| Percent of net assets | 4.77% | 4.77% | 4.77% | 4.77% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: FR Flow Control CB LLC, First Lien Secured Term Loan B, Floor 1.00%, Spread L plus 5.50%, Rate 6.50%, Due 6/28/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:FRFlowControlCBLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery | Industrial Machinery | Industrial Machinery | Industrial Machinery | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | |||||
| Interest Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Acquisition Date | Jul. 19, 2019 | ||||||||
| Maturity Date | Jun. 28, 2026 | Jun. 28, 2026 | Jun. 28, 2026 | Jun. 28, 2026 | |||||
| Principal/Share Amount | $ 6,815 | ||||||||
| Investments, amortized cost | 6,727 | ||||||||
| Investments, at fair value | $ 6,815 | ||||||||
| Investment, Identifier [Axis]: Flexitallic Group SAS First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:FlexitallicGroupSASMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Commodity Chemicals | Commodity Chemicals | Commodity Chemicals | Commodity Chemicals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Interest Rate | 8.50% | 8.50% | 8.50% | 8.50% | |||||
| Investment, interest rate, paid in cash | 8% | 8% | 8% | 8% | |||||
| PIK interest rate | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Acquisition Date | Oct. 28, 2019 | ||||||||
| Maturity Date | Oct. 29, 2026 | Oct. 29, 2026 | Oct. 29, 2026 | Oct. 29, 2026 | |||||
| Principal/Share Amount | $ 15,722 | ||||||||
| Investments, amortized cost | 15,047 | ||||||||
| Investments, at fair value | $ 15,172 | ||||||||
| Percent of net assets | 4.34% | 4.34% | 4.34% | 4.34% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Foodservices Brand Group, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:FoodservicesBrandGroupLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Distributors | Distributors | Distributors | Distributors | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 8% | 8% | 8% | 8% | |||||
| Interest Rate | 12.80% | 12.80% | 12.80% | 12.80% | |||||
| Acquisition Date | Nov. 22, 2022 | ||||||||
| Maturity Date | Dec. 09, 2025 | Dec. 09, 2025 | Dec. 09, 2025 | Dec. 09, 2025 | |||||
| Principal/Share Amount | $ 357 | ||||||||
| Investments, amortized cost | 357 | ||||||||
| Investments, at fair value | $ 330 | ||||||||
| Percent of net assets | 0.10% | 0.10% | 0.10% | 0.10% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Foodservices Brand Group, LLC Second Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:FoodservicesBrandGroupLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Distributors | Distributors | Distributors | Distributors | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 10.92% | 10.92% | 10.92% | 10.92% | |||||
| Acquisition Date | Nov. 22, 2022 | ||||||||
| Maturity Date | Jan. 08, 2026 | Jan. 08, 2026 | Jan. 08, 2026 | Jan. 08, 2026 | |||||
| Principal/Share Amount | $ 5,171 | ||||||||
| Investments, amortized cost | 5,108 | ||||||||
| Investments, at fair value | $ 3,841 | ||||||||
| Percent of net assets | 1.16% | 1.16% | 1.16% | 1.16% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Future Payment Technologies, LP First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:FuturePaymentTechnologiesLPMember | whf:FuturePaymentTechnologiesLPMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 8.25% | 8.25% | 8.25% | 8.25% | 8.25% | 8.25% | 8.25% | 8.25% | |
| Interest Rate | 12.37% | 9.25% | 12.37% | 12.37% | 12.37% | 9.25% | 9.25% | 9.25% | |
| Acquisition Date | Dec. 23, 2016 | Dec. 23, 2016 | |||||||
| Maturity Date | Jun. 07, 2024 | Jun. 07, 2024 | Jun. 07, 2024 | Jun. 07, 2024 | Jun. 07, 2024 | Jun. 07, 2024 | Jun. 07, 2024 | Jun. 07, 2024 | |
| Principal/Share Amount | $ 22,911 | $ 24,000 | |||||||
| Investments, amortized cost | 22,776 | 23,811 | |||||||
| Investments, at fair value | $ 22,817 | $ 23,925 | |||||||
| Percent of net assets | 6.86% | 6.84% | 6.86% | 6.86% | 6.86% | 6.84% | 6.84% | 6.84% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Geo Logic Systems Ltd First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GeoLogicSystemsLtdMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 11.38% | 11.38% | 11.38% | 11.38% | |||||
| Acquisition Date | Jan. 22, 2020 | ||||||||
| Maturity Date | Dec. 19, 2024 | Dec. 19, 2024 | Dec. 19, 2024 | Dec. 19, 2024 | |||||
| Investments, at fair value | $ (9) | ||||||||
| Investment, Identifier [Axis]: Geo Logic Systems Ltd First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GeoLogicSystemsLtdMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 11.38% | 11.38% | 11.38% | 11.38% | |||||
| Acquisition Date | Jan. 22, 2020 | ||||||||
| Maturity Date | Dec. 19, 2024 | Dec. 19, 2024 | Dec. 19, 2024 | Dec. 19, 2024 | |||||
| Principal/Share Amount | $ 20,088 | ||||||||
| Investments, amortized cost | $ 15,413 | ||||||||
| Investments, at fair value | $ 14,545 | ||||||||
| Investment, Identifier [Axis]: Geo Logic Systems Ltd., First Lien Secured Revolving Loan, Floor 1.00%, Spread C plus 6.50%, Rate 7.50%, Due 12/19/2024 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GeoLogicSystemsLtdMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | Jan. 22, 2020 | ||||||||
| Maturity Date | Dec. 19, 2024 | Dec. 19, 2024 | Dec. 19, 2024 | Dec. 19, 2024 | |||||
| Investments, at fair value | $ 4 | ||||||||
| Investment, Identifier [Axis]: Geo Logic Systems Ltd., First Lien Secured Term Loan, Floor 1.00%, Spread C plus 6.50%, Rate 7.50%, Due 12/19/2024 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GeoLogicSystemsLtdMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | Jan. 22, 2020 | ||||||||
| Maturity Date | Dec. 19, 2024 | Dec. 19, 2024 | Dec. 19, 2024 | Dec. 19, 2024 | |||||
| Principal/Share Amount | $ 20,632 | ||||||||
| Investments, amortized cost | $ 15,766 | ||||||||
| Investments, at fair value | $ 16,156 | ||||||||
| Investment, Identifier [Axis]: Grupo HIMA San Pablo, Inc Amended Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GrupoHIMASanPabloIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:AmendedTermLoanMember | whf:AmendedTermLoanMember | whf:AmendedTermLoanMember | whf:AmendedTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | |||||
| Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Spread Above Index | 9% | 9% | 9% | 9% | |||||
| Interest Rate | 10.50% | 10.50% | 10.50% | 10.50% | |||||
| Investment, interest rate, paid in cash | 0% | 0% | 0% | 0% | |||||
| PIK interest rate | 10.50% | 10.50% | 10.50% | 10.50% | |||||
| Acquisition Date | Nov. 24, 2021 | ||||||||
| Maturity Date | Nov. 24, 2023 | Nov. 24, 2023 | Nov. 24, 2023 | Nov. 24, 2023 | |||||
| Principal/Share Amount | $ 1,708 | ||||||||
| Investments, amortized cost | 1,704 | ||||||||
| Investments, at fair value | $ 1,708 | ||||||||
| Percent of net assets | 0.49% | 0.49% | 0.49% | 0.49% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Grupo HIMA San Pablo, Inc First Lien Secured Term Loan A | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GrupoHIMASanPabloIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Spread Above Index | 9% | 9% | 9% | 9% | |||||
| Interest Rate | 9.13% | 9.13% | 9.13% | 9.13% | |||||
| Acquisition Date | May 05, 2019 | ||||||||
| Maturity Date | Apr. 30, 2019 | Apr. 30, 2019 | Apr. 30, 2019 | Apr. 30, 2019 | |||||
| Principal/Share Amount | $ 3,476 | ||||||||
| Investments, amortized cost | 3,476 | ||||||||
| Investments, at fair value | $ 1,169 | ||||||||
| Percent of net assets | 0.33% | 0.33% | 0.33% | 0.33% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Grupo HIMA San Pablo, Inc First Lien Secured Term Loan B | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GrupoHIMASanPabloIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Spread Above Index | 9% | 9% | 9% | 9% | |||||
| Interest Rate | 10.50% | 10.50% | 10.50% | 10.50% | |||||
| Acquisition Date | Feb. 01, 2013 | ||||||||
| Maturity Date | Apr. 30, 2019 | Apr. 30, 2019 | Apr. 30, 2019 | Apr. 30, 2019 | |||||
| Principal/Share Amount | $ 12,185 | ||||||||
| Investments, amortized cost | 12,185 | ||||||||
| Investments, at fair value | $ 4,097 | ||||||||
| Percent of net assets | 1.17% | 1.17% | 1.17% | 1.17% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Grupo HIMA San Pablo, Inc Second Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GrupoHIMASanPabloIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Spread Above Index | 15.75% | 15.75% | 15.75% | 15.75% | |||||
| Interest Rate | 15.75% | 15.75% | 15.75% | 15.75% | |||||
| Investment, interest rate, paid in cash | 13.75% | 13.75% | 13.75% | 13.75% | |||||
| PIK interest rate | 2% | 2% | 2% | 2% | |||||
| Acquisition Date | Feb. 01, 2013 | ||||||||
| Maturity Date | Jul. 31, 2018 | Jul. 31, 2018 | Jul. 31, 2018 | Jul. 31, 2018 | |||||
| Principal/Share Amount | $ 1,028 | ||||||||
| Investments, amortized cost | $ 1,024 | ||||||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Grupo HIMA San Pablo, Inc Superpriority Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GrupoHIMASanPabloIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:SuperpriorityDelayedDrawLoanMember | whf:SuperpriorityDelayedDrawLoanMember | whf:SuperpriorityDelayedDrawLoanMember | whf:SuperpriorityDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities | Health Care Facilities | Health Care Facilities | Health Care Facilities | |||||
| Spread Above Index | 12% | 12% | 12% | 12% | |||||
| Interest Rate | 12% | 12% | 12% | 12% | |||||
| Acquisition Date | Nov. 24, 2021 | ||||||||
| Maturity Date | Nov. 24, 2023 | Nov. 24, 2023 | Nov. 24, 2023 | Nov. 24, 2023 | |||||
| Principal/Share Amount | $ 568 | ||||||||
| Investments, amortized cost | 568 | ||||||||
| Investments, at fair value | $ 568 | ||||||||
| Percent of net assets | 0.16% | 0.16% | 0.16% | 0.16% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Gulf Winds International Acquisition, LLC (d/b/a Gulf Winds International, Inc.) First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GulfWindsInternationalAcquisitionLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7% | 7% | 7% | 7% | |||||
| Interest Rate | 11.43% | 11.43% | 11.43% | 11.43% | |||||
| Acquisition Date | Dec. 16, 2022 | ||||||||
| Maturity Date | Dec. 18, 2028 | Dec. 18, 2028 | Dec. 18, 2028 | Dec. 18, 2028 | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Gulf Winds International Acquisition, LLC (d/b/a Gulf Winds International, Inc.) First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GulfWindsInternationalAcquisitionLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7% | 7% | 7% | 7% | |||||
| Interest Rate | 11.43% | 11.43% | 11.43% | 11.43% | |||||
| Acquisition Date | Dec. 16, 2022 | ||||||||
| Maturity Date | Dec. 18, 2028 | Dec. 18, 2028 | Dec. 18, 2028 | Dec. 18, 2028 | |||||
| Principal/Share Amount | $ 4,853 | ||||||||
| Investments, amortized cost | 4,708 | ||||||||
| Investments, at fair value | $ 4,708 | ||||||||
| Percent of net assets | 1.42% | 1.42% | 1.42% | 1.42% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: HC Salon Holdings, Inc First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:HCSalonHoldingsIncMember | whf:HCSalonHoldingsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Research & Consulting Services | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.50% | 8% | 6.50% | 6.50% | 6.50% | 8% | 8% | 8% | |
| Interest Rate | 11.23% | 9% | 11.23% | 11.23% | 11.23% | 9% | 9% | 9% | |
| Acquisition Date | Sep. 30, 2021 | Sep. 30, 2021 | |||||||
| Maturity Date | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | |
| Investments, at fair value | $ 10 | ||||||||
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: HC Salon Holdings, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:HCSalonHoldingsIncMember | whf:HCSalonHoldingsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Research & Consulting Services | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.50% | 8% | 6.50% | 6.50% | 6.50% | 8% | 8% | 8% | |
| Interest Rate | 11.23% | 9% | 11.23% | 11.23% | 11.23% | 9% | 9% | 9% | |
| Acquisition Date | Sep. 30, 2021 | Sep. 30, 2021 | |||||||
| Maturity Date | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | |
| Principal/Share Amount | $ 11,521 | $ 11,638 | |||||||
| Investments, amortized cost | 11,348 | 11,417 | |||||||
| Investments, at fair value | $ 11,521 | $ 11,416 | |||||||
| Percent of net assets | 3.47% | 3.26% | 3.47% | 3.47% | 3.47% | 3.26% | 3.26% | 3.26% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: HRG Management, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:HRGManagementLLCMember | HRG Management, LLC HomeRiver Group, LLC [Member] | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Interest Rate | 10.48% | 7.25% | 10.48% | 10.48% | 10.48% | 7.25% | 7.25% | 7.25% | |
| Acquisition Date | Dec. 23, 2022 | Oct. 19, 2021 | |||||||
| Maturity Date | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | |
| Principal/Share Amount | $ 653 | ||||||||
| Investments, amortized cost | 644 | ||||||||
| Investments, at fair value | $ 651 | ||||||||
| Percent of net assets | 0.19% | 0.19% | 0.19% | 0.19% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: HRG Management, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | HRG Management, LLC HomeRiver Group, LLC [Member] | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Acquisition Date | Oct. 19, 2021 | ||||||||
| Maturity Date | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: HRG Management, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | HRG Management, LLC HomeRiver Group, LLC [Member] | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Acquisition Date | Oct. 19, 2021 | ||||||||
| Maturity Date | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | |||||
| Principal/Share Amount | $ 4,875 | ||||||||
| Investments, amortized cost | 4,781 | ||||||||
| Investments, at fair value | $ 4,780 | ||||||||
| Percent of net assets | 1.37% | 1.37% | 1.37% | 1.37% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: HRG Management, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 7.25%, Due 10/19/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:HRGManagementLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Acquisition Date | Dec. 28, 2021 | ||||||||
| Maturity Date | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | |||||
| Principal/Share Amount | $ 4,875 | ||||||||
| Investments, amortized cost | 4,781 | ||||||||
| Investments, at fair value | $ 4,780 | ||||||||
| Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Delayed Draw Loan, Floor 1.00% Base Rate Plus, 6.12%, Rate 10.90%, Due 10/19/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:HRGManagementLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.10% | 6.10% | 6.10% | 6.10% | |||||
| Interest Rate | 10.92% | 10.92% | 10.92% | 10.92% | |||||
| Acquisition Date | Feb. 18, 2022 | ||||||||
| Maturity Date | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | |||||
| Principal/Share Amount | $ 1,768 | ||||||||
| Investments, amortized cost | 1,741 | ||||||||
| Investments, at fair value | $ 1,720 | ||||||||
| Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate 10.48%, Due 10/19/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:HRGManagementLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 10.48% | 10.48% | 10.48% | 10.48% | |||||
| Acquisition Date | Feb. 18, 2022 | ||||||||
| Maturity Date | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | |||||
| Investments, at fair value | $ (11) | ||||||||
| Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate 10.48%, Due 10/19/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:HRGManagementLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 10.48% | 10.48% | 10.48% | 10.48% | |||||
| Acquisition Date | Dec. 28, 2021 | ||||||||
| Maturity Date | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | |||||
| Principal/Share Amount | $ 9,653 | ||||||||
| Investments, amortized cost | 9,505 | ||||||||
| Investments, at fair value | $ 9,412 | ||||||||
| Investment, Identifier [Axis]: Hollander Intermediate LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:HollanderIntermediateLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Home Furnishings | Home Furnishings | Home Furnishings | Home Furnishings | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 2% | 2% | 2% | 2% | |||||
| Spread Above Index | 8.75% | 8.75% | 8.75% | 8.75% | |||||
| Interest Rate | 13.19% | 13.19% | 13.19% | 13.19% | |||||
| Acquisition Date | Sep. 19, 2022 | ||||||||
| Maturity Date | Sep. 21, 2026 | Sep. 21, 2026 | Sep. 21, 2026 | Sep. 21, 2026 | |||||
| Principal/Share Amount | $ 4,861 | ||||||||
| Investments, amortized cost | 4,821 | ||||||||
| Investments, at fair value | $ 4,609 | ||||||||
| Percent of net assets | 1.39% | 1.39% | 1.39% | 1.39% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Honors Holdings, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:HonorsHoldingsLLCMember | whf:HonorsHoldingsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 7% | 7.58% | 7% | 7% | 7% | 7.58% | 7.58% | 7.58% | |
| Interest Rate | 11.62% | 8.58% | 11.62% | 11.62% | 11.62% | 8.58% | 8.58% | 8.58% | |
| Investment, interest rate, paid in cash | 8.08% | 8.08% | 8.08% | 8.08% | |||||
| PIK interest rate | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Acquisition Date | Sep. 06, 2019 | Sep. 06, 2019 | |||||||
| Maturity Date | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | |
| Principal/Share Amount | $ 4,649 | $ 4,649 | |||||||
| Investments, amortized cost | 4,621 | 4,611 | |||||||
| Investments, at fair value | $ 4,557 | $ 4,578 | |||||||
| Percent of net assets | 1.37% | 1.31% | 1.37% | 1.37% | 1.37% | 1.31% | 1.31% | 1.31% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Honors Holdings, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:HonorsHoldingsLLCMember | whf:HonorsHoldingsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 7.12% | 7.96% | 7.12% | 7.12% | 7.12% | 7.96% | 7.96% | 7.96% | |
| Interest Rate | 11.73% | 8.96% | 11.73% | 11.73% | 11.73% | 8.96% | 8.96% | 8.96% | |
| Investment, interest rate, paid in cash | 8.46% | 8.46% | 8.46% | 8.46% | |||||
| PIK interest rate | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Acquisition Date | Sep. 06, 2019 | Sep. 06, 2019 | |||||||
| Maturity Date | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | |
| Principal/Share Amount | $ 9,440 | $ 9,440 | |||||||
| Investments, amortized cost | 9,344 | 9,315 | |||||||
| Investments, at fair value | $ 9,254 | $ 9,296 | |||||||
| Percent of net assets | 2.78% | 2.66% | 2.78% | 2.78% | 2.78% | 2.66% | 2.66% | 2.66% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Additional interest for senior term debt | 3.50% | ||||||||
| Investment, Identifier [Axis]: I And I Sales Group, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IAndISalesGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Dec. 15, 2021 | ||||||||
| Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |||||
| Principal/Share Amount | $ 396 | ||||||||
| Investments, amortized cost | 388 | ||||||||
| Investments, at fair value | $ 388 | ||||||||
| Percent of net assets | 0.11% | 0.11% | 0.11% | 0.11% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: I And I Sales Group, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IAndISalesGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Dec. 15, 2021 | ||||||||
| Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: I And I Sales Group, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IAndISalesGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Dec. 15, 2021 | ||||||||
| Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |||||
| Principal/Share Amount | $ 9,286 | ||||||||
| Investments, amortized cost | 9,102 | ||||||||
| Investments, at fair value | $ 9,100 | ||||||||
| Percent of net assets | 2.60% | 2.60% | 2.60% | 2.60% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: I&I Sales Group, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IAndISalesGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||||
| Interest Rate | 10.43% | 10.43% | 10.43% | 10.43% | |||||
| Acquisition Date | Mar. 11, 2022 | ||||||||
| Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |||||
| Principal/Share Amount | $ 2,756 | ||||||||
| Investments, amortized cost | 2,713 | ||||||||
| Investments, at fair value | $ 2,699 | ||||||||
| Investment, Identifier [Axis]: I&I Sales Group, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IAndISalesGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||||
| Interest Rate | 10.43% | 10.43% | 10.43% | 10.43% | |||||
| Acquisition Date | Feb. 18, 2022 | ||||||||
| Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |||||
| Investments, at fair value | $ (3) | ||||||||
| Investment, Identifier [Axis]: I&I Sales Group, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IAndISalesGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||||
| Interest Rate | 10.48% | 10.48% | 10.48% | 10.48% | |||||
| Acquisition Date | Feb. 18, 2022 | ||||||||
| Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |||||
| Principal/Share Amount | $ 9,193 | ||||||||
| Investments, amortized cost | 9,047 | ||||||||
| Investments, at fair value | $ 9,007 | ||||||||
| Investment, Identifier [Axis]: IDIG Parent, LLC, First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/15/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IDIGParentLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | Systems Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Sep. 21, 2021 | ||||||||
| Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |||||
| Principal/Share Amount | $ 1,411 | ||||||||
| Investments, amortized cost | 1,397 | ||||||||
| Investments, at fair value | $ 1,411 | ||||||||
| Investment, Identifier [Axis]: IDIG Parent, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/15/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IDIGParentLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | Systems Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Jun. 25, 2021 | ||||||||
| Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |||||
| Investments, at fair value | $ 5 | ||||||||
| Investment, Identifier [Axis]: IDIG Parent, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/15/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IDIGParentLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | Systems Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Jun. 25, 2021 | ||||||||
| Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |||||
| Principal/Share Amount | $ 8,482 | ||||||||
| Investments, amortized cost | 8,404 | ||||||||
| Investments, at fair value | $ 8,482 | ||||||||
| Investment, Identifier [Axis]: ITS Buyer Inc First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ITSBuyerIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Dec. 22, 2021 | ||||||||
| Maturity Date | Jun. 15, 2026 | Jun. 15, 2026 | Jun. 15, 2026 | Jun. 15, 2026 | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: ITS Buyer Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ITSBuyerIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Dec. 22, 2021 | ||||||||
| Maturity Date | Jun. 15, 2026 | Jun. 15, 2026 | Jun. 15, 2026 | Jun. 15, 2026 | |||||
| Principal/Share Amount | $ 3,612 | ||||||||
| Investments, amortized cost | 3,540 | ||||||||
| Investments, at fair value | $ 3,539 | ||||||||
| Percent of net assets | 1.01% | 1.01% | 1.01% | 1.01% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: ITS Buyer Inc. First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ITSBuyerIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 10.73% | 10.73% | 10.73% | 10.73% | |||||
| Acquisition Date | Feb. 17, 2022 | ||||||||
| Maturity Date | Jun. 15, 2026 | Jun. 15, 2026 | Jun. 15, 2026 | Jun. 15, 2026 | |||||
| Investments, at fair value | $ 3 | ||||||||
| Investment, Identifier [Axis]: ITS Buyer Inc. First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ITSBuyerIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 10.73% | 10.73% | 10.73% | 10.73% | |||||
| Acquisition Date | Feb. 17, 2022 | ||||||||
| Maturity Date | Jun. 15, 2026 | Jun. 15, 2026 | Jun. 15, 2026 | Jun. 15, 2026 | |||||
| Principal/Share Amount | $ 3,577 | ||||||||
| Investments, amortized cost | 3,523 | ||||||||
| Investments, at fair value | $ 3,542 | ||||||||
| Investment, Identifier [Axis]: ImageOne Industries, LLC Common A Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:ImageOneIndustriesLLCMember | whf:ImageOneIndustriesLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:CommonAUnitsMember | whf:CommonAUnitsMember | whf:CommonAUnitsMember | whf:CommonAUnitsMember | whf:CommonAUnitsMember | whf:CommonAUnitsMember | whf:CommonAUnitsMember | whf:CommonAUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |
| Acquisition Date | Sep. 20, 2019 | Sep. 20, 2019 | |||||||
| Principal/Share Amount | $ 229 | $ 225 | |||||||
| Investments, amortized cost | 4 | ||||||||
| Investments, at fair value | $ 92 | $ 158 | |||||||
| Percent of net assets | 0.03% | 0.05% | 0.03% | 0.03% | 0.03% | 0.05% | 0.05% | 0.05% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | false | false | false | false | false | |
| Investment, Identifier [Axis]: Industrial Specialty Services USA LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:IndustrialSpecialtyServicesUSALLCMember | whf:IndustrialSpecialtyServicesUSALLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:BaseRateMember | London Interbank Offered Rate (LIBOR) [Member] | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 5.90% | 6.25% | 5.90% | 5.90% | 5.90% | 6.25% | 6.25% | 6.25% | |
| Interest Rate | 11.41% | 7.25% | 11.41% | 11.41% | 11.41% | 7.25% | 7.25% | 7.25% | |
| Acquisition Date | Dec. 31, 2021 | Dec. 31, 2021 | |||||||
| Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |
| Principal/Share Amount | $ 674 | ||||||||
| Investments, amortized cost | 663 | ||||||||
| Investments, at fair value | $ 649 | ||||||||
| Percent of net assets | 0.20% | 0.20% | 0.20% | 0.20% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Industrial Specialty Services USA LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:IndustrialSpecialtyServicesUSALLCMember | whf:IndustrialSpecialtyServicesUSALLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Interest Rate | 10.98% | 7.25% | 10.98% | 10.98% | 10.98% | 7.25% | 7.25% | 7.25% | |
| Acquisition Date | Dec. 31, 2021 | Dec. 31, 2021 | |||||||
| Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |
| Principal/Share Amount | $ 11,887 | $ 12,007 | |||||||
| Investments, amortized cost | 11,697 | 11,767 | |||||||
| Investments, at fair value | $ 11,559 | $ 11,767 | |||||||
| Percent of net assets | 3.48% | 3.36% | 3.48% | 3.48% | 3.48% | 3.36% | 3.36% | 3.36% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Inspired Beauty Brands, Inc First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:InspiredBeautyBrandsIncMember | whf:InspiredBeautyBrandsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Personal Products | Personal Products | Personal Products | Personal Products | Personal Products | Personal Products | Personal Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 7% | 7% | 7% | 7% | 7% | 7% | 7% | 7% | |
| Interest Rate | 10.78% | 8% | 10.78% | 10.78% | 10.78% | 8% | 8% | 8% | |
| Acquisition Date | Dec. 30, 2020 | Dec. 30, 2020 | |||||||
| Maturity Date | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | |
| Principal/Share Amount | $ 265 | ||||||||
| Investments, amortized cost | 262 | ||||||||
| Investments, at fair value | $ 252 | $ 8 | |||||||
| Percent of net assets | 0.08% | 0.08% | 0.08% | 0.08% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Inspired Beauty Brands, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:InspiredBeautyBrandsIncMember | whf:InspiredBeautyBrandsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Personal Products | Personal Products | Personal Products | Personal Products | Personal Products | Personal Products | Personal Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 7% | 7% | 7% | 7% | 7% | 7% | 7% | 7% | |
| Interest Rate | 11.65% | 8% | 11.65% | 11.65% | 11.65% | 8% | 8% | 8% | |
| Acquisition Date | Dec. 30, 2020 | Dec. 30, 2020 | |||||||
| Maturity Date | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | |
| Principal/Share Amount | $ 11,519 | $ 12,252 | |||||||
| Investments, amortized cost | 11,381 | 12,055 | |||||||
| Investments, at fair value | $ 11,159 | $ 12,252 | |||||||
| Percent of net assets | 3.36% | 3.50% | 3.36% | 3.36% | 3.36% | 3.50% | 3.50% | 3.50% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: IvyRehab Intermediate II, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IvyRehabIntermediateIILLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | Health Care Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Acquisition Date | Dec. 04, 2020 | ||||||||
| Maturity Date | Dec. 04, 2024 | Dec. 04, 2024 | Dec. 04, 2024 | Dec. 04, 2024 | |||||
| Principal/Share Amount | $ 2,550 | ||||||||
| Investments, amortized cost | 2,517 | ||||||||
| Investments, at fair value | $ 2,534 | ||||||||
| Percent of net assets | 0.72% | 0.72% | 0.72% | 0.72% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: IvyRehab Intermediate II, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IvyRehabIntermediateIILLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | Health Care Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | |||||
| Floor | 3.25% | 3.25% | 3.25% | 3.25% | |||||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||||
| Interest Rate | 9% | 9% | 9% | 9% | |||||
| Acquisition Date | Dec. 04, 2020 | ||||||||
| Maturity Date | Dec. 04, 2024 | Dec. 04, 2024 | Dec. 04, 2024 | Dec. 04, 2024 | |||||
| Principal/Share Amount | $ 142 | ||||||||
| Investments, amortized cost | 139 | ||||||||
| Investments, at fair value | $ 147 | ||||||||
| Percent of net assets | 0.04% | 0.04% | 0.04% | 0.04% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: IvyRehab Intermediate II, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IvyRehabIntermediateIILLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | Health Care Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Acquisition Date | Dec. 04, 2020 | ||||||||
| Maturity Date | Dec. 04, 2024 | Dec. 04, 2024 | Dec. 04, 2024 | Dec. 04, 2024 | |||||
| Principal/Share Amount | $ 17,366 | ||||||||
| Investments, amortized cost | 17,121 | ||||||||
| Investments, at fair value | $ 17,366 | ||||||||
| Percent of net assets | 4.97% | 4.97% | 4.97% | 4.97% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: JVMC Holdings Corp First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:JVMCHoldingsCorpMember | whf:JVMCHoldingsCorpMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.50% | 6.75% | 6.50% | 6.50% | 6.50% | 6.75% | 6.75% | 6.75% | |
| Interest Rate | 10.88% | 7.75% | 10.88% | 10.88% | 10.88% | 7.75% | 7.75% | 7.75% | |
| Acquisition Date | Feb. 28, 2019 | Feb. 28, 2019 | |||||||
| Maturity Date | Feb. 28, 2024 | Feb. 28, 2024 | Feb. 28, 2024 | Feb. 28, 2024 | Feb. 28, 2024 | Feb. 28, 2024 | Feb. 28, 2024 | Feb. 28, 2024 | |
| Principal/Share Amount | $ 11,860 | $ 12,729 | |||||||
| Investments, amortized cost | 11,833 | 12,674 | |||||||
| Investments, at fair value | $ 11,860 | $ 12,729 | |||||||
| Percent of net assets | 3.57% | 3.64% | 3.57% | 3.57% | 3.57% | 3.64% | 3.64% | 3.64% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: JZ Capital Partners Ltd First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:JZCapitalPartnersLtdMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Asset Management & Custody Banks | Asset Management & Custody Banks | Asset Management & Custody Banks | Asset Management & Custody Banks | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7% | 7% | 7% | 7% | |||||
| Interest Rate | 11.33% | 11.33% | 11.33% | 11.33% | |||||
| Acquisition Date | Jan. 26, 2022 | ||||||||
| Maturity Date | Jan. 26, 2027 | Jan. 26, 2027 | Jan. 26, 2027 | Jan. 26, 2027 | |||||
| Investments, at fair value | $ 9 | ||||||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: JZ Capital Partners Ltd First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:JZCapitalPartnersLtdMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Asset Management & Custody Banks | Asset Management & Custody Banks | Asset Management & Custody Banks | Asset Management & Custody Banks | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7% | 7% | 7% | 7% | |||||
| Interest Rate | 11.33% | 11.33% | 11.33% | 11.33% | |||||
| Acquisition Date | Jan. 26, 2022 | ||||||||
| Maturity Date | Jan. 26, 2027 | Jan. 26, 2027 | Jan. 26, 2027 | Jan. 26, 2027 | |||||
| Principal/Share Amount | $ 10,286 | ||||||||
| Investments, amortized cost | 10,118 | ||||||||
| Investments, at fair value | $ 10,135 | ||||||||
| Percent of net assets | 3.05% | 3.05% | 3.05% | 3.05% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:JuniperLandscapingHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Dec. 29, 2021 | ||||||||
| Maturity Date | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Delayed Draw Loan Due 12/29/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:JuniperLandscapingHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 11.14% | 11.14% | 11.14% | 11.14% | |||||
| Acquisition Date | Mar. 01, 2022 | ||||||||
| Maturity Date | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | |||||
| Principal/Share Amount | $ 1,909 | ||||||||
| Investments, amortized cost | 1,882 | ||||||||
| Investments, at fair value | $ 1,868 | ||||||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:JuniperLandscapingHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Dec. 29, 2021 | ||||||||
| Maturity Date | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | |||||
| Principal/Share Amount | $ 597 | ||||||||
| Investments, amortized cost | 586 | ||||||||
| Investments, at fair value | $ 586 | ||||||||
| Percent of net assets | 0.17% | 0.17% | 0.17% | 0.17% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Revolving Loan Due 12/29/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:JuniperLandscapingHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 10.54% | 10.54% | 10.54% | 10.54% | |||||
| Acquisition Date | Mar. 01, 2022 | ||||||||
| Maturity Date | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | |||||
| Principal/Share Amount | $ 298 | ||||||||
| Investments, amortized cost | 294 | ||||||||
| Investments, at fair value | $ 287 | ||||||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:JuniperLandscapingHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Dec. 29, 2021 | ||||||||
| Maturity Date | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | |||||
| Principal/Share Amount | $ 11,420 | ||||||||
| Investments, amortized cost | 11,221 | ||||||||
| Investments, at fair value | $ 11,220 | ||||||||
| Percent of net assets | 3.21% | 3.21% | 3.21% | 3.21% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Term Loan Due 12/29/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:JuniperLandscapingHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 11.15% | 11.15% | 11.15% | 11.15% | |||||
| Acquisition Date | Mar. 01, 2022 | ||||||||
| Maturity Date | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | |||||
| Principal/Share Amount | $ 11,306 | ||||||||
| Investments, amortized cost | 11,147 | ||||||||
| Investments, at fair value | $ 11,079 | ||||||||
| Investment, Identifier [Axis]: Keras Holdings, LLC Shares | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:KerasHoldingsLLCMember | whf:KerasHoldingsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |
| Acquisition Date | Dec. 31, 2020 | Dec. 31, 2020 | |||||||
| Principal/Share Amount | $ 496 | $ 496 | |||||||
| Investments, amortized cost | 496 | 496 | |||||||
| Investments, at fair value | $ 363 | $ 496 | |||||||
| Percent of net assets | 0.11% | 0.14% | 0.11% | 0.11% | 0.11% | 0.14% | 0.14% | 0.14% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | false | false | false | false | false | |
| Investment, Identifier [Axis]: LHS Borrower, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LHSBorrowerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Acquisition Date | Sep. 30, 2020 | ||||||||
| Maturity Date | Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2025 | |||||
| Investments, at fair value | $ 4 | ||||||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: LHS Borrower, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LHSBorrowerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Acquisition Date | Sep. 30, 2020 | ||||||||
| Maturity Date | Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2025 | |||||
| Principal/Share Amount | $ 9,506 | ||||||||
| Investments, amortized cost | 9,346 | ||||||||
| Investments, at fair value | $ 9,416 | ||||||||
| Percent of net assets | 2.69% | 2.69% | 2.69% | 2.69% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: LHS Borrower, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.75%, Rate 7.75%, Due 9/30/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LHSBorrowerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Acquisition Date | Oct. 09, 2020 | ||||||||
| Maturity Date | Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2025 | |||||
| Investments, at fair value | $ 4 | ||||||||
| Investment, Identifier [Axis]: LHS Borrower, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.75%, Rate 7.75%, Due 9/30/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LHSBorrowerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Acquisition Date | Oct. 09, 2020 | ||||||||
| Maturity Date | Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2025 | |||||
| Principal/Share Amount | $ 9,506 | ||||||||
| Investments, amortized cost | 9,345 | ||||||||
| Investments, at fair value | $ 9,416 | ||||||||
| Investment, Identifier [Axis]: LINC Systems, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.25%, Rate 7.25%, Due 2/24/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LINCSystemsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Trading Companies And Distributors [Member] | Trading Companies And Distributors [Member] | Trading Companies And Distributors [Member] | Trading Companies And Distributors [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Acquisition Date | Jun. 22, 2021 | ||||||||
| Maturity Date | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | |||||
| Investments, at fair value | $ 12 | ||||||||
| Investment, Identifier [Axis]: LINC Systems, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 7.25%, Due 2/24/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LINCSystemsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Trading Companies And Distributors [Member] | Trading Companies And Distributors [Member] | Trading Companies And Distributors [Member] | Trading Companies And Distributors [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Acquisition Date | Jun. 22, 2021 | ||||||||
| Maturity Date | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | |||||
| Principal/Share Amount | $ 10,135 | ||||||||
| Investments, amortized cost | 9,951 | ||||||||
| Investments, at fair value | $ 10,101 | ||||||||
| Investment, Identifier [Axis]: LINC Systems, LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate 10.52%, Due 2/24/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LINCSystemsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Trading Companies And Distributors [Member] | Trading Companies And Distributors [Member] | Trading Companies And Distributors [Member] | Trading Companies And Distributors [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 10.42% | 10.42% | 10.42% | 10.42% | |||||
| Acquisition Date | Jun. 22, 2021 | ||||||||
| Maturity Date | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | |||||
| Investments, at fair value | $ (1) | ||||||||
| Investment, Identifier [Axis]: LINC Systems, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate 10.52%, Due 2/24/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LINCSystemsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Trading Companies And Distributors [Member] | Trading Companies And Distributors [Member] | Trading Companies And Distributors [Member] | Trading Companies And Distributors [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 10.42% | 10.42% | 10.42% | 10.42% | |||||
| Acquisition Date | Jun. 22, 2021 | ||||||||
| Maturity Date | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | |||||
| Principal/Share Amount | $ 10,033 | ||||||||
| Investments, amortized cost | 9,895 | ||||||||
| Investments, at fair value | $ 9,882 | ||||||||
| Investment, Identifier [Axis]: LMG Holdings, Inc First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LMGHoldingsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | Apr. 30, 2021 | ||||||||
| Maturity Date | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: LMG Holdings, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LMGHoldingsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | Apr. 30, 2021 | ||||||||
| Maturity Date | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | |||||
| Principal/Share Amount | $ 6,802 | ||||||||
| Investments, amortized cost | 6,684 | ||||||||
| Investments, at fair value | $ 6,687 | ||||||||
| Percent of net assets | 1.91% | 1.91% | 1.91% | 1.91% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: LMG Holdings, Inc First Lien Secured Term Loan Due 4/30/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:QuestEventsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Acquisition Date | Jun. 28, 2021 | ||||||||
| Maturity Date | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | |||||
| Principal/Share Amount | $ 13,466 | ||||||||
| Investments, amortized cost | 13,284 | ||||||||
| Investments, at fair value | $ 13,193 | ||||||||
| Investment, Identifier [Axis]: LMG Holdings, Inc. First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:QuestEventsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Acquisition Date | Jun. 28, 2021 | ||||||||
| Maturity Date | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | |||||
| Investments, at fair value | $ (6) | ||||||||
| Investment, Identifier [Axis]: LMG Holdings, Inc., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 4/30/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LMGHoldingsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | Jun. 28, 2021 | ||||||||
| Maturity Date | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | |||||
| Investment, Identifier [Axis]: LMG Holdings, Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 4/30/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LMGHoldingsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | Jun. 28, 2021 | ||||||||
| Maturity Date | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | |||||
| Principal/Share Amount | $ 6,802 | ||||||||
| Investments, amortized cost | 6,680 | ||||||||
| Investments, at fair value | $ 6,687 | ||||||||
| Investment, Identifier [Axis]: LSCS Holdings, Inc Second Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:LSCSHoldingsIncMember | whf:LSCSHoldingsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Life Sciences Tools & Services | Life Sciences Tools & Services | Life Sciences Tools & Services | Life Sciences Tools & Services | Life Sciences Tools & Services | Life Sciences Tools & Services | Life Sciences Tools & Services | Life Sciences Tools & Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | |
| Spread Above Index | 8% | 8% | 8% | 8% | 8% | 8% | 8% | 8% | |
| Interest Rate | 12.38% | 8.50% | 12.38% | 12.38% | 12.38% | 8.50% | 8.50% | 8.50% | |
| Acquisition Date | Nov. 23, 2021 | Nov. 23, 2021 | |||||||
| Maturity Date | Dec. 16, 2029 | Dec. 16, 2029 | Dec. 16, 2029 | Dec. 16, 2029 | Dec. 16, 2029 | Dec. 16, 2029 | Dec. 16, 2029 | Dec. 16, 2029 | |
| Principal/Share Amount | $ 5,000 | $ 5,000 | |||||||
| Investments, amortized cost | 4,935 | 4,925 | |||||||
| Investments, at fair value | $ 4,824 | $ 4,925 | |||||||
| Percent of net assets | 1.45% | 1.41% | 1.45% | 1.45% | 1.45% | 1.41% | 1.41% | 1.41% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Lab Logistics, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:LabLogisticsLLCMember | whf:LabLogisticsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | |
| Interest Rate | 11.67% | 8.25% | 11.67% | 11.67% | 11.67% | 8.25% | 8.25% | 8.25% | |
| Acquisition Date | Oct. 16, 2019 | Oct. 16, 2019 | |||||||
| Maturity Date | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | |
| Principal/Share Amount | $ 5,131 | $ 5,183 | |||||||
| Investments, amortized cost | 5,124 | 5,166 | |||||||
| Investments, at fair value | $ 5,131 | $ 5,183 | |||||||
| Percent of net assets | 1.54% | 1.48% | 1.54% | 1.54% | 1.54% | 1.48% | 1.48% | 1.48% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Lab Logistics, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:LabLogisticsLLCMember | whf:LabLogisticsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | |
| Interest Rate | 11.67% | 8.25% | 11.67% | 11.67% | 11.67% | 8.25% | 8.25% | 8.25% | |
| Acquisition Date | Oct. 16, 2019 | Oct. 16, 2019 | |||||||
| Maturity Date | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | |
| Principal/Share Amount | $ 5,487 | $ 1,155 | |||||||
| Investments, amortized cost | 5,446 | 1,140 | |||||||
| Investments, at fair value | $ 5,487 | $ 1,155 | |||||||
| Percent of net assets | 1.65% | 0.33% | 1.65% | 1.65% | 1.65% | 0.33% | 0.33% | 0.33% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Lab Logistics, LLC Preferred Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LabLogisticsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | Health Care Services | |||||
| Spread Above Index | 14% | 14% | 14% | 14% | |||||
| PIK interest rate | 14% | 14% | 14% | 14% | |||||
| Acquisition Date | Oct. 29, 2019 | ||||||||
| Principal/Share Amount | $ 2 | ||||||||
| Investments, amortized cost | 857 | ||||||||
| Investments, at fair value | $ 1,018 | ||||||||
| Percent of net assets | 0.29% | 0.29% | 0.29% | 0.29% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Non-income Producing [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Lenny & Larry's, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:LennyLarrysLLCMember | whf:LennyLarrysLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 8.33% | 8.40% | 8.33% | 8.33% | 8.33% | 8.40% | 8.40% | 8.40% | |
| Interest Rate | 12.65% | 9.40% | 12.65% | 12.65% | 12.65% | 9.40% | 9.40% | 9.40% | |
| Investment, interest rate, paid in cash | 10.94% | 7.68% | 10.94% | 10.94% | 10.94% | 7.68% | 7.68% | 7.68% | |
| PIK interest rate | 1.71% | 1.72% | 1.71% | 1.71% | 1.71% | 1.72% | 1.72% | 1.72% | |
| Acquisition Date | May 15, 2018 | May 15, 2018 | |||||||
| Maturity Date | May 15, 2023 | May 15, 2023 | May 15, 2023 | May 15, 2023 | May 15, 2023 | May 15, 2023 | May 15, 2023 | May 15, 2023 | |
| Principal/Share Amount | $ 11,214 | $ 11,142 | |||||||
| Investments, amortized cost | 11,198 | 11,084 | |||||||
| Investments, at fair value | $ 10,941 | $ 10,862 | |||||||
| Percent of net assets | 3.30% | 3.11% | 3.30% | 3.30% | 3.30% | 3.11% | 3.11% | 3.11% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Additional interest for senior term debt | 3% | ||||||||
| Investment, Identifier [Axis]: Leviathan Intermediate Holdco, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LeviathanIntermediateHoldcoLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Interest Rate | 12.54% | 12.54% | 12.54% | 12.54% | |||||
| Acquisition Date | Dec. 27, 2022 | ||||||||
| Maturity Date | Dec. 27, 2027 | Dec. 27, 2027 | Dec. 27, 2027 | Dec. 27, 2027 | |||||
| Principal/Share Amount | $ 78 | ||||||||
| Investments, amortized cost | 76 | ||||||||
| Investments, at fair value | $ 75 | ||||||||
| Percent of net assets | 0.02% | 0.02% | 0.02% | 0.02% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Leviathan Intermediate Holdco, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LeviathanIntermediateHoldcoLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Interest Rate | 12.54% | 12.54% | 12.54% | 12.54% | |||||
| Acquisition Date | Dec. 27, 2022 | ||||||||
| Maturity Date | Dec. 27, 2027 | Dec. 27, 2027 | Dec. 27, 2027 | Dec. 27, 2027 | |||||
| Principal/Share Amount | $ 10,452 | ||||||||
| Investments, amortized cost | 10,139 | ||||||||
| Investments, at fair value | $ 10,138 | ||||||||
| Percent of net assets | 3.05% | 3.05% | 3.05% | 3.05% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Lift Brands, Inc First Lien Secured Term Loan A | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:LiftBrandsIncMember | whf:LiftBrandsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 7.50% | 7.50% | 7.50% | 7.50% | 7.50% | 7.50% | 7.50% | 7.50% | |
| Interest Rate | 11.88% | 8.50% | 11.88% | 11.88% | 11.88% | 8.50% | 8.50% | 8.50% | |
| Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | |||||||
| Maturity Date | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | |
| Principal/Share Amount | $ 5,574 | $ 5,631 | |||||||
| Investments, amortized cost | 5,531 | 5,570 | |||||||
| Investments, at fair value | $ 5,520 | $ 5,546 | |||||||
| Percent of net assets | 1.66% | 1.59% | 1.66% | 1.66% | 1.66% | 1.59% | 1.59% | 1.59% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Lift Brands, Inc First Lien Secured Term Loan B | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:LiftBrandsIncMember | whf:LiftBrandsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | |
| Spread Above Index | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | |
| Interest Rate | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | |
| Investment, interest rate, paid in cash | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | |
| PIK interest rate | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | |
| Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | |||||||
| Maturity Date | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | |
| Principal/Share Amount | $ 1,330 | $ 1,279 | |||||||
| Investments, amortized cost | 1,316 | 1,259 | |||||||
| Investments, at fair value | $ 1,266 | $ 1,239 | |||||||
| Percent of net assets | 0.38% | 0.35% | 0.38% | 0.38% | 0.38% | 0.35% | 0.35% | 0.35% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Luxury Brand Holdings, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:LuxuryBrandHoldingsIncMember | whf:LuxuryBrandHoldingsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.50% | 10% | 6.50% | 6.50% | 6.50% | 10% | 10% | 10% | |
| Interest Rate | 10.91% | 7.50% | 10.91% | 10.91% | 10.91% | 7.50% | 7.50% | 7.50% | |
| Acquisition Date | Dec. 04, 2020 | Dec. 04, 2020 | |||||||
| Maturity Date | Jun. 04, 2026 | Jun. 04, 2026 | Jun. 04, 2026 | Jun. 04, 2026 | Jun. 04, 2026 | Jun. 04, 2026 | Jun. 04, 2026 | Jun. 04, 2026 | |
| Principal/Share Amount | $ 5,880 | $ 5,940 | |||||||
| Investments, amortized cost | 5,807 | 5,844 | |||||||
| Investments, at fair value | $ 5,880 | $ 5,940 | |||||||
| Percent of net assets | 1.77% | 1.70% | 1.77% | 1.77% | 1.77% | 1.70% | 1.70% | 1.70% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: MBS Highway, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MbsHighwayLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Interest Rate | 11.92% | 11.92% | 11.92% | 11.92% | |||||
| Acquisition Date | Oct. 13, 2022 | ||||||||
| Maturity Date | Oct. 13, 2027 | Oct. 13, 2027 | Oct. 13, 2027 | Oct. 13, 2027 | |||||
| Principal/Share Amount | $ 9,476 | ||||||||
| Investments, amortized cost | 9,250 | ||||||||
| Investments, at fair value | $ 9,250 | ||||||||
| Percent of net assets | 2.78% | 2.78% | 2.78% | 2.78% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: MEP-TS Midco, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MEP-TSMidcoLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 10.38% | 10.38% | 10.38% | 10.38% | |||||
| Acquisition Date | Jan. 21, 2021 | ||||||||
| Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Investments, at fair value | $ 22 | ||||||||
| Investment, Identifier [Axis]: MEP-TS Midco, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MEP-TSMidcoLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 10.38% | 10.38% | 10.38% | 10.38% | |||||
| Acquisition Date | Jan. 21, 2021 | ||||||||
| Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Principal/Share Amount | $ 13,353 | ||||||||
| Investments, amortized cost | 13,162 | ||||||||
| Investments, at fair value | $ 13,353 | ||||||||
| Investment, Identifier [Axis]: MEP-TS Midco, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/31/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MEP-TSMidcoLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Jan. 21, 2021 | ||||||||
| Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Investments, at fair value | $ 28 | ||||||||
| Investment, Identifier [Axis]: MEP-TS Midco, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/31/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MEP-TSMidcoLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Jan. 21, 2021 | ||||||||
| Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Principal/Share Amount | $ 13,490 | ||||||||
| Investments, amortized cost | 13,247 | ||||||||
| Investments, at fair value | $ 13,490 | ||||||||
| Investment, Identifier [Axis]: MSI Information Services, Inc First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MSIInformationServicesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Interactive Media & Services | Interactive Media & Services | Interactive Media & Services | Interactive Media & Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Interest Rate | 12.17% | 12.17% | 12.17% | 12.17% | |||||
| Acquisition Date | Apr. 25, 2022 | ||||||||
| Maturity Date | Apr. 24, 2026 | Apr. 24, 2026 | Apr. 24, 2026 | Apr. 24, 2026 | |||||
| Investments, at fair value | $ (9) | ||||||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: MSI Information Services, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MSIInformationServicesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Interactive Media & Services | Interactive Media & Services | Interactive Media & Services | Interactive Media & Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Interest Rate | 12.17% | 12.17% | 12.17% | 12.17% | |||||
| Acquisition Date | Apr. 25, 2022 | ||||||||
| Maturity Date | Apr. 24, 2026 | Apr. 24, 2026 | Apr. 24, 2026 | Apr. 24, 2026 | |||||
| Principal/Share Amount | $ 7,751 | ||||||||
| Investments, amortized cost | 7,623 | ||||||||
| Investments, at fair value | $ 7,554 | ||||||||
| Percent of net assets | 2.27% | 2.27% | 2.27% | 2.27% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Manchester Acquisition Sub LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:ManchesterAcquisitionSubLLCMember | whf:ManchesterAcquisitionSubLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Chemicals | Diversified Chemicals | Diversified Chemicals | Diversified Chemicals | Diversified Chemicals | Diversified Chemicals | Diversified Chemicals | Diversified Chemicals | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Floor | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | |
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | |
| Interest Rate | 10.30% | 6.50% | 10.30% | 10.30% | 10.30% | 6.50% | 6.50% | 6.50% | |
| Acquisition Date | Nov. 16, 2021 | Nov. 16, 2021 | |||||||
| Maturity Date | Nov. 16, 2026 | Nov. 16, 2026 | Nov. 16, 2026 | Nov. 16, 2026 | Nov. 16, 2026 | Nov. 16, 2026 | Nov. 16, 2026 | Nov. 16, 2026 | |
| Principal/Share Amount | $ 7,920 | $ 12,000 | |||||||
| Investments, amortized cost | 7,578 | 11,348 | |||||||
| Investments, at fair value | $ 6,731 | $ 11,340 | |||||||
| Percent of net assets | 2.03% | 3.24% | 2.03% | 2.03% | 2.03% | 3.24% | 3.24% | 3.24% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Marlin DTC-LS Midco 2, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MarlinDTC-LSMidco2LLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | Aug. 06, 2021 | ||||||||
| Maturity Date | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | |||||
| Principal/Share Amount | $ 4,277 | ||||||||
| Investments, amortized cost | 4,200 | ||||||||
| Investments, at fair value | $ 4,206 | ||||||||
| Percent of net assets | 1.20% | 1.20% | 1.20% | 1.20% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Marlin DTC-LS Midco 2, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 7/1/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MarlinDTC-LSMidco2LLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | Jul. 19, 2019 | ||||||||
| Maturity Date | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | |||||
| Investments, at fair value | $ 11 | ||||||||
| Investment, Identifier [Axis]: Marlin DTC-LS Midco 2, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 7/1/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MarlinDTC-LSMidco2LLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | Jul. 19, 2019 | ||||||||
| Maturity Date | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | |||||
| Principal/Share Amount | $ 15,342 | ||||||||
| Investments, amortized cost | 15,153 | ||||||||
| Investments, at fair value | $ 15,342 | ||||||||
| Investment, Identifier [Axis]: Marlin DTC-LS Midco 2., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.23%, Due 7/1/25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MarlinDTC-LSMidco2LLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Acquisition Date | Jul. 19, 2019 | ||||||||
| Maturity Date | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | |||||
| Investments, at fair value | $ 8 | ||||||||
| Investment, Identifier [Axis]: Marlin DTC-LS Midco 2., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.23%, Due 7/1/25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MarlinDTC-LSMidco2LLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Acquisition Date | Jul. 19, 2019 | ||||||||
| Maturity Date | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | |||||
| Principal/Share Amount | $ 19,105 | ||||||||
| Investments, amortized cost | 18,920 | ||||||||
| Investments, at fair value | $ 19,105 | ||||||||
| Investment, Identifier [Axis]: Max Solutions Inc. Common Stock | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MaxSolutionsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Paper Packaging | Paper Packaging | Paper Packaging | Paper Packaging | |||||
| Acquisition Date | Sep. 29, 2022 | ||||||||
| Principal/Share Amount | $ 4 | ||||||||
| Investments, amortized cost | 400 | ||||||||
| Investments, at fair value | $ 283 | ||||||||
| Percent of net assets | 0.09% | 0.09% | 0.09% | 0.09% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Non-income Producing [true false] | false | false | false | false | |||||
| Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.23%, Due 9/29/28 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MaxSolutionsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Paper Packaging | Paper Packaging | Paper Packaging | Paper Packaging | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Acquisition Date | Oct. 07, 2022 | ||||||||
| Maturity Date | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | |||||
| Investments, at fair value | $ (26) | ||||||||
| Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Revolving Loan, Floor 1.00%, Spread CDOR plus 6.50%, Rate 11.23%, Due 9/29/28 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MaxSolutionsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Paper Packaging | Paper Packaging | Paper Packaging | Paper Packaging | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Acquisition Date | Oct. 07, 2022 | ||||||||
| Maturity Date | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | |||||
| Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.23%, Due 9/29/28 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MaxSolutionsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Paper Packaging | Paper Packaging | Paper Packaging | Paper Packaging | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Acquisition Date | Oct. 07, 2022 | ||||||||
| Maturity Date | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | |||||
| Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.23%, Due 9/29/28 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MaxSolutionsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Paper Packaging | Paper Packaging | Paper Packaging | Paper Packaging | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Acquisition Date | Oct. 07, 2022 | ||||||||
| Maturity Date | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | |||||
| Principal/Share Amount | $ 8,244 | ||||||||
| Investments, amortized cost | 8,085 | ||||||||
| Investments, at fair value | $ 8,085 | ||||||||
| Investment, Identifier [Axis]: Maxitransfers Blocker Corp First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MaxitransfersBlockerCorpMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Consumer Finance | Consumer Finance | Consumer Finance | Consumer Finance | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 8.50% | 8.50% | 8.50% | 8.50% | |||||
| Interest Rate | 9.50% | 9.50% | 9.50% | 9.50% | |||||
| Acquisition Date | Oct. 07, 2020 | ||||||||
| Maturity Date | Oct. 07, 2025 | Oct. 07, 2025 | Oct. 07, 2025 | Oct. 07, 2025 | |||||
| Principal/Share Amount | $ 1,038 | ||||||||
| Investments, amortized cost | 1,019 | ||||||||
| Investments, at fair value | $ 1,038 | ||||||||
| Percent of net assets | 0.30% | 0.30% | 0.30% | 0.30% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Maxitransfers Blocker Corp First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MaxitransfersBlockerCorpMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Consumer Finance | Consumer Finance | Consumer Finance | Consumer Finance | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 8.50% | 8.50% | 8.50% | 8.50% | |||||
| Interest Rate | 9.50% | 9.50% | 9.50% | 9.50% | |||||
| Acquisition Date | Oct. 07, 2020 | ||||||||
| Maturity Date | Oct. 07, 2025 | Oct. 07, 2025 | Oct. 07, 2025 | Oct. 07, 2025 | |||||
| Principal/Share Amount | $ 8,590 | ||||||||
| Investments, amortized cost | 8,436 | ||||||||
| Investments, at fair value | $ 8,590 | ||||||||
| Percent of net assets | 2.46% | 2.46% | 2.46% | 2.46% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Meta Buyer LLC, First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 11/1/2027 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MetaBuyerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Dec. 16, 2021 | ||||||||
| Maturity Date | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | |||||
| Investment, Identifier [Axis]: Meta Buyer LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 11/1/2027 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MetaBuyerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Dec. 16, 2021 | ||||||||
| Maturity Date | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | |||||
| Principal/Share Amount | $ 251 | ||||||||
| Investments, amortized cost | 246 | ||||||||
| Investments, at fair value | $ 246 | ||||||||
| Investment, Identifier [Axis]: Meta Buyer LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 11/1/2027 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MetaBuyerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Dec. 16, 2021 | ||||||||
| Maturity Date | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | |||||
| Principal/Share Amount | $ 991 | ||||||||
| Investments, amortized cost | 972 | ||||||||
| Investments, at fair value | $ 972 | ||||||||
| Investment, Identifier [Axis]: Meta Buyer LLC, First lien Secured Term Loan, Floor 1.00%, Spread E plus 6.00%, Rate 7.00%, Due 11/1/2027 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MetaBuyerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whf:EuroInterbankOfferedRateMember | whf:EuroInterbankOfferedRateMember | whf:EuroInterbankOfferedRateMember | whf:EuroInterbankOfferedRateMember | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Dec. 16, 2021 | ||||||||
| Maturity Date | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | |||||
| Principal/Share Amount | € | € 12,411 | ||||||||
| Investments, amortized cost | $ 13,737 | ||||||||
| Investments, at fair value | $ 13,843 | ||||||||
| Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF plus 6.00%, Rate 10.81%, Due 11/1/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MetaBuyerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 10.81% | 10.81% | 10.81% | 10.81% | |||||
| Acquisition Date | Oct. 01, 2022 | ||||||||
| Maturity Date | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | |||||
| Principal/Share Amount | $ 892 | ||||||||
| Investments, amortized cost | 878 | ||||||||
| Investments, at fair value | $ 876 | ||||||||
| Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 6.00%, Rate 10.81%, Due 11/1/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MetaBuyerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 10.81% | 10.81% | 10.81% | 10.81% | |||||
| Acquisition Date | Dec. 16, 2021 | ||||||||
| Maturity Date | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | |||||
| Investments, at fair value | $ (3) | ||||||||
| Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Term Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 8.17%, Due 11/20/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MetaBuyerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whf:EuroInterbankOfferedRateMember | whf:EuroInterbankOfferedRateMember | whf:EuroInterbankOfferedRateMember | whf:EuroInterbankOfferedRateMember | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 8.17% | 8.17% | 8.17% | 8.17% | |||||
| Acquisition Date | Dec. 16, 2021 | ||||||||
| Maturity Date | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | |||||
| Principal/Share Amount | € | € 12,287 | ||||||||
| Investments, amortized cost | $ 13,643 | ||||||||
| Investments, at fair value | $ 12,876 | ||||||||
| Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.00%, Rate 10.62%, Due 11/1/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MetaBuyerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | Pharmaceuticals [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 10.62% | 10.62% | 10.62% | 10.62% | |||||
| Acquisition Date | Dec. 16, 2021 | ||||||||
| Maturity Date | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | |||||
| Principal/Share Amount | $ 981 | ||||||||
| Investments, amortized cost | 966 | ||||||||
| Investments, at fair value | $ 963 | ||||||||
| Investment, Identifier [Axis]: Mikawaya Holdings, LLC, First Lien Secured Term Loan, Floor 1.25%, Spread L plus 5.50%, Rate 6.75%, Due 1/29/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MikawayaHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1.25% | 1.25% | 1.25% | 1.25% | |||||
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | |||||
| Interest Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Acquisition Date | Feb. 18, 2020 | ||||||||
| Maturity Date | Jan. 29, 2025 | Jan. 29, 2025 | Jan. 29, 2025 | Jan. 29, 2025 | |||||
| Principal/Share Amount | $ 3,026 | ||||||||
| Investments, amortized cost | 2,988 | ||||||||
| Investments, at fair value | $ 3,026 | ||||||||
| Investment, Identifier [Axis]: Mills Fleet Farm Group, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MillsFleetFarmGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Department Stores | Department Stores | Department Stores | Department Stores | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Acquisition Date | Oct. 24, 2018 | ||||||||
| Maturity Date | Oct. 24, 2024 | Oct. 24, 2024 | Oct. 24, 2024 | Oct. 24, 2024 | |||||
| Principal/Share Amount | $ 13,538 | ||||||||
| Investments, amortized cost | 13,331 | ||||||||
| Investments, at fair value | $ 13,538 | ||||||||
| Percent of net assets | 3.87% | 3.87% | 3.87% | 3.87% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Motivational CIV, LLC Class B Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:MotivationalCIVLLCMember | whf:MotivationalCIVLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:ClassBUnitsMember | whf:ClassBUnitsMember | whf:ClassBUnitsMember | whf:ClassBUnitsMember | whf:ClassBUnitsMember | whf:ClassBUnitsMember | whf:ClassBUnitsMember | whf:ClassBUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |
| Acquisition Date | Jul. 12, 2021 | Jul. 12, 2021 | |||||||
| Principal/Share Amount | $ 1,250 | $ 1,250 | |||||||
| Investments, amortized cost | 1,250 | 1,250 | |||||||
| Investments, at fair value | $ 517 | $ 1,250 | |||||||
| Percent of net assets | 0.16% | 0.36% | 0.16% | 0.16% | 0.16% | 0.36% | 0.36% | 0.36% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | false | false | false | false | false | |
| Investment, Identifier [Axis]: Motivational Marketing, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:MotivationalMarketingLLCMember | whf:MotivationalMarketingLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:BaseRateMember | London Interbank Offered Rate (LIBOR) [Member] | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 5.56% | 6.25% | 5.56% | 5.56% | 5.56% | 6.25% | 6.25% | 6.25% | |
| Interest Rate | 11.21% | 7.25% | 11.21% | 11.21% | 11.21% | 7.25% | 7.25% | 7.25% | |
| Acquisition Date | Jul. 12, 2021 | Jul. 12, 2021 | |||||||
| Maturity Date | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | |
| Principal/Share Amount | $ 158 | ||||||||
| Investments, amortized cost | 155 | ||||||||
| Investments, at fair value | $ 133 | $ 7 | |||||||
| Percent of net assets | 0.04% | 0.04% | 0.04% | 0.04% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Motivational Marketing, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:MotivationalMarketingLLCMember | whf:MotivationalMarketingLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Interest Rate | 10.59% | 7.25% | 10.59% | 10.59% | 10.59% | 7.25% | 7.25% | 7.25% | |
| Acquisition Date | Jul. 12, 2021 | Jul. 12, 2021 | |||||||
| Maturity Date | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | |
| Principal/Share Amount | $ 11,113 | $ 11,789 | |||||||
| Investments, amortized cost | 10,956 | 11,575 | |||||||
| Investments, at fair value | $ 10,749 | $ 11,646 | |||||||
| Percent of net assets | 3.23% | 3.33% | 3.23% | 3.23% | 3.23% | 3.33% | 3.33% | 3.33% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: NMFC Senior Loan Program I LLC Units, Equity | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:NmfcSeniorLoanProgramILlcUnitsMember | ||||||||
| Investment, Type [Extensible Enumeration] | Equity Investments | Equity Investments | Equity Investments | Equity Investments | |||||
| Investments, at fair value | 9,269 | ||||||||
| Investment, Identifier [Axis]: NNA Services, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:NNAServicesLLCMember | whf:NNAServicesLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | |
| Interest Rate | 11.48% | 7.75% | 11.48% | 11.48% | 11.48% | 7.75% | 7.75% | 7.75% | |
| Acquisition Date | Aug. 27, 2021 | Aug. 27, 2021 | |||||||
| Maturity Date | Aug. 27, 2026 | Aug. 27, 2026 | Aug. 27, 2026 | Aug. 27, 2026 | Aug. 27, 2026 | Aug. 27, 2026 | Aug. 27, 2026 | Aug. 27, 2026 | |
| Principal/Share Amount | $ 11,302 | $ 11,594 | |||||||
| Investments, amortized cost | 11,199 | 11,459 | |||||||
| Investments, at fair value | $ 10,833 | $ 11,460 | |||||||
| Percent of net assets | 3.26% | 3.28% | 3.26% | 3.26% | 3.26% | 3.28% | 3.28% | 3.28% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 10.92%, Due 1/21/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:NPAVLessorCorp.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 10.92% | 10.92% | 10.92% | 10.92% | |||||
| Acquisition Date | Mar. 01, 2022 | ||||||||
| Maturity Date | Jan. 21, 2027 | Jan. 21, 2027 | Jan. 21, 2027 | Jan. 21, 2027 | |||||
| Principal/Share Amount | $ 290 | ||||||||
| Investments, amortized cost | 285 | ||||||||
| Investments, at fair value | $ 247 | ||||||||
| Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 10.92%, Due 1/21/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:NPAVLessorCorp.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 10.92% | 10.92% | 10.92% | 10.92% | |||||
| Acquisition Date | Mar. 01, 2022 | ||||||||
| Maturity Date | Jan. 21, 2027 | Jan. 21, 2027 | Jan. 21, 2027 | Jan. 21, 2027 | |||||
| Principal/Share Amount | $ 8,924 | ||||||||
| Investments, amortized cost | 8,778 | ||||||||
| Investments, at fair value | $ 8,301 | ||||||||
| Investment, Identifier [Axis]: Naviga Inc First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:NavigaIncMember | whf:NavigaIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:BaseRateMember | London Interbank Offered Rate (LIBOR) [Member] | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.63% | 7% | 6.63% | 6.63% | 6.63% | 7% | 7% | 7% | |
| Interest Rate | 12.19% | 8% | 12.19% | 12.19% | 12.19% | 8% | 8% | 8% | |
| Acquisition Date | Oct. 06, 2022 | Jun. 14, 2019 | |||||||
| Maturity Date | Dec. 29, 2023 | Dec. 29, 2022 | Dec. 29, 2023 | Dec. 29, 2023 | Dec. 29, 2023 | Dec. 29, 2022 | Dec. 29, 2022 | Dec. 29, 2022 | |
| Principal/Share Amount | $ 267 | $ 169 | |||||||
| Investments, amortized cost | 267 | 168 | |||||||
| Investments, at fair value | $ 258 | $ 169 | |||||||
| Percent of net assets | 0.08% | 0.05% | 0.08% | 0.08% | 0.08% | 0.05% | 0.05% | 0.05% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Naviga Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:NavigaIncMember | whf:NavigaIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 7% | 7% | 7% | 7% | 7% | 7% | 7% | 7% | |
| Interest Rate | 11.68% | 8% | 11.68% | 11.68% | 11.68% | 8% | 8% | 8% | |
| Acquisition Date | Oct. 06, 2022 | Jun. 14, 2019 | |||||||
| Maturity Date | Dec. 29, 2023 | Dec. 29, 2022 | Dec. 29, 2023 | Dec. 29, 2023 | Dec. 29, 2023 | Dec. 29, 2022 | Dec. 29, 2022 | Dec. 29, 2022 | |
| Principal/Share Amount | $ 3,180 | $ 3,213 | |||||||
| Investments, amortized cost | 3,177 | 3,195 | |||||||
| Investments, at fair value | $ 3,084 | $ 3,213 | |||||||
| Percent of net assets | 0.93% | 0.92% | 0.93% | 0.93% | 0.93% | 0.92% | 0.92% | 0.92% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Nelson Worldwide, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:NelsonWorldwideLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 10.25% | 10.25% | 10.25% | 10.25% | |||||
| Interest Rate | 11.25% | 11.25% | 11.25% | 11.25% | |||||
| Investment, interest rate, paid in cash | 10.25% | 10.25% | 10.25% | 10.25% | |||||
| PIK interest rate | 1% | 1% | 1% | 1% | |||||
| Acquisition Date | Jan. 09, 2018 | ||||||||
| Maturity Date | Jan. 09, 2023 | Jan. 09, 2023 | Jan. 09, 2023 | Jan. 09, 2023 | |||||
| Principal/Share Amount | $ 10,027 | ||||||||
| Investments, amortized cost | 9,976 | ||||||||
| Investments, at fair value | $ 9,826 | ||||||||
| Percent of net assets | 2.81% | 2.81% | 2.81% | 2.81% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: PFB Holdco, Inc Class A Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:PFBHoldcoIncMember | whf:PFBHoldcoIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Data Processing & Outsourced Services | Building Products | Building Products | Building Products | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |
| Acquisition Date | Dec. 17, 2021 | Dec. 17, 2021 | |||||||
| Principal/Share Amount | $ 1 | $ 1 | |||||||
| Investments, amortized cost | 423 | 423 | |||||||
| Investments, at fair value | $ 786 | $ 427 | |||||||
| Percent of net assets | 0.24% | 0.12% | 0.24% | 0.24% | 0.24% | 0.12% | 0.12% | 0.12% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | false | false | false | false | false | |
| Investment, Identifier [Axis]: PFB Holdco, Inc First Lien Secured Revolving Loan Floor 2.45 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:PFBHoldcoIncMember | whf:PFBHoldcoIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Dollar Offered Rate | whf:CanadaPrimeRateMember | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | whf:CanadaPrimeRateMember | whf:CanadaPrimeRateMember | whf:CanadaPrimeRateMember | |
| Floor | 1% | 2.45% | 1% | 1% | 1% | 2.45% | 2.45% | 2.45% | |
| Spread Above Index | 6% | 5.50% | 6% | 6% | 6% | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 10.52% | 7.95% | 10.52% | 10.52% | 10.52% | 7.95% | 7.95% | 7.95% | |
| Acquisition Date | Dec. 17, 2021 | Dec. 17, 2021 | |||||||
| Maturity Date | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | |
| Investments, at fair value | $ 2 | ||||||||
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: PFB Holdco, Inc First Lien Secured Revolving Loan Floor 3.25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:PFBHoldcoIncMember | whf:PFBHoldcoIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | us-gaap:PrimeRateMember | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | |
| Floor | 1% | 3.25% | 1% | 1% | 1% | 3.25% | 3.25% | 3.25% | |
| Spread Above Index | 6% | 5.50% | 6% | 6% | 6% | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 10.17% | 8.75% | 10.17% | 10.17% | 10.17% | 8.75% | 8.75% | 8.75% | |
| Acquisition Date | Dec. 17, 2021 | Dec. 17, 2021 | |||||||
| Maturity Date | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: PFB Holdco, Inc First Lien Secured Term Loan Floor 2.45 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:PFBHoldcoIncMember | whf:PFBHoldcoIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Dollar Offered Rate | whf:CanadaPrimeRateMember | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | whf:CanadaPrimeRateMember | whf:CanadaPrimeRateMember | whf:CanadaPrimeRateMember | |
| Floor | 1% | 2.45% | 1% | 1% | 1% | 2.45% | 2.45% | 2.45% | |
| Spread Above Index | 6% | 5.50% | 6% | 6% | 6% | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 10.52% | 7.95% | 10.52% | 10.52% | 10.52% | 7.95% | 7.95% | 7.95% | |
| Acquisition Date | Dec. 17, 2021 | Dec. 17, 2021 | |||||||
| Maturity Date | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | |
| Principal/Share Amount | $ 8,935 | $ 9,027 | |||||||
| Investments, amortized cost | 6,879 | 6,923 | |||||||
| Investments, at fair value | $ 6,504 | $ 6,998 | |||||||
| Percent of net assets | 1.95% | 2% | 1.95% | 1.95% | 1.95% | 2% | 2% | 2% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: PFB Holdco, Inc First Lien Secured Term Loan Floor 3.25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:PFBHoldcoIncMember | whf:PFBHoldcoIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | us-gaap:PrimeRateMember | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | |
| Floor | 1% | 3.25% | 1% | 1% | 1% | 3.25% | 3.25% | 3.25% | |
| Spread Above Index | 6% | 5.50% | 6% | 6% | 6% | 5.50% | 5.50% | 5.50% | |
| Interest Rate | 10.17% | 8.75% | 10.17% | 10.17% | 10.17% | 8.75% | 8.75% | 8.75% | |
| Acquisition Date | Dec. 17, 2021 | Dec. 17, 2021 | |||||||
| Maturity Date | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | |
| Principal/Share Amount | $ 2,176 | $ 2,198 | |||||||
| Investments, amortized cost | 2,141 | 2,154 | |||||||
| Investments, at fair value | $ 2,144 | $ 2,154 | |||||||
| Percent of net assets | 0.65% | 0.62% | 0.65% | 0.65% | 0.65% | 0.62% | 0.62% | 0.62% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: PG Dental New Jersey Parent, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:PGDentalNewJerseyParentLLCMember | whf:PGDentalNewJerseyParentLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 8.25% | 9.25% | 8.25% | 8.25% | 8.25% | 9.25% | 9.25% | 9.25% | |
| Interest Rate | 12.57% | 10.25% | 12.57% | 12.57% | 12.57% | 10.25% | 10.25% | 10.25% | |
| Investment, interest rate, paid in cash | 11.82% | 8.75% | 11.82% | 11.82% | 11.82% | 8.75% | 8.75% | 8.75% | |
| PIK interest rate | 0.75% | 1.50% | 0.75% | 0.75% | 0.75% | 1.50% | 1.50% | 1.50% | |
| Acquisition Date | Nov. 25, 2020 | Nov. 25, 2020 | |||||||
| Maturity Date | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | |
| Principal/Share Amount | $ 352 | $ 702 | |||||||
| Investments, amortized cost | 347 | 689 | |||||||
| Investments, at fair value | $ 300 | $ 631 | |||||||
| Percent of net assets | 0.09% | 0.18% | 0.09% | 0.09% | 0.09% | 0.18% | 0.18% | 0.18% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: PG Dental New Jersey Parent, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:PGDentalNewJerseyParentLLCMember | whf:PGDentalNewJerseyParentLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | Health Care Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 9% | 9.25% | 9% | 9% | 9% | 9.25% | 9.25% | 9.25% | |
| Interest Rate | 13.32% | 10.25% | 13.32% | 13.32% | 13.32% | 10.25% | 10.25% | 10.25% | |
| Investment, interest rate, paid in cash | 12.57% | 8.75% | 12.57% | 12.57% | 12.57% | 8.75% | 8.75% | 8.75% | |
| PIK interest rate | 0.75% | 1.50% | 0.75% | 0.75% | 0.75% | 1.50% | 1.50% | 1.50% | |
| Acquisition Date | Nov. 25, 2020 | Nov. 25, 2020 | |||||||
| Maturity Date | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | |
| Principal/Share Amount | $ 13,495 | $ 15,448 | |||||||
| Investments, amortized cost | 13,324 | 15,178 | |||||||
| Investments, at fair value | $ 12,415 | $ 14,212 | |||||||
| Percent of net assets | 3.74% | 4.06% | 3.74% | 3.74% | 3.74% | 4.06% | 4.06% | 4.06% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: PPS CR Acquisition, Inc First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PPSCRAcquisitionIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Heavy Electrical Equipment | Heavy Electrical Equipment | Heavy Electrical Equipment | Heavy Electrical Equipment | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Interest Rate | 10.98% | 10.98% | 10.98% | 10.98% | |||||
| Acquisition Date | Jul. 11, 2022 | ||||||||
| Maturity Date | Jun. 25, 2026 | Jun. 25, 2026 | Jun. 25, 2026 | Jun. 25, 2026 | |||||
| Investments, at fair value | $ (34) | ||||||||
| Percent of net assets | (0.01%) | (0.01%) | (0.01%) | (0.01%) | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: PPS CR Acquisition, Inc First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:PPSCRAcquisitionIncMember | whf:PPSCRAcquisitionIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Heavy Electrical Equipment | Heavy Electrical Equipment | Heavy Electrical Equipment | Heavy Electrical Equipment | Heavy Electrical Equipment | Heavy Electrical Equipment | Heavy Electrical Equipment | Heavy Electrical Equipment | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:BaseRateMember | London Interbank Offered Rate (LIBOR) [Member] | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 5.96% | 5.96% | 5.96% | 5.96% | |||||
| Interest Rate | 11.36% | 7.25% | 11.36% | 11.36% | 11.36% | 7.25% | 7.25% | 7.25% | |
| Acquisition Date | Jun. 25, 2021 | Jun. 25, 2021 | |||||||
| Maturity Date | Jun. 25, 2024 | Jun. 25, 2024 | Jun. 25, 2024 | Jun. 25, 2024 | Jun. 25, 2024 | Jun. 25, 2024 | Jun. 25, 2024 | Jun. 25, 2024 | |
| Principal/Share Amount | $ 836 | $ 104 | |||||||
| Investments, amortized cost | 828 | 103 | |||||||
| Investments, at fair value | $ 780 | $ 113 | |||||||
| Percent of net assets | 0.23% | 0.03% | 0.23% | 0.23% | 0.23% | 0.03% | 0.03% | 0.03% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: PPS CR Acquisition, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:PPSCRAcquisitionIncMember | whf:PPSCRAcquisitionIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Heavy Electrical Equipment | Heavy Electrical Equipment | Heavy Electrical Equipment | Heavy Electrical Equipment | Heavy Electrical Equipment | Heavy Electrical Equipment | Heavy Electrical Equipment | Heavy Electrical Equipment | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Interest Rate | 10.98% | 7.25% | 10.98% | 10.98% | 10.98% | 7.25% | 7.25% | 7.25% | |
| Acquisition Date | Jun. 25, 2021 | Jun. 25, 2021 | |||||||
| Maturity Date | Jun. 25, 2026 | Jun. 25, 2026 | Jun. 25, 2026 | Jun. 25, 2026 | Jun. 25, 2026 | Jun. 25, 2026 | Jun. 25, 2026 | Jun. 25, 2026 | |
| Principal/Share Amount | $ 14,130 | $ 11,123 | |||||||
| Investments, amortized cost | 13,922 | 10,924 | |||||||
| Investments, at fair value | $ 13,774 | $ 10,975 | |||||||
| Percent of net assets | 4.14% | 3.14% | 4.14% | 4.14% | 4.14% | 3.14% | 3.14% | 3.14% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: PS Lightwave, Inc., First Lien Secured Delayed Draw Loan, Floor 1.50%, Spread L plus 6.75%, Rate 8.25%, Due 3/10/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PSLightwaveInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Interest Rate | 8.25% | 8.25% | 8.25% | 8.25% | |||||
| Acquisition Date | May 19, 2020 | ||||||||
| Maturity Date | Mar. 10, 2025 | Mar. 10, 2025 | Mar. 10, 2025 | Mar. 10, 2025 | |||||
| Investments, at fair value | $ 5 | ||||||||
| Investment, Identifier [Axis]: PS Lightwave, Inc., First Lien Secured Term Loan, Floor 1.50%, Spread L plus 6.75%, Rate 8.25%, Due 3/10/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PSLightwaveInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Interest Rate | 8.25% | 8.25% | 8.25% | 8.25% | |||||
| Acquisition Date | May 19, 2020 | ||||||||
| Maturity Date | Mar. 10, 2025 | Mar. 10, 2025 | Mar. 10, 2025 | Mar. 10, 2025 | |||||
| Principal/Share Amount | $ 7,304 | ||||||||
| Investments, amortized cost | 7,207 | ||||||||
| Investments, at fair value | $ 7,230 | ||||||||
| Investment, Identifier [Axis]: Patagonia Hold co Llc First Lien Secured Term Loans | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PatagoniaHoldcoLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Alternative Carriers | Alternative Carriers | Alternative Carriers | Alternative Carriers | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Spread Above Index | 5.75% | 5.75% | 5.75% | 5.75% | |||||
| Interest Rate | 9.96% | 9.96% | 9.96% | 9.96% | |||||
| Acquisition Date | Aug. 05, 2022 | ||||||||
| Maturity Date | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | |||||
| Principal/Share Amount | $ 14,588 | ||||||||
| Investments, amortized cost | 12,105 | ||||||||
| Investments, at fair value | $ 12,068 | ||||||||
| Percent of net assets | 3.63% | 3.63% | 3.63% | 3.63% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Pennsylvania Machine Works., First Lien Secured Term Loan, Floor 1.00%, Spread SF plus 6.25%, Rate 11.09%, Due 3/8/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PennsylvaniaMachineWorksLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery | Industrial Machinery | Industrial Machinery | Industrial Machinery | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 11.09% | 11.09% | 11.09% | 11.09% | |||||
| Acquisition Date | Mar. 25, 2022 | ||||||||
| Maturity Date | Mar. 08, 2027 | Mar. 08, 2027 | Mar. 08, 2027 | Mar. 08, 2027 | |||||
| Principal/Share Amount | $ 6,907 | ||||||||
| Investments, amortized cost | 6,821 | ||||||||
| Investments, at fair value | $ 6,801 | ||||||||
| Investment, Identifier [Axis]: PlayMonster LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | PlayMonster LLC [Member]. | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Jun. 07, 2021 | ||||||||
| Maturity Date | Jun. 07, 2026 | Jun. 07, 2026 | Jun. 07, 2026 | Jun. 07, 2026 | |||||
| Principal/Share Amount | $ 224 | ||||||||
| Investments, amortized cost | 221 | ||||||||
| Investments, at fair value | $ (828) | ||||||||
| Percent of net assets | (0.24%) | (0.24%) | (0.24%) | (0.24%) | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: PlayMonster LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | PlayMonster LLC [Member]. | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Identifier [Axis]: PlayMonster LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | PlayMonster LLC [Member]. | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Jun. 07, 2021 | ||||||||
| Maturity Date | Jun. 07, 2026 | Jun. 07, 2026 | Jun. 07, 2026 | Jun. 07, 2026 | |||||
| Principal/Share Amount | $ 6,000 | ||||||||
| Investments, amortized cost | 5,894 | ||||||||
| Investments, at fair value | $ 3,900 | ||||||||
| Percent of net assets | 1.12% | 1.12% | 1.12% | 1.12% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Playmonster Group Equity Inc Common Equity | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PlaymonsterGroupEquityIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |||||
| Investment, Identifier [Axis]: Playmonster Group Equity Inc Preferred Equity | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PlaymonsterGroupEquityIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | |||||
| Investment, Identifier [Axis]: Playmonster Group Equity, Inc Common Stock | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PlaymonsterGroupEquityIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Acquisition Date | Jan. 24, 2022 | ||||||||
| Principal/Share Amount | $ 72 | ||||||||
| Investments, amortized cost | $ 460 | ||||||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Non-income Producing [true false] | false | false | false | false | |||||
| Investment, Identifier [Axis]: Playmonster Group Equity, Inc. Preferred Stock | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PlaymonsterGroupEquityIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Spread Above Index | 14% | 14% | 14% | 14% | |||||
| PIK interest rate | 14% | 14% | 14% | 14% | |||||
| Acquisition Date | Jan. 24, 2022 | ||||||||
| Principal/Share Amount | $ 36 | ||||||||
| Investments, amortized cost | $ 3,600 | ||||||||
| Percent of net assets | 0.01% | 0.01% | 0.01% | 0.01% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Non-income Producing [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Playmonster Group LLC First Lien Secured Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PlaymonsterGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investments, at fair value | $ 2,977 | ||||||||
| Investment, Identifier [Axis]: Playmonster Group LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PlaymonsterGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 9% | 9% | 9% | 9% | |||||
| PIK interest rate | 13.36% | 13.36% | 13.36% | 13.36% | |||||
| Acquisition Date | Jan. 24, 2022 | ||||||||
| Maturity Date | Jun. 08, 2026 | Jun. 08, 2026 | Jun. 08, 2026 | Jun. 08, 2026 | |||||
| Principal/Share Amount | $ 3,664 | ||||||||
| Investments, amortized cost | 3,664 | ||||||||
| Investments, at fair value | $ 2,977 | ||||||||
| Percent of net assets | 0.90% | 0.90% | 0.90% | 0.90% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Playmonster Group LLC Priority First Lien Secured Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PlaymonsterGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:PriorityFirstLienSecuredLoanMember | whf:PriorityFirstLienSecuredLoanMember | whf:PriorityFirstLienSecuredLoanMember | whf:PriorityFirstLienSecuredLoanMember | |||||
| Investments, at fair value | $ 176 | ||||||||
| Investment, Identifier [Axis]: Playmonster Group LLC, Priority First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PlaymonsterGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:PriorityFirstLienSecuredLoanMember | whf:PriorityFirstLienSecuredLoanMember | whf:PriorityFirstLienSecuredLoanMember | whf:PriorityFirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| PIK interest rate | 11.47% | 11.47% | 11.47% | 11.47% | |||||
| Acquisition Date | Dec. 09, 2022 | ||||||||
| Maturity Date | Jun. 08, 2026 | Jun. 08, 2026 | Jun. 08, 2026 | Jun. 08, 2026 | |||||
| Principal/Share Amount | $ 184 | ||||||||
| Investments, amortized cost | 176 | ||||||||
| Investments, at fair value | $ 176 | ||||||||
| Percent of net assets | 0.05% | 0.05% | 0.05% | 0.05% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Potpourri Group, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:PotpourriGroupIncMember | whf:PotpourriGroupIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | |
| Spread Above Index | 8.25% | 8.25% | 8.25% | 8.25% | 8.25% | 8.25% | 8.25% | 8.25% | |
| Interest Rate | 12.47% | 9.75% | 12.47% | 12.47% | 12.47% | 9.75% | 9.75% | 9.75% | |
| Acquisition Date | Jul. 03, 2019 | Jul. 03, 2019 | |||||||
| Maturity Date | Jul. 03, 2024 | Jul. 03, 2024 | Jul. 03, 2024 | Jul. 03, 2024 | Jul. 03, 2024 | Jul. 03, 2024 | Jul. 03, 2024 | Jul. 03, 2024 | |
| Principal/Share Amount | $ 14,187 | $ 17,148 | |||||||
| Investments, amortized cost | 14,091 | 16,955 | |||||||
| Investments, at fair value | $ 14,187 | $ 17,148 | |||||||
| Percent of net assets | 4.27% | 4.90% | 4.27% | 4.27% | 4.27% | 4.90% | 4.90% | 4.90% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Poultry Holdings LLC (HPP), First Lien Secured Term Loan, Floor 1.00%, Spread L plus 7.25%, Rate 8.25% (6.75% Cash + 1.50% PIK), Due 6/28/225 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PoultryHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Interest Rate | 8.25% | 8.25% | 8.25% | 8.25% | |||||
| Investment, interest rate, paid in cash | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| PIK interest rate | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Acquisition Date | Oct. 21, 2019 | ||||||||
| Maturity Date | Jun. 28, 2025 | Jun. 28, 2025 | Jun. 28, 2025 | Jun. 28, 2025 | |||||
| Principal/Share Amount | $ 7,770 | ||||||||
| Investments, amortized cost | 7,676 | ||||||||
| Investments, at fair value | $ 6,993 | ||||||||
| Investment, Identifier [Axis]: Poultry Holdings LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 7.25%, Rate 11.67% (10.17% Cash + 1.50% PIK), Due 6/28/25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PoultryHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Interest Rate | 11.67% | 11.67% | 11.67% | 11.67% | |||||
| Investment, interest rate, paid in cash | 10.17% | 10.17% | 10.17% | 10.17% | |||||
| PIK interest rate | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Acquisition Date | Oct. 21, 2019 | ||||||||
| Maturity Date | Jun. 28, 2025 | Jun. 28, 2025 | Jun. 28, 2025 | Jun. 28, 2025 | |||||
| Principal/Share Amount | $ 7,162 | ||||||||
| Investments, amortized cost | 7,101 | ||||||||
| Investments, at fair value | $ 7,011 | ||||||||
| Investment, Identifier [Axis]: Project Castle, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ProjectCastleIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery | Industrial Machinery | Industrial Machinery | Industrial Machinery | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | |||||
| Interest Rate | 10.08% | 10.08% | 10.08% | 10.08% | |||||
| Acquisition Date | Jun. 09, 2022 | ||||||||
| Maturity Date | Jun. 01, 2029 | Jun. 01, 2029 | Jun. 01, 2029 | Jun. 01, 2029 | |||||
| Principal/Share Amount | $ 8,355 | ||||||||
| Investments, amortized cost | 7,535 | ||||||||
| Investments, at fair value | $ 7,269 | ||||||||
| Percent of net assets | 2.19% | 2.19% | 2.19% | 2.19% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Quest Events, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:QuestEventsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 10.73% | 10.73% | 10.73% | 10.73% | |||||
| Acquisition Date | Jul. 19, 2019 | ||||||||
| Maturity Date | Dec. 28, 2024 | Dec. 28, 2024 | Dec. 28, 2024 | Dec. 28, 2024 | |||||
| Principal/Share Amount | $ 468 | ||||||||
| Investments, amortized cost | 464 | ||||||||
| Investments, at fair value | $ 431 | ||||||||
| Investment, Identifier [Axis]: Quest Events, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:QuestEventsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 10.73% | 10.73% | 10.73% | 10.73% | |||||
| Acquisition Date | Jul. 19, 2019 | ||||||||
| Maturity Date | Dec. 28, 2024 | Dec. 28, 2024 | Dec. 28, 2024 | Dec. 28, 2024 | |||||
| Principal/Share Amount | $ 11,805 | ||||||||
| Investments, amortized cost | 11,728 | ||||||||
| Investments, at fair value | $ 11,298 | ||||||||
| Investment, Identifier [Axis]: Quest Events, LLC Preferred Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:QuestEventsLLCMember | whf:QuestEventsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | us-gaap:PreferredStockMember | whf:PreferredUnitsMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |
| Acquisition Date | Dec. 28, 2018 | Dec. 28, 2018 | |||||||
| Maturity Date | Dec. 08, 2025 | Dec. 08, 2025 | Dec. 08, 2025 | Dec. 08, 2025 | Dec. 08, 2025 | Dec. 08, 2025 | Dec. 08, 2025 | Dec. 08, 2025 | |
| Principal/Share Amount | $ 347 | $ 317 | |||||||
| Investments, amortized cost | 347 | $ 317 | |||||||
| Investments, at fair value | $ 110 | ||||||||
| Percent of net assets | 0.03% | 0.03% | 0.03% | 0.03% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Non-income Producing [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Quest Events, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/28/2024 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:QuestEventsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Jul. 19, 2019 | ||||||||
| Maturity Date | Dec. 28, 2024 | Dec. 28, 2024 | Dec. 28, 2024 | Dec. 28, 2024 | |||||
| Principal/Share Amount | $ 935 | ||||||||
| Investments, amortized cost | 925 | ||||||||
| Investments, at fair value | $ 760 | ||||||||
| Investment, Identifier [Axis]: Quest Events, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/28/2024 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:QuestEventsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Jul. 19, 2019 | ||||||||
| Maturity Date | Dec. 28, 2024 | Dec. 28, 2024 | Dec. 28, 2024 | Dec. 28, 2024 | |||||
| Principal/Share Amount | $ 11,966 | ||||||||
| Investments, amortized cost | 11,848 | ||||||||
| Investments, at fair value | $ 9,729 | ||||||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC , First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.25%, Rate 7.25%, Due 12/31/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RCKCAcquisitionsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Acquisition Date | Jan. 27, 2021 | ||||||||
| Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Investments, at fair value | $ (5) | ||||||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC , First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.25%, Rate 7.25%, Due 12/31/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RCKCAcquisitionsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Acquisition Date | Jan. 27, 2021 | ||||||||
| Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Principal/Share Amount | $ 818 | ||||||||
| Investments, amortized cost | 804 | ||||||||
| Investments, at fair value | $ 814 | ||||||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC , First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 7.25%, Due 12/312026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RCKCAcquisitionsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Acquisition Date | Jan. 27, 2021 | ||||||||
| Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Principal/Share Amount | $ 11,264 | ||||||||
| Investments, amortized cost | 11,074 | ||||||||
| Investments, at fair value | $ 11,151 | ||||||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.25%, Rate 10.64%, Due 12/31/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RCKCAcquisitionsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 10.65% | 10.65% | 10.65% | 10.65% | |||||
| Acquisition Date | Jan. 27, 2021 | ||||||||
| Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Principal/Share Amount | $ 3,007 | ||||||||
| Investments, amortized cost | 2,963 | ||||||||
| Investments, at fair value | $ 2,947 | ||||||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.25%, Rate 10.57%, Due 12/31/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RCKCAcquisitionsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 10.60% | 10.60% | 10.60% | 10.60% | |||||
| Acquisition Date | Jan. 27, 2021 | ||||||||
| Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Principal/Share Amount | $ 533 | ||||||||
| Investments, amortized cost | 526 | ||||||||
| Investments, at fair value | $ 517 | ||||||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 10.98%, Due 12/31/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RCKCAcquisitionsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 10.98% | 10.98% | 10.98% | 10.98% | |||||
| Acquisition Date | Jan. 27, 2021 | ||||||||
| Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Principal/Share Amount | $ 11,150 | ||||||||
| Investments, amortized cost | 11,000 | ||||||||
| Investments, at fair value | $ 10,929 | ||||||||
| Investment, Identifier [Axis]: RLJ Pro-Vac, Inc. First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RLJPro-VacInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Acquisition Date | Dec. 31, 2021 | ||||||||
| Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Principal/Share Amount | $ 8,775 | ||||||||
| Investments, amortized cost | 8,600 | ||||||||
| Investments, at fair value | $ 8,600 | ||||||||
| Percent of net assets | 2.46% | 2.46% | 2.46% | 2.46% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: RLJ Pro-Vac, Inc. First Lien Secured Term Loan First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RLJPro-VacInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Acquisition Date | Dec. 31, 2021 | ||||||||
| Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Road Safety Services, First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RoadSafetyServicesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | Dec. 30, 2021 | ||||||||
| Maturity Date | Mar. 18, 2025 | Mar. 18, 2025 | Mar. 18, 2025 | Mar. 18, 2025 | |||||
| Principal/Share Amount | $ 4,099 | ||||||||
| Investments, amortized cost | 4,017 | ||||||||
| Investments, at fair value | $ 4,017 | ||||||||
| Percent of net assets | 1.15% | 1.15% | 1.15% | 1.15% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Road Safety Services, Inc. First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RoadSafetyServicesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 10.92% | 10.92% | 10.92% | 10.92% | |||||
| Acquisition Date | Dec. 31, 2019 | ||||||||
| Maturity Date | Mar. 18, 2025 | Mar. 18, 2025 | Mar. 18, 2025 | Mar. 18, 2025 | |||||
| Principal/Share Amount | $ 8,603 | ||||||||
| Investments, amortized cost | 8,522 | ||||||||
| Investments, at fair value | $ 8,432 | ||||||||
| Investment, Identifier [Axis]: Road Safety Services, Inc., First Lien Secured Revolving Loan, Floor 3.25%, Spread P plus 5.50%, Rate 8.75%, Due 9/18/2023 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RoadSafetyServicesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | |||||
| Floor | 3.25% | 3.25% | 3.25% | 3.25% | |||||
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | |||||
| Interest Rate | 8.75% | 8.75% | 8.75% | 8.75% | |||||
| Acquisition Date | Dec. 31, 2019 | ||||||||
| Maturity Date | Sep. 18, 2023 | Sep. 18, 2023 | Sep. 18, 2023 | Sep. 18, 2023 | |||||
| Principal/Share Amount | $ 496 | ||||||||
| Investments, amortized cost | 489 | ||||||||
| Investments, at fair value | $ 501 | ||||||||
| Investment, Identifier [Axis]: Road Safety Services, Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 3/18/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RoadSafetyServicesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | Dec. 31, 2019 | ||||||||
| Maturity Date | Mar. 18, 2025 | Mar. 18, 2025 | Mar. 18, 2025 | Mar. 18, 2025 | |||||
| Principal/Share Amount | $ 6,427 | ||||||||
| Investments, amortized cost | 6,340 | ||||||||
| Investments, at fair value | $ 6,405 | ||||||||
| Investment, Identifier [Axis]: Ross-Simons Topco, LP Preferred Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:Ross-SimonsTopcoLPMember | whf:Ross-SimonsTopcoLPMember | |||||||
| Investment, Type [Extensible Enumeration] | us-gaap:PreferredStockMember | whf:PreferredUnitsMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |
| Spread Above Index | 8% | 8% | 8% | 8% | 8% | 8% | 8% | 8% | |
| PIK interest rate | 8% | 8% | 8% | 8% | 8% | 8% | 8% | 8% | |
| Acquisition Date | Dec. 04, 2020 | Dec. 04, 2020 | |||||||
| Principal/Share Amount | $ 600 | $ 600 | |||||||
| Investments, amortized cost | 514 | 600 | |||||||
| Investments, at fair value | $ 714 | $ 786 | |||||||
| Percent of net assets | 0.21% | 0.22% | 0.21% | 0.21% | 0.21% | 0.22% | 0.22% | 0.22% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Non-income Producing [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: SFS Global Holding Company Warrants | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:SFSGlobalHoldingCompanyMember | whf:SnapFitnessHoldingsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Other Diversified Financial Services | Other Diversified Financial Services | Other Diversified Financial Services | Other Diversified Financial Services | Other Diversified Financial Services | Other Diversified Financial Services | Other Diversified Financial Services | Other Diversified Financial Services | |
| Acquisition Date | Jun. 28, 2018 | Jun. 28, 2018 | |||||||
| Maturity Date | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | false | false | false | false | false | |
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC Common Stock | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SalonRepublicHoldingsLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | |||||
| Acquisition Date | Dec. 02, 2022 | ||||||||
| Principal/Share Amount | $ 400 | ||||||||
| Investments, amortized cost | 400 | ||||||||
| Investments, at fair value | $ 400 | ||||||||
| Percent of net assets | 0.12% | 0.12% | 0.12% | 0.12% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Non-income Producing [true false] | false | false | false | false | |||||
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SalonRepublicHoldingsLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7% | 7% | 7% | 7% | |||||
| Interest Rate | 11.42% | 11.42% | 11.42% | 11.42% | |||||
| Acquisition Date | Dec. 02, 2022 | ||||||||
| Maturity Date | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | |||||
| Principal/Share Amount | $ 56 | ||||||||
| Investments, amortized cost | 55 | ||||||||
| Investments, at fair value | $ 55 | ||||||||
| Percent of net assets | 0.02% | 0.02% | 0.02% | 0.02% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SalonRepublicHoldingsLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7% | 7% | 7% | 7% | |||||
| Interest Rate | 11.42% | 11.42% | 11.42% | 11.42% | |||||
| Acquisition Date | Dec. 02, 2022 | ||||||||
| Maturity Date | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | |||||
| Principal/Share Amount | $ 258 | ||||||||
| Investments, amortized cost | 251 | ||||||||
| Investments, at fair value | $ 251 | ||||||||
| Percent of net assets | 0.08% | 0.08% | 0.08% | 0.08% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SalonRepublicHoldingsLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Interest Rate | 11.73% | 11.73% | 11.73% | 11.73% | |||||
| Acquisition Date | Dec. 02, 2022 | ||||||||
| Maturity Date | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | |||||
| Principal/Share Amount | $ 5,155 | ||||||||
| Investments, amortized cost | 5,003 | ||||||||
| Investments, at fair value | $ 5,003 | ||||||||
| Percent of net assets | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC, Preferred Stock | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SalonRepublicHoldingsLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | |||||
| PIK interest rate | 8% | 8% | 8% | 8% | |||||
| Acquisition Date | Dec. 02, 2022 | ||||||||
| Principal/Share Amount | $ 200 | ||||||||
| Investments, amortized cost | 200 | ||||||||
| Investments, at fair value | $ 200 | ||||||||
| Percent of net assets | 0.06% | 0.06% | 0.06% | 0.06% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Non-income Producing [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Sigue Corporation Warrants | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:SigueCorporationMember | whf:SigueCorporationMember | |||||||
| Investment, Type [Extensible Enumeration] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Other Diversified Financial Services | Other Diversified Financial Services | Other Diversified Financial Services | Other Diversified Financial Services | Other Diversified Financial Services | Other Diversified Financial Services | Other Diversified Financial Services | Other Diversified Financial Services | |
| Acquisition Date | Jun. 28, 2018 | Jun. 28, 2018 | |||||||
| Maturity Date | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | |
| Principal/Share Amount | $ 22 | $ 22 | |||||||
| Investments, amortized cost | 2,890 | 2,890 | |||||||
| Investments, at fair value | $ 3,788 | $ 3,492 | |||||||
| Percent of net assets | 1.14% | 1% | 1.14% | 1.14% | 1.14% | 1% | 1% | 1% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | false | false | false | false | false | |
| Investment, Identifier [Axis]: Sklar Holdings, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:SklarHoldingsIncMember | whf:SklarHoldingsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Chemicals | Diversified Chemicals | Diversified Chemicals | Diversified Chemicals | Diversified Chemicals | Diversified Chemicals | Diversified Chemicals | Diversified Chemicals | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:PrimeRateMember | London Interbank Offered Rate (LIBOR) [Member] | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 8.75% | 7.75% | 8.75% | 8.75% | 8.75% | 7.75% | 7.75% | 7.75% | |
| Interest Rate | 16.25% | 8.75% | 16.25% | 16.25% | 16.25% | 8.75% | 8.75% | 8.75% | |
| Investment, interest rate, paid in cash | 14.25% | 14.25% | 14.25% | 14.25% | |||||
| PIK interest rate | 2% | 2% | 2% | 2% | |||||
| Acquisition Date | Nov. 13, 2019 | Nov. 13, 2019 | |||||||
| Maturity Date | May 13, 2023 | May 13, 2023 | May 13, 2023 | May 13, 2023 | May 13, 2023 | May 13, 2023 | May 13, 2023 | May 13, 2023 | |
| Principal/Share Amount | $ 7,353 | $ 7,389 | |||||||
| Investments, amortized cost | 7,302 | 7,295 | |||||||
| Investments, at fair value | $ 6,537 | $ 7,020 | |||||||
| Percent of net assets | 1.97% | 2.01% | 1.97% | 1.97% | 1.97% | 2.01% | 2.01% | 2.01% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Sleep OpCo LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:SleepOpCoLLCMember | whf:SleepOpCoLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Home Furnishings | Home Furnishings | Home Furnishings | Home Furnishings | Home Furnishings | Home Furnishings | Home Furnishings | Home Furnishings | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.50% | 9.75% | 6.50% | 6.50% | 6.50% | 9.75% | 9.75% | 9.75% | |
| Interest Rate | 10.40% | 7.50% | 10.40% | 10.40% | 10.40% | 7.50% | 7.50% | 7.50% | |
| Acquisition Date | Oct. 12, 2021 | Oct. 12, 2021 | |||||||
| Maturity Date | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | |
| Investments, at fair value | $ (39) | ||||||||
| Percent of net assets | (0.01%) | (0.01%) | (0.01%) | (0.01%) | |||||
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Sleep OpCo LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:SleepOpCoLLCMember | whf:SleepOpCoLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Home Furnishings | Home Furnishings | Home Furnishings | Home Furnishings | Home Furnishings | Home Furnishings | Home Furnishings | Home Furnishings | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.40% | 7.50% | 10.40% | 10.40% | 10.40% | 7.50% | 7.50% | 7.50% | |
| Acquisition Date | Oct. 12, 2021 | Oct. 12, 2021 | |||||||
| Maturity Date | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | |
| Principal/Share Amount | $ 20,834 | $ 20,034 | |||||||
| Investments, amortized cost | 20,517 | 19,651 | |||||||
| Investments, at fair value | $ 20,210 | $ 19,645 | |||||||
| Percent of net assets | 6.08% | 5.62% | 6.08% | 6.08% | 6.08% | 5.62% | 5.62% | 5.62% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Smalto Inc., First Lien Secured Term Loan, Floor 1.00%, Spread E plus 6.25%, Rate 9.00%, Due 4/28/28 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SmaltoInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Household Appliances | Household Appliances | Household Appliances | Household Appliances | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whf:EuroInterbankOfferedRateMember | whf:EuroInterbankOfferedRateMember | whf:EuroInterbankOfferedRateMember | whf:EuroInterbankOfferedRateMember | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Interest Rate | 9% | 9% | 9% | 9% | |||||
| Acquisition Date | May 04, 2022 | ||||||||
| Maturity Date | Apr. 28, 2028 | Apr. 28, 2028 | Apr. 28, 2028 | Apr. 28, 2028 | |||||
| Principal/Share Amount | € | € 6,642 | ||||||||
| Investments, amortized cost | $ 6,865 | ||||||||
| Investments, at fair value | $ 6,899 | ||||||||
| Investment, Identifier [Axis]: Smalto Inc., First Lien Secured Term Loan, Floor 1.00%, Spread SF plus 6.00%, Rate 11.04%, Due 4/28/28 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SmaltoInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Household Appliances | Household Appliances | Household Appliances | Household Appliances | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 11.04% | 11.04% | 11.04% | 11.04% | |||||
| Acquisition Date | May 04, 2022 | ||||||||
| Maturity Date | Apr. 28, 2028 | Apr. 28, 2028 | Apr. 28, 2028 | Apr. 28, 2028 | |||||
| Principal/Share Amount | $ 1,012 | ||||||||
| Investments, amortized cost | 994 | ||||||||
| Investments, at fair value | $ 986 | ||||||||
| Investment, Identifier [Axis]: Snap Fitness Holdings, Inc Class A Common Stock | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:SnapFitnessHoldingsIncMember | whf:SnapFitnessHoldingsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | us-gaap:CommonClassAMember | us-gaap:CommonClassAMember | us-gaap:CommonClassAMember | us-gaap:CommonClassAMember | us-gaap:CommonClassAMember | us-gaap:CommonClassAMember | us-gaap:CommonClassAMember | us-gaap:CommonClassAMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | |
| Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | |||||||
| Principal/Share Amount | $ 2 | $ 2 | |||||||
| Investments, amortized cost | 1,941 | 1,941 | |||||||
| Investments, at fair value | $ 131 | $ 188 | |||||||
| Percent of net assets | 0.04% | 0.05% | 0.04% | 0.04% | 0.04% | 0.05% | 0.05% | 0.05% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | false | false | false | false | false | |
| Investment, Identifier [Axis]: Snap Fitness Holdings, Inc First Lien Secured Term Loan C | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:SnapFitnessHoldingsIncMember | whf:SnapFitnessHoldingsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | |
| Spread Above Index | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | |
| Interest Rate | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | |
| Investment, interest rate, paid in cash | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | |
| PIK interest rate | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | |
| Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | |||||||
| Principal/Share Amount | $ 1,268 | $ 1,268 | |||||||
| Investments, amortized cost | 1,265 | 1,265 | |||||||
| Investments, at fair value | $ 1,198 | $ 1,219 | |||||||
| Percent of net assets | 0.36% | 0.35% | 0.36% | 0.36% | 0.36% | 0.35% | 0.35% | 0.35% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Snap Fitness Holdings, Inc Warrants | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:SnapFitnessHoldingsIncMember | whf:SnapFitnessHoldingsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | Leisure Facilities | |
| Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | |||||||
| Maturity Date | Jun. 28, 2028 | Jun. 28, 2028 | Jun. 28, 2028 | Jun. 28, 2028 | Jun. 28, 2028 | Jun. 28, 2028 | Jun. 28, 2028 | Jun. 28, 2028 | |
| Principal/Share Amount | $ 1 | $ 1 | |||||||
| Investments, amortized cost | 793 | 793 | |||||||
| Investments, at fair value | $ 53 | $ 76 | |||||||
| Percent of net assets | 0.02% | 0.02% | 0.02% | 0.02% | 0.02% | 0.02% | 0.02% | 0.02% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | false | false | false | false | false | |
| Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate 8.94 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | Solar Holdings Bidco Limited | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Interest Rate | 11.05% | 11.05% | 11.05% | 11.05% | |||||
| Acquisition Date | Sep. 30, 2022 | ||||||||
| Maturity Date | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | |||||
| Investments, at fair value | $ (62) | ||||||||
| Percent of net assets | (0.02%) | (0.02%) | (0.02%) | (0.02%) | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate 9.74 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | Solar Holdings Bidco Limited | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Interest Rate | 11.05% | 11.05% | 11.05% | 11.05% | |||||
| Acquisition Date | Sep. 30, 2022 | ||||||||
| Maturity Date | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | |||||
| Principal/Share Amount | $ 53 | ||||||||
| Investments, amortized cost | 51 | ||||||||
| Investments, at fair value | $ 52 | ||||||||
| Percent of net assets | 0.02% | 0.02% | 0.02% | 0.02% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Term Loan CDOR | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | Solar Holdings Bidco Limited | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | |||||
| Floor | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Interest Rate | 11.61% | 11.61% | 11.61% | 11.61% | |||||
| Acquisition Date | Sep. 30, 2022 | ||||||||
| Maturity Date | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | |||||
| Principal/Share Amount | $ 3,837 | ||||||||
| Investments, amortized cost | 2,729 | ||||||||
| Investments, at fair value | $ 2,749 | ||||||||
| Percent of net assets | 0.83% | 0.83% | 0.83% | 0.83% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Term Loan SF | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | Solar Holdings Bidco Limited | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Interest Rate | 11.05% | 11.05% | 11.05% | 11.05% | |||||
| Acquisition Date | Sep. 30, 2022 | ||||||||
| Maturity Date | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | |||||
| Principal/Share Amount | $ 2,783 | ||||||||
| Investments, amortized cost | 2,709 | ||||||||
| Investments, at fair value | $ 2,713 | ||||||||
| Percent of net assets | 0.82% | 0.82% | 0.82% | 0.82% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Term Loan SONIA | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | Solar Holdings Bidco Limited | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whf:SterlingOvernightIndexAverageMember | whf:SterlingOvernightIndexAverageMember | whf:SterlingOvernightIndexAverageMember | whf:SterlingOvernightIndexAverageMember | |||||
| Floor | 0% | 0% | 0% | 0% | |||||
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Interest Rate | 10.18% | 10.18% | 10.18% | 10.18% | |||||
| Acquisition Date | Sep. 30, 2022 | ||||||||
| Maturity Date | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | |||||
| Principal/Share Amount | $ 168 | ||||||||
| Investments, amortized cost | 182 | ||||||||
| Investments, at fair value | $ 199 | ||||||||
| Percent of net assets | 0.06% | 0.06% | 0.06% | 0.06% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC , First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 7/30/2027 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SourceCodeHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | Aug. 10, 2021 | ||||||||
| Maturity Date | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | |||||
| Investments, at fair value | $ 1 | ||||||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC , First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 7/30/2027 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SourceCodeHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | Aug. 10, 2021 | ||||||||
| Maturity Date | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | |||||
| Principal/Share Amount | $ 7,629 | ||||||||
| Investments, amortized cost | 7,487 | ||||||||
| Investments, at fair value | $ 7,489 | ||||||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SourceCodeHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | Jul. 30, 2021 | ||||||||
| Maturity Date | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SourceCodeHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | Jul. 30, 2021 | ||||||||
| Maturity Date | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | |||||
| Principal/Share Amount | $ 7,629 | ||||||||
| Investments, amortized cost | 7,487 | ||||||||
| Investments, at fair value | $ 7,489 | ||||||||
| Percent of net assets | 2.14% | 2.14% | 2.14% | 2.14% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus, 6.50%, Rate 10.92%, Due 7/30/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:E-PhoenixAcquisitionCo.Inc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 10.92% | 10.92% | 10.92% | 10.92% | |||||
| Acquisition Date | Aug. 10, 2021 | ||||||||
| Maturity Date | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | |||||
| Investments, at fair value | $ 2 | ||||||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus, 6.50%, Rate 10.92%, Due 7/30/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:E-PhoenixAcquisitionCo.Inc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 10.92% | 10.92% | 10.92% | 10.92% | |||||
| Acquisition Date | Aug. 10, 2021 | ||||||||
| Maturity Date | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | |||||
| Principal/Share Amount | $ 15,105 | ||||||||
| Investments, amortized cost | 14,874 | ||||||||
| Investments, at fair value | $ 14,882 | ||||||||
| Investment, Identifier [Axis]: Stella & Chewy's LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus 8.75%, Rate 13.17% (11.17% Cash + 2.00% PIK), Due 12/16/25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:StellaandChewysLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 8.75% | 8.75% | 8.75% | 8.75% | |||||
| Interest Rate | 13.17% | 13.17% | 13.17% | 13.17% | |||||
| Investment, interest rate, paid in cash | 11.17% | 11.17% | 11.17% | 11.17% | |||||
| PIK interest rate | 2% | 2% | 2% | 2% | |||||
| Acquisition Date | Mar. 26, 2021 | ||||||||
| Maturity Date | Dec. 16, 2025 | Dec. 16, 2025 | Dec. 16, 2025 | Dec. 16, 2025 | |||||
| Principal/Share Amount | $ 1,375 | ||||||||
| Investments, amortized cost | 1,362 | ||||||||
| Investments, at fair value | $ 1,320 | ||||||||
| Investment, Identifier [Axis]: Stella & Chewy's LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 8.75%, Rate 13.40% (11.40% Cash + 2.00% PIK), Due 12/16/25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:StellaandChewysLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 8.75% | 8.75% | 8.75% | 8.75% | |||||
| Interest Rate | 13.40% | 13.40% | 13.40% | 13.40% | |||||
| Investment, interest rate, paid in cash | 11.40% | 11.40% | 11.40% | 11.40% | |||||
| PIK interest rate | 2% | 2% | 2% | 2% | |||||
| Acquisition Date | Dec. 29, 2020 | ||||||||
| Maturity Date | Dec. 16, 2025 | Dec. 16, 2025 | Dec. 16, 2025 | Dec. 16, 2025 | |||||
| Principal/Share Amount | $ 3,893 | ||||||||
| Investments, amortized cost | 3,849 | ||||||||
| Investments, at fair value | $ 3,738 | ||||||||
| Investment, Identifier [Axis]: Stella and Chewy's LLC, First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.75%, Rate 7.75%, Due 12/16/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:StellaandChewysLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Acquisition Date | Dec. 29, 2020 | ||||||||
| Maturity Date | Dec. 16, 2025 | Dec. 16, 2025 | Dec. 16, 2025 | Dec. 16, 2025 | |||||
| Principal/Share Amount | $ 1,893 | ||||||||
| Investments, amortized cost | 1,877 | ||||||||
| Investments, at fair value | $ 1,697 | ||||||||
| Investment, Identifier [Axis]: Stella and Chewy's LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.75%, Rate 7.75%, Due 12/16/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:StellaandChewysLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Acquisition Date | Dec. 29, 2020 | ||||||||
| Maturity Date | Dec. 16, 2025 | Dec. 16, 2025 | Dec. 16, 2025 | Dec. 16, 2025 | |||||
| Principal/Share Amount | $ 5,313 | ||||||||
| Investments, amortized cost | 5,228 | ||||||||
| Investments, at fair value | $ 4,967 | ||||||||
| Investment, Identifier [Axis]: StoicLane MidCo, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:StoiclaneMidcoLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Development [Member] | Real Estate Development [Member] | Real Estate Development [Member] | Real Estate Development [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Interest Rate | 12.20% | 12.20% | 12.20% | 12.20% | |||||
| Acquisition Date | Nov. 04, 2022 | ||||||||
| Maturity Date | Nov. 04, 2027 | Nov. 04, 2027 | Nov. 04, 2027 | Nov. 04, 2027 | |||||
| Principal/Share Amount | $ 3,621 | ||||||||
| Investments, amortized cost | 3,563 | ||||||||
| Investments, at fair value | $ 3,563 | ||||||||
| Percent of net assets | 1.07% | 1.07% | 1.07% | 1.07% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: StoicLane MidCo, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:StoiclaneMidcoLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Development [Member] | Real Estate Development [Member] | Real Estate Development [Member] | Real Estate Development [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Interest Rate | 11.82% | 11.82% | 11.82% | 11.82% | |||||
| Acquisition Date | Nov. 04, 2022 | ||||||||
| Maturity Date | Nov. 04, 2027 | Nov. 04, 2027 | Nov. 04, 2027 | Nov. 04, 2027 | |||||
| Principal/Share Amount | $ 4,653 | ||||||||
| Investments, amortized cost | 4,540 | ||||||||
| Investments, at fair value | $ 4,540 | ||||||||
| Percent of net assets | 1.37% | 1.37% | 1.37% | 1.37% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Sunless, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SunlessInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Personal Products | Personal Products | Personal Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Acquisition Date | Jun. 30, 2022 | ||||||||
| Maturity Date | Aug. 13, 2025 | Aug. 13, 2025 | Aug. 13, 2025 | Aug. 13, 2025 | |||||
| Principal/Share Amount | $ 2,086 | ||||||||
| Investments, amortized cost | 2,051 | ||||||||
| Investments, at fair value | $ 2,071 | ||||||||
| Percent of net assets | 0.62% | 0.62% | 0.62% | 0.62% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Sunless, Inc., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 8/13/2024 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SunlessIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Personal Products | Personal Products | Personal Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Oct. 21, 2019 | ||||||||
| Maturity Date | Aug. 13, 2024 | Aug. 13, 2024 | Aug. 13, 2024 | Aug. 13, 2024 | |||||
| Investments, at fair value | $ 14 | ||||||||
| Investment, Identifier [Axis]: Sunless, Inc., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.24%, Due 8/13/25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MaxSolutionsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Personal Products | Personal Products | Personal Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 11.24% | 11.24% | 11.24% | 11.24% | |||||
| Acquisition Date | Oct. 21, 2019 | ||||||||
| Maturity Date | Aug. 13, 2025 | Aug. 13, 2025 | Aug. 13, 2025 | Aug. 13, 2025 | |||||
| Principal/Share Amount | $ 266 | ||||||||
| Investments, amortized cost | 264 | ||||||||
| Investments, at fair value | $ 270 | ||||||||
| Investment, Identifier [Axis]: Sunless, Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 8/13/2024 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SunlessIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Personal Products | Personal Products | Personal Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Oct. 21, 2019 | ||||||||
| Maturity Date | Aug. 13, 2024 | Aug. 13, 2024 | Aug. 13, 2024 | Aug. 13, 2024 | |||||
| Principal/Share Amount | $ 4,259 | ||||||||
| Investments, amortized cost | 4,185 | ||||||||
| Investments, at fair value | $ 4,259 | ||||||||
| Investment, Identifier [Axis]: Sunless, Inc.., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.23%, Due 8/13/25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MaxSolutionsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Personal Products | Personal Products | Personal Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Acquisition Date | Oct. 21, 2019 | ||||||||
| Maturity Date | Aug. 13, 2025 | Aug. 13, 2025 | Aug. 13, 2025 | Aug. 13, 2025 | |||||
| Principal/Share Amount | $ 3,679 | ||||||||
| Investments, amortized cost | 3,631 | ||||||||
| Investments, at fair value | $ 3,679 | ||||||||
| Investment, Identifier [Axis]: Sure Fit Home Products, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SureFitHomeProductsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Home Furnishings | Home Furnishings | Home Furnishings | Home Furnishings | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Interest Rate | 10.75% | 10.75% | 10.75% | 10.75% | |||||
| Acquisition Date | Apr. 12, 2021 | ||||||||
| Maturity Date | Jul. 13, 2023 | Jul. 13, 2023 | Jul. 13, 2023 | Jul. 13, 2023 | |||||
| Principal/Share Amount | $ 4,912 | ||||||||
| Investments, amortized cost | 4,828 | ||||||||
| Investments, at fair value | $ 4,372 | ||||||||
| Percent of net assets | 1.25% | 1.25% | 1.25% | 1.25% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: TOUR Intermediate Holdings, LLC, First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 5/15/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TOURIntermediateHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | May 19, 2020 | ||||||||
| Maturity Date | May 15, 2025 | May 15, 2025 | May 15, 2025 | May 15, 2025 | |||||
| Principal/Share Amount | $ 2,616 | ||||||||
| Investments, amortized cost | 2,600 | ||||||||
| Investments, at fair value | $ 2,616 | ||||||||
| Investment, Identifier [Axis]: TOUR Intermediate Holdings, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 5/15/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TOURIntermediateHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | May 19, 2020 | ||||||||
| Maturity Date | May 15, 2025 | May 15, 2025 | May 15, 2025 | May 15, 2025 | |||||
| Principal/Share Amount | $ 7,438 | ||||||||
| Investments, amortized cost | 7,343 | ||||||||
| Investments, at fair value | $ 7,438 | ||||||||
| Investment, Identifier [Axis]: TOUR Intermediate Holdings., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.50%, Rate 10.88%, Due 5/15/25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TOURIntermediateHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 10.88% | 10.88% | 10.88% | 10.88% | |||||
| Acquisition Date | May 19, 2020 | ||||||||
| Maturity Date | May 15, 2025 | May 15, 2025 | May 15, 2025 | May 15, 2025 | |||||
| Principal/Share Amount | $ 2,468 | ||||||||
| Investments, amortized cost | 2,458 | ||||||||
| Investments, at fair value | $ 2,468 | ||||||||
| Investment, Identifier [Axis]: TOUR Intermediate Holdings., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 10.88%, Due 5/15/25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TOURIntermediateHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 10.88% | 10.88% | 10.88% | 10.88% | |||||
| Acquisition Date | May 19, 2020 | ||||||||
| Maturity Date | May 15, 2025 | May 15, 2025 | May 15, 2025 | May 15, 2025 | |||||
| Principal/Share Amount | $ 3,077 | ||||||||
| Investments, amortized cost | 3,049 | ||||||||
| Investments, at fair value | $ 3,077 | ||||||||
| Investment, Identifier [Axis]: Team Car Care Holdings, First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:TeamCarCareHoldingsLLCMember | whf:TeamCarCareHoldingsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Automotive Retail | Automotive Retail | Automotive Retail | Automotive Retail | Automotive Retail | Automotive Retail | Automotive Retail | Automotive Retail | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | |
| Floor | 1% | 1.03% | 1% | 1% | 1% | 1.03% | 1.03% | 1.03% | |
| Spread Above Index | 7.98% | 7.98% | 7.98% | 7.98% | 7.98% | 7.98% | 7.98% | 7.98% | |
| Interest Rate | 11.83% | 9.02% | 11.83% | 11.83% | 11.83% | 9.02% | 9.02% | 9.02% | |
| Acquisition Date | Feb. 16, 2018 | Feb. 16, 2018 | |||||||
| Maturity Date | Jun. 28, 2024 | Jun. 28, 2024 | Jun. 28, 2024 | Jun. 28, 2024 | Jun. 28, 2024 | Jun. 28, 2024 | Jun. 28, 2024 | Jun. 28, 2024 | |
| Principal/Share Amount | $ 14,363 | $ 15,286 | |||||||
| Investments, amortized cost | 14,311 | 15,193 | |||||||
| Investments, at fair value | $ 14,363 | $ 15,286 | |||||||
| Percent of net assets | 4.32% | 4.37% | 4.32% | 4.32% | 4.32% | 4.37% | 4.37% | 4.37% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Telestream Holdings Corporation First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | Telestream Holdings Corporation [Member] | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 9.25% | 9.25% | 9.25% | 9.25% | |||||
| Interest Rate | 13.67% | 13.67% | 13.67% | 13.67% | |||||
| Acquisition Date | May 12, 2022 | ||||||||
| Maturity Date | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | |||||
| Investments, at fair value | $ 3 | ||||||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Telestream Holdings Corporation First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | Telestream Holdings Corporation [Member] | Telestream Holdings Corporation [Member] | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 9.25% | 8.75% | 9.25% | 9.25% | 9.25% | 8.75% | 8.75% | 8.75% | |
| Interest Rate | 13.67% | 9.75% | 13.67% | 13.67% | 13.67% | 9.75% | 9.75% | 9.75% | |
| Acquisition Date | Oct. 15, 2020 | Oct. 15, 2020 | |||||||
| Maturity Date | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | |
| Principal/Share Amount | $ 927 | $ 530 | |||||||
| Investments, amortized cost | 910 | 517 | |||||||
| Investments, at fair value | $ 928 | $ 549 | |||||||
| Percent of net assets | 0.28% | 0.16% | 0.28% | 0.28% | 0.28% | 0.16% | 0.16% | 0.16% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Telestream Holdings Corporation First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | Telestream Holdings Corporation [Member] | Telestream Holdings Corporation [Member] | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 9.25% | 8.75% | 9.25% | 9.25% | 9.25% | 8.75% | 8.75% | 8.75% | |
| Interest Rate | 13.67% | 9.75% | 13.67% | 13.67% | 13.67% | 9.75% | 9.75% | 9.75% | |
| Acquisition Date | Oct. 15, 2020 | Oct. 15, 2020 | |||||||
| Maturity Date | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | |
| Principal/Share Amount | $ 15,846 | $ 15,079 | |||||||
| Investments, amortized cost | 15,556 | 14,713 | |||||||
| Investments, at fair value | $ 15,762 | $ 15,079 | |||||||
| Percent of net assets | 4.74% | 4.31% | 4.74% | 4.74% | 4.74% | 4.31% | 4.31% | 4.31% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Tensar Corporation First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TensarCorporationMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Acquisition Date | Nov. 20, 2020 | ||||||||
| Maturity Date | Aug. 20, 2025 | Aug. 20, 2025 | Aug. 20, 2025 | Aug. 20, 2025 | |||||
| Principal/Share Amount | $ 6,930 | ||||||||
| Investments, amortized cost | 6,797 | ||||||||
| Investments, at fair value | $ 7,069 | ||||||||
| Percent of net assets | 2.02% | 2.02% | 2.02% | 2.02% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Tensar Corporation, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.75%, Rate 7.75%, Due 8/20/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TensarCorporationMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Acquisition Date | Nov. 24, 2020 | ||||||||
| Maturity Date | Aug. 20, 2025 | Aug. 20, 2025 | Aug. 20, 2025 | Aug. 20, 2025 | |||||
| Principal/Share Amount | $ 6,930 | ||||||||
| Investments, amortized cost | 6,797 | ||||||||
| Investments, at fair value | $ 7,069 | ||||||||
| Investment, Identifier [Axis]: The Kyjen Company, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:TheKyjenCompanyLLCMember | whf:TheKyjenCompanyLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Household Products | Household Products | Household Products | Household Products | Household Products | Household Products | Household Products | Household Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.58% | 6.50% | 6.58% | 6.58% | 6.58% | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.90% | 7.50% | 10.90% | 10.90% | 10.90% | 7.50% | 7.50% | 7.50% | |
| Investment, interest rate, paid in cash | 10.40% | 10.40% | 10.40% | 10.40% | |||||
| PIK interest rate | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Acquisition Date | Apr. 05, 2021 | Apr. 05, 2021 | |||||||
| Maturity Date | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | |
| Principal/Share Amount | $ 798 | $ 385 | |||||||
| Investments, amortized cost | 790 | 380 | |||||||
| Investments, at fair value | $ 724 | $ 390 | |||||||
| Percent of net assets | 0.22% | 0.11% | 0.22% | 0.22% | 0.22% | 0.11% | 0.11% | 0.11% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: The Kyjen Company, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:TheKyjenCompanyLLCMember | whf:TheKyjenCompanyLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Household Products | Household Products | Household Products | Household Products | Household Products | Household Products | Household Products | Household Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 7% | 6.50% | 7% | 7% | 7% | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 11.65% | 7.50% | 11.65% | 11.65% | 11.65% | 7.50% | 7.50% | 7.50% | |
| Investment, interest rate, paid in cash | 11.15% | 11.15% | 11.15% | 11.15% | |||||
| PIK interest rate | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Acquisition Date | Apr. 05, 2021 | Apr. 05, 2021 | |||||||
| Maturity Date | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | |
| Principal/Share Amount | $ 11,334 | $ 11,403 | |||||||
| Investments, amortized cost | 11,223 | 11,257 | |||||||
| Investments, at fair value | $ 10,429 | $ 11,383 | |||||||
| Percent of net assets | 3.14% | 3.25% | 3.14% | 3.14% | 3.14% | 3.25% | 3.25% | 3.25% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Token Buyer, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TokenBuyerIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Household Appliances | Household Appliances | Household Appliances | Household Appliances | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 10.73% | 10.73% | 10.73% | 10.73% | |||||
| Acquisition Date | May 26, 2022 | ||||||||
| Maturity Date | May 31, 2029 | May 31, 2029 | May 31, 2029 | May 31, 2029 | |||||
| Principal/Share Amount | $ 7,214 | ||||||||
| Investments, amortized cost | 6,680 | ||||||||
| Investments, at fair value | $ 6,615 | ||||||||
| Percent of net assets | 1.99% | 1.99% | 1.99% | 1.99% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Trimlite Buyer LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TrimliteBuyerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | Jul. 27, 2021 | ||||||||
| Maturity Date | Jul. 27, 2026 | Jul. 27, 2026 | Jul. 27, 2026 | Jul. 27, 2026 | |||||
| Principal/Share Amount | $ 164 | ||||||||
| Investments, amortized cost | 161 | ||||||||
| Investments, at fair value | $ 161 | ||||||||
| Percent of net assets | 0.05% | 0.05% | 0.05% | 0.05% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Trimlite Buyer LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:TrimliteBuyerLLCMember | whf:TrimliteBuyerLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6% | 6.50% | 6% | 6% | 6% | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.88% | 7.50% | 10.88% | 10.88% | 10.88% | 7.50% | 7.50% | 7.50% | |
| Acquisition Date | Jul. 27, 2021 | Jul. 27, 2021 | |||||||
| Maturity Date | Jul. 27, 2026 | Jul. 27, 2026 | Jul. 27, 2026 | Jul. 27, 2026 | Jul. 27, 2026 | Jul. 27, 2026 | Jul. 27, 2026 | Jul. 27, 2026 | |
| Principal/Share Amount | $ 20,582 | $ 22,977 | |||||||
| Investments, amortized cost | 16,162 | 17,975 | |||||||
| Investments, at fair value | $ 14,926 | $ 17,841 | |||||||
| Percent of net assets | 4.49% | 5.10% | 4.49% | 4.49% | 4.49% | 5.10% | 5.10% | 5.10% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: True Blue Car Wash, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:TrueBlueCarWashLLCMember | whf:TrueBlueCarWashLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Research & Consulting Services | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.50% | 6.82% | 6.50% | 6.50% | 6.50% | 6.82% | 6.82% | 6.82% | |
| Interest Rate | 10.92% | 7.82% | 10.92% | 10.92% | 10.92% | 7.82% | 7.82% | 7.82% | |
| Acquisition Date | Oct. 17, 2019 | Oct. 17, 2019 | |||||||
| Maturity Date | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | |
| Principal/Share Amount | $ 4,160 | $ 3,103 | |||||||
| Investments, amortized cost | 4,107 | 3,073 | |||||||
| Investments, at fair value | $ 4,189 | $ 3,098 | |||||||
| Percent of net assets | 1.26% | 0.89% | 1.26% | 1.26% | 1.26% | 0.89% | 0.89% | 0.89% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: True Blue Car Wash, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:TrueBlueCarWashLLCMember | whf:TrueBlueCarWashLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services | Research & Consulting Services | Specialized Consumer Services | Specialized Consumer Services | Specialized Consumer Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Spread Above Index | 6.88% | 6.82% | 6.88% | 6.88% | 6.88% | 6.82% | 6.82% | 6.82% | |
| Interest Rate | 11.30% | 7.82% | 11.30% | 11.30% | 11.30% | 7.82% | 7.82% | 7.82% | |
| Acquisition Date | Oct. 17, 2019 | Oct. 17, 2019 | |||||||
| Maturity Date | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | |
| Principal/Share Amount | $ 9,903 | $ 8,203 | |||||||
| Investments, amortized cost | 9,822 | 8,087 | |||||||
| Investments, at fair value | $ 9,942 | $ 8,130 | |||||||
| Percent of net assets | 2.99% | 2.32% | 2.99% | 2.99% | 2.99% | 2.32% | 2.32% | 2.32% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Turnberry Solutions, Inc., First Lien Secured Revolving Loan, Floor 3.25%, Spread P plus 5.00%, Rate 8.25%, Due 9/2/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TurnberrySolutionsInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | |||||
| Floor | 3.25% | 3.25% | 3.25% | 3.25% | |||||
| Spread Above Index | 5% | 5% | 5% | 5% | |||||
| Interest Rate | 8.25% | 8.25% | 8.25% | 8.25% | |||||
| Acquisition Date | Aug. 10, 2021 | ||||||||
| Maturity Date | Sep. 02, 2026 | Sep. 02, 2026 | Sep. 02, 2026 | Sep. 02, 2026 | |||||
| Principal/Share Amount | $ 86 | ||||||||
| Investments, amortized cost | 84 | ||||||||
| Investments, at fair value | $ 85 | ||||||||
| Investment, Identifier [Axis]: Turnberry Solutions, Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 9/2/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TurnberrySolutionsInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Aug. 10, 2021 | ||||||||
| Maturity Date | Sep. 02, 2026 | Sep. 02, 2026 | Sep. 02, 2026 | Sep. 02, 2026 | |||||
| Principal/Share Amount | $ 5,791 | ||||||||
| Investments, amortized cost | 5,689 | ||||||||
| Investments, at fair value | $ 5,684 | ||||||||
| Investment, Identifier [Axis]: Turnberry Solutions., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 6.00%, Rate 9.19%, Due 9/2/28 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TurnberrySolutionsInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 9.19% | 9.19% | 9.19% | 9.19% | |||||
| Acquisition Date | Aug. 10, 2021 | ||||||||
| Maturity Date | Sep. 02, 2026 | Sep. 02, 2026 | Sep. 02, 2026 | Sep. 02, 2026 | |||||
| Investments, at fair value | $ (4) | ||||||||
| Investment, Identifier [Axis]: Turnberry Solutions., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.00%, Rate 9.19%, Due 9/2/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TurnberrySolutionsInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 9.19% | 9.19% | 9.19% | 9.19% | |||||
| Acquisition Date | Aug. 10, 2021 | ||||||||
| Maturity Date | Sep. 02, 2026 | Sep. 02, 2026 | Sep. 02, 2026 | Sep. 02, 2026 | |||||
| Principal/Share Amount | $ 6,087 | ||||||||
| Investments, amortized cost | 5,998 | ||||||||
| Investments, at fair value | $ 5,964 | ||||||||
| Investment, Identifier [Axis]: US Methanol Midco LLC (d/b/a US Methanol LLC) First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:UsMethanolMidcoLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Commodity Chemicals | Commodity Chemicals | Commodity Chemicals | Commodity Chemicals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Acquisition Date | Dec. 20, 2022 | ||||||||
| Maturity Date | Dec. 20, 2027 | Dec. 20, 2027 | Dec. 20, 2027 | Dec. 20, 2027 | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: US Methanol Midco LLC (d/b/a US Methanol LLC) First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:UsMethanolMidcoLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Commodity Chemicals | Commodity Chemicals | Commodity Chemicals | Commodity Chemicals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| PIK interest rate | 12.17% | 12.17% | 12.17% | 12.17% | |||||
| Acquisition Date | Dec. 20, 2022 | ||||||||
| Maturity Date | Dec. 20, 2027 | Dec. 20, 2027 | Dec. 20, 2027 | Dec. 20, 2027 | |||||
| Principal/Share Amount | $ 4,667 | ||||||||
| Investments, amortized cost | 4,551 | ||||||||
| Investments, at fair value | $ 4,551 | ||||||||
| Percent of net assets | 1.37% | 1.37% | 1.37% | 1.37% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: Unleashed Brands, LLC, First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 5.50%, Rate 6.50%, Due 11/19/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:UnleashedBrandsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | |||||
| Interest Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Acquisition Date | Nov. 30, 2021 | ||||||||
| Maturity Date | Nov. 19, 2026 | Nov. 19, 2026 | Nov. 19, 2026 | Nov. 19, 2026 | |||||
| Principal/Share Amount | $ 5,133 | ||||||||
| Investments, amortized cost | 5,083 | ||||||||
| Investments, at fair value | $ 5,082 | ||||||||
| Investment, Identifier [Axis]: Unleashed Brands, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 5.50%, Rate 6.50%, Due 11/19/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:UnleashedBrandsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | |||||
| Interest Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Acquisition Date | Nov. 30, 2021 | ||||||||
| Maturity Date | Nov. 19, 2026 | Nov. 19, 2026 | Nov. 19, 2026 | Nov. 19, 2026 | |||||
| Investment, Identifier [Axis]: Unleashed Brands, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 5.50%, Rate 6.50%, Due 11/19/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:UnleashedBrandsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 5.50% | 5.50% | 5.50% | 5.50% | |||||
| Interest Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Acquisition Date | Nov. 30, 2021 | ||||||||
| Maturity Date | Nov. 19, 2026 | Nov. 19, 2026 | Nov. 19, 2026 | Nov. 19, 2026 | |||||
| Principal/Share Amount | $ 3,887 | ||||||||
| Investments, amortized cost | 3,848 | ||||||||
| Investments, at fair value | $ 3,848 | ||||||||
| Investment, Identifier [Axis]: WH Lessor Corp. First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:WHLessorCorpMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 5.59% | 5.59% | 5.59% | 5.59% | |||||
| Interest Rate | 9.97% | 9.97% | 9.97% | 9.97% | |||||
| Acquisition Date | Jan. 22, 2020 | ||||||||
| Maturity Date | Dec. 26, 2024 | Dec. 26, 2024 | Dec. 26, 2024 | Dec. 26, 2024 | |||||
| Investments, at fair value | $ 4 | ||||||||
| Investment, Identifier [Axis]: WH Lessor Corp. First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:WHLessorCorpMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 5.59% | 5.59% | 5.59% | 5.59% | |||||
| Interest Rate | 9.97% | 9.97% | 9.97% | 9.97% | |||||
| Acquisition Date | Jan. 22, 2020 | ||||||||
| Maturity Date | Dec. 26, 2024 | Dec. 26, 2024 | Dec. 26, 2024 | Dec. 26, 2024 | |||||
| Principal/Share Amount | $ 7,470 | ||||||||
| Investments, amortized cost | 7,402 | ||||||||
| Investments, at fair value | $ 7,470 | ||||||||
| Investment, Identifier [Axis]: WH Lessor Corp., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/26/2024 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:WHLessorCorpMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Jan. 22, 2020 | ||||||||
| Maturity Date | Dec. 26, 2024 | Dec. 26, 2024 | Dec. 26, 2024 | Dec. 26, 2024 | |||||
| Investments, at fair value | $ 6 | ||||||||
| Investment, Identifier [Axis]: WH Lessor Corp., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/26/2024 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:WHLessorCorpMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6% | 6% | 6% | 6% | |||||
| Interest Rate | 7% | 7% | 7% | 7% | |||||
| Acquisition Date | Jan. 22, 2020 | ||||||||
| Maturity Date | Dec. 26, 2024 | Dec. 26, 2024 | Dec. 26, 2024 | Dec. 26, 2024 | |||||
| Principal/Share Amount | $ 6,870 | ||||||||
| Investments, amortized cost | 6,780 | ||||||||
| Investments, at fair value | $ 6,866 | ||||||||
| Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Equity | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:WHFSTRSOhioSeniorLoanFundLLCMember | whf:WHFSTRSOhioSeniorLoanFundLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | Equity Investments | Equity Investments | Equity Investments | Equity Investments | Equity Investments | Equity Investments | Equity Investments | Equity Investments | |
| Investments, at fair value | $ 20,160 | $ 15,607 | 10,167 | ||||||
| Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Interests | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:WHFSTRSOhioSeniorLoanFundMember | whf:WHFSTRSOhioSeniorLoanFundMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:LLCInterestsMember | whf:LLCInterestsMember | whf:LLCInterestsMember | whf:LLCInterestsMember | whf:LLCInterestsMember | whf:LLCInterestsMember | whf:LLCInterestsMember | whf:LLCInterestsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Finance | Specialized Finance | Specialized Finance | Specialized Finance | Specialized Finance | Specialized Finance | Specialized Finance | Specialized Finance | |
| Acquisition Date | Jul. 19, 2019 | Jul. 19, 2019 | |||||||
| Principal/Share Amount | $ 20,000 | $ 15,000 | |||||||
| Investments, amortized cost | 20,000 | 15,000 | |||||||
| Investments, at fair value | $ 20,160 | $ 15,607 | |||||||
| Percent of net assets | 6.07% | 4.46% | 6.07% | 6.07% | 6.07% | 4.46% | 4.46% | 4.46% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | false | false | false | false | false | |
| Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Subordinated Note | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:WHFSTRSOhioSeniorLoanFundLLCMember | whf:WHFSTRSOhioSeniorLoanFundLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | Subordinated Debt [Member] | Subordinated Debt [Member] | Subordinated Debt [Member] | Subordinated Debt [Member] | Subordinated Debt [Member] | Subordinated Debt [Member] | Subordinated Debt [Member] | Subordinated Debt [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Finance | Specialized Finance | Specialized Finance | Specialized Finance | Specialized Finance | Specialized Finance | Specialized Finance | Specialized Finance | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Interest Rate | 10.67% | 6.61% | 10.67% | 10.67% | 10.67% | 6.61% | 6.61% | 6.61% | |
| Acquisition Date | Jul. 19, 2019 | Jul. 19, 2019 | |||||||
| Principal/Share Amount | $ 80,000 | $ 60,000 | |||||||
| Investments, amortized cost | 80,000 | 60,000 | |||||||
| Investments, at fair value | $ 80,000 | $ 60,000 | $ 41,073 | ||||||
| Percent of net assets | 24.07% | 17.16% | 24.07% | 24.07% | 24.07% | 17.16% | 17.16% | 17.16% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Identifier [Axis]: Westrock Coffee Company, LLC, First lien Secured Term Loan, Floor 1.50%, Spread L plus 8.50%, Rate 10.00% (9.75% Cash + 0.25% PIK), Due 2/28/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:WestrockCoffeeCompanyLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Spread Above Index | 8.50% | 8.50% | 8.50% | 8.50% | |||||
| Interest Rate | 10% | 10% | 10% | 10% | |||||
| Investment, interest rate, paid in cash | 9.75% | 9.75% | 9.75% | 9.75% | |||||
| PIK interest rate | 0.25% | 0.25% | 0.25% | 0.25% | |||||
| Acquisition Date | Mar. 20, 2020 | ||||||||
| Maturity Date | Feb. 28, 2025 | Feb. 28, 2025 | Feb. 28, 2025 | Feb. 28, 2025 | |||||
| Principal/Share Amount | $ 9,105 | ||||||||
| Investments, amortized cost | 9,033 | ||||||||
| Investments, at fair value | $ 8,923 | ||||||||
| Investment, Identifier [Axis]: What If Holdings, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |||||
| Investment, Issuer Name [Extensible Enumeration] | whf:WhatIfHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Interactive Media & Services | Interactive Media & Services | Interactive Media & Services | Interactive Media & Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Floor | 1% | 1% | 1% | 1% | |||||
| Spread Above Index | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Acquisition Date | Oct. 02, 2019 | ||||||||
| Maturity Date | Oct. 02, 2024 | Oct. 02, 2024 | Oct. 02, 2024 | Oct. 02, 2024 | |||||
| Principal/Share Amount | $ 18,848 | ||||||||
| Investments, amortized cost | 18,609 | ||||||||
| Investments, at fair value | $ 18,759 | ||||||||
| Percent of net assets | 5.36% | 5.36% | 5.36% | 5.36% | |||||
| Investment, Restriction Status [true false] | true | true | true | true | |||||
| Investment, Significant Unobservable Input [true false] | true | true | true | true | |||||
| Investment, Identifier [Axis]: What If Media Group, LLC Common Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Affiliation [Extensible Enumeration] | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | Non-controlled/non-affiliate company investments | |
| Investment, Issuer Name [Extensible Enumeration] | whf:WhatIfMediaGroupLLCMember | whf:WhatIfMediaGroupLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Interactive Media & Services | Interactive Media & Services | Interactive Media & Services | Interactive Media & Services | Interactive Media & Services | Interactive Media & Services | Interactive Media & Services | Interactive Media & Services | |
| Acquisition Date | Jul. 02, 2021 | Jul. 02, 2021 | |||||||
| Principal/Share Amount | $ 851 | $ 8 | |||||||
| Investments, amortized cost | 851 | 850 | |||||||
| Investments, at fair value | $ 1,943 | $ 1,398 | |||||||
| Percent of net assets | 0.58% | 0.40% | 0.58% | 0.58% | 0.58% | 0.40% | 0.40% | 0.40% | |
| Investment, Restriction Status [true false] | true | true | true | true | true | true | true | true | |
| Investment, Significant Unobservable Input [true false] | true | true | true | true | true | true | true | true | |
| Investment, Non-income Producing [true false] | false | false | false | false | false | false | false | false | |
ORGANIZATION
| ORGANIZATION | 12 Months Ended |
| Dec. 31, 2022 | |
| ORGANIZATION | |
| ORGANIZATION | NOTE 1 – ORGANIZATION WhiteHorse Finance, Inc. (“WhiteHorse Finance” and, together with its subsidiaries, the “Company”) is an externally managed, non-diversified, closed-end management investment company that has elected to be treated as a business development company under the Investment Company Act of 1940, as amended (the “1940 Act”). In addition, for tax purposes, WhiteHorse Finance elected to be treated as a regulated investment company (“RIC”) under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Code”). WhiteHorse Finance’s common stock trades on the Nasdaq Global Select Market under the symbol “WHF.” The Company’s investment objective is to generate attractive risk-adjusted returns primarily by originating and investing in senior secured loans, including first lien and second lien facilities, to performing lower middle market companies across a broad range of industries that typically carry a floating interest rate based on a risk-free index rate such as LIBOR or SOFR and have a term of three WhiteHorse Finance’s investment activities are managed by H.I.G. WhiteHorse Advisers, LLC (“WhiteHorse Advisers” or the “Investment Adviser”). H.I.G. WhiteHorse Administration, LLC (“WhiteHorse Administration” or the “Administrator”) provides administrative services necessary for the Company to operate. Engaging in commodity interest transactions such as swap transactions or futures contracts for the Company may cause WhiteHorse Advisers to fall within the definition of “commodity pool operator” under the Commodity Exchange Act (the “CEA”) and related regulations promulgated by the U.S. Commodity Futures Trading Commission (the “CFTC”). On January 23, 2020, WhiteHorse Advisers claimed an exclusion from the definition of the term “commodity pool operator” under the CEA and the CFTC regulations in connection with its management of the Company (the “Exclusion”) and, therefore, WhiteHorse Advisers is not subject to CFTC registration or regulation under the CEA as a commodity pool operator with respect to its management of the Company. WhiteHorse Advisers has affirmed the Exclusion on January 24, 2023 and intends to continue to affirm the Exclusion on an annual basis. |
SUMMARY OF SIGNIFICANT ACCOUNTI
| SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES | 12 Months Ended |
| Dec. 31, 2022 | |
| SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES | |
| SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES | NOTE 2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation Financial Services - Investment Companies Additionally, the accompanying consolidated financial statements and related financial information have been prepared pursuant to the requirements for reporting on Form 10-K and Articles 6, 10 and 12 of Regulation S-X. In the opinion of management, the consolidated financial statements reflect all adjustments, consisting solely of normal recurring accruals considered necessary for the fair presentation of financial results as of and for the periods presented. Principles of Consolidation Use of Estimates Fair Value of Financial Instruments The Company values its investments in accordance with the 1940 Act and Rule 2a-5 thereunder, which sets forth the requirements for determining fair value in good faith. Pursuant to Rule 2a-5, the board of directors has designated the Investment Adviser to determine the fair value of the Company’s investments. The board of directors oversees the Investment Adviser’s performance of its valuation responsibilities, and in support of this oversight, the Investment Adviser provides periodic reports to the Company’s board of directors related to the fair valuation process. The Investment Adviser carries out its responsibilities as valuation designee primarily through its valuation committee (the “Valuation Committee”), assisted by third-party valuation firms, administrative personnel, and other service providers, as appropriate. The Valuation Committee consists of a number of representatives from different functions of the Investment Adviser. The Investment Adviser conducts the fair valuation process on a quarterly basis, subject to the oversight of the Company’s board of directors through the audit committee, using consistently applied valuation procedures. In accordance with the Company’s valuation procedures, the Investment Adviser performs periodic testing of the appropriateness and accuracy of fair value methodologies, and has established a process for approving, monitoring, and evaluating independent pricing service providers. Effective September 8, 2022, the board of directors designated the Investment Adviser as the Company’s valuation designee. Investments that are not publicly traded or for which market prices are not readily available will be valued based on the input of the Investment Adviser and independent third-party valuation firms engaged to review Company investments. These external reviews are used by the Company’s Investment Adviser, subject to the oversight of the board of directors, to review the Company’s internal valuation of investments during the year. Investment Transactions Foreign currency translation (1) cash and cash equivalents, restricted cash and cash equivalents, fair value of investments, interest receivable, and other assets and liabilities — at the spot exchange rate on the last business day of the period; and (2) purchases and sales of investments, income and expenses — at the exchange rates prevailing on the respective dates of such transactions. Although net assets and fair values are presented based on the applicable foreign exchange rates described above, the Company does not isolate that portion of the results of operations resulting from changes in foreign exchange rates on investments from the fluctuations arising from changes in fair values of investments held. Such fluctuations are included with the net realized and unrealized gain or loss from investments. Fluctuations arising from the translation of assets other than investments and liabilities are included with the net change in unrealized appreciation (depreciation) on translation of assets and liabilities in foreign currencies on the consolidated statements of operations. Foreign security and currency transactions may involve certain considerations and risks not typically associated with investing in U.S. companies. These risks include, but are not limited to, currency fluctuations and revaluations and future adverse political, social and economic developments, which could cause investments in foreign markets to be less liquid and prices to be more volatile than those of comparable U.S. companies or U.S. government securities. Revenue Recognition Sales Investment Income Dividend income is recorded on the record date for private portfolio companies or on the ex-dividend date for publicly traded portfolio companies. Closing fees associated with investments in portfolio companies are deferred and recognized as interest income over the respective terms of the applicable loans. Upon the prepayment of a loan or debt security, any unamortized loan closing fees are recorded as part of interest income. Commitment fees are based upon the undrawn portion committed by the Company and are recorded as interest income on an accrual basis. Prepayment, amendment and other fees are recognized when earned, generally when such fees are receivable, and are included in fee income on the consolidated statements of operations. The Company may invest in loans that contain a PIK interest rate provision. PIK interest is accrued at the contractual rates and added to loan principal on the reset dates to the extent such amounts are expected to be collected. Non-accrual loans Cash and Cash Equivalents Restricted Cash and Cash Equivalents Offering Costs Deferred Financing Costs Income Taxes The Company recognizes the financial statement benefit of a tax position only after determining that the relevant tax authority would more-likely-than-not sustain the position following an audit. For tax positions meeting the more-likely-than-not threshold, the amount recognized in the financial statement is the largest benefit or expense that has a greater than 50% likelihood of being realized upon ultimate settlement with the relevant tax authority. Any tax positions not deemed to satisfy the more-likely-than-not threshold are reversed and recorded as tax benefit or tax expense, as appropriate, in the current year. Management has analyzed the Company’s tax positions, and the Company has concluded that the Company did not have any unrecognized tax benefits or unrecognized tax liabilities related to uncertain tax positions as of December 31, 2022 and December 31, 2021. Penalties or interest that may be assessed related to any income taxes would be classified as general and administrative expenses on the consolidated statements of operations. The Company had no amounts accrued for interest or penalties as of December 31, 2022 or December 31, 2021. The Company does not expect the total amount of unrecognized tax benefits to significantly change in the next twelve months. The Company’s tax returns are subject to examination by federal, state and local taxing authorities. Because many types of transactions are susceptible to varying interpretations under U.S. federal and state income tax laws and regulations, the amounts reported in the accompanying consolidated financial statements may be subject to change at a later date by the respective taxing authorities. Tax returns for each of the federal tax years since 2019 remain subject to examination by the Internal Revenue Service. Dividends and Distributions The Company maintains an “opt out” dividend reinvestment plan (“DRIP”) for common stockholders. As a result, if the Company declares a distribution or other dividend, stockholders’ cash distributions will be automatically reinvested in additional shares of common stock, unless they specifically “opt out” of the DRIP so as to receive cash distributions. Earnings per Share Risks and Uncertainties Reclassifications Recent Accounting Pronouncements Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848) Facilitation of the Effects of Reference Rate Reform on Financial Reporting Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848 |
FORWARD CURRENCY CONTRACTS
| FORWARD CURRENCY CONTRACTS | 12 Months Ended |
| Dec. 31, 2022 | |
| FORWARD CURRENCY CONTRACTS | |
| FORWARD CURRENCY CONTRACTS | NOTE 3 - FORWARD CURRENCY CONTRACTS The Company may enter into foreign currency forward contracts from time to time to facilitate settlement of purchases and sales of investments denominated in foreign currencies and to economically hedge the impact that an adverse change in foreign exchange rates would have on the value of the Company’s investments denominated in foreign currencies. A foreign currency forward contract is a commitment to purchase or sell a foreign currency at a future date at a negotiated forward rate. These contracts are marked-to-market by recognizing the difference between the contract forward exchange rate and the forward market exchange rate on the last day of the period presented as unrealized appreciation or depreciation. Realized gains or losses are recognized when forward contracts are settled. Risks arise as a result of the potential inability of the counterparties to meet the terms of their contracts. The Company attempts to limit counterparty risk by only dealing with well-known counterparties. The Company utilizes forward foreign currency exchange contracts to protect itself against fluctuations in exchange rates. The Company may choose to renew contracts quarterly unless otherwise settled by the Company or the counterparty. The following table provides a breakdown of our forward currency contracts for the years ended December 31, 2022 and 2021: Year ended December 31, 2022 2021 Realized gain (loss) on forward currency contracts $ — $ (3) Unrealized appreciation (depreciation) on forward currency contracts (3) — Total net realized and unrealized gains (losses) on forward currency contracts $ (3) $ (3) The value associated with unrealized gain or loss on open contracts is included in unrealized appreciation/depreciation on forward currency contracts within the statement of assets and liabilities. Open contracts as of December 31, 2022 were as follows: Counterparty Currency to be sold Currency to be purchased Settlement date Unrealized appreciation Unrealized depreciation Morgan Stanley C$ 327 CAD $ 241 USD 1/27/23 $ — $ — Morgan Stanley £ 59 GBP $ 69 USD 1/27/23 — (3) Total $ — $ (3) The following table is a summary of the average USD notional exposure to foreign currency forward contracts for the years ended December 31, 2022 and 2021: Year ended December 31, Average USD notional outstanding 2022 2021 Forward currency contracts $ 208 $ 5,047 The foreign currency forward contracts open at the end of the period are generally indicative of the volume of activity during the period. The value associated with unrealized gain or loss on open contracts is included in unrealized appreciation or depreciation on forward currency contracts within the consolidated statements of assets and liabilities. Offsetting of Derivative Instruments The Company has derivative instruments that are subject to master netting agreements. These agreements include provisions to offset positions with the same counterparty in the event of default by one of the parties. The Company’s unrealized appreciation or depreciation on derivative instruments are reported as gross assets and liabilities, respectively, in the consolidated statements of assets and liabilities. The following tables present the Company’s assets and liabilities related to derivatives by counterparty, net of amounts available for offset under a master netting arrangement and net of any collateral received or pledged by the Company for such assets and liabilities as of December 31, 2022. As of December 31, 2022 Counterparty ($ in thousands) Derivative Assets Subject to Master Netting Agreement Derivative Liabilities Subject to Master Netting Agreement Derivatives Available for Offset Non-cash Collateral Received Non-cash Collateral Pledged (1) Cash Collateral Received (1) Cash Collateral Pledged (1) Net Amount of Derivative Assets (2) Net Amount of Derivative Liabilities (3) Morgan Stanley (CAD) $ — $ — $ — $ — $ — $ — $ — $ — $ — Morgan Stanley (GBP) — 3 — — — — — — 3 Total $ — $ 3 $ — $ — $ — $ — $ — $ — $ 3 (1) In some instances, the actual amount of the collateral received and/or pledged may be more than the amount shown due to overcollateralization. (2) Net amount of derivative assets represents the net amount due from the counterparty to the Company in the event of default. (3) Net amount of derivative liabilities represents the net amount due from the Company to the counterparty in the event of default. As of December 31, 2021, the Company did not have any outstanding derivative instruments . |
INVESTMENTS
| INVESTMENTS | 12 Months Ended |
| Dec. 31, 2022 | |
| INVESTMENTS | |
| INVESTMENTS | NOTE 4 - INVESTMENTS Investments consisted of the following: As of December 31, 2022 As of December 31, 2021 Amortized Cost Fair Value Amortized Cost Fair Value First lien secured loans $ 631,091 $ 618,267 $ 709,318 $ 697,232 Second lien secured loans 24,685 20,634 25,484 23,650 Subordinated unsecured loans 167 167 167 167 Subordinated Note to STRS JV 80,000 80,000 60,000 60,000 Equity (excluding STRS JV) 26,486 21,000 21,991 22,552 Equity in STRS JV 20,000 20,160 15,000 15,607 Total $ 782,429 $ 760,228 $ 831,960 $ 819,208 The following table shows the portfolio composition by industry grouping at fair value: Industry ($ in thousands) As of December 31, 2022 As of December 31, 2021 Advertising $ 154 — % $ 9,738 1.3 % Air Freight & Logistics 16,107 2.4 21,379 2.9 Alternative Carriers 12,068 1.8 — — Application Software 27,117 4.1 22,590 3.0 Asset Management & Custody Banks 10,144 1.5 — — Automotive Retail 14,363 2.2 15,286 2.1 Broadcasting 7,780 1.2 8,027 1.1 Building Products 24,362 3.7 44,184 5.9 Cable & Satellite 20,489 3.1 14,526 2.0 Commodity Chemicals 20,410 3.1 15,172 2.0 Construction & Engineering — — 11,086 1.5 Construction Materials 7,459 1.1 7,673 1.0 Consumer Finance — — 9,628 1.3 Data Processing & Outsourced Services 22,817 3.5 32,864 4.4 Department Stores — — 13,538 1.8 Distributors 4,171 0.6 4,025 0.5 Diversified Chemicals 13,268 2.0 18,360 2.5 Diversified Support Services 11,035 1.7 11,618 1.6 Education Services 12,869 1.9 13,398 1.8 Electric Utilities 10,411 1.7 10,296 1.4 Electronic Equipment & Instruments — — 6,687 0.9 Environmental & Facilities Services 18,459 2.8 32,998 4.4 Health Care Facilities 10,131 1.5 25,576 3.4 Health Care Services 23,333 3.5 58,055 7.8 Health Care Supplies 23,090 3.5 — — Heavy Electrical Equipment 14,520 2.2 11,088 1.5 Home Furnishings 24,780 3.8 24,017 3.2 Household Appliances 6,615 1.0 — — Household Products 11,153 1.7 11,773 1.6 Industrial Machinery 9,874 1.5 — — Interactive Media & Services 9,488 1.4 20,157 2.7 Internet & Direct Marketing Retail 37,191 5.6 45,668 6.1 Investment Banking & Brokerage 18,240 2.8 19,603 2.6 IT Consulting & Other Services 15,408 2.3 19,162 2.6 Leisure Facilities 21,979 3.3 22,142 3.0 Leisure Products 13,366 2.0 3,072 0.4 Life Sciences Tools & Services 4,824 0.8 4,925 0.7 Office Services & Supplies 25,832 3.9 20,921 2.8 Other Diversified Financial Services 3,788 0.7 3,492 0.5 Packaged Foods & Meats 10,941 1.7 10,862 1.5 Paper Packaging 283 0.1 — — Personal Products 13,482 2.0 12,260 1.6 Real Estate Development 8,103 1.2 — — Real Estate Operating Companies 5,909 0.9 5,431 0.7 Research & Consulting Services 21,896 3.3 23,822 3.2 Specialized Consumer Services 37,819 5.7 36,225 4.9 Specialized Finance (1) — — — — Systems Software 17,847 2.7 19,160 2.6 Technology Hardware, Storage & Peripherals 16,693 2.5 23,117 3.1 Total (1) $ 660,068 100.0 % $ 743,601 100.0 % (1) Excludes investments in STRS JV. As of December 31, 2022, the portfolio companies underlying the investments are all located in the United States and its territories, except for JZ Capital Partners Ltd., which is domiciled in Guernsey, Solar Holdings Bidco Limited, which is domiciled in the United Kingdom, and Arcole Holding Corporation and Trimlite Buyer LLC, which are domiciled in Canada. As of December 31, 2022 and December 31, 2021, the weighted average remaining term of the Company’s debt investments, excluding non-accrual investments, were approximately 3.4 years and 3.8 years, respectively. As of December 31, 2022, there were no loans on non-accrual status. As of December 31, 2021, the total fair value of non-accrual loans was $10,046. An affiliated company is generally a portfolio company in which the Company owns 5% or more of its voting securities. A controlled affiliated company is generally a portfolio company in which the Company owns more than 25% of its voting securities or has the power to exercise control over its management or policies (including through a management agreement). The following table presents the schedule of investments in and advances to affiliated and controlled persons (as defined by the 1940 Act) as of and for the year ended December 31, 2022: Dividends and Beginning Net Change in Ending Fair interest Fair Value at Net Unrealized Value at Type of included in December 31, Realized Appreciation December 31, Affiliated Person (1) Asset income 2021 Purchases Sales Gain (Loss) (Depreciation) 2022 Non-controlled affiliates Arcole Holding Corporation Equity $ 321 $ 6,874 $ — $ — $ — $ (494) $ 6,380 PlayMonster LLC First Lien Secured Revolving Loan 13 — 1,088 (1,088) — — — Playmonster Group LLC Priority First Lien Secured Loan 1 — 176 — — — 176 Playmonster Group LLC First Lien Secured Loan 325 — 3,662 — — (685) 2,977 Playmonster Group Equity, Inc. (d/b/a PlayMonster) Preferred Equity — — 3,600 — — (3,600) — Playmonster Group Equity, Inc. (d/b/a PlayMonster) Common Equity — — 460 — — (460) — Total Non-controlled affiliates $ 660 $ 6,874 $ 8,986 $ (1,088) $ — $ (5,239) $ 9,533 Controlled affiliates WHF STRS Ohio Senior Loan Fund LLC* Subordinated Note $ 6,385 $ 60,000 $ 20,000 $ — $ — $ — $ 80,000 WHF STRS Ohio Senior Loan Fund LLC* Equity 6,977 15,607 5,000 — — (447) 20,160 Total Controlled affiliates $ 13,362 $ 75,607 $ 25,000 $ — $ — $ (447) $ 100,160 * The Company and STRS Ohio are the members of STRS JV, a joint venture formed as a Delaware limited liability company that is not consolidated by either member for financial reporting purposes. The members make investments in STRS JV in the form of limited liability company (“LLC”) equity interests and interest-bearing subordinated notes as STRS JV makes investments, and all portfolio and other material decisions regarding STRS JV must be submitted to STRS JV’s board of managers which is comprised of an equal number of members appointed by each of the Company and STRS Ohio. Because management of STRS JV is shared equally between the Company and STRS Ohio, the Company does not believe it controls STRS JV for purposes of the 1940 Act or otherwise. (1) Refer to the consolidated schedule of investments for the principal amount, industry classification and other security detail of each portfolio company. On January 24, 2022, as part of a restructuring agreement between the Company and PlayMonster LLC, the Company’s first lien secured term loan and delayed draw loan investments to PlayMonster LLC, with a total cost basis of $7,045, converted into a new first lien secured term loan, preferred stock and common stock of Playmonster Group LLC. On June 24, 2022, the PlayMonster LLC first lien secured revolving loan investment was fully realized. A portion of the PlayMonster LLC first lien secured revolving loan investment restructured into the existing Playmonster Group LLC first lien secured term loan, with a total cost basis of $437. For the year ended December 31, 2022, the Company recovered $1,725 on an equity investment to the RCS Creditor Trust Class B Units and is reported as a non-controlled affiliate realized gain in the consolidated statements of operations. The Company previously recovered $562 on the RCS Creditor Trust Class B Units during the year ended December 31, 2021. The following table presents the schedule of investments in and advances to affiliated and controlled affiliated persons (as defined by the 1940 Act) as of and for the year ended December 31, 2021: Dividends and Beginning Fair Net Change in Ending Fair interest Value at Net Unrealized Value at Type of included in December 31, Realized Appreciation December 31, Affiliated Person (1) Asset income 2020 Purchases Sales Gain (Loss) (Depreciation) 2021 Non-controlled affiliates Arcole Holding Corporation Equity $ 897 $ 6,448 $ — $ — $ — $ 426 $ 6,874 NMFC Senior Loan Program I LLC Units Equity 293 9,269 — (10,000) — 761 — Total Non-controlled affiliates $ 1,190 $ 15,717 $ — $ (10,000) $ — $ 1,187 $ 6,874 Controlled affiliates WHF STRS Ohio Senior Loan Fund LLC* Subordinated Note $ 3,307 $ 41,073 $ 18,927 $ — $ — $ — $ 60,000 WHF STRS Ohio Senior Loan Fund LLC* Equity 4,907 10,167 4,732 — — 708 15,607 Total Controlled affiliates $ 8,214 $ 51,240 $ 23,659 $ — $ — $ 708 $ 75,607 * The Company and STRS Ohio are the members of STRS JV, a joint venture formed as a Delaware limited liability company that is not consolidated by either member for financial reporting purposes. The members make investments in STRS JV in the form of limited liability company (“LLC”) equity interests and interest-bearing subordinated notes as STRS JV makes investments, and all portfolio and other material decisions regarding STRS JV must be submitted to STRS JV’s board of managers which is comprised of an equal number of members appointed by each of the Company and STRS Ohio. Because management of STRS JV is shared equally between the Company and STRS Ohio, the Company does not believe it controls STRS JV for purposes of the 1940 Act or otherwise. (1) Refer to the consolidated schedule of investments for the principal amount, industry classification and other security detail of each portfolio company. WHF STRS Ohio Senior Loan Fund LLC On January 14, 2019, the Company entered into an LLC operating agreement with STRS Ohio to co-manage a newly formed joint venture investment company, STRS JV, a Delaware LLC. STRS Ohio and the Company committed to provide up to $125,000 of subordinated notes and equity to STRS JV, with STRS Ohio providing up to $50,000 and the Company providing up to $75,000, respectively. In July 2019, STRS JV formally launched operations. STRS JV invests primarily in lower middle market, senior secured debt facilities, to performing lower middle market companies across a broad range of industries that typically carry a floating interest index rate such as LIBOR or SOFR and have a term of three In February 2022, the Company increased its capital commitment to the STRS JV in the amount of an additional $25,000, which brought the Company’s total capital commitment to $100,000, comprised of $80,000 of subordinated notes and $20,000 of LLC equity interests. In connection with this increase in the Company’s capital commitment, the Company and STRS Ohio’s amended economic ownership in the STRS JV is approximately 66.67% and 33.33%, respectively. As of December 31, 2022 and December 31, 2021, STRS JV had total assets of $305,296 and $273,523, respectively. STRS JV’s portfolio consisted of debt investments in 28 portfolio companies as of December 31, 2022 and December 31, 2021. As of December 31, 2022 and December 31, 2021, the largest investment by aggregate principal amount (including any unfunded commitments) in a single portfolio company in STRS JV’s portfolio was $20,086 and $23,483, respectively. The five largest investments in portfolio companies by fair value in STRS JV totaled $77,635 and $83,057 as of December 31, 2022 and December 31, 2021, respectively. STRS JV invests in portfolio companies in the same industries in which the Company may directly invest. The Company provides capital to STRS JV in the form of LLC equity interests and through interest-bearing subordinated notes. As of December 31, 2022, the Company and STRS Ohio owned 66.67% and 33.33%, respectively, of the LLC equity interests of STRS JV. As of December 31, 2021, the Company and STRS Ohio owned 60% and 40%, respectively, of the LLC equity interests of STRS JV. The Company’s investment in STRS JV consisted of equity contributions of $20,000 and $15,000 and advances of the subordinated notes of $80,000 and $60,000 as of December 31, 2022 and December 31, 2021, respectively. As of December 31, 2022, the Company had commitments to fund equity interests and subordinated notes in STRS JV of $20,000 and $80,000, respectively, both of which were fully funded. As of December 31, 2021, the Company had commitments to fund equity interests and subordinated notes in STRS JV of $15,000 and $60,000, respectively, both of which were fully funded. The Company and STRS Ohio each appoint two members to STRS JV’s four-person board of managers. All material decisions with respect to STRS JV, including those involving its investment portfolio, require unanimous approval of a quorum of the board of managers. Quorum is defined as (i) the presence of two members of the board of managers; provided that at least one individual is present that was elected, designated or appointed by each member; (ii) the presence of three members of the board of managers; provided that the individual that was elected, designated or appointed by the member with only one individual present shall be entitled to cast two votes on each matter; or (iii) the presence of four members of the board of managers; provided that two individuals are present that were elected, designated or appointed by each member. On July 19, 2019, STRS JV entered into a $125,000 credit and security agreement (the “STRS JV Credit Facility”) with JPMorgan Chase Bank, National Association (“JPMorgan”). On January 27, 2021, the terms of the STRS JV Credit Facility were amended to, among other things, increase the size of the STRS JV Credit Facility from $125,000 to $175,000. On April 28, 2021, the terms of the STRS JV Credit Facility were amended and restated to, among other things, enable borrowings in British pounds or euros. On July 15, 2021, the terms of the STRS JV Credit Facility were amended to, among other things, allow STRS JV to reduce the applicable margins for interest rates to 2.35%, extend the non-call period from January 19, 2022 to January 19, 2023, extend the end of the reinvestment period from July 19, 2022 to July 19, 2023 and extend the scheduled termination date from July 19, 2024 to July 19, 2025. On March 11, 2022, the terms of the STRS JV Credit Facility were further amended to, among other things, (i) permanently increase STRS Credit’s availability under the Credit Facility from $175,000 to $225,000, (ii) increase the minimum funding amount from $131,250 to $168,750, and (iii) apply an annual interest rate equal to the applicable SOFR plus 2.50% to borrowings greater than $175,000 in the Credit Facility. As of December 31, 2022, the STRS JV Credit Facility had $225,000 of commitments subject to leverage and borrowing base restrictions with an interest rate based on a risk-free index rate such as LIBOR, SONIA or CDOR plus 2.35% for borrowings up to $175,000 and SOFR plus 2.50% for borrowings above $175,000. The final maturity date of the STRS JV Credit Facility is July 19, 2025. As of December 31, 2022, STRS JV had $152,277 of outstanding borrowings and an interest rate outstanding of 6.6% per annum under the STRS JV Credit Facility. As of December 31, 2021, the STRS JV Credit Facility had $175,000 of commitments subject to leverage and borrowing base restrictions with an interest rate based on a floating index rate such as LIBOR, SONIA or CDOR plus 2.35%. As of December 31, 2021, STRS JV had $146,782 of outstanding borrowings and an interest rate outstanding of 2.5% per annum under the STRS JV Credit Facility. Below is a listing of STRS JV’s individual investments as of December 31, 2022: Issuer Investment Type (1) Floor Reference Rate (2) Spread Above Index Interest Rate (3) Acquisition Date (4) Maturity Date Principal/ Share Amount Amortized Cost Fair Value (5) Fair Value As A Percentage of Members' Equity North America Debt Investments Advertising I&I Sales Group, LLC (d/b/a Avision Sales Group) First Lien Secured Term Loan 1.00% LIBOR 5.75% 10.48% 02/18/22 12/15/26 9,193 $ 9,047 $ 9,007 29.79 % I&I Sales Group, LLC (d/b/a Avision Sales Group) (6) First Lien Secured Delayed Draw Loan 1.00% LIBOR 5.75% 10.43% 03/11/22 12/15/26 2,756 2,713 2,699 8.93 I&I Sales Group, LLC (d/b/a Avision Sales Group) First Lien Secured Revolving Loan 1.00% LIBOR 5.75% 10.43% 02/18/22 12/15/26 — — (3) — 11,760 11,703 38.70 Air Freight & Logistics ITS Buyer Inc. First Lien Secured Term Loan 1.00% LIBOR 6.00% 10.73% 02/17/22 06/15/26 3,577 3,523 3,542 11.71 ITS Buyer Inc. First Lien Secured Revolving Loan 1.00% LIBOR 6.00% 10.73% 02/17/22 06/15/26 — — 3 0.01 3,523 3,545 11.72 Application Software MEP-TS Midco, LLC (d/b/a Tax Slayer) First Lien Secured Term Loan 1.00% LIBOR 6.00% 10.38% 01/21/21 12/31/26 13,353 13,162 13,353 44.16 MEP-TS Midco, LLC (d/b/a Tax Slayer) First Lien Secured Revolving Loan 1.00% LIBOR 6.00% 10.38% 01/21/21 12/31/26 — — 22 0.07 13,162 13,375 44.23 Building Products Drew Foam Companies Inc First Lien Secured Term Loan 1.00% SOFR 6.75% 11.48% 11/09/20 11/05/25 14,270 14,105 14,132 46.73 14,105 14,132 46.73 Construction & Engineering Road Safety Services, Inc. First Lien Secured Term Loan 1.00% SOFR 6.50% 10.92% 12/31/19 03/18/25 8,603 8,522 8,432 27.88 8,522 8,432 27.88 Data Processing & Outsourced Services Geo Logic Systems Ltd. (7) First Lien Secured Term Loan 1.00% CDOR 6.50% 11.38% 01/22/20 12/19/24 20,088 15,413 14,545 48.10 Geo Logic Systems Ltd. (7) First Lien Secured Revolving Loan 1.00% CDOR 6.50% 11.38% 01/22/20 12/19/24 — — (9) (0.03) 15,413 14,536 48.07 Diversified Support Services Quest Events, LLC First Lien Secured Term Loan 1.00% LIBOR 6.00% 10.73% 07/19/19 12/28/24 11,805 11,728 11,298 37.36 Quest Events, LLC First Lien Secured Revolving Loan 1.00% LIBOR 6.00% 10.73% 07/19/19 12/28/24 468 464 431 1.43 12,192 11,729 38.79 Electronic Equipment & Instruments LMG Holdings, Inc. First Lien Secured Term Loan 1.00% LIBOR 6.50% 11.23% 06/28/21 04/30/26 13,466 13,284 13,193 43.63 LMG Holdings, Inc. First Lien Secured Revolving Loan 1.00% LIBOR 6.50% 11.23% 06/28/21 04/30/26 — — (6) (0.02) 13,284 13,187 43.61 Environmental & Facilities Services Juniper Landscaping Holdings LLC First Lien Secured Term Loan 1.00% LIBOR 6.00% 11.15% 03/01/22 12/29/26 11,306 11,147 11,079 36.64 Juniper Landscaping Holdings LLC (6) First Lien Secured Delayed Draw Loan 1.00% LIBOR 6.00% 11.14% 03/01/22 12/29/26 1,909 1,882 1,868 6.18 Juniper Landscaping Holdings LLC First Lien Secured Revolving Loan 1.00% LIBOR 6.00% 10.54% 03/01/22 12/29/26 298 294 287 0.95 WH Lessor Corp. (d/b/a Waste Harmonics, LLC) First Lien Secured Term Loan 1.00% LIBOR 5.59% 9.97% 01/22/20 12/26/24 7,470 7,402 7,470 24.70 WH Lessor Corp. (d/b/a Waste Harmonics, LLC) First Lien Secured Revolving Loan 1.00% LIBOR 5.59% 9.97% 01/22/20 12/26/24 — — 4 0.01 20,725 20,708 68.48 Issuer Investment Type (1) Floor Reference Rate (2) Spread Above Index Interest Rate (3) Acquisition Date (4) Maturity Date Principal/ Share Amount Amortized Cost Fair Value (5) Fair Value As A Percentage of Members' Equity Household Appliances Smalto Inc. (d/b/a PEMCO International) (9) First Lien Secured Term Loan 1.00% EurIBOR 6.25% 9.00% 05/04/22 04/28/28 6,642 $ 6,865 $ 6,899 22.81 % Smalto Inc. (d/b/a PEMCO International) First Lien Secured Term Loan 1.00% SOFR 6.00% 11.04% 05/04/22 04/28/28 1,012 994 986 3.26 7,859 7,885 26.08 Industrial Machinery BLP Buyer, Inc. (d/b/a Bishop Lifting Products, Inc.) First Lien Secured Term Loan 1.25% SOFR 6.25% 10.49% 02/18/22 02/01/27 8,188 8,054 7,939 26.25 BLP Buyer, Inc. (d/b/a Bishop Lifting Products, Inc.) First Lien Secured Revolving Loan 1.00% SOFR 6.25% 10.67% 02/18/22 02/01/27 274 270 259 0.86 Pennsylvania Machine Works, LLC (d/b/a Penn Western) First Lien Secured Term Loan 1.00% SOFR 6.25% 11.09% 03/25/22 03/08/27 6,907 6,821 6,801 22.49 15,145 14,999 49.60 Internet & Direct Marketing Retail Marlin DTC-LS Midco 2, LLC (d/b/a Clarus Commerce, LLC) First Lien Secured Term Loan 1.00% LIBOR 6.50% 11.23% 07/19/19 07/01/25 19,105 18,920 19,105 63.18 Marlin DTC-LS Midco 2, LLC (d/b/a Clarus Commerce, LLC) First Lien Secured Revolving Loan 1.00% LIBOR 6.50% 11.23% 07/19/19 07/01/25 — — 8 0.03 18,920 19,113 63.21 Investment Banking & Brokerage TOUR Intermediate Holdings, LLC First Lien Secured Term Loan 1.00% LIBOR 6.50% 10.88% 05/19/20 05/15/25 3,077 3,049 3,077 10.18 TOUR Intermediate Holdings, LLC First Lien Secured Delayed Draw Loan 1.00% LIBOR 6.50% 10.88% 05/19/20 05/15/25 2,468 2,458 2,468 8.16 5,507 5,545 18.34 IT Consulting & Other Services Cennox Holdings Limited (d/b/a Cennox) (8) First lien Secured Term Loan 1.00% LIBOR 6.00% 10.02% 07/16/21 05/04/26 2,837 3,863 3,343 11.06 Cennox Holdings Limited (d/b/a Cennox) (9) First lien Secured Term Loan 1.00% LIBOR 6.25% 10.99% 06/28/22 05/04/26 9,458 9,834 9,926 32.83 Cennox Holdings Limited (d/b/a Cennox) (8) First lien Secured Revolving Loan 1.00% LIBOR 6.00% 10.99% 07/16/21 05/04/26 — — (161) (0.53) RCKC Acquisitions LLC (d/b/a KSM Consulting, LLC) First Lien Secured Term Loan 1.00% LIBOR 6.25% 10.98% 01/27/21 12/31/26 11,150 11,000 10,929 36.14 RCKC Acquisitions LLC (d/b/a KSM Consulting, LLC) First Lien Secured Delayed Draw Loan 1.00% LIBOR 6.25% 10.65% 01/27/21 12/31/26 3,007 2,963 2,947 9.75 RCKC Acquisitions LLC (d/b/a KSM Consulting, LLC) (6) First Lien Secured Revolving Loan 1.00% LIBOR 6.25% 10.60% 01/27/21 12/31/26 533 526 517 1.71 Turnberry Solutions, Inc. First Lien Secured Term Loan 1.00% SOFR 6.00% 9.19% 08/10/21 09/02/26 6,087 5,998 5,964 19.72 Turnberry Solutions, Inc. First Lien Secured Revolving Loan 1.00% SOFR 6.00% 9.19% 08/10/21 09/02/26 — — (4) (0.01) 34,184 33,461 110.66 Packaged Foods & Meats Poultry Holdings LLC (HPP) First Lien Secured Term Loan 1.00% SOFR 7.25% 11.67% (10.17% Cash + 1.50% PIK) 10/21/19 06/28/25 7,162 7,101 7,011 23.19 Stella & Chewy's LLC First Lien Secured Term Loan 1.00% SOFR 8.75% 13.40% (11.40% Cash + 2.00% PIK) 12/29/20 12/16/25 3,893 3,849 3,738 12.36 Stella & Chewy's LLC First Lien Secured Delayed Draw Loan 1.00% SOFR 8.75% 13.17% (11.17% Cash + 2.00% PIK) 03/26/21 12/16/25 1,375 1,362 1,320 4.37 12,312 12,069 39.91 Paper Packaging Max Solutions, Inc. First Lien Secured Term Loan 1.00% SOFR 6.50% 11.23% 10/07/22 09/29/28 8,244 8,085 8,085 26.74 Max Solutions, Inc. (6) First Lien Secured Delayed Draw Loan 1.00% SOFR 6.50% 11.23% 10/07/22 09/29/28 — — (26) (0.09) Max Solutions, Inc. (10) First Lien Secured Revolving Loan 1.00% CDOR 6.50% 11.23% 10/07/22 09/29/28 — — — — Max Solutions, Inc. (6) First Lien Secured Revolving Loan 1.00% SOFR 6.50% 11.23% 10/07/22 09/29/28 — — — — 8,085 8,059 26.65 Issuer Investment Type (1) Floor Reference Rate (2) Spread Above Index Interest Rate (3) Acquisition Date (4) Maturity Date Principal/ Share Amount Amortized Cost Fair Value (5) Fair Value As A Percentage of Members' Equity Personal Products Sunless, Inc. First Lien Secured Term Loan 1.00% LIBOR 6.50% 11.23% 10/21/19 08/13/25 3,679 $ 3,631 $ 3,679 12.18 % Sunless, Inc. (6) First Lien Secured Revolving Loan 1.00% LIBOR 6.50% 11.24% 10/21/19 08/13/25 266 264 270 0.89 3,895 3,949 13.06 Pharmaceuticals Meta Buyer LLC (d/b/a Metagenics, Inc.) (9) First Lien Secured Term Loan 1.00% EurIBOR 6.00% 8.17% 12/16/21 11/01/27 12,287 13,643 12,876 42.57 Meta Buyer LLC (d/b/a Metagenics, Inc.) First Lien Secured Term Loan 1.00% SOFR 6.00% 10.62% 12/16/21 11/01/27 981 966 963 3.18 Meta Buyer LLC (d/b/a Metagenics, Inc.) First Lien Secured Delayed Draw Loan 1.00% SOFR 6.00% 10.81% 10/01/22 11/01/27 892 878 876 2.90 Meta Buyer LLC (d/b/a Metagenics, Inc.) First Lien Secured Revolving Loan 1.00% SOFR 6.00% 10.81% 12/16/21 11/01/27 — — (3) (0.01) 15,487 14,712 48.65 Real Estate Operating Companies HRG Management, LLC (d/b/a HomeRiver Group, LLC) First Lien Secured Term Loan 1.00% LIBOR 6.25% 10.48% 12/28/21 10/19/26 9,653 9,505 9,412 31.13 HRG Management, LLC (d/b/a HomeRiver Group, LLC) (6)(11) First Lien Secured Delayed Draw Loan 1.00% Base Rate 6.10% 10.92% 02/18/22 10/19/26 1,768 1,741 1,720 5.69 HRG Management, LLC (d/b/a HomeRiver Group, LLC) First Lien Secured Revolving Loan 1.00% LIBOR 6.25% 10.48% 02/18/22 10/19/26 — — (11) (0.04) 11,246 11,121 36.78 Real Estate Services NPAV Lessor Corp. (d/b/a Nationwide Property & Appraisal Services, LLC) First Lien Secured Term Loan 1.00% SOFR 6.50% 10.92% 03/01/22 01/21/27 8,924 8,778 8,301 27.45 NPAV Lessor Corp. (d/b/a Nationwide Property & Appraisal Services, LLC) First Lien Secured Revolving Loan 1.00% SOFR 6.50% 10.92% 03/01/22 01/21/27 290 285 247 0.82 9,063 8,548 28.27 Research & Consulting Services E-Phoenix Acquisition Co. Inc. (d/b/a Integreon, Inc.) First Lien Secured Term Loan 1.00% LIBOR 5.50% 10.23% 07/15/21 06/23/27 8,865 8,782 8,686 28.72 8,782 8,686 28.72 Technology Hardware, Storage & Peripherals Source Code Holdings, LLC (d/b/a Source Code Corporation) First Lien Secured Term Loan 1.00% SOFR 6.50% 10.92% 08/10/21 07/30/27 15,105 14,874 14,882 49.21 Source Code Holdings, LLC (d/b/a Source Code Corporation) (6) First Lien Secured Delayed Draw Loan 1.00% SOFR 6.50% 10.92% 08/10/21 07/30/27 — — 2 0.01 14,874 14,884 49.22 Trading Companies & Distributors LINC Systems, LLC First Lien Secured Term Loan 1.00% LIBOR 6.25% 10.42% 06/22/21 02/24/26 10,033 9,895 9,882 32.68 LINC Systems, LLC First Lien Secured Revolving Loan 1.00% LIBOR 6.25% 10.42% 06/22/21 02/24/26 — — (1) (0.00) 9,895 9,881 32.68 Total Investments $ 287,940 $ 284,259 940.04 % (1) Except as noted, all investments provide collateral for the STRS JV Credit Facility. (2) The investments bear interest at a rate that may be determined by reference to LIBOR, which resets monthly, quarterly or semiannually, SOFR, CDOR, Prime, Euro Interbank Offered Rate (“EurIBOR” or “E”). (3) The interest rate is the “all-in-rate” including the current index and spread, the fixed rate, and the PIK interest rate, as the case may be. (4) Except as otherwise noted, all of the STRS JV’s portfolio company investments, which as of the date of the portfolio represented 940% of STRS JV’s members’ equity or 93% of STRS JV’s total assets, are subject to legal restrictions on sales. (5) The fair value of each investment was determined using significant unobservable inputs. (6) The investment or a portion of the investment does not provide collateral for the STRS JV Credit Facility. (7) Principal amount is denominated in Canadian dollars and the issuer is domiciled in Canada. (8) Principal amount is denominated in British Pounds and the issuer is domiciled in the United Kingdom. (9) Principal amount is denominated in Euros. (10) Principal amount is denominated in Canadian dollars. (11) The investment was comprised of two contracts, which were indexed to different base rates, L and P, respectively. The Floor, Spread Above Index and Interest Rate presented represent the weighted average of both contracts. Below is a listing of STRS JV’s individual investments as of December 31, 2021: Issuer Investment Type (1) Floor Spread Above Index (2) Interest Rate (3) Acquisition Date (4) Maturity Date Principal/ Share Amount Amortized Cost Fair Value (5) Fair Value As A Percentage of Member's Equity North America Debt Investments Application Software MEP-TS Midco, LLC (d/b/a Tax Slayer) First Lien Secured Term Loan 1.00% L+ 6.00% 7.00% 01/21/21 12/31/26 13,4 |
FAIR VALUE MEASUREMENTS
| FAIR VALUE MEASUREMENTS | 12 Months Ended |
| Dec. 31, 2022 | |
| FAIR VALUE MEASUREMENTS | |
| FAIR VALUE MEASUREMENTS | NOTE 5 – FAIR VALUE MEASUREMENTS Accounting standards establish a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard describes three levels of inputs that may be used to measure fair value: Level 1: Level 2: Level 3: In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, a financial instrument’s categorization within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the financial instrument. A review of the fair value hierarchy classifications is conducted on a quarterly basis. Changes in the observability of valuation inputs may result in a reclassification for certain financial assets or liabilities. Reclassifications impacting Level 3 of the fair value hierarchy are reported as transfers in or out of the Level 3 category as of the beginning of the quarter in which the reclassifications occur. During the year ended December 31, 2022 and year ended December 31, 2021, there were no changes in the observability of valuation inputs that would have resulted in a reclassification of assets between any levels. Fair value for each investment is derived using a combination of valuation methodologies that, in the judgment of the Investment Committee are most relevant to such investment, including, without limitation, being based on one or more of the following: (i) market prices obtained from market makers for which the Investment Committee has deemed there to be enough breadth (number of quotes) and depth (firm bids) to be indicative of fair value, (ii) the price paid or realized in a completed transaction or binding offer received in an arm’s-length transaction, (iii) a discounted cash flow analysis, (iv) the guideline public company method, (v) the similar transaction method or (vi) the option pricing method. The following table presents investments (as shown on the consolidated schedule of investments) that were measured at fair value as of December 31, 2022: Level 1 Level 2 Level 3 Total First lien secured loans $ — $ — $ 618,267 $ 618,267 Second lien secured loans — — 20,634 20,634 Subordinated unsecured loans — — 167 167 Subordinated Note to STRS JV — — 80,000 80,000 Equity (excluding STRS JV) — — 21,000 21,000 Equity in STRS JV (1) — — — 20,160 Total investments $ — $ — $ 740,068 $ 760,228 (1) The Company’s equity investment in STRS JV is measured using the net asset value per share as a practical expedient for fair value, and thus has not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the consolidated statements of assets and liabilities. The Company’s forward currency contracts, which were valued at ($3) as of December 31, 2022, are characterized in Level 2 of the hierarchy. The following table presents investments (as shown on the consolidated schedule of investments) that were measured at fair value as of December 31, 2021: Level 1 Level 2 Level 3 Total First lien secured loans $ — $ — $ 697,232 $ 697,232 Second lien secured loans — — 23,650 23,650 Subordinated unsecured loans — — 167 167 Subordinated Note to STRS JV — — 60,000 60,000 Equity (excluding STRS JV) — — 22,552 22,552 Equity in STRS JV (1) — — — 15,607 Total investments $ — $ — $ 803,601 $ 819,208 (1) The Company’s equity investment in STRS JV is measured using the NAV per share as a practical expedient for fair value, and thus has not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the consolidated statements of assets and liabilities. The following table presents the changes in investments measured at fair value using Level 3 inputs for the year ended December 31, 2022: First Lien Second Lien Subordinated Secured Secured Subordinated Notes to STRS Total Year ended December 31, 2022 Loans Loans Notes JV Equity Investments Fair value, beginning of period $ 697,232 $ 23,650 $ 167 $ 60,000 $ 22,552 $ 803,601 Funding of investments 278,236 — — 20,000 1,853 300,089 Non-cash interest income 2,217 138 — — — 2,355 Accretion of discount (premium) 5,540 86 — — — 5,626 Proceeds from paydowns and sales (343,181) — — — (4,900) (348,081) Conversions (4,060) — — — 4,060 — Realized gains (losses) (16,975) (1,024) — — 3,481 (14,518) Net unrealized (depreciation) appreciation (742) (2,216) — — (6,046) (9,004) Fair value, end of period $ 618,267 $ 20,634 $ 167 $ 80,000 $ 21,000 $ 740,068 Change in unrealized appreciation (depreciation) on investments still held as of December 31, 2022 $ (12,278) $ (3,241) $ — $ — $ (5,469) $ (20,988) The following table presents the changes in investments measured at fair value using Level 3 inputs for the year ended December 31, 2021: First Lien Second Lien Subordinated Secured Secured Subordinated Notes to STRS Total Year ended December 31, 2021 Loans Loans Notes JV Equity Investments Fair value, beginning of period $ 588,580 $ 27,596 $ — $ 41,073 $ 23,319 $ 680,568 Funding of investments 518,604 19,475 498 18,927 5,588 563,092 Non-cash interest income 1,159 5 — — — 1,164 Accretion of discount (premium) 6,605 241 — — (25) 6,821 Proceeds from paydowns and sales (413,333) (23,608) (331) — (10,019) (447,291) Realized gains (losses) 8,024 — — — (12) 8,012 Net unrealized (depreciation) appreciation (12,407) (59) — — 3,701 (8,765) Fair value, end of period $ 697,232 $ 23,650 $ 167 $ 60,000 $ 22,552 $ 803,601 Change in unrealized appreciation (depreciation) on investments still held as of December 31, 2021 $ (3,751) $ 123 $ — $ — $ 2,939 $ (689) The significant unobservable inputs used in the fair value measurement of the Company’s investments are the discount rate, market quotes and exit multiples. An increase or decrease in the discount rate in isolation would result in significantly lower or higher fair value measurement, respectively. An increase or decrease in the market quote for an investment would in isolation result in significantly higher or lower fair value measurement, respectively. An increase or decrease in the exit multiple would in isolation result in significantly higher or lower fair value measurement, respectively. As the fair value of a debt investment diverges from par, which would generally be the case for non-accrual loans, the fair value measurement of that investment is more susceptible to volatility from changes in exit multiples as a significant unobservable input. The following tables summarize the significant unobservable inputs the Company used to value the majority of its investments categorized within Level 3 as of December 31, 2022 and December 31, 2021. The tables are not intended to be all-inclusive, but instead capture the significant unobservable inputs relevant to the Company’s determination of fair values. These ranges represent the significant unobservable inputs that were used in the valuation of each type of investment, but they do not represent a range of values for any one investment. Fair Value as of Valuation Unobservable Range Investment Type December 31, 2022 Techniques Inputs (Weighted Average) (1) First lien secured loans $ 536,259 Discounted cash flow analysis Discount Rate 10.0% - 30.0% (13.8%) 67,878 Recent transaction Transaction Price 83.1 - 100.0 (95.0) 14,130 Expected repayment Transaction Price 100.0 - 101.0 (100.5) Second lien secured loans 20,634 Discounted cash flow analysis Discount Rate 13.2% - 25.0% (18.9%) Subordinated unsecured loans 167 Discounted cash flow analysis Discount Rate 4.0% - 4.0% (4.0%) Subordinated Notes to STRS JV 80,000 Enterprise Value Analysis n/a n/a Common Equity 9,990 Discounted cash flow analysis Discount Rate 15.6% - 25.9% (22.4%) 4,735 Enterprise Value Analysis EBITDA Multiple 5.0 - 11.8 (8.3) 400 Recent transaction Transaction Price 1.0 - 1.0 (1.0) Preferred Equity 714 Discounted cash flow analysis Discount Rate 20.0% - 22.5% (20.0%) 194 Enterprise Value Analysis EBITDA Multiple 8.0 - 9.5 (8.6) 926 Enterprise Value Analysis Revenue Multiple 0.5 - 0.5 (0.5) 200 Recent transaction Transaction Price 1.0 - 1.0 (1.0) Warrant 3,841 Discounted cash flow analysis Discount Rate 25.9% - 27.2% (27.2%) Total Level 3 Investments $ 740,068 (1) Unobservable inputs were weighted by the relative fair value of the investments. Fair Value as of Valuation Unobservable Range Investment Type December 31, 2021 Techniques Inputs (Weighted Average) (1) First lien secured loans $ 358,921 Discounted cash flows Discount rate 4.5% – 21.8% (9.8%) Exit EBITDA multiple 5.5x – 15.0x (8.3x) 209,892 Recent transaction Transaction price 94.5 – 99.1 (97.9) 113,808 Discounted cash flows and Recent transaction Discount rate 7.2% – 10.3% (8.6%) Transaction price 97.5 – 98.8 (98.4) Exit EBITDA multiple 7.0x – 11.0x (9.5x) 7,542 Guideline public companies LTM EBITDA multiple 5.1x 7,069 Expected repayment - - $ 697,232 Second lien secured loans $ 18,725 Discounted cash flows Discount rate 11.5% – 22.3% (14.2%) Exit EBITDA multiple 6.5x – 8.5x (8.0x) 4,925 Recent transaction Transaction price 98.5 $ 23,650 Subordinated Notes $ 60,000 Enterprise value - - 167 Recent transaction Transaction price 100.0 $ 60,167 Preferred Equity $ 1,018 Similar transactions LTM EBITDA multiple 9.7x Discount for lack of marketability 15.0% 786 Discounted cash flows and Guideline public companies sDiscount Rate 17.3% Exit EBITDA Multiple 11.0x LTM EBITDA Multiple 7.9x NFY EBITDA Multiple 7.5x Discount for lack of marketability 10.0% 1,007 Recent transaction Transaction price $1.00 – $56.30 ($47.13) per share $ 2,811 Common Equity $ 3,602 Discounted cash flows Discount rate 13.0% – 22.7% (15.0%) Exit EBITDA Multiple 8.6x – 10.0x (9.6x) Discount for lack of marketability 10.0% – 15.0% (10.3%) 8,124 Discounted cash flows, Guideline public companies and Expected repayment Discount rate 14.0% – 19.0% (18.2%) Exit EBITDA Multiple 8.0x – 11.0x (10.5x) NFY EBITDA Multiple 8.6x – 10.8x (8.9x) Discount for lack of marketability 10.0% Transaction price $1.00 per share 2,052 Similar transactions LTM EBITDA Multiple 6.0x – 13.4x (10.5x) 1,502 Recent transaction Transaction price $1.00 – $1,000.00 ($289.95) per share $ 15,280 Warrant 4,461 Discounted cash flows and Option-pricing method Discount rate 22.7% – 29.5% (29.2%) Exit EBITDA multiple 5.5x – 8.6x (5.9x) Volatility 3.5% – 8.7% (3.6%) Discount for lack of marketability 15.0% $ 4,461 Total Level 3 Investments $ 803,601 (1) Unobservable inputs were weighted by the relative fair value of the investments. Valuation of investments may be determined by weighting various valuation techniques. Significant judgment is required in selecting the assumptions used to determine the fair values of these investments. The valuation methods selected for a particular investment are based on the circumstances and on the sufficiency of data available to measure fair value. If more than one valuation method is used to measure fair value, the results are evaluated and weighted, as appropriate, considering the reasonableness of the range indicated by those results. A fair value measurement is the point within that range that is most representative of fair value in the circumstances. The availability of observable inputs can vary depending on the financial instrument and is affected by a wide variety of factors, including, for example, the nature of the instrument, whether the instrument is traded on an active exchange or in the secondary market and the current market conditions. To the extent that the valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires a greater degree of judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for financial instruments classified as Level 3. The determination of fair value using the selected methodologies takes into consideration a range of factors including the price at which the investment was acquired, the nature of the investment, local market conditions, trading values on public and private exchanges for comparable securities, current and projected operating performance and financing transactions subsequent to the acquisition of the investment, compliance with agreed upon terms and covenants, and assessment of credit ratings of an underlying borrower. These valuation methodologies involve a significant degree of judgment to be exercised. As it relates to investments which do not have an active public market, there is no single standard for determining the estimated fair value. Valuations of privately held investments are inherently uncertain, and they may fluctuate over short periods of time and may be based on estimates. The determination of fair value may differ materially from the values that would have been used if a ready market for these investments existed. In some cases, fair value for such investments is best expressed as a range of values derived utilizing different methodologies from which a single estimate may then be determined. Consequently, fair value for each investment may be derived using a combination of valuation methodologies that, in the judgment of the investment professionals, are most relevant to such investment. The selected valuation methodologies for a particular investment are consistently applied on each measurement date. However, a change in a valuation methodology or its application from one measurement date to another is possible if the change results in a measurement that is equally or more representative of fair value in the circumstances. The following table presents the principal amount and fair value of the Company’s borrowings as of December 31, 2022 and December 31, 2021. The fair value of the Credit Facility (as defined in Note 6) was estimated by discounting remaining payments using applicable market rates or market quotes for similar instruments at the measurement date, if available. As of December 31, 2022, the Credit Facility approximates its carrying value presented net of unamortized debt issuance costs and original issuance discount, net of accretion. The fair value of the Company’s 6.00% private notes due 2023 (the “6.000% 2023 Notes”), the 5.375% private notes due 2025 (the “5.375% 2025 Notes”), the 5.375% private notes due 2026 (the “5.375% 2026 Notes”), the 4.00% notes due 2026 (the “4.000% 2026 Notes”), the 5.625% private notes due 2027 (the “5.625% 2027 Notes”), and the 4.25% private notes due 2028 (the “4.250% 2028 Notes”) were estimated using discounted future cash flows to the valuation date. As of December 31, 2022 As of December 31, 2021 Fair Principal Amount Principal Amount Value Level Outstanding Fair Value Outstanding Fair Value JPM Credit Facility 3 $ 255,145 $ 252,799 $ 291,637 $ 302,147 6.000% 2023 Notes 3 30,000 30,382 30,000 31,802 5.375% 2025 Notes 3 40,000 37,474 40,000 40,687 5.375% 2026 Notes 3 10,000 9,149 10,000 10,091 4.000% 2026 Notes 3 75,000 67,912 75,000 74,957 5.625% 2027 Notes 3 10,000 9,063 10,000 10,097 4.250% 2028 Notes 3 25,000 21,981 25,000 24,861 $ 445,145 $ 428,760 $ 481,637 $ 494,642 |
BORROWINGS
| BORROWINGS | 12 Months Ended |
| Dec. 31, 2022 | |
| BORROWINGS | |
| BORROWINGS | NOTE 6 – BORROWINGS Historically, the 1940 Act has permitted the Company to issue “senior securities,” including borrowing money from banks or other financial institutions, only in amounts such that its asset coverage, as defined in the 1940 Act, equals at least 200% after such incurrence or issuance. In March 2018, the Small Business Credit Availability Act (the “SBCAA”) was enacted into law. The SBCAA, among other things, amended the 1940 Act to reduce the asset coverage requirements applicable to business development companies from 200% to 150% so long as the business development company meets certain disclosure requirements and obtains certain approvals. At the Company’s annual meeting of stockholders held on August 1, 2018, the Company’s stockholders approved the reduced asset coverage ratio from 200% to 150%, such that the Company’s maximum debt-to-equity ratio increased from a prior maximum of 1.0x (equivalent of $1 of debt outstanding for each $1 of equity) to a maximum of 2.0x (equivalent to $2 of debt outstanding for each $1 of equity). As a result, the Company’s asset coverage requirements applicable to senior securities decreased from 200% to 150%, effective August 2, 2018. As of December 31, 2022 and December 31, 2021, the Company’s asset coverage for borrowed amounts was 174.7% and 172.6%, respectively. Total borrowings outstanding and available as of December 31, 2022, were as follows: Maturity Rate Principal Amount Outstanding Amortized Cost Available JPM Credit Facility (1) 11/22/2025 L+2.35 % $ 255,145 $ 252,799 $ 79,855 6.000% 2023 Notes 8/7/2023 6.00 % 30,000 29,893 — 5.375% 2025 Notes 10/20/2025 5.375 % 40,000 39,629 — 5.375% 2026 Notes 12/4/2026 5.375 % 10,000 9,885 — 4.000% 2026 Notes 12/15/2026 4.00 % 75,000 73,652 — 5.625% 2027 Notes 12/4/2027 5.625 % 10,000 9,876 — 4.250% 2028 Notes 12/6/2028 4.25 % 25,000 24,693 — Total debt $ 445,145 $ 440,427 $ 79,855 (1) The JPM Credit Facility bears interest at LIBOR plus 2.35% on outstanding USD denominated borrowings up to $285,000 and for borrowings above $285,000 , a rate of SOFR plus 2.50% is applied . Total borrowings outstanding and available as of December 31, 2021, were as follows: Maturity Rate Principal Amount Outstanding Amortized Cost Available JPM Credit Facility 11/22/2025 L+2.35 % $ 291,637 $ 288,985 $ 43,363 6.000% 2023 Notes 8/7/2023 6.00 % 30,000 29,717 — 5.375% 2025 Notes 10/20/2025 5.375 % 40,000 39,497 — 5.375% 2026 Notes 12/4/2026 5.375 % 10,000 9,856 — 4.000% 2026 Notes 12/15/2026 4.00 % 75,000 73,404 — 5.625% 2027 Notes 12/4/2027 5.625 % 10,000 9,851 — 4.250% 2028 Notes 12/6/2028 4.25 % 25,000 24,648 — Total debt $ 481,637 $ 475,958 $ 43,363 Credit Facility On December 21, 2020, the terms of the Credit Facility were amended to, among other things, (i) increase the minimum funding amount from $175,000 to $200,000, (ii) increase the size of the facility from $250,000 to $285,000 and retain an accordion feature which allows for the expansion of the borrowing limit up to $350,000 and (iii) provide for the implementation of certain changes relating to the transition away from LIBOR in the market. On April 28, 2021, the terms of the Credit Facility were amended and restated to, among other things, enable WhiteHorse Credit to borrow in British Pounds or Euros. On July 15, 2021, the terms of the Credit Facility were amended to, among other things, allow WhiteHorse Credit to reduce the applicable margins for interest rates to 2.35%, extend the non-call period from November 22, 2021 to November 22, 2022, extend the end of the reinvestment period from November 22, 2023 to November 22, 2024 and extend the scheduled termination date from November 22, 2024 to November 22, 2025. On October 4, 2021, the terms of the Credit Facility were amended to, among other things, established a temporary upsize to the borrowing capacity under the Credit Facility, which allowed WhiteHorse Credit to borrow up to $335,000 for a three-month period beginning on October 4, 2021. On January 4, 2022, the terms of the Credit Facility were amended to, among other things, continue to establish a temporary upsize to the borrowing capacity under the Credit Facility, which allowed WhiteHorse Credit to borrow up to $335,000 for a four-month period that originally began on October 4, 2021. On February 4, 2022, the terms of the Credit Facility were further amended to, among other things (i) increase WhiteHorse Credit’s availability under the Credit Facility from $285,000 to $310,000 (the “$25,000 Increase”), (ii) increase the minimum funding amount from $200,000 to $217,000, (iii) extend an additional temporary increase of $25,000 in availability under the Credit Facility, allowing WhiteHorse Credit to borrow up to $335,000 through April 4, 2022 (the “$25,000 Temporary Increase”), and (iv) apply an annual interest rate equal to applicable SOFR plus 2.50% to any borrowings under the $25,000 Increase in the Credit Facility and the $25,000 Temporary Increase in availability under the Credit Facility. On March 30, 2022, the terms of the Credit Facility were further amended to, among other things: (i) increase WhiteHorse Credit’s availability under the Credit Facility from $310,000 to $335,000; (ii) retain an accordion feature which allows for the expansion of the borrowing limit up to $375,000; and (iii) increase the minimum funding amount from $217,000 to $234,500. The Credit Facility bears interest at LIBOR plus 2.35% on outstanding USD denominated borrowings up to $285,000 and SOFR plus 2.50% on borrowings above $285,000. The Credit Facility bears interest at EURIBOR for EUR denominated borrowings, CDOR for CAD denominated borrowings, SONIA for GBP denominated, plus, in each case, a spread of 2.35% on outstanding borrowings. The Company is required to pay a non-usage fee which accrues at 0.75% per annum on the average daily unused amount of the financing commitments to the extent the aggregate principal amount available under the Credit Facility has not been borrowed. The minimum borrowing requirement is $234,500. In connection with the Credit Facility, WhiteHorse Credit pledged securities with a fair value of approximately $624,123 as of December 31, 2022 as collateral. The Credit Facility has a maturity date of November 22, 2025. Under the Credit Facility, the Company has made certain customary representations and warranties and is required to comply with various covenants, including leverage restrictions, reporting requirements and other customary requirements for similar credit facilities. As of December 31, 2022, the Company had $255,145 in outstanding borrowings and $79,855 undrawn under the Credit Facility. As of December 31, 2022, weighted average outstanding borrowings were $264,411 at a weighted average interest rate of 4.04%. As of December 31, 2022, the interest rate in effect on outstanding borrowings was 7.11%. The Company’s ability to draw down undrawn funds under the Credit Facility is determined by collateral and portfolio quality requirements stipulated in the credit and security agreement. As of December 31, 2022, $79,855 was available to be drawn by the Company based on these requirements. As of December 31, 2021, the Company had $291,637 in outstanding borrowings and $43,363 undrawn under the Credit Facility. As of December 31, 2021, the weighted average outstanding borrowings were $245,934 at a weighted average interest rate of 2.60%. As of December 31, 2021, the interest rate in effect on outstanding borrowings was 2.55%. The Company’s ability to draw down undrawn funds under the Credit Facility is determined by collateral and portfolio quality requirements stipulated in the credit and security agreement. As of December 31, 2021, $43,363 was available to be drawn by the Company based on these requirements. 6.000% 2023 Notes 5.375% 2025 Notes 5.375% 2026 Notes 4.000% 2026 Notes 5.625% 2027 Notes outstanding and future unsecured unsubordinated indebtedness issued by the Company. The Company used the net proceeds from this offering to redeem existing debt. 4.250% 2028 Notes 2025 Public Notes |
RELATED PARTY TRANSACTIONS
| RELATED PARTY TRANSACTIONS | 12 Months Ended |
| Dec. 31, 2022 | |
| RELATED PARTY TRANSACTIONS | |
| RELATED PARTY TRANSACTIONS | NOTE 7 - RELATED PARTY TRANSACTIONS Investment Advisory Agreement ● determines the composition of the investment portfolio, the nature and timing of the changes to the portfolio and the manner of implementing such changes; ● identifies, evaluates and negotiates the structure of the investments the Company makes (including performing due diligence on the Company’s prospective portfolio companies); and ● closes, monitors and administers the investments the Company makes, including the exercise of any voting or consent rights. In addition, WhiteHorse Advisers provides the Company with access to personnel and an Investment Committee. Under the Investment Advisory Agreement, the Company pays WhiteHorse Advisers a fee for investment management services consisting of a base management fee and an incentive fee. The Investment Advisory Agreement may be terminated by either party without penalty upon 60 days’ written notice to the other party. Base Management Fee The base management fee is calculated at an annual rate equal to 2.0% based on the Company’s consolidated gross assets (including cash and cash equivalents and assets purchased with borrowed funds); provided, however, the base management fee will be calculated at an annual rate equal to 1.25% of the Company’s consolidated gross assets (including cash and cash equivalents and assets purchased with borrowed funds), that exceed the product of (i) 200% and (ii) the value of the Company’s total net assets, at the end of the two most recently completed calendar quarters. Base management fees are payable quarterly in arrears and are appropriately pro-rated for any partial month or quarter. The following table details our management fee expenses for the years ended December 31, 2022, 2021 and 2020: Year ended December 31, Management Fee ($ in thousands) 2022 2021 2020 Base management fee $ 15,600 $ 13,975 $ 12,464 Base management fee waived — — — Total management fees $ 15,600 $ 13,975 $ 12,464 As of December 31, 2022 and December 31, 2021, management fees payable on the consolidated statements of assets and liabilities were $3,860 and $3,766 , respectively. Performance-based Incentive Fee The performance-based incentive fee consists of two components that are independent of each other, except as provided by the Incentive Fee Cap and Deferral Mechanism discussed below. The calculations of these two components have been structured to include a fee limitation such that no incentive fee will be paid to the investment adviser for any quarter if, after such payment, the cumulative incentive fees paid to the investment adviser for the period that includes the current fiscal quarter and the 11 full preceding fiscal quarters, referred to as the “Incentive Fee Look-back Period,” would exceed 20.0% of the Cumulative Pre-Incentive Fee Net Return (as defined below) during the Incentive Fee Look-back Period. Each quarterly incentive fee is subject to the Incentive Fee Cap (as defined below) and a deferral mechanism through which the investment adviser may recap a portion of such deferred incentive fees, which is referred to together as the “Incentive Fee Cap and Deferral Mechanism.” This limitation is accomplished by subjecting each incentive fee payable to a cap, which is referred to as the “Incentive Fee Cap.” The Incentive Fee Cap in any quarter is equal to (a) 20.0% of Cumulative Pre-Incentive Fee Net Return during the Incentive Fee Look-back Period less (b) cumulative incentive fees of any kind paid to the investment adviser during the Incentive Fee Look-back Period. To the extent the Incentive Fee Cap is zero or a negative value in any quarter, the Company will pay no incentive fee to its investment adviser in that quarter. The Company will only pay incentive fees to the extent allowed by the Incentive Fee Cap and Deferral Mechanism. To the extent that the payment of incentive fees is limited by the Incentive Fee Cap and Deferral Mechanism, the payment of such fees may be deferred and paid in subsequent quarters up to three years after their date of deferment, subject to applicable limitations included in the Investment Advisory Agreement. The deferral component of the Incentive Fee Cap and Deferral Mechanism may cause incentive fees that accrued during one fiscal quarter to be paid to the investment adviser at any time during the 11 full fiscal quarters following such initial full fiscal quarter. The “Cumulative Pre-Incentive Fee Net Return” refers to the sum of (a) Pre-Incentive Fee Net Investment Income (as defined below) for each period during the Incentive Fee Look-back Period and (b) the sum of cumulative realized capital gains, cumulative realized capital losses, cumulative unrealized capital depreciation and cumulative unrealized capital appreciation during the applicable Incentive Fee Look-back Period. The first component, which is income-based (the “Income Incentive Fee”), is calculated and payable quarterly in arrears and is determined based on Pre-Incentive Fee Net Investment Income for the immediately preceding calendar quarter, subject to the Incentive Fee Cap and Deferral Mechanism. For this purpose, “Pre-Incentive Fee Net Investment Income” means, in each case on a consolidated basis, interest income, distribution income and any other income (including any other fees (other than fees for providing managerial assistance), such as commitment, origination, structuring, diligence and consulting fees or other fees received from portfolio companies) accrued during the calendar quarter, minus the Company’s operating expenses for the quarter (including the base management fee, expenses payable under the administration agreement (the “Administration Agreement”), any interest expense and any dividends paid on any issued and outstanding preferred stock, but excluding the incentive fee). Pre-Incentive Fee Net Investment Income does not include any realized capital gains, realized capital losses or unrealized capital appreciation or depreciation. The operation of the first component of the incentive fee for each quarter is as follows: ● no incentive fee is payable to the Company’s investment adviser in any calendar quarter in which Pre-Incentive Fee Net Investment Income does not exceed the “Hurdle Rate” of 1.75% (7.00% annualized); ● 100% of Pre-Incentive Fee Net Investment Income with respect to that portion of such Pre-Incentive Fee Net Investment Income, if any, that exceeds the Hurdle Rate but is less than 2.1875% in any calendar quarter (8.75% annualized) is payable to the Company’s investment adviser. This portion of the Company’s Pre-Incentive Fee Net Investment Income (which exceeds the Hurdle Rate but is less than 2.1875%) is referred to as the “catch-up.” The effect of the catch-up is that, if such Pre-Incentive Fee Net Investment Income exceeds 2.1875% in any calendar quarter, the investment adviser will receive 20% of such Pre-Incentive Fee Net Investment Income as if the Hurdle Rate did not apply; and ● 20% of the amount of such Pre-Incentive Fee Net Investment Income, if any, that exceeds 2.1875% in any calendar quarter (8.75% annualized) is payable to the Company’s investment adviser (once the Hurdle Rate is reached and the catch-up is achieved, 20% of all Pre-Incentive Fee Net Investment Income). The portion of such incentive fee that is attributable to deferred interest (such as PIK interest or original issue discount) will be paid to the investment adviser, together with interest from the date of deferral to the date of payment, only if and to the extent that the Company actually receives such interest in cash, and any accrual will be reversed if and to the extent such interest is reversed in connection with any write-off or similar treatment of the investment giving rise to any deferred interest accrual. Any reversal of such amounts would reduce net income for the quarter by the net amount of the reversal (after taking into account the reversal of incentive fees payable) and would result in a reduction and possibly elimination of the incentive fees for such quarter. There is no accumulation of amounts on the Hurdle Rate from quarter to quarter and, accordingly, there is no clawback of amounts previously paid if subsequent quarters are below the quarterly Hurdle Rate and there is no delay of payment if prior quarters are below the quarterly Hurdle Rate. Since the Hurdle Rate is fixed, as interest rates rise, it will be easier for the investment adviser to surpass the Hurdle Rate and receive an incentive fee based on Pre-Incentive Fee Net Investment Income. Net investment income used to calculate this component of the incentive fee is also included in the amount of consolidated gross assets used to calculate the base management fee. These calculations will be appropriately prorated for any period of less than three months and adjusted for any share issuances or repurchases during the current quarter. The second component, the capital gains component of the incentive fee (the “Capital Gains Incentive Fee”), which is determined and payable in arrears as of the end of each calendar year (or upon termination of the Investment Advisory Agreement, as of the termination date), commenced on January 1, 2013, and equals 20% of cumulative aggregate realized capital gains from January 1 through the end of each calendar year, computed net of aggregate cumulative realized capital losses and aggregate cumulative unrealized capital depreciation through the end of each year (the “Capital Gains Incentive Fee Base”), less the aggregate amount of any previously paid capital gains incentive fees and subject to the Incentive Fee Cap and Deferral Mechanism. If such amount is negative, then no capital gains incentive fee will be payable for the year. Additionally, if the Investment Advisory Agreement is terminated as of a date that is not a calendar year end, the termination date will be treated as though it were a calendar year end for purposes of calculating and paying the capital gains incentive fee. The capital gains component of the incentive fee is not subject to any minimum return to stockholders. In accordance with GAAP, the Company is also required to include the aggregate unrealized capital appreciation on investments in the calculation and accrue a capital gains incentive fee on a quarterly basis if such unrealized capital appreciation were realized, even though such unrealized capital appreciation is not permitted to be considered in calculating the fee actually payable under the Investment Advisory Agreement. If the Capital Gains Incentive Fee Base, adjusted as required by GAAP to include unrealized capital appreciation, is positive at the end of a reporting period, then GAAP requires the Company to accrue a Capital Gains Incentive Fee equal to 20% of such amount, less the aggregate amount of any Capital Gains Incentive Fees previously paid and Capital Gains Incentive Fees accrued under GAAP in all prior periods. If such amount is negative, then there is no accrual for such period. The resulting accrual under GAAP in a given period may result in either additional expense (if such cumulative amount is greater than in the prior period) or a reversal of previously recorded expense (if such cumulative amount is less than in the prior period). There can be no assurance that such unrealized capital appreciation will be realized in the future. Because of the structure of the incentive fee, it is possible that the Company may pay an incentive fee in a quarter where it incurs a loss subject to the Incentive Fee Cap and Deferral Mechanism. For example, if the Company receives Pre-Incentive Fee Net Investment Income in excess of the Hurdle Rate, it will pay the applicable Income Incentive Fee even after incurring a loss in that quarter due to realized and unrealized capital losses. The following table provides a breakdown of the performance-based incentive fees for the years ended December 31, 2022, 2021 and 2020: Year ended December 31, Performance-based Incentive Fee ($ in thousands) 2022 2021 2020 Income incentive fee $ 8,862 $ 7,263 $ 6,114 Capital gains incentive fee (1,803) 261 1,505 Performance-based incentive fees waived — — — Total performance-based incentive fees $ 7,059 $ 7,524 $ 7,619 As of December 31, 2022 and December 31, 2021, incentive fees payable on the consolidated statements of assets and liabilities were $5,618 and $7,958, respectively. Administration Agreement Substantially all the Company’s payments of operating expenses to third parties were made by a related party, for which such third party received reimbursement from the Company. During each of the years ended December 31, 2022, 2021 and 2020, the Company incurred allocated administrative service fees of $683. Co-investments with Related Parties As of December 31, 2022 and December 31, 2021, certain funds affiliated with WhiteHorse Advisers and its related entities maintained co-investments in the Company’s investments of $4,415,678 and $4,502,807, respectively. STRS JV |
COMMITMENTS AND CONTINGENCIES
| COMMITMENTS AND CONTINGENCIES | 12 Months Ended |
| Dec. 31, 2022 | |
| COMMITMENTS AND CONTINGENCIES | |
| COMMITMENTS AND CONTINGENCIES | NOTE 8 - COMMITMENTS AND CONTINGENCIES Commitments As of December 31, 2022 and December 31, 2021, the balance of unfunded commitments to extend credit was $56,190 and $53,113, respectively. Commitments to extend credit consist principally of the unused portions of commitments that obligate the Company to extend credit, such as revolving credit arrangements or similar transactions. These commitments are often subject to financial or non-financial milestones and other conditions to borrow that must be achieved before the commitment can be drawn. In addition, the commitments generally have fixed expiration dates or other termination clauses. Since commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The following table summarizes the Company’s unfunded commitments as of December 31, 2022 and December 31, 2021: Unfunded Commitments (1) ($ in thousands) As of December 31, 2022 As of December 31, 2021 Revolving Loan Commitments: ABB/Con-cise Optical Group LLC (d/b/a ABB Optical Group, LLC) $ 113 $ — Bridgepoint Healthcare, LLC 1,588 1,588 Camp Facility Services Holdings, LLC (d/b/a Camp Construction Services, Inc.) — 2,031 Claridge Products and Equipment, LLC 204 491 Coastal Television Broadcasting Group LLC 309 309 EducationDynamics, LLC 1,199 1,199 Epiphany Business Services, LLC (d/b/a Epiphany Dermatology, PA) — 438 Gulf Winds International Acquisition, LLC (d/b/a Gulf Winds International, Inc.) 647 — HC Salon Holdings, Inc. (d/b/a Hair Cuttery) 700 700 HRG Management, LLC (d/b/a HomeRiver Group, LLC) — 1,083 Industrial Specialty Services USA LLC 508 1,182 Inspired Beauty Brands, Inc. 265 531 I&I Sales Group, LLC (d/b/a Avision Sales Group) — 619 ITS Buyer Inc. (d/b/a ITS Logistics, LLC) — 592 IvyRehab Intermediate II, LLC (d/b/a Ivy Rehab) — 403 Juniper Landscaping Holdings LLC — 597 Leviathan Intermediate Holdco, LLC (d/b/a Unleashed Brands Group) 494 — LHS Borrower, LLC (d/b/a Leaf Home, LLC) — 560 LMG Holdings, Inc. — 414 Motivational Marketing, LLC (d/b/a Motivational Fulfillment) 1,024 1,182 MSI Information Services, Inc. 1,050 — Naviga Inc. (f/k/a Newscycle Solutions, Inc.) — 132 PFB Holdco, Inc. (d/b/a PFB Corporation) (1) 899 963 PFB Holdco, Inc. (d/b/a PFB Corporation) 296 296 PG Dental New Jersey Parent, LLC 352 232 Power Service Group CR Acquisition Inc. (d/b/a Power Plant Services) 2,299 3,030 RLJ Pro-Vac, Inc. (d/b/a Pro-Vac) — 1,013 Salon Republic Holdings, LLC (d/b/a Salon Republic, LLC) 603 — Sleep OpCo LLC (d/b/a Brooklyn Bedding LLC) 2,646 2,646 Telestream Holdings Corporation 397 795 The Kyjen Company, LLC (d/b/a Outward Hound) — 554 Trimlite Buyer LLC (d/b/a Trimlite LLC) — 1,473 Total unfunded revolving loan commitments 15,593 25,053 Delayed Draw Loan Commitments: BBQ Buyer, LLC (d/b/a BBQ Guys) — 854 Bridgepoint Healthcare, LLC 794 794 Camp Facility Services Holdings, LLC (d/b/a Camp Construction Services, Inc.) 4,063 4,063 DCA Investment Holding, LLC (d/b/a Dental Care Alliance, LLC) — 1,062 EducationDynamics, LLC 1,709 1,709 Empire Office, Inc. — 4,926 Grupo HIMA San Pablo, Inc. — 667 HRG Management, LLC (d/b/a HomeRiver Group, LLC) 2,167 1,514 I&I Sales Group, LLC (d/b/a Avision Sales Group) — 2,699 IvyRehab Intermediate II, LLC (d/b/a Ivy Rehab) — 1,188 Juniper Landscaping Holdings LLC — 2,387 JZ Capital Partners Ltd. 5,714 — PlayMonster LLC — 2,867 Power Service Group CR Acquisition Inc. (d/b/a Power Plant Services) 2,090 — Salon Republic Holdings, LLC (d/b/a Salon Republic, LLC) 2,097 — Solar Holdings Bidco Limited (1)(2) 4,008 — Source Code Holdings, LLC (d/b/a Source Code Corporation) — 2,185 StoicLane MidCo, LLC (d/b/a StoicLane Inc.) 8,217 — Telestream Holdings Corporation 346 — True Blue Car Wash, LLC 59 1,145 US Methanol Midco LLC (d/b/a US Methanol LLC) 9,333 — Total unfunded delayed draw loan commitments 40,597 28,060 Total Unfunded Commitments $ 56,190 $ 53,113 (1) Unfunded commitments denominated in non-USD currencies have been converted to USD using the exchange rate as of the applicable reporting date. (2) Principal amount is non-USD denominated and is based in British pounds. At the option of the borrower, amounts borrowed under the delayed draw term loan commitment can be US dollars, Canadian dollars or British pounds. As of December 31, 2022, the Company had commitments to fund equity interests and subordinated notes in STRS JV of $20,000 and $80,000, respectively, both of which were fully funded. As of December 31, 2021, the Company had commitments to fund equity interests and subordinated notes in STRS JV of $15,000 and $60,000, respectively, both of which were fully funded. The capital commitments cannot be drawn without an affirmative vote by both the Company’s and STRS Ohio’s representatives on STRS JV’s board of managers. Indemnification Legal Proceedings |
STOCKHOLDERS' EQUITY
| STOCKHOLDERS' EQUITY | 12 Months Ended |
| Dec. 31, 2022 | |
| STOCKHOLDERS' EQUITY | |
| STOCKHOLDERS' EQUITY | NOTE 9 - STOCKHOLDERS’ EQUITY On March 15, 2021, the Company launched an "at-the-market" offering (the "ATM Program") by entering into an Equity Distribution Agreement with Raymond James & Associates, Inc. pursuant to which the Company may offer and sell, from time to time, through Raymond James & Associates, Inc., as the sales agent, shares of its common stock having an aggregate offering amount of up to $35,000. Since the commencement of the ATM Program, the Company sold 276,300 shares of its common stock under the ATM Program at a weighted-average price of $15.77 per share, which amounted to $4,359 in gross proceeds. The Company received net proceeds of $4,272 after deducting commissions to the sales agent, but before offering expenses. As of December 31, 2022, the Company had $30,641 available under the ATM Program. As of December 31, 2021, the Company had $30,893 available under the ATM Program. On October 25, 2021, the Company completed an offering of 1,900,000 shares of our common stock at a public offering price of $15.81 per share, inclusive of underwriting discounts and commissions. The issuance of 1,900,000 shares resulted in net proceeds to the Company of $29,374, inclusive of underwriting discounts and commissions and before offering expenses. In connection with the offering, the Company granted the underwriters an overallotment option to purchase up to an additional 285,000 shares of the Company’s common stock. On November 3, 2021, the Company raised an additional $4,326 from the issuance of an additional 282,300 shares pursuant to the underwriters’ exercise of the overallotment option to purchase additional shares. WhiteHorse Advisers agreed to bear a portion of the underwriting discounts and commissions in connection with the offering, such that the issuance of the 2,182,300 shares (which includes the additional shares issued pursuant to the overallotment option) resulted in net proceeds to the Company of $33,700 before offering expenses, which was at or above the Company’s net ass value per share at the time of the offering and the overallotment option. The following table summarizes the total shares issued and proceeds received, net of offering costs, relating to the issuance of shares of the Company’s common stock from the DRIP and pursuant to the ATM Program for the years ended December 31, 2022 and 2021. Year ended December 31, ($ in thousands except share and per share amounts) 2022 2021 Shares Issued from Equity Offering — 2,182,300 Shares Issued from ATM Program 16,678 259,682 Shares Issued from DRIP 63,743 174,653 Total Shares Issued 80,421 2,616,635 Proceeds, before offering expenses $ 1,225 $ 41,285 Average Price Per Share (1) $ 15.23 $ 15.78 (1) The average price per share for the year ended December 31, 2022 inclusive of offering expenses, was $13.72 . The average price per share for the year ended December 31, 2021 inclusive of offering expenses, was $15.35 . |
FINANCIAL HIGHLIGHTS
| FINANCIAL HIGHLIGHTS | 12 Months Ended |
| Dec. 31, 2022 | |
| FINANCIAL HIGHLIGHTS | |
| FINANCIAL HIGHLIGHTS | NOTE 10 - FINANCIAL HIGHLIGHTS The following is a schedule of financial highlights: Years Ended December 31, 2022 2021 2020 2019 2018 Per share data: (1) Net asset value, beginning of period $ 15.10 $ 15.23 $ 15.23 $ 15.35 $ 13.98 Investment operations: Net investment income 1.60 1.36 1.18 1.52 1.22 Net realized and unrealized gains(losses) on investments and foreign currency transactions (0.93) 0.07 0.37 (0.02) 1.57 Net increase in net assets resulting from operations 0.67 1.43 1.55 1.50 2.79 Distributions declared from net investment income (1.47) (1.56) (1.55) (1.62) (1.42) Net asset value, end of period $ 14.30 $ 15.10 $ 15.23 $ 15.23 $ 15.35 Total annualized return based on market value (2) (15.81) % 13.89 % (0.66) % 9.72 % (5.22) % Total annualized return based on net asset value 4.55 % 9.21 % 10.36 % 7.70 % 18.66 % Net assets, end of period $ 332,387 $ 349,751 $ 312,897 $ 312,955 $ 315,296 Per share market value at end of period $ 13.05 $ 15.50 $ 13.61 $ 13.70 $ 12.72 Shares outstanding end of period 23,243,088 23,162,667 20,546,032 20,546,032 20,546,032 Ratios/Supplemental Data: (3) Ratio of expenses before incentive fees to average net assets (4) 12.54 % 10.96 % 9.78 % 8.88 % 8.50 % Ratio of incentive fees to average net assets 2.04 % 2.30 % 2.49 % 2.43 % 3.95 % Ratio of total expenses to average net assets (4) 14.58 % 13.26 % 12.27 % 11.31 % 12.45 % Ratio of net investment income to average net assets (4) 10.81 % 8.81 % 7.90 % 9.83 % 8.14 % Portfolio turnover ratio 35.81 % 60.79 % 35.86 % 48.15 % 57.74 % (1) Based on actual number of shares outstanding at the end of the period or the weighted average shares outstanding for the period, unless otherwise noted, as appropriate. (2) Total return is based on the change in market price per share during the period and takes into account distributions, if any, reinvested in accordance with the DRIP. (3) With the exception of the portfolio turnover rate, ratios are reported on an annualized basis. (4) Calculated using total expenses, including income tax provision. Financial highlights are calculated for each securities class taken as a whole. An individual stockholder’s return and ratios may vary based on the timing of capital transactions. |
CHANGE IN NET ASSETS RESULTING
| CHANGE IN NET ASSETS RESULTING FROM OPERATIONS PER COMMON SHARE | 12 Months Ended |
| Dec. 31, 2022 | |
| CHANGE IN NET ASSETS RESULTING FROM OPERATIONS PER COMMON SHARE | |
| CHANGE IN NET ASSETS RESULTING FROM OPERATIONS PER COMMON SHARE | NOTE 11 - CHANGE IN NET ASSETS RESULTING FROM OPERATIONS PER COMMON SHARE The following information sets forth the computation of the basic and diluted per share net increase in net assets resulting from operations: Year Ended December 31, ($ in thousands except share and per share amounts) 2022 2021 2020 Net increase in net assets resulting from operations $ 15,683 $ 30,094 $ 31,685 Weighted average shares outstanding 23,229,552 21,150,168 20,546,032 Basic and diluted per share net increase in net assets resulting from operations $ 0.68 $ 1.42 $ 1.55 |
INCOME TAXES
| INCOME TAXES | 12 Months Ended |
| Dec. 31, 2022 | |
| INCOME TAXES | |
| INCOME TAXES | NOTE 12 – INCOME TAXES The Company has elected to be treated as a RIC under Subchapter M of the Code, and as a result must distribute substantially all of its taxable income. Accordingly, no provision for federal income tax has been made in the consolidated financial statements. The Company distributed 100% of its taxable income in each of its fiscal and taxable years. Distributions from net investment income and distributions from net realized capital gains are determined in accordance with U.S. federal tax regulations, which may differ from amounts determined in accordance with GAAP and those differences could be material. These book-to-tax differences are either temporary or permanent in nature. Reclassifications due to permanent book-tax differences have no impact on net assets. Such reclassifications have been reflected in the consolidated statements of changes in net assets. The reconciliation of net increase in net assets resulting from operations to taxable income is as follows: Years ended December 31, ($ in thousands) 2022 2021 2020 Net increase (decrease) in net assets resulting from operations $ 15,683 $ 30,094 $ 31,685 Change in net unrealized (appreciation) depreciation on investments and foreign currency 7,307 7,512 (3,365) Other book-to-tax differences 9,498 451 3,140 Taxable income before deductions for distributions $ 32,488 $ 38,057 $ 31,460 The tax character of distributions was as follows: Years ended December 31, ($ in thousands) 2022 2021 2020 Ordinary income $ 34,150 100.0 % $ 31,953 95.7 % $ 26,420 83.2 % Return of capital — — — — — — Long-term capital gains — — 1,452 4.3 % 5,323 16.8 % Total distributions $ 34,150 100.0 % 33,405 100.0 % $ 31,743 100.0 % The Company may make certain adjustments to the classification of stockholders’ equity as a result of permanent book-to-tax differences. During the current fiscal year, permanent differences primarily due to nondeductible federal taxes resulted in a net increase in accumulated undistributed net investment income and a net decrease in paid-in capital. As of December 31, 2022, 2021 and 2020, the tax basis components of distributable earnings were as follows: December 31, ($ in thousands) 2022 2021 2020 Ordinary income $ 24,217 $ 29,500 $ 24,100 Accumulated capital and other losses — — — Net unrealized (depreciation) appreciation on investments and foreign currency (22,287) (15,910) (11,226) Distributions deferred — — — Total (accumulated deficit) distributable earnings – tax basis $ 1,930 $ 13,590 $ 12,874 There were no late year ordinary losses for the fiscal years ended December 31, 2022, December 31, 2021 and December 31, 2020. For tax purposes, net capital losses may be carried over to offset future capital gains, if any. The Company is permitted to carry forward capital losses incurred for an unlimited period, and such losses will retain their character as either short-term or long-term capital losses. As of December 31, 2022 and 2021, the Company had $9,333 and zero, respectively of long-term capital loss carryforwards. As of December 31, 2022 and 2021, the Company did not have any short-term capital loss carryforwards As of December 31, 2022, the cost of investments for U.S. federal income tax purposes was $784,812, resulting in net unrealized depreciation of $24,584. This is comprised of gross unrealized appreciation of $7,881 and gross unrealized depreciation of $32,465 on a tax basis. As of December 31, 2021, the cost of investments for U.S. federal income tax purposes was $835,502, resulting in net unrealized depreciation of $16,293. This is comprised of gross unrealized appreciation of $10,769 and gross unrealized depreciation of $27,062 on a tax basis. The Company did not have any uncertain tax positions that met the recognition or measurement criteria of ASC 740-10-25, Income Taxes |
SUBSEQUENT EVENTS
| SUBSEQUENT EVENTS | 12 Months Ended |
| Dec. 31, 2022 | |
| SUBSEQUENT EVENTS | |
| SUBSEQUENT EVENTS | NOTE 13 - SUBSEQUENT EVENTS Management has evaluated events that have occurred after the balance sheet date but before the consolidated financial statements are issued and other than the items discussed below, the Company has determined that there were no additional subsequent events requiring adjustment or disclosure in the consolidated financial statements. In February 2023, the Company increased our its commitment to the STRS JV in the amount of an additional $15 million, which brings the Company’s total capital commitment to the STRS JV to $115 million, comprised of $92 million of subordinated notes and $23 million of LLC equity interests, and STRS Ohio increased its capital commitment to the STRS JV in the amount of an additional $10 million, which brings its total capital commitment to the STRS JV to $60 million, comprised of $48 million of subordinated notes and $12 million of LLC equity interests. In connection with these increases in capital commitments, the Company’s and STRS Ohio’s amended economic ownership in the STRS JV is approximately 65.71% and 34.29%, respectively. Subsequent to December 31, 2022, the Company received financial information related to its investment in Playmonster Group LLC. Based on this information, the Company expects to place the first lien secured term loan investment on non-accrual status during the first quarter. This conclusion remains subject to change if additional information becomes available. |
SUMMARY OF SIGNIFICANT ACCOUN_2
| SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) | 12 Months Ended |
| Dec. 31, 2022 | |
| SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES | |
| Basis of Presentation | Basis of Presentation Financial Services - Investment Companies Additionally, the accompanying consolidated financial statements and related financial information have been prepared pursuant to the requirements for reporting on Form 10-K and Articles 6, 10 and 12 of Regulation S-X. In the opinion of management, the consolidated financial statements reflect all adjustments, consisting solely of normal recurring accruals considered necessary for the fair presentation of financial results as of and for the periods presented. |
| Principles of Consolidation | Principles of Consolidation |
| Use of Estimates | Use of Estimates |
| Fair Value of Financial Instruments: | Fair Value of Financial Instruments The Company values its investments in accordance with the 1940 Act and Rule 2a-5 thereunder, which sets forth the requirements for determining fair value in good faith. Pursuant to Rule 2a-5, the board of directors has designated the Investment Adviser to determine the fair value of the Company’s investments. The board of directors oversees the Investment Adviser’s performance of its valuation responsibilities, and in support of this oversight, the Investment Adviser provides periodic reports to the Company’s board of directors related to the fair valuation process. The Investment Adviser carries out its responsibilities as valuation designee primarily through its valuation committee (the “Valuation Committee”), assisted by third-party valuation firms, administrative personnel, and other service providers, as appropriate. The Valuation Committee consists of a number of representatives from different functions of the Investment Adviser. The Investment Adviser conducts the fair valuation process on a quarterly basis, subject to the oversight of the Company’s board of directors through the audit committee, using consistently applied valuation procedures. In accordance with the Company’s valuation procedures, the Investment Adviser performs periodic testing of the appropriateness and accuracy of fair value methodologies, and has established a process for approving, monitoring, and evaluating independent pricing service providers. Effective September 8, 2022, the board of directors designated the Investment Adviser as the Company’s valuation designee. Investments that are not publicly traded or for which market prices are not readily available will be valued based on the input of the Investment Adviser and independent third-party valuation firms engaged to review Company investments. These external reviews are used by the Company’s Investment Adviser, subject to the oversight of the board of directors, to review the Company’s internal valuation of investments during the year. |
| Investment Transactions | Investment Transactions |
| Foreign currency translation | Foreign currency translation (1) cash and cash equivalents, restricted cash and cash equivalents, fair value of investments, interest receivable, and other assets and liabilities — at the spot exchange rate on the last business day of the period; and (2) purchases and sales of investments, income and expenses — at the exchange rates prevailing on the respective dates of such transactions. Although net assets and fair values are presented based on the applicable foreign exchange rates described above, the Company does not isolate that portion of the results of operations resulting from changes in foreign exchange rates on investments from the fluctuations arising from changes in fair values of investments held. Such fluctuations are included with the net realized and unrealized gain or loss from investments. Fluctuations arising from the translation of assets other than investments and liabilities are included with the net change in unrealized appreciation (depreciation) on translation of assets and liabilities in foreign currencies on the consolidated statements of operations. Foreign security and currency transactions may involve certain considerations and risks not typically associated with investing in U.S. companies. These risks include, but are not limited to, currency fluctuations and revaluations and future adverse political, social and economic developments, which could cause investments in foreign markets to be less liquid and prices to be more volatile than those of comparable U.S. companies or U.S. government securities. |
| Revenue Recognition | Revenue Recognition Sales Investment Income Dividend income is recorded on the record date for private portfolio companies or on the ex-dividend date for publicly traded portfolio companies. Closing fees associated with investments in portfolio companies are deferred and recognized as interest income over the respective terms of the applicable loans. Upon the prepayment of a loan or debt security, any unamortized loan closing fees are recorded as part of interest income. Commitment fees are based upon the undrawn portion committed by the Company and are recorded as interest income on an accrual basis. Prepayment, amendment and other fees are recognized when earned, generally when such fees are receivable, and are included in fee income on the consolidated statements of operations. The Company may invest in loans that contain a PIK interest rate provision. PIK interest is accrued at the contractual rates and added to loan principal on the reset dates to the extent such amounts are expected to be collected. Non-accrual loans |
| Cash and Cash Equivalents | Cash and Cash Equivalents |
| Restricted Cash and Cash Equivalents | Restricted Cash and Cash Equivalents |
| Offering Costs | Offering Costs |
| Deferred Financing Costs | Deferred Financing Costs |
| Income Taxes | Income Taxes The Company recognizes the financial statement benefit of a tax position only after determining that the relevant tax authority would more-likely-than-not sustain the position following an audit. For tax positions meeting the more-likely-than-not threshold, the amount recognized in the financial statement is the largest benefit or expense that has a greater than 50% likelihood of being realized upon ultimate settlement with the relevant tax authority. Any tax positions not deemed to satisfy the more-likely-than-not threshold are reversed and recorded as tax benefit or tax expense, as appropriate, in the current year. Management has analyzed the Company’s tax positions, and the Company has concluded that the Company did not have any unrecognized tax benefits or unrecognized tax liabilities related to uncertain tax positions as of December 31, 2022 and December 31, 2021. Penalties or interest that may be assessed related to any income taxes would be classified as general and administrative expenses on the consolidated statements of operations. The Company had no amounts accrued for interest or penalties as of December 31, 2022 or December 31, 2021. The Company does not expect the total amount of unrecognized tax benefits to significantly change in the next twelve months. The Company’s tax returns are subject to examination by federal, state and local taxing authorities. Because many types of transactions are susceptible to varying interpretations under U.S. federal and state income tax laws and regulations, the amounts reported in the accompanying consolidated financial statements may be subject to change at a later date by the respective taxing authorities. Tax returns for each of the federal tax years since 2019 remain subject to examination by the Internal Revenue Service. |
| Dividends and Distributions | Dividends and Distributions The Company maintains an “opt out” dividend reinvestment plan (“DRIP”) for common stockholders. As a result, if the Company declares a distribution or other dividend, stockholders’ cash distributions will be automatically reinvested in additional shares of common stock, unless they specifically “opt out” of the DRIP so as to receive cash distributions. |
| Earnings per Share | Earnings per Share |
| Risks and Uncertainties | Risks and Uncertainties |
| Reclassifications | Reclassifications |
| Recent Accounting Pronouncements | Recent Accounting Pronouncements Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848) Facilitation of the Effects of Reference Rate Reform on Financial Reporting Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848 |
FORWARD CURRENCY CONTRACTS (Tab
| FORWARD CURRENCY CONTRACTS (Tables) | 12 Months Ended |
| Dec. 31, 2022 | |
| FORWARD CURRENCY CONTRACTS | |
| Schedule of forward currency contracts | Year ended December 31, 2022 2021 Realized gain (loss) on forward currency contracts $ — $ (3) Unrealized appreciation (depreciation) on forward currency contracts (3) — Total net realized and unrealized gains (losses) on forward currency contracts $ (3) $ (3) |
| Schedule of unrealized appreciation or depreciation on forward currency contracts | Counterparty Currency to be sold Currency to be purchased Settlement date Unrealized appreciation Unrealized depreciation Morgan Stanley C$ 327 CAD $ 241 USD 1/27/23 $ — $ — Morgan Stanley £ 59 GBP $ 69 USD 1/27/23 — (3) Total $ — $ (3) |
| Schedule of notional exposure to foreign currency forward contracts | Year ended December 31, Average USD notional outstanding 2022 2021 Forward currency contracts $ 208 $ 5,047 |
| Schedule of master netting agreement | As of December 31, 2022 Counterparty ($ in thousands) Derivative Assets Subject to Master Netting Agreement Derivative Liabilities Subject to Master Netting Agreement Derivatives Available for Offset Non-cash Collateral Received Non-cash Collateral Pledged (1) Cash Collateral Received (1) Cash Collateral Pledged (1) Net Amount of Derivative Assets (2) Net Amount of Derivative Liabilities (3) Morgan Stanley (CAD) $ — $ — $ — $ — $ — $ — $ — $ — $ — Morgan Stanley (GBP) — 3 — — — — — — 3 Total $ — $ 3 $ — $ — $ — $ — $ — $ — $ 3 (1) In some instances, the actual amount of the collateral received and/or pledged may be more than the amount shown due to overcollateralization. (2) Net amount of derivative assets represents the net amount due from the counterparty to the Company in the event of default. (3) Net amount of derivative liabilities represents the net amount due from the Company to the counterparty in the event of default. |
INVESTMENTS (Tables)
| INVESTMENTS (Tables) | 12 Months Ended |
| Dec. 31, 2022 | |
| Schedule of Investments [Line Items] | |
| Schedule of individual investments | Investments consisted of the following: As of December 31, 2022 As of December 31, 2021 Amortized Cost Fair Value Amortized Cost Fair Value First lien secured loans $ 631,091 $ 618,267 $ 709,318 $ 697,232 Second lien secured loans 24,685 20,634 25,484 23,650 Subordinated unsecured loans 167 167 167 167 Subordinated Note to STRS JV 80,000 80,000 60,000 60,000 Equity (excluding STRS JV) 26,486 21,000 21,991 22,552 Equity in STRS JV 20,000 20,160 15,000 15,607 Total $ 782,429 $ 760,228 $ 831,960 $ 819,208 The following table shows the portfolio composition by industry grouping at fair value: Industry ($ in thousands) As of December 31, 2022 As of December 31, 2021 Advertising $ 154 — % $ 9,738 1.3 % Air Freight & Logistics 16,107 2.4 21,379 2.9 Alternative Carriers 12,068 1.8 — — Application Software 27,117 4.1 22,590 3.0 Asset Management & Custody Banks 10,144 1.5 — — Automotive Retail 14,363 2.2 15,286 2.1 Broadcasting 7,780 1.2 8,027 1.1 Building Products 24,362 3.7 44,184 5.9 Cable & Satellite 20,489 3.1 14,526 2.0 Commodity Chemicals 20,410 3.1 15,172 2.0 Construction & Engineering — — 11,086 1.5 Construction Materials 7,459 1.1 7,673 1.0 Consumer Finance — — 9,628 1.3 Data Processing & Outsourced Services 22,817 3.5 32,864 4.4 Department Stores — — 13,538 1.8 Distributors 4,171 0.6 4,025 0.5 Diversified Chemicals 13,268 2.0 18,360 2.5 Diversified Support Services 11,035 1.7 11,618 1.6 Education Services 12,869 1.9 13,398 1.8 Electric Utilities 10,411 1.7 10,296 1.4 Electronic Equipment & Instruments — — 6,687 0.9 Environmental & Facilities Services 18,459 2.8 32,998 4.4 Health Care Facilities 10,131 1.5 25,576 3.4 Health Care Services 23,333 3.5 58,055 7.8 Health Care Supplies 23,090 3.5 — — Heavy Electrical Equipment 14,520 2.2 11,088 1.5 Home Furnishings 24,780 3.8 24,017 3.2 Household Appliances 6,615 1.0 — — Household Products 11,153 1.7 11,773 1.6 Industrial Machinery 9,874 1.5 — — Interactive Media & Services 9,488 1.4 20,157 2.7 Internet & Direct Marketing Retail 37,191 5.6 45,668 6.1 Investment Banking & Brokerage 18,240 2.8 19,603 2.6 IT Consulting & Other Services 15,408 2.3 19,162 2.6 Leisure Facilities 21,979 3.3 22,142 3.0 Leisure Products 13,366 2.0 3,072 0.4 Life Sciences Tools & Services 4,824 0.8 4,925 0.7 Office Services & Supplies 25,832 3.9 20,921 2.8 Other Diversified Financial Services 3,788 0.7 3,492 0.5 Packaged Foods & Meats 10,941 1.7 10,862 1.5 Paper Packaging 283 0.1 — — Personal Products 13,482 2.0 12,260 1.6 Real Estate Development 8,103 1.2 — — Real Estate Operating Companies 5,909 0.9 5,431 0.7 Research & Consulting Services 21,896 3.3 23,822 3.2 Specialized Consumer Services 37,819 5.7 36,225 4.9 Specialized Finance (1) — — — — Systems Software 17,847 2.7 19,160 2.6 Technology Hardware, Storage & Peripherals 16,693 2.5 23,117 3.1 Total (1) $ 660,068 100.0 % $ 743,601 100.0 % (1) Excludes investments in STRS JV. |
| Schedule of forward currency contracts | Below is a listing of STRS JV’s individual investments as of December 31, 2022: Issuer Investment Type (1) Floor Reference Rate (2) Spread Above Index Interest Rate (3) Acquisition Date (4) Maturity Date Principal/ Share Amount Amortized Cost Fair Value (5) Fair Value As A Percentage of Members' Equity North America Debt Investments Advertising I&I Sales Group, LLC (d/b/a Avision Sales Group) First Lien Secured Term Loan 1.00% LIBOR 5.75% 10.48% 02/18/22 12/15/26 9,193 $ 9,047 $ 9,007 29.79 % I&I Sales Group, LLC (d/b/a Avision Sales Group) (6) First Lien Secured Delayed Draw Loan 1.00% LIBOR 5.75% 10.43% 03/11/22 12/15/26 2,756 2,713 2,699 8.93 I&I Sales Group, LLC (d/b/a Avision Sales Group) First Lien Secured Revolving Loan 1.00% LIBOR 5.75% 10.43% 02/18/22 12/15/26 — — (3) — 11,760 11,703 38.70 Air Freight & Logistics ITS Buyer Inc. First Lien Secured Term Loan 1.00% LIBOR 6.00% 10.73% 02/17/22 06/15/26 3,577 3,523 3,542 11.71 ITS Buyer Inc. First Lien Secured Revolving Loan 1.00% LIBOR 6.00% 10.73% 02/17/22 06/15/26 — — 3 0.01 3,523 3,545 11.72 Application Software MEP-TS Midco, LLC (d/b/a Tax Slayer) First Lien Secured Term Loan 1.00% LIBOR 6.00% 10.38% 01/21/21 12/31/26 13,353 13,162 13,353 44.16 MEP-TS Midco, LLC (d/b/a Tax Slayer) First Lien Secured Revolving Loan 1.00% LIBOR 6.00% 10.38% 01/21/21 12/31/26 — — 22 0.07 13,162 13,375 44.23 Building Products Drew Foam Companies Inc First Lien Secured Term Loan 1.00% SOFR 6.75% 11.48% 11/09/20 11/05/25 14,270 14,105 14,132 46.73 14,105 14,132 46.73 Construction & Engineering Road Safety Services, Inc. First Lien Secured Term Loan 1.00% SOFR 6.50% 10.92% 12/31/19 03/18/25 8,603 8,522 8,432 27.88 8,522 8,432 27.88 Data Processing & Outsourced Services Geo Logic Systems Ltd. (7) First Lien Secured Term Loan 1.00% CDOR 6.50% 11.38% 01/22/20 12/19/24 20,088 15,413 14,545 48.10 Geo Logic Systems Ltd. (7) First Lien Secured Revolving Loan 1.00% CDOR 6.50% 11.38% 01/22/20 12/19/24 — — (9) (0.03) 15,413 14,536 48.07 Diversified Support Services Quest Events, LLC First Lien Secured Term Loan 1.00% LIBOR 6.00% 10.73% 07/19/19 12/28/24 11,805 11,728 11,298 37.36 Quest Events, LLC First Lien Secured Revolving Loan 1.00% LIBOR 6.00% 10.73% 07/19/19 12/28/24 468 464 431 1.43 12,192 11,729 38.79 Electronic Equipment & Instruments LMG Holdings, Inc. First Lien Secured Term Loan 1.00% LIBOR 6.50% 11.23% 06/28/21 04/30/26 13,466 13,284 13,193 43.63 LMG Holdings, Inc. First Lien Secured Revolving Loan 1.00% LIBOR 6.50% 11.23% 06/28/21 04/30/26 — — (6) (0.02) 13,284 13,187 43.61 Environmental & Facilities Services Juniper Landscaping Holdings LLC First Lien Secured Term Loan 1.00% LIBOR 6.00% 11.15% 03/01/22 12/29/26 11,306 11,147 11,079 36.64 Juniper Landscaping Holdings LLC (6) First Lien Secured Delayed Draw Loan 1.00% LIBOR 6.00% 11.14% 03/01/22 12/29/26 1,909 1,882 1,868 6.18 Juniper Landscaping Holdings LLC First Lien Secured Revolving Loan 1.00% LIBOR 6.00% 10.54% 03/01/22 12/29/26 298 294 287 0.95 WH Lessor Corp. (d/b/a Waste Harmonics, LLC) First Lien Secured Term Loan 1.00% LIBOR 5.59% 9.97% 01/22/20 12/26/24 7,470 7,402 7,470 24.70 WH Lessor Corp. (d/b/a Waste Harmonics, LLC) First Lien Secured Revolving Loan 1.00% LIBOR 5.59% 9.97% 01/22/20 12/26/24 — — 4 0.01 20,725 20,708 68.48 Issuer Investment Type (1) Floor Reference Rate (2) Spread Above Index Interest Rate (3) Acquisition Date (4) Maturity Date Principal/ Share Amount Amortized Cost Fair Value (5) Fair Value As A Percentage of Members' Equity Household Appliances Smalto Inc. (d/b/a PEMCO International) (9) First Lien Secured Term Loan 1.00% EurIBOR 6.25% 9.00% 05/04/22 04/28/28 6,642 $ 6,865 $ 6,899 22.81 % Smalto Inc. (d/b/a PEMCO International) First Lien Secured Term Loan 1.00% SOFR 6.00% 11.04% 05/04/22 04/28/28 1,012 994 986 3.26 7,859 7,885 26.08 Industrial Machinery BLP Buyer, Inc. (d/b/a Bishop Lifting Products, Inc.) First Lien Secured Term Loan 1.25% SOFR 6.25% 10.49% 02/18/22 02/01/27 8,188 8,054 7,939 26.25 BLP Buyer, Inc. (d/b/a Bishop Lifting Products, Inc.) First Lien Secured Revolving Loan 1.00% SOFR 6.25% 10.67% 02/18/22 02/01/27 274 270 259 0.86 Pennsylvania Machine Works, LLC (d/b/a Penn Western) First Lien Secured Term Loan 1.00% SOFR 6.25% 11.09% 03/25/22 03/08/27 6,907 6,821 6,801 22.49 15,145 14,999 49.60 Internet & Direct Marketing Retail Marlin DTC-LS Midco 2, LLC (d/b/a Clarus Commerce, LLC) First Lien Secured Term Loan 1.00% LIBOR 6.50% 11.23% 07/19/19 07/01/25 19,105 18,920 19,105 63.18 Marlin DTC-LS Midco 2, LLC (d/b/a Clarus Commerce, LLC) First Lien Secured Revolving Loan 1.00% LIBOR 6.50% 11.23% 07/19/19 07/01/25 — — 8 0.03 18,920 19,113 63.21 Investment Banking & Brokerage TOUR Intermediate Holdings, LLC First Lien Secured Term Loan 1.00% LIBOR 6.50% 10.88% 05/19/20 05/15/25 3,077 3,049 3,077 10.18 TOUR Intermediate Holdings, LLC First Lien Secured Delayed Draw Loan 1.00% LIBOR 6.50% 10.88% 05/19/20 05/15/25 2,468 2,458 2,468 8.16 5,507 5,545 18.34 IT Consulting & Other Services Cennox Holdings Limited (d/b/a Cennox) (8) First lien Secured Term Loan 1.00% LIBOR 6.00% 10.02% 07/16/21 05/04/26 2,837 3,863 3,343 11.06 Cennox Holdings Limited (d/b/a Cennox) (9) First lien Secured Term Loan 1.00% LIBOR 6.25% 10.99% 06/28/22 05/04/26 9,458 9,834 9,926 32.83 Cennox Holdings Limited (d/b/a Cennox) (8) First lien Secured Revolving Loan 1.00% LIBOR 6.00% 10.99% 07/16/21 05/04/26 — — (161) (0.53) RCKC Acquisitions LLC (d/b/a KSM Consulting, LLC) First Lien Secured Term Loan 1.00% LIBOR 6.25% 10.98% 01/27/21 12/31/26 11,150 11,000 10,929 36.14 RCKC Acquisitions LLC (d/b/a KSM Consulting, LLC) First Lien Secured Delayed Draw Loan 1.00% LIBOR 6.25% 10.65% 01/27/21 12/31/26 3,007 2,963 2,947 9.75 RCKC Acquisitions LLC (d/b/a KSM Consulting, LLC) (6) First Lien Secured Revolving Loan 1.00% LIBOR 6.25% 10.60% 01/27/21 12/31/26 533 526 517 1.71 Turnberry Solutions, Inc. First Lien Secured Term Loan 1.00% SOFR 6.00% 9.19% 08/10/21 09/02/26 6,087 5,998 5,964 19.72 Turnberry Solutions, Inc. First Lien Secured Revolving Loan 1.00% SOFR 6.00% 9.19% 08/10/21 09/02/26 — — (4) (0.01) 34,184 33,461 110.66 Packaged Foods & Meats Poultry Holdings LLC (HPP) First Lien Secured Term Loan 1.00% SOFR 7.25% 11.67% (10.17% Cash + 1.50% PIK) 10/21/19 06/28/25 7,162 7,101 7,011 23.19 Stella & Chewy's LLC First Lien Secured Term Loan 1.00% SOFR 8.75% 13.40% (11.40% Cash + 2.00% PIK) 12/29/20 12/16/25 3,893 3,849 3,738 12.36 Stella & Chewy's LLC First Lien Secured Delayed Draw Loan 1.00% SOFR 8.75% 13.17% (11.17% Cash + 2.00% PIK) 03/26/21 12/16/25 1,375 1,362 1,320 4.37 12,312 12,069 39.91 Paper Packaging Max Solutions, Inc. First Lien Secured Term Loan 1.00% SOFR 6.50% 11.23% 10/07/22 09/29/28 8,244 8,085 8,085 26.74 Max Solutions, Inc. (6) First Lien Secured Delayed Draw Loan 1.00% SOFR 6.50% 11.23% 10/07/22 09/29/28 — — (26) (0.09) Max Solutions, Inc. (10) First Lien Secured Revolving Loan 1.00% CDOR 6.50% 11.23% 10/07/22 09/29/28 — — — — Max Solutions, Inc. (6) First Lien Secured Revolving Loan 1.00% SOFR 6.50% 11.23% 10/07/22 09/29/28 — — — — 8,085 8,059 26.65 Issuer Investment Type (1) Floor Reference Rate (2) Spread Above Index Interest Rate (3) Acquisition Date (4) Maturity Date Principal/ Share Amount Amortized Cost Fair Value (5) Fair Value As A Percentage of Members' Equity Personal Products Sunless, Inc. First Lien Secured Term Loan 1.00% LIBOR 6.50% 11.23% 10/21/19 08/13/25 3,679 $ 3,631 $ 3,679 12.18 % Sunless, Inc. (6) First Lien Secured Revolving Loan 1.00% LIBOR 6.50% 11.24% 10/21/19 08/13/25 266 264 270 0.89 3,895 3,949 13.06 Pharmaceuticals Meta Buyer LLC (d/b/a Metagenics, Inc.) (9) First Lien Secured Term Loan 1.00% EurIBOR 6.00% 8.17% 12/16/21 11/01/27 12,287 13,643 12,876 42.57 Meta Buyer LLC (d/b/a Metagenics, Inc.) First Lien Secured Term Loan 1.00% SOFR 6.00% 10.62% 12/16/21 11/01/27 981 966 963 3.18 Meta Buyer LLC (d/b/a Metagenics, Inc.) First Lien Secured Delayed Draw Loan 1.00% SOFR 6.00% 10.81% 10/01/22 11/01/27 892 878 876 2.90 Meta Buyer LLC (d/b/a Metagenics, Inc.) First Lien Secured Revolving Loan 1.00% SOFR 6.00% 10.81% 12/16/21 11/01/27 — — (3) (0.01) 15,487 14,712 48.65 Real Estate Operating Companies HRG Management, LLC (d/b/a HomeRiver Group, LLC) First Lien Secured Term Loan 1.00% LIBOR 6.25% 10.48% 12/28/21 10/19/26 9,653 9,505 9,412 31.13 HRG Management, LLC (d/b/a HomeRiver Group, LLC) (6)(11) First Lien Secured Delayed Draw Loan 1.00% Base Rate 6.10% 10.92% 02/18/22 10/19/26 1,768 1,741 1,720 5.69 HRG Management, LLC (d/b/a HomeRiver Group, LLC) First Lien Secured Revolving Loan 1.00% LIBOR 6.25% 10.48% 02/18/22 10/19/26 — — (11) (0.04) 11,246 11,121 36.78 Real Estate Services NPAV Lessor Corp. (d/b/a Nationwide Property & Appraisal Services, LLC) First Lien Secured Term Loan 1.00% SOFR 6.50% 10.92% 03/01/22 01/21/27 8,924 8,778 8,301 27.45 NPAV Lessor Corp. (d/b/a Nationwide Property & Appraisal Services, LLC) First Lien Secured Revolving Loan 1.00% SOFR 6.50% 10.92% 03/01/22 01/21/27 290 285 247 0.82 9,063 8,548 28.27 Research & Consulting Services E-Phoenix Acquisition Co. Inc. (d/b/a Integreon, Inc.) First Lien Secured Term Loan 1.00% LIBOR 5.50% 10.23% 07/15/21 06/23/27 8,865 8,782 8,686 28.72 8,782 8,686 28.72 Technology Hardware, Storage & Peripherals Source Code Holdings, LLC (d/b/a Source Code Corporation) First Lien Secured Term Loan 1.00% SOFR 6.50% 10.92% 08/10/21 07/30/27 15,105 14,874 14,882 49.21 Source Code Holdings, LLC (d/b/a Source Code Corporation) (6) First Lien Secured Delayed Draw Loan 1.00% SOFR 6.50% 10.92% 08/10/21 07/30/27 — — 2 0.01 14,874 14,884 49.22 Trading Companies & Distributors LINC Systems, LLC First Lien Secured Term Loan 1.00% LIBOR 6.25% 10.42% 06/22/21 02/24/26 10,033 9,895 9,882 32.68 LINC Systems, LLC First Lien Secured Revolving Loan 1.00% LIBOR 6.25% 10.42% 06/22/21 02/24/26 — — (1) (0.00) 9,895 9,881 32.68 Total Investments $ 287,940 $ 284,259 940.04 % (1) Except as noted, all investments provide collateral for the STRS JV Credit Facility. (2) The investments bear interest at a rate that may be determined by reference to LIBOR, which resets monthly, quarterly or semiannually, SOFR, CDOR, Prime, Euro Interbank Offered Rate (“EurIBOR” or “E”). (3) The interest rate is the “all-in-rate” including the current index and spread, the fixed rate, and the PIK interest rate, as the case may be. (4) Except as otherwise noted, all of the STRS JV’s portfolio company investments, which as of the date of the portfolio represented 940% of STRS JV’s members’ equity or 93% of STRS JV’s total assets, are subject to legal restrictions on sales. (5) The fair value of each investment was determined using significant unobservable inputs. (6) The investment or a portion of the investment does not provide collateral for the STRS JV Credit Facility. (7) Principal amount is denominated in Canadian dollars and the issuer is domiciled in Canada. (8) Principal amount is denominated in British Pounds and the issuer is domiciled in the United Kingdom. (9) Principal amount is denominated in Euros. (10) Principal amount is denominated in Canadian dollars. (11) The investment was comprised of two contracts, which were indexed to different base rates, L and P, respectively. The Floor, Spread Above Index and Interest Rate presented represent the weighted average of both contracts. Below is a listing of STRS JV’s individual investments as of December 31, 2021: Issuer Investment Type (1) Floor Spread Above Index (2) Interest Rate (3) Acquisition Date (4) Maturity Date Principal/ Share Amount Amortized Cost Fair Value (5) Fair Value As A Percentage of Member's Equity North America Debt Investments Application Software MEP-TS Midco, LLC (d/b/a Tax Slayer) First Lien Secured Term Loan 1.00% L+ 6.00% 7.00% 01/21/21 12/31/26 13,490 $ 13,247 $ 13,490 51.86 % MEP-TS Midco, LLC (d/b/a Tax Slayer) First Lien Secured Revolving Loan 1.00% L+ 6.00% 7.00% 01/21/21 12/31/26 — — 28 0.11 13,247 13,518 51.97 Building Products Drew Foam Companies Inc First Lien Secured Term Loan 1.00% L+ 6.00% 7.00% 11/09/20 11/05/25 7,207 7,096 7,183 27.61 LHS Borrower, LLC (d/b/a Leaf Home, LLC) First Lien Secured Term Loan 1.00% L+ 6.75% 7.75% 10/09/20 09/30/25 9,506 9,345 9,416 36.20 LHS Borrower, LLC (d/b/a Leaf Home, LLC) First Lien Secured Revolving Loan 1.00% L+ 6.75% 7.75% 10/09/20 09/30/25 — — 4 0.02 16,441 16,603 63.83 Construction & Engineering Road Safety Services, Inc. First Lien Secured Term Loan 1.00% L+ 6.50% 7.50% 12/31/19 03/18/25 6,427 6,340 6,405 24.62 Road Safety Services, Inc. First Lien Secured Revolving Loan 3.25% P+ 5.50% 8.75% 12/31/19 09/18/23 496 489 501 1.93 Tensar Corporation First Lien Secured Term Loan 1.00% L+ 6.75% 7.75% 11/24/20 08/20/25 6,930 6,797 7,069 27.18 13,626 13,975 53.73 Data Processing & Outsourced Services Geo Logic Systems Ltd. (7) First Lien Secured Term Loan 1.00% C+ 6.50% 7.50% 01/22/20 12/19/24 20,632 15,766 16,156 62.11 Geo Logic Systems Ltd. (7) First Lien Secured Revolving Loan 1.00% C+ 6.50% 7.50% 01/22/20 12/19/24 — — 4 0.02 15,766 16,160 62.13 Diversified Support Services Quest Events, LLC (10) First Lien Secured Term Loan 1.00% L+ 6.00% 7.00% 07/19/19 12/28/24 11,966 11,848 9,729 37.40 Quest Events, LLC (10) First Lien Secured Revolving Loan 1.00% L+ 6.00% 7.00% 07/19/19 12/28/24 935 925 760 2.92 12,773 10,489 40.32 Electronic Equipment & Instruments LMG Holdings, Inc. First Lien Secured Term Loan 1.00% L+ 6.50% 7.50% 06/28/21 04/30/26 6,802 6,680 6,687 25.71 LMG Holdings, Inc. First Lien Secured Revolving Loan 1.00% L+ 6.50% 7.50% 06/28/21 04/30/26 — — — — 6,680 6,687 25.71 Environmental & Facilities Services WH Lessor Corp. (d/b/a Waste Harmonics, LLC) First Lien Secured Term Loan 1.00% L+ 6.00% 7.00% 01/22/20 12/26/24 6,870 6,780 6,866 26.40 WH Lessor Corp. (d/b/a Waste Harmonics, LLC) First Lien Secured Revolving Loan 1.00% L+ 6.00% 7.00% 01/22/20 12/26/24 — — 6 0.02 6,780 6,872 26.42 Industrial Machinery FR Flow Control CB LLC First Lien Secured Term Loan B 1.00% L+ 5.50% 6.50% 07/19/19 06/28/26 6,815 6,727 6,815 26.20 6,727 6,815 26.20 Internet & Direct Marketing Retail Marlin DTC-LS Midco 2, LLC (d/b/a Clarus Commerce, LLC) First Lien Secured Term Loan 1.00% L+ 6.50% 7.50% 07/19/19 07/01/25 15,342 15,153 15,342 58.98 Marlin DTC-LS Midco 2, LLC (d/b/a Clarus Commerce, LLC) First Lien Secured Revolving Loan 1.00% L+ 6.50% 7.50% 07/19/19 07/01/25 — — 11 0.04 15,153 15,353 59.02 Issuer Investment Type (1) Floor Spread Above Index (2) Interest Rate (3) Acquisition Date (4) Maturity Date Principal/ Share Amount Amortized Cost Fair Value (5) Fair Value As A Percentage of Member's Equity Investment Banking & Brokerage TOUR Intermediate Holdings, LLC First Lien Secured Term Loan 1.00% L+ 6.50% 7.50% 05/19/20 05/15/25 7,438 $ 7,343 $ 7,438 28.59 % TOUR Intermediate Holdings, LLC First Lien Secured Delayed Draw Loan 1.00% L+ 6.50% 7.50% 05/19/20 05/15/25 2,616 2,600 2,616 10.06 9,943 10,054 38.65 IT Consulting & Other Services Cennox, Inc. (d/b/a Cennox) First Lien Secured Term Loan 1.00% L+ 6.00% 7.00% 06/28/21 05/04/26 8,525 8,365 8,438 32.44 Cennox, Inc. (d/b/a Cennox) First Lien Secured Delayed Draw Loan 1.00% L+ 6.00% 7.00% 06/28/21 05/04/26 8,915 8,755 8,915 34.27 Cennox, Inc. (d/b/a Cennox) First Lien Secured Revolving Loan 1.00% L+ 6.00% 7.00% 06/28/21 05/04/26 561 551 569 2.19 Cennox Holdings Limited (d/b/a Cennox) (8) First lien Secured Term Loan 1.00% L+ 6.00% 7.00% 07/16/21 05/04/26 2,866 3,889 3,877 14.90 Cennox Holdings Limited (d/b/a Cennox) (8) First lien Secured Revolving Loan 1.00% L+ 6.00% 7.00% 07/16/21 05/04/26 864 1,173 1,169 4.49 RCKC Acquisitions LLC (d/b/a KSM Consulting, LLC) First Lien Secured Term Loan 1.00% L+ 6.25% 7.25% 01/27/21 12/31/26 11,264 11,074 11,151 42.87 RCKC Acquisitions LLC (d/b/a KSM Consulting, LLC) (6) First Lien Secured Delayed Draw Loan 1.00% L+ 6.25% 7.25% 01/27/21 12/31/26 — — (5) (0.02) RCKC Acquisitions LLC (d/b/a KSM Consulting, LLC) (6) First Lien Secured Revolving Loan 1.00% L+ 6.25% 7.25% 01/27/21 12/31/26 818 804 814 3.13 Turnberry Solutions, Inc. First Lien Secured Term Loan 1.00% L+ 6.00% 7.00% 08/10/21 09/02/26 5,791 5,689 5,684 21.85 Turnberry Solutions, Inc. First Lien Secured Revolving Loan 3.25% P+ 5.00% 8.25% 08/10/21 09/02/26 86 84 85 0.33 40,384 40,697 156.45 Leisure Products Unleashed Brands, LLC (d/b/a Unleashed Brands Group) First Lien Secured Term Loan 1.00% L+ 5.50% 6.50% 11/30/21 11/19/26 3,887 3,848 3,848 14.79 Unleashed Brands, LLC (d/b/a Unleashed Brands Group) (6) First Lien Secured Delayed Draw Loan 1.00% L+ 5.50% 6.50% 11/30/21 11/19/26 5,133 5,083 5,082 19.54 Unleashed Brands, LLC (d/b/a Unleashed Brands Group) First Lien Secured Revolving Loan 1.00% L+ 5.50% 6.50% 11/30/21 11/19/26 — — — — 8,931 8,930 34.33 Packaged Foods & Meats Mikawaya Holdings, LLC (aka MyMo) First Lien Secured Term Loan 1.25% L+ 5.50% 6.75% 02/18/20 01/29/25 3,026 2,988 3,026 11.63 Poultry Holdings LLC (HPP) First Lien Secured Term Loan 1.00% L+ 7.25% 8.25% (6.75% Cash + 1.50% PIK) 10/21/19 06/28/25 7,770 7,676 6,993 26.88 Stella & Chewy's LLC First Lien Secured Term Loan 1.00% L+ 6.75% 7.75% 12/29/20 12/16/25 5,313 5,228 4,967 19.10 Stella & Chewy's LLC (6) First Lien Secured Delayed Draw Loan 1.00% L+ 6.75% 7.75% 12/29/20 12/16/25 1,893 1,877 1,697 6.52 Westrock Coffee Company, LLC First Lien Secured Term Loan 1.50% L+ 8.50% 10.00% (9.75% Cash + 0.25% PIK) 03/20/20 02/28/25 9,105 9,033 8,923 34.31 26,802 25,606 98.44 Personal Products Sunless, Inc. First Lien Secured Term Loan 1.00% L+ 6.00% 7.00% 10/21/19 08/13/24 4,259 4,185 4,259 16.38 Sunless, Inc. (6) First Lien Secured Revolving Loan 1.00% L+ 6.00% 7.00% 10/21/19 08/13/24 — — 14 0.05 4,185 4,273 16.43 Pharmaceuticals Meta Buyer LLC (d/b/a Metagenics, Inc.) (9) First Lien Secured Term Loan 1.00% E + 6.00% 7.00% 12/16/21 11/01/27 12,411 13,737 13,843 53.21 Meta Buyer LLC (d/b/a Metagenics, Inc.) First Lien Secured Term Loan 1.00% L+ 6.00% 7.00% 12/16/21 11/01/27 991 972 972 3.74 Meta Buyer LLC (d/b/a Metagenics, Inc.) First Lien Secured Delayed Draw Loan 1.00% L+ 6.00% 7.00% 12/16/21 11/01/27 — — — — Meta Buyer LLC (d/b/a Metagenics, Inc.) First Lien Secured Revolving Loan 1.00% L+ 6.00% 7.00% 12/16/21 11/01/27 251 246 246 0.95 14,955 15,061 57.90 Issuer Investment Type (1) Floor Spread Above Index (2) Interest Rate (3) Acquisition Date (4) Maturity Date Principal/ Share Amount Amortized Cost Fair Value (5) Fair Value As A Percentage of Member's Equity Real Estate Operating Companies HRG Management, LLC (d/b/a HomeRiver Group, LLC) First Lien Secured Term Loan 1.00% L+ 6.25% 7.25% 12/28/21 10/19/26 4,875 $ 4,781 $ 4,780 18.38 % 4,781 4,780 18.38 Research & Consulting Services E-Phoenix Acquisition Co. Inc. (d/b/a Integreon, Inc.) First Lien Secured Term Loan 1.00% L+ 5.75% 6.75% 07/15/21 06/23/27 8,955 8,852 8,901 34.22 8,852 8,901 34.22 Systems Software IDIG Parent, LLC (d/b/a IDIQ) First Lien Secured Term Loan 1.00% L+ 6.00% 7.00% 06/25/21 12/15/26 8,482 8,404 8,482 32.61 IDIG Parent, LLC (d/b/a IDIQ) First Lien Secured Delayed Draw Loan 1.00% L+ 6.00% 7.00% 09/21/21 12/15/26 1,411 1,397 1,411 5.42 IDIG Parent, LLC (d/b/a IDIQ) First Lien Secured Revolving Loan 1.00% L+ 6.00% 7.00% 06/25/21 12/15/26 — — 5 0.02 9,801 9,898 38.05 Technology Hardware, Storage & Peripherals PS Lightwave, Inc. First Lien Secured Term Loan 1.50% L+ 6.75% 8.25% 05/19/20 03/10/25 7,304 7,207 7,230 27.79 PS Lightwave, Inc. (6) First Lien Secured Delayed Draw Loan 1.50% L+ 6.75% 8.25% 05/19/20 03/10/25 — — 5 0.02 Source Code Holdings, LLC (d/b/a Source Code Corporation) First Lien Secured Term Loan 1.00% L+ 6.50% 7.50% 08/10/21 07/30/27 7,629 7,487 7,489 28.79 Source Code Holdings, LLC (d/b/a Source Code Corporation) (6) First Lien Secured Delayed Draw Loan 1.00% L+ 6.50% 7.50% 08/10/21 07/30/27 — — 1 0.00 14,694 14,725 56.61 Trading Companies & Distributors LINC Systems, LLC First Lien Secured Term Loan 1.00% L+ 6.25% 7.25% 06/22/21 02/24/26 10,135 9,951 10,101 38.83 LINC Systems, LLC First Lien Secured Revolving Loan 1.00% L+ 6.25% 7.25% 06/22/21 02/24/26 — — 12 0.05 9,951 10,113 38.88 Total Investments $ 260,472 $ 259,510 997.65 % (1) Except as noted, all investments provide collateral for the Company’s Credit Facility. (2) The investments bear interest at a rate that may be determined by reference to LIBOR, which resets monthly, quarterly or semiannually, CDOR, or Prime. The one-, three- and six-month LIBOR were 0.10% , 0.21% and 0.34% , respectively, as of December 31, 2021. The one-, three- and six-month GBP LIBOR were 0.19% , 0.26% and 0.47% , respectively, as of December 31, 2021. The three month Euro EurIBOR, CDOR and Prime were ( 0.57 )%, 0.52% and 3.25% , respectively, as of December 31, 2021. (3) The interest rate is the “all-in-rate” including the current index and spread, the fixed rate, and the payment-in-kind (“PIK”) interest rate, as the case may be. (4) Except as otherwise noted, all of the Company’s portfolio company investments, which as of the date of the portfolio represented 998% of the Company’s members’ equity or 95% of the Company’s total assets, are subject to legal restrictions on sales. (5) The fair value of each investment was determined using significant unobservable inputs. (6) The investment or a portion of the investment does not provide collateral for the Company’s Credit Facility. (7) Principal amount is denominated in Canadian dollars and the issuer is domiciled in Canada. (8) Principal amount is denominated in British Pounds and the issuer is domiciled in the United Kingdom. (9) Principal amount is denominated in Euros. (10) At the option of the issuer, interest can be paid in cash or cash and PIK. The issuer may elect to pay up to 7.00% PIK. |
| Schedule of selected Balance Sheet Information | Selected Balance Sheet Information ($ in thousands) As of December 31, 2022 As of December 31, 2021 Assets Investments, at fair value (amortized cost of $287,940 and $260,472, respectively) $ 284,259 $ 259,510 Cash and cash equivalents 18,960 13,004 Interest receivable 1,404 735 Unrealized appreciation on foreign currency forward contracts — 19 Other assets 673 255 Total assets $ 305,296 $ 273,523 Liabilities Credit facility (net of unamortized debt issuance costs of $1,643 and $1,779, respectively) $ 150,634 $ 145,003 Note payable to members 120,000 100,000 Interest payable on credit facility 796 282 Interest payable on notes to members 3,069 1,575 Unrealized depreciation on foreign currency forward contracts 75 — Other liabilities 483 651 Total liabilities 275,057 247,511 Members’ equity 30,239 26,012 Total liabilities and members’ equity $ 305,296 $ 273,523 |
| Schedule of selected Statement of Operations Information | For the Year Ended For the Year Ended For the Year Ended December 31, 2022 December 31, 2021 December 31, 2020 Selected Statement of Operations Information ($ in thousands) (Unaudited) Interest and fee income $ 28,956 $ 18,819 $ 13,316 Total investment income $ 28,956 $ 18,819 $ 13,316 Interest expense on credit facility 7,470 4,105 3,256 Interest expense on notes to members 9,680 5,512 4,465 Administrative fee 629 443 308 Other expenses 564 498 317 Total expenses $ 18,343 $ 10,558 $ 8,346 Net investment income 10,613 8,261 4,970 Net realized gains (losses) on investments and foreign currency transactions 329 (55) (10) Net change in unrealized appreciation (depreciation) on investments and foreign currency transactions (875) 1,153 (2,799) Net increase in members’ equity resulting from operations $ 10,067 $ 9,359 $ 2,161 |
| STRS JV | |
| Schedule of Investments [Line Items] | |
| Schedule of individual investments | Dividends and Beginning Net Change in Ending Fair interest Fair Value at Net Unrealized Value at Type of included in December 31, Realized Appreciation December 31, Affiliated Person (1) Asset income 2021 Purchases Sales Gain (Loss) (Depreciation) 2022 Non-controlled affiliates Arcole Holding Corporation Equity $ 321 $ 6,874 $ — $ — $ — $ (494) $ 6,380 PlayMonster LLC First Lien Secured Revolving Loan 13 — 1,088 (1,088) — — — Playmonster Group LLC Priority First Lien Secured Loan 1 — 176 — — — 176 Playmonster Group LLC First Lien Secured Loan 325 — 3,662 — — (685) 2,977 Playmonster Group Equity, Inc. (d/b/a PlayMonster) Preferred Equity — — 3,600 — — (3,600) — Playmonster Group Equity, Inc. (d/b/a PlayMonster) Common Equity — — 460 — — (460) — Total Non-controlled affiliates $ 660 $ 6,874 $ 8,986 $ (1,088) $ — $ (5,239) $ 9,533 Controlled affiliates WHF STRS Ohio Senior Loan Fund LLC* Subordinated Note $ 6,385 $ 60,000 $ 20,000 $ — $ — $ — $ 80,000 WHF STRS Ohio Senior Loan Fund LLC* Equity 6,977 15,607 5,000 — — (447) 20,160 Total Controlled affiliates $ 13,362 $ 75,607 $ 25,000 $ — $ — $ (447) $ 100,160 * The Company and STRS Ohio are the members of STRS JV, a joint venture formed as a Delaware limited liability company that is not consolidated by either member for financial reporting purposes. The members make investments in STRS JV in the form of limited liability company (“LLC”) equity interests and interest-bearing subordinated notes as STRS JV makes investments, and all portfolio and other material decisions regarding STRS JV must be submitted to STRS JV’s board of managers which is comprised of an equal number of members appointed by each of the Company and STRS Ohio. Because management of STRS JV is shared equally between the Company and STRS Ohio, the Company does not believe it controls STRS JV for purposes of the 1940 Act or otherwise. (1) Refer to the consolidated schedule of investments for the principal amount, industry classification and other security detail of each portfolio company. Dividends and Beginning Fair Net Change in Ending Fair interest Value at Net Unrealized Value at Type of included in December 31, Realized Appreciation December 31, Affiliated Person (1) Asset income 2020 Purchases Sales Gain (Loss) (Depreciation) 2021 Non-controlled affiliates Arcole Holding Corporation Equity $ 897 $ 6,448 $ — $ — $ — $ 426 $ 6,874 NMFC Senior Loan Program I LLC Units Equity 293 9,269 — (10,000) — 761 — Total Non-controlled affiliates $ 1,190 $ 15,717 $ — $ (10,000) $ — $ 1,187 $ 6,874 Controlled affiliates WHF STRS Ohio Senior Loan Fund LLC* Subordinated Note $ 3,307 $ 41,073 $ 18,927 $ — $ — $ — $ 60,000 WHF STRS Ohio Senior Loan Fund LLC* Equity 4,907 10,167 4,732 — — 708 15,607 Total Controlled affiliates $ 8,214 $ 51,240 $ 23,659 $ — $ — $ 708 $ 75,607 * The Company and STRS Ohio are the members of STRS JV, a joint venture formed as a Delaware limited liability company that is not consolidated by either member for financial reporting purposes. The members make investments in STRS JV in the form of limited liability company (“LLC”) equity interests and interest-bearing subordinated notes as STRS JV makes investments, and all portfolio and other material decisions regarding STRS JV must be submitted to STRS JV’s board of managers which is comprised of an equal number of members appointed by each of the Company and STRS Ohio. Because management of STRS JV is shared equally between the Company and STRS Ohio, the Company does not believe it controls STRS JV for purposes of the 1940 Act or otherwise. (1) Refer to the consolidated schedule of investments for the principal amount, industry classification and other security detail of each portfolio company. |
FAIR VALUE MEASUREMENTS (Tables
| FAIR VALUE MEASUREMENTS (Tables) | 12 Months Ended |
| Dec. 31, 2022 | |
| FAIR VALUE MEASUREMENTS | |
| Schedule of investments measured at fair value | The following table presents investments (as shown on the consolidated schedule of investments) that were measured at fair value as of December 31, 2022: Level 1 Level 2 Level 3 Total First lien secured loans $ — $ — $ 618,267 $ 618,267 Second lien secured loans — — 20,634 20,634 Subordinated unsecured loans — — 167 167 Subordinated Note to STRS JV — — 80,000 80,000 Equity (excluding STRS JV) — — 21,000 21,000 Equity in STRS JV (1) — — — 20,160 Total investments $ — $ — $ 740,068 $ 760,228 (1) The Company’s equity investment in STRS JV is measured using the net asset value per share as a practical expedient for fair value, and thus has not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the consolidated statements of assets and liabilities. The Company’s forward currency contracts, which were valued at ($3) as of December 31, 2022, are characterized in Level 2 of the hierarchy. The following table presents investments (as shown on the consolidated schedule of investments) that were measured at fair value as of December 31, 2021: Level 1 Level 2 Level 3 Total First lien secured loans $ — $ — $ 697,232 $ 697,232 Second lien secured loans — — 23,650 23,650 Subordinated unsecured loans — — 167 167 Subordinated Note to STRS JV — — 60,000 60,000 Equity (excluding STRS JV) — — 22,552 22,552 Equity in STRS JV (1) — — — 15,607 Total investments $ — $ — $ 803,601 $ 819,208 (1) The Company’s equity investment in STRS JV is measured using the NAV per share as a practical expedient for fair value, and thus has not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the consolidated statements of assets and liabilities. |
| Schedule of changes in investments measured at fair value using Level 3 inputs | The following table presents the changes in investments measured at fair value using Level 3 inputs for the year ended December 31, 2022: First Lien Second Lien Subordinated Secured Secured Subordinated Notes to STRS Total Year ended December 31, 2022 Loans Loans Notes JV Equity Investments Fair value, beginning of period $ 697,232 $ 23,650 $ 167 $ 60,000 $ 22,552 $ 803,601 Funding of investments 278,236 — — 20,000 1,853 300,089 Non-cash interest income 2,217 138 — — — 2,355 Accretion of discount (premium) 5,540 86 — — — 5,626 Proceeds from paydowns and sales (343,181) — — — (4,900) (348,081) Conversions (4,060) — — — 4,060 — Realized gains (losses) (16,975) (1,024) — — 3,481 (14,518) Net unrealized (depreciation) appreciation (742) (2,216) — — (6,046) (9,004) Fair value, end of period $ 618,267 $ 20,634 $ 167 $ 80,000 $ 21,000 $ 740,068 Change in unrealized appreciation (depreciation) on investments still held as of December 31, 2022 $ (12,278) $ (3,241) $ — $ — $ (5,469) $ (20,988) The following table presents the changes in investments measured at fair value using Level 3 inputs for the year ended December 31, 2021: First Lien Second Lien Subordinated Secured Secured Subordinated Notes to STRS Total Year ended December 31, 2021 Loans Loans Notes JV Equity Investments Fair value, beginning of period $ 588,580 $ 27,596 $ — $ 41,073 $ 23,319 $ 680,568 Funding of investments 518,604 19,475 498 18,927 5,588 563,092 Non-cash interest income 1,159 5 — — — 1,164 Accretion of discount (premium) 6,605 241 — — (25) 6,821 Proceeds from paydowns and sales (413,333) (23,608) (331) — (10,019) (447,291) Realized gains (losses) 8,024 — — — (12) 8,012 Net unrealized (depreciation) appreciation (12,407) (59) — — 3,701 (8,765) Fair value, end of period $ 697,232 $ 23,650 $ 167 $ 60,000 $ 22,552 $ 803,601 Change in unrealized appreciation (depreciation) on investments still held as of December 31, 2021 $ (3,751) $ 123 $ — $ — $ 2,939 $ (689) |
| Schedule of Quantitative information about Level 3 fair value measurements | Fair Value as of Valuation Unobservable Range Investment Type December 31, 2022 Techniques Inputs (Weighted Average) (1) First lien secured loans $ 536,259 Discounted cash flow analysis Discount Rate 10.0% - 30.0% (13.8%) 67,878 Recent transaction Transaction Price 83.1 - 100.0 (95.0) 14,130 Expected repayment Transaction Price 100.0 - 101.0 (100.5) Second lien secured loans 20,634 Discounted cash flow analysis Discount Rate 13.2% - 25.0% (18.9%) Subordinated unsecured loans 167 Discounted cash flow analysis Discount Rate 4.0% - 4.0% (4.0%) Subordinated Notes to STRS JV 80,000 Enterprise Value Analysis n/a n/a Common Equity 9,990 Discounted cash flow analysis Discount Rate 15.6% - 25.9% (22.4%) 4,735 Enterprise Value Analysis EBITDA Multiple 5.0 - 11.8 (8.3) 400 Recent transaction Transaction Price 1.0 - 1.0 (1.0) Preferred Equity 714 Discounted cash flow analysis Discount Rate 20.0% - 22.5% (20.0%) 194 Enterprise Value Analysis EBITDA Multiple 8.0 - 9.5 (8.6) 926 Enterprise Value Analysis Revenue Multiple 0.5 - 0.5 (0.5) 200 Recent transaction Transaction Price 1.0 - 1.0 (1.0) Warrant 3,841 Discounted cash flow analysis Discount Rate 25.9% - 27.2% (27.2%) Total Level 3 Investments $ 740,068 (1) Unobservable inputs were weighted by the relative fair value of the investments. Fair Value as of Valuation Unobservable Range Investment Type December 31, 2021 Techniques Inputs (Weighted Average) (1) First lien secured loans $ 358,921 Discounted cash flows Discount rate 4.5% – 21.8% (9.8%) Exit EBITDA multiple 5.5x – 15.0x (8.3x) 209,892 Recent transaction Transaction price 94.5 – 99.1 (97.9) 113,808 Discounted cash flows and Recent transaction Discount rate 7.2% – 10.3% (8.6%) Transaction price 97.5 – 98.8 (98.4) Exit EBITDA multiple 7.0x – 11.0x (9.5x) 7,542 Guideline public companies LTM EBITDA multiple 5.1x 7,069 Expected repayment - - $ 697,232 Second lien secured loans $ 18,725 Discounted cash flows Discount rate 11.5% – 22.3% (14.2%) Exit EBITDA multiple 6.5x – 8.5x (8.0x) 4,925 Recent transaction Transaction price 98.5 $ 23,650 Subordinated Notes $ 60,000 Enterprise value - - 167 Recent transaction Transaction price 100.0 $ 60,167 Preferred Equity $ 1,018 Similar transactions LTM EBITDA multiple 9.7x Discount for lack of marketability 15.0% 786 Discounted cash flows and Guideline public companies sDiscount Rate 17.3% Exit EBITDA Multiple 11.0x LTM EBITDA Multiple 7.9x NFY EBITDA Multiple 7.5x Discount for lack of marketability 10.0% 1,007 Recent transaction Transaction price $1.00 – $56.30 ($47.13) per share $ 2,811 Common Equity $ 3,602 Discounted cash flows Discount rate 13.0% – 22.7% (15.0%) Exit EBITDA Multiple 8.6x – 10.0x (9.6x) Discount for lack of marketability 10.0% – 15.0% (10.3%) 8,124 Discounted cash flows, Guideline public companies and Expected repayment Discount rate 14.0% – 19.0% (18.2%) Exit EBITDA Multiple 8.0x – 11.0x (10.5x) NFY EBITDA Multiple 8.6x – 10.8x (8.9x) Discount for lack of marketability 10.0% Transaction price $1.00 per share 2,052 Similar transactions LTM EBITDA Multiple 6.0x – 13.4x (10.5x) 1,502 Recent transaction Transaction price $1.00 – $1,000.00 ($289.95) per share $ 15,280 Warrant 4,461 Discounted cash flows and Option-pricing method Discount rate 22.7% – 29.5% (29.2%) Exit EBITDA multiple 5.5x – 8.6x (5.9x) Volatility 3.5% – 8.7% (3.6%) Discount for lack of marketability 15.0% $ 4,461 Total Level 3 Investments $ 803,601 (1) Unobservable inputs were weighted by the relative fair value of the investments. |
| Schedule of principal amount and fair value of the Company's borrowings | As of December 31, 2022 As of December 31, 2021 Fair Principal Amount Principal Amount Value Level Outstanding Fair Value Outstanding Fair Value JPM Credit Facility 3 $ 255,145 $ 252,799 $ 291,637 $ 302,147 6.000% 2023 Notes 3 30,000 30,382 30,000 31,802 5.375% 2025 Notes 3 40,000 37,474 40,000 40,687 5.375% 2026 Notes 3 10,000 9,149 10,000 10,091 4.000% 2026 Notes 3 75,000 67,912 75,000 74,957 5.625% 2027 Notes 3 10,000 9,063 10,000 10,097 4.250% 2028 Notes 3 25,000 21,981 25,000 24,861 $ 445,145 $ 428,760 $ 481,637 $ 494,642 |
BORROWINGS (Tables)
| BORROWINGS (Tables) | 12 Months Ended |
| Dec. 31, 2022 | |
| BORROWINGS | |
| Schedule of borrowings outstanding and available | Total borrowings outstanding and available as of December 31, 2022, were as follows: Maturity Rate Principal Amount Outstanding Amortized Cost Available JPM Credit Facility (1) 11/22/2025 L+2.35 % $ 255,145 $ 252,799 $ 79,855 6.000% 2023 Notes 8/7/2023 6.00 % 30,000 29,893 — 5.375% 2025 Notes 10/20/2025 5.375 % 40,000 39,629 — 5.375% 2026 Notes 12/4/2026 5.375 % 10,000 9,885 — 4.000% 2026 Notes 12/15/2026 4.00 % 75,000 73,652 — 5.625% 2027 Notes 12/4/2027 5.625 % 10,000 9,876 — 4.250% 2028 Notes 12/6/2028 4.25 % 25,000 24,693 — Total debt $ 445,145 $ 440,427 $ 79,855 (1) The JPM Credit Facility bears interest at LIBOR plus 2.35% on outstanding USD denominated borrowings up to $285,000 and for borrowings above $285,000 , a rate of SOFR plus 2.50% is applied . Total borrowings outstanding and available as of December 31, 2021, were as follows: Maturity Rate Principal Amount Outstanding Amortized Cost Available JPM Credit Facility 11/22/2025 L+2.35 % $ 291,637 $ 288,985 $ 43,363 6.000% 2023 Notes 8/7/2023 6.00 % 30,000 29,717 — 5.375% 2025 Notes 10/20/2025 5.375 % 40,000 39,497 — 5.375% 2026 Notes 12/4/2026 5.375 % 10,000 9,856 — 4.000% 2026 Notes 12/15/2026 4.00 % 75,000 73,404 — 5.625% 2027 Notes 12/4/2027 5.625 % 10,000 9,851 — 4.250% 2028 Notes 12/6/2028 4.25 % 25,000 24,648 — Total debt $ 481,637 $ 475,958 $ 43,363 |
RELATED PARTY TRANSACTIONS (Tab
| RELATED PARTY TRANSACTIONS (Tables) | 12 Months Ended |
| Dec. 31, 2022 | |
| RELATED PARTY TRANSACTIONS | |
| Schedule of management fee expenses | The following table details our management fee expenses for the years ended December 31, 2022, 2021 and 2020: Year ended December 31, Management Fee ($ in thousands) 2022 2021 2020 Base management fee $ 15,600 $ 13,975 $ 12,464 Base management fee waived — — — Total management fees $ 15,600 $ 13,975 $ 12,464 |
| Schedule of performance-based incentive fees | The following table provides a breakdown of the performance-based incentive fees for the years ended December 31, 2022, 2021 and 2020: Year ended December 31, Performance-based Incentive Fee ($ in thousands) 2022 2021 2020 Income incentive fee $ 8,862 $ 7,263 $ 6,114 Capital gains incentive fee (1,803) 261 1,505 Performance-based incentive fees waived — — — Total performance-based incentive fees $ 7,059 $ 7,524 $ 7,619 |
COMMITMENTS AND CONTINGENCIES (
| COMMITMENTS AND CONTINGENCIES (Tables) | 12 Months Ended |
| Dec. 31, 2022 | |
| COMMITMENTS AND CONTINGENCIES | |
| Schedule of unfunded commitments | Unfunded Commitments (1) ($ in thousands) As of December 31, 2022 As of December 31, 2021 Revolving Loan Commitments: ABB/Con-cise Optical Group LLC (d/b/a ABB Optical Group, LLC) $ 113 $ — Bridgepoint Healthcare, LLC 1,588 1,588 Camp Facility Services Holdings, LLC (d/b/a Camp Construction Services, Inc.) — 2,031 Claridge Products and Equipment, LLC 204 491 Coastal Television Broadcasting Group LLC 309 309 EducationDynamics, LLC 1,199 1,199 Epiphany Business Services, LLC (d/b/a Epiphany Dermatology, PA) — 438 Gulf Winds International Acquisition, LLC (d/b/a Gulf Winds International, Inc.) 647 — HC Salon Holdings, Inc. (d/b/a Hair Cuttery) 700 700 HRG Management, LLC (d/b/a HomeRiver Group, LLC) — 1,083 Industrial Specialty Services USA LLC 508 1,182 Inspired Beauty Brands, Inc. 265 531 I&I Sales Group, LLC (d/b/a Avision Sales Group) — 619 ITS Buyer Inc. (d/b/a ITS Logistics, LLC) — 592 IvyRehab Intermediate II, LLC (d/b/a Ivy Rehab) — 403 Juniper Landscaping Holdings LLC — 597 Leviathan Intermediate Holdco, LLC (d/b/a Unleashed Brands Group) 494 — LHS Borrower, LLC (d/b/a Leaf Home, LLC) — 560 LMG Holdings, Inc. — 414 Motivational Marketing, LLC (d/b/a Motivational Fulfillment) 1,024 1,182 MSI Information Services, Inc. 1,050 — Naviga Inc. (f/k/a Newscycle Solutions, Inc.) — 132 PFB Holdco, Inc. (d/b/a PFB Corporation) (1) 899 963 PFB Holdco, Inc. (d/b/a PFB Corporation) 296 296 PG Dental New Jersey Parent, LLC 352 232 Power Service Group CR Acquisition Inc. (d/b/a Power Plant Services) 2,299 3,030 RLJ Pro-Vac, Inc. (d/b/a Pro-Vac) — 1,013 Salon Republic Holdings, LLC (d/b/a Salon Republic, LLC) 603 — Sleep OpCo LLC (d/b/a Brooklyn Bedding LLC) 2,646 2,646 Telestream Holdings Corporation 397 795 The Kyjen Company, LLC (d/b/a Outward Hound) — 554 Trimlite Buyer LLC (d/b/a Trimlite LLC) — 1,473 Total unfunded revolving loan commitments 15,593 25,053 Delayed Draw Loan Commitments: BBQ Buyer, LLC (d/b/a BBQ Guys) — 854 Bridgepoint Healthcare, LLC 794 794 Camp Facility Services Holdings, LLC (d/b/a Camp Construction Services, Inc.) 4,063 4,063 DCA Investment Holding, LLC (d/b/a Dental Care Alliance, LLC) — 1,062 EducationDynamics, LLC 1,709 1,709 Empire Office, Inc. — 4,926 Grupo HIMA San Pablo, Inc. — 667 HRG Management, LLC (d/b/a HomeRiver Group, LLC) 2,167 1,514 I&I Sales Group, LLC (d/b/a Avision Sales Group) — 2,699 IvyRehab Intermediate II, LLC (d/b/a Ivy Rehab) — 1,188 Juniper Landscaping Holdings LLC — 2,387 JZ Capital Partners Ltd. 5,714 — PlayMonster LLC — 2,867 Power Service Group CR Acquisition Inc. (d/b/a Power Plant Services) 2,090 — Salon Republic Holdings, LLC (d/b/a Salon Republic, LLC) 2,097 — Solar Holdings Bidco Limited (1)(2) 4,008 — Source Code Holdings, LLC (d/b/a Source Code Corporation) — 2,185 StoicLane MidCo, LLC (d/b/a StoicLane Inc.) 8,217 — Telestream Holdings Corporation 346 — True Blue Car Wash, LLC 59 1,145 US Methanol Midco LLC (d/b/a US Methanol LLC) 9,333 — Total unfunded delayed draw loan commitments 40,597 28,060 Total Unfunded Commitments $ 56,190 $ 53,113 (1) Unfunded commitments denominated in non-USD currencies have been converted to USD using the exchange rate as of the applicable reporting date. (2) Principal amount is non-USD denominated and is based in British pounds. At the option of the borrower, amounts borrowed under the delayed draw term loan commitment can be US dollars, Canadian dollars or British pounds. |
STOCKHOLDERS' EQUITY (Tables)
| STOCKHOLDERS' EQUITY (Tables) | 12 Months Ended |
| Dec. 31, 2022 | |
| STOCKHOLDERS' EQUITY | |
| Schedule of stockholder's equity | Year ended December 31, ($ in thousands except share and per share amounts) 2022 2021 Shares Issued from Equity Offering — 2,182,300 Shares Issued from ATM Program 16,678 259,682 Shares Issued from DRIP 63,743 174,653 Total Shares Issued 80,421 2,616,635 Proceeds, before offering expenses $ 1,225 $ 41,285 Average Price Per Share (1) $ 15.23 $ 15.78 |
FINANCIAL HIGHLIGHTS (Tables)
| FINANCIAL HIGHLIGHTS (Tables) | 12 Months Ended |
| Dec. 31, 2022 | |
| FINANCIAL HIGHLIGHTS | |
| Schedule of financial highlights | Years Ended December 31, 2022 2021 2020 2019 2018 Per share data: (1) Net asset value, beginning of period $ 15.10 $ 15.23 $ 15.23 $ 15.35 $ 13.98 Investment operations: Net investment income 1.60 1.36 1.18 1.52 1.22 Net realized and unrealized gains(losses) on investments and foreign currency transactions (0.93) 0.07 0.37 (0.02) 1.57 Net increase in net assets resulting from operations 0.67 1.43 1.55 1.50 2.79 Distributions declared from net investment income (1.47) (1.56) (1.55) (1.62) (1.42) Net asset value, end of period $ 14.30 $ 15.10 $ 15.23 $ 15.23 $ 15.35 Total annualized return based on market value (2) (15.81) % 13.89 % (0.66) % 9.72 % (5.22) % Total annualized return based on net asset value 4.55 % 9.21 % 10.36 % 7.70 % 18.66 % Net assets, end of period $ 332,387 $ 349,751 $ 312,897 $ 312,955 $ 315,296 Per share market value at end of period $ 13.05 $ 15.50 $ 13.61 $ 13.70 $ 12.72 Shares outstanding end of period 23,243,088 23,162,667 20,546,032 20,546,032 20,546,032 Ratios/Supplemental Data: (3) Ratio of expenses before incentive fees to average net assets (4) 12.54 % 10.96 % 9.78 % 8.88 % 8.50 % Ratio of incentive fees to average net assets 2.04 % 2.30 % 2.49 % 2.43 % 3.95 % Ratio of total expenses to average net assets (4) 14.58 % 13.26 % 12.27 % 11.31 % 12.45 % Ratio of net investment income to average net assets (4) 10.81 % 8.81 % 7.90 % 9.83 % 8.14 % Portfolio turnover ratio 35.81 % 60.79 % 35.86 % 48.15 % 57.74 % (1) Based on actual number of shares outstanding at the end of the period or the weighted average shares outstanding for the period, unless otherwise noted, as appropriate. (2) Total return is based on the change in market price per share during the period and takes into account distributions, if any, reinvested in accordance with the DRIP. (3) With the exception of the portfolio turnover rate, ratios are reported on an annualized basis. (4) Calculated using total expenses, including income tax provision. |
CHANGE IN NET ASSETS RESULTIN_2
| CHANGE IN NET ASSETS RESULTING FROM OPERATIONS PER COMMON SHARE (Tables) | 12 Months Ended |
| Dec. 31, 2022 | |
| CHANGE IN NET ASSETS RESULTING FROM OPERATIONS PER COMMON SHARE | |
| Schedule of computation of basic and diluted per share net increase in net assets resulting from operations | Year Ended December 31, ($ in thousands except share and per share amounts) 2022 2021 2020 Net increase in net assets resulting from operations $ 15,683 $ 30,094 $ 31,685 Weighted average shares outstanding 23,229,552 21,150,168 20,546,032 Basic and diluted per share net increase in net assets resulting from operations $ 0.68 $ 1.42 $ 1.55 |
INCOME TAXES (Tables)
| INCOME TAXES (Tables) | 12 Months Ended |
| Dec. 31, 2022 | |
| INCOME TAXES | |
| Schedule of reconciliation of net increase in net assets resulting from operations to taxable income | Years ended December 31, ($ in thousands) 2022 2021 2020 Net increase (decrease) in net assets resulting from operations $ 15,683 $ 30,094 $ 31,685 Change in net unrealized (appreciation) depreciation on investments and foreign currency 7,307 7,512 (3,365) Other book-to-tax differences 9,498 451 3,140 Taxable income before deductions for distributions $ 32,488 $ 38,057 $ 31,460 |
| Schedule of tax character of distributions | Years ended December 31, ($ in thousands) 2022 2021 2020 Ordinary income $ 34,150 100.0 % $ 31,953 95.7 % $ 26,420 83.2 % Return of capital — — — — — — Long-term capital gains — — 1,452 4.3 % 5,323 16.8 % Total distributions $ 34,150 100.0 % 33,405 100.0 % $ 31,743 100.0 % |
| Schedule of tax basis components of distributable earnings | December 31, ($ in thousands) 2022 2021 2020 Ordinary income $ 24,217 $ 29,500 $ 24,100 Accumulated capital and other losses — — — Net unrealized (depreciation) appreciation on investments and foreign currency (22,287) (15,910) (11,226) Distributions deferred — — — Total (accumulated deficit) distributable earnings – tax basis $ 1,930 $ 13,590 $ 12,874 |
ORGANIZATION (Details)
| ORGANIZATION (Details) - LIBOR | 12 Months Ended |
| Dec. 31, 2022 | |
| Minimum [Member] | |
| Debt Instrument [Line Items] | |
| Term of interest | 3 years |
| Maximum [Member] | |
| Debt Instrument [Line Items] | |
| Term of interest | 6 years |
SUMMARY OF SIGNIFICANT ACCOUN_3
| SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional information (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 |
| SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES | ||
| Percentage of investment owned | 100% | |
| Unrecognized tax benefits | $ 0 | $ 0 |
| Accrued for interest or penalties | $ 0 | $ 0 |
FORWARD CURRENCY CONTRACTS - Fo
| FORWARD CURRENCY CONTRACTS - Forward Currency Contracts (Details) - USD ($) $ in Thousands | 12 Months Ended | ||
| Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | |
| FORWARD CURRENCY CONTRACTS | |||
| Realized gain (loss) on forward currency contracts | $ (310) | $ 262 | $ 70 |
| Foreign currency forward contracts | |||
| FORWARD CURRENCY CONTRACTS | |||
| Realized gain (loss) on forward currency contracts | (3) | ||
| Unrealized appreciation (depreciation) on forward currency contracts | (3) | ||
| Total net realized and unrealized gains (losses) on forward currency contracts | $ (3) | $ (3) | |
FORWARD CURRENCY CONTRACTS - Un
| FORWARD CURRENCY CONTRACTS - Unrealized Appreciation or Depreciation On Forward Currency Contracts (Details) $ in Thousands | 12 Months Ended |
| Dec. 31, 2022 USD ($) | |
| Fair value | |
| Unrealized depreciation | $ (3) |
| Morgan Stanley | CAD | |
| Fair value | |
| Currency to be sold | 327 |
| Morgan Stanley | USD | |
| Fair value | |
| Currency to be purchased | 241 |
| Morgan Stanley. | |
| Fair value | |
| Unrealized depreciation | $ (3) |
| Morgan Stanley. | GBP | |
| Fair value | |
| Currency to be sold | 59 |
| Morgan Stanley. | USD | |
| Fair value | |
| Currency to be purchased | 69 |
FORWARD CURRENCY CONTRACTS - No
| FORWARD CURRENCY CONTRACTS - Notional Exposure to Foreign Currency Forward Contracts (Details) - USD ($) $ in Thousands | 12 Months Ended | |
| Dec. 31, 2022 | Dec. 31, 2021 | |
| FORWARD CURRENCY CONTRACTS | ||
| Forward currency contracts | $ (3) | |
| Foreign currency forward contracts | ||
| FORWARD CURRENCY CONTRACTS | ||
| Forward currency contracts | $ 208 | $ 5,047 |
FORWARD CURRENCY CONTRACTS - Co
| FORWARD CURRENCY CONTRACTS - Collateral Received or Pledged (Details) $ in Thousands | Dec. 31, 2022 USD ($) |
| FORWARD CURRENCY CONTRACTS | |
| Net Amount of Derivative Liabilities | $ 3 |
| Morgan Stanley | GBP | |
| FORWARD CURRENCY CONTRACTS | |
| Derivative Liabilities Subject to Master Netting Agreement | 3 |
| Net Amount of Derivative Liabilities | 3 |
| Morgan Stanley | Foreign currency forward contracts | |
| FORWARD CURRENCY CONTRACTS | |
| Derivative Liabilities Subject to Master Netting Agreement | 3 |
| Net Amount of Derivative Liabilities | $ 3 |
INVESTMENTS - Schedule of Inves
| INVESTMENTS - Schedule of Investments (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 |
| Investments | ||
| Investments, amortized cost | $ 782,429 | $ 831,960 |
| Investments | 760,228 | 819,208 |
| First lien secured loans | ||
| Investments | ||
| Investments, amortized cost | 631,091 | 709,318 |
| Investments | 618,267 | 697,232 |
| Second lien secured loans | ||
| Investments | ||
| Investments, amortized cost | 24,685 | 25,484 |
| Investments | 20,634 | 23,650 |
| Subordinated Notes | ||
| Investments | ||
| Investments, amortized cost | 167 | 167 |
| Investments | 167 | 167 |
| Subordinated Note to STRS JV | ||
| Investments | ||
| Investments, amortized cost | 80,000 | 60,000 |
| Investments | 80,000 | 60,000 |
| Equity (excluding STRS JV) | ||
| Investments | ||
| Investments, amortized cost | 26,486 | 21,991 |
| Investments | 21,000 | 22,552 |
| Equity in STRS JV | ||
| Investments | ||
| Investments, amortized cost | 20,000 | 15,000 |
| Investments | $ 20,160 | $ 15,607 |
INVESTMENTS - Portfolio by Indu
| INVESTMENTS - Portfolio by Industry Grouping (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 |
| Investments | ||
| Investments | $ 760,228 | $ 819,208 |
| Percent of net assets | 228.75% | 234.24% |
| Advertising | ||
| Investments | ||
| Investments | $ 11,703 | |
| Air Freight & Logistics | ||
| Investments | ||
| Investments | 3,545 | |
| Application Software | ||
| Investments | ||
| Investments | 13,375 | $ 13,518 |
| Building Products | ||
| Investments | ||
| Investments | 14,132 | 16,603 |
| Construction & Engineering | ||
| Investments | ||
| Investments | 8,432 | 13,975 |
| Data Processing & Outsourced Services | ||
| Investments | ||
| Investments | 14,536 | 16,160 |
| Diversified Support Services | ||
| Investments | ||
| Investments | 11,729 | 10,489 |
| Education Services | ||
| Investments | ||
| Investments | $ 12,786 | |
| Percent of net assets | 3.83% | |
| Electronic Equipment & Instruments | ||
| Investments | ||
| Investments | $ 13,187 | 6,687 |
| Environmental & Facilities Services | ||
| Investments | ||
| Investments | 20,708 | 6,872 |
| Household Appliances | ||
| Investments | ||
| Investments | 7,885 | |
| Industrial Machinery | ||
| Investments | ||
| Investments | 14,999 | 6,815 |
| Internet & Direct Marketing Retail | ||
| Investments | ||
| Investments | 19,113 | 15,353 |
| Investment Banking & Brokerage | ||
| Investments | ||
| Investments | 5,545 | 10,054 |
| Leisure Products | ||
| Investments | ||
| Investments | 8,930 | |
| Packaged Foods & Meats | ||
| Investments | ||
| Investments | 12,069 | 25,606 |
| Paper Packaging | ||
| Investments | ||
| Investments | 8,059 | |
| Personal Products | ||
| Investments | ||
| Investments | 3,949 | 4,273 |
| Real Estate Operating Companies | ||
| Investments | ||
| Investments | 11,121 | 4,780 |
| Research & Consulting Services | ||
| Investments | ||
| Investments | 8,686 | 8,901 |
| Specialized Finance | ||
| Investments | ||
| Investments | $ 80,000 | |
| Percent of net assets | 24.07% | |
| Systems Software | ||
| Investments | ||
| Investments | 9,898 | |
| Technology Hardware, Storage & Peripherals | ||
| Investments | ||
| Investments | $ 14,884 | 14,725 |
| Investments Excluding STRS JV's | ||
| Investments | ||
| Investments | $ 660,068 | $ 743,601 |
| Percent of net assets | 100% | 100% |
| Investments Excluding STRS JV's | Advertising | ||
| Investments | ||
| Investments | $ 154 | $ 9,738 |
| Percent of net assets | 1.30% | |
| Investments Excluding STRS JV's | Air Freight & Logistics | ||
| Investments | ||
| Investments | $ 16,107 | $ 21,379 |
| Percent of net assets | 2.40% | 2.90% |
| Investments Excluding STRS JV's | Alternative Carriers | ||
| Investments | ||
| Investments | $ 12,068 | |
| Percent of net assets | 1.80% | |
| Investments Excluding STRS JV's | Application Software | ||
| Investments | ||
| Investments | $ 27,117 | $ 22,590 |
| Percent of net assets | 4.10% | 3% |
| Investments Excluding STRS JV's | Asset Management & Custody Banks | ||
| Investments | ||
| Investments | $ 10,144 | |
| Percent of net assets | 1.50% | |
| Investments Excluding STRS JV's | Automotive Retail | ||
| Investments | ||
| Investments | $ 14,363 | $ 15,286 |
| Percent of net assets | 2.20% | 2.10% |
| Investments Excluding STRS JV's | Broadcasting | ||
| Investments | ||
| Investments | $ 7,780 | $ 8,027 |
| Percent of net assets | 1.20% | 1.10% |
| Investments Excluding STRS JV's | Building Products | ||
| Investments | ||
| Investments | $ 24,362 | $ 44,184 |
| Percent of net assets | 3.70% | 5.90% |
| Investments Excluding STRS JV's | Cable & Satellite | ||
| Investments | ||
| Investments | $ 20,489 | $ 14,526 |
| Percent of net assets | 3.10% | 2% |
| Investments Excluding STRS JV's | Commodity Chemicals | ||
| Investments | ||
| Investments | $ 20,410 | $ 15,172 |
| Percent of net assets | 3.10% | 2% |
| Investments Excluding STRS JV's | Construction & Engineering | ||
| Investments | ||
| Investments | $ 11,086 | |
| Percent of net assets | 1.50% | |
| Investments Excluding STRS JV's | Construction Materials | ||
| Investments | ||
| Investments | $ 7,459 | $ 7,673 |
| Percent of net assets | 1.10% | 1% |
| Investments Excluding STRS JV's | Consumer Finance | ||
| Investments | ||
| Investments | $ 9,628 | |
| Percent of net assets | 1.30% | |
| Investments Excluding STRS JV's | Data Processing & Outsourced Services | ||
| Investments | ||
| Investments | $ 22,817 | $ 32,864 |
| Percent of net assets | 3.50% | 4.40% |
| Investments Excluding STRS JV's | Department Stores | ||
| Investments | ||
| Investments | $ 13,538 | |
| Percent of net assets | 1.80% | |
| Investments Excluding STRS JV's | Distributors | ||
| Investments | ||
| Investments | $ 4,171 | $ 4,025 |
| Percent of net assets | 0.60% | 0.50% |
| Investments Excluding STRS JV's | Diversified Chemicals | ||
| Investments | ||
| Investments | $ 13,268 | $ 18,360 |
| Percent of net assets | 2% | 2.50% |
| Investments Excluding STRS JV's | Diversified Support Services | ||
| Investments | ||
| Investments | $ 11,035 | $ 11,618 |
| Percent of net assets | 1.70% | 1.60% |
| Investments Excluding STRS JV's | Education Services | ||
| Investments | ||
| Investments | $ 12,869 | $ 13,398 |
| Percent of net assets | 1.90% | 1.80% |
| Investments Excluding STRS JV's | Electric Utilities | ||
| Investments | ||
| Investments | $ 10,411 | $ 10,296 |
| Percent of net assets | 1.70% | 1.40% |
| Investments Excluding STRS JV's | Electronic Equipment & Instruments | ||
| Investments | ||
| Investments | $ 6,687 | |
| Percent of net assets | 0.90% | |
| Investments Excluding STRS JV's | Environmental & Facilities Services | ||
| Investments | ||
| Investments | $ 18,459 | $ 32,998 |
| Percent of net assets | 2.80% | 4.40% |
| Investments Excluding STRS JV's | Health Care Facilities | ||
| Investments | ||
| Investments | $ 10,131 | $ 25,576 |
| Percent of net assets | 1.50% | 3.40% |
| Investments Excluding STRS JV's | Health Care Services | ||
| Investments | ||
| Investments | $ 23,333 | $ 58,055 |
| Percent of net assets | 3.50% | 7.80% |
| Investments Excluding STRS JV's | Health Care Supplies | ||
| Investments | ||
| Investments | $ 23,090 | |
| Percent of net assets | 3.50% | |
| Investments Excluding STRS JV's | Heavy Electrical Equipment | ||
| Investments | ||
| Investments | $ 14,520 | $ 11,088 |
| Percent of net assets | 2.20% | 1.50% |
| Investments Excluding STRS JV's | Home Furnishings | ||
| Investments | ||
| Investments | $ 24,780 | $ 24,017 |
| Percent of net assets | 3.80% | 3.20% |
| Investments Excluding STRS JV's | Household Appliances | ||
| Investments | ||
| Investments | $ 6,615 | |
| Percent of net assets | 1% | |
| Investments Excluding STRS JV's | Household Products | ||
| Investments | ||
| Investments | $ 11,153 | $ 11,773 |
| Percent of net assets | 1.70% | 1.60% |
| Investments Excluding STRS JV's | Industrial Machinery | ||
| Investments | ||
| Investments | $ 9,874 | |
| Percent of net assets | 1.50% | |
| Investments Excluding STRS JV's | Interactive Media & Services | ||
| Investments | ||
| Investments | $ 9,488 | $ 20,157 |
| Percent of net assets | 1.40% | 2.70% |
| Investments Excluding STRS JV's | Internet & Direct Marketing Retail | ||
| Investments | ||
| Investments | $ 37,191 | $ 45,668 |
| Percent of net assets | 5.60% | 6.10% |
| Investments Excluding STRS JV's | Investment Banking & Brokerage | ||
| Investments | ||
| Investments | $ 18,240 | $ 19,603 |
| Percent of net assets | 2.80% | 2.60% |
| Investments Excluding STRS JV's | IT Consulting & Other Services | ||
| Investments | ||
| Investments | $ 15,408 | $ 19,162 |
| Percent of net assets | 2.30% | 2.60% |
| Investments Excluding STRS JV's | Leisure Facilities | ||
| Investments | ||
| Investments | $ 21,979 | $ 22,142 |
| Percent of net assets | 3.30% | 3% |
| Investments Excluding STRS JV's | Leisure Products | ||
| Investments | ||
| Investments | $ 13,366 | $ 3,072 |
| Percent of net assets | 2% | 0.40% |
| Investments Excluding STRS JV's | Life Sciences Tools & Services | ||
| Investments | ||
| Investments | $ 4,824 | $ 4,925 |
| Percent of net assets | 0.80% | 0.70% |
| Investments Excluding STRS JV's | Office Services & Supplies | ||
| Investments | ||
| Investments | $ 25,832 | $ 20,921 |
| Percent of net assets | 3.90% | 2.80% |
| Investments Excluding STRS JV's | Other Diversified Financial Services | ||
| Investments | ||
| Investments | $ 3,788 | $ 3,492 |
| Percent of net assets | 0.70% | 0.50% |
| Investments Excluding STRS JV's | Packaged Foods & Meats | ||
| Investments | ||
| Investments | $ 10,941 | $ 10,862 |
| Percent of net assets | 1.70% | 1.50% |
| Investments Excluding STRS JV's | Paper Packaging | ||
| Investments | ||
| Investments | $ 283 | |
| Percent of net assets | 0.10% | |
| Investments Excluding STRS JV's | Personal Products | ||
| Investments | ||
| Investments | $ 13,482 | $ 12,260 |
| Percent of net assets | 2% | 1.60% |
| Investments Excluding STRS JV's | Real Estate Development | ||
| Investments | ||
| Investments | $ 8,103 | |
| Percent of net assets | 1.20% | |
| Investments Excluding STRS JV's | Real Estate Operating Companies | ||
| Investments | ||
| Investments | $ 5,909 | $ 5,431 |
| Percent of net assets | 0.90% | 0.70% |
| Investments Excluding STRS JV's | Research & Consulting Services | ||
| Investments | ||
| Investments | $ 21,896 | $ 23,822 |
| Percent of net assets | 3.30% | 3.20% |
| Investments Excluding STRS JV's | Specialized Consumer Services | ||
| Investments | ||
| Investments | $ 37,819 | $ 36,225 |
| Percent of net assets | 5.70% | 4.90% |
| Investments Excluding STRS JV's | Systems Software | ||
| Investments | ||
| Investments | $ 17,847 | $ 19,160 |
| Percent of net assets | 2.70% | 2.60% |
| Investments Excluding STRS JV's | Technology Hardware, Storage & Peripherals | ||
| Investments | ||
| Investments | $ 16,693 | $ 23,117 |
| Percent of net assets | 2.50% | 3.10% |
INVESTMENTS - Affiliated and Co
| INVESTMENTS - Affiliated and Controlled Persons (Details) - USD ($) $ in Thousands | 12 Months Ended | ||||
| Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Jun. 24, 2022 | Jan. 24, 2022 | |
| Investments in and Advances to Affiliates [Line Items] | |||||
| Weighted average remaining term of debt investments | 3 years 4 months 24 days | 3 years 9 months 18 days | |||
| Fair value of non-accrual loans | $ 0 | $ 10,046 | |||
| Cost of investment | 782,429 | 831,960 | |||
| Realized investment gain | (13,958) | 8,556 | $ 4,118 | ||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Beginning Fair Value | 819,208 | ||||
| Net Change in Unrealized Appreciation (Depreciation) | (9,191) | (7,606) | 3,343 | ||
| Ending Fair Value | 760,228 | 819,208 | |||
| PlayMonster LLC | First Lien Secured Term Loan and First Lien Secured Delayed Draw Loan [Member] | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 7,045 | ||||
| PlayMonster LLC | First Lien Revolving Loan Investment [Member] | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 437 | ||||
| Non-controlled affiliate company investments | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Realized investment gain | 1,725 | 562 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Dividends and interest included in income | 660 | 1,190 | |||
| Beginning Fair Value | 6,874 | 15,717 | |||
| Purchases | 8,986 | ||||
| Sales | (1,088) | (10,000) | |||
| Net Change in Unrealized Appreciation (Depreciation) | (5,239) | 1,187 | (878) | ||
| Ending Fair Value | 9,533 | 6,874 | 15,717 | ||
| Controlled affiliate company investments | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Dividends and interest included in income | 13,362 | 8,214 | |||
| Beginning Fair Value | 75,607 | 51,240 | |||
| Purchases | 25,000 | 23,659 | |||
| Net Change in Unrealized Appreciation (Depreciation) | (447) | 708 | (464) | ||
| Ending Fair Value | 100,160 | 75,607 | 51,240 | ||
| Investment, Identifier [Axis]: ABB/Con-cise Optical Group LLC First Lien Secured Revolving Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 2,105 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:ABBCon-ciseOpticalGroupLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ 2,093 | ||||
| Investment, Identifier [Axis]: ABB/Con-cise Optical Group LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 21,110 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:ABBCon-ciseOpticalGroupLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 20,997 | ||||
| Investment, Identifier [Axis]: ALM Media, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 13,286 | $ 14,011 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:ALMMediaLLCMember | whf:ALMMediaLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 13,996 | ||||
| Ending Fair Value | 13,255 | $ 13,996 | |||
| Investment, Identifier [Axis]: AST Applications Software Technology LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 3,943 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:ASTApplicationsSoftwareTechnologyLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 3,958 | ||||
| Ending Fair Value | $ 3,958 | ||||
| Investment, Identifier [Axis]: ATSG Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 13,620 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:ATSGIncMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 13,487 | ||||
| Investment, Identifier [Axis]: ATSG, First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 13,736 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:ATSGIncMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 13,736 | ||||
| Ending Fair Value | $ 13,736 | ||||
| Investment, Identifier [Axis]: Access USA Shipping, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 4,906 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:AccessUSAShippingLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 4,937 | ||||
| Ending Fair Value | $ 4,937 | ||||
| Investment, Identifier [Axis]: Aeyon LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 8,764 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:AeyonLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 8,641 | ||||
| Investment, Identifier [Axis]: American Crafts Holdings, LLC, Warrants | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:AmericanCraftsLCMember | ||||
| Investment type | Warrant | ||||
| Investment, Identifier [Axis]: American Crafts, LC First Lien Secured Delayed Draw Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 1,346 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:AmericanCraftsLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Ending Fair Value | $ 1,147 | ||||
| Investment, Identifier [Axis]: American Crafts, LC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 9,473 | $ 8,325 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:AmericanCraftsLCMember | whf:AmericanCraftsLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 8,325 | ||||
| Ending Fair Value | 8,244 | $ 8,325 | |||
| Investment, Identifier [Axis]: Arcole Holding Corporation Shares | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 6,944 | $ 6,944 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:ArcoleHoldingCorporationMember | whf:ArcoleHoldingCorporationMember | |||
| Investment type | Common Stock | Common Stock | |||
| Dividends and interest included in income | $ 321 | ||||
| Beginning Fair Value | 6,874 | ||||
| Net Change in Unrealized Appreciation (Depreciation) | (494) | ||||
| Ending Fair Value | 6,380 | $ 6,874 | |||
| Investment, Identifier [Axis]: Arcole Holding Corporation, Equity | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:ArcoleHoldingCorporationMember | ||||
| Investment type | Equity (excluding STRS JV) | ||||
| Dividends and interest included in income | $ 897 | ||||
| Beginning Fair Value | 6,874 | 6,448 | |||
| Net Change in Unrealized Appreciation (Depreciation) | 426 | ||||
| Ending Fair Value | 6,874 | 6,448 | |||
| Investment, Identifier [Axis]: Arcstor Midco, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 19,353 | $ 19,018 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:ArcstorMidcoLLCMember | whf:ArcstorMidcoLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 19,160 | ||||
| Ending Fair Value | 17,847 | $ 19,160 | |||
| Investment, Identifier [Axis]: Atlas Purchaser, Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 2,611 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:AtlasPurchaserIncMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 2,556 | ||||
| Investment, Identifier [Axis]: Atlas Purchaser, Inc Second Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 14,642 | $ 14,586 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:AtlasPurchaserIncMember | whf:AtlasPurchaserIncMember | |||
| Investment type | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 14,700 | ||||
| Ending Fair Value | 11,969 | $ 14,700 | |||
| Investment, Identifier [Axis]: Avision Holdings, LLC Class A LLC Interests | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 258 | $ 250 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:AvisionHoldingsLLCMember | Telestream Holdings Corporation | |||
| Investment type | whf:ClassALLCInterestsMember | whf:ClassALLCInterestsMember | |||
| Beginning Fair Value | $ 250 | ||||
| Ending Fair Value | 154 | $ 250 | |||
| Investment, Identifier [Axis]: BBQ Buyer, LLC First Lien Secured Delayed Draw Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 2,557 | $ 2,523 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:BBQBuyerLLCMember | whf:BBQBuyerLLCMember | |||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||
| Beginning Fair Value | $ 2,523 | ||||
| Ending Fair Value | 2,541 | $ 2,523 | |||
| Investment, Identifier [Axis]: BBQ Buyer, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 12,550 | $ 12,388 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:BBQBuyerLLCMember | whf:BBQBuyerLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 12,623 | ||||
| Ending Fair Value | 12,465 | $ 12,623 | |||
| Investment, Identifier [Axis]: BBQ Buyer, LLC Shares | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 1,100 | $ 1,100 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:BBQBuyerLLCMember | whf:BBQBuyerLLCMember | |||
| Investment type | Common Stock | Common Stock | |||
| Beginning Fair Value | $ 2,442 | ||||
| Ending Fair Value | 1,404 | $ 2,442 | |||
| Investment, Identifier [Axis]: BL Products Parent, LP Class A Units | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 667 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:BLProductsParentLPMember | ||||
| Investment type | whf:ClassAUnitsMember | ||||
| Ending Fair Value | $ 514 | ||||
| Investment, Identifier [Axis]: BLP Buyer, Inc. First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 2,098 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:BLProductsParentLPMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 2,091 | ||||
| Investment, Identifier [Axis]: BLP Buyer., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF plus 6.25%, Rate 10.67%, Due 2/1/28 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 270 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SmaltoInc.Member | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ 259 | ||||
| Investment, Identifier [Axis]: BLP Buyer., First Lien Secured Term Loan, Floor 1.25%, Spread SF plus 6.25%, Rate 10.49%, Due 2/1/27 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 8,054 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SmaltoInc.Member | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 7,939 | ||||
| Investment, Identifier [Axis]: BPII-JL Group Holdings LP Class A Units | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 825 | $ 825 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:BPII-JLGroupHoldingsLPMember | whf:BPII-JLGroupHoldingsLPMember | |||
| Investment type | whf:ClassAUnitsMember | whf:ClassAUnitsMember | |||
| Beginning Fair Value | $ 825 | ||||
| Ending Fair Value | $ 600 | $ 825 | |||
| Investment, Identifier [Axis]: Bridgepoint Healthcare, LLC First Lien Secured Delayed Draw Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:BridgepointHealthcareLLCMember | whf:BridgepointHealthcareLLCMember | |||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||
| Ending Fair Value | $ (14) | ||||
| Investment, Identifier [Axis]: Bridgepoint Healthcare, LLC First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:BridgepointHealthcareLLCMember | whf:BridgepointHealthcareLLCMember | |||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||
| Ending Fair Value | $ (16) | ||||
| Investment, Identifier [Axis]: Bridgepoint Healthcare, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 10,266 | $ 10,770 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:BridgepointHealthcareLLCMember | whf:BridgepointHealthcareLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 10,769 | ||||
| Ending Fair Value | 10,161 | $ 10,769 | |||
| Investment, Identifier [Axis]: Bulk Midco, LLC First Lien Secured Revolving Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 1,963 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:BulkMidcoLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ 1,964 | ||||
| Investment, Identifier [Axis]: Bulk Midco, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 19,126 | $ 14,936 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:BulkMidcoLLCMember | whf:BulkMidcoLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 14,526 | ||||
| Ending Fair Value | 18,525 | $ 14,526 | |||
| Investment, Identifier [Axis]: CHS Therapy, LLC First Lien Secured Term Loan A | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 7,175 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CHSTherapyLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanAMember | ||||
| Beginning Fair Value | 7,242 | ||||
| Ending Fair Value | $ 7,242 | ||||
| Investment, Identifier [Axis]: CHS Therapy, LLC First Lien Secured Term Loan C | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 879 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CHSTherapyLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanCMember | ||||
| Beginning Fair Value | 891 | ||||
| Ending Fair Value | $ 891 | ||||
| Investment, Identifier [Axis]: CX Holdco LLC Common Units | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 1,116 | $ 972 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CXHoldcoLLCMember | whf:CXHoldcoLLCMember | |||
| Investment type | whf:CommonUnitsMember | whf:CommonUnitsMember | |||
| Beginning Fair Value | $ 972 | ||||
| Ending Fair Value | $ 1,558 | $ 972 | |||
| Investment, Identifier [Axis]: Camp Facility Services Holdings, LLC First Lien Secured Delayed Draw Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CampFacilityServicesHoldingsLLCMember | whf:CampFacilityServicesHoldingsLLCMember | |||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||
| Beginning Fair Value | $ (1) | ||||
| Ending Fair Value | (96) | $ (1) | |||
| Investment, Identifier [Axis]: Camp Facility Services Holdings, LLC First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CampFacilityServicesHoldingsLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Investment, Identifier [Axis]: Camp Facility Services Holdings, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 11,606 | $ 12,745 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CampFacilityServicesHoldingsLLCMember | whf:CampFacilityServicesHoldingsLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 12,742 | ||||
| Ending Fair Value | 11,326 | $ 12,742 | |||
| Investment, Identifier [Axis]: Camp Facility Services Parent, LLC Preferred Units | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 840 | $ 840 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CampFacilityServicesParentLLCMember | whf:CampFacilityServicesParentLLCMember | |||
| Investment type | whf:PreferredUnitsMember | whf:PreferredUnitsMember | |||
| Beginning Fair Value | $ 840 | ||||
| Ending Fair Value | 927 | $ 840 | |||
| Investment, Identifier [Axis]: Cennox Holdings Limited, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 5/4/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 3,889 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CennoxHoldingsLimitedMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 3,877 | ||||
| Ending Fair Value | $ 3,877 | ||||
| Investment, Identifier [Axis]: Cennox Holdings Limited, First lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 5/4/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 1,173 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CennoxHoldingsLimitedMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | $ 1,169 | ||||
| Ending Fair Value | $ 1,169 | ||||
| Investment, Identifier [Axis]: Cennox Holdings Limited., First lien Secured Revolving Loan, Base Rate Floor 1.00%, Spread Rate plus 5.17%, Rate 12.10%, Due 5/4/26 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CennoxHoldingsLimitedMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ (161) | ||||
| Investment, Identifier [Axis]: Cennox Holdings Limited., First lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 10.02%, Due 5/4/26 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 3,863 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CennoxHoldingsLimitedMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 3,343 | ||||
| Investment, Identifier [Axis]: Cennox Holdings Limited., First lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 10.99%, Due 5/4/26 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 9,834 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CennoxHoldingsLimitedMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 9,926 | ||||
| Investment, Identifier [Axis]: Cennox, Inc., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 5/4/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 8,755 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CennoxInc.Member | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Beginning Fair Value | 8,915 | ||||
| Ending Fair Value | $ 8,915 | ||||
| Investment, Identifier [Axis]: Cennox, Inc., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 5/4/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 551 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CennoxInc.Member | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 569 | ||||
| Ending Fair Value | $ 569 | ||||
| Investment, Identifier [Axis]: Cennox, Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 5/4/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 8,365 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CennoxInc.Member | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 8,438 | ||||
| Ending Fair Value | $ 8,438 | ||||
| Investment, Identifier [Axis]: Claridge Products and Equipment, LLC First Lien Secured Revolving Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 772 | $ 207 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:ClaridgeProductsandEquipmentLLCMember | whf:ClaridgeProductsandEquipmentLLCMember | |||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||
| Beginning Fair Value | $ 204 | ||||
| Ending Fair Value | 732 | $ 204 | |||
| Investment, Identifier [Axis]: Claridge Products and Equipment, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 6,994 | $ 7,518 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:ClaridgeProductsandEquipmentLLCMember | whf:ClaridgeProductsandEquipmentLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 7,469 | ||||
| Ending Fair Value | 6,727 | $ 7,469 | |||
| Investment, Identifier [Axis]: CleanChoice Energy, Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 10,341 | $ 10,299 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CleanChoiceEnergyIncMember | whf:CleanChoiceEnergyIncMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 10,296 | ||||
| Ending Fair Value | $ 10,411 | $ 10,296 | |||
| Investment, Identifier [Axis]: Coastal Television Broadcasting Group LLC First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CoastalTelevisionBroadcastingGroupLLCMember | whf:CoastalTelevisionBroadcastingGroupLLCMember | |||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||
| Ending Fair Value | $ (5) | ||||
| Investment, Identifier [Axis]: Coastal Television Broadcasting Group LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 7,908 | $ 8,027 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CoastalTelevisionBroadcastingGroupLLCMember | whf:CoastalTelevisionBroadcastingGroupLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 8,027 | ||||
| Ending Fair Value | 7,785 | $ 8,027 | |||
| Investment, Identifier [Axis]: Crown Brands LLC Second Lien Secured Delayed Draw Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 650 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CrownBrandsLLCMember | ||||
| Investment type | whf:SecondLienSecuredDelayedDrawLoanMember | ||||
| Beginning Fair Value | 520 | ||||
| Ending Fair Value | $ 520 | ||||
| Investment, Identifier [Axis]: Crown Brands LLC Second Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 4,299 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:CrownBrandsLLCMember | ||||
| Investment type | whf:SecondLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 3,505 | ||||
| Ending Fair Value | $ 3,505 | ||||
| Investment, Identifier [Axis]: DCA Investment Holding, LLC First Lien Secured Delayed Draw Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 672 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:DCAInvestmentHoldingLLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Beginning Fair Value | 688 | ||||
| Ending Fair Value | $ 688 | ||||
| Investment, Identifier [Axis]: DCA Investment Holding, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 6,933 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:DCAInvestmentHoldingLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 6,988 | ||||
| Ending Fair Value | $ 6,988 | ||||
| Investment, Identifier [Axis]: Drew Foam Companies Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 7,094 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:DrewFoamCompaniesIncMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 7,183 | ||||
| Ending Fair Value | $ 7,183 | ||||
| Investment, Identifier [Axis]: Drew Foam Companies Inc First Lien Secured Term Loan Due 11/5/2025 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 14,105 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:DrewFoamCompaniesIncMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 14,132 | ||||
| Investment, Identifier [Axis]: Drew Foam Companies Inc, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 11/5/2025 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 7,096 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:DrewFoamCompaniesIncMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 7,183 | ||||
| Ending Fair Value | $ 7,183 | ||||
| Investment, Identifier [Axis]: E-Phoenix Acquisition Co. Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 5.50%, Rate 10.23%, Due 6/23/27 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 8,782 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:E-PhoenixAcquisitionCo.Inc.Member | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 8,686 | ||||
| Investment, Identifier [Axis]: E-Phoenix Acquisition Co. Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 5.75%, Rate 6.75%, Due 6/23/2027 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 8,852 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:E-PhoenixAcquisitionCo.Inc.Member | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 8,901 | ||||
| Ending Fair Value | $ 8,901 | ||||
| Investment, Identifier [Axis]: Eddy Acquisitions, LLC Preferred Units | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 167 | $ 167 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:EddyAcquisitionsLLCMember | whf:EddyAcquisitionsLLCMember | |||
| Investment type | us-gaap:PreferredStockMember | whf:PreferredUnitsMember | |||
| Beginning Fair Value | $ 167 | ||||
| Ending Fair Value | 83 | $ 167 | |||
| Investment, Identifier [Axis]: Education Networks of America, Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 4,511 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:EducationNetworksofAmericaIncMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | $ 4,508 | ||||
| Ending Fair Value | $ 4,508 | ||||
| Investment, Identifier [Axis]: EducationDynamics, LLC First Lien Secured Delayed Draw Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:EducationDynamicsLLCMember | whf:EducationDynamicsLLCMember | |||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||
| Ending Fair Value | $ (26) | ||||
| Investment, Identifier [Axis]: EducationDynamics, LLC First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:EducationDynamicsLLCMember | whf:EducationDynamicsLLCMember | |||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||
| Ending Fair Value | $ (18) | ||||
| Investment, Identifier [Axis]: EducationDynamics, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 12,861 | $ 13,068 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:EducationDynamicsLLCMember | whf:EducationDynamicsLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 13,064 | ||||
| Ending Fair Value | 12,663 | $ 13,064 | |||
| Investment, Identifier [Axis]: EducationDynamics, LLC Subordinated Unsecured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 167 | $ 167 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:EducationDynamicsLLCMember | whf:EducationDynamicsLLCMember | |||
| Investment type | whf:SubordinatedUnsecuredTermLoanMember | whf:SubordinatedUnsecuredTermLoanMember | |||
| Beginning Fair Value | $ 167 | ||||
| Ending Fair Value | 167 | $ 167 | |||
| Investment, Identifier [Axis]: Empire Office, Inc First Lien Secured Delayed Draw Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 4,746 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:EmpireOfficeIncMember | whf:EmpireOfficeIncMember | |||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||
| Beginning Fair Value | $ 7 | ||||
| Ending Fair Value | 4,754 | $ 7 | |||
| Investment, Identifier [Axis]: Empire Office, Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 11,728 | $ 12,507 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:EmpireOfficeIncMember | whf:EmpireOfficeIncMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 12,589 | ||||
| Ending Fair Value | 11,687 | $ 12,589 | |||
| Investment, Identifier [Axis]: Epiphany Business Services, LLC First Lien Secured Delayed Draw Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 3,008 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:EpiphanyBusinessServicesLLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Beginning Fair Value | 3,027 | ||||
| Ending Fair Value | $ 3,027 | ||||
| Investment, Identifier [Axis]: Epiphany Business Services, LLC First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:EpiphanyBusinessServicesLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 3 | ||||
| Ending Fair Value | $ 3 | ||||
| Investment, Identifier [Axis]: Epiphany Business Services, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 4,214 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:EpiphanyBusinessServicesLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 4,235 | ||||
| Ending Fair Value | $ 4,235 | ||||
| Investment, Identifier [Axis]: Escalon Services Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 7,490 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:EscalonServicesIncMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 8,046 | ||||
| Ending Fair Value | $ 8,046 | ||||
| Investment, Identifier [Axis]: Escalon Services Inc Warrants | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 476 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:EscalonServicesIncMember | ||||
| Investment type | Warrant | ||||
| Beginning Fair Value | 893 | ||||
| Ending Fair Value | $ 893 | ||||
| Investment, Identifier [Axis]: FGI Acquisition Corp. (d/b/a Flexitallic Group SAS) First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 15,794 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:FgiAcquisitionCorpMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 15,859 | ||||
| Investment, Identifier [Axis]: FR Flow Control CB LLC, First Lien Secured Term Loan B, Floor 1.00%, Spread L plus 5.50%, Rate 6.50%, Due 6/28/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 6,727 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:FRFlowControlCBLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanBMember | ||||
| Beginning Fair Value | 6,815 | ||||
| Ending Fair Value | $ 6,815 | ||||
| Investment, Identifier [Axis]: Flexitallic Group SAS First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 15,047 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:FlexitallicGroupSASMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 15,172 | ||||
| Ending Fair Value | $ 15,172 | ||||
| Investment, Identifier [Axis]: Foodservices Brand Group, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 357 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:FoodservicesBrandGroupLlcMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 330 | ||||
| Investment, Identifier [Axis]: Foodservices Brand Group, LLC Second Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 5,108 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:FoodservicesBrandGroupLlcMember | ||||
| Investment type | whf:SecondLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 3,841 | ||||
| Investment, Identifier [Axis]: Future Payment Technologies, LP First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 22,776 | $ 23,811 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:FuturePaymentTechnologiesLPMember | whf:FuturePaymentTechnologiesLPMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 23,925 | ||||
| Ending Fair Value | $ 22,817 | $ 23,925 | |||
| Investment, Identifier [Axis]: Geo Logic Systems Ltd First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:GeoLogicSystemsLtdMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ (9) | ||||
| Investment, Identifier [Axis]: Geo Logic Systems Ltd First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 15,413 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:GeoLogicSystemsLtdMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 14,545 | ||||
| Investment, Identifier [Axis]: Geo Logic Systems Ltd., First Lien Secured Revolving Loan, Floor 1.00%, Spread C plus 6.50%, Rate 7.50%, Due 12/19/2024 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:GeoLogicSystemsLtdMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 4 | ||||
| Ending Fair Value | $ 4 | ||||
| Investment, Identifier [Axis]: Geo Logic Systems Ltd., First Lien Secured Term Loan, Floor 1.00%, Spread C plus 6.50%, Rate 7.50%, Due 12/19/2024 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 15,766 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:GeoLogicSystemsLtdMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 16,156 | ||||
| Ending Fair Value | $ 16,156 | ||||
| Investment, Identifier [Axis]: Grupo HIMA San Pablo, Inc Amended Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 1,704 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:GrupoHIMASanPabloIncMember | ||||
| Investment type | whf:AmendedTermLoanMember | ||||
| Beginning Fair Value | 1,708 | ||||
| Ending Fair Value | $ 1,708 | ||||
| Investment, Identifier [Axis]: Grupo HIMA San Pablo, Inc First Lien Secured Term Loan A | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 3,476 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:GrupoHIMASanPabloIncMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanAMember | ||||
| Beginning Fair Value | 1,169 | ||||
| Ending Fair Value | $ 1,169 | ||||
| Investment, Identifier [Axis]: Grupo HIMA San Pablo, Inc First Lien Secured Term Loan B | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 12,185 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:GrupoHIMASanPabloIncMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanBMember | ||||
| Beginning Fair Value | 4,097 | ||||
| Ending Fair Value | $ 4,097 | ||||
| Investment, Identifier [Axis]: Grupo HIMA San Pablo, Inc Second Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 1,024 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:GrupoHIMASanPabloIncMember | ||||
| Investment type | whf:SecondLienSecuredTermLoanMember | ||||
| Investment, Identifier [Axis]: Grupo HIMA San Pablo, Inc Superpriority Delayed Draw Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 568 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:GrupoHIMASanPabloIncMember | ||||
| Investment type | whf:SuperpriorityDelayedDrawLoanMember | ||||
| Beginning Fair Value | $ 568 | ||||
| Ending Fair Value | $ 568 | ||||
| Investment, Identifier [Axis]: Gulf Winds International Acquisition, LLC (d/b/a Gulf Winds International, Inc.) First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:GulfWindsInternationalAcquisitionLlcMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Investment, Identifier [Axis]: Gulf Winds International Acquisition, LLC (d/b/a Gulf Winds International, Inc.) First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 4,708 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:GulfWindsInternationalAcquisitionLlcMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 4,708 | ||||
| Investment, Identifier [Axis]: HC Salon Holdings, Inc First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:HCSalonHoldingsIncMember | whf:HCSalonHoldingsIncMember | |||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||
| Ending Fair Value | $ 10 | ||||
| Investment, Identifier [Axis]: HC Salon Holdings, Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 11,348 | $ 11,417 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:HCSalonHoldingsIncMember | whf:HCSalonHoldingsIncMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 11,416 | ||||
| Ending Fair Value | $ 11,521 | $ 11,416 | |||
| Investment, Identifier [Axis]: HRG Management, LLC First Lien Secured Delayed Draw Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 644 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:HRGManagementLLCMember | HRG Management, LLC (d/b/a HomeRiver Group, LLC) | |||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||
| Beginning Fair Value | $ 651 | ||||
| Ending Fair Value | $ 651 | ||||
| Investment, Identifier [Axis]: HRG Management, LLC First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | HRG Management, LLC (d/b/a HomeRiver Group, LLC) | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Investment, Identifier [Axis]: HRG Management, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 4,781 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | HRG Management, LLC (d/b/a HomeRiver Group, LLC) | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 4,780 | ||||
| Ending Fair Value | $ 4,780 | ||||
| Investment, Identifier [Axis]: HRG Management, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 7.25%, Due 10/19/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 4,781 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:HRGManagementLLCMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 4,780 | ||||
| Ending Fair Value | $ 4,780 | ||||
| Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Delayed Draw Loan, Floor 1.00% Base Rate Plus, 6.12%, Rate 10.90%, Due 10/19/26 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 1,741 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:HRGManagementLLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Ending Fair Value | $ 1,720 | ||||
| Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate 10.48%, Due 10/19/26 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:HRGManagementLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ (11) | ||||
| Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate 10.48%, Due 10/19/26 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 9,505 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:HRGManagementLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 9,412 | ||||
| Investment, Identifier [Axis]: Hollander Intermediate LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 4,821 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:HollanderIntermediateLlcMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 4,609 | ||||
| Investment, Identifier [Axis]: Honors Holdings, LLC First Lien Secured Delayed Draw Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 4,621 | $ 4,611 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:HonorsHoldingsLLCMember | whf:HonorsHoldingsLLCMember | |||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||
| Beginning Fair Value | $ 4,578 | ||||
| Ending Fair Value | 4,557 | $ 4,578 | |||
| Investment, Identifier [Axis]: Honors Holdings, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 9,344 | $ 9,315 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:HonorsHoldingsLLCMember | whf:HonorsHoldingsLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 9,296 | ||||
| Ending Fair Value | 9,254 | $ 9,296 | |||
| Investment, Identifier [Axis]: I And I Sales Group, LLC First Lien Secured Delayed Draw Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 388 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:IAndISalesGroupLLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Beginning Fair Value | 388 | ||||
| Ending Fair Value | $ 388 | ||||
| Investment, Identifier [Axis]: I And I Sales Group, LLC First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:IAndISalesGroupLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Investment, Identifier [Axis]: I And I Sales Group, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 9,102 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:IAndISalesGroupLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 9,100 | ||||
| Ending Fair Value | $ 9,100 | ||||
| Investment, Identifier [Axis]: I&I Sales Group, LLC First Lien Secured Delayed Draw Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 2,713 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:IAndISalesGroupLLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Ending Fair Value | $ 2,699 | ||||
| Investment, Identifier [Axis]: I&I Sales Group, LLC First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:IAndISalesGroupLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ (3) | ||||
| Investment, Identifier [Axis]: I&I Sales Group, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 9,047 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:IAndISalesGroupLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 9,007 | ||||
| Investment, Identifier [Axis]: IDIG Parent, LLC, First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/15/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 1,397 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:IDIGParentLLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Beginning Fair Value | 1,411 | ||||
| Ending Fair Value | $ 1,411 | ||||
| Investment, Identifier [Axis]: IDIG Parent, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/15/2026 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:IDIGParentLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 5 | ||||
| Ending Fair Value | $ 5 | ||||
| Investment, Identifier [Axis]: IDIG Parent, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/15/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 8,404 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:IDIGParentLLCMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 8,482 | ||||
| Ending Fair Value | $ 8,482 | ||||
| Investment, Identifier [Axis]: ITS Buyer Inc First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:ITSBuyerIncMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Investment, Identifier [Axis]: ITS Buyer Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 3,540 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:ITSBuyerIncMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | $ 3,539 | ||||
| Ending Fair Value | $ 3,539 | ||||
| Investment, Identifier [Axis]: ITS Buyer Inc. First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:ITSBuyerIncMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ 3 | ||||
| Investment, Identifier [Axis]: ITS Buyer Inc. First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 3,523 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:ITSBuyerIncMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 3,542 | ||||
| Investment, Identifier [Axis]: ImageOne Industries, LLC Common A Units | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 4 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:ImageOneIndustriesLLCMember | whf:ImageOneIndustriesLLCMember | |||
| Investment type | whf:CommonAUnitsMember | whf:CommonAUnitsMember | |||
| Beginning Fair Value | $ 158 | ||||
| Ending Fair Value | 92 | $ 158 | |||
| Investment, Identifier [Axis]: Industrial Specialty Services USA LLC First Lien Secured Revolving Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 663 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:IndustrialSpecialtyServicesUSALLCMember | whf:IndustrialSpecialtyServicesUSALLCMember | |||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||
| Ending Fair Value | $ 649 | ||||
| Investment, Identifier [Axis]: Industrial Specialty Services USA LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 11,697 | $ 11,767 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:IndustrialSpecialtyServicesUSALLCMember | whf:IndustrialSpecialtyServicesUSALLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 11,767 | ||||
| Ending Fair Value | 11,559 | $ 11,767 | |||
| Investment, Identifier [Axis]: Inspired Beauty Brands, Inc First Lien Secured Revolving Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 262 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:InspiredBeautyBrandsIncMember | whf:InspiredBeautyBrandsIncMember | |||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||
| Beginning Fair Value | $ 8 | ||||
| Ending Fair Value | 252 | $ 8 | |||
| Investment, Identifier [Axis]: Inspired Beauty Brands, Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 11,381 | $ 12,055 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:InspiredBeautyBrandsIncMember | whf:InspiredBeautyBrandsIncMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 12,252 | ||||
| Ending Fair Value | 11,159 | $ 12,252 | |||
| Investment, Identifier [Axis]: IvyRehab Intermediate II, LLC First Lien Secured Delayed Draw Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 2,517 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:IvyRehabIntermediateIILLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Beginning Fair Value | 2,534 | ||||
| Ending Fair Value | $ 2,534 | ||||
| Investment, Identifier [Axis]: IvyRehab Intermediate II, LLC First Lien Secured Revolving Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 139 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:IvyRehabIntermediateIILLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 147 | ||||
| Ending Fair Value | $ 147 | ||||
| Investment, Identifier [Axis]: IvyRehab Intermediate II, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 17,121 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:IvyRehabIntermediateIILLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 17,366 | ||||
| Ending Fair Value | $ 17,366 | ||||
| Investment, Identifier [Axis]: JVMC Holdings Corp First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 11,833 | $ 12,674 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:JVMCHoldingsCorpMember | whf:JVMCHoldingsCorpMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 12,729 | ||||
| Ending Fair Value | $ 11,860 | $ 12,729 | |||
| Investment, Identifier [Axis]: JZ Capital Partners Ltd First Lien Secured Delayed Draw Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:JZCapitalPartnersLtdMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Ending Fair Value | $ 9 | ||||
| Investment, Identifier [Axis]: JZ Capital Partners Ltd First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 10,118 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:JZCapitalPartnersLtdMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 10,135 | ||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Delayed Draw Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:JuniperLandscapingHoldingsLLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Delayed Draw Loan Due 12/29/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 1,882 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:JuniperLandscapingHoldingsLLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Ending Fair Value | $ 1,868 | ||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Revolving Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 586 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:JuniperLandscapingHoldingsLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 586 | ||||
| Ending Fair Value | $ 586 | ||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Revolving Loan Due 12/29/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 294 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:JuniperLandscapingHoldingsLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ 287 | ||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 11,221 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:JuniperLandscapingHoldingsLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 11,220 | ||||
| Ending Fair Value | $ 11,220 | ||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Term Loan Due 12/29/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 11,147 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:JuniperLandscapingHoldingsLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 11,079 | ||||
| Investment, Identifier [Axis]: Keras Holdings, LLC Shares | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 496 | $ 496 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:KerasHoldingsLLCMember | whf:KerasHoldingsLLCMember | |||
| Investment type | Common Stock | Common Stock | |||
| Beginning Fair Value | $ 496 | ||||
| Ending Fair Value | 363 | $ 496 | |||
| Investment, Identifier [Axis]: LHS Borrower, LLC First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LHSBorrowerLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 4 | ||||
| Ending Fair Value | $ 4 | ||||
| Investment, Identifier [Axis]: LHS Borrower, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 9,346 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LHSBorrowerLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 9,416 | ||||
| Ending Fair Value | $ 9,416 | ||||
| Investment, Identifier [Axis]: LHS Borrower, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.75%, Rate 7.75%, Due 9/30/2025 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LHSBorrowerLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 4 | ||||
| Ending Fair Value | $ 4 | ||||
| Investment, Identifier [Axis]: LHS Borrower, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.75%, Rate 7.75%, Due 9/30/2025 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 9,345 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LHSBorrowerLLCMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 9,416 | ||||
| Ending Fair Value | $ 9,416 | ||||
| Investment, Identifier [Axis]: LINC Systems, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.25%, Rate 7.25%, Due 2/24/2026 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LINCSystemsLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 12 | ||||
| Ending Fair Value | $ 12 | ||||
| Investment, Identifier [Axis]: LINC Systems, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 7.25%, Due 2/24/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 9,951 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LINCSystemsLLCMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | $ 10,101 | ||||
| Ending Fair Value | $ 10,101 | ||||
| Investment, Identifier [Axis]: LINC Systems, LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate 10.52%, Due 2/24/26 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LINCSystemsLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ (1) | ||||
| Investment, Identifier [Axis]: LINC Systems, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate 10.52%, Due 2/24/26 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 9,895 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LINCSystemsLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 9,882 | ||||
| Investment, Identifier [Axis]: LMG Holdings, Inc First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LMGHoldingsIncMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Investment, Identifier [Axis]: LMG Holdings, Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 6,684 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LMGHoldingsIncMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 6,687 | ||||
| Ending Fair Value | $ 6,687 | ||||
| Investment, Identifier [Axis]: LMG Holdings, Inc First Lien Secured Term Loan Due 4/30/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 13,284 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:QuestEventsLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 13,193 | ||||
| Investment, Identifier [Axis]: LMG Holdings, Inc. First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:QuestEventsLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ (6) | ||||
| Investment, Identifier [Axis]: LMG Holdings, Inc., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 4/30/2026 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LMGHoldingsIncMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Investment, Identifier [Axis]: LMG Holdings, Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 4/30/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 6,680 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LMGHoldingsIncMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 6,687 | ||||
| Ending Fair Value | $ 6,687 | ||||
| Investment, Identifier [Axis]: LSCS Holdings, Inc Second Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 4,935 | $ 4,925 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LSCSHoldingsIncMember | whf:LSCSHoldingsIncMember | |||
| Investment type | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 4,925 | ||||
| Ending Fair Value | 4,824 | $ 4,925 | |||
| Investment, Identifier [Axis]: Lab Logistics, LLC First Lien Secured Delayed Draw Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 5,124 | $ 5,166 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LabLogisticsLLCMember | whf:LabLogisticsLLCMember | |||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||
| Beginning Fair Value | $ 5,183 | ||||
| Ending Fair Value | 5,131 | $ 5,183 | |||
| Investment, Identifier [Axis]: Lab Logistics, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 5,446 | $ 1,140 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LabLogisticsLLCMember | whf:LabLogisticsLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 1,155 | ||||
| Ending Fair Value | 5,487 | $ 1,155 | |||
| Investment, Identifier [Axis]: Lab Logistics, LLC Preferred Units | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 857 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LabLogisticsLLCMember | ||||
| Investment type | whf:PreferredUnitsMember | ||||
| Beginning Fair Value | 1,018 | ||||
| Ending Fair Value | $ 1,018 | ||||
| Investment, Identifier [Axis]: Lenny & Larry's, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 11,198 | $ 11,084 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LennyLarrysLLCMember | whf:LennyLarrysLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 10,862 | ||||
| Ending Fair Value | 10,941 | $ 10,862 | |||
| Investment, Identifier [Axis]: Leviathan Intermediate Holdco, LLC First Lien Secured Revolving Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 76 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LeviathanIntermediateHoldcoLlcMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ 75 | ||||
| Investment, Identifier [Axis]: Leviathan Intermediate Holdco, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 10,139 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LeviathanIntermediateHoldcoLlcMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 10,138 | ||||
| Investment, Identifier [Axis]: Lift Brands, Inc First Lien Secured Term Loan A | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 5,531 | $ 5,570 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LiftBrandsIncMember | whf:LiftBrandsIncMember | |||
| Investment type | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | |||
| Beginning Fair Value | $ 5,546 | ||||
| Ending Fair Value | 5,520 | $ 5,546 | |||
| Investment, Identifier [Axis]: Lift Brands, Inc First Lien Secured Term Loan B | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 1,316 | $ 1,259 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LiftBrandsIncMember | whf:LiftBrandsIncMember | |||
| Investment type | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | |||
| Beginning Fair Value | $ 1,239 | ||||
| Ending Fair Value | 1,266 | $ 1,239 | |||
| Investment, Identifier [Axis]: Luxury Brand Holdings, Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 5,807 | $ 5,844 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:LuxuryBrandHoldingsIncMember | whf:LuxuryBrandHoldingsIncMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 5,940 | ||||
| Ending Fair Value | 5,880 | $ 5,940 | |||
| Investment, Identifier [Axis]: MBS Highway, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 9,250 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MbsHighwayLlcMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 9,250 | ||||
| Investment, Identifier [Axis]: MEP-TS Midco, LLC First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MEP-TSMidcoLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ 22 | ||||
| Investment, Identifier [Axis]: MEP-TS Midco, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 13,162 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MEP-TSMidcoLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 13,353 | ||||
| Investment, Identifier [Axis]: MEP-TS Midco, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/31/2026 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MEP-TSMidcoLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 28 | ||||
| Ending Fair Value | $ 28 | ||||
| Investment, Identifier [Axis]: MEP-TS Midco, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/31/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 13,247 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MEP-TSMidcoLLCMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | $ 13,490 | ||||
| Ending Fair Value | $ 13,490 | ||||
| Investment, Identifier [Axis]: MSI Information Services, Inc First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MSIInformationServicesIncMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ (9) | ||||
| Investment, Identifier [Axis]: MSI Information Services, Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 7,623 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MSIInformationServicesIncMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 7,554 | ||||
| Investment, Identifier [Axis]: Manchester Acquisition Sub LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 7,578 | $ 11,348 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:ManchesterAcquisitionSubLLCMember | whf:ManchesterAcquisitionSubLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 11,340 | ||||
| Ending Fair Value | 6,731 | $ 11,340 | |||
| Investment, Identifier [Axis]: Marlin DTC-LS Midco 2, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 4,200 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MarlinDTC-LSMidco2LLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 4,206 | ||||
| Ending Fair Value | $ 4,206 | ||||
| Investment, Identifier [Axis]: Marlin DTC-LS Midco 2, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 7/1/2025 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MarlinDTC-LSMidco2LLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 11 | ||||
| Ending Fair Value | $ 11 | ||||
| Investment, Identifier [Axis]: Marlin DTC-LS Midco 2, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 7/1/2025 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 15,153 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MarlinDTC-LSMidco2LLCMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | $ 15,342 | ||||
| Ending Fair Value | $ 15,342 | ||||
| Investment, Identifier [Axis]: Marlin DTC-LS Midco 2., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.23%, Due 7/1/25 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MarlinDTC-LSMidco2LLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ 8 | ||||
| Investment, Identifier [Axis]: Marlin DTC-LS Midco 2., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.23%, Due 7/1/25 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 18,920 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MarlinDTC-LSMidco2LLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 19,105 | ||||
| Investment, Identifier [Axis]: Max Solutions Inc. Common Stock | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 400 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MaxSolutionsIncMember | ||||
| Investment type | Common Stock | ||||
| Ending Fair Value | $ 283 | ||||
| Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.23%, Due 9/29/28 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MaxSolutionsIncMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Ending Fair Value | $ (26) | ||||
| Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Revolving Loan, Floor 1.00%, Spread CDOR plus 6.50%, Rate 11.23%, Due 9/29/28 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MaxSolutionsIncMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.23%, Due 9/29/28 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MaxSolutionsIncMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.23%, Due 9/29/28 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 8,085 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MaxSolutionsIncMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 8,085 | ||||
| Investment, Identifier [Axis]: Maxitransfers Blocker Corp First Lien Secured Revolving Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 1,019 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MaxitransfersBlockerCorpMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 1,038 | ||||
| Ending Fair Value | $ 1,038 | ||||
| Investment, Identifier [Axis]: Maxitransfers Blocker Corp First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 8,436 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MaxitransfersBlockerCorpMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 8,590 | ||||
| Ending Fair Value | $ 8,590 | ||||
| Investment, Identifier [Axis]: Meta Buyer LLC, First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 11/1/2027 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MetaBuyerLLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Investment, Identifier [Axis]: Meta Buyer LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 11/1/2027 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 246 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MetaBuyerLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 246 | ||||
| Ending Fair Value | $ 246 | ||||
| Investment, Identifier [Axis]: Meta Buyer LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 11/1/2027 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 972 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MetaBuyerLLCMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 972 | ||||
| Ending Fair Value | $ 972 | ||||
| Investment, Identifier [Axis]: Meta Buyer LLC, First lien Secured Term Loan, Floor 1.00%, Spread E plus 6.00%, Rate 7.00%, Due 11/1/2027 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 13,737 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MetaBuyerLLCMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 13,843 | ||||
| Ending Fair Value | $ 13,843 | ||||
| Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF plus 6.00%, Rate 10.81%, Due 11/1/27 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 878 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MetaBuyerLLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Ending Fair Value | $ 876 | ||||
| Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 6.00%, Rate 10.81%, Due 11/1/27 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MetaBuyerLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ (3) | ||||
| Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Term Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 8.17%, Due 11/20/27 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 13,643 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MetaBuyerLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 12,876 | ||||
| Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.00%, Rate 10.62%, Due 11/1/27 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 966 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MetaBuyerLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 963 | ||||
| Investment, Identifier [Axis]: Mikawaya Holdings, LLC, First Lien Secured Term Loan, Floor 1.25%, Spread L plus 5.50%, Rate 6.75%, Due 1/29/2025 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 2,988 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MikawayaHoldingsLLCMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 3,026 | ||||
| Ending Fair Value | $ 3,026 | ||||
| Investment, Identifier [Axis]: Mills Fleet Farm Group, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 13,331 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MillsFleetFarmGroupLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 13,538 | ||||
| Ending Fair Value | $ 13,538 | ||||
| Investment, Identifier [Axis]: Motivational CIV, LLC Class B Units | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 1,250 | $ 1,250 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MotivationalCIVLLCMember | whf:MotivationalCIVLLCMember | |||
| Investment type | whf:ClassBUnitsMember | whf:ClassBUnitsMember | |||
| Beginning Fair Value | $ 1,250 | ||||
| Ending Fair Value | 517 | $ 1,250 | |||
| Investment, Identifier [Axis]: Motivational Marketing, LLC First Lien Secured Revolving Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 155 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MotivationalMarketingLLCMember | whf:MotivationalMarketingLLCMember | |||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||
| Beginning Fair Value | $ 7 | ||||
| Ending Fair Value | 133 | $ 7 | |||
| Investment, Identifier [Axis]: Motivational Marketing, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 10,956 | $ 11,575 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MotivationalMarketingLLCMember | whf:MotivationalMarketingLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 11,646 | ||||
| Ending Fair Value | 10,749 | $ 11,646 | |||
| Investment, Identifier [Axis]: NMFC Senior Loan Program I LLC Units, Equity | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:NmfcSeniorLoanProgramILlcUnitsMember | ||||
| Investment type | Equity (excluding STRS JV) | ||||
| Dividends and interest included in income | $ 293 | ||||
| Beginning Fair Value | 9,269 | ||||
| Sales | (10,000) | ||||
| Net Change in Unrealized Appreciation (Depreciation) | 761 | ||||
| Ending Fair Value | 9,269 | ||||
| Investment, Identifier [Axis]: NNA Services, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 11,199 | $ 11,459 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:NNAServicesLLCMember | whf:NNAServicesLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 11,460 | ||||
| Ending Fair Value | 10,833 | $ 11,460 | |||
| Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 10.92%, Due 1/21/27 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 285 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:NPAVLessorCorp.Member | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ 247 | ||||
| Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 10.92%, Due 1/21/27 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 8,778 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:NPAVLessorCorp.Member | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 8,301 | ||||
| Investment, Identifier [Axis]: Naviga Inc First Lien Secured Revolving Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 267 | $ 168 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:NavigaIncMember | whf:NavigaIncMember | |||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||
| Beginning Fair Value | $ 169 | ||||
| Ending Fair Value | 258 | $ 169 | |||
| Investment, Identifier [Axis]: Naviga Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 3,177 | $ 3,195 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:NavigaIncMember | whf:NavigaIncMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 3,213 | ||||
| Ending Fair Value | 3,084 | $ 3,213 | |||
| Investment, Identifier [Axis]: Nelson Worldwide, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 9,976 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:NelsonWorldwideLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 9,826 | ||||
| Ending Fair Value | $ 9,826 | ||||
| Investment, Identifier [Axis]: PFB Holdco, Inc Class A Units | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 423 | $ 423 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PFBHoldcoIncMember | whf:PFBHoldcoIncMember | |||
| Investment type | whf:ClassAUnitsMember | whf:ClassAUnitsMember | |||
| Beginning Fair Value | $ 427 | ||||
| Ending Fair Value | $ 786 | $ 427 | |||
| Investment, Identifier [Axis]: PFB Holdco, Inc First Lien Secured Revolving Loan Floor 2.45 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PFBHoldcoIncMember | whf:PFBHoldcoIncMember | |||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||
| Ending Fair Value | $ 2 | ||||
| Investment, Identifier [Axis]: PFB Holdco, Inc First Lien Secured Revolving Loan Floor 3.25 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PFBHoldcoIncMember | whf:PFBHoldcoIncMember | |||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||
| Investment, Identifier [Axis]: PFB Holdco, Inc First Lien Secured Term Loan Floor 2.45 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 6,879 | $ 6,923 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PFBHoldcoIncMember | whf:PFBHoldcoIncMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 6,998 | ||||
| Ending Fair Value | 6,504 | $ 6,998 | |||
| Investment, Identifier [Axis]: PFB Holdco, Inc First Lien Secured Term Loan Floor 3.25 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 2,141 | $ 2,154 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PFBHoldcoIncMember | whf:PFBHoldcoIncMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 2,154 | ||||
| Ending Fair Value | 2,144 | $ 2,154 | |||
| Investment, Identifier [Axis]: PG Dental New Jersey Parent, LLC First Lien Secured Revolving Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 347 | $ 689 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PGDentalNewJerseyParentLLCMember | whf:PGDentalNewJerseyParentLLCMember | |||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||
| Beginning Fair Value | $ 631 | ||||
| Ending Fair Value | 300 | $ 631 | |||
| Investment, Identifier [Axis]: PG Dental New Jersey Parent, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 13,324 | $ 15,178 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PGDentalNewJerseyParentLLCMember | whf:PGDentalNewJerseyParentLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 14,212 | ||||
| Ending Fair Value | $ 12,415 | $ 14,212 | |||
| Investment, Identifier [Axis]: PPS CR Acquisition, Inc First Lien Secured Delayed Draw Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PPSCRAcquisitionIncMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Ending Fair Value | $ (34) | ||||
| Investment, Identifier [Axis]: PPS CR Acquisition, Inc First Lien Secured Revolving Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 828 | $ 103 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PPSCRAcquisitionIncMember | whf:PPSCRAcquisitionIncMember | |||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||
| Beginning Fair Value | $ 113 | ||||
| Ending Fair Value | 780 | $ 113 | |||
| Investment, Identifier [Axis]: PPS CR Acquisition, Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 13,922 | $ 10,924 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PPSCRAcquisitionIncMember | whf:PPSCRAcquisitionIncMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 10,975 | ||||
| Ending Fair Value | 13,774 | $ 10,975 | |||
| Investment, Identifier [Axis]: PS Lightwave, Inc., First Lien Secured Delayed Draw Loan, Floor 1.50%, Spread L plus 6.75%, Rate 8.25%, Due 3/10/2025 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PSLightwaveInc.Member | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Beginning Fair Value | 5 | ||||
| Ending Fair Value | $ 5 | ||||
| Investment, Identifier [Axis]: PS Lightwave, Inc., First Lien Secured Term Loan, Floor 1.50%, Spread L plus 6.75%, Rate 8.25%, Due 3/10/2025 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 7,207 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PSLightwaveInc.Member | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 7,230 | ||||
| Ending Fair Value | $ 7,230 | ||||
| Investment, Identifier [Axis]: Patagonia Hold co Llc First Lien Secured Term Loans | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 12,105 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PatagoniaHoldcoLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 12,068 | ||||
| Investment, Identifier [Axis]: Pennsylvania Machine Works., First Lien Secured Term Loan, Floor 1.00%, Spread SF plus 6.25%, Rate 11.09%, Due 3/8/27 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 6,821 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PennsylvaniaMachineWorksLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 6,801 | ||||
| Investment, Identifier [Axis]: PlayMonster LLC First Lien Secured Delayed Draw Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 221 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | PlayMonster LLC | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Beginning Fair Value | $ (828) | ||||
| Ending Fair Value | $ (828) | ||||
| Investment, Identifier [Axis]: PlayMonster LLC First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | PlayMonster LLC | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Dividends and interest included in income | $ 13 | ||||
| Purchases | 1,088 | ||||
| Sales | (1,088) | ||||
| Investment, Identifier [Axis]: PlayMonster LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 5,894 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | PlayMonster LLC | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | $ 3,900 | ||||
| Ending Fair Value | $ 3,900 | ||||
| Investment, Identifier [Axis]: Playmonster Group Equity Inc Common Equity | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PlaymonsterGroupEquityIncMember | ||||
| Investment type | Common Stock | ||||
| Purchases | $ 460 | ||||
| Net Change in Unrealized Appreciation (Depreciation) | $ (460) | ||||
| Investment, Identifier [Axis]: Playmonster Group Equity Inc Preferred Equity | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PlaymonsterGroupEquityIncMember | ||||
| Investment type | us-gaap:PreferredStockMember | ||||
| Purchases | $ 3,600 | ||||
| Net Change in Unrealized Appreciation (Depreciation) | (3,600) | ||||
| Investment, Identifier [Axis]: Playmonster Group Equity, Inc Common Stock | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 460 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PlaymonsterGroupEquityIncMember | ||||
| Investment type | Common Stock | ||||
| Investment, Identifier [Axis]: Playmonster Group Equity, Inc. Preferred Stock | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 3,600 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PlaymonsterGroupEquityIncMember | ||||
| Investment type | us-gaap:PreferredStockMember | ||||
| Investment, Identifier [Axis]: Playmonster Group LLC First Lien Secured Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PlaymonsterGroupLLCMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Dividends and interest included in income | $ 325 | ||||
| Purchases | 3,662 | ||||
| Net Change in Unrealized Appreciation (Depreciation) | (685) | ||||
| Ending Fair Value | 2,977 | ||||
| Investment, Identifier [Axis]: Playmonster Group LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 3,664 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PlaymonsterGroupLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 2,977 | ||||
| Investment, Identifier [Axis]: Playmonster Group LLC Priority First Lien Secured Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PlaymonsterGroupLLCMember | ||||
| Investment type | whf:PriorityFirstLienSecuredLoanMember | ||||
| Dividends and interest included in income | $ 1 | ||||
| Purchases | 176 | ||||
| Ending Fair Value | 176 | ||||
| Investment, Identifier [Axis]: Playmonster Group LLC, Priority First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 176 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PlaymonsterGroupLLCMember | ||||
| Investment type | whf:PriorityFirstLienSecuredLoanMember | ||||
| Ending Fair Value | $ 176 | ||||
| Investment, Identifier [Axis]: Potpourri Group, Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 14,091 | $ 16,955 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PotpourriGroupIncMember | whf:PotpourriGroupIncMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 17,148 | ||||
| Ending Fair Value | 14,187 | $ 17,148 | |||
| Investment, Identifier [Axis]: Poultry Holdings LLC (HPP), First Lien Secured Term Loan, Floor 1.00%, Spread L plus 7.25%, Rate 8.25% (6.75% Cash + 1.50% PIK), Due 6/28/225 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 7,676 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PoultryHoldingsLLCMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 6,993 | ||||
| Ending Fair Value | $ 6,993 | ||||
| Investment, Identifier [Axis]: Poultry Holdings LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 7.25%, Rate 11.67% (10.17% Cash + 1.50% PIK), Due 6/28/25 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 7,101 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:PoultryHoldingsLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 7,011 | ||||
| Investment, Identifier [Axis]: Project Castle, Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 7,535 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:ProjectCastleIncMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 7,269 | ||||
| Investment, Identifier [Axis]: Quest Events, LLC First Lien Secured Revolving Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 464 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:QuestEventsLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ 431 | ||||
| Investment, Identifier [Axis]: Quest Events, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 11,728 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:QuestEventsLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 11,298 | ||||
| Investment, Identifier [Axis]: Quest Events, LLC Preferred Units | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 347 | $ 317 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:QuestEventsLLCMember | whf:QuestEventsLLCMember | |||
| Investment type | us-gaap:PreferredStockMember | whf:PreferredUnitsMember | |||
| Ending Fair Value | $ 110 | ||||
| Investment, Identifier [Axis]: Quest Events, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/28/2024 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 925 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:QuestEventsLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 760 | ||||
| Ending Fair Value | $ 760 | ||||
| Investment, Identifier [Axis]: Quest Events, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/28/2024 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 11,848 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:QuestEventsLLCMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 9,729 | ||||
| Ending Fair Value | $ 9,729 | ||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC , First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.25%, Rate 7.25%, Due 12/31/2026 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:RCKCAcquisitionsLLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Beginning Fair Value | (5) | ||||
| Ending Fair Value | $ (5) | ||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC , First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.25%, Rate 7.25%, Due 12/31/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 804 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:RCKCAcquisitionsLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 814 | ||||
| Ending Fair Value | $ 814 | ||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC , First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 7.25%, Due 12/312026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 11,074 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:RCKCAcquisitionsLLCMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 11,151 | ||||
| Ending Fair Value | $ 11,151 | ||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.25%, Rate 10.64%, Due 12/31/26 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 2,963 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:RCKCAcquisitionsLLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Ending Fair Value | $ 2,947 | ||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.25%, Rate 10.57%, Due 12/31/26 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 526 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:RCKCAcquisitionsLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ 517 | ||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 10.98%, Due 12/31/26 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 11,000 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:RCKCAcquisitionsLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 10,929 | ||||
| Investment, Identifier [Axis]: RLJ Pro-Vac, Inc. First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 8,600 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:RLJPro-VacInc.Member | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 8,600 | ||||
| Ending Fair Value | $ 8,600 | ||||
| Investment, Identifier [Axis]: RLJ Pro-Vac, Inc. First Lien Secured Term Loan First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:RLJPro-VacInc.Member | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Investment, Identifier [Axis]: Road Safety Services, First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 4,017 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:RoadSafetyServicesIncMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 4,017 | ||||
| Ending Fair Value | $ 4,017 | ||||
| Investment, Identifier [Axis]: Road Safety Services, Inc. First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 8,522 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:RoadSafetyServicesIncMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 8,432 | ||||
| Investment, Identifier [Axis]: Road Safety Services, Inc., First Lien Secured Revolving Loan, Floor 3.25%, Spread P plus 5.50%, Rate 8.75%, Due 9/18/2023 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 489 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:RoadSafetyServicesIncMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 501 | ||||
| Ending Fair Value | $ 501 | ||||
| Investment, Identifier [Axis]: Road Safety Services, Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 3/18/2025 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 6,340 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:RoadSafetyServicesIncMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 6,405 | ||||
| Ending Fair Value | $ 6,405 | ||||
| Investment, Identifier [Axis]: Ross-Simons Topco, LP Preferred Units | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 514 | $ 600 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:Ross-SimonsTopcoLPMember | whf:Ross-SimonsTopcoLPMember | |||
| Investment type | us-gaap:PreferredStockMember | whf:PreferredUnitsMember | |||
| Beginning Fair Value | $ 786 | ||||
| Ending Fair Value | $ 714 | $ 786 | |||
| Investment, Identifier [Axis]: SFS Global Holding Company Warrants | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SFSGlobalHoldingCompanyMember | whf:SnapFitnessHoldingsIncMember | |||
| Investment type | Warrant | Warrant | |||
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC Common Stock | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 400 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SalonRepublicHoldingsLlcMember | ||||
| Investment type | Common Stock | ||||
| Ending Fair Value | $ 400 | ||||
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC First Lien Secured Delayed Draw Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 55 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SalonRepublicHoldingsLlcMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Ending Fair Value | $ 55 | ||||
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC First Lien Secured Revolving Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 251 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SalonRepublicHoldingsLlcMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ 251 | ||||
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 5,003 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SalonRepublicHoldingsLlcMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 5,003 | ||||
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC, Preferred Stock | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 200 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SalonRepublicHoldingsLlcMember | ||||
| Investment type | us-gaap:PreferredStockMember | ||||
| Ending Fair Value | $ 200 | ||||
| Investment, Identifier [Axis]: Sigue Corporation Warrants | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 2,890 | $ 2,890 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SigueCorporationMember | whf:SigueCorporationMember | |||
| Investment type | Warrant | Warrant | |||
| Beginning Fair Value | $ 3,492 | ||||
| Ending Fair Value | 3,788 | $ 3,492 | |||
| Investment, Identifier [Axis]: Sklar Holdings, Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 7,302 | $ 7,295 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SklarHoldingsIncMember | whf:SklarHoldingsIncMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 7,020 | ||||
| Ending Fair Value | $ 6,537 | $ 7,020 | |||
| Investment, Identifier [Axis]: Sleep OpCo LLC First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SleepOpCoLLCMember | whf:SleepOpCoLLCMember | |||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||
| Ending Fair Value | $ (39) | ||||
| Investment, Identifier [Axis]: Sleep OpCo LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 20,517 | $ 19,651 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SleepOpCoLLCMember | whf:SleepOpCoLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 19,645 | ||||
| Ending Fair Value | 20,210 | $ 19,645 | |||
| Investment, Identifier [Axis]: Smalto Inc., First Lien Secured Term Loan, Floor 1.00%, Spread E plus 6.25%, Rate 9.00%, Due 4/28/28 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 6,865 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SmaltoInc.Member | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 6,899 | ||||
| Investment, Identifier [Axis]: Smalto Inc., First Lien Secured Term Loan, Floor 1.00%, Spread SF plus 6.00%, Rate 11.04%, Due 4/28/28 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 994 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SmaltoInc.Member | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 986 | ||||
| Investment, Identifier [Axis]: Snap Fitness Holdings, Inc Class A Common Stock | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 1,941 | $ 1,941 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SnapFitnessHoldingsIncMember | whf:SnapFitnessHoldingsIncMember | |||
| Investment type | us-gaap:CommonClassAMember | us-gaap:CommonClassAMember | |||
| Beginning Fair Value | $ 188 | ||||
| Ending Fair Value | 131 | $ 188 | |||
| Investment, Identifier [Axis]: Snap Fitness Holdings, Inc First Lien Secured Term Loan C | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 1,265 | $ 1,265 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SnapFitnessHoldingsIncMember | whf:SnapFitnessHoldingsIncMember | |||
| Investment type | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | |||
| Beginning Fair Value | $ 1,219 | ||||
| Ending Fair Value | 1,198 | $ 1,219 | |||
| Investment, Identifier [Axis]: Snap Fitness Holdings, Inc Warrants | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 793 | $ 793 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SnapFitnessHoldingsIncMember | whf:SnapFitnessHoldingsIncMember | |||
| Investment type | Warrant | Warrant | |||
| Beginning Fair Value | $ 76 | ||||
| Ending Fair Value | $ 53 | $ 76 | |||
| Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate 8.94 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | Solar Holdings Bidco Limited | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Ending Fair Value | $ (62) | ||||
| Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate 9.74 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 51 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | Solar Holdings Bidco Limited | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Ending Fair Value | $ 52 | ||||
| Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Term Loan CDOR | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 2,729 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | Solar Holdings Bidco Limited | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 2,749 | ||||
| Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Term Loan SF | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 2,709 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | Solar Holdings Bidco Limited | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 2,713 | ||||
| Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Term Loan SONIA | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 182 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | Solar Holdings Bidco Limited | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 199 | ||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC , First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 7/30/2027 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SourceCodeHoldingsLLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Beginning Fair Value | 1 | ||||
| Ending Fair Value | $ 1 | ||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC , First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 7/30/2027 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 7,487 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SourceCodeHoldingsLLCMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 7,489 | ||||
| Ending Fair Value | $ 7,489 | ||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC First Lien Secured Delayed Draw Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SourceCodeHoldingsLLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 7,487 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SourceCodeHoldingsLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | $ 7,489 | ||||
| Ending Fair Value | $ 7,489 | ||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus, 6.50%, Rate 10.92%, Due 7/30/27 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:E-PhoenixAcquisitionCo.Inc.Member | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Ending Fair Value | $ 2 | ||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus, 6.50%, Rate 10.92%, Due 7/30/27 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 14,874 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:E-PhoenixAcquisitionCo.Inc.Member | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 14,882 | ||||
| Investment, Identifier [Axis]: Stella & Chewy's LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus 8.75%, Rate 13.17% (11.17% Cash + 2.00% PIK), Due 12/16/25 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 1,362 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:StellaandChewysLLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Ending Fair Value | $ 1,320 | ||||
| Investment, Identifier [Axis]: Stella & Chewy's LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 8.75%, Rate 13.40% (11.40% Cash + 2.00% PIK), Due 12/16/25 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 3,849 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:StellaandChewysLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 3,738 | ||||
| Investment, Identifier [Axis]: Stella and Chewy's LLC, First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.75%, Rate 7.75%, Due 12/16/2025 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 1,877 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:StellaandChewysLLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Beginning Fair Value | 1,697 | ||||
| Ending Fair Value | $ 1,697 | ||||
| Investment, Identifier [Axis]: Stella and Chewy's LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.75%, Rate 7.75%, Due 12/16/2025 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 5,228 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:StellaandChewysLLCMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 4,967 | ||||
| Ending Fair Value | $ 4,967 | ||||
| Investment, Identifier [Axis]: StoicLane MidCo, LLC First Lien Secured Delayed Draw Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 3,563 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:StoiclaneMidcoLlcMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Ending Fair Value | $ 3,563 | ||||
| Investment, Identifier [Axis]: StoicLane MidCo, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 4,540 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:StoiclaneMidcoLlcMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 4,540 | ||||
| Investment, Identifier [Axis]: Sunless, Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 2,051 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SunlessInc.Member | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 2,071 | ||||
| Investment, Identifier [Axis]: Sunless, Inc., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 8/13/2024 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SunlessIncMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 14 | ||||
| Ending Fair Value | $ 14 | ||||
| Investment, Identifier [Axis]: Sunless, Inc., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.24%, Due 8/13/25 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 264 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MaxSolutionsIncMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ 270 | ||||
| Investment, Identifier [Axis]: Sunless, Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 8/13/2024 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 4,185 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SunlessIncMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 4,259 | ||||
| Ending Fair Value | $ 4,259 | ||||
| Investment, Identifier [Axis]: Sunless, Inc.., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.23%, Due 8/13/25 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 3,631 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:MaxSolutionsIncMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 3,679 | ||||
| Investment, Identifier [Axis]: Sure Fit Home Products, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 4,828 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:SureFitHomeProductsLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 4,372 | ||||
| Ending Fair Value | $ 4,372 | ||||
| Investment, Identifier [Axis]: TOUR Intermediate Holdings, LLC, First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 5/15/2025 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 2,600 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:TOURIntermediateHoldingsLLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Beginning Fair Value | 2,616 | ||||
| Ending Fair Value | $ 2,616 | ||||
| Investment, Identifier [Axis]: TOUR Intermediate Holdings, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 5/15/2025 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 7,343 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:TOURIntermediateHoldingsLLCMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 7,438 | ||||
| Ending Fair Value | $ 7,438 | ||||
| Investment, Identifier [Axis]: TOUR Intermediate Holdings., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.50%, Rate 10.88%, Due 5/15/25 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 2,458 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:TOURIntermediateHoldingsLLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Ending Fair Value | $ 2,468 | ||||
| Investment, Identifier [Axis]: TOUR Intermediate Holdings., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 10.88%, Due 5/15/25 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 3,049 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:TOURIntermediateHoldingsLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 3,077 | ||||
| Investment, Identifier [Axis]: Team Car Care Holdings, First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 14,311 | $ 15,193 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:TeamCarCareHoldingsLLCMember | whf:TeamCarCareHoldingsLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 15,286 | ||||
| Ending Fair Value | $ 14,363 | $ 15,286 | |||
| Investment, Identifier [Axis]: Telestream Holdings Corporation First Lien Secured Delayed Draw Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | Telestream Holdings Corporation | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Ending Fair Value | $ 3 | ||||
| Investment, Identifier [Axis]: Telestream Holdings Corporation First Lien Secured Revolving Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 910 | $ 517 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | Telestream Holdings Corporation | Telestream Holdings Corporation | |||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||
| Beginning Fair Value | $ 549 | ||||
| Ending Fair Value | 928 | $ 549 | |||
| Investment, Identifier [Axis]: Telestream Holdings Corporation First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 15,556 | $ 14,713 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | Telestream Holdings Corporation | Telestream Holdings Corporation | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 15,079 | ||||
| Ending Fair Value | 15,762 | $ 15,079 | |||
| Investment, Identifier [Axis]: Tensar Corporation First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 6,797 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:TensarCorporationMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 7,069 | ||||
| Ending Fair Value | $ 7,069 | ||||
| Investment, Identifier [Axis]: Tensar Corporation, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.75%, Rate 7.75%, Due 8/20/2025 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 6,797 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:TensarCorporationMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 7,069 | ||||
| Ending Fair Value | $ 7,069 | ||||
| Investment, Identifier [Axis]: The Kyjen Company, LLC First Lien Secured Revolving Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 790 | $ 380 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:TheKyjenCompanyLLCMember | whf:TheKyjenCompanyLLCMember | |||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||
| Beginning Fair Value | $ 390 | ||||
| Ending Fair Value | 724 | $ 390 | |||
| Investment, Identifier [Axis]: The Kyjen Company, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 11,223 | $ 11,257 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:TheKyjenCompanyLLCMember | whf:TheKyjenCompanyLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 11,383 | ||||
| Ending Fair Value | 10,429 | $ 11,383 | |||
| Investment, Identifier [Axis]: Token Buyer, Inc First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 6,680 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:TokenBuyerIncMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 6,615 | ||||
| Investment, Identifier [Axis]: Trimlite Buyer LLC First Lien Secured Revolving Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 161 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:TrimliteBuyerLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 161 | ||||
| Ending Fair Value | $ 161 | ||||
| Investment, Identifier [Axis]: Trimlite Buyer LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 16,162 | $ 17,975 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:TrimliteBuyerLLCMember | whf:TrimliteBuyerLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 17,841 | ||||
| Ending Fair Value | 14,926 | $ 17,841 | |||
| Investment, Identifier [Axis]: True Blue Car Wash, LLC First Lien Secured Delayed Draw Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 4,107 | $ 3,073 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:TrueBlueCarWashLLCMember | whf:TrueBlueCarWashLLCMember | |||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||
| Beginning Fair Value | $ 3,098 | ||||
| Ending Fair Value | 4,189 | $ 3,098 | |||
| Investment, Identifier [Axis]: True Blue Car Wash, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 9,822 | $ 8,087 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:TrueBlueCarWashLLCMember | whf:TrueBlueCarWashLLCMember | |||
| Investment type | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||
| Beginning Fair Value | $ 8,130 | ||||
| Ending Fair Value | 9,942 | $ 8,130 | |||
| Investment, Identifier [Axis]: Turnberry Solutions, Inc., First Lien Secured Revolving Loan, Floor 3.25%, Spread P plus 5.00%, Rate 8.25%, Due 9/2/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 84 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:TurnberrySolutionsInc.Member | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 85 | ||||
| Ending Fair Value | $ 85 | ||||
| Investment, Identifier [Axis]: Turnberry Solutions, Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 9/2/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 5,689 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:TurnberrySolutionsInc.Member | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | $ 5,684 | ||||
| Ending Fair Value | $ 5,684 | ||||
| Investment, Identifier [Axis]: Turnberry Solutions., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 6.00%, Rate 9.19%, Due 9/2/28 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:TurnberrySolutionsInc.Member | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ (4) | ||||
| Investment, Identifier [Axis]: Turnberry Solutions., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.00%, Rate 9.19%, Due 9/2/26 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 5,998 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:TurnberrySolutionsInc.Member | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 5,964 | ||||
| Investment, Identifier [Axis]: US Methanol Midco LLC (d/b/a US Methanol LLC) First Lien Secured Delayed Draw Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:UsMethanolMidcoLlcMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Investment, Identifier [Axis]: US Methanol Midco LLC (d/b/a US Methanol LLC) First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 4,551 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:UsMethanolMidcoLlcMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 4,551 | ||||
| Investment, Identifier [Axis]: Unleashed Brands, LLC, First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 5.50%, Rate 6.50%, Due 11/19/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 5,083 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:UnleashedBrandsLLCMember | ||||
| Investment type | whf:FirstLienSecuredDelayedDrawLoanMember | ||||
| Beginning Fair Value | 5,082 | ||||
| Ending Fair Value | $ 5,082 | ||||
| Investment, Identifier [Axis]: Unleashed Brands, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 5.50%, Rate 6.50%, Due 11/19/2026 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:UnleashedBrandsLLCMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Investment, Identifier [Axis]: Unleashed Brands, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 5.50%, Rate 6.50%, Due 11/19/2026 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 3,848 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:UnleashedBrandsLLCMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | $ 3,848 | ||||
| Ending Fair Value | $ 3,848 | ||||
| Investment, Identifier [Axis]: WH Lessor Corp. First Lien Secured Revolving Loan | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:WHLessorCorpMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Ending Fair Value | $ 4 | ||||
| Investment, Identifier [Axis]: WH Lessor Corp. First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 7,402 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:WHLessorCorpMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Ending Fair Value | $ 7,470 | ||||
| Investment, Identifier [Axis]: WH Lessor Corp., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/26/2024 | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:WHLessorCorpMember | ||||
| Investment type | whf:FirstLienSecuredRevolvingLoanMember | ||||
| Beginning Fair Value | 6 | ||||
| Ending Fair Value | $ 6 | ||||
| Investment, Identifier [Axis]: WH Lessor Corp., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/26/2024 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 6,780 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:WHLessorCorpMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | $ 6,866 | ||||
| Ending Fair Value | $ 6,866 | ||||
| Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Equity | |||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:WHFSTRSOhioSeniorLoanFundLLCMember | whf:WHFSTRSOhioSeniorLoanFundLLCMember | |||
| Investment type | Equity (excluding STRS JV) | Equity (excluding STRS JV) | |||
| Dividends and interest included in income | $ 6,977 | $ 4,907 | |||
| Beginning Fair Value | 15,607 | 10,167 | |||
| Purchases | 5,000 | 4,732 | |||
| Net Change in Unrealized Appreciation (Depreciation) | (447) | 708 | |||
| Ending Fair Value | 20,160 | 15,607 | 10,167 | ||
| Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Interests | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 20,000 | $ 15,000 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:WHFSTRSOhioSeniorLoanFundMember | whf:WHFSTRSOhioSeniorLoanFundMember | |||
| Investment type | whf:LLCInterestsMember | whf:LLCInterestsMember | |||
| Beginning Fair Value | $ 15,607 | ||||
| Ending Fair Value | 20,160 | $ 15,607 | |||
| Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Subordinated Note | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 80,000 | $ 60,000 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:WHFSTRSOhioSeniorLoanFundLLCMember | whf:WHFSTRSOhioSeniorLoanFundLLCMember | |||
| Investment type | Subordinated Notes | Subordinated Notes | |||
| Dividends and interest included in income | $ 6,385 | $ 3,307 | |||
| Beginning Fair Value | 60,000 | 41,073 | |||
| Purchases | 20,000 | 18,927 | |||
| Ending Fair Value | 80,000 | 60,000 | $ 41,073 | ||
| Investment, Identifier [Axis]: Westrock Coffee Company, LLC, First lien Secured Term Loan, Floor 1.50%, Spread L plus 8.50%, Rate 10.00% (9.75% Cash + 0.25% PIK), Due 2/28/2025 | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 9,033 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:WestrockCoffeeCompanyLLCMember | ||||
| Investment type | whf:FirstLienSecuredLoanMember | ||||
| Beginning Fair Value | 8,923 | ||||
| Ending Fair Value | $ 8,923 | ||||
| Investment, Identifier [Axis]: What If Holdings, LLC First Lien Secured Term Loan | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 18,609 | ||||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:WhatIfHoldingsLLCMember | ||||
| Investment type | whf:FirstLienSecuredTermLoanMember | ||||
| Beginning Fair Value | 18,759 | ||||
| Ending Fair Value | $ 18,759 | ||||
| Investment, Identifier [Axis]: What If Media Group, LLC Common Units | |||||
| Investments in and Advances to Affiliates [Line Items] | |||||
| Cost of investment | $ 851 | $ 850 | |||
| Schedule of investments in and advances to affiliated and controlled persons | |||||
| Issuer name | whf:WhatIfMediaGroupLLCMember | whf:WhatIfMediaGroupLLCMember | |||
| Investment type | whf:CommonUnitsMember | whf:CommonUnitsMember | |||
| Beginning Fair Value | $ 1,398 | ||||
| Ending Fair Value | $ 1,943 | $ 1,398 | |||
INVESTMENTS - WHF STRS Ohio Sen
| INVESTMENTS - WHF STRS Ohio Senior Loan Fund LLC (Details) | 1 Months Ended | 12 Months Ended | ||||||||
| Mar. 11, 2022 USD ($) | Jul. 15, 2021 | Jul. 31, 2019 | Dec. 31, 2022 USD ($) company | Mar. 10, 2022 USD ($) | Feb. 28, 2022 USD ($) | Dec. 31, 2021 USD ($) company | Jan. 27, 2021 USD ($) | Jul. 19, 2019 USD ($) | Jan. 14, 2019 USD ($) | |
| Schedule of Investments [Line Items] | ||||||||||
| Investments | $ 760,228,000 | $ 819,208,000 | ||||||||
| Cost of investment | 782,429,000 | 831,960,000 | ||||||||
| Available | 79,855,000 | 43,363,000 | ||||||||
| Amortized Cost, credit facility | 440,427,000 | 475,958,000 | ||||||||
| LIBOR or SOFR | Minimum [Member] | ||||||||||
| Schedule of Investments [Line Items] | ||||||||||
| Term of interest | 3 years | |||||||||
| LIBOR or SOFR | Maximum [Member] | ||||||||||
| Schedule of Investments [Line Items] | ||||||||||
| Term of interest | 6 years | |||||||||
| Subordinated Notes | ||||||||||
| Schedule of Investments [Line Items] | ||||||||||
| Investments | 167,000 | 167,000 | ||||||||
| Cost of investment | 167,000 | 167,000 | ||||||||
| Equity (excluding STRS JV) | ||||||||||
| Schedule of Investments [Line Items] | ||||||||||
| Investments | 41,160,000 | 38,159,000 | ||||||||
| Cost of investment | $ 46,486,000 | $ 36,991,000 | ||||||||
| STRS JV | ||||||||||
| Schedule of Investments [Line Items] | ||||||||||
| Combined investment commitment in joint venture | $ 125,000,000 | |||||||||
| Investment commitment in joint venture | $ 100,000,000 | 75,000,000 | ||||||||
| Increase in investment commitment in joint venture | $ 25,000,000 | |||||||||
| Economic ownership (as a percent) | 66.67% | 66.67% | 60% | |||||||
| Investments | $ 305,296,000 | $ 273,523,000 | ||||||||
| Portfolio companies | company | 28 | 28 | ||||||||
| Largest single investment | $ 20,086,000 | $ 23,483,000 | ||||||||
| Five largest investments | 77,635,000 | 83,057,000 | ||||||||
| STRS JV | STRS JV Credit Facility | ||||||||||
| Schedule of Investments [Line Items] | ||||||||||
| Maximum borrowing limit | $ 225,000,000 | 225,000,000 | 175,000,000 | $ 175,000,000 | $ 125,000,000 | |||||
| Variable interest rate (as a percent) | 2.35% | |||||||||
| Available | 168,750,000 | $ 131,250,000 | ||||||||
| Borrowings greater than | $ 175,000,000 | |||||||||
| Amortized Cost, credit facility | $ 152,277,000 | $ 146,782,000 | ||||||||
| Effective interest rate (as a percent) | 6.60% | 2.50% | ||||||||
| STRS JV | STRS JV Credit Facility | SOFR | ||||||||||
| Schedule of Investments [Line Items] | ||||||||||
| Variable interest rate (as a percent) | 2.50% | 2.50% | ||||||||
| Borrowings greater than | $ 175,000,000 | |||||||||
| STRS JV | STRS JV Credit Facility | CDOR | ||||||||||
| Schedule of Investments [Line Items] | ||||||||||
| Maximum borrowing limit | $ 175,000,000 | $ 2.35 | ||||||||
| Variable interest rate (as a percent) | 2.35% | |||||||||
| STRS JV | Subordinated Notes | ||||||||||
| Schedule of Investments [Line Items] | ||||||||||
| Investment commitment in joint venture | $ 80,000,000 | |||||||||
| Cost of investment | $ 80,000,000 | 60,000,000 | ||||||||
| STRS JV | Equity (excluding STRS JV) | ||||||||||
| Schedule of Investments [Line Items] | ||||||||||
| Investment commitment in joint venture | $ 20,000,000 | |||||||||
| Cost of investment | $ 20,000,000 | $ 15,000,000 | ||||||||
| STRS JV | STRS Ohio | ||||||||||
| Schedule of Investments [Line Items] | ||||||||||
| Investment commitment in joint venture | $ 50,000,000 | |||||||||
| Economic ownership (as a percent) | 33.33% | 33.33% | 40% |
INVESTMENTS - STRS JVs individu
| INVESTMENTS - STRS JVs individual Investments (Details) € in Thousands, £ in Thousands, $ in Thousands, $ in Thousands | 12 Months Ended | ||||||||
| Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2022 CAD ($) | Dec. 31, 2022 EUR (€) | Dec. 31, 2022 GBP (£) | Dec. 31, 2021 CAD ($) | Dec. 31, 2021 EUR (€) | Dec. 31, 2021 GBP (£) | Dec. 31, 2020 USD ($) | |
| Schedule of Investments [Line Items] | |||||||||
| Investment Owned, at Cost | $ 782,429 | $ 831,960 | |||||||
| Investment Owned, at Fair Value | $ 760,228 | 819,208 | |||||||
| Investment, Interest Rate, Paid in Kind | 12.17% | 12.17% | 12.17% | 12.17% | |||||
| STRS JV | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment Owned, at Cost | $ 287,940 | 260,472 | |||||||
| Investment Owned, at Fair Value | $ 284,259 | $ 259,510 | |||||||
| Investment, Interest Rate, Paid in Kind | 7% | 7% | 7% | 7% | |||||
| Fair Value As A Percentage of Member's Equity | 940.04% | 997.65% | |||||||
| Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 735,943 | $ 794,969 | |||||||
| Investment Owned, at Fair Value | $ 719,068 | $ 781,049 | |||||||
| Advertising | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment Owned, at Cost | $ 11,760 | ||||||||
| Investment Owned, at Fair Value | $ 11,703 | ||||||||
| Fair Value As A Percentage of Member's Equity | 38.70% | ||||||||
| Advertising | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment Owned, at Cost | $ 9,490 | ||||||||
| Investment Owned, at Fair Value | $ 9,488 | ||||||||
| Air Freight & Logistics | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment Owned, at Cost | $ 3,523 | ||||||||
| Investment Owned, at Fair Value | $ 3,545 | ||||||||
| Fair Value As A Percentage of Member's Equity | 11.72% | ||||||||
| Air Freight & Logistics | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 15,819 | $ 20,021 | |||||||
| Investment Owned, at Fair Value | $ 15,590 | $ 20,129 | |||||||
| Application Software | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 13,162 | $ 13,247 | |||||||
| Investment Owned, at Fair Value | $ 13,375 | $ 13,518 | |||||||
| Fair Value As A Percentage of Member's Equity | 44.23% | 51.97% | |||||||
| Application Software | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 29,947 | $ 22,460 | |||||||
| Investment Owned, at Fair Value | $ 27,117 | $ 22,590 | |||||||
| Building Products | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 14,105 | $ 16,441 | |||||||
| Investment Owned, at Fair Value | $ 14,132 | $ 16,603 | |||||||
| Fair Value As A Percentage of Member's Equity | 46.73% | 63.83% | |||||||
| Building Products | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 25,182 | $ 43,653 | |||||||
| Investment Owned, at Fair Value | $ 23,576 | $ 43,757 | |||||||
| Construction & Engineering | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 8,522 | $ 13,626 | |||||||
| Investment Owned, at Fair Value | $ 8,432 | $ 13,975 | |||||||
| Fair Value As A Percentage of Member's Equity | 27.88% | 53.73% | |||||||
| Construction & Engineering | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment Owned, at Cost | $ 10,814 | ||||||||
| Investment Owned, at Fair Value | $ 11,086 | ||||||||
| Data Processing & Outsourced Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 15,413 | $ 15,766 | |||||||
| Investment Owned, at Fair Value | $ 14,536 | $ 16,160 | |||||||
| Fair Value As A Percentage of Member's Equity | 48.07% | 62.13% | |||||||
| Data Processing & Outsourced Services | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 22,776 | $ 31,301 | |||||||
| Investment Owned, at Fair Value | $ 22,817 | $ 31,971 | |||||||
| Diversified Support Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 12,192 | $ 12,773 | |||||||
| Investment Owned, at Fair Value | $ 11,729 | $ 10,489 | |||||||
| Fair Value As A Percentage of Member's Equity | 38.79% | 40.32% | |||||||
| Diversified Support Services | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 11,199 | $ 11,459 | |||||||
| Investment Owned, at Fair Value | $ 10,833 | $ 11,460 | |||||||
| Electronic Equipment & Instruments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 13,284 | $ 6,680 | |||||||
| Investment Owned, at Fair Value | $ 13,187 | $ 6,687 | |||||||
| Fair Value As A Percentage of Member's Equity | 43.61% | 25.71% | |||||||
| Electronic Equipment & Instruments | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment Owned, at Cost | $ 6,684 | ||||||||
| Investment Owned, at Fair Value | $ 6,687 | ||||||||
| Environmental & Facilities Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 20,725 | $ 6,780 | |||||||
| Investment Owned, at Fair Value | $ 20,708 | $ 6,872 | |||||||
| Fair Value As A Percentage of Member's Equity | 68.48% | 26.42% | |||||||
| Environmental & Facilities Services | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 18,031 | $ 32,174 | |||||||
| Investment Owned, at Fair Value | $ 17,859 | $ 32,173 | |||||||
| Household Appliances | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment Owned, at Cost | $ 7,859 | ||||||||
| Investment Owned, at Fair Value | $ 7,885 | ||||||||
| Fair Value As A Percentage of Member's Equity | 26.08% | ||||||||
| Household Appliances | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment Owned, at Cost | $ 6,680 | ||||||||
| Investment Owned, at Fair Value | $ 6,615 | ||||||||
| Industrial Machinery | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 15,145 | $ 6,727 | |||||||
| Investment Owned, at Fair Value | $ 14,999 | $ 6,815 | |||||||
| Fair Value As A Percentage of Member's Equity | 49.60% | 26.20% | |||||||
| Industrial Machinery | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment Owned, at Cost | $ 9,633 | ||||||||
| Investment Owned, at Fair Value | $ 9,360 | ||||||||
| Internet & Direct Marketing Retail | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 18,920 | $ 15,153 | |||||||
| Investment Owned, at Fair Value | $ 19,113 | $ 15,353 | |||||||
| Fair Value As A Percentage of Member's Equity | 63.21% | 59.02% | |||||||
| Internet & Direct Marketing Retail | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 35,005 | $ 41,910 | |||||||
| Investment Owned, at Fair Value | $ 35,073 | $ 42,440 | |||||||
| Investment Banking & Brokerage | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 5,507 | $ 9,943 | |||||||
| Investment Owned, at Fair Value | $ 5,545 | $ 10,054 | |||||||
| Fair Value As A Percentage of Member's Equity | 18.34% | 38.65% | |||||||
| Investment Banking & Brokerage | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 11,833 | $ 12,674 | |||||||
| Investment Owned, at Fair Value | $ 11,860 | $ 12,729 | |||||||
| IT Consulting And Other Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 34,184 | $ 40,384 | |||||||
| Investment Owned, at Fair Value | $ 33,461 | $ 40,697 | |||||||
| Fair Value As A Percentage of Member's Equity | 110.66% | 156.45% | |||||||
| IT Consulting And Other Services | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 13,620 | $ 17,679 | |||||||
| Investment Owned, at Fair Value | $ 13,487 | $ 17,694 | |||||||
| Leisure Products | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment Owned, at Cost | $ 8,931 | ||||||||
| Investment Owned, at Fair Value | $ 8,930 | ||||||||
| Fair Value As A Percentage of Member's Equity | 34.33% | ||||||||
| Leisure Products | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 14,055 | $ 6,115 | |||||||
| Investment Owned, at Fair Value | $ 13,366 | $ 3,072 | |||||||
| Packaged Foods & Meats | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 12,312 | $ 26,802 | |||||||
| Investment Owned, at Fair Value | $ 12,069 | $ 25,606 | |||||||
| Fair Value As A Percentage of Member's Equity | 39.91% | 98.44% | |||||||
| Packaged Foods & Meats | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 11,198 | $ 11,084 | |||||||
| Investment Owned, at Fair Value | $ 10,941 | $ 10,862 | |||||||
| Paper Packaging | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment Owned, at Cost | $ 8,085 | ||||||||
| Investment Owned, at Fair Value | $ 8,059 | ||||||||
| Fair Value As A Percentage of Member's Equity | 26.65% | ||||||||
| Personal Products | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 3,895 | $ 4,185 | |||||||
| Investment Owned, at Fair Value | $ 3,949 | $ 4,273 | |||||||
| Fair Value As A Percentage of Member's Equity | 13.06% | 16.43% | |||||||
| Personal Products | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 13,694 | $ 12,055 | |||||||
| Investment Owned, at Fair Value | $ 13,482 | $ 12,260 | |||||||
| Pharmaceuticals | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 15,487 | $ 14,955 | |||||||
| Investment Owned, at Fair Value | $ 14,712 | $ 15,061 | |||||||
| Fair Value As A Percentage of Member's Equity | 48.65% | 57.90% | |||||||
| Real Estate Operating Companies | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 11,246 | $ 4,781 | |||||||
| Investment Owned, at Fair Value | $ 11,121 | $ 4,780 | |||||||
| Fair Value As A Percentage of Member's Equity | 36.78% | 18.38% | |||||||
| Real Estate Operating Companies | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 5,309 | $ 5,425 | |||||||
| Investment Owned, at Fair Value | $ 5,309 | $ 5,431 | |||||||
| Real Estate Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment Owned, at Cost | $ 9,063 | ||||||||
| Investment Owned, at Fair Value | $ 8,548 | ||||||||
| Fair Value As A Percentage of Member's Equity | 28.27% | ||||||||
| Research & Consulting Services | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 8,782 | $ 8,852 | |||||||
| Investment Owned, at Fair Value | $ 8,686 | $ 8,901 | |||||||
| Fair Value As A Percentage of Member's Equity | 28.72% | 34.22% | |||||||
| Research & Consulting Services | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 22,050 | $ 23,987 | |||||||
| Investment Owned, at Fair Value | $ 21,896 | $ 23,822 | |||||||
| Systems Software | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment Owned, at Cost | $ 9,801 | ||||||||
| Investment Owned, at Fair Value | $ 9,898 | ||||||||
| Fair Value As A Percentage of Member's Equity | 38.05% | ||||||||
| Systems Software | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 19,353 | $ 19,018 | |||||||
| Investment Owned, at Fair Value | $ 17,847 | $ 19,160 | |||||||
| Technology Hardware, Storage & Peripherals | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 14,874 | $ 14,694 | |||||||
| Investment Owned, at Fair Value | $ 14,884 | $ 14,725 | |||||||
| Fair Value As A Percentage of Member's Equity | 49.22% | 56.61% | |||||||
| Technology Hardware, Storage & Peripherals | Debt Investments | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 16,466 | $ 22,717 | |||||||
| Investment Owned, at Fair Value | $ 16,693 | $ 23,117 | |||||||
| Trading Companies & Distributors | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment Owned, at Cost | $ 9,895 | $ 9,951 | |||||||
| Investment Owned, at Fair Value | $ 9,881 | $ 10,113 | |||||||
| Fair Value As A Percentage of Member's Equity | 32.68% | 38.88% | |||||||
| Investment, Identifier [Axis]: ABB/Con-cise Optical Group LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ABBCon-ciseOpticalGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Supplies [Member] | Health Care Supplies [Member] | Health Care Supplies [Member] | Health Care Supplies [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | |||||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||||
| Investment, Basis Spread, Variable Rate | 6.51% | 6.51% | 6.51% | 6.51% | |||||
| Investment Interest Rate | 13.98% | 13.98% | 13.98% | 13.98% | |||||
| Investment, Acquisition Date | Feb. 23, 2022 | ||||||||
| Investment Maturity Date | Feb. 23, 2028 | Feb. 23, 2028 | Feb. 23, 2028 | Feb. 23, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 2,151 | ||||||||
| Investment Owned, at Cost | 2,105 | ||||||||
| Investment Owned, at Fair Value | $ 2,093 | ||||||||
| Investment, Identifier [Axis]: ABB/Con-cise Optical Group LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ABBCon-ciseOpticalGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Supplies [Member] | Health Care Supplies [Member] | Health Care Supplies [Member] | Health Care Supplies [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||||
| Investment, Basis Spread, Variable Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment Interest Rate | 12.67% | 12.67% | 12.67% | 12.67% | |||||
| Investment, Acquisition Date | Feb. 23, 2022 | ||||||||
| Investment Maturity Date | Feb. 23, 2028 | Feb. 23, 2028 | Feb. 23, 2028 | Feb. 23, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 21,573 | ||||||||
| Investment Owned, at Cost | 21,110 | ||||||||
| Investment Owned, at Fair Value | $ 20,997 | ||||||||
| Investment, Identifier [Axis]: ALM Media, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ALMMediaLLCMember | whf:ALMMediaLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.50% | 7% | 6.50% | 6.50% | 6.50% | 7% | 7% | 7% | |
| Investment Interest Rate | 10.91% | 8% | 10.91% | 10.91% | 10.91% | 8% | 8% | 8% | |
| Investment, Acquisition Date | Nov. 25, 2019 | Nov. 25, 2019 | |||||||
| Investment Maturity Date | Nov. 25, 2024 | Nov. 25, 2024 | Nov. 25, 2024 | Nov. 25, 2024 | Nov. 25, 2024 | Nov. 25, 2024 | Nov. 25, 2024 | Nov. 25, 2024 | |
| Investment Owned, Balance, Principal Amount | $ 13,388 | $ 14,175 | |||||||
| Investment Owned, at Cost | 13,286 | 14,011 | |||||||
| Investment Owned, at Fair Value | $ 13,255 | $ 13,996 | |||||||
| Investment, Identifier [Axis]: AST Applications Software Technology LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ASTApplicationsSoftwareTechnologyLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 8% | 8% | 8% | 8% | |||||
| Investment Interest Rate | 9% | 9% | 9% | 9% | |||||
| Investment, Acquisition Date | Jan. 10, 2017 | ||||||||
| Investment Maturity Date | Jan. 10, 2023 | Jan. 10, 2023 | Jan. 10, 2023 | Jan. 10, 2023 | |||||
| Investment Owned, Balance, Principal Amount | $ 3,958 | ||||||||
| Investment Owned, at Cost | 3,943 | ||||||||
| Investment Owned, at Fair Value | $ 3,958 | ||||||||
| Investment, Interest Rate, Paid in Kind | 1% | 1% | 1% | 1% | |||||
| Investment, Interest Rate, Paid in Cash | 8% | 8% | 8% | 8% | |||||
| Investment, Identifier [Axis]: ATSG Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ATSGIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 11.14% | 11.14% | 11.14% | 11.14% | |||||
| Investment, Acquisition Date | Nov. 12, 2021 | ||||||||
| Investment Maturity Date | Nov. 12, 2026 | Nov. 12, 2026 | Nov. 12, 2026 | Nov. 12, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 13,833 | ||||||||
| Investment Owned, at Cost | 13,620 | ||||||||
| Investment Owned, at Fair Value | $ 13,487 | ||||||||
| Investment, Identifier [Axis]: ATSG, First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ATSGIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | Nov. 12, 2021 | ||||||||
| Investment Maturity Date | Nov. 12, 2026 | Nov. 12, 2026 | Nov. 12, 2026 | Nov. 12, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 14,008 | ||||||||
| Investment Owned, at Cost | 13,736 | ||||||||
| Investment Owned, at Fair Value | $ 13,736 | ||||||||
| Investment, Identifier [Axis]: Access USA Shipping, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:AccessUSAShippingLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Investment, Basis Spread, Variable Rate | 8% | 8% | 8% | 8% | |||||
| Investment Interest Rate | 9.50% | 9.50% | 9.50% | 9.50% | |||||
| Investment, Acquisition Date | Feb. 08, 2019 | ||||||||
| Investment Maturity Date | Feb. 08, 2024 | Feb. 08, 2024 | Feb. 08, 2024 | Feb. 08, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 4,937 | ||||||||
| Investment Owned, at Cost | 4,906 | ||||||||
| Investment Owned, at Fair Value | $ 4,937 | ||||||||
| Investment, Identifier [Axis]: Aeyon LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:AeyonLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 8.88% | 8.88% | 8.88% | 8.88% | |||||
| Investment Interest Rate | 13.19% | 13.19% | 13.19% | 13.19% | |||||
| Investment, Acquisition Date | Feb. 10, 2022 | ||||||||
| Investment Maturity Date | Feb. 10, 2027 | Feb. 10, 2027 | Feb. 10, 2027 | Feb. 10, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 8,910 | ||||||||
| Investment Owned, at Cost | 8,764 | ||||||||
| Investment Owned, at Fair Value | $ 8,641 | ||||||||
| Investment, Identifier [Axis]: American Crafts Holdings, LLC, Warrants | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:AmericanCraftsLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | |||||
| Investment, Acquisition Date | Dec. 22, 2022 | ||||||||
| Investment Maturity Date | Dec. 22, 2032 | Dec. 22, 2032 | Dec. 22, 2032 | Dec. 22, 2032 | |||||
| Investment, Identifier [Axis]: American Crafts, LC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:AmericanCraftsLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 8.50% | 8.50% | 8.50% | 8.50% | |||||
| Investment Interest Rate | 12.88% | 12.88% | 12.88% | 12.88% | |||||
| Investment, Acquisition Date | Oct. 01, 2022 | ||||||||
| Investment Maturity Date | May 28, 2026 | May 28, 2026 | May 28, 2026 | May 28, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 1,367 | ||||||||
| Investment Owned, at Cost | 1,346 | ||||||||
| Investment Owned, at Fair Value | $ 1,147 | ||||||||
| Investment, Identifier [Axis]: American Crafts, LC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:AmericanCraftsLCMember | whf:AmericanCraftsLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 8.50% | 8.50% | 8.50% | 8.50% | 8.50% | 8.50% | 8.50% | 8.50% | |
| Investment Interest Rate | 12.88% | 9.50% | 12.88% | 12.88% | 12.88% | 9.50% | 9.50% | 9.50% | |
| Investment, Acquisition Date | May 28, 2021 | May 28, 2021 | |||||||
| Investment Maturity Date | May 28, 2026 | May 28, 2026 | May 28, 2026 | May 28, 2026 | May 28, 2026 | May 28, 2026 | May 28, 2026 | May 28, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 9,555 | $ 8,434 | |||||||
| Investment Owned, at Cost | 9,473 | 8,325 | |||||||
| Investment Owned, at Fair Value | $ 8,244 | $ 8,325 | |||||||
| Investment, Identifier [Axis]: Arcole Holding Corporation Shares | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ArcoleHoldingCorporationMember | whf:ArcoleHoldingCorporationMember | |||||||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | |
| Investment, Acquisition Date | Oct. 01, 2020 | Oct. 01, 2020 | |||||||
| Investment Owned, at Cost | $ 6,944 | $ 6,944 | |||||||
| Investment Owned, at Fair Value | $ 6,380 | $ 6,874 | |||||||
| Investment, Identifier [Axis]: Arcole Holding Corporation, Equity | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ArcoleHoldingCorporationMember | ||||||||
| Investment, Type [Extensible Enumeration] | Equity Investments | Equity Investments | Equity Investments | Equity Investments | |||||
| Investment Owned, at Fair Value | $ 6,874 | $ 6,448 | |||||||
| Investment, Identifier [Axis]: Arcstor Midco, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ArcstorMidcoLLCMember | whf:ArcstorMidcoLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | Systems Software | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 7.50% | 7% | 7.50% | 7.50% | 7.50% | 7% | 7% | 7% | |
| Investment Interest Rate | 11.92% | 8% | 11.92% | 11.92% | 11.92% | 8% | 8% | 8% | |
| Investment, Acquisition Date | Mar. 16, 2021 | Mar. 16, 2021 | |||||||
| Investment Maturity Date | Mar. 16, 2027 | Mar. 16, 2027 | Mar. 16, 2027 | Mar. 16, 2027 | Mar. 16, 2027 | Mar. 16, 2027 | Mar. 16, 2027 | Mar. 16, 2027 | |
| Investment Owned, Balance, Principal Amount | $ 19,623 | $ 19,354 | |||||||
| Investment Owned, at Cost | 19,353 | 19,018 | |||||||
| Investment Owned, at Fair Value | $ 17,847 | $ 19,160 | |||||||
| Investment, Interest Rate, Paid in Kind | 3.75% | 3.75% | 3.75% | 3.75% | |||||
| Investment, Interest Rate, Paid in Cash | 8.17% | 8.17% | 8.17% | 8.17% | |||||
| Investment, Identifier [Axis]: Atlas Purchaser, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:AtlasPurchaserIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||||
| Investment, Basis Spread, Variable Rate | 5.25% | 9% | 5.25% | 5.25% | 5.25% | 9% | 9% | 9% | |
| Investment Interest Rate | 8.68% | 8.68% | 8.68% | 8.68% | |||||
| Investment, Acquisition Date | Aug. 29, 2022 | ||||||||
| Investment Maturity Date | May 08, 2028 | May 08, 2028 | May 08, 2028 | May 08, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 3,097 | ||||||||
| Investment Owned, at Cost | 2,611 | ||||||||
| Investment Owned, at Fair Value | $ 2,556 | ||||||||
| Investment, Identifier [Axis]: Atlas Purchaser, Inc Second Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:AtlasPurchaserIncMember | whf:AtlasPurchaserIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | |
| Investment, Basis Spread, Variable Rate | 9% | 9% | 9% | 9% | |||||
| Investment Interest Rate | 14.20% | 9.75% | 14.20% | 14.20% | 14.20% | 9.75% | 9.75% | 9.75% | |
| Investment, Acquisition Date | May 03, 2021 | May 03, 2021 | |||||||
| Investment Maturity Date | May 07, 2029 | May 07, 2029 | May 07, 2029 | May 07, 2029 | May 07, 2029 | May 07, 2029 | May 07, 2029 | May 07, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 15,000 | $ 15,000 | |||||||
| Investment Owned, at Cost | 14,642 | 14,586 | |||||||
| Investment Owned, at Fair Value | $ 11,969 | $ 14,700 | |||||||
| Investment, Identifier [Axis]: Avision Holdings, LLC Class A LLC Interests | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:AvisionHoldingsLLCMember | Telestream Holdings Corporation [Member] | |||||||
| Investment, Type [Extensible Enumeration] | whf:ClassALLCInterestsMember | whf:ClassALLCInterestsMember | whf:ClassALLCInterestsMember | whf:ClassALLCInterestsMember | whf:ClassALLCInterestsMember | whf:ClassALLCInterestsMember | whf:ClassALLCInterestsMember | whf:ClassALLCInterestsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | Advertising | Advertising | Advertising | Advertising | |
| Investment, Acquisition Date | Dec. 15, 2021 | Dec. 15, 2021 | |||||||
| Investment Owned, Balance, Principal Amount | $ 208 | $ 200 | |||||||
| Investment Owned, at Cost | 258 | 250 | |||||||
| Investment Owned, at Fair Value | $ 154 | $ 250 | |||||||
| Investment, Identifier [Axis]: BBQ Buyer, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:BBQBuyerLLCMember | whf:BBQBuyerLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | |
| Investment, Basis Spread, Variable Rate | 9% | 9% | 9% | 9% | |||||
| Investment Interest Rate | 13.38% | 11.50% | 13.38% | 13.38% | 13.38% | 11.50% | 11.50% | 11.50% | |
| Investment, Acquisition Date | Apr. 29, 2022 | Dec. 02, 2021 | |||||||
| Investment Maturity Date | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 2,593 | $ 2,573 | |||||||
| Investment Owned, at Cost | 2,557 | 2,523 | |||||||
| Investment Owned, at Fair Value | $ 2,541 | $ 2,523 | |||||||
| Investment, Interest Rate, Paid in Kind | 1% | 2% | 1% | 1% | 1% | 2% | 2% | 2% | |
| Investment, Interest Rate, Paid in Cash | 12.38% | 9.50% | 12.38% | 12.38% | 12.38% | 9.50% | 9.50% | 9.50% | |
| Investment, Identifier [Axis]: BBQ Buyer, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:BBQBuyerLLCMember | whf:BBQBuyerLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | |
| Investment, Basis Spread, Variable Rate | 9% | 10% | 9% | 9% | 9% | 10% | 10% | 10% | |
| Investment Interest Rate | 13.38% | 11.50% | 13.38% | 13.38% | 13.38% | 11.50% | 11.50% | 11.50% | |
| Investment, Acquisition Date | Aug. 28, 2020 | Aug. 28, 2020 | |||||||
| Investment Maturity Date | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | Aug. 28, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 12,720 | $ 12,623 | |||||||
| Investment Owned, at Cost | 12,550 | 12,388 | |||||||
| Investment Owned, at Fair Value | $ 12,465 | $ 12,623 | |||||||
| Investment, Interest Rate, Paid in Kind | 1% | 2% | 1% | 1% | 1% | 2% | 2% | 2% | |
| Investment, Interest Rate, Paid in Cash | 12.38% | 9.50% | 12.38% | 12.38% | 12.38% | 9.50% | 9.50% | 9.50% | |
| Investment, Identifier [Axis]: BBQ Buyer, LLC Shares | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:BBQBuyerLLCMember | whf:BBQBuyerLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |
| Investment, Acquisition Date | Aug. 28, 2020 | Aug. 28, 2020 | |||||||
| Investment Owned, Balance, Principal Amount | $ 1,100 | $ 1,100 | |||||||
| Investment Owned, at Cost | 1,100 | 1,100 | |||||||
| Investment Owned, at Fair Value | $ 1,404 | $ 2,442 | |||||||
| Investment, Identifier [Axis]: BL Products Parent, LP Class A Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:BLProductsParentLPMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery | Industrial Machinery | Industrial Machinery | Industrial Machinery | |||||
| Investment, Acquisition Date | Feb. 01, 2022 | ||||||||
| Investment Owned, Balance, Principal Amount | $ 667 | ||||||||
| Investment Owned, at Cost | 667 | ||||||||
| Investment Owned, at Fair Value | $ 514 | ||||||||
| Investment, Identifier [Axis]: BLP Buyer, Inc. First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:BLProductsParentLPMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery | Industrial Machinery | Industrial Machinery | Industrial Machinery | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.25% | 1.25% | 1.25% | 1.25% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.21% | 10.21% | 10.21% | 10.21% | |||||
| Investment, Acquisition Date | Oct. 03, 2022 | ||||||||
| Investment Maturity Date | Feb. 01, 2027 | Feb. 01, 2027 | Feb. 01, 2027 | Feb. 01, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 2,149 | ||||||||
| Investment Owned, at Cost | 2,098 | ||||||||
| Investment Owned, at Fair Value | $ 2,091 | ||||||||
| Investment, Identifier [Axis]: BLP Buyer., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF plus 6.25%, Rate 10.67%, Due 2/1/28 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SmaltoInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery | Industrial Machinery | Industrial Machinery | Industrial Machinery | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 10.67% | 10.67% | 10.67% | 10.67% | |||||
| Investment, Acquisition Date | Feb. 18, 2022 | ||||||||
| Investment Maturity Date | Feb. 01, 2027 | Feb. 01, 2027 | Feb. 01, 2027 | Feb. 01, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 274 | ||||||||
| Investment Owned, at Cost | 270 | ||||||||
| Investment Owned, at Fair Value | $ 259 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.86% | ||||||||
| Investment, Identifier [Axis]: BLP Buyer., First Lien Secured Term Loan, Floor 1.25%, Spread SF plus 6.25%, Rate 10.49%, Due 2/1/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SmaltoInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery | Industrial Machinery | Industrial Machinery | Industrial Machinery | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.25% | 1.25% | 1.25% | 1.25% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 10.49% | 10.49% | 10.49% | 10.49% | |||||
| Investment, Acquisition Date | Feb. 18, 2022 | ||||||||
| Investment Maturity Date | Feb. 01, 2027 | Feb. 01, 2027 | Feb. 01, 2027 | Feb. 01, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 8,188 | ||||||||
| Investment Owned, at Cost | 8,054 | ||||||||
| Investment Owned, at Fair Value | $ 7,939 | ||||||||
| Fair Value As A Percentage of Member's Equity | 26.25% | ||||||||
| Investment, Identifier [Axis]: BPII-JL Group Holdings LP Class A Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:BPII-JLGroupHoldingsLPMember | whf:BPII-JLGroupHoldingsLPMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Investment, Acquisition Date | Dec. 29, 2021 | Dec. 29, 2021 | |||||||
| Investment Owned, Balance, Principal Amount | $ 83 | $ 83 | |||||||
| Investment Owned, at Cost | 825 | 825 | |||||||
| Investment Owned, at Fair Value | $ 600 | $ 825 | |||||||
| Investment, Identifier [Axis]: Bridgepoint Healthcare, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:BridgepointHealthcareLLCMember | whf:BridgepointHealthcareLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | |
| Investment Interest Rate | 12.04% | 8.75% | 12.04% | 12.04% | 12.04% | 8.75% | 8.75% | 8.75% | |
| Investment, Acquisition Date | Oct. 05, 2021 | Oct. 05, 2021 | |||||||
| Investment Maturity Date | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | |
| Investment Owned, at Fair Value | $ (14) | ||||||||
| Investment, Identifier [Axis]: Bridgepoint Healthcare, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:BridgepointHealthcareLLCMember | whf:BridgepointHealthcareLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | |
| Investment Interest Rate | 12.04% | 8.75% | 12.04% | 12.04% | 12.04% | 8.75% | 8.75% | 8.75% | |
| Investment, Acquisition Date | Oct. 05, 2021 | Oct. 05, 2021 | |||||||
| Investment Maturity Date | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | |
| Investment Owned, at Fair Value | $ (16) | ||||||||
| Investment, Identifier [Axis]: Bridgepoint Healthcare, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:BridgepointHealthcareLLCMember | whf:BridgepointHealthcareLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | 7.75% | |
| Investment Interest Rate | 12.04% | 8.75% | 12.04% | 12.04% | 12.04% | 8.75% | 8.75% | 8.75% | |
| Investment, Acquisition Date | Oct. 05, 2021 | Oct. 05, 2021 | |||||||
| Investment Maturity Date | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | Oct. 05, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 10,423 | $ 10,979 | |||||||
| Investment Owned, at Cost | 10,266 | 10,770 | |||||||
| Investment Owned, at Fair Value | $ 10,161 | $ 10,769 | |||||||
| Investment, Identifier [Axis]: Bulk Midco, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:BulkMidcoLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Cable And Satellite [Member] | Cable And Satellite [Member] | Cable And Satellite [Member] | Cable And Satellite [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment Interest Rate | 11.64% | 11.64% | 11.64% | 11.64% | |||||
| Investment, Acquisition Date | Oct. 28, 2022 | ||||||||
| Investment Maturity Date | Jun. 10, 2024 | Jun. 10, 2024 | Jun. 10, 2024 | Jun. 10, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 2,000 | ||||||||
| Investment Owned, at Cost | 1,963 | ||||||||
| Investment Owned, at Fair Value | $ 1,964 | ||||||||
| Investment, Interest Rate, Paid in Kind | 1% | 1% | 1% | 1% | |||||
| Investment, Interest Rate, Paid in Cash | 10.64% | 10.64% | 10.64% | 10.64% | |||||
| Investment, Identifier [Axis]: Bulk Midco, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:BulkMidcoLLCMember | whf:BulkMidcoLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Cable And Satellite [Member] | Cable And Satellite [Member] | Cable And Satellite [Member] | Cable And Satellite [Member] | Cable And Satellite [Member] | Cable And Satellite [Member] | Cable And Satellite [Member] | Cable And Satellite [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 7.50% | 7.24% | 7.50% | 7.50% | 7.50% | 7.24% | 7.24% | 7.24% | |
| Investment Interest Rate | 11.64% | 8.24% | 11.64% | 11.64% | 11.64% | 8.24% | 8.24% | 8.24% | |
| Investment, Acquisition Date | Oct. 28, 2022 | Jun. 08, 2018 | |||||||
| Investment Maturity Date | Jun. 10, 2024 | Jun. 08, 2023 | Jun. 10, 2024 | Jun. 10, 2024 | Jun. 10, 2024 | Jun. 08, 2023 | Jun. 08, 2023 | Jun. 08, 2023 | |
| Investment Owned, Balance, Principal Amount | $ 19,228 | $ 15,000 | |||||||
| Investment Owned, at Cost | 19,126 | 14,936 | |||||||
| Investment Owned, at Fair Value | $ 18,525 | $ 14,526 | |||||||
| Investment, Identifier [Axis]: CHS Therapy, LLC First Lien Secured Term Loan A | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CHSTherapyLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Investment, Basis Spread, Variable Rate | 9% | 9% | 9% | 9% | |||||
| Investment Interest Rate | 10.50% | 10.50% | 10.50% | 10.50% | |||||
| Investment, Acquisition Date | Jun. 14, 2019 | ||||||||
| Investment Maturity Date | Jun. 14, 2024 | Jun. 14, 2024 | Jun. 14, 2024 | Jun. 14, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 7,242 | ||||||||
| Investment Owned, at Cost | 7,175 | ||||||||
| Investment Owned, at Fair Value | $ 7,242 | ||||||||
| Investment, Interest Rate, Paid in Kind | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Investment, Interest Rate, Paid in Cash | 10% | 10% | 10% | 10% | |||||
| Investment, Identifier [Axis]: CHS Therapy, LLC First Lien Secured Term Loan C | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CHSTherapyLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Investment, Basis Spread, Variable Rate | 9% | 9% | 9% | 9% | |||||
| Investment Interest Rate | 10.50% | 10.50% | 10.50% | 10.50% | |||||
| Investment, Acquisition Date | Oct. 07, 2020 | ||||||||
| Investment Maturity Date | Jun. 14, 2024 | Jun. 14, 2024 | Jun. 14, 2024 | Jun. 14, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 891 | ||||||||
| Investment Owned, at Cost | 879 | ||||||||
| Investment Owned, at Fair Value | $ 891 | ||||||||
| Investment, Interest Rate, Paid in Kind | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Investment, Interest Rate, Paid in Cash | 10% | 10% | 10% | 10% | |||||
| Investment, Identifier [Axis]: CX Holdco LLC Common Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CXHoldcoLLCMember | whf:CXHoldcoLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |
| Investment, Acquisition Date | May 04, 2021 | May 04, 2021 | |||||||
| Investment Owned, Balance, Principal Amount | $ 1,068 | $ 972 | |||||||
| Investment Owned, at Cost | 1,116 | 972 | |||||||
| Investment Owned, at Fair Value | $ 1,558 | $ 972 | |||||||
| Investment, Identifier [Axis]: Camp Facility Services Holdings, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CampFacilityServicesHoldingsLLCMember | whf:CampFacilityServicesHoldingsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Research & Consulting Services | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Investment Interest Rate | 10.89% | 7.50% | 10.89% | 10.89% | 10.89% | 7.50% | 7.50% | 7.50% | |
| Investment, Acquisition Date | Nov. 16, 2021 | Nov. 16, 2021 | |||||||
| Investment Maturity Date | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | |
| Investment Owned, at Fair Value | $ (96) | $ (1) | |||||||
| Investment, Identifier [Axis]: Camp Facility Services Holdings, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CampFacilityServicesHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | Nov. 16, 2021 | ||||||||
| Investment Maturity Date | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | |||||
| Investment, Identifier [Axis]: Camp Facility Services Holdings, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CampFacilityServicesHoldingsLLCMember | whf:CampFacilityServicesHoldingsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Research & Consulting Services | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Investment Interest Rate | 10.89% | 7.50% | 10.89% | 10.89% | 10.89% | 7.50% | 7.50% | 7.50% | |
| Investment, Acquisition Date | Nov. 16, 2021 | Nov. 16, 2021 | |||||||
| Investment Maturity Date | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | Nov. 16, 2027 | |
| Investment Owned, Balance, Principal Amount | $ 11,798 | $ 13,000 | |||||||
| Investment Owned, at Cost | 11,606 | 12,745 | |||||||
| Investment Owned, at Fair Value | $ 11,326 | $ 12,742 | |||||||
| Investment, Identifier [Axis]: Camp Facility Services Parent, LLC Preferred Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CampFacilityServicesParentLLCMember | whf:CampFacilityServicesParentLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | |
| Investment, Basis Spread, Variable Rate | 10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% | |
| Investment, Acquisition Date | Nov. 16, 2021 | Nov. 16, 2021 | |||||||
| Investment Owned, Balance, Principal Amount | $ 15 | $ 15 | |||||||
| Investment Owned, at Cost | 840 | 840 | |||||||
| Investment Owned, at Fair Value | $ 927 | $ 840 | |||||||
| Investment, Interest Rate, Paid in Kind | 10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% | |
| Investment, Identifier [Axis]: Cennox Holdings Limited, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 5/4/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CennoxHoldingsLimitedMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Jul. 16, 2021 | ||||||||
| Investment Maturity Date | May 04, 2026 | May 04, 2026 | May 04, 2026 | May 04, 2026 | |||||
| Investment Owned, Balance, Principal Amount | £ | £ 2,866 | ||||||||
| Investment Owned, at Cost | $ 3,889 | ||||||||
| Investment Owned, at Fair Value | $ 3,877 | ||||||||
| Fair Value As A Percentage of Member's Equity | 14.90% | ||||||||
| Investment, Identifier [Axis]: Cennox Holdings Limited, First lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 5/4/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CennoxHoldingsLimitedMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Jul. 16, 2021 | ||||||||
| Investment Maturity Date | May 04, 2026 | May 04, 2026 | May 04, 2026 | May 04, 2026 | |||||
| Investment Owned, Balance, Principal Amount | £ | £ 864 | ||||||||
| Investment Owned, at Cost | $ 1,173 | ||||||||
| Investment Owned, at Fair Value | $ 1,169 | ||||||||
| Fair Value As A Percentage of Member's Equity | 4.49% | ||||||||
| Investment, Identifier [Axis]: Cennox Holdings Limited., First lien Secured Revolving Loan, Base Rate Floor 1.00%, Spread Rate plus 5.17%, Rate 12.10%, Due 5/4/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CennoxHoldingsLimitedMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 10.99% | 10.99% | 10.99% | 10.99% | |||||
| Investment, Acquisition Date | Jul. 16, 2021 | ||||||||
| Investment Maturity Date | May 04, 2026 | May 04, 2026 | May 04, 2026 | May 04, 2026 | |||||
| Investment Owned, at Fair Value | $ (161) | ||||||||
| Fair Value As A Percentage of Member's Equity | (0.53%) | ||||||||
| Investment, Identifier [Axis]: Cennox Holdings Limited., First lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 10.02%, Due 5/4/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CennoxHoldingsLimitedMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 10.02% | 10.02% | 10.02% | 10.02% | |||||
| Investment, Acquisition Date | Jul. 16, 2021 | ||||||||
| Investment Maturity Date | May 04, 2026 | May 04, 2026 | May 04, 2026 | May 04, 2026 | |||||
| Investment Owned, Balance, Principal Amount | £ | £ 2,837 | ||||||||
| Investment Owned, at Cost | $ 3,863 | ||||||||
| Investment Owned, at Fair Value | $ 3,343 | ||||||||
| Fair Value As A Percentage of Member's Equity | 11.06% | ||||||||
| Investment, Identifier [Axis]: Cennox Holdings Limited., First lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 10.99%, Due 5/4/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CennoxHoldingsLimitedMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 10.99% | 10.99% | 10.99% | 10.99% | |||||
| Investment, Acquisition Date | Jun. 28, 2022 | ||||||||
| Investment Maturity Date | May 04, 2026 | May 04, 2026 | May 04, 2026 | May 04, 2026 | |||||
| Investment Owned, Balance, Principal Amount | € | € 9,458 | ||||||||
| Investment Owned, at Cost | $ 9,834 | ||||||||
| Investment Owned, at Fair Value | $ 9,926 | ||||||||
| Fair Value As A Percentage of Member's Equity | 32.83% | ||||||||
| Investment, Identifier [Axis]: Cennox, Inc., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 5/4/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CennoxInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Jun. 28, 2021 | ||||||||
| Investment Maturity Date | May 04, 2026 | May 04, 2026 | May 04, 2026 | May 04, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 8,915 | ||||||||
| Investment Owned, at Cost | 8,755 | ||||||||
| Investment Owned, at Fair Value | $ 8,915 | ||||||||
| Fair Value As A Percentage of Member's Equity | 34.27% | ||||||||
| Investment, Identifier [Axis]: Cennox, Inc., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 5/4/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CennoxInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Jun. 28, 2021 | ||||||||
| Investment Maturity Date | May 04, 2026 | May 04, 2026 | May 04, 2026 | May 04, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 561 | ||||||||
| Investment Owned, at Cost | 551 | ||||||||
| Investment Owned, at Fair Value | $ 569 | ||||||||
| Fair Value As A Percentage of Member's Equity | 2.19% | ||||||||
| Investment, Identifier [Axis]: Cennox, Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 5/4/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CennoxInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Jun. 28, 2021 | ||||||||
| Investment Maturity Date | May 04, 2026 | May 04, 2026 | May 04, 2026 | May 04, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 8,525 | ||||||||
| Investment Owned, at Cost | 8,365 | ||||||||
| Investment Owned, at Fair Value | $ 8,438 | ||||||||
| Fair Value As A Percentage of Member's Equity | 32.44% | ||||||||
| Investment, Identifier [Axis]: Claridge Products and Equipment, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ClaridgeProductsandEquipmentLLCMember | whf:ClaridgeProductsandEquipmentLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:BaseRateMember | us-gaap:PrimeRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | |
| Investment, Interest Rate, Floor | 1% | 3.25% | 1% | 1% | 1% | 3.25% | 3.25% | 3.25% | |
| Investment, Basis Spread, Variable Rate | 5.88% | 5.50% | 5.88% | 5.88% | 5.88% | 5.50% | 5.50% | 5.50% | |
| Investment Interest Rate | 12.28% | 8.75% | 12.28% | 12.28% | 12.28% | 8.75% | 8.75% | 8.75% | |
| Investment, Acquisition Date | Dec. 30, 2020 | Dec. 30, 2020 | |||||||
| Investment Maturity Date | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 779 | $ 211 | |||||||
| Investment Owned, at Cost | 772 | 207 | |||||||
| Investment Owned, at Fair Value | $ 732 | $ 204 | |||||||
| Investment, Identifier [Axis]: Claridge Products and Equipment, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ClaridgeProductsandEquipmentLLCMember | whf:ClaridgeProductsandEquipmentLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | Construction Materials [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Investment Interest Rate | 11.23% | 7.50% | 11.23% | 11.23% | 11.23% | 7.50% | 7.50% | 7.50% | |
| Investment, Acquisition Date | Dec. 30, 2020 | Dec. 30, 2020 | |||||||
| Investment Maturity Date | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | Dec. 29, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 7,079 | $ 7,640 | |||||||
| Investment Owned, at Cost | 6,994 | 7,518 | |||||||
| Investment Owned, at Fair Value | $ 6,727 | $ 7,469 | |||||||
| Investment, Identifier [Axis]: CleanChoice Energy, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CleanChoiceEnergyIncMember | whf:CleanChoiceEnergyIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Electric Utilities [Member] | Electric Utilities [Member] | Electric Utilities [Member] | Electric Utilities [Member] | Electric Utilities [Member] | Electric Utilities [Member] | Electric Utilities [Member] | Electric Utilities [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | |
| Investment Interest Rate | 11.33% | 8.25% | 11.33% | 11.33% | 11.33% | 8.25% | 8.25% | 8.25% | |
| Investment, Acquisition Date | Oct. 12, 2021 | Oct. 12, 2021 | |||||||
| Investment Maturity Date | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 10,500 | $ 10,500 | |||||||
| Investment Owned, at Cost | 10,341 | 10,299 | |||||||
| Investment Owned, at Fair Value | $ 10,411 | $ 10,296 | |||||||
| Investment, Identifier [Axis]: Coastal Television Broadcasting Group LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CoastalTelevisionBroadcastingGroupLLCMember | whf:CoastalTelevisionBroadcastingGroupLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Broadcasting [Member] | Broadcasting [Member] | Broadcasting [Member] | Broadcasting [Member] | Broadcasting [Member] | Broadcasting [Member] | Broadcasting [Member] | Broadcasting [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Investment Interest Rate | 10.80% | 7.50% | 10.80% | 10.80% | 10.80% | 7.50% | 7.50% | 7.50% | |
| Investment, Acquisition Date | Dec. 30, 2021 | Dec. 30, 2021 | |||||||
| Investment Maturity Date | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | |
| Investment Owned, at Fair Value | $ (5) | ||||||||
| Investment, Identifier [Axis]: Coastal Television Broadcasting Group LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CoastalTelevisionBroadcastingGroupLLCMember | whf:CoastalTelevisionBroadcastingGroupLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Broadcasting [Member] | Broadcasting [Member] | Broadcasting [Member] | Broadcasting [Member] | Broadcasting [Member] | Broadcasting [Member] | Broadcasting [Member] | Broadcasting [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Investment Interest Rate | 10.80% | 7.50% | 10.80% | 10.80% | 10.80% | 7.50% | 7.50% | 7.50% | |
| Investment, Acquisition Date | Dec. 30, 2021 | Dec. 30, 2021 | |||||||
| Investment Maturity Date | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | Dec. 30, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 8,036 | $ 8,191 | |||||||
| Investment Owned, at Cost | 7,908 | 8,027 | |||||||
| Investment Owned, at Fair Value | $ 7,785 | $ 8,027 | |||||||
| Investment, Identifier [Axis]: Crown Brands LLC Second Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CrownBrandsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:SecondLienSecuredDelayedDrawLoanMember | whf:SecondLienSecuredDelayedDrawLoanMember | whf:SecondLienSecuredDelayedDrawLoanMember | whf:SecondLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Distributors [Member] | Distributors [Member] | Distributors [Member] | Distributors [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Investment, Basis Spread, Variable Rate | 10.50% | 10.50% | 10.50% | 10.50% | |||||
| Investment Interest Rate | 12% | 12% | 12% | 12% | |||||
| Investment, Acquisition Date | Dec. 15, 2020 | ||||||||
| Investment Maturity Date | Jan. 08, 2026 | Jan. 08, 2026 | Jan. 08, 2026 | Jan. 08, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 650 | ||||||||
| Investment Owned, at Cost | 650 | ||||||||
| Investment Owned, at Fair Value | $ 520 | ||||||||
| Investment, Identifier [Axis]: Crown Brands LLC Second Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:CrownBrandsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Distributors [Member] | Distributors [Member] | Distributors [Member] | Distributors [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Investment, Basis Spread, Variable Rate | 10.50% | 10.50% | 10.50% | 10.50% | |||||
| Investment Interest Rate | 12% | 12% | 12% | 12% | |||||
| Investment, Acquisition Date | Dec. 15, 2020 | ||||||||
| Investment Maturity Date | Jan. 08, 2026 | Jan. 08, 2026 | Jan. 08, 2026 | Jan. 08, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 4,382 | ||||||||
| Investment Owned, at Cost | 4,299 | ||||||||
| Investment Owned, at Fair Value | $ 3,505 | ||||||||
| Investment, Identifier [Axis]: DCA Investment Holding, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:DCAInvestmentHoldingLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Mar. 12, 2021 | ||||||||
| Investment Maturity Date | Mar. 12, 2027 | Mar. 12, 2027 | Mar. 12, 2027 | Mar. 12, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 678 | ||||||||
| Investment Owned, at Cost | 672 | ||||||||
| Investment Owned, at Fair Value | $ 688 | ||||||||
| Investment, Identifier [Axis]: DCA Investment Holding, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:DCAInvestmentHoldingLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Mar. 12, 2021 | ||||||||
| Investment Maturity Date | Mar. 12, 2027 | Mar. 12, 2027 | Mar. 12, 2027 | Mar. 12, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 7,025 | ||||||||
| Investment Owned, at Cost | 6,933 | ||||||||
| Investment Owned, at Fair Value | $ 6,988 | ||||||||
| Investment, Identifier [Axis]: Drew Foam Companies Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:DrewFoamCompaniesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Nov. 05, 2020 | ||||||||
| Investment Maturity Date | Nov. 05, 2025 | Nov. 05, 2025 | Nov. 05, 2025 | Nov. 05, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 7,207 | ||||||||
| Investment Owned, at Cost | 7,094 | ||||||||
| Investment Owned, at Fair Value | $ 7,183 | ||||||||
| Investment, Identifier [Axis]: Drew Foam Companies Inc First Lien Secured Term Loan Due 11/5/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:DrewFoamCompaniesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment Interest Rate | 11.48% | 11.48% | 11.48% | 11.48% | |||||
| Investment, Acquisition Date | Nov. 09, 2020 | ||||||||
| Investment Maturity Date | Nov. 05, 2025 | Nov. 05, 2025 | Nov. 05, 2025 | Nov. 05, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 14,270 | ||||||||
| Investment Owned, at Cost | 14,105 | ||||||||
| Investment Owned, at Fair Value | $ 14,132 | ||||||||
| Fair Value As A Percentage of Member's Equity | 46.73% | ||||||||
| Investment, Identifier [Axis]: Drew Foam Companies Inc, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 11/5/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:DrewFoamCompaniesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Nov. 09, 2020 | ||||||||
| Investment Maturity Date | Nov. 05, 2025 | Nov. 05, 2025 | Nov. 05, 2025 | Nov. 05, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 7,207 | ||||||||
| Investment Owned, at Cost | 7,096 | ||||||||
| Investment Owned, at Fair Value | $ 7,183 | ||||||||
| Fair Value As A Percentage of Member's Equity | 27.61% | ||||||||
| Investment, Identifier [Axis]: E-Phoenix Acquisition Co. Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 5.50%, Rate 10.23%, Due 6/23/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:E-PhoenixAcquisitionCo.Inc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 5.50% | 5.50% | 5.50% | 5.50% | |||||
| Investment Interest Rate | 10.23% | 10.23% | 10.23% | 10.23% | |||||
| Investment, Acquisition Date | Jul. 15, 2021 | ||||||||
| Investment Maturity Date | Jun. 23, 2027 | Jun. 23, 2027 | Jun. 23, 2027 | Jun. 23, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 8,865 | ||||||||
| Investment Owned, at Cost | 8,782 | ||||||||
| Investment Owned, at Fair Value | $ 8,686 | ||||||||
| Fair Value As A Percentage of Member's Equity | 28.72% | ||||||||
| Investment, Identifier [Axis]: E-Phoenix Acquisition Co. Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 5.75%, Rate 6.75%, Due 6/23/2027 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:E-PhoenixAcquisitionCo.Inc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 5.75% | 5.75% | 5.75% | 5.75% | |||||
| Investment Interest Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment, Acquisition Date | Jul. 15, 2021 | ||||||||
| Investment Maturity Date | Jun. 23, 2027 | Jun. 23, 2027 | Jun. 23, 2027 | Jun. 23, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 8,955 | ||||||||
| Investment Owned, at Cost | 8,852 | ||||||||
| Investment Owned, at Fair Value | $ 8,901 | ||||||||
| Fair Value As A Percentage of Member's Equity | 34.22% | ||||||||
| Investment, Identifier [Axis]: Eddy Acquisitions, LLC Preferred Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:EddyAcquisitionsLLCMember | whf:EddyAcquisitionsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | us-gaap:PreferredStockMember | whf:PreferredUnitsMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | |
| Investment, Basis Spread, Variable Rate | 12% | 12% | 12% | 12% | 12% | 12% | 12% | 12% | |
| Investment Interest Rate | 12% | 12% | 12% | 12% | 12% | 12% | 12% | 12% | |
| Investment, Acquisition Date | Sep. 15, 2021 | Sep. 15, 2021 | |||||||
| Investment Owned, Balance, Principal Amount | $ 167 | $ 167 | |||||||
| Investment Owned, at Cost | 167 | 167 | |||||||
| Investment Owned, at Fair Value | $ 83 | $ 167 | |||||||
| Investment, Identifier [Axis]: Education Networks of America, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:EducationNetworksofAmericaIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 5.50% | 5.50% | 5.50% | 5.50% | |||||
| Investment Interest Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment, Acquisition Date | Nov. 30, 2021 | ||||||||
| Investment Maturity Date | Oct. 27, 2026 | Oct. 27, 2026 | Oct. 27, 2026 | Oct. 27, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 4,719 | ||||||||
| Investment Owned, at Cost | 4,511 | ||||||||
| Investment Owned, at Fair Value | $ 4,508 | ||||||||
| Investment, Identifier [Axis]: EducationDynamics, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:EducationDynamicsLLCMember | whf:EducationDynamicsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 7% | 7% | 7% | 7% | 7% | 7% | 7% | 7% | |
| Investment Interest Rate | 11.39% | 8% | 11.39% | 11.39% | 11.39% | 8% | 8% | 8% | |
| Investment, Acquisition Date | Sep. 15, 2021 | Sep. 15, 2021 | |||||||
| Investment Maturity Date | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | |
| Investment Owned, at Fair Value | $ (26) | ||||||||
| Investment, Interest Rate, Paid in Kind | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | |
| Investment, Interest Rate, Paid in Cash | 10.89% | 7.50% | 10.89% | 10.89% | 10.89% | 7.50% | 7.50% | 7.50% | |
| Investment, Identifier [Axis]: EducationDynamics, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:EducationDynamicsLLCMember | whf:EducationDynamicsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 7% | 7% | 7% | 7% | 7% | 7% | 7% | 7% | |
| Investment Interest Rate | 11.39% | 8% | 11.39% | 11.39% | 11.39% | 8% | 8% | 8% | |
| Investment, Acquisition Date | Sep. 15, 2021 | Sep. 15, 2021 | |||||||
| Investment Maturity Date | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | |
| Investment Owned, at Fair Value | $ (18) | ||||||||
| Investment, Interest Rate, Paid in Kind | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | |
| Investment, Interest Rate, Paid in Cash | 10.89% | 7.50% | 10.89% | 10.89% | 10.89% | 7.50% | 7.50% | 7.50% | |
| Investment, Identifier [Axis]: EducationDynamics, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:EducationDynamicsLLCMember | whf:EducationDynamicsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 7% | 7% | 7% | 7% | 7% | 7% | 7% | 7% | |
| Investment Interest Rate | 11.39% | 8% | 11.39% | 11.39% | 11.39% | 8% | 8% | 8% | |
| Investment, Acquisition Date | Sep. 15, 2021 | Sep. 15, 2021 | |||||||
| Investment Maturity Date | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | Sep. 15, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 13,053 | $ 13,318 | |||||||
| Investment Owned, at Cost | 12,861 | 13,068 | |||||||
| Investment Owned, at Fair Value | $ 12,663 | $ 13,064 | |||||||
| Investment, Interest Rate, Paid in Kind | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | |
| Investment, Interest Rate, Paid in Cash | 10.89% | 7.50% | 10.89% | 10.89% | 10.89% | 7.50% | 7.50% | 7.50% | |
| Investment, Identifier [Axis]: EducationDynamics, LLC Subordinated Unsecured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:EducationDynamicsLLCMember | whf:EducationDynamicsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:SubordinatedUnsecuredTermLoanMember | whf:SubordinatedUnsecuredTermLoanMember | whf:SubordinatedUnsecuredTermLoanMember | whf:SubordinatedUnsecuredTermLoanMember | whf:SubordinatedUnsecuredTermLoanMember | whf:SubordinatedUnsecuredTermLoanMember | whf:SubordinatedUnsecuredTermLoanMember | whf:SubordinatedUnsecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | Education Services [Member] | |
| Investment, Basis Spread, Variable Rate | 4% | 4% | 4% | 4% | 4% | 4% | 4% | 4% | |
| Investment Interest Rate | 4% | 4% | 4% | 4% | 4% | 4% | 4% | 4% | |
| Investment, Acquisition Date | Sep. 15, 2021 | Sep. 15, 2021 | |||||||
| Investment Maturity Date | Mar. 15, 2027 | Mar. 15, 2027 | Mar. 15, 2027 | Mar. 15, 2027 | Mar. 15, 2027 | Mar. 15, 2027 | Mar. 15, 2027 | Mar. 15, 2027 | |
| Investment Owned, Balance, Principal Amount | $ 167 | $ 167 | |||||||
| Investment Owned, at Cost | 167 | 167 | |||||||
| Investment Owned, at Fair Value | $ 167 | $ 167 | |||||||
| Investment, Identifier [Axis]: Empire Office, Inc First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:EmpireOfficeIncMember | whf:EmpireOfficeIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | |
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | |
| Investment Interest Rate | 11.13% | 8.25% | 11.13% | 11.13% | 11.13% | 8.25% | 8.25% | 8.25% | |
| Investment, Acquisition Date | Aug. 17, 2021 | Aug. 17, 2021 | |||||||
| Investment Maturity Date | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | |
| Investment Owned, Balance, Principal Amount | $ 4,803 | ||||||||
| Investment Owned, at Cost | 4,746 | ||||||||
| Investment Owned, at Fair Value | $ 4,754 | $ 7 | |||||||
| Investment, Identifier [Axis]: Empire Office, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:EmpireOfficeIncMember | whf:EmpireOfficeIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | Office Services And Supplies [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | |
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | |
| Investment Interest Rate | 11.13% | 8.25% | 11.13% | 11.13% | 11.13% | 8.25% | 8.25% | 8.25% | |
| Investment, Acquisition Date | Apr. 12, 2019 | Apr. 12, 2019 | |||||||
| Investment Maturity Date | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | Apr. 12, 2024 | |
| Investment Owned, Balance, Principal Amount | $ 11,806 | $ 12,656 | |||||||
| Investment Owned, at Cost | 11,728 | 12,507 | |||||||
| Investment Owned, at Fair Value | $ 11,687 | $ 12,589 | |||||||
| Investment, Identifier [Axis]: Epiphany Business Services, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:EpiphanyBusinessServicesLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment Interest Rate | 8.50% | 8.50% | 8.50% | 8.50% | |||||
| Investment, Acquisition Date | Dec. 04, 2020 | ||||||||
| Investment Maturity Date | Jun. 22, 2023 | Jun. 22, 2023 | Jun. 22, 2023 | Jun. 22, 2023 | |||||
| Investment Owned, Balance, Principal Amount | $ 3,052 | ||||||||
| Investment Owned, at Cost | 3,008 | ||||||||
| Investment Owned, at Fair Value | $ 3,027 | ||||||||
| Investment, Identifier [Axis]: Epiphany Business Services, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:EpiphanyBusinessServicesLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment Interest Rate | 8.50% | 8.50% | 8.50% | 8.50% | |||||
| Investment, Acquisition Date | Dec. 04, 2020 | ||||||||
| Investment Maturity Date | Jun. 22, 2023 | Jun. 22, 2023 | Jun. 22, 2023 | Jun. 22, 2023 | |||||
| Investment Owned, at Fair Value | $ 3 | ||||||||
| Investment, Identifier [Axis]: Epiphany Business Services, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:EpiphanyBusinessServicesLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment Interest Rate | 8.50% | 8.50% | 8.50% | 8.50% | |||||
| Investment, Acquisition Date | Dec. 04, 2020 | ||||||||
| Investment Maturity Date | Jun. 22, 2023 | Jun. 22, 2023 | Jun. 22, 2023 | Jun. 22, 2023 | |||||
| Investment Owned, Balance, Principal Amount | $ 4,278 | ||||||||
| Investment Owned, at Cost | 4,214 | ||||||||
| Investment Owned, at Fair Value | $ 4,235 | ||||||||
| Investment, Identifier [Axis]: Escalon Services Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:EscalonServicesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 13.50% | 13.50% | 13.50% | 13.50% | |||||
| Investment Interest Rate | 14.50% | 14.50% | 14.50% | 14.50% | |||||
| Investment, Acquisition Date | Dec. 04, 2020 | ||||||||
| Investment Maturity Date | Dec. 04, 2025 | Dec. 04, 2025 | Dec. 04, 2025 | Dec. 04, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 8,046 | ||||||||
| Investment Owned, at Cost | 7,490 | ||||||||
| Investment Owned, at Fair Value | $ 8,046 | ||||||||
| Investment, Interest Rate, Paid in Kind | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Investment, Interest Rate, Paid in Cash | 13% | 13% | 13% | 13% | |||||
| Investment, Identifier [Axis]: Escalon Services Inc Warrants | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:EscalonServicesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |||||
| Investment, Acquisition Date | Dec. 04, 2020 | ||||||||
| Investment Owned, Balance, Principal Amount | $ 709 | ||||||||
| Investment Owned, at Cost | 476 | ||||||||
| Investment Owned, at Fair Value | $ 893 | ||||||||
| Investment, Identifier [Axis]: FGI Acquisition Corp. (d/b/a Flexitallic Group SAS) First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:FgiAcquisitionCorpMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Commodity Chemicals [Member] | Commodity Chemicals [Member] | Commodity Chemicals [Member] | Commodity Chemicals [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7% | 7% | 7% | 7% | |||||
| Investment Interest Rate | 11.73% | 11.73% | 11.73% | 11.73% | |||||
| Investment, Acquisition Date | Oct. 28, 2019 | ||||||||
| Investment Maturity Date | Oct. 29, 2026 | Oct. 29, 2026 | Oct. 29, 2026 | Oct. 29, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 16,350 | ||||||||
| Investment Owned, at Cost | 15,794 | ||||||||
| Investment Owned, at Fair Value | $ 15,859 | ||||||||
| Investment, Interest Rate, Paid in Kind | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Investment, Interest Rate, Paid in Cash | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Investment, Identifier [Axis]: FR Flow Control CB LLC, First Lien Secured Term Loan B, Floor 1.00%, Spread L plus 5.50%, Rate 6.50%, Due 6/28/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:FRFlowControlCBLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery | Industrial Machinery | Industrial Machinery | Industrial Machinery | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 5.50% | 5.50% | 5.50% | 5.50% | |||||
| Investment Interest Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment, Acquisition Date | Jul. 19, 2019 | ||||||||
| Investment Maturity Date | Jun. 28, 2026 | Jun. 28, 2026 | Jun. 28, 2026 | Jun. 28, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 6,815 | ||||||||
| Investment Owned, at Cost | 6,727 | ||||||||
| Investment Owned, at Fair Value | $ 6,815 | ||||||||
| Fair Value As A Percentage of Member's Equity | 26.20% | ||||||||
| Investment, Identifier [Axis]: Flexitallic Group SAS First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:FlexitallicGroupSASMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Commodity Chemicals [Member] | Commodity Chemicals [Member] | Commodity Chemicals [Member] | Commodity Chemicals [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment Interest Rate | 8.50% | 8.50% | 8.50% | 8.50% | |||||
| Investment, Acquisition Date | Oct. 28, 2019 | ||||||||
| Investment Maturity Date | Oct. 29, 2026 | Oct. 29, 2026 | Oct. 29, 2026 | Oct. 29, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 15,722 | ||||||||
| Investment Owned, at Cost | 15,047 | ||||||||
| Investment Owned, at Fair Value | $ 15,172 | ||||||||
| Investment, Interest Rate, Paid in Kind | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Investment, Interest Rate, Paid in Cash | 8% | 8% | 8% | 8% | |||||
| Investment, Identifier [Axis]: Foodservices Brand Group, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:FoodservicesBrandGroupLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Distributors [Member] | Distributors [Member] | Distributors [Member] | Distributors [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 8% | 8% | 8% | 8% | |||||
| Investment Interest Rate | 12.80% | 12.80% | 12.80% | 12.80% | |||||
| Investment, Acquisition Date | Nov. 22, 2022 | ||||||||
| Investment Maturity Date | Dec. 09, 2025 | Dec. 09, 2025 | Dec. 09, 2025 | Dec. 09, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 357 | ||||||||
| Investment Owned, at Cost | 357 | ||||||||
| Investment Owned, at Fair Value | $ 330 | ||||||||
| Investment, Identifier [Axis]: Foodservices Brand Group, LLC Second Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:FoodservicesBrandGroupLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Distributors [Member] | Distributors [Member] | Distributors [Member] | Distributors [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.92% | 10.92% | 10.92% | 10.92% | |||||
| Investment, Acquisition Date | Nov. 22, 2022 | ||||||||
| Investment Maturity Date | Jan. 08, 2026 | Jan. 08, 2026 | Jan. 08, 2026 | Jan. 08, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 5,171 | ||||||||
| Investment Owned, at Cost | 5,108 | ||||||||
| Investment Owned, at Fair Value | $ 3,841 | ||||||||
| Investment, Identifier [Axis]: Future Payment Technologies, LP First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:FuturePaymentTechnologiesLPMember | whf:FuturePaymentTechnologiesLPMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 8.25% | 8.25% | 8.25% | 8.25% | 8.25% | 8.25% | 8.25% | 8.25% | |
| Investment Interest Rate | 12.37% | 9.25% | 12.37% | 12.37% | 12.37% | 9.25% | 9.25% | 9.25% | |
| Investment, Acquisition Date | Dec. 23, 2016 | Dec. 23, 2016 | |||||||
| Investment Maturity Date | Jun. 07, 2024 | Jun. 07, 2024 | Jun. 07, 2024 | Jun. 07, 2024 | Jun. 07, 2024 | Jun. 07, 2024 | Jun. 07, 2024 | Jun. 07, 2024 | |
| Investment Owned, Balance, Principal Amount | $ 22,911 | $ 24,000 | |||||||
| Investment Owned, at Cost | 22,776 | 23,811 | |||||||
| Investment Owned, at Fair Value | $ 22,817 | $ 23,925 | |||||||
| Investment, Identifier [Axis]: Geo Logic Systems Ltd First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GeoLogicSystemsLtdMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 11.38% | 11.38% | 11.38% | 11.38% | |||||
| Investment, Acquisition Date | Jan. 22, 2020 | ||||||||
| Investment Maturity Date | Dec. 19, 2024 | Dec. 19, 2024 | Dec. 19, 2024 | Dec. 19, 2024 | |||||
| Investment Owned, at Fair Value | $ (9) | ||||||||
| Fair Value As A Percentage of Member's Equity | (0.03%) | ||||||||
| Investment, Identifier [Axis]: Geo Logic Systems Ltd First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GeoLogicSystemsLtdMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 11.38% | 11.38% | 11.38% | 11.38% | |||||
| Investment, Acquisition Date | Jan. 22, 2020 | ||||||||
| Investment Maturity Date | Dec. 19, 2024 | Dec. 19, 2024 | Dec. 19, 2024 | Dec. 19, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 20,088 | ||||||||
| Investment Owned, at Cost | $ 15,413 | ||||||||
| Investment Owned, at Fair Value | $ 14,545 | ||||||||
| Fair Value As A Percentage of Member's Equity | 48.10% | ||||||||
| Investment, Identifier [Axis]: Geo Logic Systems Ltd., First Lien Secured Revolving Loan, Floor 1.00%, Spread C plus 6.50%, Rate 7.50%, Due 12/19/2024 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GeoLogicSystemsLtdMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | Jan. 22, 2020 | ||||||||
| Investment Maturity Date | Dec. 19, 2024 | Dec. 19, 2024 | Dec. 19, 2024 | Dec. 19, 2024 | |||||
| Investment Owned, at Fair Value | $ 4 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.02% | ||||||||
| Investment, Identifier [Axis]: Geo Logic Systems Ltd., First Lien Secured Term Loan, Floor 1.00%, Spread C plus 6.50%, Rate 7.50%, Due 12/19/2024 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GeoLogicSystemsLtdMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | Jan. 22, 2020 | ||||||||
| Investment Maturity Date | Dec. 19, 2024 | Dec. 19, 2024 | Dec. 19, 2024 | Dec. 19, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 20,632 | ||||||||
| Investment Owned, at Cost | $ 15,766 | ||||||||
| Investment Owned, at Fair Value | $ 16,156 | ||||||||
| Fair Value As A Percentage of Member's Equity | 62.11% | ||||||||
| Investment, Identifier [Axis]: Grupo HIMA San Pablo, Inc Amended Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GrupoHIMASanPabloIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:AmendedTermLoanMember | whf:AmendedTermLoanMember | whf:AmendedTermLoanMember | whf:AmendedTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | |||||
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Investment, Basis Spread, Variable Rate | 9% | 9% | 9% | 9% | |||||
| Investment Interest Rate | 10.50% | 10.50% | 10.50% | 10.50% | |||||
| Investment, Acquisition Date | Nov. 24, 2021 | ||||||||
| Investment Maturity Date | Nov. 24, 2023 | Nov. 24, 2023 | Nov. 24, 2023 | Nov. 24, 2023 | |||||
| Investment Owned, Balance, Principal Amount | $ 1,708 | ||||||||
| Investment Owned, at Cost | 1,704 | ||||||||
| Investment Owned, at Fair Value | $ 1,708 | ||||||||
| Investment, Interest Rate, Paid in Kind | 10.50% | 10.50% | 10.50% | 10.50% | |||||
| Investment, Interest Rate, Paid in Cash | 0% | 0% | 0% | 0% | |||||
| Investment, Identifier [Axis]: Grupo HIMA San Pablo, Inc First Lien Secured Term Loan A | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GrupoHIMASanPabloIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Basis Spread, Variable Rate | 9% | 9% | 9% | 9% | |||||
| Investment Interest Rate | 9.13% | 9.13% | 9.13% | 9.13% | |||||
| Investment, Acquisition Date | May 05, 2019 | ||||||||
| Investment Maturity Date | Apr. 30, 2019 | Apr. 30, 2019 | Apr. 30, 2019 | Apr. 30, 2019 | |||||
| Investment Owned, Balance, Principal Amount | $ 3,476 | ||||||||
| Investment Owned, at Cost | 3,476 | ||||||||
| Investment Owned, at Fair Value | $ 1,169 | ||||||||
| Investment, Identifier [Axis]: Grupo HIMA San Pablo, Inc First Lien Secured Term Loan B | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GrupoHIMASanPabloIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Investment, Basis Spread, Variable Rate | 9% | 9% | 9% | 9% | |||||
| Investment Interest Rate | 10.50% | 10.50% | 10.50% | 10.50% | |||||
| Investment, Acquisition Date | Feb. 01, 2013 | ||||||||
| Investment Maturity Date | Apr. 30, 2019 | Apr. 30, 2019 | Apr. 30, 2019 | Apr. 30, 2019 | |||||
| Investment Owned, Balance, Principal Amount | $ 12,185 | ||||||||
| Investment Owned, at Cost | 12,185 | ||||||||
| Investment Owned, at Fair Value | $ 4,097 | ||||||||
| Investment, Identifier [Axis]: Grupo HIMA San Pablo, Inc Second Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GrupoHIMASanPabloIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Basis Spread, Variable Rate | 15.75% | 15.75% | 15.75% | 15.75% | |||||
| Investment Interest Rate | 15.75% | 15.75% | 15.75% | 15.75% | |||||
| Investment, Acquisition Date | Feb. 01, 2013 | ||||||||
| Investment Maturity Date | Jul. 31, 2018 | Jul. 31, 2018 | Jul. 31, 2018 | Jul. 31, 2018 | |||||
| Investment Owned, Balance, Principal Amount | $ 1,028 | ||||||||
| Investment Owned, at Cost | $ 1,024 | ||||||||
| Investment, Interest Rate, Paid in Kind | 2% | 2% | 2% | 2% | |||||
| Investment, Interest Rate, Paid in Cash | 13.75% | 13.75% | 13.75% | 13.75% | |||||
| Investment, Identifier [Axis]: Grupo HIMA San Pablo, Inc Superpriority Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GrupoHIMASanPabloIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:SuperpriorityDelayedDrawLoanMember | whf:SuperpriorityDelayedDrawLoanMember | whf:SuperpriorityDelayedDrawLoanMember | whf:SuperpriorityDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | Health Care Facilities [Member] | |||||
| Investment, Basis Spread, Variable Rate | 12% | 12% | 12% | 12% | |||||
| Investment Interest Rate | 12% | 12% | 12% | 12% | |||||
| Investment, Acquisition Date | Nov. 24, 2021 | ||||||||
| Investment Maturity Date | Nov. 24, 2023 | Nov. 24, 2023 | Nov. 24, 2023 | Nov. 24, 2023 | |||||
| Investment Owned, Balance, Principal Amount | $ 568 | ||||||||
| Investment Owned, at Cost | 568 | ||||||||
| Investment Owned, at Fair Value | $ 568 | ||||||||
| Investment, Identifier [Axis]: Gulf Winds International Acquisition, LLC (d/b/a Gulf Winds International, Inc.) First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GulfWindsInternationalAcquisitionLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7% | 7% | 7% | 7% | |||||
| Investment Interest Rate | 11.43% | 11.43% | 11.43% | 11.43% | |||||
| Investment, Acquisition Date | Dec. 16, 2022 | ||||||||
| Investment Maturity Date | Dec. 18, 2028 | Dec. 18, 2028 | Dec. 18, 2028 | Dec. 18, 2028 | |||||
| Investment, Identifier [Axis]: Gulf Winds International Acquisition, LLC (d/b/a Gulf Winds International, Inc.) First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:GulfWindsInternationalAcquisitionLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7% | 7% | 7% | 7% | |||||
| Investment Interest Rate | 11.43% | 11.43% | 11.43% | 11.43% | |||||
| Investment, Acquisition Date | Dec. 16, 2022 | ||||||||
| Investment Maturity Date | Dec. 18, 2028 | Dec. 18, 2028 | Dec. 18, 2028 | Dec. 18, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 4,853 | ||||||||
| Investment Owned, at Cost | 4,708 | ||||||||
| Investment Owned, at Fair Value | $ 4,708 | ||||||||
| Investment, Identifier [Axis]: HC Salon Holdings, Inc First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:HCSalonHoldingsIncMember | whf:HCSalonHoldingsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Research & Consulting Services | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.50% | 8% | 6.50% | 6.50% | 6.50% | 8% | 8% | 8% | |
| Investment Interest Rate | 11.23% | 9% | 11.23% | 11.23% | 11.23% | 9% | 9% | 9% | |
| Investment, Acquisition Date | Sep. 30, 2021 | Sep. 30, 2021 | |||||||
| Investment Maturity Date | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | |
| Investment Owned, at Fair Value | $ 10 | ||||||||
| Investment, Identifier [Axis]: HC Salon Holdings, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:HCSalonHoldingsIncMember | whf:HCSalonHoldingsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Research & Consulting Services | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.50% | 8% | 6.50% | 6.50% | 6.50% | 8% | 8% | 8% | |
| Investment Interest Rate | 11.23% | 9% | 11.23% | 11.23% | 11.23% | 9% | 9% | 9% | |
| Investment, Acquisition Date | Sep. 30, 2021 | Sep. 30, 2021 | |||||||
| Investment Maturity Date | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | Sep. 30, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 11,521 | $ 11,638 | |||||||
| Investment Owned, at Cost | 11,348 | 11,417 | |||||||
| Investment Owned, at Fair Value | $ 11,521 | $ 11,416 | |||||||
| Investment, Identifier [Axis]: HRG Management, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:HRGManagementLLCMember | HRG Management, LLC HomeRiver Group, LLC [Member] | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Investment Interest Rate | 10.48% | 7.25% | 10.48% | 10.48% | 10.48% | 7.25% | 7.25% | 7.25% | |
| Investment, Acquisition Date | Dec. 23, 2022 | Oct. 19, 2021 | |||||||
| Investment Maturity Date | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 653 | ||||||||
| Investment Owned, at Cost | 644 | ||||||||
| Investment Owned, at Fair Value | $ 651 | ||||||||
| Investment, Identifier [Axis]: HRG Management, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | HRG Management, LLC HomeRiver Group, LLC [Member] | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Investment, Acquisition Date | Oct. 19, 2021 | ||||||||
| Investment Maturity Date | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | |||||
| Investment, Identifier [Axis]: HRG Management, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | HRG Management, LLC HomeRiver Group, LLC [Member] | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Investment, Acquisition Date | Oct. 19, 2021 | ||||||||
| Investment Maturity Date | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 4,875 | ||||||||
| Investment Owned, at Cost | 4,781 | ||||||||
| Investment Owned, at Fair Value | $ 4,780 | ||||||||
| Investment, Identifier [Axis]: HRG Management, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 7.25%, Due 10/19/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:HRGManagementLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Investment, Acquisition Date | Dec. 28, 2021 | ||||||||
| Investment Maturity Date | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 4,875 | ||||||||
| Investment Owned, at Cost | 4,781 | ||||||||
| Investment Owned, at Fair Value | $ 4,780 | ||||||||
| Fair Value As A Percentage of Member's Equity | 18.38% | ||||||||
| Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Delayed Draw Loan, Floor 1.00% Base Rate Plus, 6.12%, Rate 10.90%, Due 10/19/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:HRGManagementLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.10% | 6.10% | 6.10% | 6.10% | |||||
| Investment Interest Rate | 10.92% | 10.92% | 10.92% | 10.92% | |||||
| Investment, Acquisition Date | Feb. 18, 2022 | ||||||||
| Investment Maturity Date | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 1,768 | ||||||||
| Investment Owned, at Cost | 1,741 | ||||||||
| Investment Owned, at Fair Value | $ 1,720 | ||||||||
| Fair Value As A Percentage of Member's Equity | 5.69% | ||||||||
| Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate 10.48%, Due 10/19/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:HRGManagementLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 10.48% | 10.48% | 10.48% | 10.48% | |||||
| Investment, Acquisition Date | Feb. 18, 2022 | ||||||||
| Investment Maturity Date | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | |||||
| Investment Owned, at Fair Value | $ (11) | ||||||||
| Fair Value As A Percentage of Member's Equity | (0.04%) | ||||||||
| Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate 10.48%, Due 10/19/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:HRGManagementLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 10.48% | 10.48% | 10.48% | 10.48% | |||||
| Investment, Acquisition Date | Dec. 28, 2021 | ||||||||
| Investment Maturity Date | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | Oct. 19, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 9,653 | ||||||||
| Investment Owned, at Cost | 9,505 | ||||||||
| Investment Owned, at Fair Value | $ 9,412 | ||||||||
| Fair Value As A Percentage of Member's Equity | 31.13% | ||||||||
| Investment, Identifier [Axis]: Hollander Intermediate LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:HollanderIntermediateLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 2% | 2% | 2% | 2% | |||||
| Investment, Basis Spread, Variable Rate | 8.75% | 8.75% | 8.75% | 8.75% | |||||
| Investment Interest Rate | 13.19% | 13.19% | 13.19% | 13.19% | |||||
| Investment, Acquisition Date | Sep. 19, 2022 | ||||||||
| Investment Maturity Date | Sep. 21, 2026 | Sep. 21, 2026 | Sep. 21, 2026 | Sep. 21, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 4,861 | ||||||||
| Investment Owned, at Cost | 4,821 | ||||||||
| Investment Owned, at Fair Value | $ 4,609 | ||||||||
| Investment, Identifier [Axis]: Honors Holdings, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:HonorsHoldingsLLCMember | whf:HonorsHoldingsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 7% | 7.58% | 7% | 7% | 7% | 7.58% | 7.58% | 7.58% | |
| Investment Interest Rate | 11.62% | 8.58% | 11.62% | 11.62% | 11.62% | 8.58% | 8.58% | 8.58% | |
| Investment, Acquisition Date | Sep. 06, 2019 | Sep. 06, 2019 | |||||||
| Investment Maturity Date | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | |
| Investment Owned, Balance, Principal Amount | $ 4,649 | $ 4,649 | |||||||
| Investment Owned, at Cost | 4,621 | 4,611 | |||||||
| Investment Owned, at Fair Value | $ 4,557 | $ 4,578 | |||||||
| Investment, Interest Rate, Paid in Kind | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Investment, Interest Rate, Paid in Cash | 8.08% | 8.08% | 8.08% | 8.08% | |||||
| Investment, Identifier [Axis]: Honors Holdings, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:HonorsHoldingsLLCMember | whf:HonorsHoldingsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 7.12% | 7.96% | 7.12% | 7.12% | 7.12% | 7.96% | 7.96% | 7.96% | |
| Investment Interest Rate | 11.73% | 8.96% | 11.73% | 11.73% | 11.73% | 8.96% | 8.96% | 8.96% | |
| Investment, Acquisition Date | Sep. 06, 2019 | Sep. 06, 2019 | |||||||
| Investment Maturity Date | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | Sep. 06, 2024 | |
| Investment Owned, Balance, Principal Amount | $ 9,440 | $ 9,440 | |||||||
| Investment Owned, at Cost | 9,344 | 9,315 | |||||||
| Investment Owned, at Fair Value | $ 9,254 | $ 9,296 | |||||||
| Investment, Interest Rate, Paid in Kind | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Investment, Interest Rate, Paid in Cash | 8.46% | 8.46% | 8.46% | 8.46% | |||||
| Investment, Identifier [Axis]: I And I Sales Group, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IAndISalesGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Dec. 15, 2021 | ||||||||
| Investment Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 396 | ||||||||
| Investment Owned, at Cost | 388 | ||||||||
| Investment Owned, at Fair Value | $ 388 | ||||||||
| Investment, Identifier [Axis]: I And I Sales Group, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IAndISalesGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Dec. 15, 2021 | ||||||||
| Investment Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |||||
| Investment, Identifier [Axis]: I And I Sales Group, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IAndISalesGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Dec. 15, 2021 | ||||||||
| Investment Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 9,286 | ||||||||
| Investment Owned, at Cost | 9,102 | ||||||||
| Investment Owned, at Fair Value | $ 9,100 | ||||||||
| Investment, Identifier [Axis]: I&I Sales Group, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IAndISalesGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 5.75% | 5.75% | 5.75% | 5.75% | |||||
| Investment Interest Rate | 10.43% | 10.43% | 10.43% | 10.43% | |||||
| Investment, Acquisition Date | Mar. 11, 2022 | ||||||||
| Investment Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 2,756 | ||||||||
| Investment Owned, at Cost | 2,713 | ||||||||
| Investment Owned, at Fair Value | $ 2,699 | ||||||||
| Fair Value As A Percentage of Member's Equity | 8.93% | ||||||||
| Investment, Identifier [Axis]: I&I Sales Group, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IAndISalesGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 5.75% | 5.75% | 5.75% | 5.75% | |||||
| Investment Interest Rate | 10.43% | 10.43% | 10.43% | 10.43% | |||||
| Investment, Acquisition Date | Feb. 18, 2022 | ||||||||
| Investment Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |||||
| Investment Owned, at Fair Value | $ (3) | ||||||||
| Investment, Identifier [Axis]: I&I Sales Group, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IAndISalesGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Advertising | Advertising | Advertising | Advertising | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 5.75% | 5.75% | 5.75% | 5.75% | |||||
| Investment Interest Rate | 10.48% | 10.48% | 10.48% | 10.48% | |||||
| Investment, Acquisition Date | Feb. 18, 2022 | ||||||||
| Investment Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 9,193 | ||||||||
| Investment Owned, at Cost | 9,047 | ||||||||
| Investment Owned, at Fair Value | $ 9,007 | ||||||||
| Fair Value As A Percentage of Member's Equity | 29.79% | ||||||||
| Investment, Identifier [Axis]: IDIG Parent, LLC, First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/15/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IDIGParentLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | Systems Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Sep. 21, 2021 | ||||||||
| Investment Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 1,411 | ||||||||
| Investment Owned, at Cost | 1,397 | ||||||||
| Investment Owned, at Fair Value | $ 1,411 | ||||||||
| Fair Value As A Percentage of Member's Equity | 5.42% | ||||||||
| Investment, Identifier [Axis]: IDIG Parent, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/15/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IDIGParentLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | Systems Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Jun. 25, 2021 | ||||||||
| Investment Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |||||
| Investment Owned, at Fair Value | $ 5 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.02% | ||||||||
| Investment, Identifier [Axis]: IDIG Parent, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/15/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IDIGParentLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Systems Software | Systems Software | Systems Software | Systems Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Jun. 25, 2021 | ||||||||
| Investment Maturity Date | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | Dec. 15, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 8,482 | ||||||||
| Investment Owned, at Cost | 8,404 | ||||||||
| Investment Owned, at Fair Value | $ 8,482 | ||||||||
| Fair Value As A Percentage of Member's Equity | 32.61% | ||||||||
| Investment, Identifier [Axis]: ITS Buyer Inc First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ITSBuyerIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Dec. 22, 2021 | ||||||||
| Investment Maturity Date | Jun. 15, 2026 | Jun. 15, 2026 | Jun. 15, 2026 | Jun. 15, 2026 | |||||
| Investment, Identifier [Axis]: ITS Buyer Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ITSBuyerIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Dec. 22, 2021 | ||||||||
| Investment Maturity Date | Jun. 15, 2026 | Jun. 15, 2026 | Jun. 15, 2026 | Jun. 15, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 3,612 | ||||||||
| Investment Owned, at Cost | 3,540 | ||||||||
| Investment Owned, at Fair Value | $ 3,539 | ||||||||
| Investment, Identifier [Axis]: ITS Buyer Inc. First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ITSBuyerIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 10.73% | 10.73% | 10.73% | 10.73% | |||||
| Investment, Acquisition Date | Feb. 17, 2022 | ||||||||
| Investment Maturity Date | Jun. 15, 2026 | Jun. 15, 2026 | Jun. 15, 2026 | Jun. 15, 2026 | |||||
| Investment Owned, at Fair Value | $ 3 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.01% | ||||||||
| Investment, Identifier [Axis]: ITS Buyer Inc. First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ITSBuyerIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 10.73% | 10.73% | 10.73% | 10.73% | |||||
| Investment, Acquisition Date | Feb. 17, 2022 | ||||||||
| Investment Maturity Date | Jun. 15, 2026 | Jun. 15, 2026 | Jun. 15, 2026 | Jun. 15, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 3,577 | ||||||||
| Investment Owned, at Cost | 3,523 | ||||||||
| Investment Owned, at Fair Value | $ 3,542 | ||||||||
| Fair Value As A Percentage of Member's Equity | 11.71% | ||||||||
| Investment, Identifier [Axis]: ImageOne Industries, LLC Common A Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ImageOneIndustriesLLCMember | whf:ImageOneIndustriesLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:CommonAUnitsMember | whf:CommonAUnitsMember | whf:CommonAUnitsMember | whf:CommonAUnitsMember | whf:CommonAUnitsMember | whf:CommonAUnitsMember | whf:CommonAUnitsMember | whf:CommonAUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |
| Investment, Acquisition Date | Sep. 20, 2019 | Sep. 20, 2019 | |||||||
| Investment Owned, Balance, Principal Amount | $ 229 | $ 225 | |||||||
| Investment Owned, at Cost | 4 | ||||||||
| Investment Owned, at Fair Value | $ 92 | $ 158 | |||||||
| Investment, Identifier [Axis]: Industrial Specialty Services USA LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IndustrialSpecialtyServicesUSALLCMember | whf:IndustrialSpecialtyServicesUSALLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:BaseRateMember | London Interbank Offered Rate (LIBOR) [Member] | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 5.90% | 6.25% | 5.90% | 5.90% | 5.90% | 6.25% | 6.25% | 6.25% | |
| Investment Interest Rate | 11.41% | 7.25% | 11.41% | 11.41% | 11.41% | 7.25% | 7.25% | 7.25% | |
| Investment, Acquisition Date | Dec. 31, 2021 | Dec. 31, 2021 | |||||||
| Investment Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 674 | ||||||||
| Investment Owned, at Cost | 663 | ||||||||
| Investment Owned, at Fair Value | $ 649 | ||||||||
| Investment, Identifier [Axis]: Industrial Specialty Services USA LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IndustrialSpecialtyServicesUSALLCMember | whf:IndustrialSpecialtyServicesUSALLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Investment Interest Rate | 10.98% | 7.25% | 10.98% | 10.98% | 10.98% | 7.25% | 7.25% | 7.25% | |
| Investment, Acquisition Date | Dec. 31, 2021 | Dec. 31, 2021 | |||||||
| Investment Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 11,887 | $ 12,007 | |||||||
| Investment Owned, at Cost | 11,697 | 11,767 | |||||||
| Investment Owned, at Fair Value | $ 11,559 | $ 11,767 | |||||||
| Investment, Identifier [Axis]: Inspired Beauty Brands, Inc First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:InspiredBeautyBrandsIncMember | whf:InspiredBeautyBrandsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Personal Products | Personal Products | Personal Products | Personal Products | Personal Products | Personal Products | Personal Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 7% | 7% | 7% | 7% | 7% | 7% | 7% | 7% | |
| Investment Interest Rate | 10.78% | 8% | 10.78% | 10.78% | 10.78% | 8% | 8% | 8% | |
| Investment, Acquisition Date | Dec. 30, 2020 | Dec. 30, 2020 | |||||||
| Investment Maturity Date | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 265 | ||||||||
| Investment Owned, at Cost | 262 | ||||||||
| Investment Owned, at Fair Value | $ 252 | $ 8 | |||||||
| Investment, Identifier [Axis]: Inspired Beauty Brands, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:InspiredBeautyBrandsIncMember | whf:InspiredBeautyBrandsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Personal Products | Personal Products | Personal Products | Personal Products | Personal Products | Personal Products | Personal Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 7% | 7% | 7% | 7% | 7% | 7% | 7% | 7% | |
| Investment Interest Rate | 11.65% | 8% | 11.65% | 11.65% | 11.65% | 8% | 8% | 8% | |
| Investment, Acquisition Date | Dec. 30, 2020 | Dec. 30, 2020 | |||||||
| Investment Maturity Date | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | Dec. 30, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 11,519 | $ 12,252 | |||||||
| Investment Owned, at Cost | 11,381 | 12,055 | |||||||
| Investment Owned, at Fair Value | $ 11,159 | $ 12,252 | |||||||
| Investment, Identifier [Axis]: IvyRehab Intermediate II, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IvyRehabIntermediateIILLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Investment, Acquisition Date | Dec. 04, 2020 | ||||||||
| Investment Maturity Date | Dec. 04, 2024 | Dec. 04, 2024 | Dec. 04, 2024 | Dec. 04, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 2,550 | ||||||||
| Investment Owned, at Cost | 2,517 | ||||||||
| Investment Owned, at Fair Value | $ 2,534 | ||||||||
| Investment, Identifier [Axis]: IvyRehab Intermediate II, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IvyRehabIntermediateIILLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | |||||
| Investment, Interest Rate, Floor | 3.25% | 3.25% | 3.25% | 3.25% | |||||
| Investment, Basis Spread, Variable Rate | 5.75% | 5.75% | 5.75% | 5.75% | |||||
| Investment Interest Rate | 9% | 9% | 9% | 9% | |||||
| Investment, Acquisition Date | Dec. 04, 2020 | ||||||||
| Investment Maturity Date | Dec. 04, 2024 | Dec. 04, 2024 | Dec. 04, 2024 | Dec. 04, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 142 | ||||||||
| Investment Owned, at Cost | 139 | ||||||||
| Investment Owned, at Fair Value | $ 147 | ||||||||
| Investment, Identifier [Axis]: IvyRehab Intermediate II, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:IvyRehabIntermediateIILLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Investment, Acquisition Date | Dec. 04, 2020 | ||||||||
| Investment Maturity Date | Dec. 04, 2024 | Dec. 04, 2024 | Dec. 04, 2024 | Dec. 04, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 17,366 | ||||||||
| Investment Owned, at Cost | 17,121 | ||||||||
| Investment Owned, at Fair Value | $ 17,366 | ||||||||
| Investment, Identifier [Axis]: JVMC Holdings Corp First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:JVMCHoldingsCorpMember | whf:JVMCHoldingsCorpMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.50% | 6.75% | 6.50% | 6.50% | 6.50% | 6.75% | 6.75% | 6.75% | |
| Investment Interest Rate | 10.88% | 7.75% | 10.88% | 10.88% | 10.88% | 7.75% | 7.75% | 7.75% | |
| Investment, Acquisition Date | Feb. 28, 2019 | Feb. 28, 2019 | |||||||
| Investment Maturity Date | Feb. 28, 2024 | Feb. 28, 2024 | Feb. 28, 2024 | Feb. 28, 2024 | Feb. 28, 2024 | Feb. 28, 2024 | Feb. 28, 2024 | Feb. 28, 2024 | |
| Investment Owned, Balance, Principal Amount | $ 11,860 | $ 12,729 | |||||||
| Investment Owned, at Cost | 11,833 | 12,674 | |||||||
| Investment Owned, at Fair Value | $ 11,860 | $ 12,729 | |||||||
| Investment, Identifier [Axis]: JZ Capital Partners Ltd First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:JZCapitalPartnersLtdMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Asset Management And Custody Banks [Member] | Asset Management And Custody Banks [Member] | Asset Management And Custody Banks [Member] | Asset Management And Custody Banks [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7% | 7% | 7% | 7% | |||||
| Investment Interest Rate | 11.33% | 11.33% | 11.33% | 11.33% | |||||
| Investment, Acquisition Date | Jan. 26, 2022 | ||||||||
| Investment Maturity Date | Jan. 26, 2027 | Jan. 26, 2027 | Jan. 26, 2027 | Jan. 26, 2027 | |||||
| Investment Owned, at Fair Value | $ 9 | ||||||||
| Investment, Identifier [Axis]: JZ Capital Partners Ltd First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:JZCapitalPartnersLtdMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Asset Management And Custody Banks [Member] | Asset Management And Custody Banks [Member] | Asset Management And Custody Banks [Member] | Asset Management And Custody Banks [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7% | 7% | 7% | 7% | |||||
| Investment Interest Rate | 11.33% | 11.33% | 11.33% | 11.33% | |||||
| Investment, Acquisition Date | Jan. 26, 2022 | ||||||||
| Investment Maturity Date | Jan. 26, 2027 | Jan. 26, 2027 | Jan. 26, 2027 | Jan. 26, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 10,286 | ||||||||
| Investment Owned, at Cost | 10,118 | ||||||||
| Investment Owned, at Fair Value | $ 10,135 | ||||||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:JuniperLandscapingHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Dec. 29, 2021 | ||||||||
| Investment Maturity Date | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | |||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Delayed Draw Loan Due 12/29/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:JuniperLandscapingHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 11.14% | 11.14% | 11.14% | 11.14% | |||||
| Investment, Acquisition Date | Mar. 01, 2022 | ||||||||
| Investment Maturity Date | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 1,909 | ||||||||
| Investment Owned, at Cost | 1,882 | ||||||||
| Investment Owned, at Fair Value | $ 1,868 | ||||||||
| Fair Value As A Percentage of Member's Equity | 6.18% | ||||||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:JuniperLandscapingHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Dec. 29, 2021 | ||||||||
| Investment Maturity Date | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 597 | ||||||||
| Investment Owned, at Cost | 586 | ||||||||
| Investment Owned, at Fair Value | $ 586 | ||||||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Revolving Loan Due 12/29/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:JuniperLandscapingHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 10.54% | 10.54% | 10.54% | 10.54% | |||||
| Investment, Acquisition Date | Mar. 01, 2022 | ||||||||
| Investment Maturity Date | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 298 | ||||||||
| Investment Owned, at Cost | 294 | ||||||||
| Investment Owned, at Fair Value | $ 287 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.95% | ||||||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:JuniperLandscapingHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Dec. 29, 2021 | ||||||||
| Investment Maturity Date | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 11,420 | ||||||||
| Investment Owned, at Cost | 11,221 | ||||||||
| Investment Owned, at Fair Value | $ 11,220 | ||||||||
| Investment, Identifier [Axis]: Juniper Landscaping Holdings LLC First Lien Secured Term Loan Due 12/29/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:JuniperLandscapingHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 11.15% | 11.15% | 11.15% | 11.15% | |||||
| Investment, Acquisition Date | Mar. 01, 2022 | ||||||||
| Investment Maturity Date | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | Dec. 29, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 11,306 | ||||||||
| Investment Owned, at Cost | 11,147 | ||||||||
| Investment Owned, at Fair Value | $ 11,079 | ||||||||
| Fair Value As A Percentage of Member's Equity | 36.64% | ||||||||
| Investment, Identifier [Axis]: Keras Holdings, LLC Shares | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:KerasHoldingsLLCMember | whf:KerasHoldingsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |
| Investment, Acquisition Date | Dec. 31, 2020 | Dec. 31, 2020 | |||||||
| Investment Owned, Balance, Principal Amount | $ 496 | $ 496 | |||||||
| Investment Owned, at Cost | 496 | 496 | |||||||
| Investment Owned, at Fair Value | $ 363 | $ 496 | |||||||
| Investment, Identifier [Axis]: LHS Borrower, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LHSBorrowerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Investment, Acquisition Date | Sep. 30, 2020 | ||||||||
| Investment Maturity Date | Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2025 | |||||
| Investment Owned, at Fair Value | $ 4 | ||||||||
| Investment, Identifier [Axis]: LHS Borrower, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LHSBorrowerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Investment, Acquisition Date | Sep. 30, 2020 | ||||||||
| Investment Maturity Date | Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 9,506 | ||||||||
| Investment Owned, at Cost | 9,346 | ||||||||
| Investment Owned, at Fair Value | $ 9,416 | ||||||||
| Investment, Identifier [Axis]: LHS Borrower, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.75%, Rate 7.75%, Due 9/30/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LHSBorrowerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Investment, Acquisition Date | Oct. 09, 2020 | ||||||||
| Investment Maturity Date | Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2025 | |||||
| Investment Owned, at Fair Value | $ 4 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.02% | ||||||||
| Investment, Identifier [Axis]: LHS Borrower, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.75%, Rate 7.75%, Due 9/30/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LHSBorrowerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Investment, Acquisition Date | Oct. 09, 2020 | ||||||||
| Investment Maturity Date | Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 9,506 | ||||||||
| Investment Owned, at Cost | 9,345 | ||||||||
| Investment Owned, at Fair Value | $ 9,416 | ||||||||
| Fair Value As A Percentage of Member's Equity | 36.20% | ||||||||
| Investment, Identifier [Axis]: LINC Systems, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.25%, Rate 7.25%, Due 2/24/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LINCSystemsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Trading Companies & Distributors | Trading Companies & Distributors | Trading Companies & Distributors | Trading Companies & Distributors | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Investment, Acquisition Date | Jun. 22, 2021 | ||||||||
| Investment Maturity Date | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | |||||
| Investment Owned, at Fair Value | $ 12 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.05% | ||||||||
| Investment, Identifier [Axis]: LINC Systems, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 7.25%, Due 2/24/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LINCSystemsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Trading Companies & Distributors | Trading Companies & Distributors | Trading Companies & Distributors | Trading Companies & Distributors | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Investment, Acquisition Date | Jun. 22, 2021 | ||||||||
| Investment Maturity Date | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 10,135 | ||||||||
| Investment Owned, at Cost | 9,951 | ||||||||
| Investment Owned, at Fair Value | $ 10,101 | ||||||||
| Fair Value As A Percentage of Member's Equity | 38.83% | ||||||||
| Investment, Identifier [Axis]: LINC Systems, LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate 10.52%, Due 2/24/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LINCSystemsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Trading Companies & Distributors | Trading Companies & Distributors | Trading Companies & Distributors | Trading Companies & Distributors | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 10.42% | 10.42% | 10.42% | 10.42% | |||||
| Investment, Acquisition Date | Jun. 22, 2021 | ||||||||
| Investment Maturity Date | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | |||||
| Investment Owned, at Fair Value | $ (1) | ||||||||
| Fair Value As A Percentage of Member's Equity | 0% | ||||||||
| Investment, Identifier [Axis]: LINC Systems, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate 10.52%, Due 2/24/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LINCSystemsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Trading Companies & Distributors | Trading Companies & Distributors | Trading Companies & Distributors | Trading Companies & Distributors | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 10.42% | 10.42% | 10.42% | 10.42% | |||||
| Investment, Acquisition Date | Jun. 22, 2021 | ||||||||
| Investment Maturity Date | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | Feb. 24, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 10,033 | ||||||||
| Investment Owned, at Cost | 9,895 | ||||||||
| Investment Owned, at Fair Value | $ 9,882 | ||||||||
| Fair Value As A Percentage of Member's Equity | 32.68% | ||||||||
| Investment, Identifier [Axis]: LMG Holdings, Inc First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LMGHoldingsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | Apr. 30, 2021 | ||||||||
| Investment Maturity Date | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | |||||
| Investment, Identifier [Axis]: LMG Holdings, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LMGHoldingsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | Apr. 30, 2021 | ||||||||
| Investment Maturity Date | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 6,802 | ||||||||
| Investment Owned, at Cost | 6,684 | ||||||||
| Investment Owned, at Fair Value | $ 6,687 | ||||||||
| Investment, Identifier [Axis]: LMG Holdings, Inc First Lien Secured Term Loan Due 4/30/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:QuestEventsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Investment, Acquisition Date | Jun. 28, 2021 | ||||||||
| Investment Maturity Date | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 13,466 | ||||||||
| Investment Owned, at Cost | 13,284 | ||||||||
| Investment Owned, at Fair Value | $ 13,193 | ||||||||
| Fair Value As A Percentage of Member's Equity | 43.63% | ||||||||
| Investment, Identifier [Axis]: LMG Holdings, Inc. First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:QuestEventsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Investment, Acquisition Date | Jun. 28, 2021 | ||||||||
| Investment Maturity Date | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | |||||
| Investment Owned, at Fair Value | $ (6) | ||||||||
| Fair Value As A Percentage of Member's Equity | (0.02%) | ||||||||
| Investment, Identifier [Axis]: LMG Holdings, Inc., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 4/30/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LMGHoldingsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | Jun. 28, 2021 | ||||||||
| Investment Maturity Date | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | |||||
| Investment, Identifier [Axis]: LMG Holdings, Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 4/30/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LMGHoldingsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | Jun. 28, 2021 | ||||||||
| Investment Maturity Date | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | Apr. 30, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 6,802 | ||||||||
| Investment Owned, at Cost | 6,680 | ||||||||
| Investment Owned, at Fair Value | $ 6,687 | ||||||||
| Fair Value As A Percentage of Member's Equity | 25.71% | ||||||||
| Investment, Identifier [Axis]: LSCS Holdings, Inc Second Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LSCSHoldingsIncMember | whf:LSCSHoldingsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | whf:SecondLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Life Sciences Tools And Services [Member] | Life Sciences Tools And Services [Member] | Life Sciences Tools And Services [Member] | Life Sciences Tools And Services [Member] | Life Sciences Tools And Services [Member] | Life Sciences Tools And Services [Member] | Life Sciences Tools And Services [Member] | Life Sciences Tools And Services [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | 0.50% | |
| Investment, Basis Spread, Variable Rate | 8% | 8% | 8% | 8% | 8% | 8% | 8% | 8% | |
| Investment Interest Rate | 12.38% | 8.50% | 12.38% | 12.38% | 12.38% | 8.50% | 8.50% | 8.50% | |
| Investment, Acquisition Date | Nov. 23, 2021 | Nov. 23, 2021 | |||||||
| Investment Maturity Date | Dec. 16, 2029 | Dec. 16, 2029 | Dec. 16, 2029 | Dec. 16, 2029 | Dec. 16, 2029 | Dec. 16, 2029 | Dec. 16, 2029 | Dec. 16, 2029 | |
| Investment Owned, Balance, Principal Amount | $ 5,000 | $ 5,000 | |||||||
| Investment Owned, at Cost | 4,935 | 4,925 | |||||||
| Investment Owned, at Fair Value | $ 4,824 | $ 4,925 | |||||||
| Investment, Identifier [Axis]: Lab Logistics, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LabLogisticsLLCMember | whf:LabLogisticsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | |
| Investment Interest Rate | 11.67% | 8.25% | 11.67% | 11.67% | 11.67% | 8.25% | 8.25% | 8.25% | |
| Investment, Acquisition Date | Oct. 16, 2019 | Oct. 16, 2019 | |||||||
| Investment Maturity Date | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | |
| Investment Owned, Balance, Principal Amount | $ 5,131 | $ 5,183 | |||||||
| Investment Owned, at Cost | 5,124 | 5,166 | |||||||
| Investment Owned, at Fair Value | $ 5,131 | $ 5,183 | |||||||
| Investment, Identifier [Axis]: Lab Logistics, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LabLogisticsLLCMember | whf:LabLogisticsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | 7.25% | |
| Investment Interest Rate | 11.67% | 8.25% | 11.67% | 11.67% | 11.67% | 8.25% | 8.25% | 8.25% | |
| Investment, Acquisition Date | Oct. 16, 2019 | Oct. 16, 2019 | |||||||
| Investment Maturity Date | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | Sep. 25, 2023 | |
| Investment Owned, Balance, Principal Amount | $ 5,487 | $ 1,155 | |||||||
| Investment Owned, at Cost | 5,446 | 1,140 | |||||||
| Investment Owned, at Fair Value | $ 5,487 | $ 1,155 | |||||||
| Investment, Identifier [Axis]: Lab Logistics, LLC Preferred Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LabLogisticsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | |||||
| Investment, Basis Spread, Variable Rate | 14% | 14% | 14% | 14% | |||||
| Investment, Acquisition Date | Oct. 29, 2019 | ||||||||
| Investment Owned, Balance, Principal Amount | $ 2 | ||||||||
| Investment Owned, at Cost | 857 | ||||||||
| Investment Owned, at Fair Value | $ 1,018 | ||||||||
| Investment, Interest Rate, Paid in Kind | 14% | 14% | 14% | 14% | |||||
| Investment, Identifier [Axis]: Lenny & Larry's, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LennyLarrysLLCMember | whf:LennyLarrysLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 8.33% | 8.40% | 8.33% | 8.33% | 8.33% | 8.40% | 8.40% | 8.40% | |
| Investment Interest Rate | 12.65% | 9.40% | 12.65% | 12.65% | 12.65% | 9.40% | 9.40% | 9.40% | |
| Investment, Acquisition Date | May 15, 2018 | May 15, 2018 | |||||||
| Investment Maturity Date | May 15, 2023 | May 15, 2023 | May 15, 2023 | May 15, 2023 | May 15, 2023 | May 15, 2023 | May 15, 2023 | May 15, 2023 | |
| Investment Owned, Balance, Principal Amount | $ 11,214 | $ 11,142 | |||||||
| Investment Owned, at Cost | 11,198 | 11,084 | |||||||
| Investment Owned, at Fair Value | $ 10,941 | $ 10,862 | |||||||
| Investment, Interest Rate, Paid in Kind | 1.71% | 1.72% | 1.71% | 1.71% | 1.71% | 1.72% | 1.72% | 1.72% | |
| Investment, Interest Rate, Paid in Cash | 10.94% | 7.68% | 10.94% | 10.94% | 10.94% | 7.68% | 7.68% | 7.68% | |
| Investment, Identifier [Axis]: Leviathan Intermediate Holdco, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LeviathanIntermediateHoldcoLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment Interest Rate | 12.54% | 12.54% | 12.54% | 12.54% | |||||
| Investment, Acquisition Date | Dec. 27, 2022 | ||||||||
| Investment Maturity Date | Dec. 27, 2027 | Dec. 27, 2027 | Dec. 27, 2027 | Dec. 27, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 78 | ||||||||
| Investment Owned, at Cost | 76 | ||||||||
| Investment Owned, at Fair Value | $ 75 | ||||||||
| Investment, Identifier [Axis]: Leviathan Intermediate Holdco, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LeviathanIntermediateHoldcoLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment Interest Rate | 12.54% | 12.54% | 12.54% | 12.54% | |||||
| Investment, Acquisition Date | Dec. 27, 2022 | ||||||||
| Investment Maturity Date | Dec. 27, 2027 | Dec. 27, 2027 | Dec. 27, 2027 | Dec. 27, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 10,452 | ||||||||
| Investment Owned, at Cost | 10,139 | ||||||||
| Investment Owned, at Fair Value | $ 10,138 | ||||||||
| Investment, Identifier [Axis]: Lift Brands, Inc First Lien Secured Term Loan A | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LiftBrandsIncMember | whf:LiftBrandsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | whf:FirstLienSecuredTermLoanAMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 7.50% | 7.50% | 7.50% | 7.50% | 7.50% | 7.50% | 7.50% | 7.50% | |
| Investment Interest Rate | 11.88% | 8.50% | 11.88% | 11.88% | 11.88% | 8.50% | 8.50% | 8.50% | |
| Investment, Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | |||||||
| Investment Maturity Date | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 5,574 | $ 5,631 | |||||||
| Investment Owned, at Cost | 5,531 | 5,570 | |||||||
| Investment Owned, at Fair Value | $ 5,520 | $ 5,546 | |||||||
| Investment, Identifier [Axis]: Lift Brands, Inc First Lien Secured Term Loan B | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LiftBrandsIncMember | whf:LiftBrandsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | whf:FirstLienSecuredTermLoanBMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | |
| Investment, Basis Spread, Variable Rate | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | |
| Investment Interest Rate | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | |
| Investment, Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | |||||||
| Investment Maturity Date | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | Jun. 29, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 1,330 | $ 1,279 | |||||||
| Investment Owned, at Cost | 1,316 | 1,259 | |||||||
| Investment Owned, at Fair Value | $ 1,266 | $ 1,239 | |||||||
| Investment, Interest Rate, Paid in Kind | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | |
| Investment, Interest Rate, Paid in Cash | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | |
| Investment, Identifier [Axis]: Luxury Brand Holdings, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:LuxuryBrandHoldingsIncMember | whf:LuxuryBrandHoldingsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.50% | 10% | 6.50% | 6.50% | 6.50% | 10% | 10% | 10% | |
| Investment Interest Rate | 10.91% | 7.50% | 10.91% | 10.91% | 10.91% | 7.50% | 7.50% | 7.50% | |
| Investment, Acquisition Date | Dec. 04, 2020 | Dec. 04, 2020 | |||||||
| Investment Maturity Date | Jun. 04, 2026 | Jun. 04, 2026 | Jun. 04, 2026 | Jun. 04, 2026 | Jun. 04, 2026 | Jun. 04, 2026 | Jun. 04, 2026 | Jun. 04, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 5,880 | $ 5,940 | |||||||
| Investment Owned, at Cost | 5,807 | 5,844 | |||||||
| Investment Owned, at Fair Value | $ 5,880 | $ 5,940 | |||||||
| Investment, Identifier [Axis]: MBS Highway, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MbsHighwayLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment Interest Rate | 11.92% | 11.92% | 11.92% | 11.92% | |||||
| Investment, Acquisition Date | Oct. 13, 2022 | ||||||||
| Investment Maturity Date | Oct. 13, 2027 | Oct. 13, 2027 | Oct. 13, 2027 | Oct. 13, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 9,476 | ||||||||
| Investment Owned, at Cost | 9,250 | ||||||||
| Investment Owned, at Fair Value | $ 9,250 | ||||||||
| Investment, Identifier [Axis]: MEP-TS Midco, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MEP-TSMidcoLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 10.38% | 10.38% | 10.38% | 10.38% | |||||
| Investment, Acquisition Date | Jan. 21, 2021 | ||||||||
| Investment Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Investment Owned, at Fair Value | $ 22 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.07% | ||||||||
| Investment, Identifier [Axis]: MEP-TS Midco, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MEP-TSMidcoLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 10.38% | 10.38% | 10.38% | 10.38% | |||||
| Investment, Acquisition Date | Jan. 21, 2021 | ||||||||
| Investment Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 13,353 | ||||||||
| Investment Owned, at Cost | 13,162 | ||||||||
| Investment Owned, at Fair Value | $ 13,353 | ||||||||
| Fair Value As A Percentage of Member's Equity | 44.16% | ||||||||
| Investment, Identifier [Axis]: MEP-TS Midco, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/31/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MEP-TSMidcoLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Jan. 21, 2021 | ||||||||
| Investment Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Investment Owned, at Fair Value | $ 28 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.11% | ||||||||
| Investment, Identifier [Axis]: MEP-TS Midco, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/31/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MEP-TSMidcoLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Jan. 21, 2021 | ||||||||
| Investment Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 13,490 | ||||||||
| Investment Owned, at Cost | 13,247 | ||||||||
| Investment Owned, at Fair Value | $ 13,490 | ||||||||
| Fair Value As A Percentage of Member's Equity | 51.86% | ||||||||
| Investment, Identifier [Axis]: MSI Information Services, Inc First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MSIInformationServicesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Investment Interest Rate | 12.17% | 12.17% | 12.17% | 12.17% | |||||
| Investment, Acquisition Date | Apr. 25, 2022 | ||||||||
| Investment Maturity Date | Apr. 24, 2026 | Apr. 24, 2026 | Apr. 24, 2026 | Apr. 24, 2026 | |||||
| Investment Owned, at Fair Value | $ (9) | ||||||||
| Investment, Identifier [Axis]: MSI Information Services, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MSIInformationServicesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Investment Interest Rate | 12.17% | 12.17% | 12.17% | 12.17% | |||||
| Investment, Acquisition Date | Apr. 25, 2022 | ||||||||
| Investment Maturity Date | Apr. 24, 2026 | Apr. 24, 2026 | Apr. 24, 2026 | Apr. 24, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 7,751 | ||||||||
| Investment Owned, at Cost | 7,623 | ||||||||
| Investment Owned, at Fair Value | $ 7,554 | ||||||||
| Investment, Identifier [Axis]: Manchester Acquisition Sub LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ManchesterAcquisitionSubLLCMember | whf:ManchesterAcquisitionSubLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |
| Investment, Interest Rate, Floor | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | |
| Investment, Basis Spread, Variable Rate | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | 5.75% | |
| Investment Interest Rate | 10.30% | 6.50% | 10.30% | 10.30% | 10.30% | 6.50% | 6.50% | 6.50% | |
| Investment, Acquisition Date | Nov. 16, 2021 | Nov. 16, 2021 | |||||||
| Investment Maturity Date | Nov. 16, 2026 | Nov. 16, 2026 | Nov. 16, 2026 | Nov. 16, 2026 | Nov. 16, 2026 | Nov. 16, 2026 | Nov. 16, 2026 | Nov. 16, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 7,920 | $ 12,000 | |||||||
| Investment Owned, at Cost | 7,578 | 11,348 | |||||||
| Investment Owned, at Fair Value | $ 6,731 | $ 11,340 | |||||||
| Investment, Identifier [Axis]: Marlin DTC-LS Midco 2, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MarlinDTC-LSMidco2LLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | Aug. 06, 2021 | ||||||||
| Investment Maturity Date | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 4,277 | ||||||||
| Investment Owned, at Cost | 4,200 | ||||||||
| Investment Owned, at Fair Value | $ 4,206 | ||||||||
| Investment, Identifier [Axis]: Marlin DTC-LS Midco 2, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 7/1/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MarlinDTC-LSMidco2LLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | Jul. 19, 2019 | ||||||||
| Investment Maturity Date | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | |||||
| Investment Owned, at Fair Value | $ 11 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.04% | ||||||||
| Investment, Identifier [Axis]: Marlin DTC-LS Midco 2, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 7/1/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MarlinDTC-LSMidco2LLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | Jul. 19, 2019 | ||||||||
| Investment Maturity Date | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 15,342 | ||||||||
| Investment Owned, at Cost | 15,153 | ||||||||
| Investment Owned, at Fair Value | $ 15,342 | ||||||||
| Fair Value As A Percentage of Member's Equity | 58.98% | ||||||||
| Investment, Identifier [Axis]: Marlin DTC-LS Midco 2., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.23%, Due 7/1/25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MarlinDTC-LSMidco2LLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Investment, Acquisition Date | Jul. 19, 2019 | ||||||||
| Investment Maturity Date | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | |||||
| Investment Owned, at Fair Value | $ 8 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.03% | ||||||||
| Investment, Identifier [Axis]: Marlin DTC-LS Midco 2., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.23%, Due 7/1/25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MarlinDTC-LSMidco2LLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Investment, Acquisition Date | Jul. 19, 2019 | ||||||||
| Investment Maturity Date | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | Jul. 01, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 19,105 | ||||||||
| Investment Owned, at Cost | 18,920 | ||||||||
| Investment Owned, at Fair Value | $ 19,105 | ||||||||
| Fair Value As A Percentage of Member's Equity | 63.18% | ||||||||
| Investment, Identifier [Axis]: Max Solutions Inc. Common Stock | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MaxSolutionsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Paper Packaging | Paper Packaging | Paper Packaging | Paper Packaging | |||||
| Investment, Acquisition Date | Sep. 29, 2022 | ||||||||
| Investment Owned, Balance, Principal Amount | $ 4 | ||||||||
| Investment Owned, at Cost | 400 | ||||||||
| Investment Owned, at Fair Value | $ 283 | ||||||||
| Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.23%, Due 9/29/28 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MaxSolutionsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Paper Packaging | Paper Packaging | Paper Packaging | Paper Packaging | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Investment, Acquisition Date | Oct. 07, 2022 | ||||||||
| Investment Maturity Date | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | |||||
| Investment Owned, at Fair Value | $ (26) | ||||||||
| Fair Value As A Percentage of Member's Equity | (0.09%) | ||||||||
| Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Revolving Loan, Floor 1.00%, Spread CDOR plus 6.50%, Rate 11.23%, Due 9/29/28 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MaxSolutionsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Paper Packaging | Paper Packaging | Paper Packaging | Paper Packaging | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Investment, Acquisition Date | Oct. 07, 2022 | ||||||||
| Investment Maturity Date | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | |||||
| Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.23%, Due 9/29/28 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MaxSolutionsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Paper Packaging | Paper Packaging | Paper Packaging | Paper Packaging | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Investment, Acquisition Date | Oct. 07, 2022 | ||||||||
| Investment Maturity Date | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | |||||
| Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.23%, Due 9/29/28 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MaxSolutionsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Paper Packaging | Paper Packaging | Paper Packaging | Paper Packaging | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Investment, Acquisition Date | Oct. 07, 2022 | ||||||||
| Investment Maturity Date | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | Sep. 29, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 8,244 | ||||||||
| Investment Owned, at Cost | 8,085 | ||||||||
| Investment Owned, at Fair Value | $ 8,085 | ||||||||
| Fair Value As A Percentage of Member's Equity | 26.74% | ||||||||
| Investment, Identifier [Axis]: Maxitransfers Blocker Corp First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MaxitransfersBlockerCorpMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Consumer Finance [Member] | Consumer Finance [Member] | Consumer Finance [Member] | Consumer Finance [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 8.50% | 8.50% | 8.50% | 8.50% | |||||
| Investment Interest Rate | 9.50% | 9.50% | 9.50% | 9.50% | |||||
| Investment, Acquisition Date | Oct. 07, 2020 | ||||||||
| Investment Maturity Date | Oct. 07, 2025 | Oct. 07, 2025 | Oct. 07, 2025 | Oct. 07, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 1,038 | ||||||||
| Investment Owned, at Cost | 1,019 | ||||||||
| Investment Owned, at Fair Value | $ 1,038 | ||||||||
| Investment, Identifier [Axis]: Maxitransfers Blocker Corp First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MaxitransfersBlockerCorpMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Consumer Finance [Member] | Consumer Finance [Member] | Consumer Finance [Member] | Consumer Finance [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 8.50% | 8.50% | 8.50% | 8.50% | |||||
| Investment Interest Rate | 9.50% | 9.50% | 9.50% | 9.50% | |||||
| Investment, Acquisition Date | Oct. 07, 2020 | ||||||||
| Investment Maturity Date | Oct. 07, 2025 | Oct. 07, 2025 | Oct. 07, 2025 | Oct. 07, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 8,590 | ||||||||
| Investment Owned, at Cost | 8,436 | ||||||||
| Investment Owned, at Fair Value | $ 8,590 | ||||||||
| Investment, Identifier [Axis]: Meta Buyer LLC, First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 11/1/2027 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MetaBuyerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Dec. 16, 2021 | ||||||||
| Investment Maturity Date | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | |||||
| Investment, Identifier [Axis]: Meta Buyer LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 11/1/2027 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MetaBuyerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Dec. 16, 2021 | ||||||||
| Investment Maturity Date | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 251 | ||||||||
| Investment Owned, at Cost | 246 | ||||||||
| Investment Owned, at Fair Value | $ 246 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.95% | ||||||||
| Investment, Identifier [Axis]: Meta Buyer LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 11/1/2027 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MetaBuyerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Dec. 16, 2021 | ||||||||
| Investment Maturity Date | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 991 | ||||||||
| Investment Owned, at Cost | 972 | ||||||||
| Investment Owned, at Fair Value | $ 972 | ||||||||
| Fair Value As A Percentage of Member's Equity | 3.74% | ||||||||
| Investment, Identifier [Axis]: Meta Buyer LLC, First lien Secured Term Loan, Floor 1.00%, Spread E plus 6.00%, Rate 7.00%, Due 11/1/2027 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MetaBuyerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whf:EuroInterbankOfferedRateMember | whf:EuroInterbankOfferedRateMember | whf:EuroInterbankOfferedRateMember | whf:EuroInterbankOfferedRateMember | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Dec. 16, 2021 | ||||||||
| Investment Maturity Date | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | |||||
| Investment Owned, Balance, Principal Amount | € | € 12,411 | ||||||||
| Investment Owned, at Cost | $ 13,737 | ||||||||
| Investment Owned, at Fair Value | $ 13,843 | ||||||||
| Fair Value As A Percentage of Member's Equity | 53.21% | ||||||||
| Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF plus 6.00%, Rate 10.81%, Due 11/1/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MetaBuyerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 10.81% | 10.81% | 10.81% | 10.81% | |||||
| Investment, Acquisition Date | Oct. 01, 2022 | ||||||||
| Investment Maturity Date | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 892 | ||||||||
| Investment Owned, at Cost | 878 | ||||||||
| Investment Owned, at Fair Value | $ 876 | ||||||||
| Fair Value As A Percentage of Member's Equity | 2.90% | ||||||||
| Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 6.00%, Rate 10.81%, Due 11/1/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MetaBuyerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 10.81% | 10.81% | 10.81% | 10.81% | |||||
| Investment, Acquisition Date | Dec. 16, 2021 | ||||||||
| Investment Maturity Date | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | |||||
| Investment Owned, at Fair Value | $ (3) | ||||||||
| Fair Value As A Percentage of Member's Equity | (0.01%) | ||||||||
| Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Term Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 8.17%, Due 11/20/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MetaBuyerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whf:EuroInterbankOfferedRateMember | whf:EuroInterbankOfferedRateMember | whf:EuroInterbankOfferedRateMember | whf:EuroInterbankOfferedRateMember | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 8.17% | 8.17% | 8.17% | 8.17% | |||||
| Investment, Acquisition Date | Dec. 16, 2021 | ||||||||
| Investment Maturity Date | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | |||||
| Investment Owned, Balance, Principal Amount | € | € 12,287 | ||||||||
| Investment Owned, at Cost | $ 13,643 | ||||||||
| Investment Owned, at Fair Value | $ 12,876 | ||||||||
| Fair Value As A Percentage of Member's Equity | 42.57% | ||||||||
| Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.00%, Rate 10.62%, Due 11/1/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MetaBuyerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | Pharmaceuticals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 10.62% | 10.62% | 10.62% | 10.62% | |||||
| Investment, Acquisition Date | Dec. 16, 2021 | ||||||||
| Investment Maturity Date | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | Nov. 01, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 981 | ||||||||
| Investment Owned, at Cost | 966 | ||||||||
| Investment Owned, at Fair Value | $ 963 | ||||||||
| Fair Value As A Percentage of Member's Equity | 3.18% | ||||||||
| Investment, Identifier [Axis]: Mikawaya Holdings, LLC, First Lien Secured Term Loan, Floor 1.25%, Spread L plus 5.50%, Rate 6.75%, Due 1/29/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MikawayaHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1.25% | 1.25% | 1.25% | 1.25% | |||||
| Investment, Basis Spread, Variable Rate | 5.50% | 5.50% | 5.50% | 5.50% | |||||
| Investment Interest Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment, Acquisition Date | Feb. 18, 2020 | ||||||||
| Investment Maturity Date | Jan. 29, 2025 | Jan. 29, 2025 | Jan. 29, 2025 | Jan. 29, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 3,026 | ||||||||
| Investment Owned, at Cost | 2,988 | ||||||||
| Investment Owned, at Fair Value | $ 3,026 | ||||||||
| Fair Value As A Percentage of Member's Equity | 11.63% | ||||||||
| Investment, Identifier [Axis]: Mills Fleet Farm Group, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MillsFleetFarmGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Department Stores [Member] | Department Stores [Member] | Department Stores [Member] | Department Stores [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Investment, Acquisition Date | Oct. 24, 2018 | ||||||||
| Investment Maturity Date | Oct. 24, 2024 | Oct. 24, 2024 | Oct. 24, 2024 | Oct. 24, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 13,538 | ||||||||
| Investment Owned, at Cost | 13,331 | ||||||||
| Investment Owned, at Fair Value | $ 13,538 | ||||||||
| Investment, Identifier [Axis]: Motivational CIV, LLC Class B Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MotivationalCIVLLCMember | whf:MotivationalCIVLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:ClassBUnitsMember | whf:ClassBUnitsMember | whf:ClassBUnitsMember | whf:ClassBUnitsMember | whf:ClassBUnitsMember | whf:ClassBUnitsMember | whf:ClassBUnitsMember | whf:ClassBUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |
| Investment, Acquisition Date | Jul. 12, 2021 | Jul. 12, 2021 | |||||||
| Investment Owned, Balance, Principal Amount | $ 1,250 | $ 1,250 | |||||||
| Investment Owned, at Cost | 1,250 | 1,250 | |||||||
| Investment Owned, at Fair Value | $ 517 | $ 1,250 | |||||||
| Investment, Identifier [Axis]: Motivational Marketing, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MotivationalMarketingLLCMember | whf:MotivationalMarketingLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:BaseRateMember | London Interbank Offered Rate (LIBOR) [Member] | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 5.56% | 6.25% | 5.56% | 5.56% | 5.56% | 6.25% | 6.25% | 6.25% | |
| Investment Interest Rate | 11.21% | 7.25% | 11.21% | 11.21% | 11.21% | 7.25% | 7.25% | 7.25% | |
| Investment, Acquisition Date | Jul. 12, 2021 | Jul. 12, 2021 | |||||||
| Investment Maturity Date | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 158 | ||||||||
| Investment Owned, at Cost | 155 | ||||||||
| Investment Owned, at Fair Value | $ 133 | $ 7 | |||||||
| Investment, Identifier [Axis]: Motivational Marketing, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MotivationalMarketingLLCMember | whf:MotivationalMarketingLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | Air Freight & Logistics | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Investment Interest Rate | 10.59% | 7.25% | 10.59% | 10.59% | 10.59% | 7.25% | 7.25% | 7.25% | |
| Investment, Acquisition Date | Jul. 12, 2021 | Jul. 12, 2021 | |||||||
| Investment Maturity Date | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | Jul. 12, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 11,113 | $ 11,789 | |||||||
| Investment Owned, at Cost | 10,956 | 11,575 | |||||||
| Investment Owned, at Fair Value | $ 10,749 | $ 11,646 | |||||||
| Investment, Identifier [Axis]: NMFC Senior Loan Program I LLC Units, Equity | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:NmfcSeniorLoanProgramILlcUnitsMember | ||||||||
| Investment, Type [Extensible Enumeration] | Equity Investments | Equity Investments | Equity Investments | Equity Investments | |||||
| Investment Owned, at Fair Value | 9,269 | ||||||||
| Investment, Identifier [Axis]: NNA Services, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:NNAServicesLLCMember | whf:NNAServicesLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | |
| Investment Interest Rate | 11.48% | 7.75% | 11.48% | 11.48% | 11.48% | 7.75% | 7.75% | 7.75% | |
| Investment, Acquisition Date | Aug. 27, 2021 | Aug. 27, 2021 | |||||||
| Investment Maturity Date | Aug. 27, 2026 | Aug. 27, 2026 | Aug. 27, 2026 | Aug. 27, 2026 | Aug. 27, 2026 | Aug. 27, 2026 | Aug. 27, 2026 | Aug. 27, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 11,302 | $ 11,594 | |||||||
| Investment Owned, at Cost | 11,199 | 11,459 | |||||||
| Investment Owned, at Fair Value | $ 10,833 | $ 11,460 | |||||||
| Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 10.92%, Due 1/21/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:NPAVLessorCorp.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.92% | 10.92% | 10.92% | 10.92% | |||||
| Investment, Acquisition Date | Mar. 01, 2022 | ||||||||
| Investment Maturity Date | Jan. 21, 2027 | Jan. 21, 2027 | Jan. 21, 2027 | Jan. 21, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 290 | ||||||||
| Investment Owned, at Cost | 285 | ||||||||
| Investment Owned, at Fair Value | $ 247 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.82% | ||||||||
| Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 10.92%, Due 1/21/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:NPAVLessorCorp.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.92% | 10.92% | 10.92% | 10.92% | |||||
| Investment, Acquisition Date | Mar. 01, 2022 | ||||||||
| Investment Maturity Date | Jan. 21, 2027 | Jan. 21, 2027 | Jan. 21, 2027 | Jan. 21, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 8,924 | ||||||||
| Investment Owned, at Cost | 8,778 | ||||||||
| Investment Owned, at Fair Value | $ 8,301 | ||||||||
| Fair Value As A Percentage of Member's Equity | 27.45% | ||||||||
| Investment, Identifier [Axis]: Naviga Inc First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:NavigaIncMember | whf:NavigaIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:BaseRateMember | London Interbank Offered Rate (LIBOR) [Member] | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.63% | 7% | 6.63% | 6.63% | 6.63% | 7% | 7% | 7% | |
| Investment Interest Rate | 12.19% | 8% | 12.19% | 12.19% | 12.19% | 8% | 8% | 8% | |
| Investment, Acquisition Date | Oct. 06, 2022 | Jun. 14, 2019 | |||||||
| Investment Maturity Date | Dec. 29, 2023 | Dec. 29, 2022 | Dec. 29, 2023 | Dec. 29, 2023 | Dec. 29, 2023 | Dec. 29, 2022 | Dec. 29, 2022 | Dec. 29, 2022 | |
| Investment Owned, Balance, Principal Amount | $ 267 | $ 169 | |||||||
| Investment Owned, at Cost | 267 | 168 | |||||||
| Investment Owned, at Fair Value | $ 258 | $ 169 | |||||||
| Investment, Identifier [Axis]: Naviga Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:NavigaIncMember | whf:NavigaIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | Application Software | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 7% | 7% | 7% | 7% | 7% | 7% | 7% | 7% | |
| Investment Interest Rate | 11.68% | 8% | 11.68% | 11.68% | 11.68% | 8% | 8% | 8% | |
| Investment, Acquisition Date | Oct. 06, 2022 | Jun. 14, 2019 | |||||||
| Investment Maturity Date | Dec. 29, 2023 | Dec. 29, 2022 | Dec. 29, 2023 | Dec. 29, 2023 | Dec. 29, 2023 | Dec. 29, 2022 | Dec. 29, 2022 | Dec. 29, 2022 | |
| Investment Owned, Balance, Principal Amount | $ 3,180 | $ 3,213 | |||||||
| Investment Owned, at Cost | 3,177 | 3,195 | |||||||
| Investment Owned, at Fair Value | $ 3,084 | $ 3,213 | |||||||
| Investment, Identifier [Axis]: Nelson Worldwide, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:NelsonWorldwideLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 10.25% | 10.25% | 10.25% | 10.25% | |||||
| Investment Interest Rate | 11.25% | 11.25% | 11.25% | 11.25% | |||||
| Investment, Acquisition Date | Jan. 09, 2018 | ||||||||
| Investment Maturity Date | Jan. 09, 2023 | Jan. 09, 2023 | Jan. 09, 2023 | Jan. 09, 2023 | |||||
| Investment Owned, Balance, Principal Amount | $ 10,027 | ||||||||
| Investment Owned, at Cost | 9,976 | ||||||||
| Investment Owned, at Fair Value | $ 9,826 | ||||||||
| Investment, Interest Rate, Paid in Kind | 1% | 1% | 1% | 1% | |||||
| Investment, Interest Rate, Paid in Cash | 10.25% | 10.25% | 10.25% | 10.25% | |||||
| Investment, Identifier [Axis]: PFB Holdco, Inc Class A Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PFBHoldcoIncMember | whf:PFBHoldcoIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | whf:ClassAUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Data Processing & Outsourced Services | Building Products | Building Products | Building Products | Data Processing & Outsourced Services | Data Processing & Outsourced Services | Data Processing & Outsourced Services | |
| Investment, Acquisition Date | Dec. 17, 2021 | Dec. 17, 2021 | |||||||
| Investment Owned, Balance, Principal Amount | $ 1 | $ 1 | |||||||
| Investment Owned, at Cost | 423 | 423 | |||||||
| Investment Owned, at Fair Value | $ 786 | $ 427 | |||||||
| Investment, Identifier [Axis]: PFB Holdco, Inc First Lien Secured Revolving Loan Floor 2.45 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PFBHoldcoIncMember | whf:PFBHoldcoIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Dollar Offered Rate | whf:CanadaPrimeRateMember | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | whf:CanadaPrimeRateMember | whf:CanadaPrimeRateMember | whf:CanadaPrimeRateMember | |
| Investment, Interest Rate, Floor | 1% | 2.45% | 1% | 1% | 1% | 2.45% | 2.45% | 2.45% | |
| Investment, Basis Spread, Variable Rate | 6% | 5.50% | 6% | 6% | 6% | 5.50% | 5.50% | 5.50% | |
| Investment Interest Rate | 10.52% | 7.95% | 10.52% | 10.52% | 10.52% | 7.95% | 7.95% | 7.95% | |
| Investment, Acquisition Date | Dec. 17, 2021 | Dec. 17, 2021 | |||||||
| Investment Maturity Date | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | |
| Investment Owned, at Fair Value | $ 2 | ||||||||
| Investment, Identifier [Axis]: PFB Holdco, Inc First Lien Secured Revolving Loan Floor 3.25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PFBHoldcoIncMember | whf:PFBHoldcoIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | us-gaap:PrimeRateMember | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | |
| Investment, Interest Rate, Floor | 1% | 3.25% | 1% | 1% | 1% | 3.25% | 3.25% | 3.25% | |
| Investment, Basis Spread, Variable Rate | 6% | 5.50% | 6% | 6% | 6% | 5.50% | 5.50% | 5.50% | |
| Investment Interest Rate | 10.17% | 8.75% | 10.17% | 10.17% | 10.17% | 8.75% | 8.75% | 8.75% | |
| Investment, Acquisition Date | Dec. 17, 2021 | Dec. 17, 2021 | |||||||
| Investment Maturity Date | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | |
| Investment, Identifier [Axis]: PFB Holdco, Inc First Lien Secured Term Loan Floor 2.45 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PFBHoldcoIncMember | whf:PFBHoldcoIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Dollar Offered Rate | whf:CanadaPrimeRateMember | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | whf:CanadaPrimeRateMember | whf:CanadaPrimeRateMember | whf:CanadaPrimeRateMember | |
| Investment, Interest Rate, Floor | 1% | 2.45% | 1% | 1% | 1% | 2.45% | 2.45% | 2.45% | |
| Investment, Basis Spread, Variable Rate | 6% | 5.50% | 6% | 6% | 6% | 5.50% | 5.50% | 5.50% | |
| Investment Interest Rate | 10.52% | 7.95% | 10.52% | 10.52% | 10.52% | 7.95% | 7.95% | 7.95% | |
| Investment, Acquisition Date | Dec. 17, 2021 | Dec. 17, 2021 | |||||||
| Investment Maturity Date | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 8,935 | $ 9,027 | |||||||
| Investment Owned, at Cost | 6,879 | 6,923 | |||||||
| Investment Owned, at Fair Value | $ 6,504 | $ 6,998 | |||||||
| Investment, Identifier [Axis]: PFB Holdco, Inc First Lien Secured Term Loan Floor 3.25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PFBHoldcoIncMember | whf:PFBHoldcoIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | us-gaap:PrimeRateMember | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | |
| Investment, Interest Rate, Floor | 1% | 3.25% | 1% | 1% | 1% | 3.25% | 3.25% | 3.25% | |
| Investment, Basis Spread, Variable Rate | 6% | 5.50% | 6% | 6% | 6% | 5.50% | 5.50% | 5.50% | |
| Investment Interest Rate | 10.17% | 8.75% | 10.17% | 10.17% | 10.17% | 8.75% | 8.75% | 8.75% | |
| Investment, Acquisition Date | Dec. 17, 2021 | Dec. 17, 2021 | |||||||
| Investment Maturity Date | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | Dec. 17, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 2,176 | $ 2,198 | |||||||
| Investment Owned, at Cost | 2,141 | 2,154 | |||||||
| Investment Owned, at Fair Value | $ 2,144 | $ 2,154 | |||||||
| Investment, Identifier [Axis]: PG Dental New Jersey Parent, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PGDentalNewJerseyParentLLCMember | whf:PGDentalNewJerseyParentLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 8.25% | 9.25% | 8.25% | 8.25% | 8.25% | 9.25% | 9.25% | 9.25% | |
| Investment Interest Rate | 12.57% | 10.25% | 12.57% | 12.57% | 12.57% | 10.25% | 10.25% | 10.25% | |
| Investment, Acquisition Date | Nov. 25, 2020 | Nov. 25, 2020 | |||||||
| Investment Maturity Date | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 352 | $ 702 | |||||||
| Investment Owned, at Cost | 347 | 689 | |||||||
| Investment Owned, at Fair Value | $ 300 | $ 631 | |||||||
| Investment, Interest Rate, Paid in Kind | 0.75% | 1.50% | 0.75% | 0.75% | 0.75% | 1.50% | 1.50% | 1.50% | |
| Investment, Interest Rate, Paid in Cash | 11.82% | 8.75% | 11.82% | 11.82% | 11.82% | 8.75% | 8.75% | 8.75% | |
| Investment, Identifier [Axis]: PG Dental New Jersey Parent, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PGDentalNewJerseyParentLLCMember | whf:PGDentalNewJerseyParentLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | Health Care Services [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 9% | 9.25% | 9% | 9% | 9% | 9.25% | 9.25% | 9.25% | |
| Investment Interest Rate | 13.32% | 10.25% | 13.32% | 13.32% | 13.32% | 10.25% | 10.25% | 10.25% | |
| Investment, Acquisition Date | Nov. 25, 2020 | Nov. 25, 2020 | |||||||
| Investment Maturity Date | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | Nov. 25, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 13,495 | $ 15,448 | |||||||
| Investment Owned, at Cost | 13,324 | 15,178 | |||||||
| Investment Owned, at Fair Value | $ 12,415 | $ 14,212 | |||||||
| Investment, Interest Rate, Paid in Kind | 0.75% | 1.50% | 0.75% | 0.75% | 0.75% | 1.50% | 1.50% | 1.50% | |
| Investment, Interest Rate, Paid in Cash | 12.57% | 8.75% | 12.57% | 12.57% | 12.57% | 8.75% | 8.75% | 8.75% | |
| Investment, Identifier [Axis]: PPS CR Acquisition, Inc First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PPSCRAcquisitionIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Heavy Electrical Equipment [Member] | Heavy Electrical Equipment [Member] | Heavy Electrical Equipment [Member] | Heavy Electrical Equipment [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Investment Interest Rate | 10.98% | 10.98% | 10.98% | 10.98% | |||||
| Investment, Acquisition Date | Jul. 11, 2022 | ||||||||
| Investment Maturity Date | Jun. 25, 2026 | Jun. 25, 2026 | Jun. 25, 2026 | Jun. 25, 2026 | |||||
| Investment Owned, at Fair Value | $ (34) | ||||||||
| Investment, Identifier [Axis]: PPS CR Acquisition, Inc First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PPSCRAcquisitionIncMember | whf:PPSCRAcquisitionIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Heavy Electrical Equipment [Member] | Heavy Electrical Equipment [Member] | Heavy Electrical Equipment [Member] | Heavy Electrical Equipment [Member] | Heavy Electrical Equipment [Member] | Heavy Electrical Equipment [Member] | Heavy Electrical Equipment [Member] | Heavy Electrical Equipment [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:BaseRateMember | London Interbank Offered Rate (LIBOR) [Member] | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 5.96% | 5.96% | 5.96% | 5.96% | |||||
| Investment Interest Rate | 11.36% | 7.25% | 11.36% | 11.36% | 11.36% | 7.25% | 7.25% | 7.25% | |
| Investment, Acquisition Date | Jun. 25, 2021 | Jun. 25, 2021 | |||||||
| Investment Maturity Date | Jun. 25, 2024 | Jun. 25, 2024 | Jun. 25, 2024 | Jun. 25, 2024 | Jun. 25, 2024 | Jun. 25, 2024 | Jun. 25, 2024 | Jun. 25, 2024 | |
| Investment Owned, Balance, Principal Amount | $ 836 | $ 104 | |||||||
| Investment Owned, at Cost | 828 | 103 | |||||||
| Investment Owned, at Fair Value | $ 780 | $ 113 | |||||||
| Investment, Identifier [Axis]: PPS CR Acquisition, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PPSCRAcquisitionIncMember | whf:PPSCRAcquisitionIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Heavy Electrical Equipment [Member] | Heavy Electrical Equipment [Member] | Heavy Electrical Equipment [Member] | Heavy Electrical Equipment [Member] | Heavy Electrical Equipment [Member] | Heavy Electrical Equipment [Member] | Heavy Electrical Equipment [Member] | Heavy Electrical Equipment [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | |
| Investment Interest Rate | 10.98% | 7.25% | 10.98% | 10.98% | 10.98% | 7.25% | 7.25% | 7.25% | |
| Investment, Acquisition Date | Jun. 25, 2021 | Jun. 25, 2021 | |||||||
| Investment Maturity Date | Jun. 25, 2026 | Jun. 25, 2026 | Jun. 25, 2026 | Jun. 25, 2026 | Jun. 25, 2026 | Jun. 25, 2026 | Jun. 25, 2026 | Jun. 25, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 14,130 | $ 11,123 | |||||||
| Investment Owned, at Cost | 13,922 | 10,924 | |||||||
| Investment Owned, at Fair Value | $ 13,774 | $ 10,975 | |||||||
| Investment, Identifier [Axis]: PS Lightwave, Inc., First Lien Secured Delayed Draw Loan, Floor 1.50%, Spread L plus 6.75%, Rate 8.25%, Due 3/10/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PSLightwaveInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment Interest Rate | 8.25% | 8.25% | 8.25% | 8.25% | |||||
| Investment, Acquisition Date | May 19, 2020 | ||||||||
| Investment Maturity Date | Mar. 10, 2025 | Mar. 10, 2025 | Mar. 10, 2025 | Mar. 10, 2025 | |||||
| Investment Owned, at Fair Value | $ 5 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.02% | ||||||||
| Investment, Identifier [Axis]: PS Lightwave, Inc., First Lien Secured Term Loan, Floor 1.50%, Spread L plus 6.75%, Rate 8.25%, Due 3/10/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PSLightwaveInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment Interest Rate | 8.25% | 8.25% | 8.25% | 8.25% | |||||
| Investment, Acquisition Date | May 19, 2020 | ||||||||
| Investment Maturity Date | Mar. 10, 2025 | Mar. 10, 2025 | Mar. 10, 2025 | Mar. 10, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 7,304 | ||||||||
| Investment Owned, at Cost | 7,207 | ||||||||
| Investment Owned, at Fair Value | $ 7,230 | ||||||||
| Fair Value As A Percentage of Member's Equity | 27.79% | ||||||||
| Investment, Identifier [Axis]: Patagonia Hold co Llc First Lien Secured Term Loans | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PatagoniaHoldcoLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Alternative Carriers | Alternative Carriers | Alternative Carriers | Alternative Carriers | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Investment, Basis Spread, Variable Rate | 5.75% | 5.75% | 5.75% | 5.75% | |||||
| Investment Interest Rate | 9.96% | 9.96% | 9.96% | 9.96% | |||||
| Investment, Acquisition Date | Aug. 05, 2022 | ||||||||
| Investment Maturity Date | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | Aug. 01, 2029 | |||||
| Investment Owned, Balance, Principal Amount | $ 14,588 | ||||||||
| Investment Owned, at Cost | 12,105 | ||||||||
| Investment Owned, at Fair Value | $ 12,068 | ||||||||
| Investment, Identifier [Axis]: Pennsylvania Machine Works., First Lien Secured Term Loan, Floor 1.00%, Spread SF plus 6.25%, Rate 11.09%, Due 3/8/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PennsylvaniaMachineWorksLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery | Industrial Machinery | Industrial Machinery | Industrial Machinery | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 11.09% | 11.09% | 11.09% | 11.09% | |||||
| Investment, Acquisition Date | Mar. 25, 2022 | ||||||||
| Investment Maturity Date | Mar. 08, 2027 | Mar. 08, 2027 | Mar. 08, 2027 | Mar. 08, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 6,907 | ||||||||
| Investment Owned, at Cost | 6,821 | ||||||||
| Investment Owned, at Fair Value | $ 6,801 | ||||||||
| Fair Value As A Percentage of Member's Equity | 22.49% | ||||||||
| Investment, Identifier [Axis]: PlayMonster LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | PlayMonster LLC [Member]. | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Jun. 07, 2021 | ||||||||
| Investment Maturity Date | Jun. 07, 2026 | Jun. 07, 2026 | Jun. 07, 2026 | Jun. 07, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 224 | ||||||||
| Investment Owned, at Cost | 221 | ||||||||
| Investment Owned, at Fair Value | $ (828) | ||||||||
| Investment, Identifier [Axis]: PlayMonster LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | PlayMonster LLC [Member]. | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Identifier [Axis]: PlayMonster LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | PlayMonster LLC [Member]. | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Jun. 07, 2021 | ||||||||
| Investment Maturity Date | Jun. 07, 2026 | Jun. 07, 2026 | Jun. 07, 2026 | Jun. 07, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 6,000 | ||||||||
| Investment Owned, at Cost | 5,894 | ||||||||
| Investment Owned, at Fair Value | $ 3,900 | ||||||||
| Investment, Identifier [Axis]: Playmonster Group Equity Inc Common Equity | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PlaymonsterGroupEquityIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |||||
| Investment, Identifier [Axis]: Playmonster Group Equity Inc Preferred Equity | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PlaymonsterGroupEquityIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | |||||
| Investment, Identifier [Axis]: Playmonster Group Equity, Inc Common Stock | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PlaymonsterGroupEquityIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Acquisition Date | Jan. 24, 2022 | ||||||||
| Investment Owned, Balance, Principal Amount | $ 72 | ||||||||
| Investment Owned, at Cost | $ 460 | ||||||||
| Investment, Identifier [Axis]: Playmonster Group Equity, Inc. Preferred Stock | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PlaymonsterGroupEquityIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Basis Spread, Variable Rate | 14% | 14% | 14% | 14% | |||||
| Investment, Acquisition Date | Jan. 24, 2022 | ||||||||
| Investment Owned, Balance, Principal Amount | $ 36 | ||||||||
| Investment Owned, at Cost | $ 3,600 | ||||||||
| Investment, Interest Rate, Paid in Kind | 14% | 14% | 14% | 14% | |||||
| Investment, Identifier [Axis]: Playmonster Group LLC First Lien Secured Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PlaymonsterGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment Owned, at Fair Value | $ 2,977 | ||||||||
| Investment, Identifier [Axis]: Playmonster Group LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PlaymonsterGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 9% | 9% | 9% | 9% | |||||
| Investment, Acquisition Date | Jan. 24, 2022 | ||||||||
| Investment Maturity Date | Jun. 08, 2026 | Jun. 08, 2026 | Jun. 08, 2026 | Jun. 08, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 3,664 | ||||||||
| Investment Owned, at Cost | 3,664 | ||||||||
| Investment Owned, at Fair Value | $ 2,977 | ||||||||
| Investment, Interest Rate, Paid in Kind | 13.36% | 13.36% | 13.36% | 13.36% | |||||
| Investment, Identifier [Axis]: Playmonster Group LLC Priority First Lien Secured Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PlaymonsterGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:PriorityFirstLienSecuredLoanMember | whf:PriorityFirstLienSecuredLoanMember | whf:PriorityFirstLienSecuredLoanMember | whf:PriorityFirstLienSecuredLoanMember | |||||
| Investment Owned, at Fair Value | $ 176 | ||||||||
| Investment, Identifier [Axis]: Playmonster Group LLC, Priority First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PlaymonsterGroupLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:PriorityFirstLienSecuredLoanMember | whf:PriorityFirstLienSecuredLoanMember | whf:PriorityFirstLienSecuredLoanMember | whf:PriorityFirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment, Acquisition Date | Dec. 09, 2022 | ||||||||
| Investment Maturity Date | Jun. 08, 2026 | Jun. 08, 2026 | Jun. 08, 2026 | Jun. 08, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 184 | ||||||||
| Investment Owned, at Cost | 176 | ||||||||
| Investment Owned, at Fair Value | $ 176 | ||||||||
| Investment, Interest Rate, Paid in Kind | 11.47% | 11.47% | 11.47% | 11.47% | |||||
| Investment, Identifier [Axis]: Potpourri Group, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PotpourriGroupIncMember | whf:PotpourriGroupIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50% | |
| Investment, Basis Spread, Variable Rate | 8.25% | 8.25% | 8.25% | 8.25% | 8.25% | 8.25% | 8.25% | 8.25% | |
| Investment Interest Rate | 12.47% | 9.75% | 12.47% | 12.47% | 12.47% | 9.75% | 9.75% | 9.75% | |
| Investment, Acquisition Date | Jul. 03, 2019 | Jul. 03, 2019 | |||||||
| Investment Maturity Date | Jul. 03, 2024 | Jul. 03, 2024 | Jul. 03, 2024 | Jul. 03, 2024 | Jul. 03, 2024 | Jul. 03, 2024 | Jul. 03, 2024 | Jul. 03, 2024 | |
| Investment Owned, Balance, Principal Amount | $ 14,187 | $ 17,148 | |||||||
| Investment Owned, at Cost | 14,091 | 16,955 | |||||||
| Investment Owned, at Fair Value | $ 14,187 | $ 17,148 | |||||||
| Investment, Identifier [Axis]: Poultry Holdings LLC (HPP), First Lien Secured Term Loan, Floor 1.00%, Spread L plus 7.25%, Rate 8.25% (6.75% Cash + 1.50% PIK), Due 6/28/225 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PoultryHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Investment Interest Rate | 8.25% | 8.25% | 8.25% | 8.25% | |||||
| Investment, Acquisition Date | Oct. 21, 2019 | ||||||||
| Investment Maturity Date | Jun. 28, 2025 | Jun. 28, 2025 | Jun. 28, 2025 | Jun. 28, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 7,770 | ||||||||
| Investment Owned, at Cost | 7,676 | ||||||||
| Investment Owned, at Fair Value | $ 6,993 | ||||||||
| Investment, Interest Rate, Paid in Kind | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Investment, Interest Rate, Paid in Cash | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Fair Value As A Percentage of Member's Equity | 26.88% | ||||||||
| Investment, Identifier [Axis]: Poultry Holdings LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 7.25%, Rate 11.67% (10.17% Cash + 1.50% PIK), Due 6/28/25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:PoultryHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Investment Interest Rate | 11.67% | 11.67% | 11.67% | 11.67% | |||||
| Investment, Acquisition Date | Oct. 21, 2019 | ||||||||
| Investment Maturity Date | Jun. 28, 2025 | Jun. 28, 2025 | Jun. 28, 2025 | Jun. 28, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 7,162 | ||||||||
| Investment Owned, at Cost | 7,101 | ||||||||
| Investment Owned, at Fair Value | $ 7,011 | ||||||||
| Investment, Interest Rate, Paid in Kind | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Investment, Interest Rate, Paid in Cash | 10.17% | 10.17% | 10.17% | 10.17% | |||||
| Fair Value As A Percentage of Member's Equity | 23.19% | ||||||||
| Investment, Identifier [Axis]: Project Castle, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:ProjectCastleIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Industrial Machinery | Industrial Machinery | Industrial Machinery | Industrial Machinery | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Investment, Basis Spread, Variable Rate | 5.50% | 5.50% | 5.50% | 5.50% | |||||
| Investment Interest Rate | 10.08% | 10.08% | 10.08% | 10.08% | |||||
| Investment, Acquisition Date | Jun. 09, 2022 | ||||||||
| Investment Maturity Date | Jun. 01, 2029 | Jun. 01, 2029 | Jun. 01, 2029 | Jun. 01, 2029 | |||||
| Investment Owned, Balance, Principal Amount | $ 8,355 | ||||||||
| Investment Owned, at Cost | 7,535 | ||||||||
| Investment Owned, at Fair Value | $ 7,269 | ||||||||
| Investment, Identifier [Axis]: Quest Events, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:QuestEventsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 10.73% | 10.73% | 10.73% | 10.73% | |||||
| Investment, Acquisition Date | Jul. 19, 2019 | ||||||||
| Investment Maturity Date | Dec. 28, 2024 | Dec. 28, 2024 | Dec. 28, 2024 | Dec. 28, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 468 | ||||||||
| Investment Owned, at Cost | 464 | ||||||||
| Investment Owned, at Fair Value | $ 431 | ||||||||
| Fair Value As A Percentage of Member's Equity | 1.43% | ||||||||
| Investment, Identifier [Axis]: Quest Events, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:QuestEventsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 10.73% | 10.73% | 10.73% | 10.73% | |||||
| Investment, Acquisition Date | Jul. 19, 2019 | ||||||||
| Investment Maturity Date | Dec. 28, 2024 | Dec. 28, 2024 | Dec. 28, 2024 | Dec. 28, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 11,805 | ||||||||
| Investment Owned, at Cost | 11,728 | ||||||||
| Investment Owned, at Fair Value | $ 11,298 | ||||||||
| Fair Value As A Percentage of Member's Equity | 37.36% | ||||||||
| Investment, Identifier [Axis]: Quest Events, LLC Preferred Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:QuestEventsLLCMember | whf:QuestEventsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | us-gaap:PreferredStockMember | whf:PreferredUnitsMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |
| Investment, Acquisition Date | Dec. 28, 2018 | Dec. 28, 2018 | |||||||
| Investment Maturity Date | Dec. 08, 2025 | Dec. 08, 2025 | Dec. 08, 2025 | Dec. 08, 2025 | Dec. 08, 2025 | Dec. 08, 2025 | Dec. 08, 2025 | Dec. 08, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 347 | $ 317 | |||||||
| Investment Owned, at Cost | 347 | $ 317 | |||||||
| Investment Owned, at Fair Value | $ 110 | ||||||||
| Investment, Identifier [Axis]: Quest Events, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/28/2024 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:QuestEventsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Jul. 19, 2019 | ||||||||
| Investment Maturity Date | Dec. 28, 2024 | Dec. 28, 2024 | Dec. 28, 2024 | Dec. 28, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 935 | ||||||||
| Investment Owned, at Cost | 925 | ||||||||
| Investment Owned, at Fair Value | $ 760 | ||||||||
| Fair Value As A Percentage of Member's Equity | 2.92% | ||||||||
| Investment, Identifier [Axis]: Quest Events, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/28/2024 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:QuestEventsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Diversified Support Services | Diversified Support Services | Diversified Support Services | Diversified Support Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Jul. 19, 2019 | ||||||||
| Investment Maturity Date | Dec. 28, 2024 | Dec. 28, 2024 | Dec. 28, 2024 | Dec. 28, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 11,966 | ||||||||
| Investment Owned, at Cost | 11,848 | ||||||||
| Investment Owned, at Fair Value | $ 9,729 | ||||||||
| Fair Value As A Percentage of Member's Equity | 37.40% | ||||||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC , First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.25%, Rate 7.25%, Due 12/31/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RCKCAcquisitionsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Investment, Acquisition Date | Jan. 27, 2021 | ||||||||
| Investment Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Investment Owned, at Fair Value | $ (5) | ||||||||
| Fair Value As A Percentage of Member's Equity | (0.02%) | ||||||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC , First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.25%, Rate 7.25%, Due 12/31/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RCKCAcquisitionsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Investment, Acquisition Date | Jan. 27, 2021 | ||||||||
| Investment Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 818 | ||||||||
| Investment Owned, at Cost | 804 | ||||||||
| Investment Owned, at Fair Value | $ 814 | ||||||||
| Fair Value As A Percentage of Member's Equity | 3.13% | ||||||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC , First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 7.25%, Due 12/312026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RCKCAcquisitionsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Investment, Acquisition Date | Jan. 27, 2021 | ||||||||
| Investment Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 11,264 | ||||||||
| Investment Owned, at Cost | 11,074 | ||||||||
| Investment Owned, at Fair Value | $ 11,151 | ||||||||
| Fair Value As A Percentage of Member's Equity | 42.87% | ||||||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.25%, Rate 10.64%, Due 12/31/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RCKCAcquisitionsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 10.65% | 10.65% | 10.65% | 10.65% | |||||
| Investment, Acquisition Date | Jan. 27, 2021 | ||||||||
| Investment Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 3,007 | ||||||||
| Investment Owned, at Cost | 2,963 | ||||||||
| Investment Owned, at Fair Value | $ 2,947 | ||||||||
| Fair Value As A Percentage of Member's Equity | 9.75% | ||||||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.25%, Rate 10.57%, Due 12/31/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RCKCAcquisitionsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 10.60% | 10.60% | 10.60% | 10.60% | |||||
| Investment, Acquisition Date | Jan. 27, 2021 | ||||||||
| Investment Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 533 | ||||||||
| Investment Owned, at Cost | 526 | ||||||||
| Investment Owned, at Fair Value | $ 517 | ||||||||
| Fair Value As A Percentage of Member's Equity | 1.71% | ||||||||
| Investment, Identifier [Axis]: RCKC Acquisitions LLC., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 10.98%, Due 12/31/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RCKCAcquisitionsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 10.98% | 10.98% | 10.98% | 10.98% | |||||
| Investment, Acquisition Date | Jan. 27, 2021 | ||||||||
| Investment Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 11,150 | ||||||||
| Investment Owned, at Cost | 11,000 | ||||||||
| Investment Owned, at Fair Value | $ 10,929 | ||||||||
| Fair Value As A Percentage of Member's Equity | 36.14% | ||||||||
| Investment, Identifier [Axis]: RLJ Pro-Vac, Inc. First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RLJPro-VacInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Investment, Acquisition Date | Dec. 31, 2021 | ||||||||
| Investment Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 8,775 | ||||||||
| Investment Owned, at Cost | 8,600 | ||||||||
| Investment Owned, at Fair Value | $ 8,600 | ||||||||
| Investment, Identifier [Axis]: RLJ Pro-Vac, Inc. First Lien Secured Term Loan First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RLJPro-VacInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 7.25% | 7.25% | 7.25% | 7.25% | |||||
| Investment, Acquisition Date | Dec. 31, 2021 | ||||||||
| Investment Maturity Date | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | Dec. 31, 2026 | |||||
| Investment, Identifier [Axis]: Road Safety Services, First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RoadSafetyServicesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | Dec. 30, 2021 | ||||||||
| Investment Maturity Date | Mar. 18, 2025 | Mar. 18, 2025 | Mar. 18, 2025 | Mar. 18, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 4,099 | ||||||||
| Investment Owned, at Cost | 4,017 | ||||||||
| Investment Owned, at Fair Value | $ 4,017 | ||||||||
| Investment, Identifier [Axis]: Road Safety Services, Inc. First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RoadSafetyServicesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.92% | 10.92% | 10.92% | 10.92% | |||||
| Investment, Acquisition Date | Dec. 31, 2019 | ||||||||
| Investment Maturity Date | Mar. 18, 2025 | Mar. 18, 2025 | Mar. 18, 2025 | Mar. 18, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 8,603 | ||||||||
| Investment Owned, at Cost | 8,522 | ||||||||
| Investment Owned, at Fair Value | $ 8,432 | ||||||||
| Fair Value As A Percentage of Member's Equity | 27.88% | ||||||||
| Investment, Identifier [Axis]: Road Safety Services, Inc., First Lien Secured Revolving Loan, Floor 3.25%, Spread P plus 5.50%, Rate 8.75%, Due 9/18/2023 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RoadSafetyServicesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | |||||
| Investment, Interest Rate, Floor | 3.25% | 3.25% | 3.25% | 3.25% | |||||
| Investment, Basis Spread, Variable Rate | 5.50% | 5.50% | 5.50% | 5.50% | |||||
| Investment Interest Rate | 8.75% | 8.75% | 8.75% | 8.75% | |||||
| Investment, Acquisition Date | Dec. 31, 2019 | ||||||||
| Investment Maturity Date | Sep. 18, 2023 | Sep. 18, 2023 | Sep. 18, 2023 | Sep. 18, 2023 | |||||
| Investment Owned, Balance, Principal Amount | $ 496 | ||||||||
| Investment Owned, at Cost | 489 | ||||||||
| Investment Owned, at Fair Value | $ 501 | ||||||||
| Fair Value As A Percentage of Member's Equity | 1.93% | ||||||||
| Investment, Identifier [Axis]: Road Safety Services, Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 3/18/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:RoadSafetyServicesIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | Dec. 31, 2019 | ||||||||
| Investment Maturity Date | Mar. 18, 2025 | Mar. 18, 2025 | Mar. 18, 2025 | Mar. 18, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 6,427 | ||||||||
| Investment Owned, at Cost | 6,340 | ||||||||
| Investment Owned, at Fair Value | $ 6,405 | ||||||||
| Fair Value As A Percentage of Member's Equity | 24.62% | ||||||||
| Investment, Identifier [Axis]: Ross-Simons Topco, LP Preferred Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:Ross-SimonsTopcoLPMember | whf:Ross-SimonsTopcoLPMember | |||||||
| Investment, Type [Extensible Enumeration] | us-gaap:PreferredStockMember | whf:PreferredUnitsMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | whf:PreferredUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | Internet & Direct Marketing Retail | |
| Investment, Basis Spread, Variable Rate | 8% | 8% | 8% | 8% | 8% | 8% | 8% | 8% | |
| Investment, Acquisition Date | Dec. 04, 2020 | Dec. 04, 2020 | |||||||
| Investment Owned, Balance, Principal Amount | $ 600 | $ 600 | |||||||
| Investment Owned, at Cost | 514 | 600 | |||||||
| Investment Owned, at Fair Value | $ 714 | $ 786 | |||||||
| Investment, Interest Rate, Paid in Kind | 8% | 8% | 8% | 8% | 8% | 8% | 8% | 8% | |
| Investment, Identifier [Axis]: SFS Global Holding Company Warrants | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SFSGlobalHoldingCompanyMember | whf:SnapFitnessHoldingsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Other Diversified Financial Services [Member] | Other Diversified Financial Services [Member] | Other Diversified Financial Services [Member] | Other Diversified Financial Services [Member] | Other Diversified Financial Services [Member] | Other Diversified Financial Services [Member] | Other Diversified Financial Services [Member] | Other Diversified Financial Services [Member] | |
| Investment, Acquisition Date | Jun. 28, 2018 | Jun. 28, 2018 | |||||||
| Investment Maturity Date | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | |
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC Common Stock | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SalonRepublicHoldingsLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | Common Stock [Member] | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | |||||
| Investment, Acquisition Date | Dec. 02, 2022 | ||||||||
| Investment Owned, Balance, Principal Amount | $ 400 | ||||||||
| Investment Owned, at Cost | 400 | ||||||||
| Investment Owned, at Fair Value | $ 400 | ||||||||
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SalonRepublicHoldingsLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7% | 7% | 7% | 7% | |||||
| Investment Interest Rate | 11.42% | 11.42% | 11.42% | 11.42% | |||||
| Investment, Acquisition Date | Dec. 02, 2022 | ||||||||
| Investment Maturity Date | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 56 | ||||||||
| Investment Owned, at Cost | 55 | ||||||||
| Investment Owned, at Fair Value | $ 55 | ||||||||
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SalonRepublicHoldingsLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7% | 7% | 7% | 7% | |||||
| Investment Interest Rate | 11.42% | 11.42% | 11.42% | 11.42% | |||||
| Investment, Acquisition Date | Dec. 02, 2022 | ||||||||
| Investment Maturity Date | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 258 | ||||||||
| Investment Owned, at Cost | 251 | ||||||||
| Investment Owned, at Fair Value | $ 251 | ||||||||
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SalonRepublicHoldingsLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | Real Estate Operating Companies | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment Interest Rate | 11.73% | 11.73% | 11.73% | 11.73% | |||||
| Investment, Acquisition Date | Dec. 02, 2022 | ||||||||
| Investment Maturity Date | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | Dec. 02, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 5,155 | ||||||||
| Investment Owned, at Cost | 5,003 | ||||||||
| Investment Owned, at Fair Value | $ 5,003 | ||||||||
| Investment, Identifier [Axis]: Salon Republic Holdings, LLC, Preferred Stock | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SalonRepublicHoldingsLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | us-gaap:PreferredStockMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | us-gaap:RealEstateSectorMember | |||||
| Investment, Acquisition Date | Dec. 02, 2022 | ||||||||
| Investment Owned, Balance, Principal Amount | $ 200 | ||||||||
| Investment Owned, at Cost | 200 | ||||||||
| Investment Owned, at Fair Value | $ 200 | ||||||||
| Investment, Interest Rate, Paid in Kind | 8% | 8% | 8% | 8% | |||||
| Investment, Identifier [Axis]: Sigue Corporation Warrants | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SigueCorporationMember | whf:SigueCorporationMember | |||||||
| Investment, Type [Extensible Enumeration] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Other Diversified Financial Services [Member] | Other Diversified Financial Services [Member] | Other Diversified Financial Services [Member] | Other Diversified Financial Services [Member] | Other Diversified Financial Services [Member] | Other Diversified Financial Services [Member] | Other Diversified Financial Services [Member] | Other Diversified Financial Services [Member] | |
| Investment, Acquisition Date | Jun. 28, 2018 | Jun. 28, 2018 | |||||||
| Investment Maturity Date | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | Dec. 28, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 22 | $ 22 | |||||||
| Investment Owned, at Cost | 2,890 | 2,890 | |||||||
| Investment Owned, at Fair Value | $ 3,788 | $ 3,492 | |||||||
| Investment, Identifier [Axis]: Sklar Holdings, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SklarHoldingsIncMember | whf:SklarHoldingsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | Diversified Chemicals [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:PrimeRateMember | London Interbank Offered Rate (LIBOR) [Member] | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 8.75% | 7.75% | 8.75% | 8.75% | 8.75% | 7.75% | 7.75% | 7.75% | |
| Investment Interest Rate | 16.25% | 8.75% | 16.25% | 16.25% | 16.25% | 8.75% | 8.75% | 8.75% | |
| Investment, Acquisition Date | Nov. 13, 2019 | Nov. 13, 2019 | |||||||
| Investment Maturity Date | May 13, 2023 | May 13, 2023 | May 13, 2023 | May 13, 2023 | May 13, 2023 | May 13, 2023 | May 13, 2023 | May 13, 2023 | |
| Investment Owned, Balance, Principal Amount | $ 7,353 | $ 7,389 | |||||||
| Investment Owned, at Cost | 7,302 | 7,295 | |||||||
| Investment Owned, at Fair Value | $ 6,537 | $ 7,020 | |||||||
| Investment, Interest Rate, Paid in Kind | 2% | 2% | 2% | 2% | |||||
| Investment, Interest Rate, Paid in Cash | 14.25% | 14.25% | 14.25% | 14.25% | |||||
| Investment, Identifier [Axis]: Sleep OpCo LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SleepOpCoLLCMember | whf:SleepOpCoLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.50% | 9.75% | 6.50% | 6.50% | 6.50% | 9.75% | 9.75% | 9.75% | |
| Investment Interest Rate | 10.40% | 7.50% | 10.40% | 10.40% | 10.40% | 7.50% | 7.50% | 7.50% | |
| Investment, Acquisition Date | Oct. 12, 2021 | Oct. 12, 2021 | |||||||
| Investment Maturity Date | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | |
| Investment Owned, at Fair Value | $ (39) | ||||||||
| Investment, Identifier [Axis]: Sleep OpCo LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SleepOpCoLLCMember | whf:SleepOpCoLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Investment Interest Rate | 10.40% | 7.50% | 10.40% | 10.40% | 10.40% | 7.50% | 7.50% | 7.50% | |
| Investment, Acquisition Date | Oct. 12, 2021 | Oct. 12, 2021 | |||||||
| Investment Maturity Date | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | Oct. 12, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 20,834 | $ 20,034 | |||||||
| Investment Owned, at Cost | 20,517 | 19,651 | |||||||
| Investment Owned, at Fair Value | $ 20,210 | $ 19,645 | |||||||
| Investment, Identifier [Axis]: Smalto Inc., First Lien Secured Term Loan, Floor 1.00%, Spread E plus 6.25%, Rate 9.00%, Due 4/28/28 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SmaltoInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Household Appliances | Household Appliances | Household Appliances | Household Appliances | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whf:EuroInterbankOfferedRateMember | whf:EuroInterbankOfferedRateMember | whf:EuroInterbankOfferedRateMember | whf:EuroInterbankOfferedRateMember | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.25% | 6.25% | 6.25% | 6.25% | |||||
| Investment Interest Rate | 9% | 9% | 9% | 9% | |||||
| Investment, Acquisition Date | May 04, 2022 | ||||||||
| Investment Maturity Date | Apr. 28, 2028 | Apr. 28, 2028 | Apr. 28, 2028 | Apr. 28, 2028 | |||||
| Investment Owned, Balance, Principal Amount | € | € 6,642 | ||||||||
| Investment Owned, at Cost | $ 6,865 | ||||||||
| Investment Owned, at Fair Value | $ 6,899 | ||||||||
| Fair Value As A Percentage of Member's Equity | 22.81% | ||||||||
| Investment, Identifier [Axis]: Smalto Inc., First Lien Secured Term Loan, Floor 1.00%, Spread SF plus 6.00%, Rate 11.04%, Due 4/28/28 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SmaltoInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Household Appliances | Household Appliances | Household Appliances | Household Appliances | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 11.04% | 11.04% | 11.04% | 11.04% | |||||
| Investment, Acquisition Date | May 04, 2022 | ||||||||
| Investment Maturity Date | Apr. 28, 2028 | Apr. 28, 2028 | Apr. 28, 2028 | Apr. 28, 2028 | |||||
| Investment Owned, Balance, Principal Amount | $ 1,012 | ||||||||
| Investment Owned, at Cost | 994 | ||||||||
| Investment Owned, at Fair Value | $ 986 | ||||||||
| Fair Value As A Percentage of Member's Equity | 3.26% | ||||||||
| Investment, Identifier [Axis]: Snap Fitness Holdings, Inc Class A Common Stock | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SnapFitnessHoldingsIncMember | whf:SnapFitnessHoldingsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | us-gaap:CommonClassAMember | us-gaap:CommonClassAMember | us-gaap:CommonClassAMember | us-gaap:CommonClassAMember | us-gaap:CommonClassAMember | us-gaap:CommonClassAMember | us-gaap:CommonClassAMember | us-gaap:CommonClassAMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | |
| Investment, Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | |||||||
| Investment Owned, Balance, Principal Amount | $ 2 | $ 2 | |||||||
| Investment Owned, at Cost | 1,941 | 1,941 | |||||||
| Investment Owned, at Fair Value | $ 131 | $ 188 | |||||||
| Investment, Identifier [Axis]: Snap Fitness Holdings, Inc First Lien Secured Term Loan C | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SnapFitnessHoldingsIncMember | whf:SnapFitnessHoldingsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | whf:FirstLienSecuredTermLoanCMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | |
| Investment, Basis Spread, Variable Rate | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | |
| Investment Interest Rate | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | |
| Investment, Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | |||||||
| Investment Owned, Balance, Principal Amount | $ 1,268 | $ 1,268 | |||||||
| Investment Owned, at Cost | 1,265 | 1,265 | |||||||
| Investment Owned, at Fair Value | $ 1,198 | $ 1,219 | |||||||
| Investment, Interest Rate, Paid in Kind | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | 9.50% | |
| Investment, Interest Rate, Paid in Cash | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | |
| Investment, Identifier [Axis]: Snap Fitness Holdings, Inc Warrants | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SnapFitnessHoldingsIncMember | whf:SnapFitnessHoldingsIncMember | |||||||
| Investment, Type [Extensible Enumeration] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | Warrant [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | Leisure Facilities [Member] | |
| Investment, Acquisition Date | Jun. 29, 2020 | Jun. 29, 2020 | |||||||
| Investment Maturity Date | Jun. 28, 2028 | Jun. 28, 2028 | Jun. 28, 2028 | Jun. 28, 2028 | Jun. 28, 2028 | Jun. 28, 2028 | Jun. 28, 2028 | Jun. 28, 2028 | |
| Investment Owned, Balance, Principal Amount | $ 1 | $ 1 | |||||||
| Investment Owned, at Cost | 793 | 793 | |||||||
| Investment Owned, at Fair Value | $ 53 | $ 76 | |||||||
| Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate 8.94 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | Solar Holdings Bidco Limited | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment Interest Rate | 11.05% | 11.05% | 11.05% | 11.05% | |||||
| Investment, Acquisition Date | Sep. 30, 2022 | ||||||||
| Investment Maturity Date | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | |||||
| Investment Owned, at Fair Value | $ (62) | ||||||||
| Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate 9.74 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | Solar Holdings Bidco Limited | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment Interest Rate | 11.05% | 11.05% | 11.05% | 11.05% | |||||
| Investment, Acquisition Date | Sep. 30, 2022 | ||||||||
| Investment Maturity Date | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | |||||
| Investment Owned, Balance, Principal Amount | $ 53 | ||||||||
| Investment Owned, at Cost | 51 | ||||||||
| Investment Owned, at Fair Value | $ 52 | ||||||||
| Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Term Loan CDOR | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | Solar Holdings Bidco Limited | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | |||||
| Investment, Interest Rate, Floor | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment Interest Rate | 11.61% | 11.61% | 11.61% | 11.61% | |||||
| Investment, Acquisition Date | Sep. 30, 2022 | ||||||||
| Investment Maturity Date | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | |||||
| Investment Owned, Balance, Principal Amount | $ 3,837 | ||||||||
| Investment Owned, at Cost | 2,729 | ||||||||
| Investment Owned, at Fair Value | $ 2,749 | ||||||||
| Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Term Loan SF | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | Solar Holdings Bidco Limited | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment Interest Rate | 11.05% | 11.05% | 11.05% | 11.05% | |||||
| Investment, Acquisition Date | Sep. 30, 2022 | ||||||||
| Investment Maturity Date | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | |||||
| Investment Owned, Balance, Principal Amount | $ 2,783 | ||||||||
| Investment Owned, at Cost | 2,709 | ||||||||
| Investment Owned, at Fair Value | $ 2,713 | ||||||||
| Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Term Loan SONIA | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | Solar Holdings Bidco Limited | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | whf:SterlingOvernightIndexAverageMember | whf:SterlingOvernightIndexAverageMember | whf:SterlingOvernightIndexAverageMember | whf:SterlingOvernightIndexAverageMember | |||||
| Investment, Interest Rate, Floor | 0% | 0% | 0% | 0% | |||||
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment Interest Rate | 10.18% | 10.18% | 10.18% | 10.18% | |||||
| Investment, Acquisition Date | Sep. 30, 2022 | ||||||||
| Investment Maturity Date | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | Sep. 28, 2029 | |||||
| Investment Owned, Balance, Principal Amount | $ 168 | ||||||||
| Investment Owned, at Cost | 182 | ||||||||
| Investment Owned, at Fair Value | $ 199 | ||||||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC , First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 7/30/2027 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SourceCodeHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | Aug. 10, 2021 | ||||||||
| Investment Maturity Date | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | |||||
| Investment Owned, at Fair Value | $ 1 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0% | ||||||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC , First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 7/30/2027 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SourceCodeHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | Aug. 10, 2021 | ||||||||
| Investment Maturity Date | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 7,629 | ||||||||
| Investment Owned, at Cost | 7,487 | ||||||||
| Investment Owned, at Fair Value | $ 7,489 | ||||||||
| Fair Value As A Percentage of Member's Equity | 28.79% | ||||||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SourceCodeHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | Jul. 30, 2021 | ||||||||
| Investment Maturity Date | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | |||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SourceCodeHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | Jul. 30, 2021 | ||||||||
| Investment Maturity Date | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 7,629 | ||||||||
| Investment Owned, at Cost | 7,487 | ||||||||
| Investment Owned, at Fair Value | $ 7,489 | ||||||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus, 6.50%, Rate 10.92%, Due 7/30/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:E-PhoenixAcquisitionCo.Inc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.92% | 10.92% | 10.92% | 10.92% | |||||
| Investment, Acquisition Date | Aug. 10, 2021 | ||||||||
| Investment Maturity Date | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | |||||
| Investment Owned, at Fair Value | $ 2 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.01% | ||||||||
| Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus, 6.50%, Rate 10.92%, Due 7/30/27 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:E-PhoenixAcquisitionCo.Inc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.92% | 10.92% | 10.92% | 10.92% | |||||
| Investment, Acquisition Date | Aug. 10, 2021 | ||||||||
| Investment Maturity Date | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | Jul. 30, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 15,105 | ||||||||
| Investment Owned, at Cost | 14,874 | ||||||||
| Investment Owned, at Fair Value | $ 14,882 | ||||||||
| Fair Value As A Percentage of Member's Equity | 49.21% | ||||||||
| Investment, Identifier [Axis]: Stella & Chewy's LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus 8.75%, Rate 13.17% (11.17% Cash + 2.00% PIK), Due 12/16/25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:StellaandChewysLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 8.75% | 8.75% | 8.75% | 8.75% | |||||
| Investment Interest Rate | 13.17% | 13.17% | 13.17% | 13.17% | |||||
| Investment, Acquisition Date | Mar. 26, 2021 | ||||||||
| Investment Maturity Date | Dec. 16, 2025 | Dec. 16, 2025 | Dec. 16, 2025 | Dec. 16, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 1,375 | ||||||||
| Investment Owned, at Cost | 1,362 | ||||||||
| Investment Owned, at Fair Value | $ 1,320 | ||||||||
| Investment, Interest Rate, Paid in Kind | 2% | 2% | 2% | 2% | |||||
| Investment, Interest Rate, Paid in Cash | 11.17% | 11.17% | 11.17% | 11.17% | |||||
| Fair Value As A Percentage of Member's Equity | 4.37% | ||||||||
| Investment, Identifier [Axis]: Stella & Chewy's LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 8.75%, Rate 13.40% (11.40% Cash + 2.00% PIK), Due 12/16/25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:StellaandChewysLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 8.75% | 8.75% | 8.75% | 8.75% | |||||
| Investment Interest Rate | 13.40% | 13.40% | 13.40% | 13.40% | |||||
| Investment, Acquisition Date | Dec. 29, 2020 | ||||||||
| Investment Maturity Date | Dec. 16, 2025 | Dec. 16, 2025 | Dec. 16, 2025 | Dec. 16, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 3,893 | ||||||||
| Investment Owned, at Cost | 3,849 | ||||||||
| Investment Owned, at Fair Value | $ 3,738 | ||||||||
| Investment, Interest Rate, Paid in Kind | 2% | 2% | 2% | 2% | |||||
| Investment, Interest Rate, Paid in Cash | 11.40% | 11.40% | 11.40% | 11.40% | |||||
| Fair Value As A Percentage of Member's Equity | 12.36% | ||||||||
| Investment, Identifier [Axis]: Stella and Chewy's LLC, First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.75%, Rate 7.75%, Due 12/16/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:StellaandChewysLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Investment, Acquisition Date | Dec. 29, 2020 | ||||||||
| Investment Maturity Date | Dec. 16, 2025 | Dec. 16, 2025 | Dec. 16, 2025 | Dec. 16, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 1,893 | ||||||||
| Investment Owned, at Cost | 1,877 | ||||||||
| Investment Owned, at Fair Value | $ 1,697 | ||||||||
| Fair Value As A Percentage of Member's Equity | 6.52% | ||||||||
| Investment, Identifier [Axis]: Stella and Chewy's LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.75%, Rate 7.75%, Due 12/16/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:StellaandChewysLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Investment, Acquisition Date | Dec. 29, 2020 | ||||||||
| Investment Maturity Date | Dec. 16, 2025 | Dec. 16, 2025 | Dec. 16, 2025 | Dec. 16, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 5,313 | ||||||||
| Investment Owned, at Cost | 5,228 | ||||||||
| Investment Owned, at Fair Value | $ 4,967 | ||||||||
| Fair Value As A Percentage of Member's Equity | 19.10% | ||||||||
| Investment, Identifier [Axis]: StoicLane MidCo, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:StoiclaneMidcoLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Development [Member] | Real Estate Development [Member] | Real Estate Development [Member] | Real Estate Development [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment Interest Rate | 12.20% | 12.20% | 12.20% | 12.20% | |||||
| Investment, Acquisition Date | Nov. 04, 2022 | ||||||||
| Investment Maturity Date | Nov. 04, 2027 | Nov. 04, 2027 | Nov. 04, 2027 | Nov. 04, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 3,621 | ||||||||
| Investment Owned, at Cost | 3,563 | ||||||||
| Investment Owned, at Fair Value | $ 3,563 | ||||||||
| Investment, Identifier [Axis]: StoicLane MidCo, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:StoiclaneMidcoLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Real Estate Development [Member] | Real Estate Development [Member] | Real Estate Development [Member] | Real Estate Development [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment Interest Rate | 11.82% | 11.82% | 11.82% | 11.82% | |||||
| Investment, Acquisition Date | Nov. 04, 2022 | ||||||||
| Investment Maturity Date | Nov. 04, 2027 | Nov. 04, 2027 | Nov. 04, 2027 | Nov. 04, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 4,653 | ||||||||
| Investment Owned, at Cost | 4,540 | ||||||||
| Investment Owned, at Fair Value | $ 4,540 | ||||||||
| Investment, Identifier [Axis]: Sunless, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SunlessInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Personal Products | Personal Products | Personal Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Investment, Acquisition Date | Jun. 30, 2022 | ||||||||
| Investment Maturity Date | Aug. 13, 2025 | Aug. 13, 2025 | Aug. 13, 2025 | Aug. 13, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 2,086 | ||||||||
| Investment Owned, at Cost | 2,051 | ||||||||
| Investment Owned, at Fair Value | $ 2,071 | ||||||||
| Investment, Identifier [Axis]: Sunless, Inc., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 8/13/2024 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SunlessIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Personal Products | Personal Products | Personal Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Oct. 21, 2019 | ||||||||
| Investment Maturity Date | Aug. 13, 2024 | Aug. 13, 2024 | Aug. 13, 2024 | Aug. 13, 2024 | |||||
| Investment Owned, at Fair Value | $ 14 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.05% | ||||||||
| Investment, Identifier [Axis]: Sunless, Inc., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.24%, Due 8/13/25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MaxSolutionsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Personal Products | Personal Products | Personal Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 11.24% | 11.24% | 11.24% | 11.24% | |||||
| Investment, Acquisition Date | Oct. 21, 2019 | ||||||||
| Investment Maturity Date | Aug. 13, 2025 | Aug. 13, 2025 | Aug. 13, 2025 | Aug. 13, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 266 | ||||||||
| Investment Owned, at Cost | 264 | ||||||||
| Investment Owned, at Fair Value | $ 270 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.89% | ||||||||
| Investment, Identifier [Axis]: Sunless, Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 8/13/2024 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SunlessIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Personal Products | Personal Products | Personal Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Oct. 21, 2019 | ||||||||
| Investment Maturity Date | Aug. 13, 2024 | Aug. 13, 2024 | Aug. 13, 2024 | Aug. 13, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 4,259 | ||||||||
| Investment Owned, at Cost | 4,185 | ||||||||
| Investment Owned, at Fair Value | $ 4,259 | ||||||||
| Fair Value As A Percentage of Member's Equity | 16.38% | ||||||||
| Investment, Identifier [Axis]: Sunless, Inc.., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.23%, Due 8/13/25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:MaxSolutionsIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Personal Products | Personal Products | Personal Products | Personal Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 11.23% | 11.23% | 11.23% | 11.23% | |||||
| Investment, Acquisition Date | Oct. 21, 2019 | ||||||||
| Investment Maturity Date | Aug. 13, 2025 | Aug. 13, 2025 | Aug. 13, 2025 | Aug. 13, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 3,679 | ||||||||
| Investment Owned, at Cost | 3,631 | ||||||||
| Investment Owned, at Fair Value | $ 3,679 | ||||||||
| Fair Value As A Percentage of Member's Equity | 12.18% | ||||||||
| Investment, Identifier [Axis]: Sure Fit Home Products, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:SureFitHomeProductsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | Home Furnishings [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment Interest Rate | 10.75% | 10.75% | 10.75% | 10.75% | |||||
| Investment, Acquisition Date | Apr. 12, 2021 | ||||||||
| Investment Maturity Date | Jul. 13, 2023 | Jul. 13, 2023 | Jul. 13, 2023 | Jul. 13, 2023 | |||||
| Investment Owned, Balance, Principal Amount | $ 4,912 | ||||||||
| Investment Owned, at Cost | 4,828 | ||||||||
| Investment Owned, at Fair Value | $ 4,372 | ||||||||
| Investment, Identifier [Axis]: TOUR Intermediate Holdings, LLC, First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 5/15/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TOURIntermediateHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | May 19, 2020 | ||||||||
| Investment Maturity Date | May 15, 2025 | May 15, 2025 | May 15, 2025 | May 15, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 2,616 | ||||||||
| Investment Owned, at Cost | 2,600 | ||||||||
| Investment Owned, at Fair Value | $ 2,616 | ||||||||
| Fair Value As A Percentage of Member's Equity | 10.06% | ||||||||
| Investment, Identifier [Axis]: TOUR Intermediate Holdings, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 7.50%, Due 5/15/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TOURIntermediateHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | May 19, 2020 | ||||||||
| Investment Maturity Date | May 15, 2025 | May 15, 2025 | May 15, 2025 | May 15, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 7,438 | ||||||||
| Investment Owned, at Cost | 7,343 | ||||||||
| Investment Owned, at Fair Value | $ 7,438 | ||||||||
| Fair Value As A Percentage of Member's Equity | 28.59% | ||||||||
| Investment, Identifier [Axis]: TOUR Intermediate Holdings., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.50%, Rate 10.88%, Due 5/15/25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TOURIntermediateHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.88% | 10.88% | 10.88% | 10.88% | |||||
| Investment, Acquisition Date | May 19, 2020 | ||||||||
| Investment Maturity Date | May 15, 2025 | May 15, 2025 | May 15, 2025 | May 15, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 2,468 | ||||||||
| Investment Owned, at Cost | 2,458 | ||||||||
| Investment Owned, at Fair Value | $ 2,468 | ||||||||
| Fair Value As A Percentage of Member's Equity | 8.16% | ||||||||
| Investment, Identifier [Axis]: TOUR Intermediate Holdings., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 10.88%, Due 5/15/25 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TOURIntermediateHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | Investment Banking & Brokerage | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 10.88% | 10.88% | 10.88% | 10.88% | |||||
| Investment, Acquisition Date | May 19, 2020 | ||||||||
| Investment Maturity Date | May 15, 2025 | May 15, 2025 | May 15, 2025 | May 15, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 3,077 | ||||||||
| Investment Owned, at Cost | 3,049 | ||||||||
| Investment Owned, at Fair Value | $ 3,077 | ||||||||
| Fair Value As A Percentage of Member's Equity | 10.18% | ||||||||
| Investment, Identifier [Axis]: Team Car Care Holdings, First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TeamCarCareHoldingsLLCMember | whf:TeamCarCareHoldingsLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Automotive Retail [Member] | Automotive Retail [Member] | Automotive Retail [Member] | Automotive Retail [Member] | Automotive Retail [Member] | Automotive Retail [Member] | Automotive Retail [Member] | Automotive Retail [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | us-gaap:BaseRateMember | |
| Investment, Interest Rate, Floor | 1% | 1.03% | 1% | 1% | 1% | 1.03% | 1.03% | 1.03% | |
| Investment, Basis Spread, Variable Rate | 7.98% | 7.98% | 7.98% | 7.98% | 7.98% | 7.98% | 7.98% | 7.98% | |
| Investment Interest Rate | 11.83% | 9.02% | 11.83% | 11.83% | 11.83% | 9.02% | 9.02% | 9.02% | |
| Investment, Acquisition Date | Feb. 16, 2018 | Feb. 16, 2018 | |||||||
| Investment Maturity Date | Jun. 28, 2024 | Jun. 28, 2024 | Jun. 28, 2024 | Jun. 28, 2024 | Jun. 28, 2024 | Jun. 28, 2024 | Jun. 28, 2024 | Jun. 28, 2024 | |
| Investment Owned, Balance, Principal Amount | $ 14,363 | $ 15,286 | |||||||
| Investment Owned, at Cost | 14,311 | 15,193 | |||||||
| Investment Owned, at Fair Value | $ 14,363 | $ 15,286 | |||||||
| Investment, Identifier [Axis]: Telestream Holdings Corporation First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | Telestream Holdings Corporation [Member] | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 9.25% | 9.25% | 9.25% | 9.25% | |||||
| Investment Interest Rate | 13.67% | 13.67% | 13.67% | 13.67% | |||||
| Investment, Acquisition Date | May 12, 2022 | ||||||||
| Investment Maturity Date | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | |||||
| Investment Owned, at Fair Value | $ 3 | ||||||||
| Investment, Identifier [Axis]: Telestream Holdings Corporation First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | Telestream Holdings Corporation [Member] | Telestream Holdings Corporation [Member] | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 9.25% | 8.75% | 9.25% | 9.25% | 9.25% | 8.75% | 8.75% | 8.75% | |
| Investment Interest Rate | 13.67% | 9.75% | 13.67% | 13.67% | 13.67% | 9.75% | 9.75% | 9.75% | |
| Investment, Acquisition Date | Oct. 15, 2020 | Oct. 15, 2020 | |||||||
| Investment Maturity Date | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 927 | $ 530 | |||||||
| Investment Owned, at Cost | 910 | 517 | |||||||
| Investment Owned, at Fair Value | $ 928 | $ 549 | |||||||
| Investment, Identifier [Axis]: Telestream Holdings Corporation First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | Telestream Holdings Corporation [Member] | Telestream Holdings Corporation [Member] | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | Technology Hardware, Storage & Peripherals | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 9.25% | 8.75% | 9.25% | 9.25% | 9.25% | 8.75% | 8.75% | 8.75% | |
| Investment Interest Rate | 13.67% | 9.75% | 13.67% | 13.67% | 13.67% | 9.75% | 9.75% | 9.75% | |
| Investment, Acquisition Date | Oct. 15, 2020 | Oct. 15, 2020 | |||||||
| Investment Maturity Date | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | Oct. 15, 2025 | |
| Investment Owned, Balance, Principal Amount | $ 15,846 | $ 15,079 | |||||||
| Investment Owned, at Cost | 15,556 | 14,713 | |||||||
| Investment Owned, at Fair Value | $ 15,762 | $ 15,079 | |||||||
| Investment, Identifier [Axis]: Tensar Corporation First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TensarCorporationMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Investment, Acquisition Date | Nov. 20, 2020 | ||||||||
| Investment Maturity Date | Aug. 20, 2025 | Aug. 20, 2025 | Aug. 20, 2025 | Aug. 20, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 6,930 | ||||||||
| Investment Owned, at Cost | 6,797 | ||||||||
| Investment Owned, at Fair Value | $ 7,069 | ||||||||
| Investment, Identifier [Axis]: Tensar Corporation, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.75%, Rate 7.75%, Due 8/20/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TensarCorporationMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Construction & Engineering | Construction & Engineering | Construction & Engineering | Construction & Engineering | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.75% | 6.75% | 6.75% | 6.75% | |||||
| Investment Interest Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Investment, Acquisition Date | Nov. 24, 2020 | ||||||||
| Investment Maturity Date | Aug. 20, 2025 | Aug. 20, 2025 | Aug. 20, 2025 | Aug. 20, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 6,930 | ||||||||
| Investment Owned, at Cost | 6,797 | ||||||||
| Investment Owned, at Fair Value | $ 7,069 | ||||||||
| Fair Value As A Percentage of Member's Equity | 27.18% | ||||||||
| Investment, Identifier [Axis]: The Kyjen Company, LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TheKyjenCompanyLLCMember | whf:TheKyjenCompanyLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Household Products [Member] | Household Products [Member] | Household Products [Member] | Household Products [Member] | Household Products [Member] | Household Products [Member] | Household Products [Member] | Household Products [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.58% | 6.50% | 6.58% | 6.58% | 6.58% | 6.50% | 6.50% | 6.50% | |
| Investment Interest Rate | 10.90% | 7.50% | 10.90% | 10.90% | 10.90% | 7.50% | 7.50% | 7.50% | |
| Investment, Acquisition Date | Apr. 05, 2021 | Apr. 05, 2021 | |||||||
| Investment Maturity Date | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 798 | $ 385 | |||||||
| Investment Owned, at Cost | 790 | 380 | |||||||
| Investment Owned, at Fair Value | $ 724 | $ 390 | |||||||
| Investment, Interest Rate, Paid in Kind | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Investment, Interest Rate, Paid in Cash | 10.40% | 10.40% | 10.40% | 10.40% | |||||
| Investment, Identifier [Axis]: The Kyjen Company, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TheKyjenCompanyLLCMember | whf:TheKyjenCompanyLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Household Products [Member] | Household Products [Member] | Household Products [Member] | Household Products [Member] | Household Products [Member] | Household Products [Member] | Household Products [Member] | Household Products [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 7% | 6.50% | 7% | 7% | 7% | 6.50% | 6.50% | 6.50% | |
| Investment Interest Rate | 11.65% | 7.50% | 11.65% | 11.65% | 11.65% | 7.50% | 7.50% | 7.50% | |
| Investment, Acquisition Date | Apr. 05, 2021 | Apr. 05, 2021 | |||||||
| Investment Maturity Date | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | Apr. 05, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 11,334 | $ 11,403 | |||||||
| Investment Owned, at Cost | 11,223 | 11,257 | |||||||
| Investment Owned, at Fair Value | $ 10,429 | $ 11,383 | |||||||
| Investment, Interest Rate, Paid in Kind | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Investment, Interest Rate, Paid in Cash | 11.15% | 11.15% | 11.15% | 11.15% | |||||
| Investment, Identifier [Axis]: Token Buyer, Inc First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TokenBuyerIncMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Household Appliances | Household Appliances | Household Appliances | Household Appliances | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 0.50% | 0.50% | 0.50% | 0.50% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 10.73% | 10.73% | 10.73% | 10.73% | |||||
| Investment, Acquisition Date | May 26, 2022 | ||||||||
| Investment Maturity Date | May 31, 2029 | May 31, 2029 | May 31, 2029 | May 31, 2029 | |||||
| Investment Owned, Balance, Principal Amount | $ 7,214 | ||||||||
| Investment Owned, at Cost | 6,680 | ||||||||
| Investment Owned, at Fair Value | $ 6,615 | ||||||||
| Investment, Identifier [Axis]: Trimlite Buyer LLC First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TrimliteBuyerLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | Jul. 27, 2021 | ||||||||
| Investment Maturity Date | Jul. 27, 2026 | Jul. 27, 2026 | Jul. 27, 2026 | Jul. 27, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 164 | ||||||||
| Investment Owned, at Cost | 161 | ||||||||
| Investment Owned, at Fair Value | $ 161 | ||||||||
| Investment, Identifier [Axis]: Trimlite Buyer LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TrimliteBuyerLLCMember | whf:TrimliteBuyerLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | Building Products | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | Canadian Dollar Offered Rate | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6% | 6.50% | 6% | 6% | 6% | 6.50% | 6.50% | 6.50% | |
| Investment Interest Rate | 10.88% | 7.50% | 10.88% | 10.88% | 10.88% | 7.50% | 7.50% | 7.50% | |
| Investment, Acquisition Date | Jul. 27, 2021 | Jul. 27, 2021 | |||||||
| Investment Maturity Date | Jul. 27, 2026 | Jul. 27, 2026 | Jul. 27, 2026 | Jul. 27, 2026 | Jul. 27, 2026 | Jul. 27, 2026 | Jul. 27, 2026 | Jul. 27, 2026 | |
| Investment Owned, Balance, Principal Amount | $ 20,582 | $ 22,977 | |||||||
| Investment Owned, at Cost | 16,162 | 17,975 | |||||||
| Investment Owned, at Fair Value | $ 14,926 | $ 17,841 | |||||||
| Investment, Identifier [Axis]: True Blue Car Wash, LLC First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TrueBlueCarWashLLCMember | whf:TrueBlueCarWashLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Research & Consulting Services | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.50% | 6.82% | 6.50% | 6.50% | 6.50% | 6.82% | 6.82% | 6.82% | |
| Investment Interest Rate | 10.92% | 7.82% | 10.92% | 10.92% | 10.92% | 7.82% | 7.82% | 7.82% | |
| Investment, Acquisition Date | Oct. 17, 2019 | Oct. 17, 2019 | |||||||
| Investment Maturity Date | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | |
| Investment Owned, Balance, Principal Amount | $ 4,160 | $ 3,103 | |||||||
| Investment Owned, at Cost | 4,107 | 3,073 | |||||||
| Investment Owned, at Fair Value | $ 4,189 | $ 3,098 | |||||||
| Investment, Identifier [Axis]: True Blue Car Wash, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TrueBlueCarWashLLCMember | whf:TrueBlueCarWashLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Consumer Services [Member] | Research & Consulting Services | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Specialized Consumer Services [Member] | Research & Consulting Services | Research & Consulting Services | Research & Consulting Services | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | |
| Investment, Basis Spread, Variable Rate | 6.88% | 6.82% | 6.88% | 6.88% | 6.88% | 6.82% | 6.82% | 6.82% | |
| Investment Interest Rate | 11.30% | 7.82% | 11.30% | 11.30% | 11.30% | 7.82% | 7.82% | 7.82% | |
| Investment, Acquisition Date | Oct. 17, 2019 | Oct. 17, 2019 | |||||||
| Investment Maturity Date | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | Oct. 17, 2024 | |
| Investment Owned, Balance, Principal Amount | $ 9,903 | $ 8,203 | |||||||
| Investment Owned, at Cost | 9,822 | 8,087 | |||||||
| Investment Owned, at Fair Value | $ 9,942 | $ 8,130 | |||||||
| Investment, Identifier [Axis]: Turnberry Solutions, Inc., First Lien Secured Revolving Loan, Floor 3.25%, Spread P plus 5.00%, Rate 8.25%, Due 9/2/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TurnberrySolutionsInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | us-gaap:PrimeRateMember | |||||
| Investment, Interest Rate, Floor | 3.25% | 3.25% | 3.25% | 3.25% | |||||
| Investment, Basis Spread, Variable Rate | 5% | 5% | 5% | 5% | |||||
| Investment Interest Rate | 8.25% | 8.25% | 8.25% | 8.25% | |||||
| Investment, Acquisition Date | Aug. 10, 2021 | ||||||||
| Investment Maturity Date | Sep. 02, 2026 | Sep. 02, 2026 | Sep. 02, 2026 | Sep. 02, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 86 | ||||||||
| Investment Owned, at Cost | 84 | ||||||||
| Investment Owned, at Fair Value | $ 85 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.33% | ||||||||
| Investment, Identifier [Axis]: Turnberry Solutions, Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 9/2/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TurnberrySolutionsInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Aug. 10, 2021 | ||||||||
| Investment Maturity Date | Sep. 02, 2026 | Sep. 02, 2026 | Sep. 02, 2026 | Sep. 02, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 5,791 | ||||||||
| Investment Owned, at Cost | 5,689 | ||||||||
| Investment Owned, at Fair Value | $ 5,684 | ||||||||
| Fair Value As A Percentage of Member's Equity | 21.85% | ||||||||
| Investment, Identifier [Axis]: Turnberry Solutions., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 6.00%, Rate 9.19%, Due 9/2/28 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TurnberrySolutionsInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 9.19% | 9.19% | 9.19% | 9.19% | |||||
| Investment, Acquisition Date | Aug. 10, 2021 | ||||||||
| Investment Maturity Date | Sep. 02, 2026 | Sep. 02, 2026 | Sep. 02, 2026 | Sep. 02, 2026 | |||||
| Investment Owned, at Fair Value | $ (4) | ||||||||
| Fair Value As A Percentage of Member's Equity | (0.01%) | ||||||||
| Investment, Identifier [Axis]: Turnberry Solutions., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.00%, Rate 9.19%, Due 9/2/26 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:TurnberrySolutionsInc.Member | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | IT Consulting And Other Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 9.19% | 9.19% | 9.19% | 9.19% | |||||
| Investment, Acquisition Date | Aug. 10, 2021 | ||||||||
| Investment Maturity Date | Sep. 02, 2026 | Sep. 02, 2026 | Sep. 02, 2026 | Sep. 02, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 6,087 | ||||||||
| Investment Owned, at Cost | 5,998 | ||||||||
| Investment Owned, at Fair Value | $ 5,964 | ||||||||
| Fair Value As A Percentage of Member's Equity | 19.72% | ||||||||
| Investment, Identifier [Axis]: US Methanol Midco LLC (d/b/a US Methanol LLC) First Lien Secured Delayed Draw Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:UsMethanolMidcoLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Commodity Chemicals [Member] | Commodity Chemicals [Member] | Commodity Chemicals [Member] | Commodity Chemicals [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Investment, Acquisition Date | Dec. 20, 2022 | ||||||||
| Investment Maturity Date | Dec. 20, 2027 | Dec. 20, 2027 | Dec. 20, 2027 | Dec. 20, 2027 | |||||
| Investment, Identifier [Axis]: US Methanol Midco LLC (d/b/a US Methanol LLC) First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:UsMethanolMidcoLlcMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Commodity Chemicals [Member] | Commodity Chemicals [Member] | Commodity Chemicals [Member] | Commodity Chemicals [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 7.75% | 7.75% | 7.75% | 7.75% | |||||
| Investment, Acquisition Date | Dec. 20, 2022 | ||||||||
| Investment Maturity Date | Dec. 20, 2027 | Dec. 20, 2027 | Dec. 20, 2027 | Dec. 20, 2027 | |||||
| Investment Owned, Balance, Principal Amount | $ 4,667 | ||||||||
| Investment Owned, at Cost | 4,551 | ||||||||
| Investment Owned, at Fair Value | $ 4,551 | ||||||||
| Investment, Interest Rate, Paid in Kind | 12.17% | 12.17% | 12.17% | 12.17% | |||||
| Investment, Identifier [Axis]: Unleashed Brands, LLC, First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 5.50%, Rate 6.50%, Due 11/19/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:UnleashedBrandsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | whf:FirstLienSecuredDelayedDrawLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 5.50% | 5.50% | 5.50% | 5.50% | |||||
| Investment Interest Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment, Acquisition Date | Nov. 30, 2021 | ||||||||
| Investment Maturity Date | Nov. 19, 2026 | Nov. 19, 2026 | Nov. 19, 2026 | Nov. 19, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 5,133 | ||||||||
| Investment Owned, at Cost | 5,083 | ||||||||
| Investment Owned, at Fair Value | $ 5,082 | ||||||||
| Fair Value As A Percentage of Member's Equity | 19.54% | ||||||||
| Investment, Identifier [Axis]: Unleashed Brands, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 5.50%, Rate 6.50%, Due 11/19/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:UnleashedBrandsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 5.50% | 5.50% | 5.50% | 5.50% | |||||
| Investment Interest Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment, Acquisition Date | Nov. 30, 2021 | ||||||||
| Investment Maturity Date | Nov. 19, 2026 | Nov. 19, 2026 | Nov. 19, 2026 | Nov. 19, 2026 | |||||
| Investment, Identifier [Axis]: Unleashed Brands, LLC, First Lien Secured Term Loan, Floor 1.00%, Spread L plus 5.50%, Rate 6.50%, Due 11/19/2026 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:UnleashedBrandsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Leisure Products | Leisure Products | Leisure Products | Leisure Products | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 5.50% | 5.50% | 5.50% | 5.50% | |||||
| Investment Interest Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment, Acquisition Date | Nov. 30, 2021 | ||||||||
| Investment Maturity Date | Nov. 19, 2026 | Nov. 19, 2026 | Nov. 19, 2026 | Nov. 19, 2026 | |||||
| Investment Owned, Balance, Principal Amount | $ 3,887 | ||||||||
| Investment Owned, at Cost | 3,848 | ||||||||
| Investment Owned, at Fair Value | $ 3,848 | ||||||||
| Fair Value As A Percentage of Member's Equity | 14.79% | ||||||||
| Investment, Identifier [Axis]: WH Lessor Corp. First Lien Secured Revolving Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:WHLessorCorpMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 5.59% | 5.59% | 5.59% | 5.59% | |||||
| Investment Interest Rate | 9.97% | 9.97% | 9.97% | 9.97% | |||||
| Investment, Acquisition Date | Jan. 22, 2020 | ||||||||
| Investment Maturity Date | Dec. 26, 2024 | Dec. 26, 2024 | Dec. 26, 2024 | Dec. 26, 2024 | |||||
| Investment Owned, at Fair Value | $ 4 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.01% | ||||||||
| Investment, Identifier [Axis]: WH Lessor Corp. First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:WHLessorCorpMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | Electronic Equipment & Instruments | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 5.59% | 5.59% | 5.59% | 5.59% | |||||
| Investment Interest Rate | 9.97% | 9.97% | 9.97% | 9.97% | |||||
| Investment, Acquisition Date | Jan. 22, 2020 | ||||||||
| Investment Maturity Date | Dec. 26, 2024 | Dec. 26, 2024 | Dec. 26, 2024 | Dec. 26, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 7,470 | ||||||||
| Investment Owned, at Cost | 7,402 | ||||||||
| Investment Owned, at Fair Value | $ 7,470 | ||||||||
| Fair Value As A Percentage of Member's Equity | 24.70% | ||||||||
| Investment, Identifier [Axis]: WH Lessor Corp., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/26/2024 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:WHLessorCorpMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | whf:FirstLienSecuredRevolvingLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Jan. 22, 2020 | ||||||||
| Investment Maturity Date | Dec. 26, 2024 | Dec. 26, 2024 | Dec. 26, 2024 | Dec. 26, 2024 | |||||
| Investment Owned, at Fair Value | $ 6 | ||||||||
| Fair Value As A Percentage of Member's Equity | 0.02% | ||||||||
| Investment, Identifier [Axis]: WH Lessor Corp., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.00%, Rate 7.00%, Due 12/26/2024 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:WHLessorCorpMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | Environmental & Facilities Services | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6% | 6% | 6% | 6% | |||||
| Investment Interest Rate | 7% | 7% | 7% | 7% | |||||
| Investment, Acquisition Date | Jan. 22, 2020 | ||||||||
| Investment Maturity Date | Dec. 26, 2024 | Dec. 26, 2024 | Dec. 26, 2024 | Dec. 26, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 6,870 | ||||||||
| Investment Owned, at Cost | 6,780 | ||||||||
| Investment Owned, at Fair Value | $ 6,866 | ||||||||
| Fair Value As A Percentage of Member's Equity | 26.40% | ||||||||
| Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Equity | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:WHFSTRSOhioSeniorLoanFundLLCMember | whf:WHFSTRSOhioSeniorLoanFundLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | Equity Investments | Equity Investments | Equity Investments | Equity Investments | Equity Investments | Equity Investments | Equity Investments | Equity Investments | |
| Investment Owned, at Fair Value | $ 20,160 | $ 15,607 | 10,167 | ||||||
| Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Interests | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:WHFSTRSOhioSeniorLoanFundMember | whf:WHFSTRSOhioSeniorLoanFundMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:LLCInterestsMember | whf:LLCInterestsMember | whf:LLCInterestsMember | whf:LLCInterestsMember | whf:LLCInterestsMember | whf:LLCInterestsMember | whf:LLCInterestsMember | whf:LLCInterestsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | |
| Investment, Acquisition Date | Jul. 19, 2019 | Jul. 19, 2019 | |||||||
| Investment Owned, Balance, Principal Amount | $ 20,000 | $ 15,000 | |||||||
| Investment Owned, at Cost | 20,000 | 15,000 | |||||||
| Investment Owned, at Fair Value | $ 20,160 | $ 15,607 | |||||||
| Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Subordinated Note | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:WHFSTRSOhioSeniorLoanFundLLCMember | whf:WHFSTRSOhioSeniorLoanFundLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | Subordinated Debt [Member] | Subordinated Debt [Member] | Subordinated Debt [Member] | Subordinated Debt [Member] | Subordinated Debt [Member] | Subordinated Debt [Member] | Subordinated Debt [Member] | Subordinated Debt [Member] | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | Specialized Finance [Member] | |
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | |
| Investment Interest Rate | 10.67% | 6.61% | 10.67% | 10.67% | 10.67% | 6.61% | 6.61% | 6.61% | |
| Investment, Acquisition Date | Jul. 19, 2019 | Jul. 19, 2019 | |||||||
| Investment Owned, Balance, Principal Amount | $ 80,000 | $ 60,000 | |||||||
| Investment Owned, at Cost | 80,000 | 60,000 | |||||||
| Investment Owned, at Fair Value | $ 80,000 | $ 60,000 | $ 41,073 | ||||||
| Investment, Identifier [Axis]: Westrock Coffee Company, LLC, First lien Secured Term Loan, Floor 1.50%, Spread L plus 8.50%, Rate 10.00% (9.75% Cash + 0.25% PIK), Due 2/28/2025 | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:WestrockCoffeeCompanyLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | whf:FirstLienSecuredLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | Packaged Foods & Meats | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1.50% | 1.50% | 1.50% | 1.50% | |||||
| Investment, Basis Spread, Variable Rate | 8.50% | 8.50% | 8.50% | 8.50% | |||||
| Investment Interest Rate | 10% | 10% | 10% | 10% | |||||
| Investment, Acquisition Date | Mar. 20, 2020 | ||||||||
| Investment Maturity Date | Feb. 28, 2025 | Feb. 28, 2025 | Feb. 28, 2025 | Feb. 28, 2025 | |||||
| Investment Owned, Balance, Principal Amount | $ 9,105 | ||||||||
| Investment Owned, at Cost | 9,033 | ||||||||
| Investment Owned, at Fair Value | $ 8,923 | ||||||||
| Investment, Interest Rate, Paid in Kind | 0.25% | 0.25% | 0.25% | 0.25% | |||||
| Investment, Interest Rate, Paid in Cash | 9.75% | 9.75% | 9.75% | 9.75% | |||||
| Fair Value As A Percentage of Member's Equity | 34.31% | ||||||||
| Investment, Identifier [Axis]: What If Holdings, LLC First Lien Secured Term Loan | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:WhatIfHoldingsLLCMember | ||||||||
| Investment, Type [Extensible Enumeration] | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | whf:FirstLienSecuredTermLoanMember | |||||
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |||||
| Investment, Industry Sector [Extensible Enumeration] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | |||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | |||||
| Investment, Interest Rate, Floor | 1% | 1% | 1% | 1% | |||||
| Investment, Basis Spread, Variable Rate | 6.50% | 6.50% | 6.50% | 6.50% | |||||
| Investment Interest Rate | 7.50% | 7.50% | 7.50% | 7.50% | |||||
| Investment, Acquisition Date | Oct. 02, 2019 | ||||||||
| Investment Maturity Date | Oct. 02, 2024 | Oct. 02, 2024 | Oct. 02, 2024 | Oct. 02, 2024 | |||||
| Investment Owned, Balance, Principal Amount | $ 18,848 | ||||||||
| Investment Owned, at Cost | 18,609 | ||||||||
| Investment Owned, at Fair Value | $ 18,759 | ||||||||
| Investment, Identifier [Axis]: What If Media Group, LLC Common Units | |||||||||
| Schedule of Investments [Line Items] | |||||||||
| Investment, Issuer Name [Extensible Enumeration] | whf:WhatIfMediaGroupLLCMember | whf:WhatIfMediaGroupLLCMember | |||||||
| Investment, Type [Extensible Enumeration] | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | whf:CommonUnitsMember | |
| Investment, Issuer Geographic Region [Extensible Enumeration] | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | srt:NorthAmericaMember | |
| Investment, Industry Sector [Extensible Enumeration] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | Interactive Media And Services [Member] | |
| Investment, Acquisition Date | Jul. 02, 2021 | Jul. 02, 2021 | |||||||
| Investment Owned, Balance, Principal Amount | $ 851 | $ 8 | |||||||
| Investment Owned, at Cost | 851 | 850 | |||||||
| Investment Owned, at Fair Value | $ 1,943 | $ 1,398 | |||||||
INVESTMENTS - Superscript (Deta
| INVESTMENTS - Superscript (Details) - USD ($) $ in Thousands | 12 Months Ended | |
| Dec. 31, 2022 | Dec. 31, 2021 | |
| Schedule of Investments [Line Items] | ||
| STRS JV's portfolio company investments as a percentage of members' equity | 228.75% | 234.24% |
| STRS JV's portfolio company investments as a percentage of total assets | 95% | |
| PIK interest rate | 12.17% | |
| One-month LIBOR | 0.10% | |
| Three-month LIBOR | 0.21% | |
| Six-month LIBOR | 0.34% | |
| One-month GBP LIBOR | 0.19% | |
| Three-month GBP LIBOR | 0.26% | |
| Six-month GBP LIBOR | 0.47% | |
| Three-month Euro EurIBOR | 0.57% | |
| CDOR | 0.52% | |
| Prime | 3.25% | |
| STRS JV | ||
| Schedule of Investments [Line Items] | ||
| STRS JV's portfolio company investments as a percentage of members' equity | 940% | 998% |
| STRS JV's portfolio company investments as a percentage of total assets | 93% | |
| PIK interest rate | 7% | |
| Outstanding commitments to fund investments | $ 24,549 | $ 22,883 |
| Investments on non-accrual | $ 0 | $ 0 |
INVESTMENTS - Selected Balance
| INVESTMENTS - Selected Balance Sheet Information For STRS JV (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 |
| Assets | |||
| Investments | $ 760,228 | $ 819,208 | |
| Cash and cash equivalents | 9,508 | 12,185 | $ 8,062 |
| Total assets | 796,474 | 851,019 | |
| Liabilities | |||
| Credit facility | 440,427 | 475,958 | |
| Interest payable on credit facility | 2,774 | 2,087 | |
| Unrealized depreciation on foreign currency forward contracts | 3 | ||
| Total liabilities | 464,087 | 501,268 | |
| Total liabilities and total net assets | 796,474 | 851,019 | |
| Investments, amortized cost | 782,429 | 831,960 | |
| Unamortized debt issuance costs | 4,718 | 5,679 | |
| STRS JV | |||
| Assets | |||
| Investments | 284,259 | 259,510 | |
| Cash and cash equivalents | 18,960 | 13,004 | |
| Interest receivable | 1,404 | 735 | |
| Unrealized appreciation on foreign currency forward contracts | 19 | ||
| Other assets | 673 | 255 | |
| Total assets | 305,296 | 273,523 | |
| Liabilities | |||
| Credit facility | 150,634 | 145,003 | |
| Note payable to members | 120,000 | 100,000 | |
| Interest payable on credit facility | 796 | 282 | |
| Interest payable on notes to members | 3,069 | 1,575 | |
| Unrealized depreciation on foreign currency forward contracts | 75 | ||
| Other liabilities | 483 | 651 | |
| Total liabilities | 275,057 | 247,511 | |
| Members' equity | 30,239 | 26,012 | |
| Total liabilities and total net assets | 305,296 | 273,523 | |
| Investments, amortized cost | 287,940 | 260,472 | |
| Unamortized debt issuance costs | $ 1,643 | $ 1,779 |
INVESTMENTS - Selected Statemen
| INVESTMENTS - Selected Statement of Operations Information For STRS JV (Details) - USD ($) $ in Thousands | 12 Months Ended | ||
| Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | |
| Schedule of Investments [Line Items] | |||
| Total investment income | $ 87,527 | $ 72,143 | $ 61,699 |
| Administrative service fees | 683 | 683 | 683 |
| Total expenses | 49,245 | 42,348 | 36,800 |
| Net investment income after excise tax | 37,258 | 28,791 | 24,157 |
| Net increase in net assets resulting from operations | 15,683 | 30,094 | 31,685 |
| STRS JV | |||
| Schedule of Investments [Line Items] | |||
| Interest income | 28,956 | 18,819 | 13,316 |
| Total investment income | 28,956 | 18,819 | 13,316 |
| Interest expense on credit facility | 7,470 | 4,105 | 3,256 |
| Interest expense on notes to members | 9,680 | 5,512 | 4,465 |
| Administrative service fees | 629 | 443 | 308 |
| Other expenses | 564 | 498 | 317 |
| Total expenses | 18,343 | 10,558 | 8,346 |
| Net investment income after excise tax | 10,613 | 8,261 | 4,970 |
| Net realized gains (losses) on investments and foreign currency transactions | 329 | (55) | (10) |
| Net change in unrealized appreciation (depreciation) on investments and foreign currency transactions | (875) | 1,153 | (2,799) |
| Net increase in net assets resulting from operations | $ 10,067 | $ 9,359 | $ 2,161 |
FAIR VALUE MEASUREMENTS (Detail
| FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 |
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 760,228 | $ 819,208 |
| First lien secured loans | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 618,267 | 697,232 |
| Second lien secured loans | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 20,634 | 23,650 |
| Subordinated unsecured loans | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 167 | 167 |
| Subordinated Note to STRS JV | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 80,000 | 60,000 |
| Equity (excluding STRS JV) | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 21,000 | 22,552 |
| Equity in STRS JV | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 20,160 | 15,607 |
| Level 2 | Foreign currency forward contracts | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | (3) | |
| Level 3 | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 740,068 | 803,601 |
| Level 3 | First lien secured loans | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 618,267 | 697,232 |
| Level 3 | Second lien secured loans | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 20,634 | 23,650 |
| Level 3 | Subordinated unsecured loans | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 167 | 167 |
| Level 3 | Subordinated Note to STRS JV | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 80,000 | 60,000 |
| Level 3 | Equity (excluding STRS JV) | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 21,000 | $ 22,552 |
FAIR VALUE MEASUREMENTS - Level
| FAIR VALUE MEASUREMENTS - Level 3 Reconciliation (Details) - USD ($) $ in Thousands | 12 Months Ended | |
| Dec. 31, 2022 | Dec. 31, 2021 | |
| Fair value measurements | ||
| Fair value, beginning of period | $ 803,601 | $ 680,568 |
| Funding of investments | 300,089 | 563,092 |
| Non-cash interest income | 2,355 | 1,164 |
| Accretion of discount (premium) | 5,626 | 6,821 |
| Proceeds from paydowns and sales | (348,081) | (447,291) |
| Realized gains (losses) | $ (14,518) | 8,012 |
| Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Gain (Loss) on Sale of Investments | |
| Net unrealized (depreciation) appreciation | $ (9,004) | (8,765) |
| Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Debt and Equity Securities, Unrealized Gain (Loss) | |
| Fair value, end of period | $ 740,068 | 803,601 |
| Change in unrealized appreciation (depreciation) on investments still held | (20,988) | (689) |
| First lien secured loans | ||
| Fair value measurements | ||
| Fair value, beginning of period | 697,232 | 588,580 |
| Funding of investments | 278,236 | 518,604 |
| Non-cash interest income | 2,217 | 1,159 |
| Accretion of discount (premium) | 5,540 | 6,605 |
| Proceeds from paydowns and sales | (343,181) | (413,333) |
| Conversions | (4,060) | |
| Realized gains (losses) | (16,975) | 8,024 |
| Net unrealized (depreciation) appreciation | (742) | (12,407) |
| Fair value, end of period | 618,267 | 697,232 |
| Change in unrealized appreciation (depreciation) on investments still held | (12,278) | (3,751) |
| Second lien secured loans | ||
| Fair value measurements | ||
| Fair value, beginning of period | 23,650 | 27,596 |
| Funding of investments | 19,475 | |
| Non-cash interest income | 138 | 5 |
| Accretion of discount (premium) | 86 | 241 |
| Proceeds from paydowns and sales | (23,608) | |
| Realized gains (losses) | (1,024) | |
| Net unrealized (depreciation) appreciation | (2,216) | (59) |
| Fair value, end of period | 20,634 | 23,650 |
| Change in unrealized appreciation (depreciation) on investments still held | (3,241) | 123 |
| Subordinated Notes | ||
| Fair value measurements | ||
| Fair value, beginning of period | 167 | |
| Funding of investments | 498 | |
| Proceeds from paydowns and sales | (331) | |
| Fair value, end of period | 167 | 167 |
| Subordinated Note to STRS JV | ||
| Fair value measurements | ||
| Fair value, beginning of period | 60,000 | 41,073 |
| Funding of investments | 20,000 | 18,927 |
| Fair value, end of period | 80,000 | 60,000 |
| Equity (excluding STRS JV) | ||
| Fair value measurements | ||
| Fair value, beginning of period | 22,552 | 23,319 |
| Funding of investments | 1,853 | 5,588 |
| Accretion of discount (premium) | (25) | |
| Proceeds from paydowns and sales | (4,900) | (10,019) |
| Conversions | 4,060 | |
| Realized gains (losses) | 3,481 | (12) |
| Net unrealized (depreciation) appreciation | (6,046) | 3,701 |
| Fair value, end of period | 21,000 | 22,552 |
| Change in unrealized appreciation (depreciation) on investments still held | $ (5,469) | $ 2,939 |
FAIR VALUE MEASUREMENTS - Quant
| FAIR VALUE MEASUREMENTS - Quantitative information (Details) $ in Thousands | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) $ / shares |
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 760,228 | $ 819,208 |
| First lien secured loans | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 618,267 | 697,232 |
| Second lien secured loans | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 20,634 | 23,650 |
| Subordinated unsecured loans | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 167 | 167 |
| Subordinated Notes | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 167 | 167 |
| Subordinated Note to STRS JV | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 80,000 | 60,000 |
| Level 3 | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 740,068 | 803,601 |
| Level 3 | First lien secured loans | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 618,267 | 697,232 |
| Level 3 | First lien secured loans | Discounted cash flows | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 536,259 | $ 358,921 |
| Level 3 | First lien secured loans | Discounted cash flows | Discount rate | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.100 | 0.045 |
| Level 3 | First lien secured loans | Discounted cash flows | Discount rate | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.300 | 0.218 |
| Level 3 | First lien secured loans | Discounted cash flows | Discount rate | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | (0.138) | 0.098 |
| Level 3 | First lien secured loans | Discounted cash flows | Exit EBITDA Multiple | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.055 | |
| Level 3 | First lien secured loans | Discounted cash flows | Exit EBITDA Multiple | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.150 | |
| Level 3 | First lien secured loans | Discounted cash flows | Exit EBITDA Multiple | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.083 | |
| Level 3 | First lien secured loans | Recent transaction | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 67,878 | |
| Level 3 | First lien secured loans | Recent transaction | Transaction price | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 209,892 | |
| Level 3 | First lien secured loans | Recent transaction | Transaction price | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.831 | 0.945 |
| Level 3 | First lien secured loans | Recent transaction | Transaction price | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 1 | 0.991 |
| Level 3 | First lien secured loans | Recent transaction | Transaction price | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | (0.950) | 0.979 |
| Level 3 | First lien secured loans | Discounted cash flows and Recent transaction | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 113,808 | |
| Level 3 | First lien secured loans | Discounted cash flows and Recent transaction | Discount rate | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.072 | |
| Level 3 | First lien secured loans | Discounted cash flows and Recent transaction | Discount rate | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.103 | |
| Level 3 | First lien secured loans | Discounted cash flows and Recent transaction | Discount rate | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.086 | |
| Level 3 | First lien secured loans | Discounted cash flows and Recent transaction | Transaction price | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.975 | |
| Level 3 | First lien secured loans | Discounted cash flows and Recent transaction | Transaction price | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.988 | |
| Level 3 | First lien secured loans | Discounted cash flows and Recent transaction | Transaction price | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.984 | |
| Level 3 | First lien secured loans | Discounted cash flows and Recent transaction | Exit EBITDA Multiple | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.070 | |
| Level 3 | First lien secured loans | Discounted cash flows and Recent transaction | Exit EBITDA Multiple | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.110 | |
| Level 3 | First lien secured loans | Discounted cash flows and Recent transaction | Exit EBITDA Multiple | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.095 | |
| Level 3 | First lien secured loans | Guideline public companies | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 7,542 | |
| Level 3 | First lien secured loans | Guideline public companies | EBITDA Multiple Range | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.051 | |
| Level 3 | First lien secured loans | Expected repayment | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 14,130 | $ 7,069 |
| Level 3 | First lien secured loans | Expected repayment | Transaction price | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 1 | |
| Level 3 | First lien secured loans | Expected repayment | Transaction price | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 1.010 | |
| Level 3 | First lien secured loans | Expected repayment | Transaction price | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | (1.005) | |
| Level 3 | Second lien secured loans | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 20,634 | 23,650 |
| Level 3 | Second lien secured loans | Discounted cash flows | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 20,634 | $ 18,725 |
| Level 3 | Second lien secured loans | Discounted cash flows | Discount rate | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.132 | 0.115 |
| Level 3 | Second lien secured loans | Discounted cash flows | Discount rate | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.250 | 0.223 |
| Level 3 | Second lien secured loans | Discounted cash flows | Discount rate | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | (0.189) | 0.142 |
| Level 3 | Second lien secured loans | Discounted cash flows | Exit EBITDA Multiple | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.065 | |
| Level 3 | Second lien secured loans | Discounted cash flows | Exit EBITDA Multiple | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.085 | |
| Level 3 | Second lien secured loans | Discounted cash flows | Exit EBITDA Multiple | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.080 | |
| Level 3 | Second lien secured loans | Recent transaction | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 4,925 | |
| Level 3 | Second lien secured loans | Recent transaction | Transaction price | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.985 | |
| Level 3 | Subordinated unsecured loans | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 167 | $ 167 |
| Level 3 | Subordinated unsecured loans | Discounted cash flows | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 167 | |
| Level 3 | Subordinated unsecured loans | Discounted cash flows | Discount rate | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.040 | |
| Level 3 | Subordinated unsecured loans | Discounted cash flows | Discount rate | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.040 | |
| Level 3 | Subordinated unsecured loans | Discounted cash flows | Discount rate | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | (0.040) | |
| Level 3 | Subordinated Notes | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 60,167 | |
| Level 3 | Subordinated Notes | Recent transaction | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 167 | |
| Level 3 | Subordinated Notes | Recent transaction | Transaction price | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 1 | |
| Level 3 | Subordinated Notes | Enterprise value | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 60,000 | |
| Level 3 | Subordinated Note to STRS JV | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 80,000 | 60,000 |
| Level 3 | Subordinated Note to STRS JV | Enterprise value | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 80,000 | |
| Level 3 | Preferred Equity | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | 2,811 | |
| Level 3 | Preferred Equity | Revenue Multiple | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | (0.005) | |
| Level 3 | Preferred Equity | Discounted cash flows | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 714 | |
| Level 3 | Preferred Equity | Discounted cash flows | Discount rate | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.200 | |
| Level 3 | Preferred Equity | Discounted cash flows | Discount rate | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.225 | |
| Level 3 | Preferred Equity | Discounted cash flows | Discount rate | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | (0.200) | |
| Level 3 | Preferred Equity | Recent transaction | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 200 | |
| Level 3 | Preferred Equity | Recent transaction | Transaction price | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 1,007 | |
| Level 3 | Preferred Equity | Recent transaction | Transaction price | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.010 | 1 |
| Level 3 | Preferred Equity | Recent transaction | Transaction price | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.010 | 56.30 |
| Level 3 | Preferred Equity | Recent transaction | Transaction price | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | (0.010) | 47.13 |
| Level 3 | Preferred Equity | Similar Transaction | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 1,018 | |
| Level 3 | Preferred Equity | Similar Transaction | EBITDA Multiple Range | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.097 | |
| Level 3 | Preferred Equity | Similar Transaction | Discount for lack of marketability | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.150 | |
| Level 3 | Preferred Equity | Discounted Cash Flows and Guideline Public Companies | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 786 | |
| Level 3 | Preferred Equity | Discounted Cash Flows and Guideline Public Companies | Discount rate | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.173 | |
| Level 3 | Preferred Equity | Discounted Cash Flows and Guideline Public Companies | Exit EBITDA Multiple | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.110 | |
| Level 3 | Preferred Equity | Discounted Cash Flows and Guideline Public Companies | EBITDA Multiple Range | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.079 | |
| Level 3 | Preferred Equity | Discounted Cash Flows and Guideline Public Companies | NFY EBITDA Multiple | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.075 | |
| Level 3 | Preferred Equity | Discounted Cash Flows and Guideline Public Companies | Discount for lack of marketability | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.100 | |
| Level 3 | Preferred Equity | Enterprise value | EBITDA Multiple Range | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 194 | |
| Level 3 | Preferred Equity | Enterprise value | EBITDA Multiple Range | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.080 | |
| Level 3 | Preferred Equity | Enterprise value | EBITDA Multiple Range | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.095 | |
| Level 3 | Preferred Equity | Enterprise value | EBITDA Multiple Range | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | (0.086) | |
| Level 3 | Preferred Equity | Enterprise value | Revenue Multiple | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 926 | |
| Level 3 | Preferred Equity | Enterprise value | Revenue Multiple | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.005 | |
| Level 3 | Preferred Equity | Enterprise value | Revenue Multiple | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.005 | |
| Level 3 | Common Equity | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 15,280 | |
| Level 3 | Common Equity | Transaction price | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | $ / shares | 1 | |
| Level 3 | Common Equity | Discounted cash flows | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 9,990 | $ 3,602 |
| Level 3 | Common Equity | Discounted cash flows | Discount rate | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.156 | 0.130 |
| Level 3 | Common Equity | Discounted cash flows | Discount rate | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.259 | 0.227 |
| Level 3 | Common Equity | Discounted cash flows | Discount rate | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | (0.224) | 0.150 |
| Level 3 | Common Equity | Discounted cash flows | Exit EBITDA Multiple | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.086 | |
| Level 3 | Common Equity | Discounted cash flows | Exit EBITDA Multiple | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.100 | |
| Level 3 | Common Equity | Discounted cash flows | Exit EBITDA Multiple | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.096 | |
| Level 3 | Common Equity | Discounted cash flows | Discount for lack of marketability | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.100 | |
| Level 3 | Common Equity | Discounted cash flows | Discount for lack of marketability | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.150 | |
| Level 3 | Common Equity | Discounted cash flows | Discount for lack of marketability | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.103 | |
| Level 3 | Common Equity | Recent transaction | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 400 | |
| Level 3 | Common Equity | Recent transaction | Transaction price | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 1,502 | |
| Level 3 | Common Equity | Recent transaction | Transaction price | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.010 | 1 |
| Level 3 | Common Equity | Recent transaction | Transaction price | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.010 | 1,000 |
| Level 3 | Common Equity | Recent transaction | Transaction price | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | (0.010) | 289.95 |
| Level 3 | Common Equity | Similar Transaction | Exit EBITDA Multiple | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 2,052 | |
| Level 3 | Common Equity | Similar Transaction | EBITDA Multiple Range | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.060 | |
| Level 3 | Common Equity | Similar Transaction | EBITDA Multiple Range | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.134 | |
| Level 3 | Common Equity | Similar Transaction | EBITDA Multiple Range | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.105 | |
| Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 8,124 | |
| Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | Discount rate | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.140 | |
| Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | Discount rate | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.190 | |
| Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | Discount rate | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.182 | |
| Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | Exit EBITDA Multiple | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.080 | |
| Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | Exit EBITDA Multiple | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.110 | |
| Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | Exit EBITDA Multiple | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.105 | |
| Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | NFY EBITDA Multiple | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.086 | |
| Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | NFY EBITDA Multiple | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.108 | |
| Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | NFY EBITDA Multiple | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.089 | |
| Level 3 | Common Equity | Discounted Cash Flows, Guideline Public Companies and Expected Repayment | Discount for lack of marketability | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.100 | |
| Level 3 | Common Equity | Enterprise value | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 4,735 | |
| Level 3 | Common Equity | Enterprise value | EBITDA Multiple Range | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.050 | |
| Level 3 | Common Equity | Enterprise value | EBITDA Multiple Range | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.118 | |
| Level 3 | Common Equity | Enterprise value | EBITDA Multiple Range | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.083 | |
| Level 3 | Warrant | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 4,461 | |
| Level 3 | Warrant | Discounted cash flows | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 3,841 | |
| Level 3 | Warrant | Discounted cash flows | Discount rate | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.259 | |
| Level 3 | Warrant | Discounted cash flows | Discount rate | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.272 | |
| Level 3 | Warrant | Discounted cash flows | Discount rate | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | (0.272) | |
| Level 3 | Warrant | Recent transaction and Enterprise Value | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments | $ 4,461 | |
| Level 3 | Warrant | Discounted cash flows and Option-pricing method | Discount rate | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.227 | |
| Level 3 | Warrant | Discounted cash flows and Option-pricing method | Discount rate | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.295 | |
| Level 3 | Warrant | Discounted cash flows and Option-pricing method | Discount rate | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.292 | |
| Level 3 | Warrant | Discounted cash flows and Option-pricing method | Exit EBITDA Multiple | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.055 | |
| Level 3 | Warrant | Discounted cash flows and Option-pricing method | Exit EBITDA Multiple | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.086 | |
| Level 3 | Warrant | Discounted cash flows and Option-pricing method | Exit EBITDA Multiple | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.059 | |
| Level 3 | Warrant | Discounted cash flows and Option-pricing method | Discount for lack of marketability | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.150 | |
| Level 3 | Warrant | Discounted cash flows and Option-pricing method | Volatility | Minimum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.035 | |
| Level 3 | Warrant | Discounted cash flows and Option-pricing method | Volatility | Maximum | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.087 | |
| Level 3 | Warrant | Discounted cash flows and Option-pricing method | Volatility | Weighted average | ||
| FAIR VALUE MEASUREMENTS | ||
| Investments Owned, Measurement Input | 0.036 |
FAIR VALUE MEASUREMENTS - Borro
| FAIR VALUE MEASUREMENTS - Borrowings (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 06, 2021 | Nov. 24, 2021 | Dec. 04, 2020 | Oct. 20, 2020 | Jul. 13, 2018 |
| FAIR VALUE MEASUREMENTS | |||||||
| Principal Amount Outstanding | $ 445,145 | $ 481,637 | |||||
| Fair Value, Debt | $ 428,760 | $ 494,642 | |||||
| 6.000% 2023 Notes | |||||||
| FAIR VALUE MEASUREMENTS | |||||||
| Interest rate (as a percent) | 6% | 6% | 6% | 6% | |||
| 5.375% 2025 Notes | |||||||
| FAIR VALUE MEASUREMENTS | |||||||
| Interest rate (as a percent) | 5.375% | 5.375% | 5.375% | 5.375% | |||
| 5.375% 2026 Notes | |||||||
| FAIR VALUE MEASUREMENTS | |||||||
| Interest rate (as a percent) | 5.375% | 5.375% | 5.375% | 5.375% | |||
| 4.000% 2026 Notes | |||||||
| FAIR VALUE MEASUREMENTS | |||||||
| Interest rate (as a percent) | 4% | 4% | 4% | ||||
| 5.625% 2027 Notes | |||||||
| FAIR VALUE MEASUREMENTS | |||||||
| Interest rate (as a percent) | 5.625% | 5.625% | 5.625% | 5.625% | |||
| 4.250% 2028 Notes | |||||||
| FAIR VALUE MEASUREMENTS | |||||||
| Interest rate (as a percent) | 4.25% | 4.25% | 4.25% | 4.25% | |||
| Level 3 | JPM Credit Facility | |||||||
| FAIR VALUE MEASUREMENTS | |||||||
| Principal Amount Outstanding | $ 255,145 | $ 291,637 | |||||
| Fair Value, Debt | 252,799 | 302,147 | |||||
| Level 3 | 6.000% 2023 Notes | |||||||
| FAIR VALUE MEASUREMENTS | |||||||
| Principal Amount Outstanding | 30,000 | 30,000 | |||||
| Fair Value, Debt | 30,382 | 31,802 | |||||
| Level 3 | 5.375% 2025 Notes | |||||||
| FAIR VALUE MEASUREMENTS | |||||||
| Principal Amount Outstanding | 40,000 | 40,000 | |||||
| Fair Value, Debt | 37,474 | 40,687 | |||||
| Level 3 | 5.375% 2026 Notes | |||||||
| FAIR VALUE MEASUREMENTS | |||||||
| Principal Amount Outstanding | 10,000 | 10,000 | |||||
| Fair Value, Debt | 9,149 | 10,091 | |||||
| Level 3 | 4.000% 2026 Notes | |||||||
| FAIR VALUE MEASUREMENTS | |||||||
| Principal Amount Outstanding | 75,000 | 75,000 | |||||
| Fair Value, Debt | 67,912 | 74,957 | |||||
| Level 3 | 5.625% 2027 Notes | |||||||
| FAIR VALUE MEASUREMENTS | |||||||
| Principal Amount Outstanding | 10,000 | 10,000 | |||||
| Fair Value, Debt | 9,063 | 10,097 | |||||
| Level 3 | 4.250% 2028 Notes | |||||||
| FAIR VALUE MEASUREMENTS | |||||||
| Principal Amount Outstanding | 25,000 | 25,000 | |||||
| Fair Value, Debt | $ 21,981 | $ 24,861 |
BORROWINGS - Outstanding and Av
| BORROWINGS - Outstanding and Available (Details) - USD ($) $ in Thousands | 12 Months Ended | ||||||||||
| Feb. 04, 2022 | Jul. 15, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Mar. 30, 2022 | Mar. 29, 2022 | Dec. 06, 2021 | Nov. 24, 2021 | Dec. 04, 2020 | Oct. 20, 2020 | Jul. 13, 2018 | |
| Debt Instrument [Line Items] | |||||||||||
| Principal Amount Outstanding | $ 445,145 | $ 481,637 | |||||||||
| Amortized Cost, credit facility | 440,427 | 475,958 | |||||||||
| Available | 79,855 | 43,363 | |||||||||
| JPM Credit Facility | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Principal Amount Outstanding | 255,145 | 291,637 | |||||||||
| Amortized Cost, credit facility | 252,799 | 288,985 | |||||||||
| Available | $ 79,855 | $ 43,363 | $ 335,000 | $ 310,000 | |||||||
| Variable interest rate (as a percent) | 2.50% | 2.35% | |||||||||
| JPM Credit Facility | Libor | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Variable interest rate (as a percent) | 2.35% | 2.35% | |||||||||
| 6.000% 2023 Notes | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Principal Amount Outstanding | $ 30,000 | $ 30,000 | $ 30,000 | ||||||||
| Amortized Cost, credit facility | $ 29,893 | $ 29,717 | |||||||||
| Variable interest rate (as a percent) | 6% | 6% | |||||||||
| Interest rate (as a percent) | 6% | 6% | 6% | 6% | |||||||
| 5.375% 2025 Notes | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Principal Amount Outstanding | $ 40,000 | $ 40,000 | $ 40,000 | ||||||||
| Amortized Cost, credit facility | $ 39,629 | $ 39,497 | |||||||||
| Variable interest rate (as a percent) | 5.375% | 5.375% | |||||||||
| Interest rate (as a percent) | 5.375% | 5.375% | 5.375% | 5.375% | |||||||
| 5.375% 2026 Notes | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Principal Amount Outstanding | $ 10,000 | $ 10,000 | $ 10,000 | ||||||||
| Amortized Cost, credit facility | $ 9,885 | $ 9,856 | |||||||||
| Variable interest rate (as a percent) | 5.375% | 5.375% | |||||||||
| Interest rate (as a percent) | 5.375% | 5.375% | 5.375% | 5.375% | |||||||
| 4.000% 2026 Notes | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Principal Amount Outstanding | $ 75,000 | $ 75,000 | $ 75,000 | ||||||||
| Amortized Cost, credit facility | $ 73,652 | $ 73,404 | |||||||||
| Variable interest rate (as a percent) | 4% | 4% | |||||||||
| Interest rate (as a percent) | 4% | 4% | 4% | ||||||||
| 5.625% 2027 Notes | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Principal Amount Outstanding | $ 10,000 | $ 10,000 | $ 10,000 | ||||||||
| Amortized Cost, credit facility | $ 9,876 | $ 9,851 | |||||||||
| Variable interest rate (as a percent) | 5.625% | 5.625% | |||||||||
| Interest rate (as a percent) | 5.625% | 5.625% | 5.625% | 5.625% | |||||||
| 4.250% 2028 Notes | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Principal Amount Outstanding | $ 25,000 | $ 25,000 | $ 25,000 | ||||||||
| Amortized Cost, credit facility | $ 24,693 | $ 24,648 | |||||||||
| Variable interest rate (as a percent) | 4.25% | 4.25% | |||||||||
| Interest rate (as a percent) | 4.25% | 4.25% | 4.25% | 4.25% | |||||||
BORROWINGS - Narratives (Detail
| BORROWINGS - Narratives (Details) $ in Thousands | 12 Months Ended | |||||||||||
| Feb. 04, 2022 USD ($) | Jan. 04, 2022 USD ($) | Oct. 04, 2021 USD ($) | Jul. 15, 2021 | Dec. 21, 2020 USD ($) | Dec. 20, 2020 USD ($) | Jan. 01, 2018 | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Mar. 30, 2022 USD ($) | Mar. 29, 2022 USD ($) | Feb. 03, 2022 USD ($) | |
| Debt Instrument [Line Items] | ||||||||||||
| Percentage of asset coverage for borrowed amounts | 174.70% | 172.60% | ||||||||||
| Available | $ 79,855 | $ 43,363 | ||||||||||
| Principal Amount Outstanding | 445,145 | 481,637 | ||||||||||
| Principal Amount Outstanding | $ 445,145 | 481,637 | ||||||||||
| Minimum | ||||||||||||
| Debt Instrument [Line Items] | ||||||||||||
| Maximum debt-to-equity ratio | 1 | |||||||||||
| Debt outstanding for each dollar of equity | $ 1 | |||||||||||
| Value of equity for Each Dollar of Debt | $ 1 | |||||||||||
| Asset coverage ratio | 150% | |||||||||||
| Maximum | ||||||||||||
| Debt Instrument [Line Items] | ||||||||||||
| Maximum debt-to-equity ratio | 2 | |||||||||||
| Debt outstanding for each dollar of equity | $ 1 | |||||||||||
| Value of equity for Each Dollar of Debt | 2 | |||||||||||
| Asset coverage ratio | 200% | |||||||||||
| JPM Credit Facility | ||||||||||||
| Debt Instrument [Line Items] | ||||||||||||
| Increase in minimum funding of credit facility | $ 200 | $ 175 | ||||||||||
| Increase in credit facility size | $ 25,000 | 285,000 | $ 250,000 | |||||||||
| Maximum borrowing limit | $ 335,000 | $ 350,000 | 285,000 | |||||||||
| Variable interest rate (as a percent) | 2.50% | 2.35% | ||||||||||
| Available | $ 79,855 | 43,363 | $ 335,000 | $ 310,000 | ||||||||
| Permanent increase in availability | $ 25,000 | |||||||||||
| Temporary Increase in line of credit facility | 25,000 | $ 335,000 | $ 335,000 | |||||||||
| Commitment Fee (as a percent) | 0.75% | |||||||||||
| Minimum borrowing capacity | $ 234,500 | |||||||||||
| Minimum funding amount contingent | 217,000 | 234,500 | $ 217,000 | $ 200,000 | ||||||||
| Fair value of securities pledged as collateral | 624,123 | |||||||||||
| Principal Amount Outstanding | 255,145 | 291,637 | ||||||||||
| Amount undrawn under the credit facility | $ 310,000 | 79,855 | 43,363 | $ 285,000 | ||||||||
| Weighted average outstanding borrowings | $ 264,411 | $ 245,934 | ||||||||||
| Weighted average interest rate | 2.60% | |||||||||||
| Effective interest rate (as a percent) | 7.11% | 2.55% | ||||||||||
| Interest rate over time | 4.04% | |||||||||||
| JPM Credit Facility | Maximum | ||||||||||||
| Debt Instrument [Line Items] | ||||||||||||
| Maximum borrowing limit | $ 375,000 | |||||||||||
| JPM Credit Facility | LIBOR | ||||||||||||
| Debt Instrument [Line Items] | ||||||||||||
| Variable interest rate (as a percent) | 2.35% | |||||||||||
| JPM Credit Facility | SOFR | ||||||||||||
| Debt Instrument [Line Items] | ||||||||||||
| Variable interest rate (as a percent) | 2.50% | |||||||||||
BORROWINGS - Notes (Details)
| BORROWINGS - Notes (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 06, 2021 | Nov. 24, 2021 | Dec. 04, 2020 | Oct. 20, 2020 | Nov. 13, 2018 | Jul. 13, 2018 |
| Debt Instrument [Line Items] | ||||||||
| Principal Amount Outstanding | $ 445,145 | $ 481,637 | ||||||
| 6.000% 2023 Notes | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Principal Amount Outstanding | $ 30,000 | $ 30,000 | $ 30,000 | |||||
| Interest rate (as a percent) | 6% | 6% | 6% | 6% | ||||
| 6.000% 2023 Notes | Maximum | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Interest rate (as a percent) | 6.50% | |||||||
| 5.375% 2025 Notes | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Principal Amount Outstanding | $ 40,000 | $ 40,000 | $ 40,000 | |||||
| Interest rate (as a percent) | 5.375% | 5.375% | 5.375% | 5.375% | ||||
| 5.375% 2025 Notes | Maximum | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Interest rate (as a percent) | 6.375% | |||||||
| 5.375% 2026 Notes | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Principal Amount Outstanding | $ 10,000 | $ 10,000 | $ 10,000 | |||||
| Interest rate (as a percent) | 5.375% | 5.375% | 5.375% | 5.375% | ||||
| 5.375% 2026 Notes | Maximum | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Interest rate (as a percent) | 6.375% | |||||||
| 4.000% 2026 Notes | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Principal Amount Outstanding | $ 75,000 | $ 75,000 | $ 75,000 | |||||
| Interest rate (as a percent) | 4% | 4% | 4% | |||||
| 5.625% 2027 Notes | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Principal Amount Outstanding | $ 10,000 | $ 10,000 | $ 10,000 | |||||
| Interest rate (as a percent) | 5.625% | 5.625% | 5.625% | 5.625% | ||||
| 5.625% 2027 Notes | Maximum | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Interest rate (as a percent) | 6.625% | |||||||
| 4.250% 2028 Notes | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Principal Amount Outstanding | $ 25,000 | $ 25,000 | $ 25,000 | |||||
| Interest rate (as a percent) | 4.25% | 4.25% | 4.25% | 4.25% | ||||
| 4.250% 2028 Notes | Maximum | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Interest rate (as a percent) | 5.25% | |||||||
| 2025 Public Notes | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Principal Amount Outstanding | $ 35,000 | |||||||
| Interest rate (as a percent) | 6.50% |
RELATED PARTY TRANSACTIONS - (D
| RELATED PARTY TRANSACTIONS - (Details) - Investment Advisory Agreement | 12 Months Ended |
| Dec. 31, 2022 item | |
| Related Party Transaction [Line Items] | |
| Agreement may be terminated by either party without penalty upon days | 60 days |
| Percentage of base management fee on gross assets | 2% |
| Percentage of base management fee on gross assets if value exceeded total assets | 1.25% |
| Threshold percentage for calculation of base management fee | 200% |
| Number of calendar quarters | 2 |
RELATED PARTY TRANSACTIONS - Ba
| RELATED PARTY TRANSACTIONS - Base management fee (Details) - USD ($) $ in Thousands | 12 Months Ended | ||
| Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | |
| RELATED PARTY TRANSACTIONS | |||
| Base management fee | $ 15,600 | $ 13,975 | $ 12,464 |
| Total management fees | 15,600 | 13,975 | $ 12,464 |
| Management fees payable | $ 3,860 | $ 3,766 | |
RELATED PARTY TRANSACTIONS - Pe
| RELATED PARTY TRANSACTIONS - Performance-based incentive fee (Details) $ in Thousands | 12 Months Ended | ||
| Dec. 31, 2022 USD ($) component | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | |
| Related Party Transaction [Line Items] | |||
| Number of components | component | 2 | ||
| Incentive fee payables | $ 5,618 | $ 7,958 | |
| Total performance-based incentive fees | 7,059 | 7,524 | $ 7,619 |
| Income incentive fee | 8,862 | 7,263 | 6,114 |
| Capital gains incentive fee | (1,803) | 261 | 1,505 |
| Total performance-based incentive fees | 7,059 | 7,524 | $ 7,619 |
| Capital Gains Incentive Fees under GAAP | |||
| Related Party Transaction [Line Items] | |||
| Incentive fee payables | $ 0 | $ 1,803 | |
| Investment adviser | |||
| Related Party Transaction [Line Items] | |||
| Number of components | component | 2 | ||
| Incentive fee payables | $ 0 | ||
RELATED PARTY TRANSACTIONS - Ad
| RELATED PARTY TRANSACTIONS - Administration , Coinvestment and STRS JV (Details) - USD ($) $ in Thousands | 12 Months Ended | ||
| Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | |
| Related Party Transaction [Line Items] | |||
| Administrative service fees | $ 683 | $ 683 | $ 683 |
| Net realized gains (losses) | $ (13,958) | 8,556 | 4,118 |
| Administration Agreement | |||
| Related Party Transaction [Line Items] | |||
| Agreement may be terminated by either party without penalty upon days | 60 days | ||
| Administrative service fees | $ 683 | 683 | $ 683 |
| Administration Agreement | White Horse Advisers | |||
| Related Party Transaction [Line Items] | |||
| Affiliated funds invested | 4,415,678 | 4,502,807 | |
| Administration Agreement | STRS JV | |||
| Related Party Transaction [Line Items] | |||
| Proceeds from sale of investments | 108,549 | 140,904 | |
| Net realized gains (losses) | $ 64 | $ (73) | |
COMMITMENTS AND CONTINGENCIES -
| COMMITMENTS AND CONTINGENCIES - Unfunded commitments (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 |
| Unfunded commitments | ||
| Total Unfunded Commitments | $ 56,190 | $ 53,113 |
| Revolving Loan Commitments | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 15,593 | 25,053 |
| Revolving Loan Commitments | ABB/Con-cise Optical Group LLC (d/b/a ABB Optical Group, LLC) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 113 | |
| Revolving Loan Commitments | Bridgepoint Healthcare, LLC | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 1,588 | 1,588 |
| Revolving Loan Commitments | Camp Facility Services Holdings, LLC (d/b/a Camp Construction Services, Inc.) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 2,031 | |
| Revolving Loan Commitments | Claridge Products and Equipment, LLC | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 204 | 491 |
| Revolving Loan Commitments | Coastal Television Broadcasting Group LLC | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 309 | 309 |
| Revolving Loan Commitments | EducationDynamics, LLC | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 1,199 | 1,199 |
| Revolving Loan Commitments | Epiphany Business Services, LLC (d/b/a Epiphany Dermatology, PA) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 438 | |
| Revolving Loan Commitments | Gulf Winds International Acquisition, LLC (d/b/a Gulf Winds International, Inc.) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 647 | |
| Revolving Loan Commitments | I&I Sales Group, LLC (d/b/a Avision Sales Group) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 619 | |
| Revolving Loan Commitments | HC Salon Holdings, Inc. (d/b/a Hair Cuttery) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 700 | 700 |
| Revolving Loan Commitments | HRG Management, LLC (d/b/a HomeRiver Group, LLC) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 1,083 | |
| Revolving Loan Commitments | Industrial Specialty Services USA LLC | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 508 | 1,182 |
| Revolving Loan Commitments | Inspired Beauty Brands, Inc. | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 265 | 531 |
| Revolving Loan Commitments | ITS Buyer Inc. (d/b/a ITS Logistics, LLC) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 592 | |
| Revolving Loan Commitments | IvyRehab Intermediate II, LLC (d/b/a Ivy Rehab) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 403 | |
| Revolving Loan Commitments | Juniper Landscaping Holdings LLC | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 597 | |
| Revolving Loan Commitments | Leviathan Intermediate Holdco, LLC (d/b/a Unleashed Brands Group) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 494 | |
| Revolving Loan Commitments | LHS Borrower, LLC (d/b/a Leaf Home, LLC) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 560 | |
| Revolving Loan Commitments | LMG Holdings, Inc. | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 414 | |
| Revolving Loan Commitments | Motivational Marketing, LLC (d/b/a Motivational Fulfillment) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 1,024 | 1,182 |
| Revolving Loan Commitments | MSI Information Services, Inc. | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 1,050 | |
| Revolving Loan Commitments | Naviga Inc. (f/k/a Newscycle Solutions, Inc.) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 132 | |
| Revolving Loan Commitments | PFB Holdco, Inc. (d/b/a PFB Corporation) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 899 | 963 |
| Revolving Loan Commitments | PFB Holdco, Inc. (d/b/a PFB Corporation) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 296 | 296 |
| Revolving Loan Commitments | Power Service Group CR Acquisition Inc | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 2,299 | 3,030 |
| Revolving Loan Commitments | PG Dental New Jersey Parent, LLC | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 352 | 232 |
| Revolving Loan Commitments | RLJ Pro-Vac, Inc. (d/b/a Pro-Vac) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 1,013 | |
| Revolving Loan Commitments | Salon Republic Holdings, LLC (d/b/a Salon Republic, LLC) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 603 | |
| Revolving Loan Commitments | Sleep OpCo LLC (d/b/a Brooklyn Bedding LLC) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 2,646 | 2,646 |
| Revolving Loan Commitments | Telestream Holdings Corporation | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 397 | 795 |
| Revolving Loan Commitments | The Kyjen Company, LLC (d/b/a Outward Hound) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 554 | |
| Revolving Loan Commitments | Trimlite Buyer LLC (d/b/a Trimlite LLC) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 1,473 | |
| Delayed Draw Loan Commitments | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 40,597 | 28,060 |
| Delayed Draw Loan Commitments | Bridgepoint Healthcare, LLC | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 794 | 794 |
| Delayed Draw Loan Commitments | Camp Facility Services Holdings, LLC (d/b/a Camp Construction Services, Inc.) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 4,063 | 4,063 |
| Delayed Draw Loan Commitments | EducationDynamics, LLC | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 1,709 | 1,709 |
| Delayed Draw Loan Commitments | Empire Office, Inc. | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 4,926 | |
| Delayed Draw Loan Commitments | I&I Sales Group, LLC (d/b/a Avision Sales Group) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 2,699 | |
| Delayed Draw Loan Commitments | HRG Management, LLC (d/b/a HomeRiver Group, LLC) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 2,167 | 1,514 |
| Delayed Draw Loan Commitments | Grupo HIMA San Pablo, Inc. | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 667 | |
| Delayed Draw Loan Commitments | IvyRehab Intermediate II, LLC (d/b/a Ivy Rehab) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 1,188 | |
| Delayed Draw Loan Commitments | Juniper Landscaping Holdings LLC | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 2,387 | |
| Delayed Draw Loan Commitments | JZ Capital Partners Ltd. | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 5,714 | |
| Delayed Draw Loan Commitments | PlayMonster LLC | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 2,867 | |
| Delayed Draw Loan Commitments | Power Service Group CR Acquisition Inc. (d/b/a Power Plant Services) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 2,090 | |
| Delayed Draw Loan Commitments | Solar Holdings Bidco Limited | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 4,008 | |
| Delayed Draw Loan Commitments | Salon Republic Holdings, LLC (d/b/a Salon Republic, LLC) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 2,097 | |
| Delayed Draw Loan Commitments | Source Code Holdings, LLC (d/b/a Source Code Corporation) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 2,185 | |
| Delayed Draw Loan Commitments | StoicLane MidCo, LLC (d/b/a StoicLane Inc.) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 8,217 | |
| Delayed Draw Loan Commitments | Telestream Holdings Corporation | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 346 | |
| Delayed Draw Loan Commitments | True Blue Car Wash, LLC | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 59 | 1,145 |
| Delayed Draw Loan Commitments | US Methanol Midco LLC (d/b/a US Methanol LLC) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | $ 9,333 | |
| Delayed Draw Loan Commitments | BBQ Buyer, LLC (d/b/a BBQ Guys) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | 854 | |
| Delayed Draw Loan Commitments | DCA Investment Holding, LLC (d/b/a Dental Care Alliance, LLC) | ||
| Unfunded commitments | ||
| Total Unfunded Commitments | $ 1,062 |
COMMITMENTS AND CONTINGENCIES_2
| COMMITMENTS AND CONTINGENCIES - Additional information (Details) - STRS JV - USD ($) $ in Thousands | 12 Months Ended | |
| Dec. 31, 2022 | Dec. 31, 2021 | |
| Unfunded commitments | ||
| Commitments to fund equity interests | $ 20,000 | $ 15,000 |
| Commitments to subordinated notes | $ 80,000 | $ 60,000 |
STOCKHOLDERS' EQUITY - Addition
| STOCKHOLDERS' EQUITY - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended | |||||||
| Nov. 03, 2021 | Oct. 25, 2021 | Mar. 15, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | |
| Subsidiary, Sale of Stock [Line Items] | ||||||||
| Shares sold in the program | 2,182,300 | |||||||
| Gross proceeds from common stock | $ 1,225 | $ 41,285 | ||||||
| Net proceeds of commissions to sales agent | $ 125 | $ 37,486 | ||||||
| Offering price | $ 13.05 | $ 15.50 | $ 13.61 | $ 13.70 | $ 12.72 | |||
| ATM Program | ||||||||
| Subsidiary, Sale of Stock [Line Items] | ||||||||
| Aggregate offering amount | $ 125 | $ 3,905 | ||||||
| Shares sold in the program | 276,300 | |||||||
| Weighted-average price | $ 15.77 | |||||||
| Gross proceeds from common stock | $ 4,359 | |||||||
| Net proceeds of commissions to sales agent | 4,272 | |||||||
| Shares available under the program | $ 30,641 | $ 30,893 | ||||||
| ATM Program | Raymond James & Associates, Inc. | Maximum | ||||||||
| Subsidiary, Sale of Stock [Line Items] | ||||||||
| Aggregate offering amount | $ 35,000 | |||||||
| Overallotment option | ||||||||
| Subsidiary, Sale of Stock [Line Items] | ||||||||
| Shares sold in the program | 282,300 | 285,000 | ||||||
| Gross proceeds from common stock | $ 4,326 | |||||||
| Net proceeds of commissions to sales agent | $ 33,700 | |||||||
| Public offering | ||||||||
| Subsidiary, Sale of Stock [Line Items] | ||||||||
| Shares sold in the program | 1,900,000 | |||||||
| Net proceeds of commissions to sales agent | $ 29,374 | |||||||
| Offering price | $ 15.81 | |||||||
STOCKHOLDERS' EQUITY - Schedule
| STOCKHOLDERS' EQUITY - Schedule of Stockholder's Equity (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended | ||
| Mar. 15, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | |
| Subsidiary, Sale of Stock [Line Items] | |||
| Total Shares Issued | 80,421 | 2,616,635 | |
| Gross proceeds from common stock | $ 1,225 | $ 41,285 | |
| Average Price Per Share | $ 15.23 | $ 15.78 | |
| Average price per share, inclusive offering expenses | $ 13.72 | $ 15.35 | |
| Equity Offering | |||
| Subsidiary, Sale of Stock [Line Items] | |||
| Total Shares Issued | 2,182,300 | ||
| ATM Program | |||
| Subsidiary, Sale of Stock [Line Items] | |||
| Total Shares Issued | 16,678 | 259,682 | |
| Gross proceeds from common stock | $ 4,359 | ||
| DRIP | |||
| Subsidiary, Sale of Stock [Line Items] | |||
| Total Shares Issued | 63,743 | 174,653 | |
FINANCIAL HIGHLIGHTS (Details)
| FINANCIAL HIGHLIGHTS (Details) - USD ($) | 12 Months Ended | ||||
| Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | |
| Per share data: | |||||
| Net asset value, beginning of period | $ 15.10 | $ 15.23 | $ 15.23 | $ 15.35 | $ 13.98 |
| Investment operations: | |||||
| Net investment income | 1.60 | 1.36 | 1.18 | 1.52 | 1.22 |
| Net realized and unrealized gains(losses) on investments and foreign currency transactions | (0.93) | 0.07 | 0.37 | (0.02) | 1.57 |
| Net increase in net assets resulting from operations | 0.67 | 1.43 | 1.55 | 1.50 | 2.79 |
| Distributions declared from net investment income | (1.47) | (1.56) | (1.55) | (1.62) | (1.42) |
| Net asset value, end of period | $ 14.30 | $ 15.10 | $ 15.23 | $ 15.23 | $ 15.35 |
| Total annualized return based on market value | (15.81%) | 13.89% | (0.66%) | 9.72% | (5.22%) |
| Total annualized return based on net asset value | 4.55% | 9.21% | 10.36% | 7.70% | 18.66% |
| Net assets, end of period | $ 332,387 | $ 349,751 | $ 312,897 | $ 312,955 | $ 315,296 |
| Per share market value at end of period | $ 13.05 | $ 15.50 | $ 13.61 | $ 13.70 | $ 12.72 |
| Shares outstanding end of period | 23,243,088 | 23,162,667 | 20,546,032 | 20,546,032 | 20,546,032 |
| Ratios/Supplemental Data: | |||||
| Ratio of expenses before incentive fees to average net assets | 12.54% | 10.96% | 9.78% | 8.88% | 8.50% |
| Ratio of incentive fees to average net assets | 2.04% | 2.30% | 2.49% | 2.43% | 3.95% |
| Ratio of total expenses to average net assets | 14.58% | 13.26% | 12.27% | 11.31% | 12.45% |
| Ratio of net investment income to average net assets | 10.81% | 8.81% | 7.90% | 9.83% | 8.14% |
| Portfolio turnover ratio | 35.81% | 60.79% | 35.86% | 48.15% | 57.74% |
CHANGE IN NET ASSETS RESULTIN_3
| CHANGE IN NET ASSETS RESULTING FROM OPERATIONS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended | ||
| Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | |
| CHANGE IN NET ASSETS RESULTING FROM OPERATIONS PER COMMON SHARE | |||
| Net increase in net assets resulting from operations | $ 15,683 | $ 30,094 | $ 31,685 |
| Weighted average shares outstanding, basic | 23,229,552 | 21,150,168 | 20,546,032 |
| Weighted average shares outstanding, diluted | 23,229,552 | 21,150,168 | 20,546,032 |
| Basic per share net increase in net assets resulting from operations | $ 0.68 | $ 1.42 | $ 1.55 |
| Diluted per share net increase in net assets resulting from operations | $ 0.68 | $ 1.42 | $ 1.55 |
INCOME TAXES (Details)
| INCOME TAXES (Details) - USD ($) $ in Thousands | 12 Months Ended | ||
| Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | |
| INCOME TAXES | |||
| Provision for federal income tax | $ 0 | ||
| Percentage of taxable income distributed | 100% | ||
| Late year ordinary losses | $ 0 | $ 0 | $ 0 |
| Long-term capital loss carryforwards | 9,333 | 0 | |
| Short-term capital loss carryforwards | 0 | 0 | |
| Cost of investments for U.S. federal income tax purpose | 784,812 | 835,502 | |
| Net unrealized depreciation | 24,584 | 16,293 | |
| Gross unrealized appreciation of investments | 7,881 | 10,769 | |
| Gross unrealized depreciation of investments | $ 32,465 | $ 27,062 | |
INCOME TAXES - Reconciliation (
| INCOME TAXES - Reconciliation (Details) - USD ($) $ in Thousands | 12 Months Ended | ||
| Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | |
| INCOME TAXES | |||
| Net increase in net assets resulting from operations | $ 15,683 | $ 30,094 | $ 31,685 |
| Change in net unrealized (appreciation) depreciation on investments and foreign currency | 7,307 | 7,512 | (3,365) |
| Other book-to-tax differences | 9,498 | 451 | 3,140 |
| Taxable income before deductions for distributions | $ 32,488 | $ 38,057 | $ 31,460 |
INCOME TAXES - Distribution (De
| INCOME TAXES - Distribution (Details) - USD ($) $ in Thousands | 12 Months Ended | |||
| Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | |
| Amount | ||||
| Ordinary income | $ 34,150 | $ 31,953 | $ 26,420 | |
| Long-term capital gains | 1,452 | 5,323 | ||
| Total distributions | $ 34,150 | $ 33,405 | $ 31,743 | $ 31,743 |
| Percentage | ||||
| Ordinary income (as a percent) | 100% | 95.70% | 83.20% | |
| Long-term capital gains (as a percent) | 4.30% | 16.80% | ||
| Total distributions (as a percent) | 100% | 100% | 100% | |
INCOME TAXES - Tax basis compon
| INCOME TAXES - Tax basis components of distributable earnings (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 |
| INCOME TAXES | |||
| Ordinary income | $ 24,217 | $ 29,500 | $ 24,100 |
| Net unrealized (depreciation) appreciation on investments and foreign currency | (22,287) | (15,910) | (11,226) |
| Total (accumulated deficit) distributable earnings - tax basis | $ 1,930 | $ 13,590 | $ 12,874 |
SUBSEQUENT EVENTS - (Details)
| SUBSEQUENT EVENTS - (Details) - STRS JV - USD ($) $ in Thousands | Feb. 28, 2023 | Dec. 31, 2022 | Feb. 28, 2022 | Dec. 31, 2021 | Jan. 14, 2019 |
| Subsequent Event [Line Items] | |||||
| Increase in investment commitment in joint venture | $ 25,000 | ||||
| Investment commitment in joint venture | $ 100,000 | $ 75,000 | |||
| Economic ownership (as a percent) | 66.67% | 66.67% | 60% | ||
| STRS Ohio | |||||
| Subsequent Event [Line Items] | |||||
| Investment commitment in joint venture | $ 50,000 | ||||
| Economic ownership (as a percent) | 33.33% | 33.33% | 40% | ||
| Subordinated Notes | |||||
| Subsequent Event [Line Items] | |||||
| Investment commitment in joint venture | $ 80,000 | ||||
| Equity (excluding STRS JV) | |||||
| Subsequent Event [Line Items] | |||||
| Investment commitment in joint venture | $ 20,000 | ||||
| Subsequent Event | |||||
| Subsequent Event [Line Items] | |||||
| Increase in investment commitment in joint venture | $ 15,000 | ||||
| Investment commitment in joint venture | $ 115,000 | ||||
| Economic ownership (as a percent) | 65.71% | ||||
| Subsequent Event | STRS Ohio | |||||
| Subsequent Event [Line Items] | |||||
| Increase in investment commitment in joint venture | $ 10,000 | ||||
| Investment commitment in joint venture | $ 60,000 | ||||
| Economic ownership (as a percent) | 34.29% | ||||
| Subsequent Event | Subordinated Notes | |||||
| Subsequent Event [Line Items] | |||||
| Investment commitment in joint venture | $ 92,000 | ||||
| Subsequent Event | Subordinated Notes | STRS Ohio | |||||
| Subsequent Event [Line Items] | |||||
| Investment commitment in joint venture | 48,000 | ||||
| Subsequent Event | Equity (excluding STRS JV) | |||||
| Subsequent Event [Line Items] | |||||
| Investment commitment in joint venture | 23,000 | ||||
| Subsequent Event | Equity (excluding STRS JV) | STRS Ohio | |||||
| Subsequent Event [Line Items] | |||||
| Investment commitment in joint venture | $ 12,000 |