WhiteHorse Finance (WHF) 10-Q 8 Aug 24 2024 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2024	Aug. 02, 2024
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2024
Document Fiscal Year Focus	2024
Current Fiscal Year End Date	--12-31
Securities Act 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
Entity Address, Address Line Two	31st Floor
Entity Address, City or Town	Miami
Entity Address, Postal Zip Code	33131
City Area Code	305
Local Phone Number	381-6999
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
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		23,243,088
Entity Central Index Key	0001552198
Document Fiscal Period Focus	Q2
Amendment Flag	false
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	WHF
Security Exchange Name	NASDAQ
7.875% 2028 Notes
Document Information [Line Items]
Title of 12(b) Security	7.875% Notes due 2028
Trading Symbol	WHFCL
Security Exchange Name	NASDAQ

Consolidated Statements of Asse

Consolidated Statements of Assets and Liabilities - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Assets
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 660,005	$ 696,168
Cash and cash equivalents	12,853	10,749
Restricted cash and cash equivalents	8,436	12,527
Restricted foreign currency (cost of $486 and $1,231, respectively)	467	1,211
Interest and dividend receivable	7,792	8,149
Amounts receivable on unsettled investment transactions	12,630	343
Escrow receivable		393
Prepaid expenses and other receivables	1,000	1,211
Total assets	703,183	730,751
Liabilities
Debt (net of unamortized debt issuance costs of $3,720 and $4,564, respectively)	358,896	386,448
Distributions payable	8,949	8,949
Management fees payable	3,065	3,595
Incentive fees payable	14,630	10,470
Interest payable	1,910	2,069
Accounts payable and accrued expenses	2,656	2,089
Advances received from unfunded credit facilities	388	316
Unrealized depreciation on foreign currency forward contracts	7	43
Total liabilities	390,501	413,979
Commitments and contingencies (See Note 8)
Net assets
Common stock, 23,243,088 and 23,243,088 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	338,275	338,275
Accumulated earnings (losses)	(25,616)	(21,526)
Total net assets	312,682	316,772
Total liabilities and total net assets	$ 703,183	$ 730,751
Number of shares outstanding	23,243,088	23,243,088
Net asset value per share	$ 13.45	$ 13.63
Non-controlled/non-affiliate company investments
Assets
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 525,821	$ 577,798
Non-controlled affiliate company investments
Assets
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	17,024	5,422
Controlled affiliate company investments
Assets
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 117,160	$ 112,948

Consolidated Statements of As_2

Consolidated Statements of Assets and Liabilities (Parenthetical) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Consolidated Statements of Assets and Liabilities
Investments, amortized cost	$ 704,521	$ 740,021
Restricted foreign currency, cost	486	1,231
Unamortized debt issuance costs	$ 3,720	$ 4,564
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	23,243,088	23,243,088
Common stock, share outstanding	23,243,088	23,243,088

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Investment income
Total investment income	$ 23,482	$ 25,595	$ 48,957	$ 51,759
Expenses
Interest expense	7,144	7,334	14,474	14,859
Base management fees	3,065	3,705	6,182	7,416
Performance-based incentive fees	2,323	2,648	5,026	5,324
Administrative service fees	170	170	341	341
General and administrative expenses	1,221	896	2,268	2,023
Total expenses	13,923	14,753	28,291	29,963
Net investment income before excise tax	9,559	10,842	20,666	21,796
Excise tax	267	250	559	500
Net investment income after excise tax	9,292	10,592	20,107	21,296
Realized and unrealized gains (losses) on investments and foreign currency transactions
Net realized gains (losses)			(5,728)	(3)
Foreign currency transactions	(8)	41	1	402
Foreign currency forward contracts	28	4		(3)
Net realized gains (losses)	(93)	(289)	(5,727)	396
Net change in unrealized appreciation (depreciation)			(1,056)	(9,470)
Translation of assets and liabilities in foreign currencies	146	(458)	448	(829)
Foreign currency forward contracts	(16)	(12)	36	(6)
Net change in unrealized appreciation (depreciation)	(1,360)	(6,422)	(572)	(10,305)
Net realized and unrealized gains (losses) on investments and foreign currency transactions	(1,453)	(6,711)	(6,299)	(9,909)
Net increase in net assets resulting from operations	$ 7,839	$ 3,881	$ 13,808	$ 11,387
Per Common Share Data
Basic earnings per common share	$ 0.34	$ 0.17	$ 0.59	$ 0.49
Diluted earnings per common share	0.34	0.17	0.59	0.49
Dividends and distributions declared per common share	$ 0.39	$ 0.37	$ 0.77	$ 0.80
Basic weighted average common shares outstanding	23,243,088	23,243,088	23,243,088	23,243,088
Diluted weighted average common shares outstanding	23,243,088	23,243,088	23,243,088	23,243,088
Non-controlled/non-affiliate company investments
Investment income
Interest income	$ 17,264	$ 19,307	$ 35,225	$ 38,928
Payment-in-kind income	1,493	1,073	3,282	2,305
Fee income	426	920	1,074	1,953
Dividend income	36	17	54	32
Realized and unrealized gains (losses) on investments and foreign currency transactions
Net realized gains (losses)	(113)	5	(5,728)	336
Net change in unrealized appreciation (depreciation)	(2,373)	(2,330)	8,340	(4,427)
Non-controlled affiliate company investments
Investment income
Interest income	10		34
Payment-in-kind income	177		334
Paid in-kind income		115		66
Dividend income				84
Realized and unrealized gains (losses) on investments and foreign currency transactions
Net realized gains (losses)		(339)		(339)
Net change in unrealized appreciation (depreciation)	58	(3,022)	(9,952)	(4,522)
Controlled affiliate company investments
Investment income
Interest income	2,496	2,328	4,992	4,538
Payment-in-kind income	164	496	250	908
Dividend income	1,416	1,339	3,712	2,945
Realized and unrealized gains (losses) on investments and foreign currency transactions
Net change in unrealized appreciation (depreciation)	$ 825	$ (600)	$ 556	$ (521)

Consolidated Statements of Chan

Consolidated Statements of Changes in Net Assets (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023
Increase (Decrease) in Stockholders' Equity
Beginning Balance	$ 313,792	$ 316,772	$ 330,015	$ 332,387
Beginning Balance (in shares)		23,243,088
Net increase in net assets resulting from operations:
Net investment income after excise tax	9,292	$ 10,815	10,592	10,704
Net realized gains (losses) on investments and foreign currency transactions	(93)	(5,634)	(289)	685
Net change in unrealized appreciation (depreciation) on investments and foreign currency transactions	(1,360)	788	(6,422)	(3,883)
Distributions declared	(8,949)	(8,949)	(8,600)	(9,878)
Ending Balance	$ 312,682	313,792	325,296	330,015
Ending Balance (in shares)	23,243,088
Common Stock
Increase (Decrease) in Stockholders' Equity
Beginning Balance	$ 23	$ 23	$ 23	$ 23
Beginning Balance (in shares)	23,243,088	23,243,088	23,243,088	23,243,088
Net increase in net assets resulting from operations:
Ending Balance	$ 23	$ 23	$ 23	$ 23
Ending Balance (in shares)	23,243,088	23,243,088	23,243,088	23,243,088
Paid-in Capital in Excess of Par
Increase (Decrease) in Stockholders' Equity
Beginning Balance	$ 338,275	$ 338,275	$ 339,240	$ 339,240
Net increase in net assets resulting from operations:
Ending Balance	338,275	338,275	339,240	339,240
Accumulated Earnings (Losses)
Increase (Decrease) in Stockholders' Equity
Beginning Balance	(24,506)	(21,526)	(9,248)	(6,876)
Net increase in net assets resulting from operations:
Net investment income after excise tax	9,292	10,815	10,592	10,704
Net realized gains (losses) on investments and foreign currency transactions	(93)	(5,634)	(289)	685
Net change in unrealized appreciation (depreciation) on investments and foreign currency transactions	(1,360)	788	(6,422)	(3,883)
Distributions declared	(8,949)	(8,949)	(8,600)	(9,878)
Ending Balance	$ (25,616)	$ (24,506)	$ (13,967)	$ (9,248)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities
Net increase in net assets resulting from operations	$ 13,808	$ 11,387
Adjustments to reconcile net increase in net assets resulting from operations to net cash provided by / (used in) operating activities:
Payment-in-kind income	(3,866)	(3,668)
Net realized (gains) losses on investments	5,728	3
Net unrealized (appreciation) depreciation on investments	1,056	9,470
Net unrealized (appreciation) depreciation on translation of assets and liabilities in foreign currencies	(448)	829
Net unrealized (appreciation) depreciation on foreign currency forward contracts	(36)	6
Accretion of discount	(1,901)	(2,070)
Amortization of deferred financing costs	844	782
Acquisition of investments	(116,442)	(65,257)
Proceeds from principal payments and sales of portfolio investments	121,515	56,765
Proceeds from sales of portfolio investments to STRS JV	30,466	36,633
Net changes in operating assets and liabilities:
Interest and dividend receivable	357	594
Prepaid expenses and other receivables	211	135
Amounts receivable on unsettled investment transactions	(12,287)	(11,487)
Management fees payable	(530)	(155)
Incentive fees payable	4,160	(503)
Accounts payable and accrued expenses	567	(859)
Interest payable	(159)	(24)
Advances received from unfunded credit facilities	72	(301)
Net cash provided by / (used in) operating activities	43,115	32,280
Cash flows from financing activities
Borrowings	58,452	45,558
Repayments of debt	(86,400)	(62,902)
Deferred financing costs		(2)
Distributions paid to common stockholders, net of distributions reinvested	(17,898)	(18,129)
Net cash provided by / (used in) financing activities	(45,846)	(35,475)
Effect of exchange rate changes on cash		16
Net change in cash, cash equivalents and restricted cash	(2,731)	(3,179)
Cash, cash equivalents and restricted cash at beginning of period	24,487	26,264
Cash, cash equivalents and restricted cash at end of period	21,756	23,085
Supplemental and non-cash disclosure of cash flow information:
Interest paid	$ 13,789	14,101
Non-cash exchanges of investments		$ 1,840

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Unaudited) - Total cash, cash equivalents and restricted cash - USD ($) $ in Thousands	Jun. 30, 2024	Jun. 30, 2023
Reconciliation of cash, cash equivalents
Cash and cash equivalents	$ 12,853	$ 10,412
Restricted cash and cash equivalents	8,436	10,624
Restricted foreign currency	467	2,049
Total cash and cash equivalents, restricted cash and cash equivalents and restricted foreign currency presented in consolidated statements of cash flows	$ 21,756	$ 23,085

Consolidated Schedule of Invest

Consolidated Schedule of Investments $ in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($) shares	Jun. 30, 2024 CAD ($)	Dec. 31, 2022 USD ($)
Schedule of Investments [Line Items]
Investments, amortized cost	$ 704,521	$ 740,021
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 660,005	$ 696,168
Percent of net assets	211.10%	219.70%	211.10%
Total investments and money market funds amortized cost	$ 718,850
Total investments and money market funds fair value	$ 674,334
Total investments and money market funds percentage	215.70%		215.70%
Qualifying Assets Required Of Acquiree At Time Of Acquisition Of Total Assets	70%	70%
Qualifying Assets Of Acquired Of Total Assets	81.30%	83.30%
Investments Of Net Assets	211.10%	219.70%
Investment Of Total Assets	93.90%	95.30%
Unrealized depreciation	$ (7)	$ (43)
Morgan Stanley
Schedule of Investments [Line Items]
Unrealized depreciation	$ (7)	$ (43)
Morgan Stanley | CAD
Schedule of Investments [Line Items]
Currency to be sold	1,619	1,253
Morgan Stanley | USD
Schedule of Investments [Line Items]
Currency to be purchased	1,177	903
Advertising
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 11,974	$ 12,009
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 12,099	12,040
Air Freight & Logistics
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 3,297	3,503
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 3,323	3,504
Broadline Retail
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 18,737	18,798
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 18,759	18,759
Building Products
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 13,498	13,541
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 13,449	13,313
Construction & Engineering
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 15,276	9,476
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 15,452	9,550
Data Processing & Outsourced Services
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 14,431	14,969
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	13,656	14,659
Distributors
Schedule of Investments [Line Items]
Investments, amortized cost	4,122
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 4,123
Diversified Support Services
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 19,176	19,246
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 19,273	19,136
Drug Retail
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 4,910	4,922
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 5,089	5,022
Electronic Equipment & Instruments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 13,162	13,203
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 13,267	13,269
Environmental & Facilities Services
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 36,026	26,906
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	36,616	27,278
Food Distributors
Schedule of Investments [Line Items]
Investments, amortized cost	4,933
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 4,934
Health Care Supplies
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 7,492	7,500
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 7,626	7,530
Household Appliances
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 7,639	7,808
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 7,857	8,168
Industrial Machinery & Supplies & Components
Schedule of Investments [Line Items]
Investments, amortized cost		6,498
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		6,561
Investment Banking & Brokerage
Schedule of Investments [Line Items]
Investments, amortized cost		4,958
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		4,977
IT Consulting And Other Services
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 51,525	50,974
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 51,762	51,295
Packaged Foods & Meats
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 11,180	6,904
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 11,202	6,904
Personal Products
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 5,810	5,944
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 5,843	5,957
Paper Packaging
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 6,876	6,485
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 6,621	6,471
Real Estate Operating Companies
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 6,908	12,406
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 6,743	11,903
Research & Consulting Services
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 11,962	8,541
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 12,044	8,562
Technology Hardware, Storage & Peripherals
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 17,945	18,811
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 18,061	$ 18,853
Debt Investments
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]		Non-controlled/non-affiliate company investments
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 638,111	$ 693,621
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 613,622	$ 656,707
Percent of net assets	196.30%	207.40%	196.30%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 13,663	$ 4,602
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 13,893	$ 4,579
Percent of net assets	4.50%	1.40%	4.50%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 28,677	$ 23,689
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 27,841	$ 22,616
Percent of net assets	9%	7.20%	9%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 12,480	$ 12,357
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 13,621	$ 13,191
Percent of net assets	4.40%	4.20%	4.40%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 36,642	$ 39,567
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 32,378	$ 34,202
Percent of net assets	10.30%	11%	10.30%
Debt Investments | Automotive Retail
Schedule of Investments [Line Items]
Investments, amortized cost		$ 12,391
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 12,407
Percent of net assets		3.90%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 8,348	$ 7,329
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 8,338	$ 7,243
Percent of net assets	2.70%	2.30%	2.70%
Debt Investments | Broadline Retail
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 19,981	$ 34,393
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 20,101	$ 34,510
Percent of net assets	6.50%	11%	6.50%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 14,988	$ 15,472
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 13,871	$ 14,810
Percent of net assets	4.40%	4.70%	4.40%
Debt Investments | Cable & Satellite
Schedule of Investments [Line Items]
Investments, amortized cost		$ 21,226
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 20,969
Percent of net assets		6.60%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 29,664	$ 30,242
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 30,239	$ 30,712
Percent of net assets	9.80%	9.70%	9.80%
Debt Investments | Communications Equipment
Schedule of Investments [Line Items]
Investments, amortized cost	$ 8,625
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 8,625
Percent of net assets	2.90%		2.90%
Debt Investments | Construction & Engineering
Schedule of Investments [Line Items]
Investments, amortized cost	$ 589	$ 137
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 589	137
Percent of net assets	0.20%		0.20%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 7,135	8,023
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 6,306	$ 6,901
Percent of net assets	2%	2.20%	2%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 29,449	$ 21,582
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 29,541	$ 21,480
Percent of net assets	9.40%	6.80%	9.40%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 11,768	$ 15,946
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 11,845	$ 12,475
Percent of net assets	3.80%	3.90%	3.80%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 4,280	$ 10,549
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 4,057	$ 10,008
Percent of net assets	1.30%	3.20%	1.30%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 9,221	$ 9,354
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 9,270	$ 9,293
Percent of net assets	3%	2.90%	3%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 12,552	$ 12,814
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 11,885	$ 12,552
Percent of net assets	3.80%	4.10%	3.80%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 15,759	$ 15,715
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 16,083	$ 15,954
Percent of net assets	5.10%	5%	5.10%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 21,806	$ 22,984
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 22,021	$ 22,895
Percent of net assets	7%	7.20%	7%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 8,951	$ 8,973
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 8,867	$ 8,966
Percent of net assets	2.90%	2.80%	2.90%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 10,482	$ 17,577
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 10,484	$ 17,643
Percent of net assets	3.30%	5.50%	3.30%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 20,099	$ 20,056
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 18,768	$ 18,983
Percent of net assets	6%	6%	6%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 9,989	$ 10,048
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 10,179	$ 10,135
Percent of net assets	3.20%	3.20%	3.20%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 27,889	$ 27,965
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 27,653	$ 27,508
Percent of net assets	8.80%	8.60%	8.80%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 11,299	$ 6,695
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 10,870	$ 5,966
Percent of net assets	3.50%	1.90%	3.50%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 6,702	$ 11,282
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 5,402	$ 10,873
Percent of net assets	1.70%	3.40%	1.70%
Debt Investments | Industrial Machinery & Supplies & Components
Schedule of Investments [Line Items]
Investments, amortized cost		$ 5,536
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 5,364
Percent of net assets		1.70%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 21,913	$ 8,063
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 21,013	$ 7,748
Percent of net assets	6.70%	2.40%	6.70%
Debt Investments | Investment Banking & Brokerage
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		Honors Holdings, LLC [Member]
Investments, amortized cost		$ 3,521
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 3,522
Percent of net assets		1.10%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 3,725	$ 3,741
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 3,693	$ 3,745
Percent of net assets	1.20%	1.20%	1.20%
Debt Investments | Leisure Facilities
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	us-gaap:InvestmentAffiliatedIssuerMember	Non-controlled/non-affiliate company investments	us-gaap:InvestmentAffiliatedIssuerMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 26,534	$ 22,593
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 23,946	$ 22,436
Percent of net assets	7.70%	7.10%	7.70%
Debt Investments | Leisure Products
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	us-gaap:InvestmentAffiliatedIssuerMember	Non-controlled/non-affiliate company investments	us-gaap:InvestmentAffiliatedIssuerMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 17,865	$ 14,877
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 15,502	$ 12,738
Percent of net assets	4.90%	4%	4.90%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 4,949	$ 4,944
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 5,002	$ 4,901
Percent of net assets	1.60%	1.50%	1.60%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 20,843	$ 32,662
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 9,441	$ 21,253
Percent of net assets	2.90%	6.70%	2.90%
Debt Investments | Packaged Foods & Meats
Schedule of Investments [Line Items]
Investments, amortized cost	$ 4,009
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 4,009
Percent of net assets	1.30%		1.30%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 5,880	$ 5,975
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 6,088	$ 6,080
Percent of net assets	1.90%	1.90%	1.90%
Debt Investments | Real Estate Services
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investments, amortized cost	$ 10,000
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 10,083
Percent of net assets	3.20%		3.20%
Debt Investments | Real Estate Development
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]		Non-controlled/non-affiliate company investments
Investments, amortized cost		$ 9,984
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 10,239
Percent of net assets		3.30%
Debt Investments | Research & Consulting Services
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]		Non-controlled/non-affiliate company investments
Investments, amortized cost		$ 16,119
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 16,081
Percent of net assets		5.10%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 22,113	$ 22,796
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 22,251	$ 22,908
Percent of net assets	7.10%	7.20%	7.10%
Debt Investments | Security & Alarm Services
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 6,840
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 6,930
Percent of net assets	2.20%		2.20%
Debt Investments | Specialized Finance
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Controlled affiliate company investments	Non-controlled/non-affiliate company investments	Controlled affiliate company investments
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 84,416	$ 84,416
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 84,416	$ 84,416
Percent of net assets	27%	26.60%	27%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 1,726	$ 20,618
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 2,402	$ 11,523
Percent of net assets	0.80%	3.60%	0.80%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 18,206	$ 16,808
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 18,065	$ 16,745
Percent of net assets	5.70%	5.30%	5.70%
Subordinated Debt [Member]
Schedule of Investments [Line Items]
Investments, amortized cost	$ 1,264	$ 167
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,261	167
Equity Investments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 66,410	46,400
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 46,383	$ 39,461
Percent of net assets	14.80%	12.30%	14.80%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 620	$ 620
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 839	$ 706
Percent of net assets	0.30%	0.20%	0.30%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 1,250	$ 1,250
Equity Investments | Broadline 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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 1,614	$ 1,614
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,767	$ 2,162
Percent of net assets	0.60%	0.70%	0.60%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 423	$ 423
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,034	$ 1,053
Percent of net assets	0.30%	0.30%	0.30%
Equity Investments | Construction & Engineering
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]		Non-controlled/non-affiliate company investments
Investments, amortized cost	$ 404	$ 404
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 404	$ 404
Percent of net assets	0.10%	0.10%	0.10%
Equity Investments | Diversified Chemicals
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments	Non-controlled/non-affiliate company investments	Non-controlled affiliate company investments
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 4,537	$ 4,537
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 178	$ 251
Percent of net assets	0.10%	0.10%	0.10%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 375	$ 367
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 153	$ 314
Percent of net assets		0.10%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 167	$ 167
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1	$ 18
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 942	$ 825
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,400	$ 983
Percent of net assets	0.40%	0.30%	0.40%
Equity Investments | Food Distributors
Schedule of Investments [Line Items]
Investments, amortized cost	$ 317
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 317
Percent of net assets	0.10%		0.10%
Equity Investments | Industrial Machinery & Supplies & Components
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	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
Investments, amortized cost	$ 788	$ 788
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,253	$ 1,053
Percent of net assets	0.40%	0.30%	0.40%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 851	$ 851
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,919	$ 1,615
Percent of net assets	0.60%	0.50%	0.60%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 1,926	$ 1,926
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 2,531	$ 2,804
Percent of net assets	0.80%	0.80%	0.80%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 2,734	$ 2,734
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 235	$ 183
Percent of net assets	0.10%		0.10%
Equity Investments | Leisure Products
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments	Non-controlled/non-affiliate company investments	Non-controlled affiliate company investments
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 4,060	$ 4,060
Equity Investments | Office Services & Supplies
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Controlled affiliate company investments	Non-controlled/non-affiliate company investments	Controlled affiliate company investments
Investment, Issuer Geographic Region [Extensible Enumeration]	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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 2,890	$ 2,890
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 3,472
Percent of net assets		1.10%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 400
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 61
Equity Investments | Paper & Plastic Packaging Products & Materials
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]		Non-controlled/non-affiliate company investments
Investments, amortized cost		$ 400
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 179
Percent of net assets		0.10%
Equity 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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 600	$ 600
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 493	$ 459
Percent of net assets	0.20%	0.20%	0.20%
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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 840	$ 840
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,088	$ 1,023
Percent of net assets	0.30%	0.30%	0.30%
Equity Investments | Specialized Finance
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Controlled affiliate company investments	Non-controlled/non-affiliate company investments	Controlled affiliate company investments
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 21,104	$ 21,104
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 23,303	$ 22,782
Percent of net assets	7.50%	7.20%	7.50%
Equity 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
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investments, amortized cost	$ 19,568
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 9,407
Percent of net assets	3%		3%
Money Market Funds
Schedule of Investments [Line Items]
Percent of net assets	4.60%		4.60%
Money Market Funds amortized cost	$ 14,329
Money Market Fair Value	$ 14,329
Goldman Sachs Money Market Fund (CUSIP: 38141W315)
Schedule of Investments [Line Items]
Percent of net assets	0.50%		0.50%
Weighted average interest rate	5.20%		5.20%
Money Market Funds amortized cost	$ 1,515
Money Market Fair Value	$ 1,515
Invesco Treasury Money Market Fund (CUSIP: X9USDINVE)
Schedule of Investments [Line Items]
Percent of net assets	4.10%		4.10%
Weighted average interest rate	4.66%		4.66%
Money Market Funds amortized cost	$ 12,814
Money Market Fair Value	12,814
Honors Holdings, LLC [Member]
Schedule of Investments [Line Items]
Additional interest for senior term debt		3.50%
Tot Group, Inc. [Member] | Debt Investments
Schedule of Investments [Line Items]
Investments, amortized cost	8,054
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 8,054
Percent of net assets	2.60%		2.60%
Non-controlled/non-affiliate company investments
Schedule of Investments [Line Items]
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 525,821	$ 577,798
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:ABBCon-ciseOpticalGroupLLCMember	whfcl:ABBCon-ciseOpticalGroupLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Health Care Supplies	Health Care Supplies	Health Care Supplies
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]
Floor	0.75%	0.75%	0.75%
Spread Above Index	7.50%	7.50%	7.50%
Interest Rate	12.99%	13.01%	12.99%
Acquisition Date	Feb. 23, 2022	Feb. 23, 2022
Maturity Date	Feb. 23, 2028	Feb. 23, 2028	Feb. 23, 2028
Principal/Share Amount	$ 20,409	$ 20,409
Investments, amortized cost	20,099	20,056
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 18,768	$ 18,983
Percent of net assets	6%	6%	6%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]		whfcl:ALMMediaLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Research & Consulting Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6%
Interest Rate		11.50%
Acquisition Date		Nov. 25, 2019
Maturity Date		Nov. 25, 2024
Principal/Share Amount		$ 12,600
Investments, amortized cost		12,555
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 12,517
Percent of net assets		4%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
Investment, Identifier [Axis]: APG Lions Purchaser, LLC, First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ApgLionsPurchaserLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	5.75%		5.75%
Interest Rate	11.08%		11.08%
Acquisition Date	Apr. 26, 2024
Maturity Date	Apr. 16, 2030		Apr. 16, 2030
Investment, Identifier [Axis]: APG Lions Purchaser, LLC, First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ApgLionsPurchaserLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	5.75%		5.75%
Interest Rate	11.08%		11.08%
Acquisition Date	Apr. 26, 2024
Maturity Date	Apr. 16, 2030		Apr. 16, 2030
Principal/Share Amount	$ 69
Investments, amortized cost	68
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 68
Investment, Identifier [Axis]: APG Lions Purchaser, LLC, First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ApgLionsPurchaserLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	5.75%		5.75%
Interest Rate	11.08%		11.08%
Acquisition Date	Apr. 26, 2024
Maturity Date	Apr. 16, 2030		Apr. 16, 2030
Principal/Share Amount	$ 4,114
Investments, amortized cost	4,054
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 4,055
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:ATSGIncMember	whfcl:ATSGIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	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
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]
Floor	1%	1%	1%
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.98%	12.04%	11.98%
Acquisition Date	Nov. 12, 2021	Nov. 12, 2021
Maturity Date	Nov. 12, 2026	Nov. 12, 2026	Nov. 12, 2026
Principal/Share Amount	$ 3,761	$ 3,785
Investments, amortized cost	3,725	3,741
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 3,693	$ 3,745
Percent of net assets	1.20%	1.20%	1.20%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: ATSG, First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ATSGIncMember	whfcl:ATSGIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	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
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]
Floor	1%	1%	1%
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.98%	12.04%	11.98%
Acquisition Date	Mar. 27, 2023	Mar. 27, 2023
Maturity Date	Nov. 12, 2026	Nov. 12, 2026	Nov. 12, 2026
Investment owned shares | shares		9,873
Principal/Share Amount	$ 9,810
Investments, amortized cost	9,650	$ 9,678
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 9,633	$ 9,771
Investment, Identifier [Axis]: Alvaria Holdco (Cayman) (d/b/a Aspect Software, 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:AlvariaHoldcoMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	0.75%		0.75%
Spread Above Index	7.50%		7.50%
Interest Rate	12.96%		12.96%
Investment, interest rate, paid in cash	6.46%		6.46%
PIK interest rate	6.50%		6.50%
Acquisition Date	Mar. 20, 2024
Maturity Date	May 08, 2028		May 08, 2028
Principal/Share Amount	$ 1,722
Investments, amortized cost	1,531
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,670
Percent of net assets	0.40%		0.40%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: Alvaria Holdco (Cayman) (d/b/a Aspect Software, Inc.) First Lien Secured Term Loan Four
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:AlvariaHoldcoMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	0.75%		0.75%
Spread Above Index	7%		7%
Interest Rate	12.46%		12.46%
Acquisition Date	Mar. 20, 2024
Maturity Date	May 08, 2028		May 08, 2028
Principal/Share Amount	$ 2,400
Investments, amortized cost	2,357
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 401
Percent of net assets	0.10%		0.10%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: Alvaria Holdco (Cayman) (d/b/a Aspect Software, Inc.) First Lien Secured Term Loan Three
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:AlvariaHoldcoMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	0.75%		0.75%
Spread Above Index	7%		7%
Interest Rate	12.46%		12.46%
Acquisition Date	Mar. 20, 2024
Maturity Date	May 08, 2028		May 08, 2028
Principal/Share Amount	$ 9,600
Investments, amortized cost	9,428
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 7,931
Percent of net assets	2.70%		2.70%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: Alvaria Holdco (Cayman) (d/b/a Aspect Software, Inc.) First Lien Secured Term Loan Two
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:AlvariaHoldcoMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	0.75%		0.75%
Spread Above Index	7.50%		7.50%
Interest Rate	12.96%		12.96%
Investment, interest rate, paid in cash	7.46%		7.46%
PIK interest rate	5.50%		5.50%
Acquisition Date	Mar. 20, 2024
Maturity Date	May 08, 2028		May 08, 2028
Principal/Share Amount	$ 1,145
Investments, amortized cost	1,017
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 985
Percent of net assets	0.30%		0.30%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: American Crafts Holdings, LLC, Warrants
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Controlled affiliate company investments	Non-controlled/non-affiliate company investments	Controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:AmericanCraftsHoldingsLlcMember	whfcl:AmericanCraftsHoldingsLlcMember
Investment, Type [Extensible Enumeration]	Warrant [Member]	Warrant [Member]	Warrant [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Office Services & Supplies	Office Services & Supplies	Office Services & Supplies
Acquisition Date	Dec. 22, 2022	Dec. 22, 2022
Maturity Date	Dec. 22, 2032	Dec. 22, 2032	Dec. 22, 2032
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: American Crafts Lc Super 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:AmericanCraftsLCMember	whfcl:AmericanCraftsLCMember
Investment, Type [Extensible Enumeration]	whfcl:SuperPriorityFirstLienSecuredTermLoanMember	whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember	whfcl:SuperPriorityFirstLienSecuredTermLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Office Services & Supplies		Office Services & Supplies
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]
Floor	1%		1%
Spread Above Index	8.50%		8.50%
PIK interest rate	13.94%		13.94%
Acquisition Date	Jul. 25, 2023
Maturity Date	May 28, 2026		May 28, 2026
Principal/Share Amount	$ 2,043
Investments, amortized cost	2,043
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 2,012	$ 1,878
Percent of net assets	0.60%		0.60%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true 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]	Controlled affiliate company investments	Non-controlled/non-affiliate company investments	Controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:AmericanCraftsLCMember	whfcl:AmericanCraftsLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Office Services & Supplies	Office Services & Supplies	Office Services & Supplies
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]
Floor	1%	1%	1%
Spread Above Index	8.50%	8.50%	8.50%
PIK interest rate	13.94%	13.96%	13.94%
Acquisition Date	Jan. 25, 2022	Jan. 25, 2022
Maturity Date	May 28, 2026	May 28, 2026	May 28, 2026
Principal/Share Amount	$ 1,700	$ 1,585
Investments, amortized cost	1,458	1,458
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 74	$ 93
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: American Crafts, LC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Controlled affiliate company investments	Non-controlled/non-affiliate company investments	Controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:AmericanCraftsLCMember	whfcl:AmericanCraftsLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Office Services & Supplies	Office Services & Supplies	Office Services & Supplies
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]
Floor	1%	1%	1%
Spread Above Index	8.50%	8.50%	8.50%
PIK interest rate	13.94%	13.96%	13.94%
Acquisition Date	May 28, 2021	May 28, 2021
Maturity Date	May 28, 2026	May 28, 2026	May 28, 2026
Principal/Share Amount	$ 10,125	$ 9,441
Investments, amortized cost	8,720	8,720
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 442	$ 553
Percent of net assets	0.10%	0.20%	0.10%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: American Crafts, LC Priority First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Controlled affiliate company investments	Non-controlled/non-affiliate company investments	Controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:AmericanCraftsLCMember	whfcl:AmericanCraftsLCMember
Investment, Type [Extensible Enumeration]	whfcl:PriorityFirstLienSecuredTermLoanMember	whfcl:PriorityFirstLienSecuredTermLoanMember	whfcl:PriorityFirstLienSecuredTermLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Office Services & Supplies	Office Services & Supplies	Office Services & Supplies
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]
Floor	1%	1%	1%
Spread Above Index	8.50%	8.50%	8.50%
PIK interest rate	13.94%	13.96%	13.94%
Acquisition Date	Dec. 22, 2022	Dec. 22, 2022
Maturity Date	May 28, 2026	May 28, 2026	May 28, 2026
Principal/Share Amount	$ 5,479	$ 5,105
Investments, amortized cost	5,105	5,105
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 3,396	$ 3,226
Percent of net assets	1.10%	1%	1.10%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: American Crafts, LC Super Senior 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:AmericanCraftsLCMember	whfcl:AmericanCraftsLCMember
Investment, Type [Extensible Enumeration]	whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember	whfcl:SuperPriorityFirstLienSecuredTermLoanMember	whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Office Services & Supplies	Office Services & Supplies	Office Services & Supplies
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]
Floor	1%	1%	1%
Spread Above Index	8.50%	8.50%	8.50%
PIK interest rate	13.94%	13.96%	13.94%
Acquisition Date	May 02, 2024	Jul. 25, 2023
Maturity Date	May 28, 2026	May 28, 2026	May 28, 2026
Principal/Share Amount	$ 2,317	$ 1,903
Investments, amortized cost	2,317	1,903
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 2,317	$ 1,878
Percent of net assets	0.70%	0.60%	0.70%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: American Crafts, LC Super Senior Priority First Lien Secured Term Loan Due 01/31/24
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:AmericanCraftsLCMember
Investment, Type [Extensible Enumeration]	whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember		whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Office Services & Supplies		Office Services & Supplies
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]
Floor	1%		1%
Spread Above Index	8.50%		8.50%
Acquisition Date	Jan. 31, 2024
Maturity Date	May 28, 2026		May 28, 2026
Principal/Share Amount	$ 1,200
Investments, amortized cost	1,200
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,200
Percent of net assets	0.40%		0.40%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	false		false
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: American Crafts, LC Super Senior Priority First Lien Secured Term Loan one
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:AmericanCraftsLCMember
Investment, Type [Extensible Enumeration]	whfcl:SuperPriorityFirstLienSecuredTermLoanOneMember		whfcl:SuperPriorityFirstLienSecuredTermLoanOneMember
PIK interest rate	13.94%		13.94%
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,200
Investment, Identifier [Axis]: Arcole Holding Corporation, Equity
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:ArcoleHoldingCorporationMember
Investment, Type [Extensible Enumeration]		Equity Investments
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)				$ 6,380
Investment, Identifier [Axis]: Arcserve Cayman GP LLC (d/b/a Arcserve (USA), LLC) Common Units One
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:ArcserveCaymanGpLlcMember
Investment, Type [Extensible Enumeration]	whfcl:CommonUnitsMember		whfcl:CommonUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Systems Software		Systems Software
Acquisition Date	Jan. 03, 2024
Principal/Share Amount	$ 663
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Identifier [Axis]: Arcserve Cayman Opco LP (d/b/a Arcserve (USA), 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:ArcserveCaymanOpcoLpMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Systems Software		Systems 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]
Floor	1%		1%
Spread Above Index	8%		8%
Interest Rate	13.44%		13.44%
Acquisition Date	Jan. 03, 2024
Maturity Date	Jan. 04, 2027		Jan. 04, 2027
Principal/Share Amount	$ 645
Investments, amortized cost	629
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,279
Percent of net assets	0.40%		0.40%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC) Unsecured Loan One
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:ArcserveCaymanOpcoLpMember
Investment, Type [Extensible Enumeration]	whfcl:UnsecuredLoanMember		whfcl:UnsecuredLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Systems Software		Systems Software
Spread Above Index	9%		9%
Interest Rate	9%		9%
Acquisition Date	Jan. 03, 2024
Maturity Date	Jul. 02, 2029		Jul. 02, 2029
Principal/Share Amount	$ 555
Investments, amortized cost	542
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 555
Percent of net assets	0.20%		0.20%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Identifier [Axis]: Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC) Unsecured Loan Two
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:ArcserveCaymanOpcoLpMember
Investment, Type [Extensible Enumeration]	whfcl:UnsecuredLoanMember		whfcl:UnsecuredLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Systems Software		Systems Software
Spread Above Index	9%		9%
PIK interest rate	9%		9%
Acquisition Date	Jan. 03, 2024
Maturity Date	Jul. 02, 2029		Jul. 02, 2029
Principal/Share Amount	$ 568
Investments, amortized cost	555
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 568
Percent of net assets	0.20%		0.20%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Identifier [Axis]: Arcserve Cayman Topco LP (d/b/a Arcserve (USA), LLC) Common Units Two
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:ArcserveCaymanTopcoLpMember
Investment, Type [Extensible Enumeration]	whfcl:CommonUnitsMember		whfcl:CommonUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Systems Software		Systems Software
Acquisition Date	Jan. 03, 2024
Principal/Share Amount	$ 663
Investments, amortized cost	19,568
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 9,407
Percent of net assets	3%		3%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Identifier [Axis]: Arcstor Midco, LLC (d/b/a Arcserve (USA), LLC Priority First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]		whfcl:ArcstorMidcoLLCMember
Investment, Type [Extensible Enumeration]		whfcl:PriorityFirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Systems Software
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		8%
PIK interest rate		13.46%
Acquisition Date		Jul. 14, 2023
Maturity Date		Mar. 16, 2027
Principal/Share Amount		$ 1,078
Investments, amortized cost		1,050
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 1,046
Percent of net assets		0.30%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
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
Investment, Issuer Name [Extensible Enumeration]		whfcl:ArcstorMidcoLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Systems Software
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		7.75%
PIK interest rate		13.21%
Acquisition Date		Mar. 16, 2021
Maturity Date		Mar. 16, 2027
Principal/Share Amount		$ 21,613
Investments, amortized cost		19,568
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 10,477
Percent of net assets		3.30%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
Investment, Identifier [Axis]: Arteriocyte Medical Systems, Inc. First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ArteriocyteMedicalSystemsInc.Member	whfcl:ArteriocyteMedicalSystemsInc.Member
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Health Care Supplies	Health Care Supplies	Health Care Supplies
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]
Floor	1%	1%	1%
Spread Above Index	6%	6.25%	6%
Interest Rate	11.33%	11.60%	11.33%
Acquisition Date	Oct. 25, 2023	Oct. 25, 2023
Maturity Date	Oct. 18, 2028	Oct. 18, 2028	Oct. 18, 2028
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 8
Investment, Identifier [Axis]: Arteriocyte Medical Systems, Inc. First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ArteriocyteMedicalSystemsInc.Member	whfcl:ArteriocyteMedicalSystemsInc.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Health Care Supplies	Health Care Supplies	Health Care Supplies
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]
Floor	1%	1%	1%
Spread Above Index	6%	6.25%	6%
Interest Rate	11.33%	11.60%	11.33%
Acquisition Date	Oct. 25, 2023	Oct. 25, 2023
Maturity Date	Oct. 18, 2028	Oct. 18, 2028	Oct. 18, 2028
Investment owned shares | shares		5,022
Principal/Share Amount	$ 5,009
Investments, amortized cost	4,901	$ 4,901
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 4,980	$ 4,901
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
Investment, Issuer Name [Extensible Enumeration]		whfcl:AtlasPurchaserIncMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Application Software
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		0.75%
Spread Above Index	7.50%	5.25%	7.50%
Interest Rate		10.88%
Acquisition Date		Aug. 29, 2022
Maturity Date		May 08, 2028
Principal/Share Amount		$ 3,066
Investments, amortized cost		2,675
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 2,269
Percent of net assets		0.70%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
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
Investment, Issuer Name [Extensible Enumeration]		whfcl:AtlasPurchaserIncMember
Investment, Type [Extensible Enumeration]		whfcl:SecondLienSecuredTermLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Application Software
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		0.75%
Spread Above Index	7%	9%	7%
Interest Rate		14.64%
Acquisition Date		May 03, 2021
Maturity Date		May 07, 2029
Principal/Share Amount		$ 15,000
Investments, amortized cost		14,699
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 9,744
Percent of net assets		3.10%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
Investment, Identifier [Axis]: Avision Holdings, LLC (d/b/a Avision Sales Group) 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
Investment, Issuer Name [Extensible Enumeration]	Avision Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising		Advertising
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]
Floor	1%		1%
Spread Above Index	5.75%		5.75%
Interest Rate	11.19%		11.19%
Acquisition Date	May 31, 2024
Maturity Date	Dec. 15, 2026		Dec. 15, 2026
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: Avision Holdings, LLC (d/b/a Avision Sales Group) 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
Investment, Issuer Name [Extensible Enumeration]	Avision Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising		Advertising
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]
Floor	1%		1%
Spread Above Index	5.75%		5.75%
Interest Rate	11.19%		11.19%
Acquisition Date	May 31, 2024
Maturity Date	Dec. 15, 2026		Dec. 15, 2026
Principal/Share Amount	$ 662
Investments, amortized cost	649
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 649
Percent of net assets	0.20%		0.20%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false		false
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
Investment, Issuer Name [Extensible Enumeration]	Avision Holdings, LLC [Member]	Avision Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:ClassALLCInterestsMember	whfcl:ClassALLCInterestsMember	whfcl:ClassALLCInterestsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising	Advertising	Advertising
Acquisition Date	Dec. 15, 2021	Dec. 15, 2021
Principal/Share Amount	$ 200	$ 200
Investments, amortized cost	287	287
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 498	$ 411
Percent of net assets	0.20%	0.10%	0.20%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:BBQBuyerLLCMember	whfcl:BBQBuyerLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Broadline Retail	Broadline Retail	Broadline Retail
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]
Floor	1.50%	1.50%	1.50%
Spread Above Index	9.50%	9.50%	9.50%
Interest Rate	14.94%	14.96%	14.94%
Investment, interest rate, paid in cash	13.94%	13.96%	13.94%
PIK interest rate	1%	1%	1%
Acquisition Date	Dec. 02, 2021	Dec. 02, 2021
Maturity Date	Aug. 28, 2025	Aug. 28, 2025	Aug. 28, 2025
Principal/Share Amount	$ 2,629	$ 2,628
Investments, amortized cost	2,613	2,606
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 2,629	$ 2,613
Percent of net assets	0.80%	0.80%	0.80%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:BBQBuyerLLCMember	whfcl:BBQBuyerLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Broadline Retail	Broadline Retail	Broadline Retail
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]
Floor	1.50%	1.50%	1.50%
Spread Above Index	9.50%	9.50%	9.50%
Interest Rate	14.94%	14.96%	14.94%
Investment, interest rate, paid in cash	13.94%	13.96%	13.94%
PIK interest rate	1%	1%	1%
Acquisition Date	Aug. 28, 2020	Aug. 28, 2020
Maturity Date	Aug. 28, 2025	Aug. 28, 2025	Aug. 28, 2025
Principal/Share Amount	$ 12,892	$ 12,891
Investments, amortized cost	12,820	12,787
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 12,892	$ 12,818
Percent of net assets	4.20%	4.10%	4.20%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:BBQBuyerLLCMember	whfcl:BBQBuyerLLCMember
Investment, Type [Extensible Enumeration]	Common Stock [Member]	Common Stock [Member]	Common Stock [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Broadline Retail	Broadline Retail	Broadline Retail
Acquisition Date	Aug. 28, 2020	Aug. 28, 2020
Principal/Share Amount	$ 1,100	$ 1,100
Investments, amortized cost	1,100	1,100
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,119	$ 1,330
Percent of net assets	0.40%	0.40%	0.40%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:BLProductsParentLPMember	whfcl:BLProductsParentLPMember
Investment, Type [Extensible Enumeration]	whfcl:ClassAUnitsMember	whfcl:ClassAUnitsMember	whfcl:ClassAUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Industrial Machinery & Supplies & Components	Industrial Machinery & Supplies & Components	Industrial Machinery & Supplies & Components
Acquisition Date	Feb. 01, 2022	Feb. 01, 2022
Principal/Share Amount	$ 733	$ 733
Investments, amortized cost	788	788
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,253	$ 1,053
Percent of net assets	0.40%	0.30%	0.40%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:BPII-JLGroupHoldingsLPMember	whfcl:BPII-JLGroupHoldingsLPMember
Investment, Type [Extensible Enumeration]	whfcl:ClassAUnitsMember	whfcl:ClassAUnitsMember	whfcl:ClassAUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Environmental & Facilities Services	Environmental & Facilities Services	Environmental & Facilities Services
Acquisition Date	Dec. 29, 2021	Dec. 29, 2021
Principal/Share Amount	$ 90	$ 83
Investments, amortized cost	942	825
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,400	$ 983
Percent of net assets	0.40%	0.30%	0.40%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: BUSA Acquisition Co. (d/b/a BankCard USA Merchant 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
Investment, Issuer Name [Extensible Enumeration]	Busa Acquisition Co BankCard Usa Merchant Services Inc [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Data Processing & Outsourced Services		Data Processing & Outsourced 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]
Floor	1%		1%
Spread Above Index	6.50%		6.50%
Interest Rate	11.84%		11.84%
Acquisition Date	Apr. 04, 2024
Maturity Date	Mar. 30, 2029		Mar. 30, 2029
Principal/Share Amount	$ 735
Investments, amortized cost	714
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 717
Percent of net assets	0.20%		0.20%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	false		false
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: BUSA Acquisition Co. (d/b/a BankCard USA Merchant 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
Investment, Issuer Name [Extensible Enumeration]	Busa Acquisition Co BankCard Usa Merchant Services Inc [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Data Processing & Outsourced Services		Data Processing & Outsourced 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]
Floor	1%		1%
Spread Above Index	6.50%		6.50%
Interest Rate	11.81%		11.81%
Acquisition Date	Apr. 04, 2024
Maturity Date	Mar. 30, 2029		Mar. 30, 2029
Principal/Share Amount	$ 7,981
Investments, amortized cost	7,753
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 7,781
Percent of net assets	2.50%		2.50%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	false		false
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc) First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]		Banner Acquisition Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Construction & Engineering
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6%
Interest Rate		11.38%
Acquisition Date		Dec. 01, 2023
Maturity Date		Jan. 02, 2029
Principal/Share Amount		$ 140
Investments, amortized cost		137
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 137
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
Investment, Identifier [Axis]: Banner Acquisition Holdings, LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Banner Acquisition Holdings, LLC [Member]	Banner Acquisition Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6.25%	6%	6.25%
Interest Rate	11.58%	11.38%	11.58%
Acquisition Date	Dec. 21, 2023	Dec. 21, 2023
Maturity Date	Jan. 02, 2029	Jan. 02, 2029	Jan. 02, 2029
Investment owned shares | shares		1,400
Principal/Share Amount	$ 1,530
Investments, amortized cost	1,497	$ 1,366
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,506	$ 1,365
Investment, Identifier [Axis]: Banner Acquisition Holdings, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Banner Acquisition Holdings, LLC [Member]	Banner Acquisition Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6.25%	6%	6.25%
Interest Rate	11.58%	11.37%	11.58%
Acquisition Date	Dec. 21, 2023	Dec. 21, 2023
Maturity Date	Jan. 02, 2029	Jan. 02, 2029	Jan. 02, 2029
Investment owned shares | shares		196
Principal/Share Amount	$ 196
Investments, amortized cost	192	$ 191
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 197	$ 191
Investment, Identifier [Axis]: Banner Acquisition Holdings, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Banner Acquisition Holdings, LLC [Member]	Banner Acquisition Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6.25%	6%	6.25%
Interest Rate	11.58%	11.38%	11.58%
Acquisition Date	Dec. 21, 2023	Dec. 21, 2023
Maturity Date	Jan. 02, 2029	Jan. 02, 2029	Jan. 02, 2029
Investment owned shares | shares		3,091
Principal/Share Amount	$ 3,091
Investments, amortized cost	3,023	$ 3,015
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 3,037	$ 3,015
Investment, Identifier [Axis]: Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.) First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Barrett Purchaser LLC [Member]	Barrett Purchaser LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	0.75%	0.75%	0.75%
Spread Above Index	6%	6%	6%
Interest Rate	11.34%	11.36%	11.34%
Acquisition Date	Jan. 10, 2024	Nov. 21, 2023
Maturity Date	Nov. 21, 2029	Nov. 21, 2029	Nov. 21, 2029
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ (3)
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
Investment, Identifier [Axis]: Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.) First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Barrett Purchaser LLC [Member]	Barrett Purchaser LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	0.75%	0.75%	0.75%
Spread Above Index	5%	6%	5%
Interest Rate	13.50%	11.36%	13.50%
Acquisition Date	Jan. 10, 2024	Nov. 21, 2023
Maturity Date	Nov. 21, 2028	Nov. 21, 2028	Nov. 21, 2028
Principal/Share Amount	$ 75
Investments, amortized cost	73
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 76
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
Investment, Identifier [Axis]: Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.) First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Barrett Purchaser LLC [Member]	Barrett Purchaser LLC [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	0.75%	0.75%	0.75%
Spread Above Index	6%	6%	6%
Interest Rate	11.34%	11.36%	11.34%
Acquisition Date	Jan. 10, 2024	Nov. 21, 2023
Maturity Date	Nov. 21, 2029	Nov. 21, 2029	Nov. 21, 2029
Principal/Share Amount	$ 3,635	$ 3,654
Investments, amortized cost	3,554	3,564
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 3,584	$ 3,564
Percent of net assets		1.10%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
Investment, Identifier [Axis]: Branford Filtration, LLC (d/b/a Clean Solutions Group) 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
Investment, Issuer Name [Extensible Enumeration]	Branford Filtration, LLC [Member]	Branford Filtration, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.98%	11.96%	11.98%
Acquisition Date	Nov. 17, 2023	Nov. 17, 2023
Maturity Date	Nov. 17, 2028	Nov. 17, 2028	Nov. 17, 2028
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 8
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Branford Filtration, LLC (d/b/a Clean Solutions Group) 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
Investment, Issuer Name [Extensible Enumeration]	Branford Filtration, LLC [Member]	Branford Filtration, LLC [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.98%	11.96%	11.98%
Acquisition Date	Nov. 17, 2023	Nov. 17, 2023
Maturity Date	Nov. 17, 2028	Nov. 17, 2028	Nov. 17, 2028
Principal/Share Amount	$ 11,555	$ 11,613
Investments, amortized cost	11,327	11,358
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 11,613	$ 11,358
Percent of net assets	3.70%	3.60%	3.70%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:BridgepointHealthcareLLCMember	whfcl:BridgepointHealthcareLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Health Care Facilities	Health Care Facilities	Health Care Facilities
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]
Floor	1%	1%	1%
Spread Above Index	8%	8%	8%
Interest Rate	13.44%	13.46%	13.44%
Acquisition Date	Oct. 05, 2021	Oct. 05, 2021
Maturity Date	Oct. 05, 2026	Oct. 05, 2026	Oct. 05, 2026
Principal/Share Amount	$ 238
Investments, amortized cost	236
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 223	$ (1)
Percent of net assets	0.10%		0.10%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:BridgepointHealthcareLLCMember	whfcl:BridgepointHealthcareLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Health Care Facilities	Health Care Facilities	Health Care Facilities
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]
Floor	1%	1%	1%
Spread Above Index	8%	8%	8%
Interest Rate	13.44%	13.46%	13.44%
Acquisition Date	Oct. 05, 2021	Oct. 05, 2021
Maturity Date	Oct. 05, 2026	Oct. 05, 2026	Oct. 05, 2026
Principal/Share Amount	$ 8,795	$ 9,073
Investments, amortized cost	8,715	8,973
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 8,644	$ 8,967
Percent of net assets	2.80%	2.80%	2.80%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Buckeye Acquiror LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:BuckeyeAcquirorLlcMember	whfcl:BuckeyeAcquirorLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.94%	11.96%	11.94%
Acquisition Date	Aug. 09, 2023	Aug. 09, 2023
Maturity Date	Aug. 01, 2029	Aug. 01, 2029	Aug. 01, 2029
Principal/Share Amount	$ 898
Investments, amortized cost	877
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 902	$ (3)
Investment, Identifier [Axis]: Buckeye Acquiror LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:BuckeyeAcquirorLlcMember	whfcl:BuckeyeAcquirorLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.94%	11.96%	11.94%
Acquisition Date	Aug. 09, 2023	Aug. 09, 2023
Maturity Date	Aug. 01, 2029	Aug. 01, 2029	Aug. 01, 2029
Investment owned shares | shares		180
Principal/Share Amount	$ 271
Investments, amortized cost	265	$ 176
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 283	$ 181
Investment, Identifier [Axis]: Buckeye Acquiror LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:BuckeyeAcquirorLlcMember	whfcl:BuckeyeAcquirorLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.94%	11.96%	11.94%
Acquisition Date	Aug. 09, 2023	Aug. 09, 2023
Maturity Date	Aug. 01, 2029	Aug. 01, 2029	Aug. 01, 2029
Investment owned shares | shares		5,985
Principal/Share Amount	$ 6,167
Investments, amortized cost	6,035	$ 5,845
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 6,192	$ 5,898
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
Investment, Issuer Name [Extensible Enumeration]		whfcl:BulkMidcoLLCMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Cable & Satellite
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		7.50%
Interest Rate		12.96%
Investment, interest rate, paid in cash		11.96%
PIK interest rate		1%
Acquisition Date		Oct. 28, 2022
Maturity Date		Jun. 10, 2024
Principal/Share Amount		$ 2,000
Investments, amortized cost		1,989
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 1,972
Percent of net assets		0.60%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
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
Investment, Issuer Name [Extensible Enumeration]		whfcl:BulkMidcoLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Cable & Satellite
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		7.50%
Interest Rate		12.96%
Investment, interest rate, paid in cash		11.96%
PIK interest rate		1%
Acquisition Date		Oct. 28, 2022
Maturity Date		Jun. 10, 2024
Principal/Share Amount		$ 19,267
Investments, amortized cost		19,237
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 18,997
Percent of net assets		6%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:CXHoldcoLLCMember	whfcl:CXHoldcoLLCMember
Investment, Type [Extensible Enumeration]	whfcl:CommonUnitsMember	whfcl:CommonUnitsMember	whfcl:CommonUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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	$ 1,068
Investments, amortized cost	1,116	1,116
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,261	$ 1,715
Percent of net assets	0.40%	0.50%	0.40%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:CampFacilityServicesHoldingsLLCMember	whfcl:CampFacilityServicesHoldingsLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Specialized Consumer Services	Specialized Consumer Services	Specialized Consumer 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]
Floor	1%	1%	1%
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.94%	11.96%	11.94%
Acquisition Date	Nov. 16, 2021	Nov. 16, 2021
Maturity Date	Nov. 16, 2027	Nov. 16, 2027	Nov. 16, 2027
Principal/Share Amount	$ 10,993	$ 11,668
Investments, amortized cost	10,869	11,517
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 10,899	$ 11,496
Percent of net assets	3.50%	3.60%	3.50%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:CampFacilityServicesParentLLCMember	whfcl:CampFacilityServicesParentLLCMember
Investment, Type [Extensible Enumeration]	Preferred Units [Member]	Preferred Units [Member]	Preferred Units [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Specialized Consumer Services	Specialized Consumer Services	Specialized Consumer Services
Spread Above Index	10%	10%	10%
PIK interest rate	10%	10%	10%
Acquisition Date	Nov. 16, 2021	Nov. 16, 2021
Principal/Share Amount	$ 15	$ 15
Investments, amortized cost	840	840
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,088	$ 1,023
Percent of net assets	0.30%	0.30%	0.30%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	true	true	true
Investment, Identifier [Axis]: Cennox Holdings Limited, First lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.25%, Rate 11.56%, Due 5/4/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:CennoxHoldingsLimitedMember	whfcl:CennoxHoldingsLimitedMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	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
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Base Rate [Member]	whfcl:SolarHoldingsBidcoLimitedFirstLienSecuredTermLoanSoniaMember	Base Rate [Member]
Floor	1%	1%	1%
Spread Above Index	6%	6.25%	6%
Interest Rate	13.13%	11.56%	13.13%
PIK interest rate		0.25%
Acquisition Date	Jul. 16, 2021	Jul. 16, 2021
Maturity Date	May 04, 2026	May 04, 2026	May 04, 2026
Investment owned shares | shares		864
Principal/Share Amount	$ 351
Investments, amortized cost	538	$ 1,182
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 442	$ 1,082
Investment, Identifier [Axis]: Cennox Holdings Limited., First lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 11.59%, Due 5/4/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:CennoxHoldingsLimitedMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		IT Consulting And Other Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]		whfcl:SolarHoldingsBidcoLimitedFirstLienSecuredTermLoanSoniaMember
Floor		1%
Spread Above Index		6.25%
Interest Rate		11.59%
Investment, interest rate, paid in cash		11.34%
PIK interest rate		0.25%
Acquisition Date		Jul. 16, 2021
Maturity Date		May 04, 2026
Investment owned shares | shares		2,825
Investments, amortized cost		$ 3,863
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 3,538
Investment, Identifier [Axis]: Cennox Holdings Limited., First lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 11.68%, Due 5/4/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:CennoxHoldingsLimitedMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	IT Consulting And Other Services		IT Consulting And Other Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Sterling Overnight Index Average [Member]		Sterling Overnight Index Average [Member]
Floor	1%		1%
Spread Above Index	6%		6%
Interest Rate	11.61%		11.61%
Acquisition Date	Jul. 16, 2021
Maturity Date	May 04, 2026		May 04, 2026
Principal/Share Amount	$ 2,814
Investments, amortized cost	3,855
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 3,533
Investment, Identifier [Axis]: Cennox, Inc, First lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 10.40%, Due 5/4/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:CennoxHoldingsLimitedMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	IT Consulting And Other Services		IT Consulting And Other Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:EuroInterbankOfferedRateMember		whfcl:EuroInterbankOfferedRateMember
Floor	1%		1%
Spread Above Index	6.25%		6.25%
Interest Rate	9.96%		9.96%
Acquisition Date	Jun. 28, 2022
Maturity Date	May 04, 2026		May 04, 2026
Principal/Share Amount	$ 9,385
Investments, amortized cost	9,837
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 10,052
Investment, Identifier [Axis]: Cennox, Inc, First lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 10.44%, Due 5/4/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:CennoxInc.Member
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		IT Consulting And Other Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]		whfcl:EuroInterbankOfferedRateMember
Floor		1%
Spread Above Index		6.50%
Interest Rate		10.44%
PIK interest rate		0.25%
Acquisition Date		Jun. 28, 2022
Maturity Date		May 04, 2026
Investment owned shares | shares		9,422
Investments, amortized cost		$ 9,851
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 10,257
Investment, Identifier [Axis]: Chase Products Co. (f/k/a Starco) First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:ChaseProductsCoMember	whfcl:ChaseProductsCoMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Diversified Chemicals
Spread Above Index		12%
PIK interest rate	12%	12%	12%
Acquisition Date		Mar. 16, 2023
Maturity Date		Mar. 16, 2028
Principal/Share Amount		$ 2,962
Investments, amortized cost		2,962
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 2,958	$ 2,793
Percent of net assets		0.90%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
Investment, Identifier [Axis]: Chase Products Co. (f/k/a Starco) First Lien Secured Term Loan 12.00 PIK
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:ChaseProductsCoMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Chemicals		Diversified Chemicals
Spread Above Index	12%		12%
Acquisition Date	Mar. 16, 2023
Maturity Date	Mar. 16, 2028		Mar. 16, 2028
Principal/Share Amount	$ 3,144
Investments, amortized cost	3,144
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 2,958
Percent of net assets	0.90%		0.90%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false		false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:ClaridgeProductsandEquipmentLLCMember	whfcl:ClaridgeProductsandEquipmentLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Construction Materials	Construction Materials	Construction Materials
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Base Rate [Member]	Base Rate [Member]	Base Rate [Member]
Floor	1%	1%	1%
Spread Above Index	8.31%	7.56%	8.31%
Interest Rate	15.10%	14.41%	15.10%
Investment, interest rate, paid in cash	12.85%	12.91%	12.85%
PIK interest rate	2.25%	1.50%	2.25%
Acquisition Date	Dec. 30, 2020	Dec. 30, 2020
Maturity Date	Dec. 30, 2025	Dec. 30, 2025	Dec. 30, 2025
Principal/Share Amount	$ 632	$ 632
Investments, amortized cost	629	628
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 548	$ 496
Percent of net assets	0.20%	0.20%	0.20%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:ClaridgeProductsandEquipmentLLCMember	whfcl:ClaridgeProductsandEquipmentLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Construction Materials	Construction Materials	Construction Materials
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]
Floor	1%	1%	1%
Spread Above Index	8.75%	8%	8.75%
Interest Rate	14.19%	13.50%	14.19%
Investment, interest rate, paid in cash	11.94%	12%	11.94%
PIK interest rate	2.25%	1.50%	2.25%
Acquisition Date	Dec. 30, 2020	Dec. 30, 2020
Maturity Date	Dec. 30, 2025	Dec. 30, 2025	Dec. 30, 2025
Principal/Share Amount	$ 6,542	$ 7,452
Investments, amortized cost	6,506	7,395
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 5,758	$ 6,405
Percent of net assets	1.80%	2%	1.80%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Clark Restaurant Service, LLC, First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ClarkRestaurantServiceLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Food Distributors		Food 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]
Floor	1%		1%
Spread Above Index	5.75%		5.75%
Interest Rate	11.08%		11.08%
Acquisition Date	Jun. 14, 2024
Maturity Date	May 10, 2029		May 10, 2029
Investment, Identifier [Axis]: Clark Restaurant Service, LLC, First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ClarkRestaurantServiceLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Food Distributors		Food 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]
Floor	1%		1%
Spread Above Index	5.75%		5.75%
Interest Rate	11.08%		11.08%
Acquisition Date	Jun. 14, 2024
Maturity Date	May 10, 2029		May 10, 2029
Principal/Share Amount	$ 5,031
Investments, amortized cost	4,933
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 4,934
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:CleanChoiceEnergyIncMember	whfcl:CleanChoiceEnergyIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Electric Utilities	Electric Utilities	Electric Utilities
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]
Floor	1%	1%	1%
Spread Above Index	7.59%	7.58%	7.59%
Interest Rate	13.06%	13.14%	13.06%
Acquisition Date	Oct. 12, 2021	Oct. 12, 2021
Maturity Date	Oct. 12, 2026	Oct. 12, 2026	Oct. 12, 2026
Principal/Share Amount	$ 15,955	$ 15,955
Investments, amortized cost	15,759	15,715
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 16,083	$ 15,954
Percent of net assets	5.10%	5%	5.10%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:CoastalTelevisionBroadcastingGroupLLCMember	whfcl:CoastalTelevisionBroadcastingGroupLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	7%	7%	7%
Interest Rate	12.44%	12.46%	12.44%
Acquisition Date	Dec. 30, 2021	Dec. 30, 2021
Maturity Date	Dec. 30, 2026	Dec. 30, 2026	Dec. 30, 2026
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ (1)	$ (3)
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:CoastalTelevisionBroadcastingGroupLLCMember	whfcl:CoastalTelevisionBroadcastingGroupLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	7%	7%	7%
Interest Rate	12.44%	12.46%	12.44%
Acquisition Date	Dec. 30, 2021	Dec. 30, 2021
Maturity Date	Dec. 30, 2026	Dec. 30, 2026	Dec. 30, 2026
Principal/Share Amount	$ 8,444	$ 7,418
Investments, amortized cost	8,348	7,329
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 8,339	$ 7,246
Percent of net assets	2.70%	2.30%	2.70%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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]		whfcl:DrewFoamCompaniesIncMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Building Products
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		7.25%
Interest Rate		12.75%
Acquisition Date		Nov. 09, 2020
Maturity Date		Nov. 05, 2025
Investment owned shares | shares		13,644
Investments, amortized cost		$ 13,541
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 13,313
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]	whfcl:DrewFoamCompaniesIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	6%		6%
Interest Rate	12.73%		12.73%
Acquisition Date	Nov. 09, 2020
Maturity Date	Nov. 05, 2025		Nov. 05, 2025
Principal/Share Amount	$ 13,573
Investments, amortized cost	13,498
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 13,449
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]	whfcl:E-PhoenixAcquisitionCo.Inc.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	5.50%		5.50%
Interest Rate	10.98%		10.98%
Acquisition Date	Jul. 15, 2021
Maturity Date	Jun. 23, 2027		Jun. 23, 2027
Principal/Share Amount	$ 8,387
Investments, amortized cost	8,335
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 8,387
Investment, Identifier [Axis]: E-Phoenix Acquisition Co. Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 5.50%, Rate11.00%, Due 6/23/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:E-PhoenixAcquisitionCo.Inc.Member
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Services [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		5.50%
Interest Rate		11%
Acquisition Date		Jul. 15, 2021
Maturity Date		Jun. 23, 2027
Investment owned shares | shares		8,604
Investments, amortized cost		$ 8,541
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 8,562
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:EddyAcquisitionsLLCMember	whfcl:EddyAcquisitionsLLCMember
Investment, Type [Extensible Enumeration]	Preferred Units [Member]	Preferred Units [Member]	Preferred Units [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Education Services	Education Services	Education Services
Spread Above Index	12%	12%	12%
Interest Rate	12%		12%
Acquisition Date	Sep. 15, 2021	Sep. 15, 2021
Principal/Share Amount	$ 167	$ 167
Investments, amortized cost	167	167
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1	$ 18
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:EducationDynamicsLLCMember	whfcl:EducationDynamicsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Education Services	Education Services	Education 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]
Floor	1%	1%	1%
Spread Above Index	7%	7%	7%
Interest Rate	12.44%	12.46%	12.44%
Investment, interest rate, paid in cash	11.94%	11.96%	11.94%
PIK interest rate	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
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ (56)	$ (22)
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:EducationDynamicsLLCMember	whfcl:EducationDynamicsLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Education Services	Education Services	Education 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]
Floor	1%	1%	1%
Spread Above Index	7%	7%	7%
Interest Rate	12.44%	12.46%	12.44%
Investment, interest rate, paid in cash	11.94%	11.96%	11.94%
PIK interest rate	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
Principal/Share Amount	$ 12,494	$ 12,784
Investments, amortized cost	12,385	12,647
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 11,803	$ 12,407
Percent of net assets	3.80%	4%	3.80%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:EducationDynamicsLLCMember	whfcl:EducationDynamicsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:SubordinatedUnsecuredTermLoanMember	whfcl:SubordinatedUnsecuredTermLoanMember	whfcl:SubordinatedUnsecuredTermLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Education Services	Education Services	Education Services
Spread Above Index	4%	4%	4%
Interest Rate	4%	4%	4%
Acquisition Date	Sep. 15, 2021	Sep. 15, 2021
Maturity Date	Mar. 15, 2027	Mar. 15, 2027	Mar. 15, 2027
Principal/Share Amount	$ 167	$ 167
Investments, amortized cost	167	167
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 138	$ 167
Percent of net assets		0.10%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]		whfcl:EmpireOfficeIncMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Office Services & Supplies
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1.50%
Spread Above Index		6.75%
Interest Rate		12.21%
Acquisition Date		Aug. 17, 2021
Maturity Date		Apr. 12, 2024
Principal/Share Amount		$ 4,556
Investments, amortized cost		4,545
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 4,556
Percent of net assets		1.40%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
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
Investment, Issuer Name [Extensible Enumeration]		whfcl:EmpireOfficeIncMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Office Services & Supplies
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1.50%
Spread Above Index		6.75%
Interest Rate		12.21%
Acquisition Date		Apr. 12, 2019
Maturity Date		Apr. 12, 2024
Principal/Share Amount		$ 10,947
Investments, amortized cost		10,931
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 10,947
Percent of net assets		3.50%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
Investment, Identifier [Axis]: Event Services America, Inc. (d/b/a Contemporary Services 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:EventServicesAmericaIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Security & Alarm Services		Security & Alarm 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]
Floor	1%		1%
Spread Above Index	6.75%		6.75%
Interest Rate	12.09%		12.09%
Acquisition Date	Jan. 31, 2024
Maturity Date	Jan. 31, 2029		Jan. 31, 2029
Principal/Share Amount	$ 7,000
Investments, amortized cost	6,840
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 6,930
Percent of net assets	2.20%		2.20%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:FgiAcquisitionCorpMember	whfcl:FgiAcquisitionCorpMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.98%	12%	11.98%
Acquisition Date	Oct. 28, 2019	Oct. 28, 2019
Maturity Date	Oct. 29, 2026	Oct. 29, 2026	Oct. 29, 2026
Principal/Share Amount	$ 16,110	$ 16,193
Investments, amortized cost	15,775	15,786
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 16,110	$ 16,110
Percent of net assets	5.30%	5.10%	5.30%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:FoodservicesBrandGroupLlcMember	whfcl:FoodservicesBrandGroupLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	8%	8%	8%
Interest Rate	13.49%	13.52%	13.49%
Acquisition Date	Nov. 22, 2022	Nov. 22, 2022
Maturity Date	Dec. 09, 2025	Dec. 09, 2025	Dec. 09, 2025
Principal/Share Amount	$ 357	$ 357
Investments, amortized cost	357	357
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 228	$ 200
Percent of net assets	0.10%	0.10%	0.10%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]		whfcl:FoodservicesBrandGroupLlcMember
Investment, Type [Extensible Enumeration]		whfcl:SecondLienSecuredTermLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Distributors
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1.50%
Spread Above Index		6.50%
Interest Rate		11.96%
Acquisition Date		Nov. 22, 2022
Maturity Date		Jan. 08, 2026
Principal/Share Amount		$ 5,171
Investments, amortized cost		4,915
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 1,601
Percent of net assets		0.50%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
Investment, Identifier [Axis]: Forward Solutions, LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ForwardSolutionsLlcMember	whfcl:ForwardSolutionsLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising	Advertising	Advertising
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]
Floor	1%	1%	1%
Spread Above Index	5.75%	6.75%	5.75%
Interest Rate	11.98%	12.25%	11.98%
Acquisition Date	Mar. 11, 2022	Mar. 11, 2022
Maturity Date	Dec. 15, 2026	Dec. 15, 2026	Dec. 15, 2026
Investment owned shares | shares		3,054
Principal/Share Amount	$ 3,039
Investments, amortized cost	3,009	$ 3,018
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 3,039	$ 3,025
Investment, Identifier [Axis]: Forward Solutions, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ForwardSolutionsLlcMember	whfcl:ForwardSolutionsLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising	Advertising	Advertising
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]
Floor	1%	1%	1%
Spread Above Index	5.75%	6.75%	5.75%
Interest Rate	11.98%	12.25%	11.98%
Acquisition Date	Feb. 18, 2022	Feb. 18, 2022
Maturity Date	Dec. 15, 2026	Dec. 15, 2026	Dec. 15, 2026
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 6	$ 1
Investment, Identifier [Axis]: Forward Solutions, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ForwardSolutionsLlcMember	whfcl:ForwardSolutionsLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising	Advertising	Advertising
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]
Floor	1%	1%	1%
Spread Above Index	5.75%	6.75%	5.75%
Interest Rate	11.98%	12.25%	11.98%
Acquisition Date	Feb. 18, 2022	Feb. 18, 2022
Maturity Date	Dec. 15, 2026	Dec. 15, 2026	Dec. 15, 2026
Investment owned shares | shares		9,100
Principal/Share Amount	$ 9,054
Investments, amortized cost	8,965	$ 8,991
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 9,054	$ 9,014
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:FuturePaymentTechnologiesLPMember	whfcl:FuturePaymentTechnologiesLPMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Data Processing & Outsourced Services	Data Processing & Outsourced Services	Data Processing & Outsourced 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]
Floor	1%	1%	1%
Spread Above Index	8.25%	8.25%	8.25%
Interest Rate	13.68%	13.69%	13.68%
Acquisition Date	Dec. 23, 2016	Dec. 23, 2016
Maturity Date	Dec. 05, 2025	Dec. 05, 2025	Dec. 05, 2025
Principal/Share Amount	$ 21,043	$ 21,665
Investments, amortized cost	20,982	21,582
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 21,043	$ 21,480
Percent of net assets	6.70%	6.80%	6.70%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Geo Logic Systems Ltd First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:GeoLogicSystemsLtdMember	whfcl:GeoLogicSystemsLtdMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Data Processing & Outsourced Services	Data Processing & Outsourced Services	Data Processing & Outsourced Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:CanadianOvernightRepoRateAverageMember	whfcl:CanadianDollarOfferedRateMember	whfcl:CanadianOvernightRepoRateAverageMember
Floor	1%	1%	1%
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.47%	11.94%	11.47%
Acquisition Date	Jan. 22, 2020	Jan. 22, 2020
Maturity Date	Dec. 19, 2024	Dec. 19, 2024	Dec. 19, 2024
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 3	$ 5
Investment, Identifier [Axis]: Geo Logic Systems Ltd First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:GeoLogicSystemsLtdMember	whfcl:GeoLogicSystemsLtdMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Data Processing & Outsourced Services	Data Processing & Outsourced Services	Data Processing & Outsourced Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:CanadianOvernightRepoRateAverageMember	whfcl:CanadianDollarOfferedRateMember	whfcl:CanadianOvernightRepoRateAverageMember
Floor	1%	1%	1%
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.47%	11.94%	11.47%
Acquisition Date	Jan. 22, 2020	Jan. 22, 2020
Maturity Date	Dec. 19, 2024	Dec. 19, 2024	Dec. 19, 2024
Investment owned shares | shares		19,416
Principal/Share Amount	$ 18,686
Investments, amortized cost	14,431	$ 14,969
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 13,653	$ 14,654
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:GulfWindsInternationalAcquisitionLlcMember	whfcl:GulfWindsInternationalAcquisitionLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	7.50%	7%	7.50%
Interest Rate	12.94%	12.46%	12.94%
Acquisition Date	Dec. 16, 2022	Dec. 16, 2022
Maturity Date	Dec. 18, 2028	Dec. 18, 2028	Dec. 18, 2028
Principal/Share Amount	$ 162
Investments, amortized cost	158
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 173	$ 7
Percent of net assets	0.10%		0.10%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:GulfWindsInternationalAcquisitionLlcMember	whfcl:GulfWindsInternationalAcquisitionLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	7.50%	7%	7.50%
Interest Rate	12.94%	12.46%	12.94%
Acquisition Date	Dec. 16, 2022	Dec. 16, 2022
Maturity Date	Dec. 18, 2028	Dec. 18, 2028	Dec. 18, 2028
Principal/Share Amount	$ 9,039	$ 4,804
Investments, amortized cost	8,832	4,685
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 9,039	$ 4,738
Percent of net assets	2.90%	1.50%	2.90%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:HCSalonHoldingsIncMember	whfcl:HCSalonHoldingsIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Specialized Consumer Services	Specialized Consumer Services	Specialized Consumer 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]
Floor	1%	1%	1%
Spread Above Index	7%	6.50%	7%
Interest Rate	12.60%	12.11%	12.60%
Acquisition Date	Sep. 30, 2021	Sep. 30, 2021
Maturity Date	Sep. 30, 2026	Sep. 30, 2026	Sep. 30, 2026
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 6	$ 8
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:HCSalonHoldingsIncMember	whfcl:HCSalonHoldingsIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Specialized Consumer Services	Specialized Consumer Services	Specialized Consumer 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]
Floor	1%	1%	1%
Spread Above Index	7%	6.50%	7%
Interest Rate	12.60%	12.11%	12.60%
Acquisition Date	Sep. 30, 2021	Sep. 30, 2021
Maturity Date	Sep. 30, 2026	Sep. 30, 2026	Sep. 30, 2026
Principal/Share Amount	$ 11,346	$ 11,404
Investments, amortized cost	11,244	11,279
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 11,346	$ 11,404
Percent of net assets	3.60%	3.60%	3.60%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread Base Plus, 6.22%, Rate 12.10%, Due 10/19/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:HrgManagementLlcHomeriverGroupLlcMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Operating Companies
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Base Rate [Member]
Floor		1%
Spread Above Index		6.22%
Interest Rate		12.10%
Acquisition Date		Feb. 18, 2022
Maturity Date		Oct. 19, 2026
Investment owned shares | shares		2,398
Investments, amortized cost		$ 2,369
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 2,282
Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L Plus, 6.22%, Rate 12.03%, Due 10/19/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:HrgManagementLlcHomeriverGroupLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Real Estate Operating Companies		Real Estate Operating Companies
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Base Rate [Member]		Base Rate [Member]
Floor	1%		1%
Spread Above Index	6.25%		6.25%
Acquisition Date	Feb. 18, 2022
Maturity Date	Oct. 19, 2026		Oct. 19, 2026
Principal/Share Amount	$ 1,398
Investments, amortized cost	1,385
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,359
Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate 11.72%, Due 10/19/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:HrgManagementLlcHomeriverGroupLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	6.25%		6.25%
Acquisition Date	Feb. 18, 2022
Maturity Date	Oct. 19, 2026		Oct. 19, 2026
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ (23)
Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread Plus, 6.25%, Rate 11.80%, Due 10/19/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:HrgManagementLlcHomeriverGroupLlcMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Operating Companies
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6.25%
Interest Rate		11.80%
Acquisition Date		Feb. 18, 2022
Maturity Date		Oct. 19, 2026
Investment owned shares | shares		596
Investments, amortized cost		$ 589
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 547
Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate 11.72%, Due 10/19/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:HrgManagementLlcHomeriverGroupLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	6.25%		6.25%
Acquisition Date	Dec. 28, 2021
Maturity Date	Oct. 19, 2026		Oct. 19, 2026
Principal/Share Amount	$ 5,574
Investments, amortized cost	5,523
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 5,407
Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus, 6.25%, Rate 11.80%, Due 10/19/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:HrgManagementLlcHomeriverGroupLlcMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Operating Companies
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6.25%
Interest Rate		11.80%
Acquisition Date		Dec. 28, 2021
Maturity Date		Oct. 19, 2026
Investment owned shares | shares		9,555
Investments, amortized cost		$ 9,448
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 9,074
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:HollanderIntermediateLlcMember	whfcl:HollanderIntermediateLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	3%	3%	3%
Spread Above Index	8.75%	10.75%	8.75%
Interest Rate	14.21%	16.22%	14.21%
Acquisition Date	Sep. 19, 2022	Sep. 19, 2022
Maturity Date	Sep. 21, 2026	Sep. 21, 2026	Sep. 21, 2026
Principal/Share Amount	$ 4,687	$ 4,689
Investments, amortized cost	4,664	4,661
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 4,170	$ 4,179
Percent of net assets	1.30%	1.30%	1.30%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Honors Holdings, LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments	Non-controlled/non-affiliate company investments	Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Honors Holdings, LLC [Member]	Honors Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Leisure Facilities	Leisure Facilities	Leisure Facilities
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]
Floor	1%	1%	1%
Spread Above Index	7.50%	6.37%	7.50%
Interest Rate	12.99%	11.90%	12.99%
Acquisition Date	Sep. 06, 2019	Sep. 06, 2019
Maturity Date	Sep. 06, 2024	Sep. 06, 2024	Sep. 06, 2024
Principal/Share Amount	$ 5,281	$ 4,650
Investments, amortized cost	5,267	4,631
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 4,490	$ 4,603
Percent of net assets	1.40%	1.50%	1.40%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Honors Holdings, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments		Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Honors Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Leisure Facilities		Leisure Facilities
Investment, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:PrimeRateMember		us-gaap:PrimeRateMember
Floor	1%		1%
Spread Above Index	6.30%		6.30%
Interest Rate	12.59%		12.59%
Acquisition Date	Jun. 04, 2024
Maturity Date	Sep. 06, 2024		Sep. 06, 2024
Principal/Share Amount	$ 811
Investments, amortized cost	811
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 689
Percent of net assets	0.20%		0.20%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	false		false
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: Honors Holdings, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments	Non-controlled/non-affiliate company investments	Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Honors Holdings, LLC [Member]	Honors Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Leisure Facilities	Leisure Facilities	Leisure Facilities
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]
Floor	1%	1%	1%
Spread Above Index	7.50%	6.49%	7.50%
Interest Rate	12.98%	12.02%	12.98%
Acquisition Date	Sep. 06, 2019	Sep. 06, 2019
Maturity Date	Sep. 06, 2024	Sep. 06, 2024	Sep. 06, 2024
Principal/Share Amount	$ 11,788	$ 9,441
Investments, amortized cost	11,736	9,375
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 10,023	$ 9,347
Percent of net assets	3.20%	3%	3.20%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: ITS Buyer Inc. First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ITSBuyerIncMember	whfcl:ITSBuyerIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6%	5.50%	6%
Interest Rate	11.09%	11.11%	11.09%
Acquisition Date	Feb. 17, 2022	Feb. 17, 2022
Maturity Date	Jun. 15, 2026	Jun. 15, 2026	Jun. 15, 2026
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 4
Investment, Identifier [Axis]: ITS Buyer Inc. First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ITSBuyerIncMember	whfcl:ITSBuyerIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6%	5.50%	6%
Interest Rate	11.09%	11.11%	11.09%
Acquisition Date	Feb. 17, 2022	Feb. 17, 2022
Maturity Date	Jun. 15, 2026	Jun. 15, 2026	Jun. 15, 2026
Investment owned shares | shares		3,541
Principal/Share Amount	$ 3,326
Investments, amortized cost	3,297	$ 3,503
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 3,319	$ 3,504
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:ImageOneIndustriesLLCMember	whfcl:ImageOneIndustriesLLCMember
Investment, Type [Extensible Enumeration]	whfcl:CommonAUnitsMember	whfcl:CommonAUnitsMember	whfcl:CommonAUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Support Services	Diversified Support Services	Diversified Support Services
Acquisition Date	Sep. 20, 2019	Sep. 20, 2019
Principal/Share Amount	$ 151	$ 149
Investments, amortized cost	8	7
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 9	$ 9
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:IndustrialSpecialtyServicesUSALLCMember	whfcl:IndustrialSpecialtyServicesUSALLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	7.75%	6.75%	7.75%
Interest Rate	13.23%	12.25%	13.23%
Investment, interest rate, paid in cash	12.23%		12.23%
PIK interest rate	1%		1%
Acquisition Date	Dec. 31, 2021	Dec. 31, 2021
Maturity Date	Dec. 31, 2026	Dec. 31, 2026	Dec. 31, 2026
Principal/Share Amount	$ 10,584	$ 11,767
Investments, amortized cost	10,479	11,626
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 10,400	$ 11,537
Percent of net assets	3.30%	3.60%	3.30%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]		whfcl:JVMCHoldingsCorpMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Investment Banking & Brokerage
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6.50%
Interest Rate		11.96%
Acquisition Date		Feb. 28, 2019
Maturity Date		Feb. 28, 2024
Principal/Share Amount		$ 3,522
Investments, amortized cost		3,521
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 3,522
Percent of net assets		1.10%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
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]	whfcl:JuniperLandscapingHoldingsLLCMember	whfcl:JuniperLandscapingHoldingsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6%	6.25%	6%
Interest Rate	11.85%	11.94%	11.85%
Acquisition Date	Mar. 01, 2022	Mar. 01, 2022
Maturity Date	Dec. 29, 2026	Dec. 29, 2026	Dec. 29, 2026
Investment owned shares | shares		2,366
Principal/Share Amount	$ 2,355
Investments, amortized cost	2,334	$ 2,341
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 2,355	$ 2,342
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]	whfcl:JuniperLandscapingHoldingsLLCMember	whfcl:JuniperLandscapingHoldingsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6%	6.25%	6%
Interest Rate	11.85%	12.11%	11.85%
Acquisition Date	Mar. 01, 2022	Mar. 01, 2022
Maturity Date	Dec. 29, 2026	Dec. 29, 2026	Dec. 29, 2026
Investment owned shares | shares		199
Investments, amortized cost		$ 197
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 10	$ 193
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]	whfcl:JuniperLandscapingHoldingsLLCMember	whfcl:JuniperLandscapingHoldingsLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6%	6.25%	6%
Interest Rate	11.85%	11.86%	11.85%
Acquisition Date	Mar. 01, 2022	Mar. 01, 2022
Maturity Date	Dec. 29, 2026	Dec. 29, 2026	Dec. 29, 2026
Investment owned shares | shares		11,192
Principal/Share Amount	$ 11,135
Investments, amortized cost	11,037	$ 11,073
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 11,135	$ 11,080
Investment, Identifier [Axis]: KORE Wireless Group Inc. First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:KoreWirelessGroupIncMember	whfcl:KoreWirelessGroupIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Wireless Telecommunication Services [Member]	Wireless Telecommunication Services [Member]	Wireless Telecommunication 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]
Floor	1%	1%	1%
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.82%	11.88%	11.82%
Acquisition Date	Nov. 27, 2023	Nov. 27, 2023
Maturity Date	Nov. 09, 2028	Nov. 09, 2028	Nov. 09, 2028
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 11
Investment, Identifier [Axis]: KORE Wireless Group Inc. First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:KoreWirelessGroupIncMember	whfcl:KoreWirelessGroupIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Wireless Telecommunication Services [Member]	Wireless Telecommunication Services [Member]	Wireless Telecommunication 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]
Floor	1%	1%	1%
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.82%	11.88%	11.82%
Acquisition Date	Nov. 27, 2023	Nov. 27, 2023
Maturity Date	Nov. 09, 2028	Nov. 09, 2028	Nov. 09, 2028
Investment owned shares | shares		6,418
Principal/Share Amount	$ 6,386
Investments, amortized cost	6,270	$ 6,294
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 6,355	$ 6,295
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:KerasHoldingsLLCMember	whfcl:KerasHoldingsLLCMember
Investment, Type [Extensible Enumeration]	Common Stock [Member]	Common Stock [Member]	Common Stock [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 746	$ 683
Percent of net assets	0.20%	0.20%	0.20%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: LINC Systems, LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate11.93%, Due 02/24/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:LINCSystemsLLCMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Trading Companies And Distributors [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6.25%
Interest Rate		11.93%
Acquisition Date		Jun. 22, 2021
Maturity Date		Feb. 24, 2026
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ (1)
Investment, Identifier [Axis]: LINC Systems, LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate11.94%, Due 2/24/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:LINCSystemsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Trading Companies And Distributors [Member]		Trading Companies And 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]
Floor	1%		1%
Spread Above Index	6.25%		6.25%
Interest Rate	11.98%		11.98%
Acquisition Date	Jun. 22, 2021
Maturity Date	Feb. 24, 2026		Feb. 24, 2026
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 5
Investment, Identifier [Axis]: LINC Systems, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate11.93%, Due 02/24/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:LINCSystemsLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Trading Companies And Distributors [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6.25%
Interest Rate		11.93%
Acquisition Date		Jun. 22, 2021
Maturity Date		Feb. 24, 2026
Investment owned shares | shares		8,534
Investments, amortized cost		$ 8,454
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 8,443
Investment, Identifier [Axis]: LINC Systems, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate11.94%, Due 2/24/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:LINCSystemsLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Trading Companies And Distributors [Member]		Trading Companies And 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]
Floor	1%		1%
Spread Above Index	6.25%		6.25%
Interest Rate	11.98%		11.98%
Acquisition Date	Jun. 22, 2021
Maturity Date	Feb. 24, 2026		Feb. 24, 2026
Principal/Share Amount	$ 8,282
Investments, amortized cost	8,223
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 8,279
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]	whfcl:LMGHoldingsIncMember	whfcl:LMGHoldingsIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Electronic Equipment & Instruments	Electronic Equipment & Instruments	Electronic Equipment & Instruments
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]
Floor	1%	1%	1%
Spread Above Index	7%	6.50%	7%
Interest Rate	11.48%	12%	11.48%
Acquisition Date	Jun. 28, 2021	Jun. 28, 2021
Maturity Date	Apr. 30, 2026	Apr. 30, 2026	Apr. 30, 2026
Investment owned shares | shares		13,330
Principal/Share Amount	$ 13,261
Investments, amortized cost	13,162	$ 13,203
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 13,261	$ 13,265
Investment, Identifier [Axis]: LMG Holdings, Inc. First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:LMGHoldingsIncMember	whfcl:LMGHoldingsIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Electronic Equipment & Instruments	Electronic Equipment & Instruments	Electronic Equipment & Instruments
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]
Floor	1%	1%	1%
Spread Above Index	7%	6.50%	7%
Interest Rate	11.48%	12%	11.48%
Acquisition Date	Jun. 28, 2021	Jun. 28, 2021
Maturity Date	Apr. 30, 2026	Apr. 30, 2026	Apr. 30, 2026
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 6	$ 4
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:LSCSHoldingsIncMember	whfcl:LSCSHoldingsIncMember
Investment, Type [Extensible Enumeration]	whfcl:SecondLienSecuredTermLoanMember	whfcl:SecondLienSecuredTermLoanMember	whfcl:SecondLienSecuredTermLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Life Sciences Tools & Services	Life Sciences Tools & Services	Life Sciences Tools & 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]
Floor	0.50%	0.50%	0.50%
Spread Above Index	8%	8%	8%
Interest Rate	13.46%	13.47%	13.46%
Acquisition Date	Nov. 23, 2021	Nov. 23, 2021
Maturity Date	Dec. 16, 2029	Dec. 16, 2029	Dec. 16, 2029
Principal/Share Amount	$ 5,000	$ 5,000
Investments, amortized cost	4,949	4,944
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 5,002	$ 4,901
Percent of net assets	1.60%	1.50%	1.60%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:LabLogisticsLLCMember	whfcl:LabLogisticsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor	1%	1%	1%
Spread Above Index	7.25%	7.25%	7.25%
Interest Rate	12.69%	12.71%	12.69%
Acquisition Date	Oct. 16, 2019	Oct. 16, 2019
Maturity Date	Dec. 31, 2025	Sep. 25, 2024	Dec. 31, 2025
Principal/Share Amount	$ 5,062	$ 5,090
Investments, amortized cost	5,062	5,089
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 5,062	$ 5,090
Percent of net assets	1.60%	1.60%	1.60%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:LabLogisticsLLCMember	whfcl:LabLogisticsLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor	1%	1%	1%
Spread Above Index	7.25%	7.25%	7.25%
Interest Rate	12.69%	12.71%	12.69%
Acquisition Date	Oct. 16, 2019	Oct. 16, 2019
Maturity Date	Dec. 31, 2025	Sep. 25, 2024	Dec. 31, 2025
Principal/Share Amount	$ 5,422	$ 5,449
Investments, amortized cost	5,420	5,442
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 5,422	$ 5,449
Percent of net assets	1.70%	1.70%	1.70%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:LeviathanIntermediateHoldcoLlcMember	whfcl:LeviathanIntermediateHoldcoLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1.50%	1.50%	1.50%
Spread Above Index	7.50%	7.50%	7.50%
Interest Rate	12.98%	13%	12.98%
Acquisition Date	Dec. 27, 2022	Dec. 27, 2022
Maturity Date	Dec. 27, 2027	Dec. 27, 2027	Dec. 27, 2027
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 12	$ 14
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:LeviathanIntermediateHoldcoLlcMember	whfcl:LeviathanIntermediateHoldcoLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1.50%	1.50%	1.50%
Spread Above Index	7.50%	7.50%	7.50%
Interest Rate	12.98%	13%	12.98%
Acquisition Date	Dec. 27, 2022	Dec. 27, 2022
Maturity Date	Dec. 27, 2027	Dec. 27, 2027	Dec. 27, 2027
Principal/Share Amount	$ 13,278	$ 10,346
Investments, amortized cost	13,009	10,098
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 13,411	$ 10,346
Percent of net assets	4.30%	3.30%	4.30%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:LiftBrandsIncMember	whfcl:LiftBrandsIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredTermLoanAMember	whfcl:FirstLienSecuredTermLoanAMember	whfcl:FirstLienSecuredTermLoanAMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Leisure Facilities	Leisure Facilities	Leisure Facilities
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]
Floor	1%	1%	1%
Spread Above Index	7.50%	7.50%	7.50%
Interest Rate	12.94%	12.96%	12.94%
Acquisition Date	Jun. 29, 2020	Jun. 29, 2020
Maturity Date	Jun. 29, 2025	Jun. 29, 2025	Jun. 29, 2025
Principal/Share Amount	$ 5,489	$ 5,518
Investments, amortized cost	5,472	5,492
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 5,489	$ 5,457
Percent of net assets	1.80%	1.70%	1.80%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:LiftBrandsIncMember	whfcl:LiftBrandsIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredTermLoanBMember	whfcl:FirstLienSecuredTermLoanBMember	whfcl:FirstLienSecuredTermLoanBMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Leisure Facilities	Leisure Facilities	Leisure Facilities
Spread Above Index	9.50%	9.50%	9.50%
PIK interest rate	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
Principal/Share Amount	$ 1,519	$ 1,450
Investments, amortized cost	1,514	1,441
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,519	$ 1,406
Percent of net assets	0.50%	0.40%	0.50%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:LuxuryBrandHoldingsIncMember	whfcl:LuxuryBrandHoldingsIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Broadline Retail	Broadline Retail	Broadline Retail
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]
Floor	1%	1%	1%
Spread Above Index	5.75%	6.50%	5.75%
Interest Rate	11.09%	11.96%	11.09%
Acquisition Date	Dec. 04, 2020	Dec. 04, 2020
Maturity Date	Jun. 04, 2026	Jun. 04, 2026	Jun. 04, 2026
Principal/Share Amount	$ 4,580	$ 5,280
Investments, amortized cost	4,548	5,233
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 4,580	$ 5,280
Percent of net assets	1.50%	1.70%	1.50%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: M&M OpCo. LLC (d/b/a Escalent, 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
Investment, Issuer Name [Extensible Enumeration]	M&M OpCo. LLC (d/b/a Escalent, Inc.)	M&M OpCo. LLC (d/b/a Escalent, Inc.)
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising	Advertising	Advertising
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]
Floor	1%	1%	1%
Spread Above Index	8%	8%	8%
Interest Rate	13.43%	13.45%	13.43%
Acquisition Date	Apr. 07, 2023	Apr. 07, 2023
Maturity Date	Apr. 09, 2029	Apr. 09, 2029	Apr. 09, 2029
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 6	$ (1)
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: M&M OpCo. LLC (d/b/a Escalent, 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
Investment, Issuer Name [Extensible Enumeration]	M&M OpCo. LLC (d/b/a Escalent, Inc.)	M&M OpCo. LLC (d/b/a Escalent, Inc.)
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising	Advertising	Advertising
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]
Floor	1%	1%	1%
Spread Above Index	8%	8%	8%
Interest Rate	13.43%	13.45%	13.43%
Acquisition Date	Apr. 07, 2023	Apr. 07, 2023
Maturity Date	Apr. 09, 2029	Apr. 09, 2029	Apr. 09, 2029
Principal/Share Amount	$ 4,702	$ 4,726
Investments, amortized cost	4,590	4,602
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 4,702	$ 4,580
Percent of net assets	1.50%	1.40%	1.50%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:MbsHighwayLlcMember	whfcl:MbsHighwayLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	7.50%	7.50%	7.50%
Interest Rate	13.06%	13.18%	13.06%
Acquisition Date	Oct. 13, 2022	Oct. 13, 2022
Maturity Date	Oct. 13, 2027	Oct. 13, 2027	Oct. 13, 2027
Principal/Share Amount	$ 9,334	$ 9,381
Investments, amortized cost	9,181	9,204
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 9,190	$ 9,089
Percent of net assets	2.90%	2.90%	2.90%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: MGT Merger Target, LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MgtMergerTargetLlcMember	whfcl:MgtMergerTargetLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	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
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]
Floor	1%	1%	1%
Spread Above Index	6.11%	6.50%	6.11%
Interest Rate	11.54%	11.98%	11.54%
Acquisition Date	May 10, 2023	May 10, 2023
Maturity Date	Apr. 10, 2029	Apr. 10, 2029	Apr. 10, 2029
Investment owned shares | shares		392
Principal/Share Amount	$ 826
Investments, amortized cost	807	$ 378
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 822	$ 389
Investment, Identifier [Axis]: MGT Merger Target, LLC First lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MgtMergerTargetLlcMember	whfcl:MgtMergerTargetLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	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
Investment, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:PrimeRateMember	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]	us-gaap:PrimeRateMember
Floor	1%	1%	1%
Spread Above Index	6.39%	6.50%	6.39%
Interest Rate	11.82%	11.98%	11.82%
Acquisition Date	May 10, 2023	May 10, 2023
Maturity Date	Apr. 10, 2028	Apr. 10, 2028	Apr. 10, 2028
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 15	$ 11
Investment, Identifier [Axis]: MGT Merger Target, LLC First lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MgtMergerTargetLlcMember	whfcl:MgtMergerTargetLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	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
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]
Floor	1%	1%	1%
Spread Above Index	6.39%	6.50%	6.39%
Interest Rate	11.82%	11.98%	11.82%
Acquisition Date	May 10, 2023	May 10, 2023
Maturity Date	Apr. 10, 2029	Apr. 10, 2029	Apr. 10, 2029
Investment owned shares | shares		6,247
Principal/Share Amount	$ 7,242
Investments, amortized cost	7,076	$ 6,084
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 7,288	$ 6,194
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:MSIInformationServicesIncMember	whfcl:MSIInformationServicesIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Interactive Media & Services	Interactive Media & Services	Interactive Media & Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Base Rate [Member]	Base Rate [Member]	Base Rate [Member]
Floor	1%	1%	1%
Spread Above Index	6.84%	6.84%	6.84%
Interest Rate	15.06%	15.06%	15.06%
Acquisition Date	Apr. 25, 2022	Apr. 25, 2022
Maturity Date	Apr. 24, 2026	Apr. 24, 2026	Apr. 24, 2026
Principal/Share Amount	$ 825	$ 825
Investments, amortized cost	818	815
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 690	$ 776
Percent of net assets	0.20%	0.20%	0.20%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:MSIInformationServicesIncMember	whfcl:MSIInformationServicesIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	7.75%	7.75%	7.75%
Interest Rate	13.25%	13.29%	13.25%
Acquisition Date	Apr. 25, 2022	Apr. 25, 2022
Maturity Date	Apr. 24, 2026	Apr. 24, 2026	Apr. 24, 2026
Principal/Share Amount	$ 7,333	$ 7,333
Investments, amortized cost	7,266	7,248
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 6,376	$ 6,972
Percent of net assets	2%	2.20%	2%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:ManchesterAcquisitionSubLLCMember	whfcl:ManchesterAcquisitionSubLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	0.75%	0.75%	0.75%
Spread Above Index	5.75%	5.75%	5.75%
Interest Rate	11.25%	11.28%	11.25%
Acquisition Date	Nov. 16, 2021	Nov. 16, 2021
Maturity Date	Dec. 01, 2026	Dec. 01, 2026	Dec. 01, 2026
Principal/Share Amount	$ 1,167	$ 7,840
Investments, amortized cost	1,136	7,587
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,099	$ 7,215
Percent of net assets	0.40%	2.30%	0.40%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Marlin DTC-LS Midco 2, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.99%, Due 7/1/2025
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:MarlinDTC-LSMidco2LLCMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Broadline Retail
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6.50%
Interest Rate		11.99%
Acquisition Date		Jul. 19, 2019
Maturity Date		Jul. 01, 2025
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ (3)
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]	whfcl:MarlinDTC-LSMidco2LLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	whfcl:InternetAndDirectMarketingRetailMember		whfcl:InternetAndDirectMarketingRetailMember
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]
Floor	1%		1%
Spread Above Index	6.50%		6.50%
Interest Rate	11.92%		11.92%
Acquisition Date	Jul. 19, 2019
Maturity Date	Jul. 01, 2025		Jul. 01, 2025
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1
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]	whfcl:MarlinDTC-LSMidco2LLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	whfcl:InternetAndDirectMarketingRetailMember		whfcl:InternetAndDirectMarketingRetailMember
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]
Floor	1%		1%
Spread Above Index	6.50%		6.50%
Interest Rate	11.92%		11.92%
Acquisition Date	Jul. 19, 2019
Maturity Date	Jul. 01, 2025		Jul. 01, 2025
Principal/Share Amount	$ 18,810
Investments, amortized cost	18,737
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 18,758
Investment, Identifier [Axis]: Marlin DTC-LS Midco 2., First Lien Secured Term, Floor 1.00%, Spread L plus 6.50%, Rate 11.99%, Due 7/1/25
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:MarlinDTC-LSMidco2LLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Broadline Retail
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6.50%
Interest Rate		11.99%
Acquisition Date		Jul. 19, 2019
Maturity Date		Jul. 01, 2025
Investment owned shares | shares		18,908
Investments, amortized cost		$ 18,798
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 18,762
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:MaxSolutionsIncMember	whfcl:MaxSolutionsIncMember
Investment, Type [Extensible Enumeration]	Common Stock [Member]	Common Stock [Member]	Common Stock [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Paper Packaging	Paper & Plastic Packaging Products & Materials	Paper Packaging
Acquisition Date	Sep. 29, 2022	Sep. 29, 2022
Principal/Share Amount	$ 4	$ 4
Investments, amortized cost	400	400
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 61	$ 179
Percent of net assets		0.10%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Max Solutions, Inc., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus 7.66%, Rate 13.15%, Due 9/29/28
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:MaxSolutionsIncMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Paper & Plastic Packaging Products & Materials
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		7.66%
Interest Rate		13.15%
Acquisition Date		Oct. 07, 2022
Maturity Date		Sep. 29, 2028
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ (17)
Investment, Identifier [Axis]: Max Solutions, Inc., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 7.66%, Rate 13.15%, Due 9/29/28
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:MaxSolutionsIncMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Paper & Plastic Packaging Products & Materials
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		7.66%
Interest Rate		13.15%
Acquisition Date		Oct. 07, 2022
Maturity Date		Sep. 29, 2028
Investment owned shares | shares		6,589
Investments, amortized cost		$ 6,485
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 6,488
Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus 7.66%, Rate 13.20%, Due 9/29/28
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MaxSolutionsIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	8.26%		8.26%
Interest Rate	13.71%		13.71%
Acquisition Date	Oct. 07, 2022
Maturity Date	Sep. 29, 2028		Sep. 29, 2028
Principal/Share Amount	$ 416
Investments, amortized cost	413
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 396
Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 7.66%, Rate 13.15%, Due 9/29/28
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:MaxSolutionsIncMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Paper & Plastic Packaging Products & Materials
Investment, Variable Interest Rate, Type [Extensible Enumeration]		whfcl:CanadianDollarOfferedRateMember
Floor		1%
Spread Above Index		7.66%
Interest Rate		13.15%
Acquisition Date		Oct. 07, 2022
Maturity Date		Sep. 29, 2028
Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 7.66%, Rate 13.20%, Due 9/29/28
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MaxSolutionsIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Paper Packaging		Paper Packaging
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:CanadianDollarOfferedRateMember		whfcl:CanadianDollarOfferedRateMember
Floor	1%		1%
Spread Above Index	8.26%		8.26%
Interest Rate	13.71%		13.71%
Acquisition Date	Oct. 07, 2022
Maturity Date	Sep. 29, 2028		Sep. 29, 2028
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ (6)
Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 7.66%, Rate 13.20%, Due 9/29/28
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MaxSolutionsIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	8.28%		8.28%
Interest Rate	13.72%		13.72%
Acquisition Date	Oct. 07, 2022
Maturity Date	Sep. 29, 2028		Sep. 29, 2028
Principal/Share Amount	$ 6,556
Investments, amortized cost	6,463
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 6,231
Investment, Identifier [Axis]: Maxor Acquisition, Inc. First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MaxorAcquisitionInc.Member	whfcl:MaxorAcquisitionInc.Member
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Drug Retail	Drug Retail	Drug Retail
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]
Floor	1%	1%	1%
Spread Above Index	6.75%	6.75%	6.75%
Interest Rate	12.29%	12.48%	12.29%
Acquisition Date	Apr. 11, 2023	Apr. 11, 2023
Maturity Date	Mar. 01, 2029	Mar. 01, 2029	Mar. 01, 2029
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 11	$ 9
Investment, Identifier [Axis]: Maxor Acquisition, Inc. First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MaxorAcquisitionInc.Member	whfcl:MaxorAcquisitionInc.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Drug Retail	Drug Retail	Drug Retail
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]
Floor	1%	1%	1%
Spread Above Index	6.75%	6.75%	6.75%
Interest Rate	12.29%	12.48%	12.29%
Acquisition Date	Apr. 11, 2023	Apr. 11, 2023
Maturity Date	Mar. 01, 2029	Mar. 01, 2029	Mar. 01, 2029
Investment owned shares | shares		5,053
Principal/Share Amount	$ 5,027
Investments, amortized cost	4,910	$ 4,922
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 5,078	$ 5,013
Investment, Identifier [Axis]: Medical Device Inc First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MedicalDeviceIncMember	whfcl:MedicalDeviceIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Health Care Supplies	Health Care Supplies	Health Care Supplies
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]
Floor	1.25%	1%	1.25%
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.93%	11.95%	11.93%
Acquisition Date	Jul. 27, 2023	Jul. 27, 2023
Maturity Date	Jul. 11, 2029	Jul. 11, 2029	Jul. 11, 2029
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 5	$ 3
Investment, Identifier [Axis]: Medical Device Inc First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MedicalDeviceIncMember	whfcl:MedicalDeviceIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Health Care Supplies	Health Care Supplies	Health Care Supplies
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]
Floor	1.25%	1%	1.25%
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.93%	11.95%	11.93%
Acquisition Date	Jul. 27, 2023	Jul. 27, 2023
Maturity Date	Jul. 11, 2029	Jul. 11, 2029	Jul. 11, 2029
Investment owned shares | shares		2,660
Principal/Share Amount	$ 2,647
Investments, amortized cost	2,591	$ 2,599
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 2,633	$ 2,626
Investment, Identifier [Axis]: Merriman Holdings LP (d/b/a Escalent, 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:MerrimanHoldingsLPMember	whfcl:MerrimanHoldingsLPMember
Investment, Type [Extensible Enumeration]	whfcl:ClassAUnitsMember	whfcl:ClassAUnitsMember	whfcl:ClassAUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising	Advertising	Advertising
Acquisition Date	Apr. 07, 2023	Apr. 07, 2023
Principal/Share Amount	$ 327	$ 327
Investments, amortized cost	333	333
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 341	$ 295
Percent of net assets	0.10%	0.10%	0.10%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 11.42%, Due 11/20/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MetaBuyerLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	6%		6%
Interest Rate	11.39%		11.39%
Acquisition Date	Dec. 16, 2021
Maturity Date	Nov. 01, 2027		Nov. 01, 2027
Principal/Share Amount	$ 878
Investments, amortized cost	868
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 878
Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 11.56%, Due 11/01/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:MetaBuyerLLCMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Pharmaceuticals [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6%
Interest Rate		11.56%
Acquisition Date		Dec. 16, 2021
Maturity Date		Nov. 01, 2027
Investment owned shares | shares		883
Investments, amortized cost		$ 871
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 883
Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Term Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 11.43%, Due 11/20/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MetaBuyerLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	6%		6%
Interest Rate	11.43%		11.43%
Acquisition Date	Dec. 16, 2021
Maturity Date	Nov. 01, 2027		Nov. 01, 2027
Principal/Share Amount	$ 967
Investments, amortized cost	956
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 967
Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Term Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 11.46%, Due 11/01/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:MetaBuyerLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Pharmaceuticals [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6%
Interest Rate		11.46%
Acquisition Date		Dec. 16, 2021
Maturity Date		Nov. 01, 2027
Investment owned shares | shares		971
Investments, amortized cost		$ 959
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 971
Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Term Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 9.65%, Due 11/20/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MetaBuyerLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Pharmaceuticals [Member]		Pharmaceuticals [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:EuroInterbankOfferedRateMember		whfcl:EuroInterbankOfferedRateMember
Floor	1%		1%
Spread Above Index	6%		6%
Interest Rate	9.61%		9.61%
Acquisition Date	Dec. 16, 2021
Maturity Date	Nov. 01, 2027		Nov. 01, 2027
Principal/Share Amount	$ 12,101
Investments, amortized cost	13,501
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 12,960
Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Term Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 9.87%, Due 11/01/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:MetaBuyerLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Pharmaceuticals [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		whfcl:EuroInterbankOfferedRateMember
Floor		1%
Spread Above Index		6%
Interest Rate		9.87%
Acquisition Date		Dec. 16, 2021
Maturity Date		Nov. 01, 2027
Investment owned shares | shares		12,163
Investments, amortized cost		$ 13,552
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 13,401
Investment, Identifier [Axis]: Meta Buyer LLC.,First Lien Secured Revolving Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 11.53%, Due 11/01/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:MetaBuyerLLCMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Pharmaceuticals [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6%
Interest Rate		11.53%
Acquisition Date		Dec. 16, 2021
Maturity Date		Nov. 01, 2027
Investment owned shares | shares		1,156
Investments, amortized cost		$ 1,141
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 1,161
Investment, Identifier [Axis]: Meta Buyer LLC.,First Lien Secured Revolving Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 12.11%, Due 11/20/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MetaBuyerLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	6%		6%
Interest Rate	11.37%		11.37%
Acquisition Date	Dec. 16, 2021
Maturity Date	Nov. 01, 2027		Nov. 01, 2027
Principal/Share Amount	$ 1,156
Investments, amortized cost	1,143
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,160
Investment, Identifier [Axis]: Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC) First Lien Secured Bridge 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
Investment, Issuer Name [Extensible Enumeration]	Midwest Texas Tea CA, LLC [Member]	Midwest Texas Tea CA, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredBridgeLoanMember	whfcl:FirstLienSecuredBridgeLoanMember	whfcl:FirstLienSecuredBridgeLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	14%	14%	14%
Interest Rate	19.44%	19.46%	19.44%
Investment, interest rate, paid in cash	13.44%	13.46%	13.44%
PIK interest rate	6%	6%	6%
Acquisition Date	Dec. 22, 2023	Dec. 22, 2023
Maturity Date	Dec. 22, 2025	Dec. 22, 2025	Dec. 22, 2025
Principal/Share Amount	$ 1,510	$ 1,464
Investments, amortized cost	1,478	1,420
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,534	$ 1,420
Percent of net assets	0.50%	0.40%	0.50%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, 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
Investment, Issuer Name [Extensible Enumeration]	Midwest Texas Tea CA, LLC [Member]	Midwest Texas Tea CA, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	7.25%	7.25%	7.25%
Interest Rate	12.69%	12.71%	12.69%
Acquisition Date	Dec. 22, 2023	Dec. 22, 2023
Maturity Date	Dec. 22, 2028	Dec. 22, 2028	Dec. 22, 2028
Principal/Share Amount	$ 403
Investments, amortized cost	394
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 403
Percent of net assets	0.10%		0.10%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, 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
Investment, Issuer Name [Extensible Enumeration]	Midwest Texas Tea CA, LLC [Member]	Midwest Texas Tea CA, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	7.25%	7.25%	7.25%
Interest Rate	12.69%	12.71%	12.69%
Acquisition Date	Dec. 22, 2023	Dec. 22, 2023
Maturity Date	Dec. 22, 2028	Dec. 22, 2028	Dec. 22, 2028
Principal/Share Amount	$ 267
Investments, amortized cost	261
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 269
Percent of net assets	0.10%		0.10%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, 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
Investment, Issuer Name [Extensible Enumeration]	Midwest Texas Tea CA, LLC [Member]	Midwest Texas Tea CA, LLC [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	7.25%	7.25%	7.25%
Interest Rate	12.69%	12.71%	12.69%
Acquisition Date	Dec. 22, 2023	Dec. 22, 2023
Maturity Date	Dec. 22, 2028	Dec. 22, 2028	Dec. 22, 2028
Principal/Share Amount	$ 9,490	$ 9,490
Investments, amortized cost	9,278	9,254
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 9,411	$ 9,254
Percent of net assets	3%	2.90%	3%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Monarch Collective 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
Investment, Issuer Name [Extensible Enumeration]	Monarch Collective Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Real Estate Services		Real Estate 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]
Floor	1.50%		1.50%
Spread Above Index	6.75%		6.75%
Interest Rate	12.08%		12.08%
Acquisition Date	Jan. 10, 2024
Maturity Date	Jan. 10, 2029		Jan. 10, 2029
Principal/Share Amount	$ 872
Investments, amortized cost	860
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 860
Percent of net assets	0.30%		0.30%
Investment, Restriction Status [true false]	true		true
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: Monarch Collective 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
Investment, Issuer Name [Extensible Enumeration]	Monarch Collective Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Real Estate Services		Real Estate 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]
Floor	1.50%		1.50%
Spread Above Index	6.75%		6.75%
Interest Rate	12.08%		12.08%
Acquisition Date	Jan. 10, 2024
Maturity Date	Jan. 10, 2029		Jan. 10, 2029
Principal/Share Amount	$ 9,353
Investments, amortized cost	9,140
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 9,223
Percent of net assets	2.90%		2.90%
Investment, Restriction Status [true false]	true		true
Investment, Non-income Producing [true false]	false		false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:MotivationalCIVLLCMember	whfcl:MotivationalCIVLLCMember
Investment, Type [Extensible Enumeration]	whfcl:ClassBUnitsMember	whfcl:ClassBUnitsMember	whfcl:ClassBUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:MotivationalMarketingLLCMember	whfcl:MotivationalMarketingLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	9.25%	7.25%	9.25%
Interest Rate	14.69%	12.71%	14.69%
Investment, interest rate, paid in cash	13.94%	11.96%	13.94%
PIK interest rate	0.75%	0.75%	0.75%
Acquisition Date	Jul. 12, 2021	Jul. 12, 2021
Maturity Date	Jul. 12, 2026	Jul. 12, 2026	Jul. 12, 2026
Principal/Share Amount	$ 1,182	$ 473
Investments, amortized cost	1,172	468
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,034	$ 338
Percent of net assets	0.30%	0.10%	0.30%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:MotivationalMarketingLLCMember	whfcl:MotivationalMarketingLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	9.25%	7.25%	9.25%
Interest Rate	14.69%	12.71%	14.69%
Investment, interest rate, paid in cash	13.94%	11.96%	13.94%
PIK interest rate	0.75%	0.75%	0.75%
Acquisition Date	Jul. 12, 2021	Jul. 12, 2021
Maturity Date	Jul. 12, 2026	Jul. 12, 2026	Jul. 12, 2026
Principal/Share Amount	$ 10,031	$ 9,989
Investments, amortized cost	9,950	9,888
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 8,776	$ 8,790
Percent of net assets	2.90%	2.80%	2.90%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:NNAServicesLLCMember	whfcl:NNAServicesLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Support Services	Diversified Support Services	Diversified Support 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]
Floor	1%	1%	1%
Spread Above Index	7.25%	6.75%	7.25%
Interest Rate	12.73%	12.25%	12.73%
Acquisition Date	Aug. 27, 2021	Aug. 27, 2021
Maturity Date	Aug. 27, 2026	Aug. 27, 2026	Aug. 27, 2026
Principal/Share Amount	$ 9,271	$ 9,417
Investments, amortized cost	9,221	9,354
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 9,270	$ 9,293
Percent of net assets	3%	2.90%	3%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.92%, Due 1/21/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:NPAVLessorCorp.Member
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	6%		6%
Interest Rate	11.94%		11.94%
Acquisition Date	Mar. 01, 2022
Maturity Date	Jan. 21, 2027		Jan. 21, 2027
Principal/Share Amount	$ 725
Investments, amortized cost	718
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 645
Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.96%, Due 1/21/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:NPAVLessorCorp.Member
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Services [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6.50%
Interest Rate		11.96%
Acquisition Date		Mar. 01, 2022
Maturity Date		Jan. 21, 2027
Investment owned shares | shares		725
Investments, amortized cost		$ 716
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 647
Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.92%, Due 1/21/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:NPAVLessorCorp.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	6%		6%
Interest Rate	11.94%		11.94%
Acquisition Date	Mar. 01, 2022
Maturity Date	Jan. 21, 2027		Jan. 21, 2027
Principal/Share Amount	$ 6,502
Investments, amortized cost	6,435
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 5,785
Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.96%, Due 1/21/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:NPAVLessorCorp.Member
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Services [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6.50%
Interest Rate		11.96%
Acquisition Date		Mar. 01, 2022
Maturity Date		Jan. 21, 2027
Investment owned shares | shares		7,510
Investments, amortized cost		$ 7,418
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 6,706
Investment, Identifier [Axis]: Naviga 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:NavigaIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	5%		5%
Interest Rate	10.44%		10.44%
Acquisition Date	May 14, 2024
Maturity Date	Jul. 31, 2024		Jul. 31, 2024
Principal/Share Amount	$ 94
Investments, amortized cost	93
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 93
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	false		false
Investment, Non-income Producing [true false]	false		false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:NavigaIncMember	whfcl:NavigaIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Application Software	Application Software	Application Software
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Base Rate [Member]	Base Rate [Member]	Base Rate [Member]
Floor	1%	1%	1%
Spread Above Index	6.84%	6.84%	6.84%
Interest Rate	12.78%	12.78%	12.78%
Acquisition Date	Jun. 14, 2019	Jun. 14, 2019
Maturity Date	Jun. 28, 2024	Feb. 27, 2024	Jun. 28, 2024
Principal/Share Amount	$ 301	$ 271
Investments, amortized cost	301	271
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 192	$ 268
Percent of net assets	0.10%	0.10%	0.10%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:NavigaIncMember	whfcl:NavigaIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	7%	7%	7%
Interest Rate	12.40%	12.45%	12.40%
Acquisition Date	Jun. 14, 2019	Jun. 14, 2019
Maturity Date	Jun. 28, 2024	Feb. 27, 2024	Jun. 28, 2024
Principal/Share Amount	$ 3,140	$ 3,148
Investments, amortized cost	3,140	3,148
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 2,003	$ 3,113
Percent of net assets	0.60%	1%	0.60%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: New American Crafts Holdings, LLC Class A Units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Controlled affiliate company investments	Non-controlled/non-affiliate company investments	Controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:NewAmericanCraftsHoldingsLlcClassaUnitsMember	whfcl:NewAmericanCraftsHoldingsLlcMember
Investment, Type [Extensible Enumeration]	whfcl:ClassAUnitsMember	whfcl:ClassAUnitsMember	whfcl:ClassAUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Office Services & Supplies	Office Services & Supplies	Office Services & Supplies
Acquisition Date	Mar. 16, 2023	Mar. 16, 2023
Principal/Share Amount	$ 1	$ 1
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Panos Brands, Llc [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	5.75%		5.75%
Interest Rate	11.07%		11.07%
Acquisition Date	Jun. 14, 2024
Maturity Date	May 14, 2029		May 14, 2029
Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Revolving Loan One
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Controlled affiliate company investments		Controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Panos Brands, Llc [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	5.75%		5.75%
Interest Rate	11.07%		11.07%
Acquisition Date	May 14, 2024
Maturity Date	May 14, 2029		May 14, 2029
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	false		false
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Panos Brands, Llc [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	5.75%		5.75%
Interest Rate	11.07%		11.07%
Acquisition Date	Jun. 14, 2024
Maturity Date	May 14, 2029		May 14, 2029
Principal/Share Amount	$ 4,543
Investments, amortized cost	4,454
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 4,454
Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Term Loan One
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Controlled affiliate company investments		Controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Panos Brands, Llc [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	5.75%		5.75%
Interest Rate	11.07%		11.07%
Acquisition Date	May 14, 2024
Maturity Date	May 14, 2029		May 14, 2029
Principal/Share Amount	$ 4,088
Investments, amortized cost	4,009
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 4,009
Percent of net assets	1.30%		1.30%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	false		false
Investment, Non-income Producing [true false]	false		false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:PFBHoldcoIncMember
Investment, Type [Extensible Enumeration]	whfcl:ClassAUnitsMember		whfcl:ClassAUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Building Products		Building Products
Acquisition Date	Dec. 17, 2021
Principal/Share Amount			$ 1
Investments, amortized cost	$ 423
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,034
Percent of net assets	0.30%		0.30%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: PFB Holding Company, LLC (d/b/a PFB Corporation) Class A Units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]		whfcl:PfbHoldingCompanyLlcMember
Investment, Type [Extensible Enumeration]		whfcl:ClassAUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Building Products
Acquisition Date		Dec. 17, 2021
Principal/Share Amount		$ 1
Investments, amortized cost		423
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 1,053
Percent of net assets		0.30%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
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
Investment, Issuer Name [Extensible Enumeration]		whfcl:PGDentalNewJerseyParentLLCMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Health Care Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Base Rate [Member]
Floor		1%
Spread Above Index		7%
Interest Rate		13.98%
Investment, interest rate, paid in cash		11.73%
PIK interest rate		2.25%
Acquisition Date		Nov. 25, 2020
Maturity Date		Nov. 25, 2025
Principal/Share Amount		$ 704
Investments, amortized cost		698
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 704
Percent of net assets		0.20%
Investment, Restriction Status [true false]		true
Investment, Non-income Producing [true false]		false
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
Investment, Issuer Name [Extensible Enumeration]		whfcl:PGDentalNewJerseyParentLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Health Care Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		7.50%
Interest Rate		12.96%
Investment, interest rate, paid in cash		10.71%
PIK interest rate		2.25%
Acquisition Date		Nov. 25, 2020
Maturity Date		Nov. 25, 2025
Principal/Share Amount		$ 6,400
Investments, amortized cost		6,348
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 6,400
Percent of net assets		2%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
Investment, Identifier [Axis]: PLTFRM Companies, 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
Investment, Issuer Name [Extensible Enumeration]	PLTFRM Companies, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising		Advertising
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]
Floor	3%		3%
Spread Above Index	9%		9%
Interest Rate	14.33%		14.33%
Investment, interest rate, paid in cash	13.33%		13.33%
PIK interest rate	1%		1%
Acquisition Date	Jan. 29, 2024
Maturity Date	Jan. 29, 2029		Jan. 29, 2029
Principal/Share Amount	$ 713
Investments, amortized cost	694
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 705
Percent of net assets	0.20%		0.20%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: PLTFRM Companies, 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
Investment, Issuer Name [Extensible Enumeration]	PLTFRM Companies, LLC [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising		Advertising
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]
Floor	3%		3%
Spread Above Index	9%		9%
Interest Rate	14.34%		14.34%
Investment, interest rate, paid in cash	13.34%		13.34%
PIK interest rate	1%		1%
Acquisition Date	Jan. 29, 2024
Maturity Date	Jan. 29, 2029		Jan. 29, 2029
Principal/Share Amount	$ 7,948
Investments, amortized cost	7,730
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 7,831
Percent of net assets	2.60%		2.60%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false		false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:PatagoniaHoldcoLLCMember	whfcl:PatagoniaHoldcoLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	0.50%	0.50%	0.50%
Spread Above Index	5.75%	5.75%	5.75%
Interest Rate	11.07%	11.12%	11.07%
Acquisition Date	Aug. 05, 2022	Aug. 05, 2022
Maturity Date	Aug. 01, 2029	Aug. 01, 2029	Aug. 01, 2029
Principal/Share Amount	$ 14,369	$ 14,442
Investments, amortized cost	12,480	12,357
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 13,621	$ 13,191
Percent of net assets	4.40%	4.20%	4.40%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Pavement Partners Interco, LLC (d/b/a Pave America, 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:PavementPartnersIntercoLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	6.75%		6.75%
Interest Rate	12.23%		12.23%
Acquisition Date	Jun. 28, 2024
Maturity Date	Feb. 07, 2028		Feb. 07, 2028
Principal/Share Amount	$ 607
Investments, amortized cost	589
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 589
Percent of net assets	0.20%		0.20%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	false		false
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: Pavement Partners Interco, LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PaveAmericaLlcMember	whfcl:PavementPartnersIntercoLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6.75%	6.75%	6.75%
Interest Rate	12.22%	12.42%	12.22%
Acquisition Date	Mar. 17, 2023	Mar. 17, 2023
Maturity Date	Feb. 07, 2028	Feb. 07, 2028	Feb. 07, 2028
Investment owned shares | shares		575
Principal/Share Amount	$ 572
Investments, amortized cost	559	$ 560
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 575	$ 569
Investment, Identifier [Axis]: Pavement Partners Interco, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PaveAmericaLlcMember	whfcl:PavementPartnersIntercoLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6.75%	6.75%	6.75%
Interest Rate	12.22%	12.42%	12.22%
Acquisition Date	Mar. 17, 2023	Mar. 17, 2023
Maturity Date	Feb. 07, 2028	Feb. 07, 2028	Feb. 07, 2028
Principal/Share Amount	$ 307
Investments, amortized cost	300
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 311	$ 5
Investment, Identifier [Axis]: Pavement Partners Interco, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PaveAmericaLlcMember	whfcl:PavementPartnersIntercoLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6.50%	6.75%	6.50%
Interest Rate	12.22%	12.27%	12.22%
Acquisition Date	Mar. 17, 2023	Mar. 17, 2023
Maturity Date	Feb. 07, 2028	Feb. 07, 2028	Feb. 07, 2028
Investment owned shares | shares		4,455
Principal/Share Amount	$ 4,535
Investments, amortized cost	4,435	$ 4,344
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 4,556	$ 4,405
Investment, Identifier [Axis]: Pennsylvania Machine Works, LLC First Lien Secured Term Loan, SOFR 11.61
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:PennsylvaniaMachineWorksLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Industrial Machinery & Supplies & Components
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6%
Interest Rate		11.61%
Acquisition Date		Mar. 25, 2022
Maturity Date		Mar. 08, 2027
Investment owned shares | shares		6,561
Investments, amortized cost		$ 6,498
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 6,561
Investment, Identifier [Axis]: Pirtek Holdco, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PirtekHoldcoLLCMember	whfcl:PirtekHoldcoLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Support Services	Diversified Support Services	Diversified Support 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]
Floor	1%	1%	1%
Spread Above Index	5.75%	5.75%	5.75%
Interest Rate	11.04%	11.20%	11.04%
Acquisition Date	Oct. 31, 2023	Oct. 31, 2023
Maturity Date	Oct. 26, 2028	Oct. 26, 2028	Oct. 26, 2028
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 7
Investment, Identifier [Axis]: Pirtek Holdco, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PirtekHoldcoLLCMember	whfcl:PirtekHoldcoLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Support Services	Diversified Support Services	Diversified Support 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]
Floor	1%	1%	1%
Spread Above Index	5.75%	5.75%	5.75%
Interest Rate	11.04%	11.20%	11.04%
Acquisition Date	Oct. 31, 2023	Oct. 31, 2023
Maturity Date	Oct. 26, 2028	Oct. 26, 2028	Oct. 26, 2028
Investment owned shares | shares		7,500
Principal/Share Amount	$ 7,463
Investments, amortized cost	7,317	$ 7,337
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 7,367	$ 7,337
Investment, Identifier [Axis]: PlayMonster LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PlaymonsterGroupLLCMember	whfcl:PlaymonsterGroupLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,024	$ 1,363		2,977
Investment, Identifier [Axis]: Playmonster Group Equity Inc Common Equity
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PlaymonsterGroupEquityIncMember	whfcl:PlaymonsterGroupEquityIncMember
Investment, Type [Extensible Enumeration]	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]	whfcl:PlaymonsterGroupEquityIncMember	whfcl:PlaymonsterGroupEquityIncMember
Investment, Type [Extensible Enumeration]	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 affiliate company investments	Non-controlled/non-affiliate company investments	Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:PlaymonsterGroupEquityIncMember	whfcl:PlaymonsterGroupEquityIncMember
Investment, Type [Extensible Enumeration]	Common Stock [Member]	Common Stock [Member]	Common Stock [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Leisure Products	Leisure Products	Leisure Products
Acquisition Date	Jan. 24, 2022	Jan. 24, 2022
Principal/Share Amount	$ 72	$ 72
Investments, amortized cost	$ 460	$ 460
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true 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 affiliate company investments	Non-controlled/non-affiliate company investments	Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:PlaymonsterGroupEquityIncMember	whfcl:PlaymonsterGroupEquityIncMember
Investment, Type [Extensible Enumeration]	us-gaap:PreferredStockMember	us-gaap:PreferredStockMember	us-gaap:PreferredStockMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Leisure Products	Leisure Products	Leisure Products
Spread Above Index	14%	14%	14%
PIK interest rate	14%	14%	14%
Acquisition Date	Jan. 24, 2022	Jan. 24, 2022
Principal/Share Amount	$ 36	$ 36
Investments, amortized cost	$ 3,600	$ 3,600
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	true	true	true
Investment, Identifier [Axis]: Playmonster 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:PlaymonsterGroupLLCMember	whfcl:PlayMonsterLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	9%	9%	9%
PIK interest rate	14.48%	14.53%	14.48%
Acquisition Date	Jan. 24, 2022	Jan. 24, 2022
Maturity Date	Jun. 08, 2026	Jun. 08, 2026	Jun. 08, 2026
Principal/Share Amount	$ 4,548	$ 4,232
Investments, amortized cost	3,661	3,661
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,024	$ 1,363
Percent of net assets	0.30%	0.40%	0.30%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Playmonster Group LLC Priority First Lien Secured Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PlaymonsterGroupLLCMember	whfcl:PlaymonsterGroupLLCMember
Investment, Type [Extensible Enumeration]	whfcl:PriorityFirstLienSecuredTermLoanMember	whfcl:PriorityFirstLienSecuredTermLoanMember	whfcl:PriorityFirstLienSecuredTermLoanMember
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,055	$ 1,015		176
Investment, Identifier [Axis]: Playmonster Group LLC, Priority First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	us-gaap:InvestmentAffiliatedIssuerMember	Non-controlled/non-affiliate company investments	us-gaap:InvestmentAffiliatedIssuerMember
Investment, Issuer Name [Extensible Enumeration]	whfcl:PlaymonsterGroupLLCMember	whfcl:PlayMonsterLLCMember
Investment, Type [Extensible Enumeration]	whfcl:PriorityFirstLienSecuredTermLoanMember	whfcl:PriorityFirstLienSecuredTermLoanMember	whfcl:PriorityFirstLienSecuredTermLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6.75%	6.75%	6.75%
PIK interest rate	12.25%	12.37%	12.25%
Acquisition Date	Dec. 09, 2022	Dec. 09, 2022
Maturity Date	Jun. 08, 2026	Jun. 08, 2026	Jun. 08, 2026
Principal/Share Amount	$ 1,213	$ 1,140
Investments, amortized cost	1,195	1,118
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,055	$ 1,015
Percent of net assets	0.30%	0.30%	0.30%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]		whfcl:PotpourriGroupIncMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Broadline Retail
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1.50%
Spread Above Index		8.25%
Interest Rate		13.71%
Acquisition Date		Jul. 03, 2019
Maturity Date		Jul. 03, 2024
Principal/Share Amount		$ 13,799
Investments, amortized cost		13,767
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 13,799
Percent of net assets		4.40%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
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]
Interest Rate	11.44%		11.44%
Investment, Identifier [Axis]: Poultry Holdings LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.92% (11.17% Cash + 0.75% PIK), Due 6/28/25
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PoultryHoldingsLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	7.25%		7.25%
Interest Rate	11.44%		11.44%
Acquisition Date	Oct. 21, 2019
Maturity Date	Jun. 28, 2025		Jun. 28, 2025
Principal/Share Amount	$ 6,748
Investments, amortized cost	6,726
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 6,748
Investment, Identifier [Axis]: Poultry Holdings LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.96% (11.21% Cash + 0.75% PIK), Due 6/28/25
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:PoultryHoldingsLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Packaged Foods & Meats
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6.50%
Interest Rate		11.96%
Acquisition Date		Oct. 21, 2019
Maturity Date		Jun. 28, 2025
Investment owned shares | shares		6,939
Investments, amortized cost		$ 6,904
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 6,904
Investment, Identifier [Axis]: Power Service Group CR Acquisition Inc First Lien 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:PowerServiceGroupCrAcquisitionIncMember	whfcl:PowerServiceGroupCrAcquisitionIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Heavy Electrical Equipment	Heavy Electrical Equipment	Heavy Electrical Equipment
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]
Floor	1%	1%	1%
Spread Above Index	6.75%	6.75%	6.75%
Interest Rate	12.23%	12.25%	12.23%
Acquisition Date	Jul. 11, 2022	Jul. 11, 2022
Maturity Date	Jun. 25, 2026	Jun. 25, 2026	Jun. 25, 2026
Principal/Share Amount	$ 1,346	$ 1,356
Investments, amortized cost	1,330	1,336
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,359	$ 1,353
Percent of net assets	0.40%	0.40%	0.40%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Power Service Group 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:PowerServiceGroupCrAcquisitionIncMember	whfcl:PowerServiceGroupCrAcquisitionIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Heavy Electrical Equipment	Heavy Electrical Equipment	Heavy Electrical Equipment
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]
Floor	1%	1%	1%
Spread Above Index	6.75%	6.75%	6.75%
Interest Rate	12.23%	12.25%	12.23%
Acquisition Date	Jun. 25, 2021	Jun. 25, 2021
Maturity Date	Jun. 25, 2026	Jun. 25, 2026	Jun. 25, 2026
Principal/Share Amount	$ 8,732	$ 8,804
Investments, amortized cost	8,659	8,712
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 8,820	$ 8,782
Percent of net assets	2.80%	2.80%	2.80%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Pressurized Holdings, LLC Common Units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments	Non-controlled/non-affiliate company investments	Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Pressurized Holdings, LLC [Member]	Pressurized Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:CommonUnitsMember	whfcl:CommonUnitsMember	whfcl:CommonUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Chemicals	Diversified Chemicals	Diversified Chemicals
Acquisition Date	Mar. 16, 2023	Mar. 16, 2023
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Pressurized Holdings, LLC Preferred Units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled affiliate company investments	Non-controlled/non-affiliate company investments	Non-controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	Pressurized Holdings, LLC [Member]	Pressurized Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	Preferred Units [Member]	Preferred Units [Member]	Preferred Units [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Chemicals	Diversified Chemicals	Diversified Chemicals
Spread Above Index	14%		14%
PIK interest rate	14%	14%	14%
Acquisition Date	Mar. 16, 2023	Mar. 16, 2023
Investments, amortized cost	$ 4,537	$ 4,537
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 178	$ 251
Percent of net assets	0.10%	0.10%	0.10%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	true	true	true
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
Investment, Issuer Name [Extensible Enumeration]		whfcl:ProjectCastleIncMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Industrial Machinery & Supplies & Components
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		0.50%
Spread Above Index		5.50%
Interest Rate		10.89%
Acquisition Date		Jun. 09, 2022
Maturity Date		Jun. 01, 2029
Principal/Share Amount		$ 6,027
Investments, amortized cost		5,536
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 5,364
Percent of net assets		1.70%
Investment, Restriction Status [true false]		true
Investment, Non-income Producing [true false]		false
Investment, Identifier [Axis]: Quest Events, LLC Common Units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]		whfcl:QuestEventsLLCMember
Investment, Type [Extensible Enumeration]		whfcl:CommonUnitsMember
Investment, Industry Sector [Extensible Enumeration]		Diversified Support Services
Acquisition Date		Dec. 28, 2018
Principal/Share Amount		$ 317
Investments, amortized cost		360
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 305
Percent of net assets		0.10%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
Investment, Identifier [Axis]: Quest Events, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:QuestEventsLLCMember	whfcl:QuestEventsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Support Services	Diversified Support Services	Diversified Support 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]
Floor	2%	2%	2%
Spread Above Index	7%	7.25%	7%
Interest Rate	12.60%	12.86%	12.60%
Acquisition Date	Jul. 19, 2019	Jul. 19, 2019
Maturity Date	Sep. 30, 2026	Sep. 30, 2026	Sep. 30, 2026
Investment owned shares | shares		247
Principal/Share Amount	$ 247
Investments, amortized cost	246	$ 246
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 248	$ 242
Investment, Identifier [Axis]: Quest Events, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:QuestEventsLLCMember	whfcl:QuestEventsLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Support Services	Diversified Support Services	Diversified Support 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]
Floor	2%	2%	2%
Spread Above Index	7%	7.25%	7%
Interest Rate	12.60%	12.86%	12.60%
Acquisition Date	Jul. 19, 2019	Jul. 19, 2019
Maturity Date	Sep. 30, 2026	Sep. 30, 2026	Sep. 30, 2026
Investment owned shares | shares		11,709
Principal/Share Amount	$ 11,651
Investments, amortized cost	11,613	$ 11,663
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 11,651	$ 11,557
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:QuestEventsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:CommonUnitsMember		whfcl:CommonUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Support Services		Diversified Support Services
Acquisition Date	Dec. 28, 2018
Principal/Share Amount	$ 324
Investments, amortized cost	367
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 144
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: RCKC Acquisitions LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:RCKCAcquisitionsLLCMember	whfcl:RCKCAcquisitionsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	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
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]
Floor	1%	1%	1%
Spread Above Index	6.25%	6%	6.25%
Interest Rate	10.73%	11.53%	10.73%
Acquisition Date	Jan. 27, 2021	Jan. 27, 2021
Maturity Date	Jan. 02, 2029	Dec. 31, 2026	Jan. 02, 2029
Investment owned shares | shares		2,976
Principal/Share Amount	$ 2,961
Investments, amortized cost	2,934	$ 2,945
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 2,966	$ 2,965
Investment, Identifier [Axis]: RCKC Acquisitions LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:RCKCAcquisitionsLLCMember	whfcl:RCKCAcquisitionsLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	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
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]
Floor	1%	1%	1%
Spread Above Index	6.25%	6%	6.25%
Interest Rate	10.73%	11.50%	10.73%
Acquisition Date	Jan. 27, 2021	Jan. 27, 2021
Maturity Date	Jan. 02, 2029	Dec. 31, 2026	Jan. 02, 2029
Investment owned shares | shares		11,036
Principal/Share Amount	$ 10,980
Investments, amortized cost	10,885	$ 10,925
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 10,998	$ 10,993
Investment, Identifier [Axis]: RCKC Acquisitions LLC, First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:RCKCAcquisitionsLLCMember	whfcl:RCKCAcquisitionsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	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
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]
Floor	1%	1%	1%
Spread Above Index	6.25%	6%	6.25%
Interest Rate	10.73%	11.58%	10.73%
Acquisition Date	Jan. 27, 2021	Jan. 27, 2021
Maturity Date	Jan. 02, 2029	Dec. 31, 2026	Jan. 02, 2029
Investment owned shares | shares		107
Investments, amortized cost		$ 106
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 12	$ 114
Investment, Identifier [Axis]: RLJ Pro-Vac, Inc. First Lien Secured Term Loan SOFR
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:RLJPro-VacInc.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	6.25%		6.25%
Interest Rate	11.69%		11.69%
Acquisition Date	Jan. 23, 2024
Maturity Date	Dec. 31, 2026		Dec. 31, 2026
Principal/Share Amount	$ 6,692
Investments, amortized cost	6,576
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 6,610
Investment, Identifier [Axis]: Ribbon Communications Operating Company, Inc. (d/b/a Ribbon Communications 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
Investment, Issuer Name [Extensible Enumeration]	Ribbon Communications Operating Company, Inc. [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Communications Equipment		Communications Equipment
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]
Floor	1%		1%
Spread Above Index	6.25%		6.25%
Interest Rate	11.59%		11.59%
Acquisition Date	Jun. 21, 2024
Maturity Date	Jun. 21, 2029		Jun. 21, 2029
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	false		false
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: Ribbon Communications Operating Company, Inc. (d/b/a Ribbon Communications 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
Investment, Issuer Name [Extensible Enumeration]	Ribbon Communications Operating Company, Inc. [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Communications Equipment		Communications Equipment
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]
Floor	1%		1%
Spread Above Index	6.25%		6.25%
Interest Rate	11.59%		11.59%
Acquisition Date	Jun. 21, 2024
Maturity Date	Jun. 21, 2029		Jun. 21, 2029
Principal/Share Amount	$ 8,800
Investments, amortized cost	8,625
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 8,625
Percent of net assets	2.90%		2.90%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	false		false
Investment, Non-income Producing [true false]	false		false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:Ross-SimonsTopcoLPMember	whfcl:Ross-SimonsTopcoLPMember
Investment, Type [Extensible Enumeration]	Preferred Units [Member]	Preferred Units [Member]	Preferred Units [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Broadline Retail	Broadline Retail	Broadline Retail
Spread Above Index	8%	8%	8%
PIK interest rate	8%	8%	8%
Acquisition Date	Dec. 04, 2020	Dec. 04, 2020
Principal/Share Amount	$ 600	$ 600
Investments, amortized cost	514	514
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 648	$ 832
Percent of net assets	0.20%	0.30%	0.20%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:SFSGlobalHoldingCompanyMember	whfcl:SFSGlobalHoldingCompanyMember
Investment, Type [Extensible Enumeration]	Warrant [Member]	Warrant [Member]	Warrant [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:SalonRepublicHoldingsLlcMember
Investment, Type [Extensible Enumeration]	Common Stock [Member]		Common Stock [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Real Estate Operating Companies		Real Estate Operating Companies
Acquisition Date	Dec. 02, 2022
Principal/Share Amount	$ 400
Investments, amortized cost	400
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 266
Percent of net assets	0.10%		0.10%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:SalonRepublicHoldingsLlcMember	whfcl:SalonRepublicHoldingsLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	7.50%	7.50%	7.50%
Interest Rate	12.93%	12.96%	12.93%
Acquisition Date	Dec. 02, 2022	Dec. 02, 2022
Maturity Date	Dec. 02, 2027	Dec. 02, 2027	Dec. 02, 2027
Principal/Share Amount	$ 900	$ 741
Investments, amortized cost	887	729
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 945	$ 745
Percent of net assets	0.30%	0.20%	0.30%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:SalonRepublicHoldingsLlcMember	whfcl:SalonRepublicHoldingsLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	7.50%	7.50%	7.50%
Interest Rate	12.93%	12.96%	12.93%
Acquisition Date	Dec. 02, 2022	Dec. 02, 2022
Maturity Date	Dec. 02, 2027	Dec. 02, 2027	Dec. 02, 2027
Principal/Share Amount		$ 251
Investments, amortized cost		245
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 18	$ 258
Percent of net assets		0.10%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:SalonRepublicHoldingsLlcMember	whfcl:SalonRepublicHoldingsLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	7.50%	7.50%	7.50%
Interest Rate	12.94%	12.96%	12.94%
Acquisition Date	Dec. 02, 2022	Dec. 02, 2022
Maturity Date	Dec. 02, 2027	Dec. 02, 2027	Dec. 02, 2027
Principal/Share Amount	$ 5,099	$ 5,121
Investments, amortized cost	4,993	5,001
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 5,125	$ 5,077
Percent of net assets	1.60%	1.60%	1.60%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:SalonRepublicHoldingsLlcMember
Investment, Type [Extensible Enumeration]	us-gaap:PreferredStockMember		us-gaap:PreferredStockMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Real Estate Operating Companies		Real Estate Operating Companies
Spread Above Index	8%		8%
Acquisition Date	Dec. 02, 2022
Principal/Share Amount	$ 200
Investments, amortized cost	200
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 227
Percent of net assets	0.10%		0.10%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	true		true
Investment, Identifier [Axis]: Salon Republic Investments LLC Common Stock
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]		whfcl:SalonRepublicInvestmentsLlcMember
Investment, Type [Extensible Enumeration]		Common Stock [Member]
Investment, Industry Sector [Extensible Enumeration]		Real Estate Operating Companies
Acquisition Date		Dec. 02, 2022
Principal/Share Amount		$ 400
Investments, amortized cost		400
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 241
Percent of net assets		0.10%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
Investment, Identifier [Axis]: Salon Republic Investments LLC Preferred Stock
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]		whfcl:SalonRepublicInvestmentsLlcMember
Investment, Type [Extensible Enumeration]		us-gaap:PreferredStockMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Operating Companies
PIK interest rate	8%	8%	8%
Acquisition Date		Dec. 02, 2022
Principal/Share Amount		$ 200
Investments, amortized cost		200
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 218
Percent of net assets		0.10%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		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
Investment, Issuer Name [Extensible Enumeration]	whfcl:SigueCorporationMember	whfcl:SigueCorporationMember
Investment, Type [Extensible Enumeration]	Warrant [Member]	Warrant [Member]	Warrant [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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
Principal/Share Amount	$ 22	$ 22
Investments, amortized cost	$ 2,890	2,890
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 3,472
Percent of net assets		1.10%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:SleepOpCoLLCMember	whfcl:SleepOpCoLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.95%	12.07%	11.95%
Acquisition Date	Oct. 12, 2021	Oct. 12, 2021
Maturity Date	Oct. 12, 2026	Oct. 12, 2026	Oct. 12, 2026
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 24	$ 3
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:SleepOpCoLLCMember	whfcl:SleepOpCoLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.95%	12.07%	11.95%
Acquisition Date	Oct. 12, 2021	Oct. 12, 2021
Maturity Date	Oct. 12, 2026	Oct. 12, 2026	Oct. 12, 2026
Principal/Share Amount	$ 20,511	$ 20,616
Investments, amortized cost	20,322	20,385
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 20,511	$ 20,407
Percent of net assets	6.60%	6.40%	6.60%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Smalto Inc, First Lien Secured Term Loan Interest Rate 10.18
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:SmaltoInc.Member
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Household Appliances
Investment, Variable Interest Rate, Type [Extensible Enumeration]		whfcl:EuroInterbankOfferedRateMember
Floor		1%
Spread Above Index		6.25%
Interest Rate		10.18%
Acquisition Date		May 04, 2022
Maturity Date		Apr. 28, 2028
Investment owned shares | shares		6,576
Investments, amortized cost		$ 6,821
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 7,172
Investment, Identifier [Axis]: Smalto Inc, First Lien Secured Term Loan Interest Rate 10.22
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SmaltoInc.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Household Appliances		Household Appliances
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:EuroInterbankOfferedRateMember		whfcl:EuroInterbankOfferedRateMember
Floor	1%		1%
Spread Above Index	6.25%		6.25%
Interest Rate	9.97%		9.97%
Acquisition Date	May 04, 2022
Maturity Date	Apr. 28, 2028		Apr. 28, 2028
Principal/Share Amount	$ 6,423
Investments, amortized cost	6,673
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 6,879
Investment, Identifier [Axis]: Smalto Inc, First Lien Secured Term Loan Interest Rate 11.48
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SmaltoInc.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	6%		6%
Interest Rate	11.48%		11.48%
Acquisition Date	May 04, 2022
Maturity Date	Apr. 28, 2028		Apr. 28, 2028
Principal/Share Amount	$ 978
Investments, amortized cost	966
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 978
Investment, Identifier [Axis]: Smalto Inc, First Lien Secured Term Loan Interest Rate 11.50
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:SmaltoInc.Member
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Household Appliances
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6%
Interest Rate		11.50%
Acquisition Date		May 04, 2022
Maturity Date		Apr. 28, 2028
Investment owned shares | shares		1,001
Investments, amortized cost		$ 987
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 996
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:SnapFitnessHoldingsIncMember	whfcl:SnapFitnessHoldingsIncMember
Investment, Type [Extensible Enumeration]	us-gaap:CommonClassAMember	us-gaap:CommonClassAMember	us-gaap:CommonClassAMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 167	$ 130
Percent of net assets	0.10%		0.10%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:SnapFitnessHoldingsIncMember	whfcl:SnapFitnessHoldingsIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredTermLoanCMember	whfcl:FirstLienSecuredTermLoanCMember	whfcl:FirstLienSecuredTermLoanCMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Leisure Facilities	Leisure Facilities	Leisure Facilities
Spread Above Index	9.50%	9.50%	9.50%
PIK interest rate	9.50%	9.50%	9.50%
Acquisition Date	Jun. 29, 2020	Jun. 29, 2020
Principal/Share Amount	$ 1,737	$ 1,657
Investments, amortized cost	1,734	1,654
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,736	$ 1,623
Percent of net assets	0.60%	0.50%	0.60%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:SnapFitnessHoldingsIncMember	whfcl:SnapFitnessHoldingsIncMember
Investment, Type [Extensible Enumeration]	Warrant [Member]	Warrant [Member]	Warrant [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Leisure Facilities	Leisure Facilities	Leisure Facilities
Acquisition Date	Jun. 29, 2020	Jun. 29, 2020
Principal/Share Amount	$ 1	$ 1
Investments, amortized cost	793	793
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 68	$ 53
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate 11.95
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Environmental & Facilities Services		Environmental & Facilities Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Sterling Overnight Index Average [Member]		Sterling Overnight Index Average [Member]
Floor	0%		0%
Spread Above Index	6.75%		6.75%
Interest Rate	12.02%		12.02%
Acquisition Date	Mar. 23, 2023
Maturity Date	Sep. 28, 2029		Sep. 28, 2029
Principal/Share Amount	$ 1,850
Investments, amortized cost	2,288
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 2,338
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate 12.05
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	0.50%		0.50%
Spread Above Index	6.75%		6.75%
Interest Rate	12.12%		12.12%
Acquisition Date	Mar. 23, 2023
Maturity Date	Sep. 28, 2029		Sep. 28, 2029
Principal/Share Amount	$ 582
Investments, amortized cost	570
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 582
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate CDOR
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SolarHoldingsBidcoLimitedMember	whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Environmental & Facilities Services	Environmental & Facilities Services	Environmental & Facilities Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:CanadianOvernightRepoRateAverageMember	whfcl:CanadianDollarOfferedRateMember	whfcl:CanadianOvernightRepoRateAverageMember
Floor	0.50%	0.50%	0.50%
Spread Above Index	6.75%	6.50%	6.75%
Interest Rate	11.85%	12.08%	11.85%
Acquisition Date	Mar. 23, 2023	Mar. 23, 2023
Maturity Date	Sep. 28, 2029	Sep. 28, 2029	Sep. 28, 2029
Investment owned shares | shares		458
Principal/Share Amount	$ 458
Investments, amortized cost	324	$ 324
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 335	$ 342
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate CORRA
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Environmental & Facilities Services		Environmental & Facilities Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:CanadianOvernightRepoRateAverageMember		whfcl:CanadianOvernightRepoRateAverageMember
Floor	0.50%		0.50%
Spread Above Index	6.75%		6.75%
Interest Rate	12.12%		12.12%
Acquisition Date	Mar. 23, 2023
Maturity Date	Sep. 28, 2029		Sep. 28, 2029
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 21
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate SONIA
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Environmental & Facilities Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]		whfcl:SolarHoldingsBidcoLimitedFirstLienSecuredTermLoanSoniaMember
Floor		0%
Spread Above Index		6.50%
Interest Rate		11.71%
Acquisition Date		Mar. 23, 2023
Maturity Date		Sep. 28, 2029
Investment owned shares | shares		723
Investments, amortized cost		$ 882
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 984
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan SOFR One
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Environmental & Facilities Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		0.50%
Spread Above Index		6.50%
Interest Rate		11.85%
Acquisition Date		Mar. 23, 2023
Maturity Date		Sep. 28, 2029
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Term Loan CDOR
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SolarHoldingsBidcoLimitedMember	whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Environmental & Facilities Services	Environmental & Facilities Services	Environmental & Facilities Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:CanadianOvernightRepoRateAverageMember	whfcl:CanadianDollarOfferedRateMember	whfcl:CanadianOvernightRepoRateAverageMember
Floor	0.50%	0.50%	0.50%
Spread Above Index	6.75%	6.50%	6.75%
Interest Rate	11.85%	11.94%	11.85%
Acquisition Date	Mar. 23, 2023	Mar. 23, 2023
Maturity Date	Sep. 28, 2029	Sep. 28, 2029	Sep. 28, 2029
Investment owned shares | shares		3,873
Principal/Share Amount	$ 3,873
Investments, amortized cost	2,765	$ 2,759
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 2,830	$ 2,892
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Term Loan SF
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SolarHoldingsBidcoLimitedMember	whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	0.50%	0.50%	0.50%
Spread Above Index	6.75%	6.50%	6.75%
Interest Rate	12.14%	11.85%	12.14%
Acquisition Date	Mar. 23, 2023	Mar. 23, 2023
Maturity Date	Sep. 28, 2029	Sep. 28, 2029	Sep. 28, 2029
Investment owned shares | shares		2,807
Principal/Share Amount	$ 2,807
Investments, amortized cost	2,750	$ 2,744
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 2,807	$ 2,786
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Term Loan SONIA
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SolarHoldingsBidcoLimitedMember	whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Environmental & Facilities Services	Environmental & Facilities Services	Environmental & Facilities Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Sterling Overnight Index Average [Member]	whfcl:SolarHoldingsBidcoLimitedFirstLienSecuredTermLoanSoniaMember	Sterling Overnight Index Average [Member]
Floor	0%	0%	0%
Spread Above Index	6.75%	6.50%	6.75%
Interest Rate	12.02%	11.72%	12.02%
Acquisition Date	Mar. 23, 2023	Mar. 23, 2023
Maturity Date	Sep. 28, 2029	Sep. 28, 2029	Sep. 28, 2029
Investment owned shares | shares		171
Principal/Share Amount	$ 171
Investments, amortized cost	205	$ 205
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 216	$ 217
Investment, Identifier [Axis]: Solar Holdings Bidco Limited, First Lien Secured Delayed Draw Loan, Interest Rate SOFR
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Environmental & Facilities Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		0.50%
Spread Above Index		6.50%
Interest Rate		11.85%
Acquisition Date		Mar. 23, 2023
Maturity Date		Sep. 28, 2029
Investment owned shares | shares		368
Investments, amortized cost		$ 360
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 366
Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus, 6.50%, Rate 11.92%, Due 7/30/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SourceCodeHoldingsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	6.50%		6.50%
Interest Rate	11.94%		11.94%
Acquisition Date	Aug. 10, 2021
Maturity Date	Jul. 30, 2027		Jul. 30, 2027
Principal/Share Amount	$ 3,893
Investments, amortized cost	3,853
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 3,878
Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus, 6.50%, Rate 11.96%, Due 7/30/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:SourceCodeHoldingsLLCMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Services [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6.50%
Interest Rate		11.96%
Acquisition Date		Aug. 10, 2021
Maturity Date		Jul. 30, 2027
Investment owned shares | shares		4,088
Investments, amortized cost		$ 4,039
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 4,047
Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus, 6.50%, Rate 11.92%, Due 7/30/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SourceCodeHoldingsLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	6.50%		6.50%
Interest Rate	11.94%		11.94%
Acquisition Date	Aug. 10, 2021
Maturity Date	Jul. 30, 2027		Jul. 30, 2027
Principal/Share Amount	$ 14,239
Investments, amortized cost	14,092
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 14,183
Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus, 6.50%, Rate 11.96%, Due 7/30/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:SourceCodeHoldingsLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Services [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6.50%
Interest Rate		11.96%
Acquisition Date		Aug. 10, 2021
Maturity Date		Jul. 30, 2027
Investment owned shares | shares		14,952
Investments, amortized cost		$ 14,772
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 14,806
Investment, Identifier [Axis]: Sterling Pure Blocker, LLC (d/b/a Banner Industries, Inc.) 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:SterlingPureBlockerLlcMember	whfcl:SterlingPureBlockerLlcMember
Investment, Type [Extensible Enumeration]	whfcl:ClassBUnitsMember	whfcl:ClassBUnitsMember	whfcl:ClassBUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Construction & Engineering	Construction & Engineering	Construction & Engineering
Acquisition Date	Dec. 01, 2023	Dec. 01, 2023
Principal/Share Amount	$ 404	$ 404
Investments, amortized cost	404	404
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 404	$ 404
Percent of net assets	0.10%	0.10%	0.10%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]		false
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
Investment, Issuer Name [Extensible Enumeration]		whfcl:StoiclaneMidcoLlcMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Development
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		7.50%
Interest Rate		13%
Acquisition Date		Nov. 04, 2022
Maturity Date		Nov. 04, 2027
Principal/Share Amount		$ 5,545
Investments, amortized cost		5,466
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 5,633
Percent of net assets		1.80%
Investment, Restriction Status [true false]		true
Investment, Non-income Producing [true false]		false
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
Investment, Issuer Name [Extensible Enumeration]		whfcl:StoiclaneMidcoLlcMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Development
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		7.50%
Interest Rate		13%
Acquisition Date		Nov. 04, 2022
Maturity Date		Nov. 04, 2027
Principal/Share Amount		$ 4,606
Investments, amortized cost		4,518
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 4,606
Percent of net assets		1.50%
Investment, Restriction Status [true false]		true
Investment, Non-income Producing [true false]		false
Investment, Identifier [Axis]: Sunless, Inc.., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.75%, Rate 12.24%, Due 8/13/25
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SunlessInc.Member	whfcl:SunlessInc.Member
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Personal Products	Personal Products	Personal 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]
Floor	1%	1%	1%
Spread Above Index	6.50%	6.75%	6.50%
Interest Rate	12.19%	12.21%	12.19%
Acquisition Date	Oct. 21, 2019	Oct. 21, 2019
Maturity Date	Aug. 13, 2025	Aug. 13, 2025	Aug. 13, 2025
Investment owned shares | shares		488
Principal/Share Amount	$ 887
Investments, amortized cost	884	$ 485
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 887	$ 484
Investment, Identifier [Axis]: Sunless, Inc.., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.75%, Rate 12.24%, Due 8/13/25
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SunlessInc.Member	whfcl:SunlessInc.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Personal Products	Personal Products	Personal 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]
Floor	1%	1%	1%
Spread Above Index	6.50%	6.75%	6.50%
Interest Rate	12.18%	12.20%	12.18%
Acquisition Date	Oct. 21, 2019	Oct. 21, 2019
Maturity Date	Aug. 13, 2025	Aug. 13, 2025	Aug. 13, 2025
Investment owned shares | shares		5,507
Principal/Share Amount	$ 4,956
Investments, amortized cost	4,926	$ 5,459
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 4,956	$ 5,473
Investment, Identifier [Axis]: TOT Group, Inc. (d/b/a Net Element 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
Investment, Issuer Name [Extensible Enumeration]	Tot Group, Inc. [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	whfcl:TransactionPaymentProcessingServicesMember		whfcl:TransactionPaymentProcessingServicesMember
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]
Floor	1%		1%
Spread Above Index	7.50%		7.50%
Interest Rate	12.83%		12.83%
Acquisition Date	Jun. 28, 2024
Maturity Date	Jun. 28, 2029		Jun. 28, 2029
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	false		false
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: TOT Group, Inc. (d/b/a Net Element 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
Investment, Issuer Name [Extensible Enumeration]	Tot Group, Inc. [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	whfcl:TransactionPaymentProcessingServicesMember		whfcl:TransactionPaymentProcessingServicesMember
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]
Floor	1%		1%
Spread Above Index	7.50%		7.50%
Interest Rate	12.83%		12.83%
Acquisition Date	Jun. 28, 2024
Maturity Date	Jun. 28, 2029		Jun. 28, 2029
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	false		false
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: TOT Group, Inc. (d/b/a Net Element 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
Investment, Issuer Name [Extensible Enumeration]	Tot Group, Inc. [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	whfcl:TransactionPaymentProcessingServicesMember		whfcl:TransactionPaymentProcessingServicesMember
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]
Floor	1%		1%
Spread Above Index	7.50%		7.50%
Interest Rate	12.83%		12.83%
Acquisition Date	Jun. 28, 2024
Maturity Date	Jun. 28, 2029		Jun. 28, 2029
Principal/Share Amount	$ 8,239
Investments, amortized cost	8,054
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 8,054
Percent of net assets	2.60%		2.60%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	false		false
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: TOUR Intermediate Holdings., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.96%, Due 5/15/25
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:TOURIntermediateHoldingsLLCMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Investment Banking & Brokerage
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6.50%
Interest Rate		11.96%
Acquisition Date		May 19, 2020
Maturity Date		May 15, 2025
Investment owned shares | shares		2,320
Investments, amortized cost		$ 2,315
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 2,320
Investment, Identifier [Axis]: TOUR Intermediate Holdings., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.96%, Due 5/15/25
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:TOURIntermediateHoldingsLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Investment Banking & Brokerage
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Floor		1%
Spread Above Index		6.50%
Interest Rate		11.96%
Acquisition Date		May 19, 2020
Maturity Date		May 15, 2025
Investment owned shares | shares		2,657
Investments, amortized cost		$ 2,643
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 2,657
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
Investment, Issuer Name [Extensible Enumeration]		whfcl:TeamCarCareHoldingsLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Automotive Retail
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Base Rate [Member]
Floor		1%
Spread Above Index		7.48%
Interest Rate		13.09%
Acquisition Date		Feb. 16, 2018
Maturity Date		Dec. 31, 2024
Principal/Share Amount		$ 12,407
Investments, amortized cost		12,391
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)		$ 12,407
Percent of net assets		3.90%
Investment, Restriction Status [true false]		true
Investment, Significant Unobservable Input [true false]		true
Investment, Non-income Producing [true false]		false
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
Investment, Issuer Name [Extensible Enumeration]	Telestream Holdings Corporation [Member]	Telestream Holdings Corporation [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	9.75%	11.75%	9.75%
Interest Rate	15.19%	17.21%	15.19%
Investment, interest rate, paid in cash	5.44%		5.44%
PIK interest rate	9.75%		9.75%
Acquisition Date	Oct. 15, 2020	Oct. 15, 2020
Maturity Date	Oct. 15, 2025	Oct. 15, 2025	Oct. 15, 2025
Principal/Share Amount	$ 1,061	$ 1,242
Investments, amortized cost	1,053	1,228
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,043	$ 1,223
Percent of net assets	0.30%	0.40%	0.30%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	Telestream Holdings Corporation [Member]	Telestream Holdings Corporation [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	9.75%	11.75%	9.75%
Interest Rate	15.19%	17.28%	15.19%
Investment, interest rate, paid in cash	5.44%		5.44%
PIK interest rate	9.75%		9.75%
Acquisition Date	Oct. 15, 2020	Oct. 15, 2020
Maturity Date	Oct. 15, 2025	Oct. 15, 2025	Oct. 15, 2025
Principal/Share Amount	$ 17,285	$ 15,763
Investments, amortized cost	17,153	15,580
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 17,022	$ 15,522
Percent of net assets	5.40%	4.90%	5.40%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:TheKyjenCompanyLLCMember	whfcl:TheKyjenCompanyLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Household Products	Household Products	Household 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]
Floor	1%	1%	1%
Spread Above Index	7.50%	7.50%	7.50%
Interest Rate	12.96%	13.21%	12.96%
Investment, interest rate, paid in cash	11.96%	12.21%	11.96%
PIK interest rate	1%	1%	1%
Acquisition Date	Apr. 05, 2021	Apr. 05, 2021
Maturity Date	Apr. 05, 2026	Apr. 05, 2026	Apr. 05, 2026
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ (33)	$ (31)
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:TheKyjenCompanyLLCMember	whfcl:TheKyjenCompanyLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Household Products	Household Products	Household 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]
Floor	1%	1%	1%
Spread Above Index	7.50%	7.50%	7.50%
Interest Rate	12.96%	13.21%	12.96%
Investment, interest rate, paid in cash	11.96%	12.21%	11.96%
PIK interest rate	1%	1%	1%
Acquisition Date	Apr. 05, 2021	Apr. 05, 2021
Maturity Date	Apr. 05, 2026	Apr. 05, 2026	Apr. 05, 2026
Principal/Share Amount	$ 11,358	$ 11,358
Investments, amortized cost	11,299	11,282
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 10,903	$ 10,904
Percent of net assets	3.50%	3.40%	3.50%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:TokenBuyerIncMember	whfcl:TokenBuyerIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	0.50%	0.50%	0.50%
Spread Above Index	6%	6%	6%
Interest Rate	11.48%	11.53%	11.48%
Acquisition Date	May 26, 2022	May 26, 2022
Maturity Date	May 31, 2029	May 31, 2029	May 31, 2029
Principal/Share Amount	$ 7,106	$ 7,142
Investments, amortized cost	6,702	6,695
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 5,402	$ 5,966
Percent of net assets	1.70%	1.90%	1.70%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Transervice Holdings, Inc. (d/b/a Transervice Logistics, 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:TranserviceHoldingsIncMember	whfcl:TranserviceHoldingsIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	2%	2%	2%
Spread Above Index	7.50%	7.50%	7.50%
Interest Rate	12.94%	12.96%	12.94%
Acquisition Date	Jun. 29, 2023	Jun. 29, 2023
Maturity Date	Jun. 29, 2028	Jun. 29, 2028	Jun. 29, 2028
Principal/Share Amount	$ 8,775	$ 8,888
Investments, amortized cost	8,565	8,648
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 8,819	$ 8,743
Percent of net assets	2.80%	2.80%	2.80%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:TrimliteBuyerLLCMember	whfcl:TrimliteBuyerLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Building Products	Building Products	Building Products
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:CanadianDollarOfferedRateMember	whfcl:CanadianDollarOfferedRateMember	whfcl:CanadianDollarOfferedRateMember
Floor	1%	1%	1%
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.53%	11.94%	11.53%
Acquisition Date	Jul. 27, 2021	Jul. 27, 2021
Maturity Date	Jul. 27, 2027	Jul. 27, 2027	Jul. 27, 2027
Principal/Share Amount		$ 19,624	$ 18,984
Investments, amortized cost	$ 14,988	15,472
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 13,871	$ 14,810
Percent of net assets	4.40%	4.70%	4.40%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: TriplePoint Acquisition Holdings LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:TriplepointAcquisitionHoldingsLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	5.50%		5.50%
Interest Rate	10.83%		10.83%
Acquisition Date	Jun. 14, 2024
Maturity Date	May 31, 2029		May 31, 2029
Investment, Identifier [Axis]: TriplePoint Acquisition Holdings LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:TriplepointAcquisitionHoldingsLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	5.50%		5.50%
Interest Rate	10.83%		10.83%
Acquisition Date	Jun. 14, 2024
Maturity Date	May 31, 2029		May 31, 2029
Investment, Identifier [Axis]: TriplePoint Acquisition Holdings LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:TriplepointAcquisitionHoldingsLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	5.50%		5.50%
Interest Rate	10.83%		10.83%
Acquisition Date	Jun. 14, 2024
Maturity Date	May 31, 2029		May 31, 2029
Principal/Share Amount	$ 5,376
Investments, amortized cost	5,270
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 5,270
Investment, Identifier [Axis]: Turnberry Solutions., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus5.75%, Rate 11.45%, Due 9/2/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:TurnberrySolutionsInc.Member	whfcl:TurnberrySolutionsInc.Member
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	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
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]
Floor	1%	1%	1%
Spread Above Index	5%	5.75%	5%
Interest Rate	11.23%	11.45%	11.23%
Acquisition Date	Aug. 10, 2021	Aug. 10, 2021
Maturity Date	Sep. 02, 2026	Sep. 02, 2026	Sep. 02, 2026
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 6	$ 2
Investment, Identifier [Axis]: Turnberry Solutions., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus5.75%, Rate 11.45%, Due 9/2/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:TurnberrySolutionsInc.Member	whfcl:TurnberrySolutionsInc.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	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
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]
Floor	1%	1%	1%
Spread Above Index	6%	5.75%	6%
Interest Rate	11.23%	11.45%	11.23%
Acquisition Date	Aug. 10, 2021	Aug. 10, 2021
Maturity Date	Sep. 02, 2026	Sep. 02, 2026	Sep. 02, 2026
Investment owned shares | shares		6,026
Principal/Share Amount	$ 5,995
Investments, amortized cost	5,943	$ 5,962
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 5,995	$ 5,979
Investment, Identifier [Axis]: Twin Ridge CRS, LP (d/b/a CRS OneSource) Class A Common Units
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Non-controlled/non-affiliate company investments		Non-controlled/non-affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:TwinRidgeCrsLpMember
Investment, Type [Extensible Enumeration]	whfcl:ClassCommonUnitsMember		whfcl:ClassCommonUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Food Distributors		Food Distributors
Acquisition Date	May 10, 2024
Principal/Share Amount	$ 63
Investments, amortized cost	317
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 317
Percent of net assets	0.10%		0.10%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	false		false
Investment, Non-income Producing [true false]	false		false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:UsMethanolMidcoLlcMember	whfcl:UsMethanolMidcoLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	8.25%	7.75%	8.25%
Interest Rate	13.74%	13.29%	13.74%
PIK interest rate	13.74%		13.74%
Acquisition Date	Dec. 20, 2022	Dec. 20, 2022
Maturity Date	Dec. 20, 2027	Dec. 20, 2027	Dec. 20, 2027
Principal/Share Amount	$ 9,136	$ 9,540
Investments, amortized cost	8,973	9,345
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 9,136	$ 9,449
Percent of net assets	2.90%	3%	2.90%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:UsMethanolMidcoLlcMember	whfcl:UsMethanolMidcoLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	8.25%	7.75%	8.25%
Interest Rate	13.74%	13.28%	13.74%
PIK interest rate	13.74%		13.74%
Acquisition Date	Dec. 20, 2022	Dec. 20, 2022
Maturity Date	Dec. 20, 2027	Dec. 20, 2027	Dec. 20, 2027
Principal/Share Amount	$ 4,993	$ 5,203
Investments, amortized cost	4,916	5,111
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 4,993	$ 5,153
Percent of net assets	1.60%	1.60%	1.60%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: UserZoom Technologies, 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:UserzoomTechnologiesIncMember	whfcl:UserzoomTechnologiesIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	7.50%	7.50%	7.50%
Interest Rate	12.81%	12.99%	12.81%
Acquisition Date	Jan. 12, 2023	Jan. 12, 2023
Maturity Date	Apr. 05, 2029	Apr. 05, 2029	Apr. 05, 2029
Principal/Share Amount	$ 9,819	$ 9,819
Investments, amortized cost	9,594	9,570
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 9,913	$ 9,719
Percent of net assets	3.20%	3.20%	3.20%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Vistria Blocked MGT Investor, LP (d/b/a MGT Consulting Group) Series 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:VistriaBlockedMgtInvestorLpMember	whfcl:VistriaBlockedMgtInvestorLpMember
Investment, Type [Extensible Enumeration]	whfcl:ClassAUnitsMember	whfcl:SeriesUnitsMember	whfcl:ClassAUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	IT Consulting And Other Services	IT Consulting And Other Services	IT Consulting And Other Services
Acquisition Date	Apr. 10, 2023	Apr. 10, 2023
Investments, amortized cost	$ 314	$ 314
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 524	$ 406
Percent of net assets	0.20%	0.10%	0.20%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Equity
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:WHFSTRSOhioSeniorLoanFundLLCMember	whfcl:WHFSTRSOhioSeniorLoanFundLLCMember
Investment, Type [Extensible Enumeration]	Equity Investments	Equity Investments	Equity Investments
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 23,303	$ 22,782		20,160
Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Interests
Schedule of Investments [Line Items]
Investment, Issuer Affiliation [Extensible Enumeration]	Controlled affiliate company investments	Non-controlled/non-affiliate company investments	Controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:WHFSTRSOhioSeniorLoanFundMember	whfcl:WHFSTRSOhioSeniorLoanFundMember
Investment, Type [Extensible Enumeration]	whfcl:LLCInterestsMember	whfcl:LLCInterestsMember	whfcl:LLCInterestsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Specialized Finance	Specialized Finance	Specialized Finance
Acquisition Date	Jul. 19, 2019	Jul. 19, 2019
Principal/Share Amount	$ 21,104	$ 21,104
Investments, amortized cost	21,104	21,104
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 23,303	$ 22,782
Percent of net assets	7.50%	7.20%	7.50%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true 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]	Controlled affiliate company investments	Non-controlled/non-affiliate company investments	Controlled affiliate company investments
Investment, Issuer Name [Extensible Enumeration]	whfcl:WHFSTRSOhioSeniorLoanFundLLCMember	whfcl:WHFSTRSOhioSeniorLoanFundLLCMember
Investment, Type [Extensible Enumeration]	Subordinated Debt [Member]	Subordinated Debt [Member]	Subordinated Debt [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Specialized Finance	Specialized Finance	Specialized Finance
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]
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.83%	11.85%	11.83%
Acquisition Date	Jul. 19, 2019	Jul. 19, 2019
Principal/Share Amount	$ 84,416	$ 84,416
Investments, amortized cost	84,416	84,416
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 84,416	$ 84,416		$ 80,000
Percent of net assets	27%	26.60%	27%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
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
Investment, Issuer Name [Extensible Enumeration]	whfcl:WhatIfMediaGroupLLCMember	whfcl:WhatIfMediaGroupLLCMember
Investment, Type [Extensible Enumeration]	whfcl:CommonUnitsMember	whfcl:CommonUnitsMember	whfcl:CommonUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Interactive Media & Services	Interactive Media & Services	Interactive Media & Services
Acquisition Date	Jul. 02, 2021	Jul. 02, 2021
Principal/Share Amount	$ 3,081	$ 3,081
Investments, amortized cost	851	851
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 1,919	$ 1,615
Percent of net assets	0.60%	0.50%	0.60%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true	true	true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Whitestone Home Furnishings, LLC (d/b/a Saatva, 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:WhitestoneHomeFurnishingsLlcMember	whfcl:WhitestoneHomeFurnishingsLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%	1%	1%
Spread Above Index	6.50%	6.50%	6.50%
Interest Rate	11.94%	11.96%	11.94%
Acquisition Date	Nov. 06, 2023	Nov. 06, 2023
Maturity Date	Aug. 20, 2026	Aug. 20, 2026	Aug. 20, 2026
Principal/Share Amount	$ 2,960	$ 2,990
Investments, amortized cost	2,903	2,919
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 2,948	$ 2,919
Percent of net assets	0.90%	0.90%	0.90%
Investment, Restriction Status [true false]	true	true	true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false	false	false
Investment, Identifier [Axis]: Zephyr Buyer, L.P. (d/b/a The Weather 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:ZephyrBuyerL.p.Member
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	6.75%		6.75%
Interest Rate	12.08%		12.08%
Acquisition Date	Jan. 31, 2024
Maturity Date	Jan. 31, 2030		Jan. 31, 2030
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 13
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false		false
Investment, Identifier [Axis]: Zephyr Buyer, L.P. (d/b/a The Weather 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
Investment, Issuer Name [Extensible Enumeration]	whfcl:ZephyrBuyerL.p.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Floor	1%		1%
Spread Above Index	6.75%		6.75%
Interest Rate	12.08%		12.08%
Acquisition Date	Jan. 31, 2024
Maturity Date	Jan. 31, 2030		Jan. 31, 2030
Principal/Share Amount	$ 14,158
Investments, amortized cost	13,829
Total investments, at fair value (amortized cost $704,521 and $740,021, respectively)	$ 13,934
Percent of net assets	4.50%		4.50%
Investment, Restriction Status [true false]	true		true
Investment, Significant Unobservable Input [true false]	true		true
Investment, Non-income Producing [true false]	false		false

ORGANIZATION

ORGANIZATION	6 Months Ended
	Jun. 30, 2024
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 are based on a floating interest rate such as SOFR plus a spread and typically 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.

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	6 Months Ended
	Jun. 30, 2024
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-Q 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 Fair Value Measurements and Disclosures. with ASC Topic 820, the Company has categorized its financial instruments carried at fair value, based on the priority of the valuation technique, into a three-level fair value hierarchy. Fair value is a market-based measure considered from the perspective of the market participant who holds the financial instrument. Therefore, when market assumptions are not readily available, the Company’s own assumptions are set to reflect those that management believes market participants would use in pricing the financial instrument at the measurement date. 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 income and realized net short-term capital gains in excess of realized net long-term capital losses, if any, out of the assets legally available for distribution. In addition, the Company will incur a nondeductible excise tax equal to 4% of the amount by which (1) 98% of ordinary income for the calendar year (taking into account certain deferrals and elections), (2) 98.2% of capital gains in excess of capital losses, adjusted for certain ordinary losses, for the one-year period ending on October 31 of the calendar year and (3) any ordinary income and capital gain income for preceding years that were not distributed during such years and on which the Company incurred no U.S. federal income tax exceed distributions for the year. The Company accrues estimated excise tax on the amount, if any, that estimated taxable income is expected to exceed the level of stockholder distributions described above. 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 June 30, 2024 and December 31, 2023. 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 June 30, 2024 or December 31, 2023. 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 2020 remain subject to examination by the Internal Revenue Service. As of June 30, 2024 and December 31, 2023, the cost of investments for federal income tax purposes was $721,765 and $751,117 resulting in net unrealized depreciation of $61,760 and $54,949, respectively. This is comprised of gross unrealized appreciation of $28,476 and $6,881 and gross unrealized depreciation of $90,236 and $61,830, on a tax basis, as of June 30, 2024 and December 31, 2023, respectively. 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 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 In November 2023, the FASB issued ASU 2023-07 “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures,” or ASU 2023-07. ASU 2023-07 enhances the disclosures required for reportable segments on an annual and interim basis. ASU 2023-07 is effective on a retrospective basis for annual periods beginning after December 15, 2023, for interim periods within fiscal years beginning after December 15, 2024, and early adoption is permitted. We do not expect the adoption of ASU 2023-07 to have a material impact on our consolidated financial statements .

FORWARD CURRENCY CONTRACTS

FORWARD CURRENCY CONTRACTS	6 Months Ended
	Jun. 30, 2024
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 three and six months ended June 30, 2024 and 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended June 30, ​ ​ ​ Six months ended June 30, ($ in thousands) ​ ​ 2024 ​ ​ 2023 ​ ​ 2024 ​ ​ 2023 Realized gain (loss) on forward currency contracts ​ $ 28 ​ $ 4 ​ ​ $ — ​ $ (3) Unrealized appreciation (depreciation) on forward currency contracts ​ ​ (16) ​ ​ (12) ​ ​ ​ 36 ​ ​ (6) Total net realized and unrealized gains (losses) on forward currency contracts ​ $ 12 ​ $ (8) ​ ​ $ 36 ​ $ (9) ​ ​ 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. Open contracts as of June 30, 2024 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Counterparty Currency to be sold Currency to be purchased Settlement date Unrealized appreciation Unrealized depreciation Morgan Stanley ​ C$ 1,619 CAD ​ $ 1,177 USD ​ 8/7/24 ​ $ — ​ $ (7) Total ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ — ​ $ (7) ​ 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. Open contracts as of December 31, 2023 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Counterparty ​ Currency to be sold Currency to be purchased Settlement date Unrealized appreciation Unrealized depreciation Morgan Stanley ​ ​ C$ 1,253 CAD ​ $ 903 USD ​ 2/7/24 ​ $ — ​ $ (43) Total ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ — ​ $ (43) ​ The following table is a summary of the average USD notional exposure to foreign currency forward contracts for the three and six months ended June 30, 2024 and 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended June 30, ​ Six months ended June 30, Average USD notional outstanding ​ 2024 ​ ​ 2023 ​ 2024 ​ ​ 2023 Forward currency contracts ​ $ 1,208 ​ $ 401 ​ $ 1,157 ​ $ 395 ​ 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 June 30, 2024 and December 31, 2023. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of June 30, 2024 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) ​ $ — ​ $ 7 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 7 Total ​ $ — ​ $ 7 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 7 ​ (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, 2023 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) ​ $ — ​ $ 43 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 43 Total ​ $ — ​ $ 43 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 43 (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

INVESTMENTS	6 Months Ended
	Jun. 30, 2024
INVESTMENTS
INVESTMENTS	NOTE 4 - INVESTMENTS Investments consisted of the following : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of June 30, 2024 ​ As of December 31, 2023 ​ Amortized Cost Fair Value Amortized Cost Fair Value First lien secured loans ​ $ 547,482 ​ $ 522,943 ​ $ 584,480 ​ $ 555,878 Second lien secured loans ​ 4,949 ​ 5,002 ​ 24,558 ​ 16,246 Unsecured loans ​ ​ 1,264 ​ 1,261 ​ ​ 167 ​ 167 Subordinated Note to STRS JV ​ 84,416 ​ 84,416 ​ 84,416 ​ 84,416 Equity (excluding STRS JV) ​ 45,306 ​ 23,080 ​ 25,296 ​ 16,679 Equity in STRS JV ​ 21,104 ​ 23,303 ​ 21,104 ​ 22,782 Total ​ $ 704,521 ​ $ 660,005 ​ $ 740,021 ​ $ 696,168 ​ ​ The following table shows the portfolio composition by industry grouping at fair value: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Industry ($ in thousands) ​ As of June 30, 2024 ​ As of December 31, 2023 ​ Advertising $ 14,732 2.7 % $ 5,285 0.9 % Air Freight & Logistics ​ ​ 27,841 ​ 5.0 ​ ​ 22,616 ​ 3.8 ​ Alternative Carriers ​ ​ 13,621 ​ 2.5 ​ ​ 13,191 ​ 2.2 ​ Application Software ​ ​ 32,378 ​ 5.9 ​ ​ 34,202 ​ 5.8 ​ Automotive Retail ​ ​ — ​ — ​ ​ 12,407 ​ 2.1 ​ Broadcasting ​ ​ 8,338 ​ 1.5 ​ ​ 7,243 ​ 1.3 ​ Broadline Retail ​ ​ 21,868 ​ 4.0 ​ ​ 36,672 ​ 6.2 ​ Building Products ​ ​ 14,905 ​ 2.7 ​ ​ 15,863 ​ 2.7 ​ Cable & Satellite ​ ​ — ​ — ​ ​ 20,969 ​ 3.6 ​ Commodity Chemicals ​ ​ 30,239 ​ 5.5 ​ ​ 30,712 ​ 5.2 ​ Communications Equipment ​ ​ 8,625 ​ 1.6 ​ ​ — ​ — ​ Construction & Engineering ​ ​ 993 ​ 0.2 ​ ​ 541 ​ 0.1 ​ Construction Materials ​ ​ 6,306 ​ 1.1 ​ ​ 6,901 ​ 1.2 ​ Data Processing & Outsourced Services ​ ​ 29,541 ​ 5.3 ​ ​ 21,480 ​ 3.6 ​ Distributors ​ ​ 11,845 ​ 2.1 ​ ​ 12,475 ​ 2.1 ​ Diversified Chemicals ​ ​ 4,235 ​ 0.8 ​ ​ 10,259 ​ 1.8 ​ Diversified Financial Services ​ ​ — ​ — ​ ​ 3,472 ​ 0.6 ​ Diversified Support Services ​ ​ 9,423 ​ 1.7 ​ ​ 9,607 ​ 1.6 ​ Education Services ​ ​ 11,886 ​ 2.2 ​ ​ 12,570 ​ 2.1 ​ Electric Utilities ​ ​ 16,083 ​ 2.9 ​ ​ 15,954 ​ 2.7 ​ Environmental & Facilities Services ​ ​ 23,421 ​ 4.2 ​ ​ 23,878 ​ 4.1 ​ Food Distributors ​ ​ 317 ​ 0.1 ​ ​ — ​ — ​ Health Care Facilities ​ ​ 8,867 ​ 1.6 ​ ​ 8,966 ​ 1.5 ​ Health Care Services ​ ​ 10,484 ​ 1.9 ​ ​ 17,643 ​ 3.0 ​ Health Care Supplies ​ ​ 18,768 ​ 3.4 ​ ​ 18,983 ​ 3.2 ​ Heavy Electrical Equipment ​ ​ 10,179 ​ 1.8 ​ ​ 10,135 ​ 1.7 ​ Home Furnishings ​ ​ 27,653 ​ 5.0 ​ ​ 27,508 ​ 4.7 ​ Household Appliances ​ ​ 5,402 ​ 1.0 ​ ​ 5,966 ​ 1.0 ​ Household Products ​ ​ 10,870 ​ 2.0 ​ ​ 10,873 ​ 1.8 ​ Industrial Machinery & Supplies & Components ​ ​ 1,253 ​ 0.2 ​ ​ 6,417 ​ 1.1 ​ Interactive Media & Services ​ ​ 22,932 ​ 4.2 ​ ​ 9,363 ​ 1.6 ​ Investment Banking & Brokerage ​ ​ — ​ — ​ ​ 3,522 ​ 0.6 ​ IT Consulting & Other Services ​ ​ 6,224 ​ 1.1 ​ ​ 6,549 ​ 1.1 ​ Leisure Facilities ​ ​ 24,181 ​ 4.4 ​ ​ 22,619 ​ 3.8 ​ Leisure Products ​ ​ 15,502 ​ 2.8 ​ ​ 12,738 ​ 2.2 ​ Life Sciences Tools & Services ​ ​ 5,002 ​ 0.9 ​ ​ 4,901 ​ 0.8 ​ Office Services & Supplies ​ ​ 9,441 ​ 1.7 ​ ​ 21,253 ​ 3.6 ​ Packaged Foods & Meats ​ ​ 4,009 ​ 0.7 ​ ​ — ​ — ​ Paper & Plastic Packaging Products & Materials ​ ​ 61 ​ — ​ ​ 179 ​ — ​ Real Estate Development ​ ​ — ​ — ​ ​ 10,239 ​ 1.8 ​ Real Estate Operating Companies ​ ​ 6,581 ​ 1.1 ​ ​ 6,539 ​ 1.2 ​ Real Estate Services ​ ​ 10,083 ​ 1.8 ​ ​ — ​ — ​ Research & Consulting Services ​ ​ — ​ — ​ ​ 16,081 ​ 2.7 ​ Security & Alarm Services ​ ​ 6,930 ​ 1.3 ​ ​ — ​ — ​ Specialized Consumer Services ​ ​ 23,339 ​ 4.2 ​ ​ 23,931 ​ 4.1 ​ Specialized Finance (1) ​ ​ — ​ — ​ ​ — ​ — ​ Systems Software ​ ​ 11,809 ​ 2.1 ​ ​ 11,523 ​ 2.0 ​ Technology Hardware, Storage & Peripherals ​ ​ 18,065 ​ 3.3 ​ ​ 16,745 ​ 2.8 ​ Transaction & Payment Processing Services ​ ​ 8,054 ​ 1.5 ​ ​ — ​ — ​ Total (1) ​ $ 552,286 ​ 100.0 % $ 588,970 ​ 100.0 % (1) Excludes investments in STRS JV. ​ As of June 30, 2024, the portfolio companies underlying the investments are all located in the United States and its territories, except for Arcserve Cayman Opco LP, Arcserve Cayman GP LLC, Arcserve Cayman Topco LP, and Alvaria Holdco (Cayman), which are domiciled in Cayman Islands and Trimlite Buyer, LLC, which is domiciled in Canada. As of June 30, 2024 and December 31, 2023, the weighted average remaining term of the Company’s debt investments, excluding non-accrual investments, was approximately 3.1 years and 2.8 years, respectively. ​ As of June 30, 2024 the total cost basis of non-accrual loans was $40,199, and the total fair value of non-accrual loans was $22,333. As of December 31, 2023, the total cost basis of non-accrual loans was $38,322, and the total fair value of non-accrual loans was $14,087. ​ 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 six months ended June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Dividends, ​ Beginning ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net Change in ​ Ending Fair ​ ​ ​ ​ interest and PIK ​ Fair Value as of ​ ​ ​ ​ ​ ​ ​ Net ​ Unrealized ​ Value as of ​ ​ Type of ​ included in ​ December 31, ​ Gross ​ Gross ​ Realized ​ Appreciation ​ June 30, Affiliated Person (1) ​ Asset income 2023 Additions (2) Reductions (3) Gain (Loss) (Depreciation) 2024 Non-controlled affiliates ​ ​ ​ ​ ​ ​ ​ ​ Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC) ​ First Lien Secured Delayed Draw Loan ​ $ 56 ​ $ — ​ $ 629 ​ $ — ​ $ — ​ $ 650 ​ $ 1,279 Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC) ​ Unsecured Loan ​ ​ 26 ​ — ​ 542 ​ — ​ — ​ 13 ​ 555 Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC) ​ Unsecured Loan ​ ​ 26 ​ — ​ 555 ​ — ​ — ​ 13 ​ 568 Arcserve Cayman GP LLC (d/b/a Arcserve (USA), LLC) ​ Common Units ​ ​ — ​ — ​ — ​ — ​ — ​ — ​ — Arcserve Cayman Topco LP (d/b/a Arcserve (USA), LLC) ​ Common Units ​ ​ — ​ — ​ 19,568 ​ — ​ — ​ (10,161) ​ 9,407 Playmonster Group LLC ​ Priority First Lien Secured Term Loan ​ ​ 78 ​ 1,015 ​ 78 ​ — ​ — ​ (38) ​ 1,055 Playmonster Group LLC ​ First Lien Secured Term Loan ​ — ​ 1,363 ​ — ​ — ​ — ​ (339) ​ 1,024 Playmonster Group Equity, Inc. (d/b/a PlayMonster) ​ Preferred Equity ​ — ​ — ​ — ​ — ​ — ​ — ​ — Playmonster Group Equity, Inc. (d/b/a PlayMonster) ​ Common Equity ​ — ​ — ​ — ​ — ​ — ​ — ​ — Chase Products Co. (f/k/a Starco) ​ First Lien Secured Term Loan ​ ​ 182 ​ 2,793 ​ 182 ​ — ​ — ​ (17) ​ 2,958 Pressurized Holdings, LLC (f/k/a Starco) ​ Common Units ​ ​ — ​ — ​ — ​ — ​ — ​ — ​ — Pressurized Holdings, LLC (f/k/a Starco) ​ Preferred Units ​ ​ — ​ 251 ​ — ​ — ​ — ​ (73) ​ 178 Total Non-controlled affiliates ​ ​ ​ $ 368 ​ $ 5,422 ​ $ 21,554 ​ $ — ​ $ — ​ $ (9,952) ​ $ 17,024 Controlled affiliates ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ American Crafts, LC ​ Super Senior Priority First Lien Secured Term Loan ​ $ 53 ​ $ — ​ $ 2,317 ​ $ — ​ $ — ​ $ — ​ $ 2,317 American Crafts, LC ​ Super Senior Priority First Lien Secured Term Loan ​ ​ 68 ​ ​ — ​ ​ 1,200 ​ ​ — ​ ​ — ​ ​ — ​ ​ 1,200 American Crafts, LC ​ Super Priority First Lien Secured Term Loan ​ ​ 137 ​ ​ 1,878 ​ ​ 139 ​ ​ — ​ ​ — ​ ​ (5) ​ ​ 2,012 American Crafts, LC ​ Priority First Lien Secured Term Loan ​ ​ (8) ​ ​ 3,226 ​ ​ — ​ ​ — ​ ​ — ​ ​ 170 ​ ​ 3,396 American Crafts, LC ​ First Lien Secured Term Loan ​ ​ — ​ ​ 553 ​ ​ — ​ ​ — ​ ​ — ​ ​ (111) ​ ​ 442 American Crafts, LC ​ First Lien Secured Delayed Draw Loan ​ ​ — ​ ​ 93 ​ ​ — ​ ​ — ​ ​ — ​ ​ (19) ​ ​ 74 American Crafts Holdings, LLC (d/b/a American Crafts, LC) ​ Warrants ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — New American Crafts Holdings, LLC (d/b/a American Crafts, LC) ​ Class A Units ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — WHF STRS Ohio Senior Loan Fund LLC* Subordinated Note ​ ​ 4,992 ​ ​ 84,416 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 84,416 WHF STRS Ohio Senior Loan Fund LLC* Equity ​ 3,712 ​ 22,782 ​ — ​ — ​ — ​ 521 ​ 23,303 Total Controlled affiliates ​ $ 8,954 ​ $ 112,948 ​ $ 3,656 ​ $ — ​ $ — ​ $ 556 ​ $ 117,160 * 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. (2) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK, an exchange of existing investments for new investments and the transfers of an existing portfolio company into this category from a different category. (3) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, an exchange of existing investments for new investments and the transfers of an existing portfolio company into this category from a different category. ​ In January 2024, as part of a restructuring agreement between the Company and Arcstor Midco, LLC (d/b/a Arcserve (USA), the Company’s first lien secured term loan and priority first lien delayed draw loan investments in Arcstor Midco, LLC (d/b/a Arcserve (USA), converted into a new unsecured notes in Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC) and common equity of Arcserve Cayman GP LLC (d/b/a Arcserve (USA), LLC) and Arcserve Cayman Topco LP (d/b/a Arcserve (USA), LLC). ​ ​ 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, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Dividends, interest ​ Beginning ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net Change in ​ Ending Fair ​ ​ ​ ​ and PIK ​ Fair Value as of ​ ​ ​ ​ ​ ​ ​ Net ​ Unrealized ​ Value as of ​ ​ Type of ​ included in ​ December 31, ​ ​ ​ ​ ​ ​ ​ Realized ​ Appreciation ​ December 31, Affiliated Person (1) ​ Asset income 2022 Purchases Sales Gain (Loss) (Depreciation) 2023 Non-controlled affiliates ​ ​ ​ ​ ​ ​ ​ ​ Arcole Holding Corporation ​ Equity ​ $ 84 ​ $ 6,380 ​ $ — ​ $ (6,605) ​ $ (339) ​ $ 564 ​ $ — Playmonster Group LLC ​ Priority First Lien Secured Term Loan ​ ​ 129 ​ 176 ​ 943 ​ — ​ — ​ (104) ​ 1,015 Playmonster Group LLC ​ First Lien Secured Term Loan ​ (85) ​ 2,977 ​ — ​ — ​ — ​ (1,614) ​ 1,363 Playmonster Group Equity, Inc. (d/b/a PlayMonster) ​ Preferred Equity ​ — ​ — ​ — ​ — ​ — ​ — ​ — Playmonster Group Equity, Inc. (d/b/a PlayMonster) ​ Common Equity ​ — ​ — ​ — ​ — ​ — ​ — ​ — Chase Products Co. (f/k/a Starco) ​ First Lien Secured Term Loan ​ ​ 270 ​ — ​ 2,961 ​ — ​ — ​ (168) ​ 2,793 Pressurized Holdings, LLC (f/k/a Starco) ​ Common Units ​ ​ — ​ — ​ — ​ — ​ — ​ — ​ — Pressurized Holdings, LLC (f/k/a Starco) ​ Preferred Units ​ ​ — ​ — ​ 4,537 ​ — ​ — ​ (4,286) ​ 251 Total Non-controlled affiliates ​ ​ ​ $ 398 ​ $ 9,533 ​ $ 8,441 ​ $ (6,605) ​ $ (339) ​ $ (5,608) ​ $ 5,422 Controlled affiliates ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ American Crafts, LC ​ Super Priority First Lien Secured Term Loan ​ $ 109 ​ $ — ​ $ 1,903 ​ $ — ​ $ — ​ $ (25) ​ $ 1,878 American Crafts, LC ​ Priority First Lien Secured Term Loan ​ ​ 575 ​ ​ — ​ ​ 5,105 ​ ​ — ​ ​ — ​ ​ (1,879) ​ ​ 3,226 American Crafts, LC ​ First Lien Secured Term Loan ​ ​ 568 ​ ​ — ​ ​ 7,491 ​ ​ — ​ ​ — ​ ​ (6,938) ​ ​ 553 American Crafts, LC ​ First Lien Secured Delayed Draw Loan ​ ​ 95 ​ ​ — ​ ​ 1,259 ​ ​ — ​ ​ — ​ ​ (1,166) ​ ​ 93 American Crafts Holdings, LLC (d/b/a American Crafts, LC) ​ Warrants ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — New American Crafts Holdings, LLC (d/b/a American Crafts, LC) ​ Class A Units ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — WHF STRS Ohio Senior Loan Fund LLC* Subordinated Note ​ ​ 9,488 ​ ​ 80,000 ​ ​ 4,416 ​ ​ — ​ ​ — ​ ​ — ​ ​ 84,416 WHF STRS Ohio Senior Loan Fund LLC* Equity ​ 6,158 ​ 20,160 ​ 1,104 ​ — ​ — ​ 1,518 ​ 22,782 Total Controlled affiliates ​ $ 16,993 ​ $ 100,160 ​ $ 21,278 ​ $ — ​ $ — ​ $ (8,490) ​ $ 112,948 ​ * 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. (2) Gross additions may include increases in the cost basis of investments resulting from new portfolio investments, PIK, an exchange of existing investments for new investments and the transfers of an existing portfolio company into this category from a different category. (3) Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, an exchange of existing investments for new investments and the transfers of an existing portfolio company into this category from a different category. ​ In March 2023, as a result of a restructuring agreement between the Company and American Crafts, LC, the Company’s investments are controlled affiliate investments, as defined by the 1940 Act. ​ In March 2023, as part of a restructuring agreement between the Company and Sklar Holdings, Inc (d/b/a Starco), the Company’s first lien secured term loan investment to Sklar Holdings, Inc, with a total cost basis of $3,339, converted into a new first lien secured term loan to Chase Products Co. (f/k/a Starco) and preferred units and common units of Pressurized Holdings, LLC (f/k/a Starco). During the three months ended June 30, 2023, the Company received a paydown of $690 on its investment in Sklar Holdings, Inc (d/b/a Starco) first lien secured term loan, and the remaining Sklar Holdings, Inc (d/b/a Starco) first lien secured term loan investment, with a cost basis of $3,892, was converted into preferred units of Pressurized Holdings, LLC (f/k/a Starco). ​ 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 SOFR and have a term of three In February 2023, the Company increased its commitment to the STRS JV in the amount of an additional $15,000, which brings the Company’s total capital commitment to the STRS JV to $115,000, comprised of $92,000 of subordinated notes and $23,000 of LLC equity interests, and STRS Ohio increased its capital commitment to the STRS JV in the amount of an additional $10,000, which brings its total capital commitment to the STRS JV to $60,000, comprised of $48,000 of subordinated notes and $12,000 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. 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 was approximately 66.67% and 33.33%, respectively. As June 30, 2024 and December 31, 2023, STRS JV had total assets of $345,007 and $332,160, respectively. STRS JV’s portfolio consisted of debt investments in 38 portfolio companies as of June 30, 2024 and 34 portfolio companies as of December 31, 2023. As of June 30, 2024 and December 31, 2023, the largest investment by aggregate principal amount (including any unfunded commitments) in a single portfolio company in STRS JV’s portfolio was $19,791 and $19,889, respectively. The five largest investments in portfolio companies by fair value in STRS JV totaled $80,787 and $83,564 as of June 30, 2024 and December 31, 2023, 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 June 30, 2024 and December 31, 2023, the Company and STRS Ohio owned approximately 65.71% and 34.29%, respectively, of the LLC equity interests of STRS JV. The Company’s investment in STRS JV consisted of equity contributions of $21,104 and advances of the subordinated notes of $84,416 as of June 30, 2024 and December 31, 2023. As of June 30, 2024 and December 31, 2023, the Company had commitments to fund equity interests and subordinated notes in STRS JV of $23,000 and $92,000, respectively, of which $1,896 and $7,584 were unfunded, respectively. 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 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 enable borrowings in British pounds or euros. On July 15, 2021, the terms of the STRS JV Credit Facility were amended to 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 (i) permanently increase STRS Credit’s availability under the STRS JV 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 On January 13, 2023, the terms of the STRS JV Credit Facility were further amended to (i) permanently increase STRS Credit’s availability under the STRS JV Credit Facility from $225,000 to $262,500 (the “$37.5 Million Increase”) and (ii) apply an annual interest rate equal to applicable SOFR, On May 18, 2023, the terms of the STRS JV Credit Facility were further amended to (i) effective June 6, 2023 apply an annual interest rate equal to applicable SOFR On May 8, 2024, the terms of the STRS JV Credit Facility were further amended to (i) effective May 8, 2024 apply an annual interest rate equal to applicable base rate ​ ​ ​ As of June 30, 2024, the STRS JV Credit Facility had $262,500 of commitments subject to leverage and borrowing base restrictions with an interest rate based on an index rate such as SOFR, EurIBOR or SONIA plus 2.50% or CORRA plus a spread of 2.82%. The final maturity date of the STRS JV Credit Facility is January 19, 2028. As of June 30, 2024, STRS JV had $177,786 of outstanding borrowings and an interest rate outstanding of 7.6% per annum under the STRS JV Credit Facility. As of December 31, 2023, the STRS JV Credit Facility had $262,500 of commitments subject to leverage and borrowing base restrictions with an interest rate based on an index rate such as SOFR plus 2.72%, EurIBOR, SONIA or CDOR plus a spread of 2.35%. The final maturity date of the STRS JV Credit Facility is July 19, 2026. As of December 31, 2023, STRS JV had $165,244 of outstanding borrowings and an interest rate outstanding of 7.7% per annum under the STRS JV Credit Facility. Below is a listing of STRS JV’s individual investments as of June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ Debt Investments ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Advertising ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Forward Solutions, LLC (d/b/a Avision Sales Group) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.98% ​ 02/18/22 ​ 12/15/26 ​ 9,054 ​ $ 8,965 ​ $ 9,054 ​ 25.5 % Forward Solutions, LLC (d/b/a Avision Sales Group) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.98% ​ 03/11/22 ​ 12/15/26 ​ 3,039 ​ ​ 3,009 ​ ​ 3,039 ​ 8.6 ​ Forward Solutions, LLC (d/b/a Avision Sales Group) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.98% ​ 02/18/22 ​ 12/15/26 ​ — ​ ​ — ​ ​ 6 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 11,974 ​ ​ 12,099 ​ 34.1 ​ Air Freight & Logistics ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ITS Buyer Inc. (d/b/a ITS Logistics, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 5.50% ​ 11.09% ​ 02/17/22 ​ 06/15/26 ​ 3,326 ​ ​ 3,297 ​ ​ 3,319 ​ 9.4 ​ ITS Buyer Inc. (d/b/a ITS Logistics, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 5.50% ​ 11.09% ​ 02/17/22 ​ 06/15/26 ​ — ​ ​ — ​ ​ 4 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 3,297 ​ ​ 3,323 ​ 9.4 ​ Broadline Retail ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Marlin DTC-LS Midco 2, LLC (d/b/a Clarus Commerce, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.92% ​ 07/19/19 ​ 07/01/25 ​ 18,810 ​ ​ 18,737 ​ ​ 18,758 ​ 52.9 ​ Marlin DTC-LS Midco 2, LLC (d/b/a Clarus Commerce, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.92% ​ 07/19/19 ​ 07/01/25 ​ — ​ ​ — ​ ​ 1 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 18,737 ​ ​ 18,759 ​ 52.9 ​ Building Products ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Drew Foam Companies Inc ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 7.25% ​ 12.73% ​ 11/09/20 ​ 11/05/25 ​ 13,573 ​ ​ 13,498 ​ ​ 13,449 ​ 37.9 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 13,498 ​ ​ 13,449 ​ 37.9 ​ Construction & Engineering ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc.) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.25% ​ 11.58% ​ 12/21/23 ​ 01/02/29 ​ 3,091 ​ ​ 3,023 ​ ​ 3,037 ​ 8.6 ​ Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc.) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 6.25% ​ 11.58% ​ 12/21/23 ​ 01/02/29 ​ 1,530 ​ ​ 1,497 ​ ​ 1,506 ​ 4.2 ​ Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc.) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.25% ​ 11.58% ​ 12/21/23 ​ 01/02/29 ​ 196 ​ ​ 192 ​ ​ 197 ​ 0.6 ​ Pavement Partners Interco, LLC (d/b/a Pave America, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.22% ​ 03/17/23 ​ 02/07/28 ​ 4,535 ​ ​ 4,435 ​ ​ 4,556 ​ 12.8 ​ Pavement Partners Interco, LLC (d/b/a Pave America, LLC) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.22% ​ 03/17/23 ​ 02/07/28 ​ 572 ​ ​ 559 ​ ​ 575 ​ 1.6 ​ Pavement Partners Interco, LLC (d/b/a Pave America, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.22% ​ 03/17/23 ​ 02/07/28 ​ 307 ​ ​ 300 ​ ​ 311 ​ 0.9 ​ TriplePoint Acquisition Holdings LLC (d/b/a TriplePoint MEP Holdings, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 5.50% ​ 10.83% ​ 06/14/24 ​ 05/31/29 ​ 5,376 ​ ​ 5,270 ​ ​ 5,270 ​ 14.9 ​ TriplePoint Acquisition Holdings LLC (d/b/a TriplePoint MEP Holdings, LLC) (6) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 5.50% ​ 10.83% ​ 06/14/24 ​ 05/31/29 ​ — ​ ​ — ​ ​ — ​ — ​ TriplePoint Acquisition Holdings LLC (d/b/a TriplePoint MEP Holdings, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 5.50% ​ 10.83% ​ 06/14/24 ​ 05/31/29 ​ — ​ ​ — ​ ​ — ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 15,276 ​ ​ 15,452 ​ 43.6 ​ Data Processing & Outsourced Services ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Geo Logic Systems Ltd. (7)(10) ​ First Lien Secured Term Loan ​ 1.00% ​ CORRA ​ 6.50% ​ 11.47% ​ 01/22/20 ​ 12/19/24 ​ 18,686 ​ ​ 14,431 ​ ​ 13,653 ​ 38.5 ​ Geo Logic Systems Ltd. (7)(10) ​ First Lien Secured Revolving Loan ​ 1.00% ​ CORRA ​ 6.50% ​ 11.47% ​ 01/22/20 ​ 12/19/24 ​ — ​ ​ — ​ ​ 3 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 14,431 ​ ​ 13,656 ​ 38.5 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ Distributors ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ APG Lions Purchaser, LLC (d/b/a CF Stinson, Inc.) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.08% ​ 04/26/24 ​ 04/16/30 ​ 4,114 ​ $ 4,054 ​ $ 4,055 ​ 11.4 % APG Lions Purchaser, LLC (d/b/a CF Stinson, Inc.) (6) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.08% ​ 04/26/24 ​ 04/16/30 ​ — ​ ​ — ​ ​ — ​ — ​ APG Lions Purchaser, LLC (d/b/a CF Stinson, Inc.) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.08% ​ 04/26/24 ​ 04/16/30 ​ 69 ​ ​ 68 ​ ​ 68 ​ 0.2 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 4,122 ​ ​ 4,123 ​ 11.6 ​ Diversified Support Services ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pirtek Holdco, LLC (d/b/a Pirtek USA, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.04% ​ 10/31/23 ​ 10/26/28 ​ 7,463 ​ ​ 7,317 ​ ​ 7,367 ​ 20.8 ​ Pirtek Holdco, LLC (d/b/a Pirtek USA, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.04% ​ 10/31/23 ​ 10/26/28 ​ — ​ ​ — ​ ​ 7 ​ — ​ Quest Events, LLC ​ First Lien Secured Term Loan ​ 2.00% ​ SOFR ​ 7.00% ​ 12.60% ​ 07/19/19 ​ 09/30/26 ​ 11,651 ​ ​ 11,613 ​ ​ 11,651 ​ 32.9 ​ Quest Events, LLC ​ First Lien Secured Revolving Loan ​ 2.00% ​ SOFR ​ 7.00% ​ 12.60% ​ 07/19/19 ​ 09/30/26 ​ 247 ​ ​ 246 ​ ​ 248 ​ 0.7 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 19,176 ​ ​ 19,273 ​ 54.4 ​ Drug Retail ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Maxor Acquisition, Inc. (d/b/a Maxor National Pharmacy Services, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.29% ​ 04/11/23 ​ 03/01/29 ​ 5,027 ​ ​ 4,910 ​ ​ 5,078 ​ 14.3 ​ Maxor Acquisition, Inc. (d/b/a Maxor National Pharmacy Services, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.29% ​ 04/11/23 ​ 03/01/29 ​ — ​ ​ — ​ ​ 11 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 4,910 ​ ​ 5,089 ​ 14.3 ​ Electronic Equipment & Instruments ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ LMG Holdings, Inc. ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.00% ​ 11.48% ​ 06/28/21 ​ 04/30/26 ​ 13,261 ​ ​ 13,162 ​ ​ 13,261 ​ 37.4 ​ LMG Holdings, Inc. ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.00% ​ 11.48% ​ 06/28/21 ​ 04/30/26 ​ — ​ ​ — ​ ​ 6 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 13,162 ​ ​ 13,267 ​ 37.4 ​ Environmental & Facilities Services ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Buckeye Acquiror LLC (d/b/a Superior Environmental Solutions, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.94% ​ 08/09/23 ​ 08/01/29 ​ 6,167 ​ ​ 6,035 ​ ​ 6,192 ​ 17.5 ​ Buckeye Acquiror LLC (d/b/a Superior Environmental Solutions, LLC) (6) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.94% ​ 08/09/23 ​ 08/01/29 ​ 898 ​ ​ 877 ​ ​ 902 ​ 2.5 ​ Buckeye Acquiror LLC (d/b/a Superior Environmental Solutions, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.94% ​ 08/09/23 ​ 08/01/29 ​ 271 ​ ​ 265 ​ ​ 283 ​ 0.8 ​ Juniper Landscaping Holdings LLC ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.25% ​ 11.85% ​ 03/01/22 ​ 12/29/26 ​ 11,135 ​ ​ 11,037 ​ ​ 11,135 ​ 31.4 ​ Juniper Landscaping Holdings LLC ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 6.25% ​ 11.85% ​ 03/01/22 ​ 12/29/26 ​ 2,355 ​ ​ 2,334 ​ ​ 2,355 ​ 6.6 ​ Juniper Landscaping Holdings LLC ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.25% ​ 11.85% ​ 03/01/22 ​ 12/29/26 ​ — ​ ​ — ​ ​ 10 ​ — ​ RLJ Pro-Vac, Inc. (d/b/a Pro-Vac) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.25% ​ 11.69% ​ 01/23/24 ​ 12/31/26 ​ 6,692 ​ ​ 6,576 ​ ​ 6,610 ​ 18.6 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (13)(14) ​ First Lien Secured Term Loan ​ 0.50% ​ SOFR ​ 6.75% ​ 12.14% ​ 03/23/23 ​ 09/28/29 ​ 2,807 ​ ​ 2,750 ​ ​ 2,807 ​ 7.9 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (10)(13)(14) ​ First Lien Secured Term Loan ​ 0.50% ​ CORRA ​ 6.75% ​ 11.85% ​ 03/23/23 ​ 09/28/29 ​ 3,873 ​ ​ 2,765 ​ ​ 2,830 ​ 8.0 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (8)(13)(14) ​ First Lien Secured Term Loan ​ 0.00% ​ SONIA ​ 6.75% ​ 12.02% ​ 03/23/23 ​ 09/28/29 ​ 171 ​ ​ 205 ​ ​ 216 ​ 0.6 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (13)(14) ​ First Lien Secured Delayed Draw Loan ​ 0.50% ​ SOFR ​ 6.75% ​ 12.12% ​ 03/23/23 ​ 09/28/29 ​ 582 ​ ​ 570 ​ ​ 582 ​ 1.6 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (8)(13)(14) ​ First Lien Secured Delayed Draw Loan ​ 0.00% ​ SONIA ​ 6.75% ​ 12.02% ​ 03/23/23 ​ 09/28/29 ​ 1,850 ​ ​ 2,288 ​ ​ 2,338 ​ 6.6 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (10)(13)(14) ​ First Lien Secured Delayed Draw Loan ​ 0.50% ​ CORRA ​ 6.75% ​ 11.85% ​ 03/23/23 ​ 09/28/29 ​ 458 ​ ​ 324 ​ ​ 335 ​ 0.9 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (12)(13)(14) ​ First Lien Secured Delayed Draw Loan ​ 0.50% ​ SOFR ​ 6.75% ​ 12.12% ​ 03/23/23 ​ 09/28/29 ​ — ​ ​ — ​ ​ 21 ​ 0.1 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 36,026 ​ ​ 36,616 ​ 103.1 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ Food Distributors ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Clark Restaurant Service, LLC (d/b/a CRS OneSource) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.08% ​ 06/14/24 ​ 05/10/29 ​ 5,031 ​ $ 4,933 ​ $ 4,934 ​ 13.9 % Clark Restaurant Service, LLC (d/b/a CRS OneSource) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.08% ​ 06/14/24 ​ 05/10/29 ​ — ​ ​ — ​ ​ — ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 4,933 ​ ​ 4,934 ​ 13.9 ​ Health Care Supplies ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Art

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	6 Months Ended
	Jun. 30, 2024
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 six months ended June 30, 2024 and year ended December 31, 2023, 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 June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 1 Level 2 Level 3 Total First lien secured loans ​ $ — ​ $ — ​ $ 522,943 ​ $ 522,943 Second lien secured loans ​ — ​ — ​ 5,002 ​ 5,002 Unsecured loans ​ ​ — ​ — ​ 1,261 ​ 1,261 Subordinated Note to STRS JV ​ — ​ — ​ 84,416 ​ 84,416 Equity (excluding STRS JV) ​ — ​ — ​ 23,080 ​ 23,080 Equity in STRS JV (1) ​ — ​ — ​ — ​ 23,303 Total investments ​ $ — ​ $ — ​ $ 636,702 ​ $ 660,005 (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 money market funds (included in cash and cash equivalents and restricted cash and cash equivalents), which were valued at $14,329 as of June 30, 2024, are characterized in Level 1 of the fair value hierarchy. The Company’s forward currency contracts, which were valued at ($7) as of June 30, 2024, are characterized in Level 2 of the fair value hierarchy. The following table presents investments (as shown on the consolidated schedule of investments) that were measured at fair value as of December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 1 Level 2 Level 3 ​ Total First lien secured loans ​ $ — ​ $ — ​ $ 555,878 ​ $ 555,878 Second lien secured loans ​ — ​ — ​ 16,246 ​ 16,246 Unsecured loans ​ ​ — ​ — ​ 167 ​ 167 Subordinated Note to STRS JV ​ — ​ — ​ 84,416 ​ 84,416 Equity (excluding STRS JV) ​ — ​ — ​ 16,679 ​ 16,679 Equity in STRS JV (1) ​ — ​ — ​ — ​ 22,782 Total investments ​ $ — ​ $ — ​ $ 673,386 ​ $ 696,168 (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 money market funds (included in cash and cash equivalents and restricted cash and cash equivalents), which were valued at $11,312 as of December 31, 2023, are characterized in Level 1 of the fair value hierarchy. The Company’s forward currency contracts, which were valued at ($43) as of December 31, 2023, are characterized in Level 2 of the fair value hierarchy. The following table presents the changes in investments measured at fair value using Level 3 inputs for the three and six months ended June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ First Lien Second Lien ​ Subordinated ​ ​ ​ ​ ​ ​ Secured ​ Secured ​ Unsecured ​ Notes to STRS ​ ​ ​ ​ Total Three months ended June 30, 2024 ​ Loans ​ Loans ​ Loans ​ JV ​ Equity ​ Investments Fair value, beginning of period ​ $ 562,269 $ 4,948 $ 1,239 $ 84,416 $ 22,389 ​ $ 675,261 Funding of investments ​ 57,915 — ​ — — 325 ​ 58,240 Non-cash interest income ​ 1,808 — ​ 26 — — ​ 1,834 Accretion of discount ​ 782 2 ​ 1 — — ​ 785 Proceeds from paydowns and sales ​ (97,021) — ​ — — — ​ (97,021) Conversions ​ — — ​ — — — ​ — Realized gains (losses) ​ (212) — ​ — — — ​ (212) Net unrealized appreciation (depreciation) ​ (2,598) 52 ​ (5) — 366 ​ (2,185) Fair value, end of period ​ $ 522,943 $ 5,002 $ 1,261 $ 84,416 $ 23,080 ​ $ 636,702 Change in unrealized appreciation (depreciation) on investments still held as of June 30, 2024 ​ $ (2,651) ​ $ 51 ​ $ (4) ​ $ — ​ $ 369 ​ $ (2,235) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ First Lien Second Lien ​ Subordinated ​ ​ ​ ​ ​ ​ Secured ​ Secured ​ Unsecured ​ Notes to STRS ​ ​ ​ ​ Total Six months ended June 30, 2024 ​ Loans ​ Loans ​ Loans ​ JV ​ Equity ​ Investments Fair value, beginning of period ​ $ 555,878 $ 16,246 $ 167 $ 84,416 $ 16,679 ​ $ 673,386 Funding of investments ​ 116,000 — ​ — — 442 ​ 116,442 Non-cash interest income ​ 3,824 — ​ 42 — — ​ 3,866 Accretion of discount ​ 1,882 17 ​ 2 — — ​ 1,901 Proceeds from paydowns and sales ​ (149,310) (2,040) ​ — — — ​ (151,350) Conversions ​ (8,852) (11,769) ​ 1,053 — 19,568 ​ — Realized gains (losses) ​ (543) (5,817) ​ — — — ​ (6,360) Net unrealized appreciation (depreciation) ​ 4,064 8,365 ​ (3) — (13,609) ​ (1,183) Fair value, end of period ​ $ 522,943 $ 5,002 $ 1,261 $ 84,416 $ 23,080 ​ $ 636,702 Change in unrealized appreciation (depreciation) on investments still held as of June 30, 2024 ​ $ (5,534) ​ $ 96 ​ $ (3) ​ $ — ​ $ (13,609) ​ $ (19,050) ​ ​ The following table presents the changes in investments measured at fair value using Level 3 inputs for the three and six months ended June 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ First Lien Second Lien ​ Subordinated ​ ​ ​ ​ ​ ​ Secured ​ Secured ​ Unsecured ​ Notes to STRS ​ ​ ​ ​ Total Three months ended June 30, 2023 ​ Loans ​ Loans ​ Notes ​ JV ​ Equity ​ Investments Fair value, beginning of period ​ $ 608,477 ​ $ 19,773 $ 167 ​ $ 80,000 ​ $ 20,493 ​ $ 728,910 Funding of investments ​ 27,136 ​ — ​ — ​ 1,472 ​ 782 ​ 29,390 Non-cash interest income ​ 1,687 ​ — ​ — ​ — ​ — ​ 1,687 Accretion of discount ​ 947 ​ 22 ​ — ​ — ​ — ​ 969 Proceeds from paydowns and sales ​ (40,384) ​ — ​ — ​ — ​ (6,605) ​ (46,989) Conversions ​ (3,892) ​ — ​ — ​ — ​ 3,892 ​ — Realized gains (losses) ​ (5) ​ — ​ — ​ — ​ (339) ​ (344) Net unrealized appreciation (depreciation) ​ (1,066) ​ (2,663) ​ — ​ — ​ (2,471) ​ (6,200) Fair value, end of period ​ $ 592,900 ​ $ 17,132 $ 167 ​ $ 81,472 ​ $ 15,752 ​ $ 707,423 Change in unrealized appreciation (depreciation) on investments still held as of June 30, 2023 ​ $ (1,986) ​ $ (2,663) ​ $ — ​ $ — ​ $ (3,281) ​ $ (7,930) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ First Lien Second Lien ​ Subordinated ​ ​ ​ ​ ​ ​ Secured ​ Secured ​ Unsecured ​ Notes to STRS ​ ​ ​ ​ Total Six months ended June 30, 2023 ​ Loans ​ Loans ​ Notes ​ JV ​ Equity ​ Investments Fair value, beginning of period ​ $ 618,267 ​ $ 20,634 $ 167 ​ $ 80,000 ​ $ 21,000 ​ $ 740,068 Funding of investments ​ 64,474 ​ — ​ — ​ 1,472 ​ 783 ​ 66,729 Non-cash interest income ​ 3,668 ​ — ​ — ​ — ​ — ​ 3,668 Accretion of discount ​ 2,027 ​ 43 ​ — ​ — ​ — ​ 2,070 Proceeds from paydowns and sales ​ (88,196) ​ — ​ — ​ — ​ (6,605) ​ (94,801) Conversions ​ (4,537) ​ — ​ — ​ — ​ 4,537 ​ — Realized gains (losses) ​ (100) ​ — ​ — ​ — ​ (339) ​ (439) Net unrealized (depreciation) appreciation ​ (2,703) ​ (3,545) ​ — ​ — ​ (3,624) ​ (9,872) Fair value, end of period ​ $ 592,900 ​ $ 17,132 $ 167 ​ $ 81,472 ​ $ 15,752 ​ $ 707,423 Change in unrealized appreciation (depreciation) on investments still held as of June 30, 2023 ​ $ (3,638) ​ $ (3,545) ​ $ — ​ $ — ​ $ (4,188) ​ $ (11,371) ​ 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 June 30, 2024 and December 31, 2023. 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 ​ ​ June 30, 2024 ​ Techniques ​ Inputs ​ (Weighted Average) (1) First lien secured loans ​ $ 465,887 ​ Discounted cash flow analysis ​ Discount Rate ​ 9.4% - 24.1% (14.4%) ​ ​ ​ 24,335 ​ Recent transaction ​ Transaction Price ​ 97.0 - 100.0 (98.1) ​ ​ ​ 17,626 ​ Enterprise value analysis ​ EBITDA Multiple ​ 4.1 - 7.6 (7.1) ​ ​ ​ 1,024 ​ Enterprise value analysis ​ Revenue Multiple ​ 0.9 - 0.9 (0.9) ​ ​ ​ 13,154 ​ Expected repayment ​ Transaction Price ​ 100.0 - 101.6 (100.6) ​ ​ ​ 917 ​ Option pricing Model ​ Volatility ​ 14.0 - 18.6 (16.6) Second lien secured loans ​ ​ 5,002 ​ Discounted cash flow analysis ​ Discount rate ​ 13.1% - 13.1% (13.1%) Unsecured loans ​ ​ 1,261 ​ Discounted cash flow analysis ​ Discount rate ​ 10.3% - 15.4% (14.8%) Subordinated Notes to STRS JV ​ ​ 84,416 ​ Enterprise value analysis ​ n/a ​ n/a Common equity ​ ​ 2,547 ​ Discounted cash flow analysis ​ Discount rate ​ 15.9% - 20.5% (16.8%) ​ ​ ​ 8,050 ​ Enterprise value analysis ​ EBITDA multiple ​ 5.5 - 13.3 (9.2) ​ ​ ​ 9,409 ​ Enterprise value analysis ​ Revenue Multiple ​ 0.9 - 1.8 (1.8) ​ ​ ​ 865 ​ Recent transaction ​ Transaction price ​ 5.0 - 5.0 (1.8) Preferred equity ​ ​ 648 ​ Discounted cash flow analysis ​ Discount rate ​ 22.4% - 22.4% (22.4%) ​ ​ ​ 405 ​ Enterprise value analysis ​ EBITDA multiple ​ 6.0 - 10.5 (8.5) ​ ​ ​ 1,088 ​ Enterprise value analysis ​ Revenue Multiple ​ 0.9 - 0.9 (0.9) Warrant ​ ​ 68 ​ Discounted cash flow analysis ​ Discount rate ​ 20.5% - 20.5% (20.5%) Total Level 3 Investments ​ $ 636,702 ​ ​ ​ ​ ​ ​ (1) Unobservable inputs were weighted by the relative fair value of the investments. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value as of ​ Valuation ​ Unobservable ​ Range Investment Type ​ ​ December 31, 2023 ​ Techniques ​ Inputs ​ (Weighted Average)(1) First lien secured loans ​ $ 510,739 ​ Discounted cash flow analysis ​ Discount rate ​ 11.0% - 30.3% (13.9%) ​ ​ ​ 34,016 ​ Recent transaction ​ Transaction price ​ 89.0 - 98.8 (96.2) ​ ​ ​ 10,477 ​ Enterprise value analysis ​ EBITDA multiple ​ 8.6 - 8.6 (8.6) ​ ​ ​ 646 ​ Option pricing Model ​ Volatility ​ 17.2 - 17.2 (17.2) Second lien secured loans ​ ​ 14,645 ​ Discounted cash flow analysis ​ Discount rate ​ 12.6% - 24.0% (20.2%) ​ ​ ​ 1,601 ​ Enterprise value analysis ​ EBITDA multiple ​ 6.3 - 6.3 (6.3) Unsecured loans ​ ​ 167 ​ Enterprise value analysis ​ EBITDA multiple ​ 7.1 - 7.1 (7.1) Subordinated Notes to STRS JV ​ ​ 84,416 ​ Enterprise value analysis ​ n/a ​ n/a Common equity ​ ​ 3,175 ​ Discounted cash flow analysis ​ Discount rate ​ 14.7% - 30.3% (16.6%) ​ ​ ​ 6,927 ​ Enterprise value analysis ​ EBITDA multiple ​ 5.5 - 13.2 (8.8) ​ ​ ​ 709 ​ Recent transaction ​ Transaction price ​ 1.0 - 1.0 (1.0) Preferred equity ​ ​ 832 ​ Discounted cash flow analysis ​ Discount rate ​ 29.9% - 30.3% (29.9%) ​ ​ ​ 1,511 ​ Enterprise value analysis ​ EBITDA multiple ​ 6.0 - 10.5 (6.7) Warrant ​ ​ 3,525 ​ Discounted cash flow analysis ​ Discount rate ​ 26.2% - 30.2% (26.3%) Total Level 3 Investments ​ $ 673,386 ​ ​ ​ ​ ​ ​ (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 June 30, 2024 and December 31, 2023. 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 June 30, 2024, and December 31, 2023 the Credit Facility approximates its carrying value presented net of unamortized debt issuance costs and original issuance discount, net of accretion As of June 30, 2024 and December 31, 2023, the fair value of the 7.875% notes due 2028 (the “ 7.875% 2028 Notes”) were estimated using a combination of discounted future cash flows to the valuation date and the carrying value presented net of unamortized debt issuance costs and original issuance discount, net of accretion. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of June 30, 2024 ​ As of December 31, 2023 ​ ​ Fair ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Value Level Principal Amount Outstanding Fair Value Principal Amount Outstanding Fair Value JPM Credit Facility 3 ​ $ 168,116 ​ $ 166,949 ​ $ 196,512 ​ $ 194,926 5.375% 2025 Notes 3 ​ 40,000 ​ 38,557 ​ ​ 40,000 ​ ​ 38,369 5.375% 2026 Notes ​ 3 ​ ​ 10,000 ​ ​ 9,356 ​ 10,000 ​ 9,365 4.000% 2026 Notes 3 ​ 75,000 ​ 67,866 ​ 75,000 ​ 67,511 5.625% 2027 Notes 3 ​ 10,000 ​ 9,199 ​ ​ 10,000 ​ 9,261 4.250% 2028 Notes ​ 3 ​ ​ 25,000 ​ 21,257 ​ ​ 25,000 ​ ​ 21,379 7.875% 2028 Notes ​ 3 ​ ​ 34,500 ​ ​ 34,021 ​ ​ 34,500 ​ 34,365 ​ ​ ​ ​ $ 362,616 ​ $ 347,205 ​ $ 391,012 ​ $ 375,176 ​

BORROWINGS

BORROWINGS	6 Months Ended
	Jun. 30, 2024
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 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 June 30, 2024 and December 31, 2023, the Company’s asset coverage for borrowed amounts were 186.2% and 181.0%, respectively. Total borrowings outstanding and available as of June 30, 2024, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Maturity Rate Principal Amount Outstanding Amortized Cost Available JPM Credit Facility (1) 11/22/2025 S+2.500 % $ 168,116 ​ $ 166,949 ​ $ 166,884 5.375% 2025 Notes 10/20/2025 5.375 % 40,000 ​ 39,826 ​ — 5.375% 2026 Notes 12/4/2026 5.375 % 10,000 ​ 9,929 ​ — 4.000% 2026 Notes 12/15/2026 4.000 % 75,000 ​ 74,162 ​ — 5.625% 2027 Notes 12/4/2027 5.625 % 10,000 ​ 9,914 ​ — 4.250% 2028 Notes ​ 12/6/2028 ​ 4.250 % ​ 25,000 ​ ​ 24,770 ​ ​ — 7.875% 2028 Notes ​ 9/15/2028 ​ 7.875 % ​ 34,500 ​ ​ 33,346 ​ ​ — Total debt ​ ​ ​ ​ $ 362,616 ​ $ 358,896 ​ $ 166,884 (1) All foreign denominated principal borrowings have been converted to USD using the exchange rates as of the applicable reporting date. ​ Total borrowings outstanding and available as of December 31, 2023, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Maturity Rate Principal Amount Outstanding Amortized Cost Available JPM Credit Facility (1) 11/22/2025 S+2.500 % $ 196,512 ​ $ 194,926 ​ $ 138,488 5.375% 2025 Notes 10/20/2025 5.375 % 40,000 ​ 39,761 ​ — 5.375% 2026 Notes 12/4/2026 5.375 % 10,000 ​ 9,914 ​ — 4.000% 2026 Notes 12/15/2026 4.000 % 75,000 ​ 73,992 ​ — 5.625% 2027 Notes 12/4/2027 5.625 % 10,000 ​ 9,901 ​ — 4.250% 2028 Notes ​ 12/6/2028 ​ 4.250 % ​ 25,000 ​ ​ 24,745 ​ ​ — 7.875% 2028 Notes ​ 9/15/2028 ​ 7.875 % ​ 34,500 ​ ​ 33,209 ​ ​ — Total debt ​ ​ ​ ​ $ 391,012 ​ $ 386,448 ​ $ 138,488 (1) All foreign denominated principal borrowings have been converted to USD using the exchange rates as of the applicable reporting date. ​ Credit Facility On April 28, 2021, the terms of the Credit Facility were amended and restated to enable WhiteHorse Credit to borrow in British Pounds or Euros. On July 15, 2021, the terms of the Credit Facility were amended to 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 establish 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 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 (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 (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. On April 12, 2023, the terms of the Credit Facility were further amended to (i) apply an annual interest rate equal to the applicable base rate plus 2.50% to any USD denominated borrowings, and (ii) convert to SOFR for USD denominated borrowings effective June 6, 2023. The Credit Facility bears interest at SOFR plus 2.50% on all outstanding USD denominated borrowings. The Credit Facility bears interest at EurIBOR for EUR denominated borrowings, CDOR for CAD denominated borrowings, SONIA for GBP denominated borrowings, 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 $529,071 as of June 30, 2024. 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 June 30, 2024, the Company had $168,116 in outstanding borrowings and $166,884 undrawn under the Credit Facility. Weighted average outstanding borrowings were $191,466 and $197,486 at a weighted average interest rate of 7.82% and 7.83% for the three and six months ended June 30, 2024, respectively. As of June 30, 2024, the interest rate in effect on outstanding borrowings was 7.81%. 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 June 30, 2024, $166,884 was available to be drawn by the Company based on these requirements. As of December 31, 2023, the Company had $196,512 in outstanding borrowings and $138,488 undrawn under the Credit Facility. For the year ended December 31, 2023, weighted average outstanding borrowings were $236,969 at a weighted average interest rate of 7.58%. As of December 31, 2023, the interest rate in effect on outstanding borrowings was 7.87%. 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, 2023, $138,488 was available to be drawn by the Company based on these requirements. ​ 5.375% 2025 Notes 5.375% 2026 Notes 4.000% 2026 Notes are direct unsecured obligations and are structurally subordinate to borrowings under the Credit Facility and will rank pari passu with all outstanding and future unsecured unsubordinated indebtedness 5.625% 2027 Notes 4.250% 2028 Notes 7.875% 2028 Notes securities and repay outstanding indebtedness under its revolving credit facility. Additionally, the offering included an overallotment feature for up to an additional $4,500 of aggregate principal amount under the same terms as the initial offering. On August 31, 2023, the underwriters fully exercised their option to purchase an additional $4,500, bringing the aggregate principal amount of the 7.875% 2028 Notes to $34,500. Interest on the 7.875% 2028 Notes is paid quarterly on March 15, June 15, September 15 and December 15 each year, at an annual rate of 7.875%. The 7.875% 2028 Notes will mature on September 15, 2028 and may be redeemed in whole or in part at any time, or from time to time, at the Company’s option on or after September 15, 2025. The 7.875% 2028 Notes are direct unsecured obligations and are structurally subordinate to borrowings under the Credit Facility and will rank pari passu with all outstanding and future unsecured unsubordinated indebtedness we may issue. The 7.875% 2028 Notes are listed on the Nasdaq Global Select Market under the trading symbol “WHFCL.” 6.000% 2023 Notes : On July 13, 2018, the Company entered into an agreement (the “2023 Note Purchase Agreement”) to sell in a private offering $30,000 aggregate principal amount of senior unsecured notes to qualified institutional investors in reliance on Section 4(a)(2) of the Securities Act of 1933, as amended. Interest on the 6.000% 2023 Notes was payable semiannually on February 7 and August 7, at a fixed, annual rate of 6.00% . This interest rate was subject to increase (up to 6.50% ) in the event that, subject to certain exceptions, the 6.000% 2023 Notes cease to have an investment grade rating. The 6.000% 2023 Notes were general unsecured obligations of the Company that ranked pari passu with all outstanding and future unsecured unsubordinated indebtedness issued by the Company. The closing of the transaction occurred on August 7, 2018. On August 7, 2023, the 6.000% 2023 Notes matured and were fully repaid by the Company.

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	6 Months Ended
	Jun. 30, 2024
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 Effective January 1, 2024, the base management fee is calculated at an annual rate equal to 1.75% 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. Prior to January 1, 2024, the base management fee is calculated at an annual rate of 2.00% 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 three and six months ended June 30, 2024 and 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended June 30, ​ ​ Six months ended June 30, Management Fee ($ in thousands) ​ 2024 ​ ​ 2023 ​ 2024 ​ ​ 2023 Base management fee ​ $ 3,065 ​ $ 3,705 ​ $ 6,182 ​ $ 7,416 Total management fees ​ $ 3,065 ​ $ 3,705 ​ $ 6,182 ​ $ 7,416 ​ As of June 30, 2024 and December 31, 2023, management fees payable on the consolidated statements of assets and liabilities were $3,065 and $3,595 , 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 three and six months ended June 30, 2024 and 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended June 30, ​ ​ Six months ended June 30, Performance-based Incentive Fee ($ in thousands) ​ 2024 ​ ​ 2023 ​ 2024 ​ ​ 2023 Income incentive fee ​ $ 2,323 ​ $ 2,648 ​ $ 5,026 ​ $ 5,324 Capital gains incentive fee ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total performance-based incentive fees ​ $ 2,323 ​ $ 2,648 ​ $ 5,026 ​ $ 5,324 ​ As of June 30, 2024 and December 31, 2023, incentive fees payable on the consolidated statements of assets and liabilities were $14,630 and $10,470, 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 the three and six months ended June 30, 2024, the Company incurred $170 and $341 of allocated administrative service fees, respectively. During the three and six months ended June 30, 2023, the Company incurred $170 and $341 of allocated administrative service fees, respectively. Co-investments with Related Parties As of June 30, 2024 and December 31, 2023, certain funds affiliated with WhiteHorse Advisers and its related entities maintained co-investments in the Company’s or STRS JV’s investments of $5,645,610 and $4,977,275, respectively. STRS JV

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	6 Months Ended
	Jun. 30, 2024
COMMITMENTS AND CONTINGENCIES
COMMITMENTS AND CONTINGENCIES	NOTE 8 - COMMITMENTS AND CONTINGENCIES Commitments The balance of unfunded commitments to extend credit was $24,689 and $21,440 as of June 30, 2024 and December 31, 2023, respectively. Commitments to extend credit consist principally of the unused portions of commitments that obligate the Company to extend credit, such as revolving credit arrangements or similar transactions. These commitments are often subject to financial or non-financial milestones and other conditions to borrow that must be achieved before the commitment can be drawn. In addition, the commitments generally have fixed expiration dates or other termination clauses. Since commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. ​ The following table summarizes the Company’s unfunded commitments as of June 30, 2024 and December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ Unfunded Commitments ($ in thousands) As of June 30, 2024 As of December 31, 2023 Revolving Loan Commitments: ​ ​ ​ ​ ​ ​ Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.) ​ $ — ​ $ 447 Branford Filtration, LLC (d/b/a Clean Solutions Group) ​ ​ 387 ​ ​ 387 Bridgepoint Healthcare, LLC ​ ​ 1,350 ​ ​ 1,588 BUSA Acquisition Co. (d/b/a BankCard USA Merchant Services Inc.) ​ ​ 184 ​ ​ — Claridge Products and Equipment, LLC ​ ​ 70 ​ ​ 351 Coastal Television Broadcasting Group LLC ​ ​ 309 ​ ​ 309 EducationDynamics, LLC ​ ​ 1,199 ​ ​ 1,199 Gulf Winds International Acquisition LLC (d/b/a Gulf Winds International, Inc.) ​ ​ 485 ​ ​ 647 HC Salon Holdings, Inc. (d/b/a Hair Cuttery) ​ ​ 700 ​ ​ 700 Leviathan Intermediate Holdco, LLC ​ ​ 570 ​ ​ 570 Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC) ​ ​ 305 ​ ​ 572 Motivational Marketing, LLC (d/b/a Motivational Fulfillment) ​ ​ — ​ ​ 709 MSI Information Services, Inc. ​ ​ 225 ​ ​ 225 M&M OpCo. LLC (d/b/a Escalent, Inc.) ​ ​ 238 ​ ​ 238 Naviga Inc. (f/k/a Newscycle Solutions, Inc.) ​ ​ — ​ ​ 30 PANOS Brands, LLC ​ ​ 412 ​ ​ — Ribbon Communications Operating Company, Inc. (d/b/a Ribbon Communications Inc.) ​ ​ 880 ​ ​ — PLTFRM Companies, LLC ​ ​ 176 ​ ​ — Salon Republic Holdings, LLC (d/b/a Salon Republic, LLC) ​ ​ 861 ​ ​ 610 Sleep OpCo LLC (d/b/a Brooklyn Bedding LLC) ​ ​ 2,646 ​ ​ 2,646 Telestream Holdings Corporation ​ ​ 222 ​ ​ 87 The Kyjen Company, LLC (d/b/a Outward Hound) ​ ​ 798 ​ ​ 798 TOT Group, Inc. (d/b/a Net Element Inc.) ​ ​ 553 ​ ​ — Zephyr Buyer, L.P. (d/b/a The Weather Company, LLC) ​ ​ 1,806 ​ ​ — Total unfunded revolving loan commitments ​ ​ 14,376 ​ ​ 12,113 ​ ​ ​ ​ ​ ​ ​ Delayed Draw Loan Commitments: ​ ​ ​ ​ ​ ​ Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC) ​ ​ 1,422 ​ ​ — Avision Holdings, LLC (d/b/a Avision Sales Group) ​ ​ 2,311 ​ ​ — Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc.) ​ ​ — ​ ​ 140 Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.) ​ ​ — ​ ​ 895 Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC) ​ ​ 245 ​ ​ 648 Monarch Collective Holdings, LLC ​ ​ 3,124 ​ ​ — Salon Republic Holdings, LLC (d/b/a Salon Republic, LLC) ​ ​ 2,104 ​ ​ 1,407 StoicLane MidCo, LLC (d/b/a StoicLane Inc.) ​ ​ — ​ ​ 6,237 TOT Group, Inc. (d/b/a Net Element Inc.) ​ ​ 1,107 ​ ​ — Total unfunded delayed draw loan commitments ​ ​ 10,313 ​ ​ 9,327 Total Unfunded Commitments ​ $ 24,689 ​ $ 21,440 ​ As of June 30, 2024 and December 31, 2023, the Company had commitments to fund equity interests and subordinated notes in STRS JV of $23,000 and $92,000, respectively, of which $1,896 and $7,584 were unfunded, respectively. 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	6 Months Ended
	Jun. 30, 2024
STOCKHOLDERS' EQUITY
STOCKHOLDERS' EQUITY	NOTE 9 - STOCKHOLDERS’ EQUITY On March 31, 2023, the Company launched an “at-the-market” offering (the “ATM Program”) by entering into an Equity Distribution Agreement with B. Riley Securities, Inc. pursuant to which the Company may offer and sell, from time to time, through B. Riley Securities, Inc., as the sales agent, shares of its common stock having an aggregate offering amount of up to $35,000. ​ On March 15, 2021, the Company previously launched an ATM Program by entering into an Equity Distribution Agreement with Raymond James & Associates, Inc. pursuant to which the Company would 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. Through the Equity Distribution Agreement with Raymond James & Associates, Inc., the Company sold 276,300 shares of its common stock 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. The Company’s Equity Distribution Agreement with Raymond James & Associates, Inc. is no longer effective. ​ No shares were issued pursuant to the ATM program during the three and six months ended June 30, 2024 and 2023, respectively. ​

FINANCIAL HIGHLIGHTS

FINANCIAL HIGHLIGHTS	6 Months Ended
	Jun. 30, 2024
FINANCIAL HIGHLIGHTS
FINANCIAL HIGHLIGHTS	NOTE 10 - FINANCIAL HIGHLIGHTS The following is a schedule of financial highlights: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, ​ ​ 2024 2023 Per share data: (1) ​ ​ ​ Net asset value, beginning of period ​ $ 13.63 $ 14.30 ​ Net investment income ​ 0.86 ​ 0.92 ​ Net realized and unrealized gains (losses) on investments and foreign currency transactions ​ ​ (0.27) ​ ​ (0.43) ​ Net increase in net assets resulting from operations ​ 0.59 ​ 0.49 ​ Distributions declared from net investment income ​ (0.77) ​ (0.79) ​ Net asset value, end of period ​ $ 13.45 $ 14.00 ​ Total annualized return based on market value (2) ​ (0.49) % ​ (3.40) % Total annualized return based on net asset value ​ 8.72 % ​ 6.89 % Net assets, end of period ​ $ 312,682 ​ $ 325,296 ​ Per share market value at end of period ​ $ 12.27 ​ $ 12.83 ​ Shares outstanding end of period ​ 23,243,088 ​ 23,243,088 ​ Ratios/Supplemental Data: (3) ​ ​ ​ Ratio of expenses before incentive fees to average net assets (4) ​ 15.04 % 15.22 % Ratio of incentive fees to average net assets ​ 3.17 % 3.22 % Ratio of total expenses to average net assets (4) ​ 18.21 % 18.44 % Ratio of net investment income to average net assets (4) ​ 12.69 % 12.89 % Portfolio turnover ratio ​ 17.01 % 8.75 % (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	6 Months Ended
	Jun. 30, 2024
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: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended June 30, ​ Six Months Ended June 30, ($ in thousands except share and per share amounts) 2024 2023 2024 2023 Net increase in net assets resulting from operations ​ $ 7,839 ​ $ 3,881 ​ $ 13,808 ​ $ 11,387 Weighted average shares outstanding ​ 23,243,088 ​ 23,243,088 ​ 23,243,088 ​ 23,243,088 Basic and diluted per share net increase in net assets resulting from operations ​ $ 0.34 ​ $ 0.17 ​ $ 0.59 ​ $ 0.49 ​

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	6 Months Ended
	Jun. 30, 2024
SUBSEQUENT EVENTS
SUBSEQUENT EVENTS	NOTE 12 - SUBSEQUENT EVENTS Management has evaluated events that have occurred after the balance sheet date but before the consolidated financial statements are issued and has determined that there were no additional subsequent events requiring adjustment or disclosure in the consolidated financial statements.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ 7,839	$ 3,881	$ 13,808	$ 11,387

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Jun. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

N-2

N-2 - $ / shares	6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Cover [Abstract]
Entity Central Index Key	0001552198
Amendment Flag	false
Securities Act File Number	814-00967
Document Type	10-Q
Entity Registrant Name	WHITEHORSE FINANCE, INC
Entity Address, Address Line One	1450 Brickell Avenue
Entity Address, Address Line Two	31st Floor
Entity Address, City or Town	Miami
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33131
City Area Code	305
Local Phone Number	381-6999
Entity Emerging Growth Company	false
General Description of Registrant [Abstract]
Investment Objectives and Practices [Text Block]	Our investment activities are managed by WhiteHorse Advisers and are supervised by our board of directors, a majority of whom are independent of us, WhiteHorse Advisers and its affiliates. Under the Investment Advisory Agreement, we have agreed to pay WhiteHorse Advisers an annual base management fee based on our average consolidated gross assets as well as an incentive fee based on our investment performance. Under our Administration Agreement, we have agreed to reimburse WhiteHorse Administration for our allocable portion (subject to the review and approval of our independent directors) of overhead and other expenses incurred by WhiteHorse Administration in performing its obligations under the Administration Agreement.
Risk Factors [Table Text Block]	Item 1A. Risk Factors You should carefully consider the “Risk Factors” discussed in our most recent Annual Report on Form 10-K which could materially affect our business, financial condition and/or operating results. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially affect our business, financial condition and/or operating results.
Share Price	$ 12.27		$ 12.83
NAV Per Share	$ 13.45	$ 13.63	$ 14	$ 14.30

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	6 Months Ended
	Jun. 30, 2024
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-Q 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 Fair Value Measurements and Disclosures. with ASC Topic 820, the Company has categorized its financial instruments carried at fair value, based on the priority of the valuation technique, into a three-level fair value hierarchy. Fair value is a market-based measure considered from the perspective of the market participant who holds the financial instrument. Therefore, when market assumptions are not readily available, the Company’s own assumptions are set to reflect those that management believes market participants would use in pricing the financial instrument at the measurement date. 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 income and realized net short-term capital gains in excess of realized net long-term capital losses, if any, out of the assets legally available for distribution. In addition, the Company will incur a nondeductible excise tax equal to 4% of the amount by which (1) 98% of ordinary income for the calendar year (taking into account certain deferrals and elections), (2) 98.2% of capital gains in excess of capital losses, adjusted for certain ordinary losses, for the one-year period ending on October 31 of the calendar year and (3) any ordinary income and capital gain income for preceding years that were not distributed during such years and on which the Company incurred no U.S. federal income tax exceed distributions for the year. The Company accrues estimated excise tax on the amount, if any, that estimated taxable income is expected to exceed the level of stockholder distributions described above. 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 June 30, 2024 and December 31, 2023. 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 June 30, 2024 or December 31, 2023. 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 2020 remain subject to examination by the Internal Revenue Service. As of June 30, 2024 and December 31, 2023, the cost of investments for federal income tax purposes was $721,765 and $751,117 resulting in net unrealized depreciation of $61,760 and $54,949, respectively. This is comprised of gross unrealized appreciation of $28,476 and $6,881 and gross unrealized depreciation of $90,236 and $61,830, on a tax basis, as of June 30, 2024 and December 31, 2023, respectively.
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 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 In November 2023, the FASB issued ASU 2023-07 “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures,” or ASU 2023-07. ASU 2023-07 enhances the disclosures required for reportable segments on an annual and interim basis. ASU 2023-07 is effective on a retrospective basis for annual periods beginning after December 15, 2023, for interim periods within fiscal years beginning after December 15, 2024, and early adoption is permitted. We do not expect the adoption of ASU 2023-07 to have a material impact on our consolidated financial statements .

FORWARD CURRENCY CONTRACTS (Tab

FORWARD CURRENCY CONTRACTS (Tables)	6 Months Ended
	Jun. 30, 2024
FORWARD CURRENCY CONTRACTS
Schedule of forward currency contracts	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended June 30, ​ ​ ​ Six months ended June 30, ($ in thousands) ​ ​ 2024 ​ ​ 2023 ​ ​ 2024 ​ ​ 2023 Realized gain (loss) on forward currency contracts ​ $ 28 ​ $ 4 ​ ​ $ — ​ $ (3) Unrealized appreciation (depreciation) on forward currency contracts ​ ​ (16) ​ ​ (12) ​ ​ ​ 36 ​ ​ (6) Total net realized and unrealized gains (losses) on forward currency contracts ​ $ 12 ​ $ (8) ​ ​ $ 36 ​ $ (9)
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$ 1,619 CAD ​ $ 1,177 USD ​ 8/7/24 ​ $ — ​ $ (7) Total ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ — ​ $ (7) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Counterparty ​ Currency to be sold Currency to be purchased Settlement date Unrealized appreciation Unrealized depreciation Morgan Stanley ​ ​ C$ 1,253 CAD ​ $ 903 USD ​ 2/7/24 ​ $ — ​ $ (43) Total ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ — ​ $ (43)
Schedule of notional exposure to foreign currency forward contracts	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended June 30, ​ Six months ended June 30, Average USD notional outstanding ​ 2024 ​ ​ 2023 ​ 2024 ​ ​ 2023 Forward currency contracts ​ $ 1,208 ​ $ 401 ​ $ 1,157 ​ $ 395
Schedule of master netting agreement	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of June 30, 2024 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) ​ $ — ​ $ 7 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 7 Total ​ $ — ​ $ 7 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 7 ​ (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, 2023 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) ​ $ — ​ $ 43 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 43 Total ​ $ — ​ $ 43 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 43 (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)	6 Months Ended
	Jun. 30, 2024
Schedule of Investments [Line Items]
Schedule of individual investments	Investments consisted of the following : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of June 30, 2024 ​ As of December 31, 2023 ​ Amortized Cost Fair Value Amortized Cost Fair Value First lien secured loans ​ $ 547,482 ​ $ 522,943 ​ $ 584,480 ​ $ 555,878 Second lien secured loans ​ 4,949 ​ 5,002 ​ 24,558 ​ 16,246 Unsecured loans ​ ​ 1,264 ​ 1,261 ​ ​ 167 ​ 167 Subordinated Note to STRS JV ​ 84,416 ​ 84,416 ​ 84,416 ​ 84,416 Equity (excluding STRS JV) ​ 45,306 ​ 23,080 ​ 25,296 ​ 16,679 Equity in STRS JV ​ 21,104 ​ 23,303 ​ 21,104 ​ 22,782 Total ​ $ 704,521 ​ $ 660,005 ​ $ 740,021 ​ $ 696,168 ​ ​ The following table shows the portfolio composition by industry grouping at fair value: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Industry ($ in thousands) ​ As of June 30, 2024 ​ As of December 31, 2023 ​ Advertising $ 14,732 2.7 % $ 5,285 0.9 % Air Freight & Logistics ​ ​ 27,841 ​ 5.0 ​ ​ 22,616 ​ 3.8 ​ Alternative Carriers ​ ​ 13,621 ​ 2.5 ​ ​ 13,191 ​ 2.2 ​ Application Software ​ ​ 32,378 ​ 5.9 ​ ​ 34,202 ​ 5.8 ​ Automotive Retail ​ ​ — ​ — ​ ​ 12,407 ​ 2.1 ​ Broadcasting ​ ​ 8,338 ​ 1.5 ​ ​ 7,243 ​ 1.3 ​ Broadline Retail ​ ​ 21,868 ​ 4.0 ​ ​ 36,672 ​ 6.2 ​ Building Products ​ ​ 14,905 ​ 2.7 ​ ​ 15,863 ​ 2.7 ​ Cable & Satellite ​ ​ — ​ — ​ ​ 20,969 ​ 3.6 ​ Commodity Chemicals ​ ​ 30,239 ​ 5.5 ​ ​ 30,712 ​ 5.2 ​ Communications Equipment ​ ​ 8,625 ​ 1.6 ​ ​ — ​ — ​ Construction & Engineering ​ ​ 993 ​ 0.2 ​ ​ 541 ​ 0.1 ​ Construction Materials ​ ​ 6,306 ​ 1.1 ​ ​ 6,901 ​ 1.2 ​ Data Processing & Outsourced Services ​ ​ 29,541 ​ 5.3 ​ ​ 21,480 ​ 3.6 ​ Distributors ​ ​ 11,845 ​ 2.1 ​ ​ 12,475 ​ 2.1 ​ Diversified Chemicals ​ ​ 4,235 ​ 0.8 ​ ​ 10,259 ​ 1.8 ​ Diversified Financial Services ​ ​ — ​ — ​ ​ 3,472 ​ 0.6 ​ Diversified Support Services ​ ​ 9,423 ​ 1.7 ​ ​ 9,607 ​ 1.6 ​ Education Services ​ ​ 11,886 ​ 2.2 ​ ​ 12,570 ​ 2.1 ​ Electric Utilities ​ ​ 16,083 ​ 2.9 ​ ​ 15,954 ​ 2.7 ​ Environmental & Facilities Services ​ ​ 23,421 ​ 4.2 ​ ​ 23,878 ​ 4.1 ​ Food Distributors ​ ​ 317 ​ 0.1 ​ ​ — ​ — ​ Health Care Facilities ​ ​ 8,867 ​ 1.6 ​ ​ 8,966 ​ 1.5 ​ Health Care Services ​ ​ 10,484 ​ 1.9 ​ ​ 17,643 ​ 3.0 ​ Health Care Supplies ​ ​ 18,768 ​ 3.4 ​ ​ 18,983 ​ 3.2 ​ Heavy Electrical Equipment ​ ​ 10,179 ​ 1.8 ​ ​ 10,135 ​ 1.7 ​ Home Furnishings ​ ​ 27,653 ​ 5.0 ​ ​ 27,508 ​ 4.7 ​ Household Appliances ​ ​ 5,402 ​ 1.0 ​ ​ 5,966 ​ 1.0 ​ Household Products ​ ​ 10,870 ​ 2.0 ​ ​ 10,873 ​ 1.8 ​ Industrial Machinery & Supplies & Components ​ ​ 1,253 ​ 0.2 ​ ​ 6,417 ​ 1.1 ​ Interactive Media & Services ​ ​ 22,932 ​ 4.2 ​ ​ 9,363 ​ 1.6 ​ Investment Banking & Brokerage ​ ​ — ​ — ​ ​ 3,522 ​ 0.6 ​ IT Consulting & Other Services ​ ​ 6,224 ​ 1.1 ​ ​ 6,549 ​ 1.1 ​ Leisure Facilities ​ ​ 24,181 ​ 4.4 ​ ​ 22,619 ​ 3.8 ​ Leisure Products ​ ​ 15,502 ​ 2.8 ​ ​ 12,738 ​ 2.2 ​ Life Sciences Tools & Services ​ ​ 5,002 ​ 0.9 ​ ​ 4,901 ​ 0.8 ​ Office Services & Supplies ​ ​ 9,441 ​ 1.7 ​ ​ 21,253 ​ 3.6 ​ Packaged Foods & Meats ​ ​ 4,009 ​ 0.7 ​ ​ — ​ — ​ Paper & Plastic Packaging Products & Materials ​ ​ 61 ​ — ​ ​ 179 ​ — ​ Real Estate Development ​ ​ — ​ — ​ ​ 10,239 ​ 1.8 ​ Real Estate Operating Companies ​ ​ 6,581 ​ 1.1 ​ ​ 6,539 ​ 1.2 ​ Real Estate Services ​ ​ 10,083 ​ 1.8 ​ ​ — ​ — ​ Research & Consulting Services ​ ​ — ​ — ​ ​ 16,081 ​ 2.7 ​ Security & Alarm Services ​ ​ 6,930 ​ 1.3 ​ ​ — ​ — ​ Specialized Consumer Services ​ ​ 23,339 ​ 4.2 ​ ​ 23,931 ​ 4.1 ​ Specialized Finance (1) ​ ​ — ​ — ​ ​ — ​ — ​ Systems Software ​ ​ 11,809 ​ 2.1 ​ ​ 11,523 ​ 2.0 ​ Technology Hardware, Storage & Peripherals ​ ​ 18,065 ​ 3.3 ​ ​ 16,745 ​ 2.8 ​ Transaction & Payment Processing Services ​ ​ 8,054 ​ 1.5 ​ ​ — ​ — ​ Total (1) ​ $ 552,286 ​ 100.0 % $ 588,970 ​ 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 June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ Debt Investments ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Advertising ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Forward Solutions, LLC (d/b/a Avision Sales Group) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.98% ​ 02/18/22 ​ 12/15/26 ​ 9,054 ​ $ 8,965 ​ $ 9,054 ​ 25.5 % Forward Solutions, LLC (d/b/a Avision Sales Group) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.98% ​ 03/11/22 ​ 12/15/26 ​ 3,039 ​ ​ 3,009 ​ ​ 3,039 ​ 8.6 ​ Forward Solutions, LLC (d/b/a Avision Sales Group) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.98% ​ 02/18/22 ​ 12/15/26 ​ — ​ ​ — ​ ​ 6 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 11,974 ​ ​ 12,099 ​ 34.1 ​ Air Freight & Logistics ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ITS Buyer Inc. (d/b/a ITS Logistics, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 5.50% ​ 11.09% ​ 02/17/22 ​ 06/15/26 ​ 3,326 ​ ​ 3,297 ​ ​ 3,319 ​ 9.4 ​ ITS Buyer Inc. (d/b/a ITS Logistics, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 5.50% ​ 11.09% ​ 02/17/22 ​ 06/15/26 ​ — ​ ​ — ​ ​ 4 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 3,297 ​ ​ 3,323 ​ 9.4 ​ Broadline Retail ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Marlin DTC-LS Midco 2, LLC (d/b/a Clarus Commerce, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.92% ​ 07/19/19 ​ 07/01/25 ​ 18,810 ​ ​ 18,737 ​ ​ 18,758 ​ 52.9 ​ Marlin DTC-LS Midco 2, LLC (d/b/a Clarus Commerce, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.92% ​ 07/19/19 ​ 07/01/25 ​ — ​ ​ — ​ ​ 1 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 18,737 ​ ​ 18,759 ​ 52.9 ​ Building Products ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Drew Foam Companies Inc ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 7.25% ​ 12.73% ​ 11/09/20 ​ 11/05/25 ​ 13,573 ​ ​ 13,498 ​ ​ 13,449 ​ 37.9 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 13,498 ​ ​ 13,449 ​ 37.9 ​ Construction & Engineering ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc.) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.25% ​ 11.58% ​ 12/21/23 ​ 01/02/29 ​ 3,091 ​ ​ 3,023 ​ ​ 3,037 ​ 8.6 ​ Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc.) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 6.25% ​ 11.58% ​ 12/21/23 ​ 01/02/29 ​ 1,530 ​ ​ 1,497 ​ ​ 1,506 ​ 4.2 ​ Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc.) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.25% ​ 11.58% ​ 12/21/23 ​ 01/02/29 ​ 196 ​ ​ 192 ​ ​ 197 ​ 0.6 ​ Pavement Partners Interco, LLC (d/b/a Pave America, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.22% ​ 03/17/23 ​ 02/07/28 ​ 4,535 ​ ​ 4,435 ​ ​ 4,556 ​ 12.8 ​ Pavement Partners Interco, LLC (d/b/a Pave America, LLC) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.22% ​ 03/17/23 ​ 02/07/28 ​ 572 ​ ​ 559 ​ ​ 575 ​ 1.6 ​ Pavement Partners Interco, LLC (d/b/a Pave America, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.22% ​ 03/17/23 ​ 02/07/28 ​ 307 ​ ​ 300 ​ ​ 311 ​ 0.9 ​ TriplePoint Acquisition Holdings LLC (d/b/a TriplePoint MEP Holdings, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 5.50% ​ 10.83% ​ 06/14/24 ​ 05/31/29 ​ 5,376 ​ ​ 5,270 ​ ​ 5,270 ​ 14.9 ​ TriplePoint Acquisition Holdings LLC (d/b/a TriplePoint MEP Holdings, LLC) (6) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 5.50% ​ 10.83% ​ 06/14/24 ​ 05/31/29 ​ — ​ ​ — ​ ​ — ​ — ​ TriplePoint Acquisition Holdings LLC (d/b/a TriplePoint MEP Holdings, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 5.50% ​ 10.83% ​ 06/14/24 ​ 05/31/29 ​ — ​ ​ — ​ ​ — ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 15,276 ​ ​ 15,452 ​ 43.6 ​ Data Processing & Outsourced Services ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Geo Logic Systems Ltd. (7)(10) ​ First Lien Secured Term Loan ​ 1.00% ​ CORRA ​ 6.50% ​ 11.47% ​ 01/22/20 ​ 12/19/24 ​ 18,686 ​ ​ 14,431 ​ ​ 13,653 ​ 38.5 ​ Geo Logic Systems Ltd. (7)(10) ​ First Lien Secured Revolving Loan ​ 1.00% ​ CORRA ​ 6.50% ​ 11.47% ​ 01/22/20 ​ 12/19/24 ​ — ​ ​ — ​ ​ 3 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 14,431 ​ ​ 13,656 ​ 38.5 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ Distributors ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ APG Lions Purchaser, LLC (d/b/a CF Stinson, Inc.) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.08% ​ 04/26/24 ​ 04/16/30 ​ 4,114 ​ $ 4,054 ​ $ 4,055 ​ 11.4 % APG Lions Purchaser, LLC (d/b/a CF Stinson, Inc.) (6) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.08% ​ 04/26/24 ​ 04/16/30 ​ — ​ ​ — ​ ​ — ​ — ​ APG Lions Purchaser, LLC (d/b/a CF Stinson, Inc.) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.08% ​ 04/26/24 ​ 04/16/30 ​ 69 ​ ​ 68 ​ ​ 68 ​ 0.2 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 4,122 ​ ​ 4,123 ​ 11.6 ​ Diversified Support Services ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pirtek Holdco, LLC (d/b/a Pirtek USA, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.04% ​ 10/31/23 ​ 10/26/28 ​ 7,463 ​ ​ 7,317 ​ ​ 7,367 ​ 20.8 ​ Pirtek Holdco, LLC (d/b/a Pirtek USA, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.04% ​ 10/31/23 ​ 10/26/28 ​ — ​ ​ — ​ ​ 7 ​ — ​ Quest Events, LLC ​ First Lien Secured Term Loan ​ 2.00% ​ SOFR ​ 7.00% ​ 12.60% ​ 07/19/19 ​ 09/30/26 ​ 11,651 ​ ​ 11,613 ​ ​ 11,651 ​ 32.9 ​ Quest Events, LLC ​ First Lien Secured Revolving Loan ​ 2.00% ​ SOFR ​ 7.00% ​ 12.60% ​ 07/19/19 ​ 09/30/26 ​ 247 ​ ​ 246 ​ ​ 248 ​ 0.7 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 19,176 ​ ​ 19,273 ​ 54.4 ​ Drug Retail ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Maxor Acquisition, Inc. (d/b/a Maxor National Pharmacy Services, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.29% ​ 04/11/23 ​ 03/01/29 ​ 5,027 ​ ​ 4,910 ​ ​ 5,078 ​ 14.3 ​ Maxor Acquisition, Inc. (d/b/a Maxor National Pharmacy Services, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.29% ​ 04/11/23 ​ 03/01/29 ​ — ​ ​ — ​ ​ 11 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 4,910 ​ ​ 5,089 ​ 14.3 ​ Electronic Equipment & Instruments ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ LMG Holdings, Inc. ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.00% ​ 11.48% ​ 06/28/21 ​ 04/30/26 ​ 13,261 ​ ​ 13,162 ​ ​ 13,261 ​ 37.4 ​ LMG Holdings, Inc. ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.00% ​ 11.48% ​ 06/28/21 ​ 04/30/26 ​ — ​ ​ — ​ ​ 6 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 13,162 ​ ​ 13,267 ​ 37.4 ​ Environmental & Facilities Services ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Buckeye Acquiror LLC (d/b/a Superior Environmental Solutions, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.94% ​ 08/09/23 ​ 08/01/29 ​ 6,167 ​ ​ 6,035 ​ ​ 6,192 ​ 17.5 ​ Buckeye Acquiror LLC (d/b/a Superior Environmental Solutions, LLC) (6) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.94% ​ 08/09/23 ​ 08/01/29 ​ 898 ​ ​ 877 ​ ​ 902 ​ 2.5 ​ Buckeye Acquiror LLC (d/b/a Superior Environmental Solutions, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.94% ​ 08/09/23 ​ 08/01/29 ​ 271 ​ ​ 265 ​ ​ 283 ​ 0.8 ​ Juniper Landscaping Holdings LLC ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.25% ​ 11.85% ​ 03/01/22 ​ 12/29/26 ​ 11,135 ​ ​ 11,037 ​ ​ 11,135 ​ 31.4 ​ Juniper Landscaping Holdings LLC ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 6.25% ​ 11.85% ​ 03/01/22 ​ 12/29/26 ​ 2,355 ​ ​ 2,334 ​ ​ 2,355 ​ 6.6 ​ Juniper Landscaping Holdings LLC ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.25% ​ 11.85% ​ 03/01/22 ​ 12/29/26 ​ — ​ ​ — ​ ​ 10 ​ — ​ RLJ Pro-Vac, Inc. (d/b/a Pro-Vac) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.25% ​ 11.69% ​ 01/23/24 ​ 12/31/26 ​ 6,692 ​ ​ 6,576 ​ ​ 6,610 ​ 18.6 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (13)(14) ​ First Lien Secured Term Loan ​ 0.50% ​ SOFR ​ 6.75% ​ 12.14% ​ 03/23/23 ​ 09/28/29 ​ 2,807 ​ ​ 2,750 ​ ​ 2,807 ​ 7.9 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (10)(13)(14) ​ First Lien Secured Term Loan ​ 0.50% ​ CORRA ​ 6.75% ​ 11.85% ​ 03/23/23 ​ 09/28/29 ​ 3,873 ​ ​ 2,765 ​ ​ 2,830 ​ 8.0 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (8)(13)(14) ​ First Lien Secured Term Loan ​ 0.00% ​ SONIA ​ 6.75% ​ 12.02% ​ 03/23/23 ​ 09/28/29 ​ 171 ​ ​ 205 ​ ​ 216 ​ 0.6 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (13)(14) ​ First Lien Secured Delayed Draw Loan ​ 0.50% ​ SOFR ​ 6.75% ​ 12.12% ​ 03/23/23 ​ 09/28/29 ​ 582 ​ ​ 570 ​ ​ 582 ​ 1.6 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (8)(13)(14) ​ First Lien Secured Delayed Draw Loan ​ 0.00% ​ SONIA ​ 6.75% ​ 12.02% ​ 03/23/23 ​ 09/28/29 ​ 1,850 ​ ​ 2,288 ​ ​ 2,338 ​ 6.6 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (10)(13)(14) ​ First Lien Secured Delayed Draw Loan ​ 0.50% ​ CORRA ​ 6.75% ​ 11.85% ​ 03/23/23 ​ 09/28/29 ​ 458 ​ ​ 324 ​ ​ 335 ​ 0.9 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (12)(13)(14) ​ First Lien Secured Delayed Draw Loan ​ 0.50% ​ SOFR ​ 6.75% ​ 12.12% ​ 03/23/23 ​ 09/28/29 ​ — ​ ​ — ​ ​ 21 ​ 0.1 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 36,026 ​ ​ 36,616 ​ 103.1 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ Food Distributors ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Clark Restaurant Service, LLC (d/b/a CRS OneSource) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.08% ​ 06/14/24 ​ 05/10/29 ​ 5,031 ​ $ 4,933 ​ $ 4,934 ​ 13.9 % Clark Restaurant Service, LLC (d/b/a CRS OneSource) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.08% ​ 06/14/24 ​ 05/10/29 ​ — ​ ​ — ​ ​ — ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 4,933 ​ ​ 4,934 ​ 13.9 ​ Health Care Supplies ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Arteriocyte Medical Systems, Inc. (d/b/a ISTO Biologics) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.00% ​ 11.33% ​ 10/25/23 ​ 10/18/28 ​ 5,009 ​ ​ 4,901 ​ ​ 4,980 ​ 14.0 ​ Arteriocyte Medical Systems, Inc. (d/b/a ISTO Biologics) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.00% ​ 11.33% ​ 10/25/23 ​ 10/18/28 ​ — ​ ​ — ​ ​ 8 ​ — ​ Medical Device Inc. (d/b/a Arterex) ​ First Lien Secured Term Loan ​ 1.25% ​ SOFR ​ 6.50% ​ 11.93% ​ 07/27/23 ​ 07/11/29 ​ 2,647 ​ ​ 2,591 ​ ​ 2,633 ​ 7.4 ​ Medical Device Inc. (d/b/a Arterex) ​ First Lien Secured Revolving Loan ​ 1.25% ​ SOFR ​ 6.50% ​ 11.93% ​ 07/27/23 ​ 07/11/29 ​ — ​ ​ — ​ ​ 5 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 7,492 ​ ​ 7,626 ​ 21.4 ​ Household Appliances ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Smalto Inc. (d/b/a PEMCO International) (9) ​ First Lien Secured Term Loan ​ 1.00% ​ EurIBOR ​ 6.25% ​ 9.97% ​ 05/04/22 ​ 04/28/28 ​ 6,423 ​ ​ 6,673 ​ ​ 6,879 ​ 19.4 ​ Smalto Inc. (d/b/a PEMCO International) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.00% ​ 11.48% ​ 05/04/22 ​ 04/28/28 ​ 978 ​ ​ 966 ​ ​ 978 ​ 2.8 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 7,639 ​ ​ 7,857 ​ 22.2 ​ IT Consulting & Other Services ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ATSG, Inc. ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.98% ​ 03/27/23 ​ 11/12/26 ​ 9,810 ​ ​ 9,650 ​ ​ 9,633 ​ 27.2 ​ Cennox Holdings Limited (d/b/a Cennox) (8)(14) ​ First Lien Secured Term Loan ​ 1.00% ​ SONIA ​ 6.25% ​ 11.61% ​ 07/16/21 ​ 05/04/26 ​ 2,814 ​ ​ 3,855 ​ ​ 3,533 ​ 10.0 ​ Cennox, Inc. (d/b/a Cennox) (9) ​ First Lien Secured Term Loan ​ 1.00% ​ EurIBOR ​ 6.25% ​ 9.96% ​ 06/28/22 ​ 05/04/26 ​ 9,385 ​ ​ 9,837 ​ ​ 10,052 ​ 28.3 ​ Cennox Holdings Limited (d/b/a Cennox) (8)(11)(14) ​ First Lien Secured Revolving Loan ​ 1.00% ​ Base Rate ​ 5.17% ​ 13.13% ​ 07/16/21 ​ 05/04/26 ​ 351 ​ ​ 538 ​ ​ 442 ​ 1.2 ​ MGT Merger Target, LLC (d/b/a MGT Consulting Group) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.39% ​ 11.82% ​ 05/10/23 ​ 04/10/29 ​ 7,242 ​ ​ 7,076 ​ ​ 7,288 ​ 20.6 ​ MGT Merger Target, LLC (d/b/a MGT Consulting Group) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 6.11% ​ 11.54% ​ 05/10/23 ​ 04/10/29 ​ 826 ​ ​ 807 ​ ​ 822 ​ 2.3 ​ MGT Merger Target, LLC (d/b/a MGT Consulting Group) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.39% ​ 11.82% ​ 05/10/23 ​ 04/10/28 ​ — ​ ​ — ​ ​ 15 ​ — ​ RCKC Acquisitions LLC (d/b/a KSM Consulting, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 5.25% ​ 10.73% ​ 01/27/21 ​ 01/02/29 ​ 10,980 ​ ​ 10,885 ​ ​ 10,998 ​ 31.0 ​ RCKC Acquisitions LLC (d/b/a KSM Consulting, LLC) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 5.25% ​ 10.73% ​ 01/27/21 ​ 01/02/29 ​ 2,961 ​ ​ 2,934 ​ ​ 2,966 ​ 8.4 ​ RCKC Acquisitions LLC (d/b/a KSM Consulting, LLC) (6) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 5.25% ​ 10.73% ​ 01/27/21 ​ 01/02/29 ​ — ​ ​ — ​ ​ 12 ​ — ​ Turnberry Solutions, Inc. ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.23% ​ 08/10/21 ​ 09/02/26 ​ 5,995 ​ ​ 5,943 ​ ​ 5,995 ​ 16.9 ​ Turnberry Solutions, Inc. ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.23% ​ 08/10/21 ​ 09/02/26 ​ — ​ ​ — ​ ​ 6 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 51,525 ​ ​ 51,762 ​ 145.9 ​ Packaged Foods & Meats ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ PANOS Brands, LLC ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.07% ​ 06/14/24 ​ 05/14/29 ​ 4,543 ​ ​ 4,454 ​ ​ 4,454 ​ 12.6 ​ PANOS Brands, LLC ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.07% ​ 06/14/24 ​ 05/14/29 ​ — ​ ​ — ​ ​ — ​ — ​ Poultry Holdings LLC (HPP) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.00% ​ 11.44% ​ 10/21/19 ​ 06/28/25 ​ 6,748 ​ ​ 6,726 ​ ​ 6,748 ​ 19.0 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 11,180 ​ ​ 11,202 ​ 31.6 ​ Paper & Plastic Packaging Products & Materials ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Max Solutions, Inc. (13) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 8.28% ​ 13.72% ​ 10/07/22 ​ 09/29/28 ​ 6,556 ​ ​ 6,463 ​ ​ 6,231 ​ 17.6 ​ Max Solutions, Inc. (6)(13) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 8.26% ​ 13.71% ​ 10/07/22 ​ 09/29/28 ​ 416 ​ ​ 413 ​ ​ 396 ​ 1.1 ​ Max Solutions, Inc. (10) ​ First Lien Secured Revolving Loan ​ 1.00% ​ CORRA ​ 8.26% ​ 13.71% ​ 10/07/22 ​ 09/29/28 ​ — ​ ​ — ​ ​ (6) ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 6,876 ​ ​ 6,621 ​ 18.7 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 Care Products ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Sunless, Inc. ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.18% ​ 10/21/19 ​ 08/13/25 ​ 4,956 ​ $ 4,926 ​ $ 4,956 ​ 14.0 % Sunless, Inc. (6) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.19% ​ 10/21/19 ​ 08/13/25 ​ 887 ​ ​ 884 ​ ​ 887 ​ 2.5 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 5,810 ​ ​ 5,843 ​ 16.5 ​ Pharmaceuticals ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Meta Buyer LLC (d/b/a Metagenics, Inc.) (9) ​ First Lien Secured Term Loan ​ 1.00% ​ EurIBOR ​ 6.00% ​ 9.61% ​ 12/16/21 ​ 11/01/27 ​ 12,101 ​ ​ 13,501 ​ ​ 12,960 ​ 36.5 ​ Meta Buyer LLC (d/b/a Metagenics, Inc.) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.00% ​ 11.43% ​ 12/16/21 ​ 11/01/27 ​ 967 ​ ​ 956 ​ ​ 967 ​ 2.7 ​ Meta Buyer LLC (d/b/a Metagenics, Inc.) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 6.00% ​ 11.39% ​ 12/16/21 ​ 11/01/27 ​ 878 ​ ​ 868 ​ ​ 878 ​ 2.5 ​ Meta Buyer LLC (d/b/a Metagenics, Inc.) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.00% ​ 11.37% ​ 12/16/21 ​ 11/01/27 ​ 1,156 ​ ​ 1,143 ​ ​ 1,160 ​ 3.3 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 16,468 ​ ​ 15,965 ​ 45.0 ​ Real Estate Operating Companies ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ HRG Management, LLC (d/b/a HomeRiver Group, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 7.00% ​ 12.48% (11.98% Cash + 0.50% PIK) ​ 12/28/21 ​ 10/19/26 ​ 5,574 ​ ​ 5,523 ​ ​ 5,407 ​ 15.3 ​ HRG Management, LLC (d/b/a HomeRiver Group, LLC) (11) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ Base Rate ​ 6.97% ​ 12.79% (12.29% Cash + 0.50% PIK) ​ 02/18/22 ​ 10/19/26 ​ 1,398 ​ ​ 1,385 ​ ​ 1,359 ​ 3.8 ​ HRG Management, LLC (d/b/a HomeRiver Group, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 7.00% ​ 12.48% (11.98% Cash + 0.50% PIK) ​ 02/18/22 ​ 10/19/26 ​ — ​ ​ — ​ ​ (23) ​ (0.1) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 6,908 ​ ​ 6,743 ​ 19.0 ​ Real Estate Services ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ NPAV Lessor Corp. (d/b/a Nationwide Property & Appraisal Services, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.94% ​ 03/01/22 ​ 01/21/27 ​ 6,502 ​ ​ 6,435 ​ ​ 5,785 ​ 16.4 ​ NPAV Lessor Corp. (d/b/a Nationwide Property & Appraisal Services, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.94% ​ 03/01/22 ​ 01/21/27 ​ 725 ​ ​ 718 ​ ​ 645 ​ 1.8 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 7,153 ​ ​ 6,430 ​ 18.2 ​ Research & Consulting Services ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.) ​ First Lien Secured Term Loan ​ 0.75% ​ SOFR ​ 6.00% ​ 11.34% ​ 01/10/24 ​ 11/21/29 ​ 3,635 ​ ​ 3,554 ​ ​ 3,584 ​ 10.1 ​ Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.) (6) ​ First Lien Secured Delayed Draw Loan ​ 0.75% ​ SOFR ​ 6.00% ​ 11.34% ​ 01/10/24 ​ 11/21/29 ​ — ​ ​ — ​ ​ (3) ​ — ​ Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.) ​ First Lien Secured Revolving Loan ​ 0.75% ​ Prime ​ 5.00% ​ 13.50% ​ 01/10/24 ​ 11/21/28 ​ 75 ​ ​ 73 ​ ​ 76 ​ 0.2 ​ E-Phoenix Acquisition Co. Inc. (d/b/a Integreon, Inc.) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 5.50% ​ 10.98% ​ 07/15/21 ​ 06/23/27 ​ 8,387 ​ ​ 8,335 ​ ​ 8,387 ​ 23.7 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 11,962 ​ ​ 12,044 ​ 34.0 ​ Technology Hardware, Storage & Peripherals ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Source Code Holdings, LLC (d/b/a Source Code Corporation) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.94% ​ 08/10/21 ​ 07/30/27 ​ 14,239 ​ ​ 14,092 ​ ​ 14,183 ​ 40.1 ​ Source Code Holdings, LLC (d/b/a Source Code Corporation) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.94% ​ 08/10/21 ​ 07/30/27 ​ 3,893 ​ ​ 3,853 ​ ​ 3,878 ​ 10.9 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 17,945 ​ ​ 18,061 ​ 51.0 ​ Trading Companies & Distributors ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ LINC Systems, LLC ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.98% ​ 06/22/21 ​ 02/24/26 ​ 8,282 ​ ​ 8,223 ​ ​ 8,279 ​ 23.4 ​ LINC Systems, LLC ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.98% ​ 06/22/21 ​ 02/24/26 ​ — ​ ​ — ​ ​ 5 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 8,223 ​ ​ 8,284 ​ 23.4 ​ Wireless Telecommunication Services ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ KORE Wireless Group Inc. (d/b/a KORE Group Holdings, Inc.) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.82% ​ 11/27/23 ​ 11/09/28 ​ 6,386 ​ ​ 6,270 ​ ​ 6,355 ​ 18.0 ​ KORE Wireless Group Inc. (d/b/a KORE Group Holdings, Inc.) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.82% ​ 11/27/23 ​ 11/09/28 ​ — ​ ​ — ​ ​ 11 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 6,270 ​ ​ 6,366 ​ 18.0 ​ Total Investments ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 324,993 ​ $ 324,844 ​ 916.0 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Money market funds (included in cash and cash equivalents and restricted cash and cash equivalents) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Goldman Sachs Money Market Fund (CUSIP: 38141W315) (15) ​ ​ ​ ​ ​ ​ ​ ​ ​ 5.20% ​ ​ ​ ​ ​ ​ ​ $ 2,078 ​ $ 2,078 ​ 5.9 % Invesco Treasury Money Market Fund (CUSIP: X9USDINVE) (15) ​ ​ ​ ​ ​ ​ ​ ​ ​ 5.10% ​ ​ ​ ​ ​ ​ ​ ​ 1,120 ​ ​ 1,120 ​ 3.2 ​ Total Money Market Funds ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 3,198 ​ ​ 3,198 ​ 9.1 ​ Total Investments and Money Market Funds ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 328,191 ​ $ 328,042 ​ 925.1 % ​ Forward Currency Contracts ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Counterparty Currency to be sold ​ Currency to be purchased ​ Settlement date Unrealized appreciation Unrealized depreciation Morgan Stanley ​ C$ 216 CAD ​ $ 157 USD ​ 8/7/24 ​ $ — ​ $ (1) Morgan Stanley ​ € 1,308 EUR ​ $ 1,402 USD ​ 8/7/24 ​ ​ — ​ ​ (2) Morgan Stanley ​ £ 1,564 GBP ​ $ 3,857 USD ​ 8/7/24 ​ ​ — ​ ​ (26) Total ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ — ​ $ (29) (1) Except as noted, all investments provide collateral for the STRS JV Credit Facility and are domiciled in the United States. (2) The investments bear interest at a rate that may be determined by reference to SOFR, CORRA, SONIA, Prime, or EurIBOR, which resets monthly, quarterly or semiannually. (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 STRS JV’s portfolio company investments, which as of the date of the portfolio represented 916.0% of STRS JV’s members’ equity or 94.2% 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) The issuer is domiciled in Canada. (8) Principal amount is denominated in British Pound. (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 Prime and a different base rate, SOFR, SONIA or CORRA. The Floor, Spread Above Index and Interest Rate presented represent the weighted average of both contracts. (12) 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 U.S. dollars, Canadian dollars or British pounds. (13) Investment is structured as a unitranche loan in which the STRS JV may receive additional interest on its “last out” tranche of the portfolio company’s senior term debt, which was previously syndicated into “first out” and “last out” tranches, whereby the “first out” tranche will have priority as to the “last out” tranche with respect to payments of principal, interest and any other amounts due thereunder. (14) The issuer is domiciled in the United Kingdom. (15) The rate shown is the annualized seven-day yield as of June 30, 2024. Below is a listing of STRS JV’s individual investments as of December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ Debt Investments ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Advertising ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Forward Solutions, LLC (d/b/a Avision Sales Group) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.25% ​ 02/18/22 ​ 12/15/26 ​ 9,100 ​ $ 8,991 ​ $ 9,014 ​ 26.0 % Forward Solutions, LLC (d/b/a Avision Sales Group) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.25% ​ 03/11/22 ​ 12/15/26 ​ 3,054 ​ ​ 3,018 ​ ​ 3,025 ​ 8.7 ​ Forward Solutions, LLC (d/b/a Avision Sales Group) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.25% ​ 02/18/22 ​ 12/15/26 ​ — ​ ​ — ​ ​ 1 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 12,009 ​ ​ 12,040 ​ 34.7 ​ Air Freight & Logistics ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ITS Buyer Inc. (d/b/a ITS Logistics, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 5.50% ​ 11.11% ​ 02/17/22 ​ 06/15/26 ​ 3,541 ​ ​ 3,503 ​ ​ 3,504 ​ 10.1 ​ ITS Buyer Inc. (d/b/a ITS Logistics, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 5.50% ​ 11.11% ​ 02/17/22 ​ 06/15/26 ​ — ​ ​ — ​ ​ — ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 3,503 ​ ​ 3,504 ​ 10.1 ​ Broadline Retail ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Marlin DTC-LS Midco 2, LLC (d/b/a Clarus Commerce, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.99% ​ 07/19/19 ​ 07/01/25 ​ 18,908 ​ ​ 18,798 ​ ​ 18,762 ​ 54.1 ​ Marlin DTC-LS Midco 2, LLC (d/b/a Clarus Commerce, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.99% ​ 07/19/19 ​ 07/01/25 ​ — ​ ​ — ​ ​ (3) ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 18,798 ​ ​ 18,759 ​ 54.1 ​ Building Products ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Drew Foam Companies Inc ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 7.25% ​ 12.75% ​ 11/09/20 ​ 11/05/25 ​ 13,644 ​ ​ 13,541 ​ ​ 13,313 ​ 38.4 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 13,541 ​ ​ 13,313 ​ 38.4 ​ Construction & Engineering ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc.) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.00% ​ 11.38% ​ 12/21/23 ​ 01/02/29 ​ 3,091 ​ ​ 3,015 ​ ​ 3,015 ​ 8.7 ​ Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc.) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 6.00% ​ 11.38% ​ 12/21/23 ​ 01/02/29 ​ 1,400 ​ ​ 1,366 ​ ​ 1,365 ​ 3.8 ​ Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc.) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.00% ​ 11.37% ​ 12/21/23 ​ 01/02/29 ​ 196 ​ ​ 191 ​ ​ 191 ​ 0.6 ​ Pavement Partners Interco, LLC (d/b/a Pave America, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.27% ​ 03/17/23 ​ 02/07/28 ​ 4,455 ​ ​ 4,344 ​ ​ 4,405 ​ 12.7 ​ Pavement Partners Interco, LLC (d/b/a Pave America, LLC) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.42% ​ 03/17/23 ​ 02/07/28 ​ 575 ​ ​ 560 ​ ​ 569 ​ 1.6 ​ Pavement Partners Interco, LLC (d/b/a Pave America, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.42% ​ 03/17/23 ​ 02/07/28 ​ — ​ ​ — ​ ​ 5 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 9,476 ​ ​ 9,550 ​ 27.4 ​ Data Processing & Outsourced Services ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Geo Logic Systems Ltd. (7)(10) ​ First Lien Secured Term Loan ​ 1.00% ​ CDOR ​ 6.50% ​ 11.94% ​ 01/22/20 ​ 12/19/24 ​ 19,416 ​ ​ 14,969 ​ ​ 14,654 ​ 42.3 ​ Geo Logic Systems Ltd. (7)(10) ​ First Lien Secured Revolving Loan ​ 1.00% ​ CDOR ​ 6.50% ​ 11.94% ​ 01/22/20 ​ 12/19/24 ​ — ​ ​ — ​ ​ 5 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 14,969 ​ ​ 14,659 ​ 42.3 ​ Diversified Support Services ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pirtek Holdco, LLC (d/b/a Pirtek USA, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.20% ​ 10/31/23 ​ 10/26/28 ​ 7,500 ​ ​ 7,337 ​ ​ 7,337 ​ 21.2 ​ Pirtek Holdco, LLC (d/b/a Pirtek USA, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 5.75% ​ 11.20% ​ 10/31/23 ​ 10/26/28 ​ — ​ ​ — ​ ​ — ​ — ​ Quest Events, LLC ​ First Lien Secured Term Loan ​ 2.00% ​ SOFR ​ 7.25% ​ 12.86% ​ 07/19/19 ​ 09/30/26 ​ 11,709 ​ ​ 11,663 ​ ​ 11,557 ​ 33.3 ​ Quest Events, LLC ​ First Lien Secured Revolving Loan ​ 2.00% ​ SOFR ​ 7.25% ​ 12.86% ​ 07/19/19 ​ 09/30/26 ​ 247 ​ ​ 246 ​ ​ 242 ​ 0.7 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 19,246 ​ ​ 19,136 ​ 55.2 ​ Drug Retail ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Maxor Acquisition, Inc. (d/b/a Maxor National Pharmacy Services, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.48% ​ 04/11/23 ​ 03/01/29 ​ 5,053 ​ ​ 4,922 ​ ​ 5,013 ​ 14.5 ​ Maxor Acquisition, Inc. (d/b/a Maxor National Pharmacy Services, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.75% ​ 12.48% ​ 04/11/23 ​ 03/01/29 ​ — ​ ​ — ​ ​ 9 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 4,922 ​ ​ 5,022 ​ 14.5 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ Electronic Equipment & Instruments ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ LMG Holdings, Inc. ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 12.00% ​ 06/28/21 ​ 04/30/26 ​ 13,330 ​ $ 13,203 ​ $ 13,265 ​ 38.3 % LMG Holdings, Inc. ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 12.00% ​ 06/28/21 ​ 04/30/26 ​ — ​ ​ — ​ ​ 4 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 13,203 ​ ​ 13,269 ​ 38.3 ​ Environmental & Facilities Services ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Juniper Landscaping Holdings LLC ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.25% ​ 11.86% ​ 03/01/22 ​ 12/29/26 ​ 11,192 ​ ​ 11,073 ​ ​ 11,080 ​ 32.0 ​ Juniper Landscaping Holdings LLC ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 6.25% ​ 11.94% ​ 03/01/22 ​ 12/29/26 ​ 2,366 ​ ​ 2,341 ​ ​ 2,342 ​ 6.8 ​ Juniper Landscaping Holdings LLC ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.25% ​ 12.11% ​ 03/01/22 ​ 12/29/26 ​ 199 ​ ​ 197 ​ ​ 193 ​ 0.6 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (13)(14) ​ First Lien Secured Term Loan ​ 0.50% ​ SOFR ​ 6.50% ​ 11.85% ​ 03/23/23 ​ 09/28/29 ​ 2,807 ​ ​ 2,744 ​ ​ 2,786 ​ 8.0 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (10)(13)(14) ​ First Lien Secured Term Loan ​ 0.50% ​ CDOR ​ 6.50% ​ 11.94% ​ 03/23/23 ​ 09/28/29 ​ 3,873 ​ ​ 2,759 ​ ​ 2,892 ​ 8.3 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (8)(13)(14) ​ First Lien Secured Term Loan ​ 0.00% ​ SONIA ​ 6.50% ​ 11.72% ​ 03/23/23 ​ 09/28/29 ​ 171 ​ ​ 205 ​ ​ 217 ​ 0.6 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (13)(14) ​ First Lien Secured Delayed Draw Loan ​ 0.50% ​ SOFR ​ 6.50% ​ 11.85% ​ 03/23/23 ​ 09/28/29 ​ 368 ​ ​ 360 ​ ​ 366 ​ 1.1 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (8)(13)(14) ​ First Lien Secured Delayed Draw Loan ​ 0.00% ​ SONIA ​ 6.50% ​ 11.71% ​ 03/23/23 ​ 09/28/29 ​ 723 ​ ​ 882 ​ ​ 984 ​ 2.8 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (10)(13)(14) ​ First Lien Secured Delayed Draw Loan ​ 0.50% ​ CDOR ​ 6.50% ​ 12.08% ​ 03/23/23 ​ 09/28/29 ​ 458 ​ ​ 324 ​ ​ 342 ​ 1.0 ​ Solar Holdings Bidco Limited (d/b/a SLR Consulting Ltd.) (12)(13)(14) ​ First Lien Secured Delayed Draw Loan ​ 0.50% ​ SOFR ​ 6.50% ​ 11.85% ​ 03/23/23 ​ 09/28/29 ​ — ​ ​ — ​ ​ — ​ — ​ Buckeye Acquiror LLC (d/b/a Superior Environmental Solutions, LLC) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.96% ​ 08/09/23 ​ 08/01/29 ​ 5,985 ​ ​ 5,845 ​ ​ 5,898 ​ 17.0 ​ Buckeye Acquiror LLC (d/b/a Superior Environmental Solutions, LLC) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.96% ​ 08/09/23 ​ 08/01/29 ​ 180 ​ ​ 176 ​ ​ 181 ​ 0.5 ​ Buckeye Acquiror LLC (d/b/a Superior Environmental Solutions, LLC) (6) ​ First Lien Secured Delayed Draw Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.96% ​ 08/09/23 ​ 08/01/29 ​ — ​ ​ — ​ ​ (3) ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 26,906 ​ ​ 27,278 ​ 78.7 ​ Health Care Supplies ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Arteriocyte Medical Systems, Inc. (d/b/a ISTO Biologics) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.25% ​ 11.60% ​ 10/25/23 ​ 10/18/28 ​ 5,022 ​ ​ 4,901 ​ ​ 4,901 ​ 14.1 ​ Arteriocyte Medical Systems, Inc. (d/b/a ISTO Biologics) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.25% ​ 11.60% ​ 10/25/23 ​ 10/18/28 ​ — ​ ​ — ​ ​ — ​ — ​ Medical Device Inc. (d/b/a Arterex) ​ First Lien Secured Term Loan ​ 1.00% ​ SOFR ​ 6.50% ​ 11.95% ​ 07/27/23 ​ 07/11/29 ​ 2,660 ​ ​ 2,599 ​ ​ 2,626 ​ 7.6 ​ Medical Device Inc. (d/b/a Arterex) ​ First Lien Secured Revolving Loan ​ 1.00% ​ SOFR ​ 6.50
Schedule of selected Balance Sheet Information	​ ​ ​ ​ ​ ​ ​ ​ Selected Balance Sheet Information ($ in thousands) ​ As of June 30, 2024 ​ As of December 31, 2023 Assets ​ ​ Investments, at fair value (amortized cost of $324,993 and $312,807, respectively) ​ $ 324,844 ​ $ 312,217 Cash and cash equivalents ​ 16,711 ​ 14,625 Interest receivable ​ ​ 3,204 ​ ​ 2,540 Amounts receivable on unsettled investment transactions ​ ​ 194 ​ ​ 2,687 Other assets ​ 54 ​ 91 Total assets ​ $ 345,007 ​ $ 332,160 Liabilities ​ ​ Credit facility (net of unamortized debt issuance costs of $2,345 and $1,850, respectively) ​ $ 175,441 ​ $ 163,394 Note payable to members ​ 128,459 ​ 128,459 Interest payable on credit facility ​ 1,014 ​ 1,013 Interest payable on notes to members ​ 3,797 ​ 3,799 Unrealized depreciation on foreign currency forward contracts ​ ​ 28 ​ ​ 172 Other liabilities ​ 806 ​ 657 Total liabilities ​ 309,545 ​ 297,494 Members’ equity ​ 35,462 ​ 34,666 Total liabilities and members’ equity ​ $ 345,007 ​ $ 332,160
Schedule of selected Statement of Operations Information	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Six Months Ended Selected Statement of Operations Information ($ in thousands) June 30, 2024 June 30, 2023 June 30, 2024 June 30, 2023 Interest and fee income ​ $ 10,107 ​ $ 9,757 ​ $ 20,197 ​ $ 18,452 Total investment income ​ $ 10,107 ​ $ 9,757 ​ $ 20,197 ​ $ 18,452 Interest expense on credit facility ​ 3,688 ​ 3,671 ​ 7,444 ​ 6,667 Interest expense on notes to members ​ 3,797 ​ 3,542 ​ 7,597 ​ 6,870 Administrative fee ​ 165 ​ 165 ​ 327 ​ 320 Other expenses ​ 139 ​ 151 ​ 355 ​ 350 Total expenses ​ $ 7,789 ​ $ 7,529 ​ $ 15,723 ​ $ 14,207 Net investment income ​ 2,318 ​ 2,228 ​ 4,474 ​ 4,245 Net realized gains (losses) on investments and foreign currency transactions ​ 61 ​ 28 ​ (51) ​ 87 Net change in unrealized appreciation (depreciation) on investments and foreign currency transactions ​ 834 ​ 136 ​ 2,021 ​ 706 Net increase in members’ equity resulting from operations ​ $ 3,213 ​ $ 2,392 ​ $ 6,444 ​ $ 5,038 ​
STRS JV
Schedule of Investments [Line Items]
Schedule of individual investments	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 six months ended June 30, 2024:

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	6 Months Ended
	Jun. 30, 2024
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 June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 1 Level 2 Level 3 Total First lien secured loans ​ $ — ​ $ — ​ $ 522,943 ​ $ 522,943 Second lien secured loans ​ — ​ — ​ 5,002 ​ 5,002 Unsecured loans ​ ​ — ​ — ​ 1,261 ​ 1,261 Subordinated Note to STRS JV ​ — ​ — ​ 84,416 ​ 84,416 Equity (excluding STRS JV) ​ — ​ — ​ 23,080 ​ 23,080 Equity in STRS JV (1) ​ — ​ — ​ — ​ 23,303 Total investments ​ $ — ​ $ — ​ $ 636,702 ​ $ 660,005 (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 following table presents investments (as shown on the consolidated schedule of investments) that were measured at fair value as of December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 1 Level 2 Level 3 ​ Total First lien secured loans ​ $ — ​ $ — ​ $ 555,878 ​ $ 555,878 Second lien secured loans ​ — ​ — ​ 16,246 ​ 16,246 Unsecured loans ​ ​ — ​ — ​ 167 ​ 167 Subordinated Note to STRS JV ​ — ​ — ​ 84,416 ​ 84,416 Equity (excluding STRS JV) ​ — ​ — ​ 16,679 ​ 16,679 Equity in STRS JV (1) ​ — ​ — ​ — ​ 22,782 Total investments ​ $ — ​ $ — ​ $ 673,386 ​ $ 696,168 (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.
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 three and six months ended June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ First Lien Second Lien ​ Subordinated ​ ​ ​ ​ ​ ​ Secured ​ Secured ​ Unsecured ​ Notes to STRS ​ ​ ​ ​ Total Three months ended June 30, 2024 ​ Loans ​ Loans ​ Loans ​ JV ​ Equity ​ Investments Fair value, beginning of period ​ $ 562,269 $ 4,948 $ 1,239 $ 84,416 $ 22,389 ​ $ 675,261 Funding of investments ​ 57,915 — ​ — — 325 ​ 58,240 Non-cash interest income ​ 1,808 — ​ 26 — — ​ 1,834 Accretion of discount ​ 782 2 ​ 1 — — ​ 785 Proceeds from paydowns and sales ​ (97,021) — ​ — — — ​ (97,021) Conversions ​ — — ​ — — — ​ — Realized gains (losses) ​ (212) — ​ — — — ​ (212) Net unrealized appreciation (depreciation) ​ (2,598) 52 ​ (5) — 366 ​ (2,185) Fair value, end of period ​ $ 522,943 $ 5,002 $ 1,261 $ 84,416 $ 23,080 ​ $ 636,702 Change in unrealized appreciation (depreciation) on investments still held as of June 30, 2024 ​ $ (2,651) ​ $ 51 ​ $ (4) ​ $ — ​ $ 369 ​ $ (2,235) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ First Lien Second Lien ​ Subordinated ​ ​ ​ ​ ​ ​ Secured ​ Secured ​ Unsecured ​ Notes to STRS ​ ​ ​ ​ Total Six months ended June 30, 2024 ​ Loans ​ Loans ​ Loans ​ JV ​ Equity ​ Investments Fair value, beginning of period ​ $ 555,878 $ 16,246 $ 167 $ 84,416 $ 16,679 ​ $ 673,386 Funding of investments ​ 116,000 — ​ — — 442 ​ 116,442 Non-cash interest income ​ 3,824 — ​ 42 — — ​ 3,866 Accretion of discount ​ 1,882 17 ​ 2 — — ​ 1,901 Proceeds from paydowns and sales ​ (149,310) (2,040) ​ — — — ​ (151,350) Conversions ​ (8,852) (11,769) ​ 1,053 — 19,568 ​ — Realized gains (losses) ​ (543) (5,817) ​ — — — ​ (6,360) Net unrealized appreciation (depreciation) ​ 4,064 8,365 ​ (3) — (13,609) ​ (1,183) Fair value, end of period ​ $ 522,943 $ 5,002 $ 1,261 $ 84,416 $ 23,080 ​ $ 636,702 Change in unrealized appreciation (depreciation) on investments still held as of June 30, 2024 ​ $ (5,534) ​ $ 96 ​ $ (3) ​ $ — ​ $ (13,609) ​ $ (19,050) ​ ​ The following table presents the changes in investments measured at fair value using Level 3 inputs for the three and six months ended June 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ First Lien Second Lien ​ Subordinated ​ ​ ​ ​ ​ ​ Secured ​ Secured ​ Unsecured ​ Notes to STRS ​ ​ ​ ​ Total Three months ended June 30, 2023 ​ Loans ​ Loans ​ Notes ​ JV ​ Equity ​ Investments Fair value, beginning of period ​ $ 608,477 ​ $ 19,773 $ 167 ​ $ 80,000 ​ $ 20,493 ​ $ 728,910 Funding of investments ​ 27,136 ​ — ​ — ​ 1,472 ​ 782 ​ 29,390 Non-cash interest income ​ 1,687 ​ — ​ — ​ — ​ — ​ 1,687 Accretion of discount ​ 947 ​ 22 ​ — ​ — ​ — ​ 969 Proceeds from paydowns and sales ​ (40,384) ​ — ​ — ​ — ​ (6,605) ​ (46,989) Conversions ​ (3,892) ​ — ​ — ​ — ​ 3,892 ​ — Realized gains (losses) ​ (5) ​ — ​ — ​ — ​ (339) ​ (344) Net unrealized appreciation (depreciation) ​ (1,066) ​ (2,663) ​ — ​ — ​ (2,471) ​ (6,200) Fair value, end of period ​ $ 592,900 ​ $ 17,132 $ 167 ​ $ 81,472 ​ $ 15,752 ​ $ 707,423 Change in unrealized appreciation (depreciation) on investments still held as of June 30, 2023 ​ $ (1,986) ​ $ (2,663) ​ $ — ​ $ — ​ $ (3,281) ​ $ (7,930) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ First Lien Second Lien ​ Subordinated ​ ​ ​ ​ ​ ​ Secured ​ Secured ​ Unsecured ​ Notes to STRS ​ ​ ​ ​ Total Six months ended June 30, 2023 ​ Loans ​ Loans ​ Notes ​ JV ​ Equity ​ Investments Fair value, beginning of period ​ $ 618,267 ​ $ 20,634 $ 167 ​ $ 80,000 ​ $ 21,000 ​ $ 740,068 Funding of investments ​ 64,474 ​ — ​ — ​ 1,472 ​ 783 ​ 66,729 Non-cash interest income ​ 3,668 ​ — ​ — ​ — ​ — ​ 3,668 Accretion of discount ​ 2,027 ​ 43 ​ — ​ — ​ — ​ 2,070 Proceeds from paydowns and sales ​ (88,196) ​ — ​ — ​ — ​ (6,605) ​ (94,801) Conversions ​ (4,537) ​ — ​ — ​ — ​ 4,537 ​ — Realized gains (losses) ​ (100) ​ — ​ — ​ — ​ (339) ​ (439) Net unrealized (depreciation) appreciation ​ (2,703) ​ (3,545) ​ — ​ — ​ (3,624) ​ (9,872) Fair value, end of period ​ $ 592,900 ​ $ 17,132 $ 167 ​ $ 81,472 ​ $ 15,752 ​ $ 707,423 Change in unrealized appreciation (depreciation) on investments still held as of June 30, 2023 ​ $ (3,638) ​ $ (3,545) ​ $ — ​ $ — ​ $ (4,188) ​ $ (11,371)
Schedule of Quantitative information about Level 3 fair value measurements	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value as of ​ Valuation ​ Unobservable ​ Range Investment Type ​ ​ June 30, 2024 ​ Techniques ​ Inputs ​ (Weighted Average) (1) First lien secured loans ​ $ 465,887 ​ Discounted cash flow analysis ​ Discount Rate ​ 9.4% - 24.1% (14.4%) ​ ​ ​ 24,335 ​ Recent transaction ​ Transaction Price ​ 97.0 - 100.0 (98.1) ​ ​ ​ 17,626 ​ Enterprise value analysis ​ EBITDA Multiple ​ 4.1 - 7.6 (7.1) ​ ​ ​ 1,024 ​ Enterprise value analysis ​ Revenue Multiple ​ 0.9 - 0.9 (0.9) ​ ​ ​ 13,154 ​ Expected repayment ​ Transaction Price ​ 100.0 - 101.6 (100.6) ​ ​ ​ 917 ​ Option pricing Model ​ Volatility ​ 14.0 - 18.6 (16.6) Second lien secured loans ​ ​ 5,002 ​ Discounted cash flow analysis ​ Discount rate ​ 13.1% - 13.1% (13.1%) Unsecured loans ​ ​ 1,261 ​ Discounted cash flow analysis ​ Discount rate ​ 10.3% - 15.4% (14.8%) Subordinated Notes to STRS JV ​ ​ 84,416 ​ Enterprise value analysis ​ n/a ​ n/a Common equity ​ ​ 2,547 ​ Discounted cash flow analysis ​ Discount rate ​ 15.9% - 20.5% (16.8%) ​ ​ ​ 8,050 ​ Enterprise value analysis ​ EBITDA multiple ​ 5.5 - 13.3 (9.2) ​ ​ ​ 9,409 ​ Enterprise value analysis ​ Revenue Multiple ​ 0.9 - 1.8 (1.8) ​ ​ ​ 865 ​ Recent transaction ​ Transaction price ​ 5.0 - 5.0 (1.8) Preferred equity ​ ​ 648 ​ Discounted cash flow analysis ​ Discount rate ​ 22.4% - 22.4% (22.4%) ​ ​ ​ 405 ​ Enterprise value analysis ​ EBITDA multiple ​ 6.0 - 10.5 (8.5) ​ ​ ​ 1,088 ​ Enterprise value analysis ​ Revenue Multiple ​ 0.9 - 0.9 (0.9) Warrant ​ ​ 68 ​ Discounted cash flow analysis ​ Discount rate ​ 20.5% - 20.5% (20.5%) Total Level 3 Investments ​ $ 636,702 ​ ​ ​ ​ ​ ​ (1) Unobservable inputs were weighted by the relative fair value of the investments. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value as of ​ Valuation ​ Unobservable ​ Range Investment Type ​ ​ December 31, 2023 ​ Techniques ​ Inputs ​ (Weighted Average)(1) First lien secured loans ​ $ 510,739 ​ Discounted cash flow analysis ​ Discount rate ​ 11.0% - 30.3% (13.9%) ​ ​ ​ 34,016 ​ Recent transaction ​ Transaction price ​ 89.0 - 98.8 (96.2) ​ ​ ​ 10,477 ​ Enterprise value analysis ​ EBITDA multiple ​ 8.6 - 8.6 (8.6) ​ ​ ​ 646 ​ Option pricing Model ​ Volatility ​ 17.2 - 17.2 (17.2) Second lien secured loans ​ ​ 14,645 ​ Discounted cash flow analysis ​ Discount rate ​ 12.6% - 24.0% (20.2%) ​ ​ ​ 1,601 ​ Enterprise value analysis ​ EBITDA multiple ​ 6.3 - 6.3 (6.3) Unsecured loans ​ ​ 167 ​ Enterprise value analysis ​ EBITDA multiple ​ 7.1 - 7.1 (7.1) Subordinated Notes to STRS JV ​ ​ 84,416 ​ Enterprise value analysis ​ n/a ​ n/a Common equity ​ ​ 3,175 ​ Discounted cash flow analysis ​ Discount rate ​ 14.7% - 30.3% (16.6%) ​ ​ ​ 6,927 ​ Enterprise value analysis ​ EBITDA multiple ​ 5.5 - 13.2 (8.8) ​ ​ ​ 709 ​ Recent transaction ​ Transaction price ​ 1.0 - 1.0 (1.0) Preferred equity ​ ​ 832 ​ Discounted cash flow analysis ​ Discount rate ​ 29.9% - 30.3% (29.9%) ​ ​ ​ 1,511 ​ Enterprise value analysis ​ EBITDA multiple ​ 6.0 - 10.5 (6.7) Warrant ​ ​ 3,525 ​ Discounted cash flow analysis ​ Discount rate ​ 26.2% - 30.2% (26.3%) Total Level 3 Investments ​ $ 673,386 ​ ​ ​ ​ ​ ​ (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 June 30, 2024 ​ As of December 31, 2023 ​ ​ Fair ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Value Level Principal Amount Outstanding Fair Value Principal Amount Outstanding Fair Value JPM Credit Facility 3 ​ $ 168,116 ​ $ 166,949 ​ $ 196,512 ​ $ 194,926 5.375% 2025 Notes 3 ​ 40,000 ​ 38,557 ​ ​ 40,000 ​ ​ 38,369 5.375% 2026 Notes ​ 3 ​ ​ 10,000 ​ ​ 9,356 ​ 10,000 ​ 9,365 4.000% 2026 Notes 3 ​ 75,000 ​ 67,866 ​ 75,000 ​ 67,511 5.625% 2027 Notes 3 ​ 10,000 ​ 9,199 ​ ​ 10,000 ​ 9,261 4.250% 2028 Notes ​ 3 ​ ​ 25,000 ​ 21,257 ​ ​ 25,000 ​ ​ 21,379 7.875% 2028 Notes ​ 3 ​ ​ 34,500 ​ ​ 34,021 ​ ​ 34,500 ​ 34,365 ​ ​ ​ ​ $ 362,616 ​ $ 347,205 ​ $ 391,012 ​ $ 375,176 ​

BORROWINGS (Tables)

BORROWINGS (Tables)	6 Months Ended
	Jun. 30, 2024
BORROWINGS
Schedule of borrowings outstanding and available	Total borrowings outstanding and available as of June 30, 2024, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Maturity Rate Principal Amount Outstanding Amortized Cost Available JPM Credit Facility (1) 11/22/2025 S+2.500 % $ 168,116 ​ $ 166,949 ​ $ 166,884 5.375% 2025 Notes 10/20/2025 5.375 % 40,000 ​ 39,826 ​ — 5.375% 2026 Notes 12/4/2026 5.375 % 10,000 ​ 9,929 ​ — 4.000% 2026 Notes 12/15/2026 4.000 % 75,000 ​ 74,162 ​ — 5.625% 2027 Notes 12/4/2027 5.625 % 10,000 ​ 9,914 ​ — 4.250% 2028 Notes ​ 12/6/2028 ​ 4.250 % ​ 25,000 ​ ​ 24,770 ​ ​ — 7.875% 2028 Notes ​ 9/15/2028 ​ 7.875 % ​ 34,500 ​ ​ 33,346 ​ ​ — Total debt ​ ​ ​ ​ $ 362,616 ​ $ 358,896 ​ $ 166,884 (1) All foreign denominated principal borrowings have been converted to USD using the exchange rates as of the applicable reporting date. ​ Total borrowings outstanding and available as of December 31, 2023, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Maturity Rate Principal Amount Outstanding Amortized Cost Available JPM Credit Facility (1) 11/22/2025 S+2.500 % $ 196,512 ​ $ 194,926 ​ $ 138,488 5.375% 2025 Notes 10/20/2025 5.375 % 40,000 ​ 39,761 ​ — 5.375% 2026 Notes 12/4/2026 5.375 % 10,000 ​ 9,914 ​ — 4.000% 2026 Notes 12/15/2026 4.000 % 75,000 ​ 73,992 ​ — 5.625% 2027 Notes 12/4/2027 5.625 % 10,000 ​ 9,901 ​ — 4.250% 2028 Notes ​ 12/6/2028 ​ 4.250 % ​ 25,000 ​ ​ 24,745 ​ ​ — 7.875% 2028 Notes ​ 9/15/2028 ​ 7.875 % ​ 34,500 ​ ​ 33,209 ​ ​ — Total debt ​ ​ ​ ​ $ 391,012 ​ $ 386,448 ​ $ 138,488 (1) All foreign denominated principal borrowings have been converted to USD using the exchange rates as of the applicable reporting date.

RELATED PARTY TRANSACTIONS (Tab

RELATED PARTY TRANSACTIONS (Tables)	6 Months Ended
	Jun. 30, 2024
RELATED PARTY TRANSACTIONS
Schedule of management fee expenses	The following table details our management fee expenses for the three and six months ended June 30, 2024 and 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended June 30, ​ ​ Six months ended June 30, Management Fee ($ in thousands) ​ 2024 ​ ​ 2023 ​ 2024 ​ ​ 2023 Base management fee ​ $ 3,065 ​ $ 3,705 ​ $ 6,182 ​ $ 7,416 Total management fees ​ $ 3,065 ​ $ 3,705 ​ $ 6,182 ​ $ 7,416
Schedule of performance-based incentive fees	The following table provides a breakdown of the performance-based incentive fees for the three and six months ended June 30, 2024 and 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended June 30, ​ ​ Six months ended June 30, Performance-based Incentive Fee ($ in thousands) ​ 2024 ​ ​ 2023 ​ 2024 ​ ​ 2023 Income incentive fee ​ $ 2,323 ​ $ 2,648 ​ $ 5,026 ​ $ 5,324 Capital gains incentive fee ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total performance-based incentive fees ​ $ 2,323 ​ $ 2,648 ​ $ 5,026 ​ $ 5,324

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	6 Months Ended
	Jun. 30, 2024
COMMITMENTS AND CONTINGENCIES
Schedule of unfunded commitments	​ ​ ​ ​ ​ ​ ​ ​ Unfunded Commitments ($ in thousands) As of June 30, 2024 As of December 31, 2023 Revolving Loan Commitments: ​ ​ ​ ​ ​ ​ Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.) ​ $ — ​ $ 447 Branford Filtration, LLC (d/b/a Clean Solutions Group) ​ ​ 387 ​ ​ 387 Bridgepoint Healthcare, LLC ​ ​ 1,350 ​ ​ 1,588 BUSA Acquisition Co. (d/b/a BankCard USA Merchant Services Inc.) ​ ​ 184 ​ ​ — Claridge Products and Equipment, LLC ​ ​ 70 ​ ​ 351 Coastal Television Broadcasting Group LLC ​ ​ 309 ​ ​ 309 EducationDynamics, LLC ​ ​ 1,199 ​ ​ 1,199 Gulf Winds International Acquisition LLC (d/b/a Gulf Winds International, Inc.) ​ ​ 485 ​ ​ 647 HC Salon Holdings, Inc. (d/b/a Hair Cuttery) ​ ​ 700 ​ ​ 700 Leviathan Intermediate Holdco, LLC ​ ​ 570 ​ ​ 570 Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC) ​ ​ 305 ​ ​ 572 Motivational Marketing, LLC (d/b/a Motivational Fulfillment) ​ ​ — ​ ​ 709 MSI Information Services, Inc. ​ ​ 225 ​ ​ 225 M&M OpCo. LLC (d/b/a Escalent, Inc.) ​ ​ 238 ​ ​ 238 Naviga Inc. (f/k/a Newscycle Solutions, Inc.) ​ ​ — ​ ​ 30 PANOS Brands, LLC ​ ​ 412 ​ ​ — Ribbon Communications Operating Company, Inc. (d/b/a Ribbon Communications Inc.) ​ ​ 880 ​ ​ — PLTFRM Companies, LLC ​ ​ 176 ​ ​ — Salon Republic Holdings, LLC (d/b/a Salon Republic, LLC) ​ ​ 861 ​ ​ 610 Sleep OpCo LLC (d/b/a Brooklyn Bedding LLC) ​ ​ 2,646 ​ ​ 2,646 Telestream Holdings Corporation ​ ​ 222 ​ ​ 87 The Kyjen Company, LLC (d/b/a Outward Hound) ​ ​ 798 ​ ​ 798 TOT Group, Inc. (d/b/a Net Element Inc.) ​ ​ 553 ​ ​ — Zephyr Buyer, L.P. (d/b/a The Weather Company, LLC) ​ ​ 1,806 ​ ​ — Total unfunded revolving loan commitments ​ ​ 14,376 ​ ​ 12,113 ​ ​ ​ ​ ​ ​ ​ Delayed Draw Loan Commitments: ​ ​ ​ ​ ​ ​ Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC) ​ ​ 1,422 ​ ​ — Avision Holdings, LLC (d/b/a Avision Sales Group) ​ ​ 2,311 ​ ​ — Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc.) ​ ​ — ​ ​ 140 Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.) ​ ​ — ​ ​ 895 Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC) ​ ​ 245 ​ ​ 648 Monarch Collective Holdings, LLC ​ ​ 3,124 ​ ​ — Salon Republic Holdings, LLC (d/b/a Salon Republic, LLC) ​ ​ 2,104 ​ ​ 1,407 StoicLane MidCo, LLC (d/b/a StoicLane Inc.) ​ ​ — ​ ​ 6,237 TOT Group, Inc. (d/b/a Net Element Inc.) ​ ​ 1,107 ​ ​ — Total unfunded delayed draw loan commitments ​ ​ 10,313 ​ ​ 9,327 Total Unfunded Commitments ​ $ 24,689 ​ $ 21,440 ​

FINANCIAL HIGHLIGHTS (Tables)

FINANCIAL HIGHLIGHTS (Tables)	6 Months Ended
	Jun. 30, 2024
FINANCIAL HIGHLIGHTS
Schedule of financial highlights	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, ​ ​ 2024 2023 Per share data: (1) ​ ​ ​ Net asset value, beginning of period ​ $ 13.63 $ 14.30 ​ Net investment income ​ 0.86 ​ 0.92 ​ Net realized and unrealized gains (losses) on investments and foreign currency transactions ​ ​ (0.27) ​ ​ (0.43) ​ Net increase in net assets resulting from operations ​ 0.59 ​ 0.49 ​ Distributions declared from net investment income ​ (0.77) ​ (0.79) ​ Net asset value, end of period ​ $ 13.45 $ 14.00 ​ Total annualized return based on market value (2) ​ (0.49) % ​ (3.40) % Total annualized return based on net asset value ​ 8.72 % ​ 6.89 % Net assets, end of period ​ $ 312,682 ​ $ 325,296 ​ Per share market value at end of period ​ $ 12.27 ​ $ 12.83 ​ Shares outstanding end of period ​ 23,243,088 ​ 23,243,088 ​ Ratios/Supplemental Data: (3) ​ ​ ​ Ratio of expenses before incentive fees to average net assets (4) ​ 15.04 % 15.22 % Ratio of incentive fees to average net assets ​ 3.17 % 3.22 % Ratio of total expenses to average net assets (4) ​ 18.21 % 18.44 % Ratio of net investment income to average net assets (4) ​ 12.69 % 12.89 % Portfolio turnover ratio ​ 17.01 % 8.75 % (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)	6 Months Ended
	Jun. 30, 2024
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	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended June 30, ​ Six Months Ended June 30, ($ in thousands except share and per share amounts) 2024 2023 2024 2023 Net increase in net assets resulting from operations ​ $ 7,839 ​ $ 3,881 ​ $ 13,808 ​ $ 11,387 Weighted average shares outstanding ​ 23,243,088 ​ 23,243,088 ​ 23,243,088 ​ 23,243,088 Basic and diluted per share net increase in net assets resulting from operations ​ $ 0.34 ​ $ 0.17 ​ $ 0.59 ​ $ 0.49 ​

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional information (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Percentage of investment owned	100%
Unrecognized tax benefits	$ 0	$ 0
Accrued for interest or penalties	0	0
Cost of investments for federal income tax	721,765	751,117
Net unrealized depreciation	61,760	54,949
Gross unrealized appreciation	28,476	6,881
Gross unrealized depreciation	$ 90,236	$ 61,830

FORWARD CURRENCY CONTRACTS - Fo

FORWARD CURRENCY CONTRACTS - Forward Currency Contracts (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
FORWARD CURRENCY CONTRACTS
Realized gain (loss) on forward currency contracts	$ (8)	$ 41	$ 1	$ 402
Foreign currency forward contracts
FORWARD CURRENCY CONTRACTS
Realized gain (loss) on forward currency contracts	28	4		(3)
Unrealized appreciation (depreciation) on forward currency contracts	(16)	(12)	36	(6)
Total net realized and unrealized gains (losses) on forward currency contracts	$ 12	$ (8)	$ 36	$ (9)

FORWARD CURRENCY CONTRACTS - Un

FORWARD CURRENCY CONTRACTS - Unrealized Appreciation or Depreciation On Forward Currency Contracts (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Fair value
Unrealized depreciation	$ (7)	$ (43)
Morgan Stanley
Fair value
Unrealized depreciation	$ (7)	$ (43)
Morgan Stanley | CAD
Fair value
Currency to be sold	1,619	1,253
Morgan Stanley | USD
Fair value
Currency to be purchased	1,177	903

FORWARD CURRENCY CONTRACTS - No

FORWARD CURRENCY CONTRACTS - Notional Exposure to Foreign Currency Forward Contracts (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
FORWARD CURRENCY CONTRACTS
Forward currency contracts	$ (16)	$ (12)	$ 36	$ (6)
Foreign currency forward contracts
FORWARD CURRENCY CONTRACTS
Forward currency contracts	$ 1,208	$ 401	$ 1,157	$ 395

FORWARD CURRENCY CONTRACTS - Co

FORWARD CURRENCY CONTRACTS - Collateral Received or Pledged (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
FORWARD CURRENCY CONTRACTS
Net Amount of Derivative Liabilities	$ 7	$ 43
Foreign currency forward contracts
FORWARD CURRENCY CONTRACTS
Derivative Liabilities Subject to Master Netting Agreement	7	43
Net Amount of Derivative Liabilities	7	43
Morgan Stanley | Foreign currency forward contracts | CAD
FORWARD CURRENCY CONTRACTS
Derivative Liabilities Subject to Master Netting Agreement	7	43
Net Amount of Derivative Liabilities	$ 7	$ 43

INVESTMENTS - Schedule of Inves

INVESTMENTS - Schedule of Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Investments, amortized cost	$ 704,521	$ 740,021
Investments	660,005	696,168
First lien secured loans
Investments, amortized cost	547,482	584,480
Investments	522,943	555,878
Second lien secured loans
Investments, amortized cost	4,949	24,558
Investments	5,002	16,246
Subordinated Notes
Investments, amortized cost	1,264	167
Investments	1,261	167
Subordinated Note to STRS JV
Investments, amortized cost	84,416	84,416
Investments	84,416	84,416
Equity (excluding STRS JV)
Investments, amortized cost	45,306	25,296
Investments	23,080	16,679
Equity in STRS JV
Investments, amortized cost	21,104	21,104
Investments	$ 23,303	$ 22,782

INVESTMENTS - Portfolio by Indu

INVESTMENTS - Portfolio by Industry Grouping (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Investments	$ 660,005	$ 696,168
Percent of net assets	211.10%	219.70%
Advertising
Investments	$ 12,099	$ 12,040
Air Freight & Logistics
Investments	3,323	3,504
Broadline Retail
Investments	18,759	18,759
Building Products
Investments	13,449	13,313
Construction & Engineering
Investments	15,452	9,550
Data Processing & Outsourced Services
Investments	13,656	14,659
Distributors
Investments	4,123
Diversified Support Services
Investments	19,273	19,136
Drug Retail
Investments	5,089	5,022
Electronic Equipment & Instruments
Investments	13,267	13,269
Environmental & Facilities Services
Investments	36,616	27,278
Food Distributors
Investments	4,934
Health Care Supplies
Investments	7,626	7,530
Household Appliances
Investments	7,857	8,168
Industrial Machinery & Supplies & Components
Investments		6,561
Investment Banking & Brokerage
Investments		4,977
Packaged Foods & Meats
Investments	11,202	6,904
Paper & Plastic Packaging Products & Materials
Investments	6,621	6,471
Personal Products
Investments	5,843	5,957
Real Estate Operating Companies
Investments	6,743	11,903
Research & Consulting Services
Investments	12,044	8,562
Technology Hardware, Storage & Peripherals
Investments	18,061	18,853
Investments Excluding STRS JV's
Investments	$ 552,286	$ 588,970
Percent of net assets	100%	100%
Investments Excluding STRS JV's | Advertising
Investments	$ 14,732	$ 5,285
Percent of net assets	2.70%	0.90%
Investments Excluding STRS JV's | Air Freight & Logistics
Investments	$ 27,841	$ 22,616
Percent of net assets	5%	3.80%
Investments Excluding STRS JV's | Alternative Carriers
Investments	$ 13,621	$ 13,191
Percent of net assets	2.50%	2.20%
Investments Excluding STRS JV's | Application Software
Investments	$ 32,378	$ 34,202
Percent of net assets	5.90%	5.80%
Investments Excluding STRS JV's | Automotive Retail
Investments		$ 12,407
Percent of net assets		2.10%
Investments Excluding STRS JV's | Broadcasting
Investments	$ 8,338	$ 7,243
Percent of net assets	1.50%	1.30%
Investments Excluding STRS JV's | Broadline Retail
Investments	$ 21,868	$ 36,672
Percent of net assets	4%	6.20%
Investments Excluding STRS JV's | Building Products
Investments	$ 14,905	$ 15,863
Percent of net assets	2.70%	2.70%
Investments Excluding STRS JV's | Cable & Satellite
Investments		$ 20,969
Percent of net assets		3.60%
Investments Excluding STRS JV's | Commodity Chemicals
Investments	$ 30,239	$ 30,712
Percent of net assets	5.50%	5.20%
Investments Excluding STRS JV's | Communications Equipment
Investments	$ 8,625
Percent of net assets	1.60%
Investments Excluding STRS JV's | Construction & Engineering
Investments	$ 993	$ 541
Percent of net assets	0.20%	0.10%
Investments Excluding STRS JV's | Construction Materials
Investments	$ 6,306	$ 6,901
Percent of net assets	1.10%	1.20%
Investments Excluding STRS JV's | Data Processing & Outsourced Services
Investments	$ 29,541	$ 21,480
Percent of net assets	5.30%	3.60%
Investments Excluding STRS JV's | Distributors
Investments	$ 11,845	$ 12,475
Percent of net assets	2.10%	2.10%
Investments Excluding STRS JV's | Diversified Chemicals
Investments	$ 4,235	$ 10,259
Percent of net assets	0.80%	1.80%
Investments Excluding STRS JV's | Diversified Support Services
Investments	$ 9,423	$ 9,607
Percent of net assets	1.70%	1.60%
Investments Excluding STRS JV's | Education Services
Investments	$ 11,886	$ 12,570
Percent of net assets	2.20%	2.10%
Investments Excluding STRS JV's | Electric Utilities
Investments	$ 16,083	$ 15,954
Percent of net assets	2.90%	2.70%
Investments Excluding STRS JV's | Environmental & Facilities Services
Investments	$ 23,421	$ 23,878
Percent of net assets	4.20%	4.10%
Investments Excluding STRS JV's | Food Distributors
Investments	$ 317
Percent of net assets	0.10%
Investments Excluding STRS JV's | Health Care Facilities
Investments	$ 8,867	$ 8,966
Percent of net assets	1.60%	1.50%
Investments Excluding STRS JV's | Health Care Services
Investments	$ 10,484	$ 17,643
Percent of net assets	1.90%	3%
Investments Excluding STRS JV's | Health Care Supplies
Investments	$ 18,768	$ 18,983
Percent of net assets	3.40%	3.20%
Investments Excluding STRS JV's | Heavy Electrical Equipment
Investments	$ 10,179	$ 10,135
Percent of net assets	1.80%	1.70%
Investments Excluding STRS JV's | Home Furnishings
Investments	$ 27,653	$ 27,508
Percent of net assets	5%	4.70%
Investments Excluding STRS JV's | Household Appliances
Investments	$ 5,402	$ 5,966
Percent of net assets	1%	1%
Investments Excluding STRS JV's | Household Products
Investments	$ 10,870	$ 10,873
Percent of net assets	2%	1.80%
Investments Excluding STRS JV's | Industrial Machinery & Supplies & Components
Investments	$ 1,253	$ 6,417
Percent of net assets	0.20%	1.10%
Investments Excluding STRS JV's | Interactive Media & Services
Investments	$ 22,932	$ 9,363
Percent of net assets	4.20%	1.60%
Investments Excluding STRS JV's | Investment Banking & Brokerage
Investments		$ 3,522
Percent of net assets		0.60%
Investments Excluding STRS JV's | IT Consulting & Other Services
Investments	$ 6,224	$ 6,549
Percent of net assets	1.10%	1.10%
Investments Excluding STRS JV's | Leisure Facilities
Investments	$ 24,181	$ 22,619
Percent of net assets	4.40%	3.80%
Investments Excluding STRS JV's | Leisure Products
Investments	$ 15,502	$ 12,738
Percent of net assets	2.80%	2.20%
Investments Excluding STRS JV's | Life Sciences Tools & Services
Investments	$ 5,002	$ 4,901
Percent of net assets	0.90%	0.80%
Investments Excluding STRS JV's | Office Services & Supplies
Investments	$ 9,441	$ 21,253
Percent of net assets	1.70%	3.60%
Investments Excluding STRS JV's | Other Diversified Financial Services
Investments		$ 3,472
Percent of net assets		0.60%
Investments Excluding STRS JV's | Packaged Foods & Meats
Investments	$ 4,009
Percent of net assets	0.70%
Investments Excluding STRS JV's | Paper & Plastic Packaging Products & Materials
Investments	$ 61	$ 179
Investments Excluding STRS JV's | Real Estate Development
Investments		$ 10,239
Percent of net assets		1.80%
Investments Excluding STRS JV's | Real Estate Operating Companies
Investments	$ 6,581	$ 6,539
Percent of net assets	1.10%	1.20%
Investments Excluding STRS JV's | Real Estate Services
Investments	$ 10,083
Percent of net assets	1.80%
Investments Excluding STRS JV's | Research & Consulting Services
Investments		$ 16,081
Percent of net assets		2.70%
Investments Excluding STRS JV's | Security & Alarm Services
Investments	$ 6,930
Percent of net assets	1.30%
Investments Excluding STRS JV's | Specialized Consumer Services
Investments	$ 23,339	$ 23,931
Percent of net assets	4.20%	4.10%
Investments Excluding STRS JV's | Systems Software
Investments	$ 11,809	$ 11,523
Percent of net assets	2.10%	2%
Investments Excluding STRS JV's | Technology Hardware, Storage & Peripherals
Investments	$ 18,065	$ 16,745
Percent of net assets	3.30%	2.80%
Investments Excluding STRS JV's | Transaction & Payment Processing Services
Investments	$ 8,054
Percent of net assets	1.50%

INVESTMENTS - Affiliated and Co

INVESTMENTS - Affiliated and Controlled Persons (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Mar. 31, 2023
Investments in and Advances to Affiliates [Line Items]
Weighted average remaining term of debt investments				3 years 1 month 6 days	2 years 9 months 18 days
Cost basis of non-accrual loans	$ 40,199		$ 40,199		$ 38,322
Fair value of non-accrual loans	22,333		22,333		14,087
Cost of investment	704,521		704,521		740,021
Paydown received under investments			121,515	$ 56,765
Net realized losses			(5,728)	(3)
Schedule of investments in and advances to affiliated and controlled persons
Beginning Fair Value			696,168
Net Change in Unrealized Appreciation (Depreciation)			(1,056)	(9,470)
Ending Fair Value	660,005		660,005		696,168
Sklar Holdings, Inc [Member] | First Lien Secured Term Loan [Member]
Investments in and Advances to Affiliates [Line Items]
Cost of investment						$ 3,339
Paydown received under investments		$ 690
Pressurized Holdings, LLC [Member] | Preferred Units [Member]
Investments in and Advances to Affiliates [Line Items]
Cost of investment		3,892		3,892
Non-controlled affiliate company investments
Investments in and Advances to Affiliates [Line Items]
Net realized losses		(339)		(339)
Schedule of investments in and advances to affiliated and controlled persons
Dividends, interest and PIK included in income			368		398
Beginning Fair Value			5,422	9,533	9,533
Gross Additions			21,554		8,441
Gross Reductions					(6,605)
Net Realized Gain (Loss)					(339)
Net Change in Unrealized Appreciation (Depreciation)	58	(3,022)	(9,952)	(4,522)	(5,608)
Ending Fair Value	17,024		17,024		5,422
Controlled affiliate company investments
Schedule of investments in and advances to affiliated and controlled persons
Dividends, interest and PIK included in income			8,954		16,993
Beginning Fair Value			112,948	100,160	100,160
Gross Additions			3,656		21,278
Net Change in Unrealized Appreciation (Depreciation)	825	$ (600)	556	(521)	(8,490)
Ending Fair Value	117,160		117,160		112,948
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	$ 20,099		$ 20,099		$ 20,056
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ABBCon-ciseOpticalGroupLLCMember		whfcl:ABBCon-ciseOpticalGroupLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 18,983
Ending Fair Value	$ 18,768		18,768		$ 18,983
Investment, Identifier [Axis]: ALM Media, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 12,555
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:ALMMediaLLCMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 12,517
Ending Fair Value					$ 12,517
Investment, Identifier [Axis]: APG Lions Purchaser, LLC, First Lien Secured Delayed Draw Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ApgLionsPurchaserLlcMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Identifier [Axis]: APG Lions Purchaser, LLC, First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 68		$ 68
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ApgLionsPurchaserLlcMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Ending Fair Value	$ 68		$ 68
Investment, Identifier [Axis]: APG Lions Purchaser, LLC, First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 4,054		$ 4,054
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ApgLionsPurchaserLlcMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 4,055		$ 4,055
Investment, Identifier [Axis]: ATSG Inc First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 3,725		$ 3,725		$ 3,741
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ATSGIncMember		whfcl:ATSGIncMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 3,745
Ending Fair Value	$ 3,693		3,693		$ 3,745
Investment, Identifier [Axis]: ATSG, First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 9,650		$ 9,650		$ 9,678
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ATSGIncMember		whfcl:ATSGIncMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 9,771
Ending Fair Value	$ 9,633		9,633		$ 9,771
Investment, Identifier [Axis]: Alvaria Holdco (Cayman) (d/b/a Aspect Software, Inc.) First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 1,531		$ 1,531
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:AlvariaHoldcoMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 1,670		$ 1,670
Investment, Identifier [Axis]: Alvaria Holdco (Cayman) (d/b/a Aspect Software, Inc.) First Lien Secured Term Loan Four
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 2,357		$ 2,357
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:AlvariaHoldcoMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 401		$ 401
Investment, Identifier [Axis]: Alvaria Holdco (Cayman) (d/b/a Aspect Software, Inc.) First Lien Secured Term Loan Three
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 9,428		$ 9,428
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:AlvariaHoldcoMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 7,931		$ 7,931
Investment, Identifier [Axis]: Alvaria Holdco (Cayman) (d/b/a Aspect Software, Inc.) First Lien Secured Term Loan Two
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 1,017		$ 1,017
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:AlvariaHoldcoMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 985		$ 985
Investment, Identifier [Axis]: American Crafts Holdings, LLC, Warrants
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:AmericanCraftsHoldingsLlcMember		whfcl:AmericanCraftsHoldingsLlcMember
Investment type	Warrant		Warrant		Warrant
Investment, Identifier [Axis]: American Crafts Lc Super Priority First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 2,043		$ 2,043
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:AmericanCraftsLCMember		whfcl:AmericanCraftsLCMember
Investment type	whfcl:SuperPriorityFirstLienSecuredTermLoanMember		whfcl:SuperPriorityFirstLienSecuredTermLoanMember		whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember
Dividends, interest and PIK included in income			$ 137		$ 109
Beginning Fair Value			1,878
Gross Additions			139		1,903
Net Change in Unrealized Appreciation (Depreciation)			(5)		(25)
Ending Fair Value	$ 2,012		2,012		1,878
Investment, Identifier [Axis]: American Crafts, LC First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 1,458		$ 1,458		$ 1,458
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:AmericanCraftsLCMember		whfcl:AmericanCraftsLCMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Dividends, interest and PIK included in income					$ 95
Beginning Fair Value			$ 93
Gross Additions					1,259
Net Change in Unrealized Appreciation (Depreciation)			(19)		(1,166)
Ending Fair Value	$ 74		74		93
Investment, Identifier [Axis]: American Crafts, LC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 8,720		$ 8,720		$ 8,720
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:AmericanCraftsLCMember		whfcl:AmericanCraftsLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Dividends, interest and PIK included in income					$ 568
Beginning Fair Value			$ 553
Gross Additions					7,491
Net Change in Unrealized Appreciation (Depreciation)			(111)		(6,938)
Ending Fair Value	$ 442		442		553
Investment, Identifier [Axis]: American Crafts, LC Priority First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 5,105		$ 5,105		$ 5,105
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:AmericanCraftsLCMember		whfcl:AmericanCraftsLCMember
Investment type	whfcl:PriorityFirstLienSecuredTermLoanMember		whfcl:PriorityFirstLienSecuredTermLoanMember		whfcl:PriorityFirstLienSecuredTermLoanMember
Dividends, interest and PIK included in income					$ 575
Dividends, interest and PIK included in income			$ (8)
Beginning Fair Value			3,226
Gross Additions					5,105
Net Change in Unrealized Appreciation (Depreciation)			170		(1,879)
Ending Fair Value	$ 3,396		3,396		3,226
Investment, Identifier [Axis]: American Crafts, LC Super Senior Priority First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 2,317		$ 2,317		$ 1,903
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:AmericanCraftsLCMember		whfcl:AmericanCraftsLCMember
Investment type	whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember		whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember		whfcl:SuperPriorityFirstLienSecuredTermLoanMember
Dividends, interest and PIK included in income			$ 53
Beginning Fair Value			1,878
Gross Additions			2,317
Ending Fair Value	$ 2,317		2,317		$ 1,878
Investment, Identifier [Axis]: American Crafts, LC Super Senior Priority First Lien Secured Term Loan Due 01/31/24
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 1,200		$ 1,200
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:AmericanCraftsLCMember
Investment type	whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember		whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember
Ending Fair Value	$ 1,200		$ 1,200
Investment, Identifier [Axis]: American Crafts, LC Super Senior Priority First Lien Secured Term Loan one
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:AmericanCraftsLCMember
Investment type	whfcl:SuperPriorityFirstLienSecuredTermLoanOneMember		whfcl:SuperPriorityFirstLienSecuredTermLoanOneMember
Dividends, interest and PIK included in income			$ 68
Gross Additions			1,200
Ending Fair Value	$ 1,200		$ 1,200
Investment, Identifier [Axis]: Arcole Holding Corporation, Equity
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:ArcoleHoldingCorporationMember
Investment type					Equity (excluding STRS JV)
Dividends, interest and PIK included in income					$ 84
Beginning Fair Value				6,380	6,380
Gross Reductions					(6,605)
Net Realized Gain (Loss)					(339)
Net Change in Unrealized Appreciation (Depreciation)					564
Investment, Identifier [Axis]: Arcserve Cayman GP LLC (d/b/a Arcserve (USA), LLC) Common Units One
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ArcserveCaymanGpLlcMember
Investment type	whfcl:CommonUnitsMember		whfcl:CommonUnitsMember
Investment, Identifier [Axis]: Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC) First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 629		$ 629
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ArcserveCaymanOpcoLpMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Dividends, interest and PIK included in income			$ 56
Gross Additions			629
Net Change in Unrealized Appreciation (Depreciation)			650
Ending Fair Value	$ 1,279		1,279
Investment, Identifier [Axis]: Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC) Unsecured Loan One
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 542		$ 542
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ArcserveCaymanOpcoLpMember
Investment type	whfcl:UnsecuredLoanMember		whfcl:UnsecuredLoanMember
Dividends, interest and PIK included in income			$ 26
Gross Additions			542
Net Change in Unrealized Appreciation (Depreciation)			13
Ending Fair Value	$ 555		555
Investment, Identifier [Axis]: Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC) Unsecured Loan Two
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 555		$ 555
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ArcserveCaymanOpcoLpMember
Investment type	whfcl:UnsecuredLoanMember		whfcl:UnsecuredLoanMember
Dividends, interest and PIK included in income			$ 26
Gross Additions			555
Net Change in Unrealized Appreciation (Depreciation)			13
Ending Fair Value	$ 568		568
Investment, Identifier [Axis]: Arcserve Cayman Topco LP (d/b/a Arcserve (USA), LLC) Common Units Two
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 19,568		$ 19,568
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ArcserveCaymanTopcoLpMember
Investment type	whfcl:CommonUnitsMember		whfcl:CommonUnitsMember
Gross Additions			$ 19,568
Net Change in Unrealized Appreciation (Depreciation)			(10,161)
Ending Fair Value	$ 9,407		9,407
Investment, Identifier [Axis]: Arcstor Midco, LLC (d/b/a Arcserve (USA), LLC Priority First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 1,050
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:ArcstorMidcoLLCMember
Investment type					whfcl:PriorityFirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			1,046
Ending Fair Value					$ 1,046
Investment, Identifier [Axis]: Arcstor Midco, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 19,568
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:ArcstorMidcoLLCMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 10,477
Ending Fair Value					$ 10,477
Investment, Identifier [Axis]: Arteriocyte Medical Systems, Inc. First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ArteriocyteMedicalSystemsInc.Member		whfcl:ArteriocyteMedicalSystemsInc.Member
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Ending Fair Value	$ 8		$ 8
Investment, Identifier [Axis]: Arteriocyte Medical Systems, Inc. First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 4,901		$ 4,901		$ 4,901
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ArteriocyteMedicalSystemsInc.Member		whfcl:ArteriocyteMedicalSystemsInc.Member
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 4,901
Ending Fair Value	$ 4,980		4,980		$ 4,901
Investment, Identifier [Axis]: Atlas Purchaser, Inc First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 2,675
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:AtlasPurchaserIncMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			2,269
Ending Fair Value					$ 2,269
Investment, Identifier [Axis]: Atlas Purchaser, Inc Second Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 14,699
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:AtlasPurchaserIncMember
Investment type					whfcl:SecondLienSecuredTermLoanMember
Beginning Fair Value			$ 9,744
Ending Fair Value					$ 9,744
Investment, Identifier [Axis]: Avision Holdings, LLC (d/b/a Avision Sales Group) First Lien Secured Delayed Draw Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Avision Holdings, LLC (d/b/a Avision Sales Group)
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Identifier [Axis]: Avision Holdings, LLC (d/b/a Avision Sales Group) First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 649		$ 649
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Avision Holdings, LLC (d/b/a Avision Sales Group)
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 649		$ 649
Investment, Identifier [Axis]: Avision Holdings, LLC Class A LLC Interests
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 287		$ 287		$ 287
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Avision Holdings, LLC (d/b/a Avision Sales Group)		Avision Holdings, LLC (d/b/a Avision Sales Group)
Investment type	whfcl:ClassALLCInterestsMember		whfcl:ClassALLCInterestsMember		whfcl:ClassALLCInterestsMember
Beginning Fair Value			$ 411
Ending Fair Value	$ 498		498		$ 411
Investment, Identifier [Axis]: BBQ Buyer, LLC First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 2,613		$ 2,613		$ 2,606
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:BBQBuyerLLCMember		whfcl:BBQBuyerLLCMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			$ 2,613
Ending Fair Value	$ 2,629		2,629		$ 2,613
Investment, Identifier [Axis]: BBQ Buyer, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 12,820		$ 12,820		$ 12,787
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:BBQBuyerLLCMember		whfcl:BBQBuyerLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 12,818
Ending Fair Value	$ 12,892		12,892		$ 12,818
Investment, Identifier [Axis]: BBQ Buyer, LLC Shares
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 1,100		$ 1,100		$ 1,100
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:BBQBuyerLLCMember		whfcl:BBQBuyerLLCMember
Investment type	Common Stock		Common Stock		Common Stock
Beginning Fair Value			$ 1,330
Ending Fair Value	$ 1,119		1,119		$ 1,330
Investment, Identifier [Axis]: BL Products Parent, LP Class A Units
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 788		$ 788		$ 788
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:BLProductsParentLPMember		whfcl:BLProductsParentLPMember
Investment type	whfcl:ClassAUnitsMember		whfcl:ClassAUnitsMember		whfcl:ClassAUnitsMember
Beginning Fair Value			$ 1,053
Ending Fair Value	$ 1,253		1,253		$ 1,053
Investment, Identifier [Axis]: BPII-JL Group Holdings LP Class A Units
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 942		$ 942		$ 825
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:BPII-JLGroupHoldingsLPMember		whfcl:BPII-JLGroupHoldingsLPMember
Investment type	whfcl:ClassAUnitsMember		whfcl:ClassAUnitsMember		whfcl:ClassAUnitsMember
Beginning Fair Value			$ 983
Ending Fair Value	$ 1,400		1,400		$ 983
Investment, Identifier [Axis]: BUSA Acquisition Co. (d/b/a BankCard USA Merchant Services Inc.) First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 714		$ 714
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			BUSA Acquisition Co. (d/b/a BankCard USA Merchant Services Inc.)
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Ending Fair Value	$ 717		$ 717
Investment, Identifier [Axis]: BUSA Acquisition Co. (d/b/a BankCard USA Merchant Services Inc.) First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 7,753		$ 7,753
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			BUSA Acquisition Co. (d/b/a BankCard USA Merchant Services Inc.)
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 7,781		$ 7,781
Investment, Identifier [Axis]: Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc) First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 137
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc.)
Investment type					whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			137
Ending Fair Value					$ 137
Investment, Identifier [Axis]: Banner Acquisition Holdings, LLC First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 1,497		$ 1,497		$ 1,366
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc.)		Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc.)
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			$ 1,365
Ending Fair Value	$ 1,506		1,506		$ 1,365
Investment, Identifier [Axis]: Banner Acquisition Holdings, LLC First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 192		$ 192		$ 191
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc.)		Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc.)
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 191
Ending Fair Value	$ 197		197		$ 191
Investment, Identifier [Axis]: Banner Acquisition Holdings, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 3,023		$ 3,023		$ 3,015
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc.)		Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc.)
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 3,015
Ending Fair Value	$ 3,037		$ 3,037		$ 3,015
Investment, Identifier [Axis]: Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.) First Lien Secured Delayed Draw Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.)		Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.)
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Ending Fair Value	$ (3)		$ (3)
Investment, Identifier [Axis]: Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.) First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 73		$ 73
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.)		Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.)
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Ending Fair Value	$ 76		$ 76
Investment, Identifier [Axis]: Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.) First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 3,554		$ 3,554		$ 3,564
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.)		Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.)
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 3,564
Ending Fair Value	$ 3,584		$ 3,584		$ 3,564
Investment, Identifier [Axis]: Branford Filtration, LLC (d/b/a Clean Solutions Group) First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Branford Filtration, LLC (d/b/a Clean Solutions Group)		Branford Filtration, LLC (d/b/a Clean Solutions Group)
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Ending Fair Value	$ 8		$ 8
Investment, Identifier [Axis]: Branford Filtration, LLC (d/b/a Clean Solutions Group) First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 11,327		$ 11,327		$ 11,358
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Branford Filtration, LLC (d/b/a Clean Solutions Group)		Branford Filtration, LLC (d/b/a Clean Solutions Group)
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 11,358
Ending Fair Value	$ 11,613		11,613		$ 11,358
Investment, Identifier [Axis]: Bridgepoint Healthcare, LLC First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 236		$ 236
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:BridgepointHealthcareLLCMember		whfcl:BridgepointHealthcareLLCMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ (1)
Ending Fair Value	$ 223		223		$ (1)
Investment, Identifier [Axis]: Bridgepoint Healthcare, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 8,715		$ 8,715		$ 8,973
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:BridgepointHealthcareLLCMember		whfcl:BridgepointHealthcareLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 8,967
Ending Fair Value	$ 8,644		8,644		$ 8,967
Investment, Identifier [Axis]: Buckeye Acquiror LLC First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 877		$ 877
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:BuckeyeAcquirorLlcMember		whfcl:BuckeyeAcquirorLlcMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			$ (3)
Ending Fair Value	$ 902		902		$ (3)
Investment, Identifier [Axis]: Buckeye Acquiror LLC First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 265		$ 265		$ 176
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:BuckeyeAcquirorLlcMember		whfcl:BuckeyeAcquirorLlcMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 181
Ending Fair Value	$ 283		283		$ 181
Investment, Identifier [Axis]: Buckeye Acquiror LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 6,035		$ 6,035		$ 5,845
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:BuckeyeAcquirorLlcMember		whfcl:BuckeyeAcquirorLlcMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 5,898
Ending Fair Value	$ 6,192		6,192		$ 5,898
Investment, Identifier [Axis]: Bulk Midco, LLC First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 1,989
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:BulkMidcoLLCMember
Investment type					whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			1,972
Ending Fair Value					$ 1,972
Investment, Identifier [Axis]: Bulk Midco, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 19,237
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:BulkMidcoLLCMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			18,997
Ending Fair Value					$ 18,997
Investment, Identifier [Axis]: CX Holdco LLC Common Units
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 1,116		$ 1,116		$ 1,116
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:CXHoldcoLLCMember		whfcl:CXHoldcoLLCMember
Investment type	whfcl:CommonUnitsMember		whfcl:CommonUnitsMember		whfcl:CommonUnitsMember
Beginning Fair Value			$ 1,715
Ending Fair Value	$ 1,261		1,261		$ 1,715
Investment, Identifier [Axis]: Camp Facility Services Holdings, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 10,869		$ 10,869		$ 11,517
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:CampFacilityServicesHoldingsLLCMember		whfcl:CampFacilityServicesHoldingsLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 11,496
Ending Fair Value	$ 10,899		10,899		$ 11,496
Investment, Identifier [Axis]: Camp Facility Services Parent, LLC Preferred Units
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 840		$ 840		$ 840
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:CampFacilityServicesParentLLCMember		whfcl:CampFacilityServicesParentLLCMember
Investment type	Preferred Units [Member]		Preferred Units [Member]		Preferred Units [Member]
Beginning Fair Value			$ 1,023
Ending Fair Value	$ 1,088		1,088		$ 1,023
Investment, Identifier [Axis]: Cennox Holdings Limited, First lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.25%, Rate 11.56%, Due 5/4/26
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 538		$ 538		$ 1,182
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:CennoxHoldingsLimitedMember		whfcl:CennoxHoldingsLimitedMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 1,082
Ending Fair Value	$ 442		442		$ 1,082
Investment, Identifier [Axis]: Cennox Holdings Limited., First lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 11.59%, 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					whfcl:CennoxHoldingsLimitedMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			3,538
Ending Fair Value					$ 3,538
Investment, Identifier [Axis]: Cennox Holdings Limited., First lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 11.68%, Due 5/4/26
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 3,855		$ 3,855
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:CennoxHoldingsLimitedMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 3,533		$ 3,533
Investment, Identifier [Axis]: Cennox, Inc, First lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 10.40%, Due 5/4/26
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 9,837		$ 9,837
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:CennoxHoldingsLimitedMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 10,052		$ 10,052
Investment, Identifier [Axis]: Cennox, Inc, First lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 10.44%, Due 5/4/26
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 9,851
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:CennoxInc.Member
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 10,257
Ending Fair Value					$ 10,257
Investment, Identifier [Axis]: Chase Products Co. (f/k/a Starco) First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 2,962
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ChaseProductsCoMember		whfcl:ChaseProductsCoMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Dividends, interest and PIK included in income			$ 182		$ 270
Beginning Fair Value			2,793
Gross Additions			182		2,961
Net Change in Unrealized Appreciation (Depreciation)			(17)		(168)
Ending Fair Value	$ 2,958		2,958		2,793
Investment, Identifier [Axis]: Chase Products Co. (f/k/a Starco) First Lien Secured Term Loan 12.00 PIK
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 3,144		$ 3,144
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ChaseProductsCoMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 2,958		$ 2,958
Investment, Identifier [Axis]: Claridge Products and Equipment, LLC First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 629		$ 629		$ 628
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ClaridgeProductsandEquipmentLLCMember		whfcl:ClaridgeProductsandEquipmentLLCMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 496
Ending Fair Value	$ 548		548		$ 496
Investment, Identifier [Axis]: Claridge Products and Equipment, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 6,506		$ 6,506		$ 7,395
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ClaridgeProductsandEquipmentLLCMember		whfcl:ClaridgeProductsandEquipmentLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 6,405
Ending Fair Value	$ 5,758		$ 5,758		$ 6,405
Investment, Identifier [Axis]: Clark Restaurant Service, LLC, First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ClarkRestaurantServiceLlcMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Identifier [Axis]: Clark Restaurant Service, LLC, First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 4,933		$ 4,933
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ClarkRestaurantServiceLlcMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 4,934		$ 4,934
Investment, Identifier [Axis]: CleanChoice Energy, Inc First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 15,759		$ 15,759		$ 15,715
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:CleanChoiceEnergyIncMember		whfcl:CleanChoiceEnergyIncMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 15,954
Ending Fair Value	$ 16,083		$ 16,083		$ 15,954
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			whfcl:CoastalTelevisionBroadcastingGroupLLCMember		whfcl:CoastalTelevisionBroadcastingGroupLLCMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ (3)
Ending Fair Value	$ (1)		(1)		$ (3)
Investment, Identifier [Axis]: Coastal Television Broadcasting Group LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 8,348		$ 8,348		$ 7,329
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:CoastalTelevisionBroadcastingGroupLLCMember		whfcl:CoastalTelevisionBroadcastingGroupLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 7,246
Ending Fair Value	$ 8,339		8,339		$ 7,246
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					$ 13,541
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:DrewFoamCompaniesIncMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			13,313
Ending Fair Value					$ 13,313
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	$ 13,498		$ 13,498
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:DrewFoamCompaniesIncMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 13,449		$ 13,449
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	$ 8,335		$ 8,335
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:E-PhoenixAcquisitionCo.Inc.Member
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 8,387		$ 8,387
Investment, Identifier [Axis]: E-Phoenix Acquisition Co. Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 5.50%, Rate11.00%, Due 6/23/27
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 8,541
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:E-PhoenixAcquisitionCo.Inc.Member
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			8,562
Ending Fair Value					$ 8,562
Investment, Identifier [Axis]: Eddy Acquisitions, LLC Preferred Units
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 167		$ 167		$ 167
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:EddyAcquisitionsLLCMember		whfcl:EddyAcquisitionsLLCMember
Investment type	Preferred Units [Member]		Preferred Units [Member]		Preferred Units [Member]
Beginning Fair Value			$ 18
Ending Fair Value	$ 1		$ 1		$ 18
Investment, Identifier [Axis]: EducationDynamics, LLC First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:EducationDynamicsLLCMember		whfcl:EducationDynamicsLLCMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ (22)
Ending Fair Value	$ (56)		(56)		$ (22)
Investment, Identifier [Axis]: EducationDynamics, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 12,385		$ 12,385		$ 12,647
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:EducationDynamicsLLCMember		whfcl:EducationDynamicsLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 12,407
Ending Fair Value	$ 11,803		11,803		$ 12,407
Investment, Identifier [Axis]: EducationDynamics, LLC Subordinated Unsecured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 167		$ 167		$ 167
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:EducationDynamicsLLCMember		whfcl:EducationDynamicsLLCMember
Investment type	whfcl:SubordinatedUnsecuredTermLoanMember		whfcl:SubordinatedUnsecuredTermLoanMember		whfcl:SubordinatedUnsecuredTermLoanMember
Beginning Fair Value			$ 167
Ending Fair Value	$ 138		138		$ 167
Investment, Identifier [Axis]: Empire Office, Inc First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 4,545
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:EmpireOfficeIncMember
Investment type					whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			4,556
Ending Fair Value					$ 4,556
Investment, Identifier [Axis]: Empire Office, Inc First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 10,931
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:EmpireOfficeIncMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			10,947
Ending Fair Value					$ 10,947
Investment, Identifier [Axis]: Event Services America, Inc. (d/b/a Contemporary Services Corporation) First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 6,840		$ 6,840
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:EventServicesAmericaIncMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 6,930		$ 6,930
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	$ 15,775		$ 15,775		$ 15,786
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:FgiAcquisitionCorpMember		whfcl:FgiAcquisitionCorpMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 16,110
Ending Fair Value	$ 16,110		16,110		$ 16,110
Investment, Identifier [Axis]: Foodservices Brand Group, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 357		$ 357		$ 357
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:FoodservicesBrandGroupLlcMember		whfcl:FoodservicesBrandGroupLlcMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 200
Ending Fair Value	$ 228		228		$ 200
Investment, Identifier [Axis]: Foodservices Brand Group, LLC Second Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 4,915
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:FoodservicesBrandGroupLlcMember
Investment type					whfcl:SecondLienSecuredTermLoanMember
Beginning Fair Value			1,601
Ending Fair Value					$ 1,601
Investment, Identifier [Axis]: Forward Solutions, LLC First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 3,009		$ 3,009		$ 3,018
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ForwardSolutionsLlcMember		whfcl:ForwardSolutionsLlcMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			$ 3,025
Ending Fair Value	$ 3,039		$ 3,039		$ 3,025
Investment, Identifier [Axis]: Forward Solutions, LLC First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ForwardSolutionsLlcMember		whfcl:ForwardSolutionsLlcMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 1
Ending Fair Value	$ 6		6		$ 1
Investment, Identifier [Axis]: Forward Solutions, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 8,965		$ 8,965		$ 8,991
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ForwardSolutionsLlcMember		whfcl:ForwardSolutionsLlcMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 9,014
Ending Fair Value	$ 9,054		9,054		$ 9,014
Investment, Identifier [Axis]: Future Payment Technologies, LP First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 20,982		$ 20,982		$ 21,582
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:FuturePaymentTechnologiesLPMember		whfcl:FuturePaymentTechnologiesLPMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 21,480
Ending Fair Value	$ 21,043		$ 21,043		$ 21,480
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			whfcl:GeoLogicSystemsLtdMember		whfcl:GeoLogicSystemsLtdMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 5
Ending Fair Value	$ 3		3		$ 5
Investment, Identifier [Axis]: Geo Logic Systems Ltd First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 14,431		$ 14,431		$ 14,969
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:GeoLogicSystemsLtdMember		whfcl:GeoLogicSystemsLtdMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 14,654
Ending Fair Value	$ 13,653		13,653		$ 14,654
Investment, Identifier [Axis]: Gulf Winds International Acquisition, LLC (d/b/a Gulf Winds International, Inc.) First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 158		$ 158
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:GulfWindsInternationalAcquisitionLlcMember		whfcl:GulfWindsInternationalAcquisitionLlcMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 7
Ending Fair Value	$ 173		173		$ 7
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	$ 8,832		$ 8,832		$ 4,685
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:GulfWindsInternationalAcquisitionLlcMember		whfcl:GulfWindsInternationalAcquisitionLlcMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 4,738
Ending Fair Value	$ 9,039		$ 9,039		$ 4,738
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			whfcl:HCSalonHoldingsIncMember		whfcl:HCSalonHoldingsIncMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 8
Ending Fair Value	$ 6		6		$ 8
Investment, Identifier [Axis]: HC Salon Holdings, Inc First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 11,244		$ 11,244		$ 11,279
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:HCSalonHoldingsIncMember		whfcl:HCSalonHoldingsIncMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 11,404
Ending Fair Value	$ 11,346		11,346		$ 11,404
Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread Base Plus, 6.22%, Rate 12.10%, Due 10/19/26
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 2,369
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:HrgManagementLlcHomeriverGroupLlcMember
Investment type					whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			2,282
Ending Fair Value					$ 2,282
Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L Plus, 6.22%, Rate 12.03%, Due 10/19/26
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 1,385		$ 1,385
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:HrgManagementLlcHomeriverGroupLlcMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Ending Fair Value	$ 1,359		$ 1,359
Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate 11.72%, Due 10/19/26
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:HrgManagementLlcHomeriverGroupLlcMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Ending Fair Value	$ (23)		$ (23)
Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread Plus, 6.25%, Rate 11.80%, Due 10/19/26
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 589
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:HrgManagementLlcHomeriverGroupLlcMember
Investment type					whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			547
Ending Fair Value					$ 547
Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate 11.72%, Due 10/19/26
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 5,523		$ 5,523
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:HrgManagementLlcHomeriverGroupLlcMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 5,407		$ 5,407
Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus, 6.25%, Rate 11.80%, Due 10/19/26
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 9,448
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:HrgManagementLlcHomeriverGroupLlcMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			9,074
Ending Fair Value					$ 9,074
Investment, Identifier [Axis]: Hollander Intermediate LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 4,664		$ 4,664		$ 4,661
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:HollanderIntermediateLlcMember		whfcl:HollanderIntermediateLlcMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 4,179
Ending Fair Value	$ 4,170		4,170		$ 4,179
Investment, Identifier [Axis]: Honors Holdings, LLC First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 5,267		$ 5,267		$ 4,631
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Honors Holdings, LLC [Member]		Honors Holdings, LLC [Member]
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			$ 4,603
Ending Fair Value	$ 4,490		4,490		$ 4,603
Investment, Identifier [Axis]: Honors Holdings, LLC First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 811		$ 811
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Honors Holdings, LLC [Member]
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Ending Fair Value	$ 689		$ 689
Investment, Identifier [Axis]: Honors Holdings, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 11,736		$ 11,736		$ 9,375
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Honors Holdings, LLC [Member]		Honors Holdings, LLC [Member]
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 9,347
Ending Fair Value	$ 10,023		$ 10,023		$ 9,347
Investment, Identifier [Axis]: ITS Buyer Inc. First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ITSBuyerIncMember		whfcl:ITSBuyerIncMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Ending Fair Value	$ 4		$ 4
Investment, Identifier [Axis]: ITS Buyer Inc. First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 3,297		$ 3,297		$ 3,503
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ITSBuyerIncMember		whfcl:ITSBuyerIncMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 3,504
Ending Fair Value	$ 3,319		3,319		$ 3,504
Investment, Identifier [Axis]: ImageOne Industries, LLC Common A Units
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 8		$ 8		$ 7
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ImageOneIndustriesLLCMember		whfcl:ImageOneIndustriesLLCMember
Investment type	whfcl:CommonAUnitsMember		whfcl:CommonAUnitsMember		whfcl:CommonAUnitsMember
Beginning Fair Value			$ 9
Ending Fair Value	$ 9		9		$ 9
Investment, Identifier [Axis]: Industrial Specialty Services USA LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 10,479		$ 10,479		$ 11,626
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:IndustrialSpecialtyServicesUSALLCMember		whfcl:IndustrialSpecialtyServicesUSALLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 11,537
Ending Fair Value	$ 10,400		10,400		$ 11,537
Investment, Identifier [Axis]: JVMC Holdings Corp First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 3,521
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:JVMCHoldingsCorpMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			3,522
Ending Fair Value					$ 3,522
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	$ 2,334		$ 2,334		$ 2,341
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:JuniperLandscapingHoldingsLLCMember		whfcl:JuniperLandscapingHoldingsLLCMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			$ 2,342
Ending Fair Value	$ 2,355		$ 2,355		$ 2,342
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					$ 197
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:JuniperLandscapingHoldingsLLCMember		whfcl:JuniperLandscapingHoldingsLLCMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 193
Ending Fair Value	$ 10		10		$ 193
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	$ 11,037		$ 11,037		$ 11,073
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:JuniperLandscapingHoldingsLLCMember		whfcl:JuniperLandscapingHoldingsLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 11,080
Ending Fair Value	$ 11,135		$ 11,135		$ 11,080
Investment, Identifier [Axis]: KORE Wireless Group Inc. First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:KoreWirelessGroupIncMember		whfcl:KoreWirelessGroupIncMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Ending Fair Value	$ 11		$ 11
Investment, Identifier [Axis]: KORE Wireless Group Inc. First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 6,270		$ 6,270		$ 6,294
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:KoreWirelessGroupIncMember		whfcl:KoreWirelessGroupIncMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 6,295
Ending Fair Value	$ 6,355		6,355		$ 6,295
Investment, Identifier [Axis]: Keras Holdings, LLC Shares
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 496		$ 496		$ 496
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:KerasHoldingsLLCMember		whfcl:KerasHoldingsLLCMember
Investment type	Common Stock		Common Stock		Common Stock
Beginning Fair Value			$ 683
Ending Fair Value	$ 746		746		$ 683
Investment, Identifier [Axis]: LINC Systems, LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate11.93%, Due 02/24/26
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:LINCSystemsLLCMember
Investment type					whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ (1)
Ending Fair Value					$ (1)
Investment, Identifier [Axis]: LINC Systems, LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate11.94%, Due 2/24/26
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:LINCSystemsLLCMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Ending Fair Value	$ 5		$ 5
Investment, Identifier [Axis]: LINC Systems, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate11.93%, Due 02/24/26
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 8,454
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:LINCSystemsLLCMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			8,443
Ending Fair Value					$ 8,443
Investment, Identifier [Axis]: LINC Systems, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate11.94%, Due 2/24/26
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 8,223		$ 8,223
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:LINCSystemsLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 8,279		$ 8,279
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	$ 13,162		$ 13,162		$ 13,203
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:LMGHoldingsIncMember		whfcl:LMGHoldingsIncMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 13,265
Ending Fair Value	$ 13,261		$ 13,261		$ 13,265
Investment, Identifier [Axis]: LMG Holdings, Inc. First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:LMGHoldingsIncMember		whfcl:LMGHoldingsIncMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 4
Ending Fair Value	$ 6		6		$ 4
Investment, Identifier [Axis]: LSCS Holdings, Inc Second Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 4,949		$ 4,949		$ 4,944
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:LSCSHoldingsIncMember		whfcl:LSCSHoldingsIncMember
Investment type	whfcl:SecondLienSecuredTermLoanMember		whfcl:SecondLienSecuredTermLoanMember		whfcl:SecondLienSecuredTermLoanMember
Beginning Fair Value			$ 4,901
Ending Fair Value	$ 5,002		5,002		$ 4,901
Investment, Identifier [Axis]: Lab Logistics, LLC First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 5,062		$ 5,062		$ 5,089
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:LabLogisticsLLCMember		whfcl:LabLogisticsLLCMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			$ 5,090
Ending Fair Value	$ 5,062		5,062		$ 5,090
Investment, Identifier [Axis]: Lab Logistics, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 5,420		$ 5,420		$ 5,442
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:LabLogisticsLLCMember		whfcl:LabLogisticsLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 5,449
Ending Fair Value	$ 5,422		$ 5,422		$ 5,449
Investment, Identifier [Axis]: Leviathan Intermediate Holdco, LLC First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:LeviathanIntermediateHoldcoLlcMember		whfcl:LeviathanIntermediateHoldcoLlcMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 14
Ending Fair Value	$ 12		12		$ 14
Investment, Identifier [Axis]: Leviathan Intermediate Holdco, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 13,009		$ 13,009		$ 10,098
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:LeviathanIntermediateHoldcoLlcMember		whfcl:LeviathanIntermediateHoldcoLlcMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 10,346
Ending Fair Value	$ 13,411		13,411		$ 10,346
Investment, Identifier [Axis]: Lift Brands, Inc First Lien Secured Term Loan A
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 5,472		$ 5,472		$ 5,492
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:LiftBrandsIncMember		whfcl:LiftBrandsIncMember
Investment type	whfcl:FirstLienSecuredTermLoanAMember		whfcl:FirstLienSecuredTermLoanAMember		whfcl:FirstLienSecuredTermLoanAMember
Beginning Fair Value			$ 5,457
Ending Fair Value	$ 5,489		5,489		$ 5,457
Investment, Identifier [Axis]: Lift Brands, Inc First Lien Secured Term Loan B
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 1,514		$ 1,514		$ 1,441
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:LiftBrandsIncMember		whfcl:LiftBrandsIncMember
Investment type	whfcl:FirstLienSecuredTermLoanBMember		whfcl:FirstLienSecuredTermLoanBMember		whfcl:FirstLienSecuredTermLoanBMember
Beginning Fair Value			$ 1,406
Ending Fair Value	$ 1,519		1,519		$ 1,406
Investment, Identifier [Axis]: Luxury Brand Holdings, Inc First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 4,548		$ 4,548		$ 5,233
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:LuxuryBrandHoldingsIncMember		whfcl:LuxuryBrandHoldingsIncMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 5,280
Ending Fair Value	$ 4,580		$ 4,580		$ 5,280
Investment, Identifier [Axis]: M&M OpCo. LLC (d/b/a Escalent, Inc.) First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			M&M OpCo. LLC (d/b/a Escalent, Inc.)		M&M OpCo. LLC (d/b/a Escalent, Inc.)
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ (1)
Ending Fair Value	$ 6		6		$ (1)
Investment, Identifier [Axis]: M&M OpCo. LLC (d/b/a Escalent, Inc.) First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 4,590		$ 4,590		$ 4,602
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			M&M OpCo. LLC (d/b/a Escalent, Inc.)		M&M OpCo. LLC (d/b/a Escalent, Inc.)
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 4,580
Ending Fair Value	$ 4,702		4,702		$ 4,580
Investment, Identifier [Axis]: MBS Highway, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 9,181		$ 9,181		$ 9,204
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MbsHighwayLlcMember		whfcl:MbsHighwayLlcMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 9,089
Ending Fair Value	$ 9,190		9,190		$ 9,089
Investment, Identifier [Axis]: MGT Merger Target, LLC First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 807		$ 807		$ 378
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MgtMergerTargetLlcMember		whfcl:MgtMergerTargetLlcMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			$ 389
Ending Fair Value	$ 822		$ 822		$ 389
Investment, Identifier [Axis]: MGT Merger Target, LLC First lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MgtMergerTargetLlcMember		whfcl:MgtMergerTargetLlcMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 11
Ending Fair Value	$ 15		15		$ 11
Investment, Identifier [Axis]: MGT Merger Target, LLC First lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 7,076		$ 7,076		$ 6,084
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MgtMergerTargetLlcMember		whfcl:MgtMergerTargetLlcMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 6,194
Ending Fair Value	$ 7,288		7,288		$ 6,194
Investment, Identifier [Axis]: MSI Information Services, Inc First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 818		$ 818		$ 815
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MSIInformationServicesIncMember		whfcl:MSIInformationServicesIncMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 776
Ending Fair Value	$ 690		690		$ 776
Investment, Identifier [Axis]: MSI Information Services, Inc First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 7,266		$ 7,266		$ 7,248
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MSIInformationServicesIncMember		whfcl:MSIInformationServicesIncMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 6,972
Ending Fair Value	$ 6,376		6,376		$ 6,972
Investment, Identifier [Axis]: Manchester Acquisition Sub LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 1,136		$ 1,136		$ 7,587
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ManchesterAcquisitionSubLLCMember		whfcl:ManchesterAcquisitionSubLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 7,215
Ending Fair Value	$ 1,099		1,099		$ 7,215
Investment, Identifier [Axis]: Marlin DTC-LS Midco 2, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.99%, Due 7/1/2025
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:MarlinDTC-LSMidco2LLCMember
Investment type					whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ (3)
Ending Fair Value					$ (3)
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			whfcl:MarlinDTC-LSMidco2LLCMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Ending Fair Value	$ 1		$ 1
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	$ 18,737		$ 18,737
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MarlinDTC-LSMidco2LLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 18,758		$ 18,758
Investment, Identifier [Axis]: Marlin DTC-LS Midco 2., First Lien Secured Term, Floor 1.00%, Spread L plus 6.50%, Rate 11.99%, Due 7/1/25
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 18,798
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:MarlinDTC-LSMidco2LLCMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			18,762
Ending Fair Value					$ 18,762
Investment, Identifier [Axis]: Max Solutions Inc. Common Stock
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 400		$ 400		$ 400
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MaxSolutionsIncMember		whfcl:MaxSolutionsIncMember
Investment type	Common Stock		Common Stock		Common Stock
Beginning Fair Value			$ 179
Ending Fair Value	$ 61		61		$ 179
Investment, Identifier [Axis]: Max Solutions, Inc., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus 7.66%, Rate 13.15%, Due 9/29/28
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:MaxSolutionsIncMember
Investment type					whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			(17)
Ending Fair Value					$ (17)
Investment, Identifier [Axis]: Max Solutions, Inc., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 7.66%, Rate 13.15%, Due 9/29/28
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 6,485
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:MaxSolutionsIncMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			6,488
Ending Fair Value					$ 6,488
Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus 7.66%, Rate 13.20%, Due 9/29/28
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 413		$ 413
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MaxSolutionsIncMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Ending Fair Value	$ 396		$ 396
Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 7.66%, Rate 13.15%, Due 9/29/28
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:MaxSolutionsIncMember
Investment type					whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 7.66%, Rate 13.20%, Due 9/29/28
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MaxSolutionsIncMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Ending Fair Value	$ (6)		$ (6)
Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 7.66%, Rate 13.20%, Due 9/29/28
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 6,463		$ 6,463
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MaxSolutionsIncMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 6,231		$ 6,231
Investment, Identifier [Axis]: Maxor Acquisition, Inc. First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MaxorAcquisitionInc.Member		whfcl:MaxorAcquisitionInc.Member
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 9
Ending Fair Value	$ 11		11		$ 9
Investment, Identifier [Axis]: Maxor Acquisition, Inc. First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 4,910		$ 4,910		$ 4,922
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MaxorAcquisitionInc.Member		whfcl:MaxorAcquisitionInc.Member
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 5,013
Ending Fair Value	$ 5,078		$ 5,078		$ 5,013
Investment, Identifier [Axis]: Medical Device Inc First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MedicalDeviceIncMember		whfcl:MedicalDeviceIncMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 3
Ending Fair Value	$ 5		5		$ 3
Investment, Identifier [Axis]: Medical Device Inc First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 2,591		$ 2,591		$ 2,599
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MedicalDeviceIncMember		whfcl:MedicalDeviceIncMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 2,626
Ending Fair Value	$ 2,633		2,633		$ 2,626
Investment, Identifier [Axis]: Merriman Holdings LP (d/b/a Escalent, Inc.) Class A Units
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 333		$ 333		$ 333
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MerrimanHoldingsLPMember		whfcl:MerrimanHoldingsLPMember
Investment type	whfcl:ClassAUnitsMember		whfcl:ClassAUnitsMember		whfcl:ClassAUnitsMember
Beginning Fair Value			$ 295
Ending Fair Value	$ 341		341		$ 295
Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 11.42%, Due 11/20/27
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 868		$ 868
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MetaBuyerLLCMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Ending Fair Value	$ 878		$ 878
Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 11.56%, Due 11/01/27
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 871
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:MetaBuyerLLCMember
Investment type					whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			883
Ending Fair Value					$ 883
Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Term Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 11.43%, Due 11/20/27
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 956		$ 956
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MetaBuyerLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 967		$ 967
Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Term Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 11.46%, Due 11/01/27
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 959
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:MetaBuyerLLCMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			971
Ending Fair Value					$ 971
Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Term Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 9.65%, Due 11/20/27
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 13,501		$ 13,501
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MetaBuyerLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 12,960		$ 12,960
Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Term Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 9.87%, Due 11/01/27
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 13,552
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:MetaBuyerLLCMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			13,401
Ending Fair Value					$ 13,401
Investment, Identifier [Axis]: Meta Buyer LLC.,First Lien Secured Revolving Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 11.53%, Due 11/01/27
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 1,141
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:MetaBuyerLLCMember
Investment type					whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			1,161
Ending Fair Value					$ 1,161
Investment, Identifier [Axis]: Meta Buyer LLC.,First Lien Secured Revolving Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 12.11%, Due 11/20/27
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 1,143		$ 1,143
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MetaBuyerLLCMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Ending Fair Value	$ 1,160		$ 1,160
Investment, Identifier [Axis]: Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC) First Lien Secured Bridge Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 1,478		$ 1,478		$ 1,420
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC)		Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC)
Investment type	whfcl:FirstLienSecuredBridgeLoanMember		whfcl:FirstLienSecuredBridgeLoanMember		whfcl:FirstLienSecuredBridgeLoanMember
Beginning Fair Value			$ 1,420
Ending Fair Value	$ 1,534		1,534		$ 1,420
Investment, Identifier [Axis]: Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC) First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 394		$ 394
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC)		Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC)
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Ending Fair Value	$ 403		$ 403
Investment, Identifier [Axis]: Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC) First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 261		$ 261
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC)		Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC)
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Ending Fair Value	$ 269		$ 269
Investment, Identifier [Axis]: Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC) First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 9,278		$ 9,278		$ 9,254
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC)		Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC)
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 9,254
Ending Fair Value	$ 9,411		9,411		$ 9,254
Investment, Identifier [Axis]: Monarch Collective Holdings, LLC First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 860		$ 860
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Monarch Collective Holdings, LLC
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Ending Fair Value	$ 860		$ 860
Investment, Identifier [Axis]: Monarch Collective Holdings, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 9,140		$ 9,140
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Monarch Collective Holdings, LLC
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 9,223		$ 9,223
Investment, Identifier [Axis]: Motivational CIV, LLC Class B Units
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 1,250		$ 1,250		$ 1,250
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MotivationalCIVLLCMember		whfcl:MotivationalCIVLLCMember
Investment type	whfcl:ClassBUnitsMember		whfcl:ClassBUnitsMember		whfcl:ClassBUnitsMember
Investment, Identifier [Axis]: Motivational Marketing, LLC First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 1,172		$ 1,172		$ 468
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MotivationalMarketingLLCMember		whfcl:MotivationalMarketingLLCMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 338
Ending Fair Value	$ 1,034		1,034		$ 338
Investment, Identifier [Axis]: Motivational Marketing, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 9,950		$ 9,950		$ 9,888
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:MotivationalMarketingLLCMember		whfcl:MotivationalMarketingLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 8,790
Ending Fair Value	$ 8,776		8,776		$ 8,790
Investment, Identifier [Axis]: NNA Services, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 9,221		$ 9,221		$ 9,354
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:NNAServicesLLCMember		whfcl:NNAServicesLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 9,293
Ending Fair Value	$ 9,270		9,270		$ 9,293
Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.92%, Due 1/21/27
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 718		$ 718
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:NPAVLessorCorp.Member
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Ending Fair Value	$ 645		$ 645
Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.96%, Due 1/21/27
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 716
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:NPAVLessorCorp.Member
Investment type					whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			647
Ending Fair Value					$ 647
Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.92%, Due 1/21/27
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 6,435		$ 6,435
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:NPAVLessorCorp.Member
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 5,785		$ 5,785
Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.96%, Due 1/21/27
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 7,418
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:NPAVLessorCorp.Member
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			6,706
Ending Fair Value					$ 6,706
Investment, Identifier [Axis]: Naviga Inc First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 93		$ 93
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:NavigaIncMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Ending Fair Value	$ 93		$ 93
Investment, Identifier [Axis]: Naviga Inc First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 301		$ 301		$ 271
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:NavigaIncMember		whfcl:NavigaIncMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 268
Ending Fair Value	$ 192		192		$ 268
Investment, Identifier [Axis]: Naviga Inc First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 3,140		$ 3,140		$ 3,148
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:NavigaIncMember		whfcl:NavigaIncMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 3,113
Ending Fair Value	$ 2,003		$ 2,003		$ 3,113
Investment, Identifier [Axis]: New American Crafts Holdings, LLC Class A Units
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:NewAmericanCraftsHoldingsLlcClassaUnitsMember		whfcl:NewAmericanCraftsHoldingsLlcMember
Investment type	whfcl:ClassAUnitsMember		whfcl:ClassAUnitsMember		whfcl:ClassAUnitsMember
Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			PANOS Brands, LLC
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Revolving Loan One
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			PANOS Brands, LLC
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 4,454		$ 4,454
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			PANOS Brands, LLC
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 4,454		$ 4,454
Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Term Loan One
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 4,009		$ 4,009
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			PANOS Brands, LLC
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 4,009		$ 4,009
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			whfcl:PFBHoldcoIncMember
Investment type	whfcl:ClassAUnitsMember		whfcl:ClassAUnitsMember
Ending Fair Value	$ 1,034		$ 1,034
Investment, Identifier [Axis]: PFB Holding Company, LLC (d/b/a PFB Corporation) Class A Units
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 423
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:PfbHoldingCompanyLlcMember
Investment type					whfcl:ClassAUnitsMember
Beginning Fair Value			1,053
Ending Fair Value					$ 1,053
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					$ 698
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:PGDentalNewJerseyParentLLCMember
Investment type					whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			704
Ending Fair Value					$ 704
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					$ 6,348
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:PGDentalNewJerseyParentLLCMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			6,400
Ending Fair Value					$ 6,400
Investment, Identifier [Axis]: PLTFRM Companies, LLC First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 694		$ 694
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			PLTFRM Companies, LLC
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Ending Fair Value	$ 705		$ 705
Investment, Identifier [Axis]: PLTFRM Companies, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 7,730		$ 7,730
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			PLTFRM Companies, LLC
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 7,831		$ 7,831
Investment, Identifier [Axis]: Patagonia Hold co Llc First Lien Secured Term Loans
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 12,480		$ 12,480		$ 12,357
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:PatagoniaHoldcoLLCMember		whfcl:PatagoniaHoldcoLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 13,191
Ending Fair Value	$ 13,621		13,621		$ 13,191
Investment, Identifier [Axis]: Pavement Partners Interco, LLC (d/b/a Pave America, LLC) First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 589		$ 589
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:PavementPartnersIntercoLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 589		$ 589
Investment, Identifier [Axis]: Pavement Partners Interco, LLC First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 559		$ 559		$ 560
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:PaveAmericaLlcMember		whfcl:PavementPartnersIntercoLLCMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			$ 569
Ending Fair Value	$ 575		575		$ 569
Investment, Identifier [Axis]: Pavement Partners Interco, LLC First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 300		$ 300
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:PaveAmericaLlcMember		whfcl:PavementPartnersIntercoLLCMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 5
Ending Fair Value	$ 311		311		$ 5
Investment, Identifier [Axis]: Pavement Partners Interco, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 4,435		$ 4,435		$ 4,344
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:PaveAmericaLlcMember		whfcl:PavementPartnersIntercoLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 4,405
Ending Fair Value	$ 4,556		4,556		$ 4,405
Investment, Identifier [Axis]: Pennsylvania Machine Works, LLC First Lien Secured Term Loan, SOFR 11.61
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 6,498
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:PennsylvaniaMachineWorksLLCMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 6,561
Ending Fair Value					$ 6,561
Investment, Identifier [Axis]: Pirtek Holdco, LLC First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:PirtekHoldcoLLCMember		whfcl:PirtekHoldcoLLCMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Ending Fair Value	$ 7		$ 7
Investment, Identifier [Axis]: Pirtek Holdco, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 7,317		$ 7,317		$ 7,337
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:PirtekHoldcoLLCMember		whfcl:PirtekHoldcoLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 7,337
Ending Fair Value	$ 7,367		$ 7,367		$ 7,337
Investment, Identifier [Axis]: PlayMonster LLC First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:PlaymonsterGroupLLCMember		whfcl:PlaymonsterGroupLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Dividends, interest and PIK included in income					$ (85)
Beginning Fair Value			$ 1,363	2,977	2,977
Net Change in Unrealized Appreciation (Depreciation)			(339)		(1,614)
Ending Fair Value	$ 1,024		$ 1,024		$ 1,363
Investment, Identifier [Axis]: Playmonster Group Equity Inc Common Equity
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:PlaymonsterGroupEquityIncMember		whfcl:PlaymonsterGroupEquityIncMember
Investment type	Common Stock		Common Stock		Common Stock
Investment, Identifier [Axis]: Playmonster Group Equity Inc Preferred Equity
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:PlaymonsterGroupEquityIncMember		whfcl:PlaymonsterGroupEquityIncMember
Investment type	us-gaap:PreferredStockMember		us-gaap:PreferredStockMember		us-gaap:PreferredStockMember
Investment, Identifier [Axis]: Playmonster Group Equity, Inc Common Stock
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 460		$ 460		$ 460
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:PlaymonsterGroupEquityIncMember		whfcl:PlaymonsterGroupEquityIncMember
Investment type	Common Stock		Common Stock		Common Stock
Investment, Identifier [Axis]: Playmonster Group Equity, Inc. Preferred Stock
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 3,600		$ 3,600		$ 3,600
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:PlaymonsterGroupEquityIncMember		whfcl:PlaymonsterGroupEquityIncMember
Investment type	us-gaap:PreferredStockMember		us-gaap:PreferredStockMember		us-gaap:PreferredStockMember
Investment, Identifier [Axis]: Playmonster Group LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 3,661		$ 3,661		$ 3,661
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:PlaymonsterGroupLLCMember		whfcl:PlayMonsterLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 1,363
Ending Fair Value	$ 1,024		$ 1,024		$ 1,363
Investment, Identifier [Axis]: Playmonster Group LLC Priority First Lien Secured Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:PlaymonsterGroupLLCMember		whfcl:PlaymonsterGroupLLCMember
Investment type	whfcl:PriorityFirstLienSecuredTermLoanMember		whfcl:PriorityFirstLienSecuredTermLoanMember		whfcl:PriorityFirstLienSecuredTermLoanMember
Dividends, interest and PIK included in income			$ 78		$ 129
Beginning Fair Value			1,015	176	176
Gross Additions			78		943
Net Change in Unrealized Appreciation (Depreciation)			(38)		(104)
Ending Fair Value	$ 1,055		1,055		1,015
Investment, Identifier [Axis]: Playmonster Group LLC, Priority First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 1,195		$ 1,195		$ 1,118
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:PlaymonsterGroupLLCMember		whfcl:PlayMonsterLLCMember
Investment type	whfcl:PriorityFirstLienSecuredTermLoanMember		whfcl:PriorityFirstLienSecuredTermLoanMember		whfcl:PriorityFirstLienSecuredTermLoanMember
Beginning Fair Value			$ 1,015
Ending Fair Value	$ 1,055		1,055		$ 1,015
Investment, Identifier [Axis]: Potpourri Group, Inc First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 13,767
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:PotpourriGroupIncMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			13,799
Ending Fair Value					$ 13,799
Investment, Identifier [Axis]: Poultry Holdings LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.92% (11.17% Cash + 0.75% PIK), Due 6/28/25
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 6,726		$ 6,726
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:PoultryHoldingsLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 6,748		$ 6,748
Investment, Identifier [Axis]: Poultry Holdings LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.96% (11.21% Cash + 0.75% PIK), Due 6/28/25
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 6,904
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:PoultryHoldingsLLCMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			6,904
Ending Fair Value					$ 6,904
Investment, Identifier [Axis]: Power Service Group CR Acquisition Inc First Lien Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 1,330		$ 1,330		$ 1,336
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:PowerServiceGroupCrAcquisitionIncMember		whfcl:PowerServiceGroupCrAcquisitionIncMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			$ 1,353
Ending Fair Value	$ 1,359		1,359		$ 1,353
Investment, Identifier [Axis]: Power Service Group CR Acquisition Inc First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 8,659		$ 8,659		$ 8,712
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:PowerServiceGroupCrAcquisitionIncMember		whfcl:PowerServiceGroupCrAcquisitionIncMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 8,782
Ending Fair Value	$ 8,820		$ 8,820		$ 8,782
Investment, Identifier [Axis]: Pressurized Holdings, LLC Common Units
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Pressurized Holdings, LLC [Member]		Pressurized Holdings, LLC [Member]
Investment type	whfcl:CommonUnitsMember		whfcl:CommonUnitsMember		whfcl:CommonUnitsMember
Investment, Identifier [Axis]: Pressurized Holdings, LLC Preferred Units
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 4,537		$ 4,537		$ 4,537
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Pressurized Holdings, LLC [Member]		Pressurized Holdings, LLC [Member]
Investment type	Preferred Units [Member]		Preferred Units [Member]		Preferred Units [Member]
Beginning Fair Value			$ 251
Gross Additions					$ 4,537
Net Change in Unrealized Appreciation (Depreciation)			(73)		(4,286)
Ending Fair Value	$ 178		178		251
Investment, Identifier [Axis]: Project Castle, Inc First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 5,536
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:ProjectCastleIncMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			5,364
Ending Fair Value					$ 5,364
Investment, Identifier [Axis]: Quest Events, LLC Common Units
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 360
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:QuestEventsLLCMember
Investment type					whfcl:CommonUnitsMember
Beginning Fair Value			305
Ending Fair Value					$ 305
Investment, Identifier [Axis]: Quest Events, LLC First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 246		$ 246		$ 246
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:QuestEventsLLCMember		whfcl:QuestEventsLLCMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 242
Ending Fair Value	$ 248		248		$ 242
Investment, Identifier [Axis]: Quest Events, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 11,613		$ 11,613		$ 11,663
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:QuestEventsLLCMember		whfcl:QuestEventsLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 11,557
Ending Fair Value	$ 11,651		11,651		$ 11,557
Investment, Identifier [Axis]: Quest Events, LLC Preferred Units
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 367		$ 367
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:QuestEventsLLCMember
Investment type	whfcl:CommonUnitsMember		whfcl:CommonUnitsMember
Ending Fair Value	$ 144		$ 144
Investment, Identifier [Axis]: RCKC Acquisitions LLC First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 2,934		$ 2,934		$ 2,945
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:RCKCAcquisitionsLLCMember		whfcl:RCKCAcquisitionsLLCMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			$ 2,965
Ending Fair Value	$ 2,966		2,966		$ 2,965
Investment, Identifier [Axis]: RCKC Acquisitions LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 10,885		$ 10,885		$ 10,925
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:RCKCAcquisitionsLLCMember		whfcl:RCKCAcquisitionsLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 10,993
Ending Fair Value	$ 10,998		$ 10,998		$ 10,993
Investment, Identifier [Axis]: RCKC Acquisitions LLC, First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 106
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:RCKCAcquisitionsLLCMember		whfcl:RCKCAcquisitionsLLCMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 114
Ending Fair Value	$ 12		12		$ 114
Investment, Identifier [Axis]: RLJ Pro-Vac, Inc. First Lien Secured Term Loan SOFR
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 6,576		$ 6,576
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:RLJPro-VacInc.Member
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 6,610		$ 6,610
Investment, Identifier [Axis]: Ribbon Communications Operating Company, Inc. (d/b/a Ribbon Communications Inc.) First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Ribbon Communications Operating Company, Inc. (d/b/a Ribbon Communications Inc.)
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Identifier [Axis]: Ribbon Communications Operating Company, Inc. (d/b/a Ribbon Communications Inc.) First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 8,625		$ 8,625
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Ribbon Communications Operating Company, Inc. (d/b/a Ribbon Communications Inc.)
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 8,625		$ 8,625
Investment, Identifier [Axis]: Ross-Simons Topco, LP Preferred Units
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 514		$ 514		$ 514
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:Ross-SimonsTopcoLPMember		whfcl:Ross-SimonsTopcoLPMember
Investment type	Preferred Units [Member]		Preferred Units [Member]		Preferred Units [Member]
Beginning Fair Value			$ 832
Ending Fair Value	$ 648		$ 648		$ 832
Investment, Identifier [Axis]: SFS Global Holding Company Warrants
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SFSGlobalHoldingCompanyMember		whfcl:SFSGlobalHoldingCompanyMember
Investment type	Warrant		Warrant		Warrant
Investment, Identifier [Axis]: Salon Republic Holdings, LLC Common Stock
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 400		$ 400
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SalonRepublicHoldingsLlcMember
Investment type	Common Stock		Common Stock
Ending Fair Value	$ 266		$ 266
Investment, Identifier [Axis]: Salon Republic Holdings, LLC First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 887		$ 887		$ 729
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SalonRepublicHoldingsLlcMember		whfcl:SalonRepublicHoldingsLlcMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			$ 745
Ending Fair Value	$ 945		$ 945		$ 745
Investment, Identifier [Axis]: Salon Republic Holdings, LLC First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 245
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SalonRepublicHoldingsLlcMember		whfcl:SalonRepublicHoldingsLlcMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 258
Ending Fair Value	$ 18		18		$ 258
Investment, Identifier [Axis]: Salon Republic Holdings, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 4,993		$ 4,993		$ 5,001
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SalonRepublicHoldingsLlcMember		whfcl:SalonRepublicHoldingsLlcMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 5,077
Ending Fair Value	$ 5,125		5,125		$ 5,077
Investment, Identifier [Axis]: Salon Republic Holdings, LLC, Preferred Stock
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 200		$ 200
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SalonRepublicHoldingsLlcMember
Investment type	us-gaap:PreferredStockMember		us-gaap:PreferredStockMember
Ending Fair Value	$ 227		$ 227
Investment, Identifier [Axis]: Salon Republic Investments 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					whfcl:SalonRepublicInvestmentsLlcMember
Investment type					Common Stock
Beginning Fair Value			241
Ending Fair Value					$ 241
Investment, Identifier [Axis]: Salon Republic Investments 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					whfcl:SalonRepublicInvestmentsLlcMember
Investment type					us-gaap:PreferredStockMember
Beginning Fair Value			218
Ending Fair Value					$ 218
Investment, Identifier [Axis]: Sigue Corporation Warrants
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 2,890		$ 2,890		$ 2,890
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SigueCorporationMember		whfcl:SigueCorporationMember
Investment type	Warrant		Warrant		Warrant
Beginning Fair Value			$ 3,472
Ending Fair Value					$ 3,472
Investment, Identifier [Axis]: Sleep OpCo LLC First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SleepOpCoLLCMember		whfcl:SleepOpCoLLCMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 3
Ending Fair Value	$ 24		24		$ 3
Investment, Identifier [Axis]: Sleep OpCo LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 20,322		$ 20,322		$ 20,385
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SleepOpCoLLCMember		whfcl:SleepOpCoLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 20,407
Ending Fair Value	$ 20,511		20,511		$ 20,407
Investment, Identifier [Axis]: Smalto Inc, First Lien Secured Term Loan Interest Rate 10.18
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					whfcl:SmaltoInc.Member
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			7,172
Ending Fair Value					$ 7,172
Investment, Identifier [Axis]: Smalto Inc, First Lien Secured Term Loan Interest Rate 10.22
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 6,673		$ 6,673
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SmaltoInc.Member
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 6,879		$ 6,879
Investment, Identifier [Axis]: Smalto Inc, First Lien Secured Term Loan Interest Rate 11.48
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 966		$ 966
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SmaltoInc.Member
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 978		$ 978
Investment, Identifier [Axis]: Smalto Inc, First Lien Secured Term Loan Interest Rate 11.50
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 987
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:SmaltoInc.Member
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			996
Ending Fair Value					$ 996
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		$ 1,941
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SnapFitnessHoldingsIncMember		whfcl:SnapFitnessHoldingsIncMember
Investment type	us-gaap:CommonClassAMember		us-gaap:CommonClassAMember		us-gaap:CommonClassAMember
Beginning Fair Value			$ 130
Ending Fair Value	$ 167		167		$ 130
Investment, Identifier [Axis]: Snap Fitness Holdings, Inc First Lien Secured Term Loan C
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 1,734		$ 1,734		$ 1,654
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SnapFitnessHoldingsIncMember		whfcl:SnapFitnessHoldingsIncMember
Investment type	whfcl:FirstLienSecuredTermLoanCMember		whfcl:FirstLienSecuredTermLoanCMember		whfcl:FirstLienSecuredTermLoanCMember
Beginning Fair Value			$ 1,623
Ending Fair Value	$ 1,736		1,736		$ 1,623
Investment, Identifier [Axis]: Snap Fitness Holdings, Inc Warrants
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 793		$ 793		$ 793
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SnapFitnessHoldingsIncMember		whfcl:SnapFitnessHoldingsIncMember
Investment type	Warrant		Warrant		Warrant
Beginning Fair Value			$ 53
Ending Fair Value	$ 68		68		$ 53
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate 11.95
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 2,288		$ 2,288
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SolarHoldingsBidcoLimitedMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Ending Fair Value	$ 2,338		$ 2,338
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate 12.05
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 570		$ 570
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SolarHoldingsBidcoLimitedMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Ending Fair Value	$ 582		$ 582
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate CDOR
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 324		$ 324		$ 324
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SolarHoldingsBidcoLimitedMember		whfcl:SolarHoldingsBidcoLimitedMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			$ 342
Ending Fair Value	$ 335		$ 335		$ 342
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate CORRA
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SolarHoldingsBidcoLimitedMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Ending Fair Value	$ 21		$ 21
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate SONIA
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 882
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:SolarHoldingsBidcoLimitedMember
Investment type					whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			984
Ending Fair Value					$ 984
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan SOFR One
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:SolarHoldingsBidcoLimitedMember
Investment type					whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Term Loan CDOR
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 2,765		$ 2,765		$ 2,759
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SolarHoldingsBidcoLimitedMember		whfcl:SolarHoldingsBidcoLimitedMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 2,892
Ending Fair Value	$ 2,830		2,830		$ 2,892
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Term Loan SF
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 2,750		$ 2,750		$ 2,744
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SolarHoldingsBidcoLimitedMember		whfcl:SolarHoldingsBidcoLimitedMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 2,786
Ending Fair Value	$ 2,807		2,807		$ 2,786
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Term Loan SONIA
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 205		$ 205		$ 205
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SolarHoldingsBidcoLimitedMember		whfcl:SolarHoldingsBidcoLimitedMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 217
Ending Fair Value	$ 216		216		$ 217
Investment, Identifier [Axis]: Solar Holdings Bidco Limited, First Lien Secured Delayed Draw Loan, Interest Rate SOFR
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 360
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:SolarHoldingsBidcoLimitedMember
Investment type					whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			366
Ending Fair Value					$ 366
Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus, 6.50%, Rate 11.92%, Due 7/30/27
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 3,853		$ 3,853
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SourceCodeHoldingsLLCMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Ending Fair Value	$ 3,878		$ 3,878
Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus, 6.50%, Rate 11.96%, Due 7/30/27
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 4,039
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:SourceCodeHoldingsLLCMember
Investment type					whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			4,047
Ending Fair Value					$ 4,047
Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus, 6.50%, Rate 11.92%, Due 7/30/27
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 14,092		$ 14,092
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SourceCodeHoldingsLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 14,183		$ 14,183
Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus, 6.50%, Rate 11.96%, Due 7/30/27
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 14,772
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:SourceCodeHoldingsLLCMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			14,806
Ending Fair Value					$ 14,806
Investment, Identifier [Axis]: Sterling Pure Blocker, LLC (d/b/a Banner Industries, Inc.) Class B Units
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 404		$ 404		$ 404
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SterlingPureBlockerLlcMember		whfcl:SterlingPureBlockerLlcMember
Investment type	whfcl:ClassBUnitsMember		whfcl:ClassBUnitsMember		whfcl:ClassBUnitsMember
Beginning Fair Value			$ 404
Ending Fair Value	$ 404		404		$ 404
Investment, Identifier [Axis]: StoicLane MidCo, LLC First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 5,466
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:StoiclaneMidcoLlcMember
Investment type					whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			5,633
Ending Fair Value					$ 5,633
Investment, Identifier [Axis]: StoicLane MidCo, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 4,518
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:StoiclaneMidcoLlcMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			4,606
Ending Fair Value					$ 4,606
Investment, Identifier [Axis]: Sunless, Inc.., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.75%, Rate 12.24%, Due 8/13/25
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 884		$ 884		$ 485
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SunlessInc.Member		whfcl:SunlessInc.Member
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 484
Ending Fair Value	$ 887		887		$ 484
Investment, Identifier [Axis]: Sunless, Inc.., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.75%, Rate 12.24%, Due 8/13/25
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 4,926		$ 4,926		$ 5,459
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:SunlessInc.Member		whfcl:SunlessInc.Member
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 5,473
Ending Fair Value	$ 4,956		$ 4,956		$ 5,473
Investment, Identifier [Axis]: TOT Group, Inc. (d/b/a Net Element Inc.) First Lien Secured Delayed Draw Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			TOT Group, Inc. (d/b/a Net Element Inc.)
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Identifier [Axis]: TOT Group, Inc. (d/b/a Net Element Inc.) First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			TOT Group, Inc. (d/b/a Net Element Inc.)
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Identifier [Axis]: TOT Group, Inc. (d/b/a Net Element Inc.) First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 8,054		$ 8,054
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			TOT Group, Inc. (d/b/a Net Element Inc.)
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 8,054		$ 8,054
Investment, Identifier [Axis]: TOUR Intermediate Holdings., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.96%, Due 5/15/25
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 2,315
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:TOURIntermediateHoldingsLLCMember
Investment type					whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			2,320
Ending Fair Value					$ 2,320
Investment, Identifier [Axis]: TOUR Intermediate Holdings., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.96%, Due 5/15/25
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 2,643
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:TOURIntermediateHoldingsLLCMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			2,657
Ending Fair Value					$ 2,657
Investment, Identifier [Axis]: Team Car Care Holdings, First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment					$ 12,391
Schedule of investments in and advances to affiliated and controlled persons
Issuer name					whfcl:TeamCarCareHoldingsLLCMember
Investment type					First Lien Secured Term Loan [Member]
Beginning Fair Value			12,407
Ending Fair Value					$ 12,407
Investment, Identifier [Axis]: Telestream Holdings Corporation First Lien Secured Revolving Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 1,053		$ 1,053		$ 1,228
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Telestream Holdings Corporation		Telestream Holdings Corporation
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 1,223
Ending Fair Value	$ 1,043		1,043		$ 1,223
Investment, Identifier [Axis]: Telestream Holdings Corporation First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 17,153		$ 17,153		$ 15,580
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			Telestream Holdings Corporation		Telestream Holdings Corporation
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 15,522
Ending Fair Value	$ 17,022		$ 17,022		$ 15,522
Investment, Identifier [Axis]: The Kyjen Company, LLC First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:TheKyjenCompanyLLCMember		whfcl:TheKyjenCompanyLLCMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ (31)
Ending Fair Value	$ (33)		(33)		$ (31)
Investment, Identifier [Axis]: The Kyjen Company, LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 11,299		$ 11,299		$ 11,282
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:TheKyjenCompanyLLCMember		whfcl:TheKyjenCompanyLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 10,904
Ending Fair Value	$ 10,903		10,903		$ 10,904
Investment, Identifier [Axis]: Token Buyer, Inc First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 6,702		$ 6,702		$ 6,695
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:TokenBuyerIncMember		whfcl:TokenBuyerIncMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 5,966
Ending Fair Value	$ 5,402		5,402		$ 5,966
Investment, Identifier [Axis]: Transervice Holdings, Inc. (d/b/a Transervice Logistics, Inc.) First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 8,565		$ 8,565		$ 8,648
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:TranserviceHoldingsIncMember		whfcl:TranserviceHoldingsIncMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 8,743
Ending Fair Value	$ 8,819		8,819		$ 8,743
Investment, Identifier [Axis]: Trimlite Buyer LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 14,988		$ 14,988		$ 15,472
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:TrimliteBuyerLLCMember		whfcl:TrimliteBuyerLLCMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 14,810
Ending Fair Value	$ 13,871		$ 13,871		$ 14,810
Investment, Identifier [Axis]: TriplePoint Acquisition Holdings LLC First Lien Secured Delayed Draw Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:TriplepointAcquisitionHoldingsLlcMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Identifier [Axis]: TriplePoint Acquisition Holdings LLC First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:TriplepointAcquisitionHoldingsLlcMember
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Identifier [Axis]: TriplePoint Acquisition Holdings LLC First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 5,270		$ 5,270
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:TriplepointAcquisitionHoldingsLlcMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 5,270		$ 5,270
Investment, Identifier [Axis]: Turnberry Solutions., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus5.75%, Rate 11.45%, Due 9/2/26
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:TurnberrySolutionsInc.Member		whfcl:TurnberrySolutionsInc.Member
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Beginning Fair Value			$ 2
Ending Fair Value	$ 6		6		$ 2
Investment, Identifier [Axis]: Turnberry Solutions., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus5.75%, Rate 11.45%, Due 9/2/26
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 5,943		$ 5,943		$ 5,962
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:TurnberrySolutionsInc.Member		whfcl:TurnberrySolutionsInc.Member
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 5,979
Ending Fair Value	$ 5,995		5,995		$ 5,979
Investment, Identifier [Axis]: Twin Ridge CRS, LP (d/b/a CRS OneSource) Class A Common Units
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 317		$ 317
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:TwinRidgeCrsLpMember
Investment type	whfcl:ClassCommonUnitsMember		whfcl:ClassCommonUnitsMember
Ending Fair Value	$ 317		$ 317
Investment, Identifier [Axis]: US Methanol Midco LLC (d/b/a US Methanol LLC) First Lien Secured Delayed Draw Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 8,973		$ 8,973		$ 9,345
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:UsMethanolMidcoLlcMember		whfcl:UsMethanolMidcoLlcMember
Investment type	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Beginning Fair Value			$ 9,449
Ending Fair Value	$ 9,136		9,136		$ 9,449
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	$ 4,916		$ 4,916		$ 5,111
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:UsMethanolMidcoLlcMember		whfcl:UsMethanolMidcoLlcMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 5,153
Ending Fair Value	$ 4,993		4,993		$ 5,153
Investment, Identifier [Axis]: UserZoom Technologies, Inc. First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 9,594		$ 9,594		$ 9,570
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:UserzoomTechnologiesIncMember		whfcl:UserzoomTechnologiesIncMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 9,719
Ending Fair Value	$ 9,913		9,913		$ 9,719
Investment, Identifier [Axis]: Vistria Blocked MGT Investor, LP (d/b/a MGT Consulting Group) Series A Units
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 314		$ 314		$ 314
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:VistriaBlockedMgtInvestorLpMember		whfcl:VistriaBlockedMgtInvestorLpMember
Investment type	whfcl:ClassAUnitsMember		whfcl:ClassAUnitsMember		whfcl:SeriesUnitsMember
Beginning Fair Value			$ 406
Ending Fair Value	$ 524		$ 524		$ 406
Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Equity
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:WHFSTRSOhioSeniorLoanFundLLCMember		whfcl:WHFSTRSOhioSeniorLoanFundLLCMember
Investment type	Equity (excluding STRS JV)		Equity (excluding STRS JV)		Equity (excluding STRS JV)
Dividends, interest and PIK included in income			$ 3,712		$ 6,158
Beginning Fair Value			22,782	20,160	20,160
Gross Additions					1,104
Net Change in Unrealized Appreciation (Depreciation)			521		1,518
Ending Fair Value	$ 23,303		23,303		22,782
Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Interests
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 21,104		$ 21,104		$ 21,104
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:WHFSTRSOhioSeniorLoanFundMember		whfcl:WHFSTRSOhioSeniorLoanFundMember
Investment type	whfcl:LLCInterestsMember		whfcl:LLCInterestsMember		whfcl:LLCInterestsMember
Beginning Fair Value			$ 22,782
Ending Fair Value	$ 23,303		23,303		$ 22,782
Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Subordinated Note
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 84,416		$ 84,416		$ 84,416
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:WHFSTRSOhioSeniorLoanFundLLCMember		whfcl:WHFSTRSOhioSeniorLoanFundLLCMember
Investment type	Subordinated Notes		Subordinated Notes		Subordinated Notes
Dividends, interest and PIK included in income			$ 4,992		$ 9,488
Beginning Fair Value			84,416	$ 80,000	80,000
Gross Additions					4,416
Ending Fair Value	$ 84,416		84,416		84,416
Investment, Identifier [Axis]: What If Media Group, LLC Common Units
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 851		$ 851		$ 851
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:WhatIfMediaGroupLLCMember		whfcl:WhatIfMediaGroupLLCMember
Investment type	whfcl:CommonUnitsMember		whfcl:CommonUnitsMember		whfcl:CommonUnitsMember
Beginning Fair Value			$ 1,615
Ending Fair Value	$ 1,919		1,919		$ 1,615
Investment, Identifier [Axis]: Whitestone Home Furnishings, LLC (d/b/a Saatva, Inc.) First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 2,903		$ 2,903		$ 2,919
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:WhitestoneHomeFurnishingsLlcMember		whfcl:WhitestoneHomeFurnishingsLlcMember
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Beginning Fair Value			$ 2,919
Ending Fair Value	$ 2,948		$ 2,948		$ 2,919
Investment, Identifier [Axis]: Zephyr Buyer, L.P. (d/b/a The Weather Company, LLC) First Lien Secured Revolving Loan
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ZephyrBuyerL.p.Member
Investment type	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Ending Fair Value	$ 13		$ 13
Investment, Identifier [Axis]: Zephyr Buyer, L.P. (d/b/a The Weather Company, LLC) First Lien Secured Term Loan
Investments in and Advances to Affiliates [Line Items]
Cost of investment	$ 13,829		$ 13,829
Schedule of investments in and advances to affiliated and controlled persons
Issuer name			whfcl:ZephyrBuyerL.p.Member
Investment type	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Ending Fair Value	$ 13,934		$ 13,934

INVESTMENTS - WHF STRS Ohio Sen

INVESTMENTS - WHF STRS Ohio Senior Loan Fund LLC (Details) $ in Thousands						1 Months Ended	6 Months Ended		12 Months Ended
	May 08, 2024	May 18, 2023	Jan. 13, 2023 USD ($)	Mar. 11, 2022 USD ($)	Jul. 15, 2021	Jul. 31, 2019	Jun. 30, 2024 USD ($) company	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) company	Feb. 28, 2023 USD ($)	Mar. 10, 2022 USD ($)	Feb. 28, 2022 USD ($)	Jan. 27, 2021 USD ($)	Jul. 19, 2019 USD ($)	Jan. 14, 2019 USD ($)
Schedule of Investments [Line Items]
Investments							$ 660,005		$ 696,168
Cost of investment							704,521		740,021
Increase in credit facility limit							(72)	$ 301
Available							166,884		$ 138,488
Amortized Cost, credit facility							$ 358,896
LIBOR | Minimum
Schedule of Investments [Line Items]
Term of interest						3 years	3 years
LIBOR | Maximum
Schedule of Investments [Line Items]
Term of interest						6 years	6 years
EurIBOR, SONIA or CDOR
Schedule of Investments [Line Items]
Variable interest rate (as a percent)							2.82%		2.35%
State Teachers Retirement System Joint Venture Credit Facility, EUR, GBP and USD Denominated Borrowings | Base Rate
Schedule of Investments [Line Items]
Variable interest rate (as a percent)	2.50%
State Teachers Retirement System Joint Venture Credit Facility, CAD Denominated Borrowings | Base Rate
Schedule of Investments [Line Items]
Variable interest rate (as a percent)	2.82%
Subordinated Notes
Schedule of Investments [Line Items]
Investments							$ 1,261		$ 167
Cost of investment							1,264		167
Equity (excluding STRS JV)
Schedule of Investments [Line Items]
Investments							46,383		39,461
Cost of investment							$ 66,410		$ 46,400
STRS JV
Schedule of Investments [Line Items]
Combined investment commitment in joint venture															$ 125,000
Investment commitment in joint venture										$ 115,000		$ 100,000			75,000
Increase in investment commitment in joint venture										$ 15,000		$ 25,000
Economic ownership (as a percent)							65.71%		34.29%	65.71%		66.67%
Investments							$ 345,007		$ 332,160
Portfolio companies | company							38		34
Largest single investment							$ 19,791		$ 19,889
Five largest investments							80,787		83,564
STRS JV | STRS JV Credit Facility
Schedule of Investments [Line Items]
Maximum borrowing limit			$ 262,500	$ 225,000			$ 262,500		262,500				$ 175,000	$ 125,000
Increase in credit facility limit			37,500
Variable interest rate (as a percent)					2.35%		2.50%
Available				168,750							$ 131,250
Borrowings greater than				$ 175,000
Amortized Cost, credit facility							$ 177,786		$ 165,244
Effective interest rate (as a percent)							7.60%		7.70%
STRS JV | STRS JV Credit Facility | SOFR
Schedule of Investments [Line Items]
Maximum borrowing limit			$ 175,000
Variable interest rate (as a percent)		2.72%		2.50%					2.72%
Effective interest rate (as a percent)			2.71%
STRS JV | STRS JV Credit Facility | SOFR | Borrowings under $37.5 million
Schedule of Investments [Line Items]
Variable interest rate (as a percent)			3%
STRS JV | Subordinated Notes
Schedule of Investments [Line Items]
Investment commitment in joint venture										$ 92,000		$ 80,000
Cost of investment									$ 84,416
Commitments to fund subordinated notes							$ 92,000		92,000
Unfunded subordinated notes							7,584		7,584
STRS JV | Equity (excluding STRS JV)
Schedule of Investments [Line Items]
Investment commitment in joint venture										23,000		$ 20,000
Cost of investment							21,104
Commitments to fund equity interests							23,000		23,000
Unfunded equity interests							$ 1,896		$ 1,896
STRS JV | STRS Ohio
Schedule of Investments [Line Items]
Investment commitment in joint venture										60,000					$ 50,000
Increase in investment commitment in joint venture										$ 10,000
Economic ownership (as a percent)										34.29%		33.33%
STRS JV | STRS Ohio | Subordinated Notes
Schedule of Investments [Line Items]
Investment commitment in joint venture										$ 48,000
STRS JV | STRS Ohio | Equity (excluding STRS JV)
Schedule of Investments [Line Items]
Investment commitment in joint venture										$ 12,000

INVESTMENTS - STRS JVs individu

INVESTMENTS - STRS JVs individual Investments (Details) $ in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($) shares	Jun. 30, 2024 CAD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Schedule of Investments [Line Items]
Investment Owned, at Cost	$ 704,521	$ 740,021
Investment Owned, at Fair Value	$ 660,005	$ 696,168
Percent of net assets	211.10%	219.70%	211.10%
Total investments and money market funds amortized cost	$ 718,850
Total investments and money market funds fair value	$ 674,334
Total investments and money market funds percentage	215.70%		215.70%
STRS JV
Schedule of Investments [Line Items]
Investment Owned, at Cost	$ 324,993	$ 312,807
Investments owned non-accrual status				$ 0
Investment Owned, at Fair Value	$ 324,844	$ 312,217
Fair Value As A Percentage of Member's Equity	916%	900.60%
Percent of net assets	916%	900.60%	916%
Total investments and money market funds amortized cost	$ 328,191
Total investments and money market funds fair value	$ 328,042
Total investments and money market funds percentage	925.10%		925.10%
Debt Investments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 638,111	$ 693,621
Investment Owned, at Fair Value	$ 613,622	$ 656,707
Percent of net assets	196.30%	207.40%	196.30%
Money Market Funds
Schedule of Investments [Line Items]
Money Market Funds amortized cost	$ 14,329
Money Market Fair Value	$ 14,329
Percent of net assets	4.60%		4.60%
Money Market Funds | STRS JV
Schedule of Investments [Line Items]
Money Market Funds amortized cost	$ 3,198
Money Market Fair Value	$ 3,198
Percent of net assets	9.10%		9.10%
Goldman Sachs Money Market Fund (CUSIP: 38141W315)
Schedule of Investments [Line Items]
Weighted average interest rate	5.20%		5.20%
Money Market Funds amortized cost	$ 1,515
Money Market Fair Value	$ 1,515
Percent of net assets	0.50%		0.50%
Goldman Sachs Money Market Fund (CUSIP: 38141W315) | STRS JV
Schedule of Investments [Line Items]
Weighted average interest rate	5.20%		5.20%
Money Market Funds amortized cost	$ 2,078
Money Market Fair Value	$ 2,078
Percent of net assets	5.90%		5.90%
Invesco Treasury Money Market Fund (CUSIP: X9USDINVE)
Schedule of Investments [Line Items]
Weighted average interest rate	4.66%		4.66%
Money Market Funds amortized cost	$ 12,814
Money Market Fair Value	$ 12,814
Percent of net assets	4.10%		4.10%
Invesco Treasury Money Market Fund (CUSIP: X9USDINVE) | STRS JV
Schedule of Investments [Line Items]
Weighted average interest rate	5.10%		5.10%
Money Market Funds amortized cost	$ 1,120
Money Market Fair Value	$ 1,120
Percent of net assets	3.20%		3.20%
Advertising
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 11,974	$ 12,009
Investment Owned, at Fair Value	$ 12,099	$ 12,040
Fair Value As A Percentage of Member's Equity	34.10%	34.70%
Advertising | Debt Investments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 13,663	$ 4,602
Investment Owned, at Fair Value	$ 13,893	$ 4,579
Percent of net assets	4.50%	1.40%	4.50%
Air Freight & Logistics
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 3,297	$ 3,503
Investment Owned, at Fair Value	$ 3,323	$ 3,504
Fair Value As A Percentage of Member's Equity	9.40%	10.10%
Air Freight & Logistics | Debt Investments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 28,677	$ 23,689
Investment Owned, at Fair Value	$ 27,841	$ 22,616
Percent of net assets	9%	7.20%	9%
Application Software | Debt Investments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 36,642	$ 39,567
Investment Owned, at Fair Value	$ 32,378	$ 34,202
Percent of net assets	10.30%	11%	10.30%
Broadline Retail
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 18,737	$ 18,798
Investment Owned, at Fair Value	$ 18,759	$ 18,759
Fair Value As A Percentage of Member's Equity	52.90%	54.10%
Broadline Retail | Debt Investments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 19,981	$ 34,393
Investment Owned, at Fair Value	$ 20,101	$ 34,510
Percent of net assets	6.50%	11%	6.50%
Building Products
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 13,498	$ 13,541
Investment Owned, at Fair Value	$ 13,449	$ 13,313
Fair Value As A Percentage of Member's Equity	37.90%	38.40%
Building Products | Debt Investments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 14,988	$ 15,472
Investment Owned, at Fair Value	$ 13,871	$ 14,810
Percent of net assets	4.40%	4.70%	4.40%
Construction & Engineering
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 15,276	$ 9,476
Investment Owned, at Fair Value	$ 15,452	$ 9,550
Fair Value As A Percentage of Member's Equity	43.60%	27.40%
Construction & Engineering | Debt Investments
Schedule of Investments [Line Items]
Investment Owned, at Cost	$ 589	$ 137
Investment Owned, at Fair Value	$ 589	137
Percent of net assets	0.20%		0.20%
Data Processing & Outsourced Services
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 14,431	14,969
Investment Owned, at Fair Value	$ 13,656	$ 14,659
Fair Value As A Percentage of Member's Equity	38.50%	42.30%
Data Processing & Outsourced Services | Debt Investments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 29,449	$ 21,582
Investment Owned, at Fair Value	$ 29,541	$ 21,480
Percent of net assets	9.40%	6.80%	9.40%
Drug Retail
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 4,910	$ 4,922
Investment Owned, at Fair Value	$ 5,089	$ 5,022
Fair Value As A Percentage of Member's Equity	14.30%	14.50%
Diversified Support Services
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 19,176	$ 19,246
Investment Owned, at Fair Value	$ 19,273	$ 19,136
Fair Value As A Percentage of Member's Equity	54.40%	55.20%
Diversified Support Services | Debt Investments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 9,221	$ 9,354
Investment Owned, at Fair Value	$ 9,270	$ 9,293
Percent of net assets	3%	2.90%	3%
Electronic Equipment & Instruments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 13,162	$ 13,203
Investment Owned, at Fair Value	$ 13,267	$ 13,269
Fair Value As A Percentage of Member's Equity	37.40%	38.30%
Environmental & Facilities Services
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 36,026	$ 26,906
Investment Owned, at Fair Value	$ 36,616	$ 27,278
Fair Value As A Percentage of Member's Equity	103.10%	78.70%
Environmental & Facilities Services | Debt Investments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 21,806	$ 22,984
Investment Owned, at Fair Value	$ 22,021	$ 22,895
Percent of net assets	7%	7.20%	7%
Household Appliances
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 7,639	$ 7,808
Investment Owned, at Fair Value	$ 7,857	$ 8,168
Fair Value As A Percentage of Member's Equity	22.20%	23.60%
Household Appliances | Debt Investments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 6,702	$ 11,282
Investment Owned, at Fair Value	$ 5,402	$ 10,873
Percent of net assets	1.70%	3.40%	1.70%
Industrial Machinery & Supplies & Components
Schedule of Investments [Line Items]
Investment Owned, at Cost		$ 6,498
Investment Owned, at Fair Value		$ 6,561
Fair Value As A Percentage of Member's Equity		18.90%
Industrial Machinery & Supplies & Components | Debt Investments
Schedule of Investments [Line Items]
Investment Owned, at Cost		$ 5,536
Investment Owned, at Fair Value		$ 5,364
Percent of net assets		1.70%
Investment Banking & Brokerage
Schedule of Investments [Line Items]
Investment Owned, at Cost		$ 4,958
Investment Owned, at Fair Value		$ 4,977
Fair Value As A Percentage of Member's Equity		14.40%
Investment Banking & Brokerage | Debt Investments
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		Honors Holdings, LLC [Member]
Investment Owned, at Cost		$ 3,521
Investment Owned, at Fair Value		$ 3,522
Percent of net assets		1.10%
IT Consulting And Other Services
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 51,525	$ 50,974
Investment Owned, at Fair Value	$ 51,762	$ 51,295
Fair Value As A Percentage of Member's Equity	145.90%	147.90%
IT Consulting And Other Services | Debt Investments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 3,725	$ 3,741
Investment Owned, at Fair Value	$ 3,693	$ 3,745
Percent of net assets	1.20%	1.20%	1.20%
Leisure Products | Debt Investments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 17,865	$ 14,877
Investment Owned, at Fair Value	$ 15,502	$ 12,738
Percent of net assets	4.90%	4%	4.90%
Packaged Foods & Meats
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 11,180	$ 6,904
Investment Owned, at Fair Value	$ 11,202	$ 6,904
Fair Value As A Percentage of Member's Equity	31.60%	19.90%
Packaged Foods & Meats | Debt Investments
Schedule of Investments [Line Items]
Investment Owned, at Cost	$ 4,009
Investment Owned, at Fair Value	$ 4,009
Percent of net assets	1.30%		1.30%
Paper Packaging
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 6,876	$ 6,485
Investment Owned, at Fair Value	$ 6,621	$ 6,471
Fair Value As A Percentage of Member's Equity	18.70%	18.70%
Personal Products
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 5,810	$ 5,944
Investment Owned, at Fair Value	$ 5,843	$ 5,957
Fair Value As A Percentage of Member's Equity	16.50%	17.20%
Pharmaceuticals
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 16,468	$ 16,523
Investment Owned, at Fair Value	$ 15,965	$ 16,416
Fair Value As A Percentage of Member's Equity	45%	47.30%
Real Estate Operating Companies
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 6,908	$ 12,406
Investment Owned, at Fair Value	$ 6,743	$ 11,903
Fair Value As A Percentage of Member's Equity	19%	34.40%
Real Estate Operating Companies | Debt Investments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 5,880	$ 5,975
Investment Owned, at Fair Value	$ 6,088	$ 6,080
Percent of net assets	1.90%	1.90%	1.90%
Real Estate Services
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 7,153	$ 8,134
Investment Owned, at Fair Value	$ 6,430	$ 7,353
Fair Value As A Percentage of Member's Equity	18.20%	21.20%
Research & Consulting Services
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 11,962	$ 8,541
Investment Owned, at Fair Value	$ 12,044	$ 8,562
Fair Value As A Percentage of Member's Equity	34%	24.70%
Research & Consulting Services | Debt Investments
Schedule of Investments [Line Items]
Investment Owned, at Cost		$ 16,119
Investment Owned, at Fair Value		$ 16,081
Percent of net assets		5.10%
Systems Software | Debt Investments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 1,726	$ 20,618
Investment Owned, at Fair Value	$ 2,402	$ 11,523
Percent of net assets	0.80%	3.60%	0.80%
Technology Hardware, Storage & Peripherals
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 17,945	$ 18,811
Investment Owned, at Fair Value	$ 18,061	$ 18,853
Fair Value As A Percentage of Member's Equity	51%	54.40%
Technology Hardware, Storage & Peripherals | Debt Investments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 18,206	$ 16,808
Investment Owned, at Fair Value	$ 18,065	$ 16,745
Percent of net assets	5.70%	5.30%	5.70%
Distributors
Schedule of Investments [Line Items]
Investment Owned, at Cost	$ 4,122
Investment Owned, at Fair Value	$ 4,123
Fair Value As A Percentage of Member's Equity	11.60%
Distributors | Debt Investments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 11,768	$ 15,946
Investment Owned, at Fair Value	$ 11,845	$ 12,475
Percent of net assets	3.80%	3.90%	3.80%
Food Distributors
Schedule of Investments [Line Items]
Investment Owned, at Cost	$ 4,933
Investment Owned, at Fair Value	$ 4,934
Fair Value As A Percentage of Member's Equity	13.90%
Trading Companies & Distributors
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 8,223	$ 8,454
Investment Owned, at Fair Value	$ 8,284	$ 8,442
Fair Value As A Percentage of Member's Equity	23.40%	24.40%
Wireless Telecommunication Services
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 6,270	$ 6,294
Investment Owned, at Fair Value	$ 6,366	$ 6,295
Fair Value As A Percentage of Member's Equity	18%	18.20%
Health Care Supplies
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 7,492	$ 7,500
Investment Owned, at Fair Value	$ 7,626	$ 7,530
Fair Value As A Percentage of Member's Equity	21.40%	21.70%
Health Care Supplies | Debt Investments
Schedule of Investments [Line Items]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment Owned, at Cost	$ 20,099	$ 20,056
Investment Owned, at Fair Value	$ 18,768	$ 18,983
Percent of net assets	6%	6%	6%
Investment, Identifier [Axis]: ABB/Con-cise Optical Group LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ABBCon-ciseOpticalGroupLLCMember	whfcl:ABBCon-ciseOpticalGroupLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Health Care Supplies	Health Care Supplies	Health Care Supplies
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]
Investment, Interest Rate, Floor	0.75%	0.75%	0.75%
Investment, Basis Spread, Variable Rate	7.50%	7.50%	7.50%
Investment Interest Rate	12.99%	13.01%	12.99%
Investment, Acquisition Date	Feb. 23, 2022	Feb. 23, 2022
Investment Maturity Date	Feb. 23, 2028	Feb. 23, 2028	Feb. 23, 2028
Investment Owned, Balance, Principal Amount	$ 20,409	$ 20,409
Investment Owned, at Cost	20,099	20,056
Investment Owned, at Fair Value	$ 18,768	$ 18,983
Percent of net assets	6%	6%	6%
Investment, Identifier [Axis]: ALM Media, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:ALMMediaLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Research & Consulting Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6%
Investment Interest Rate		11.50%
Investment, Acquisition Date		Nov. 25, 2019
Investment Maturity Date		Nov. 25, 2024
Investment Owned, Balance, Principal Amount		$ 12,600
Investment Owned, at Cost		12,555
Investment Owned, at Fair Value		$ 12,517
Percent of net assets		4%
Investment, Identifier [Axis]: APG Lions Purchaser, LLC, First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ApgLionsPurchaserLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	11.08%		11.08%
Investment, Acquisition Date	Apr. 26, 2024
Investment Maturity Date	Apr. 16, 2030		Apr. 16, 2030
Investment, Identifier [Axis]: APG Lions Purchaser, LLC, First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ApgLionsPurchaserLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	11.08%		11.08%
Investment, Acquisition Date	Apr. 26, 2024
Investment Maturity Date	Apr. 16, 2030		Apr. 16, 2030
Investment Owned, Balance, Principal Amount	$ 69
Investment Owned, at Cost	68
Investment Owned, at Fair Value	$ 68
Fair Value As A Percentage of Member's Equity	0.20%
Investment, Identifier [Axis]: APG Lions Purchaser, LLC, First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ApgLionsPurchaserLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	11.08%		11.08%
Investment, Acquisition Date	Apr. 26, 2024
Investment Maturity Date	Apr. 16, 2030		Apr. 16, 2030
Investment Owned, Balance, Principal Amount	$ 4,114
Investment Owned, at Cost	4,054
Investment Owned, at Fair Value	$ 4,055
Fair Value As A Percentage of Member's Equity	11.40%
Investment, Identifier [Axis]: ATSG Inc First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ATSGIncMember	whfcl:ATSGIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	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
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.98%	12.04%	11.98%
Investment, Acquisition Date	Nov. 12, 2021	Nov. 12, 2021
Investment Maturity Date	Nov. 12, 2026	Nov. 12, 2026	Nov. 12, 2026
Investment Owned, Balance, Principal Amount	$ 3,761	$ 3,785
Investment Owned, at Cost	3,725	3,741
Investment Owned, at Fair Value	$ 3,693	$ 3,745
Percent of net assets	1.20%	1.20%	1.20%
Investment, Identifier [Axis]: ATSG, First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ATSGIncMember	whfcl:ATSGIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	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
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.98%	12.04%	11.98%
Investment, Acquisition Date	Mar. 27, 2023	Mar. 27, 2023
Investment Maturity Date	Nov. 12, 2026	Nov. 12, 2026	Nov. 12, 2026
Investment Owned, Balance, Shares | shares		9,873
Investment Owned, Balance, Principal Amount	$ 9,810
Investment Owned, at Cost	9,650	$ 9,678
Investment Owned, at Fair Value	$ 9,633	$ 9,771
Fair Value As A Percentage of Member's Equity	27.20%	28.20%
Investment, Identifier [Axis]: Alvaria Holdco (Cayman) (d/b/a Aspect Software, Inc.) First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:AlvariaHoldcoMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	0.75%		0.75%
Investment, Basis Spread, Variable Rate	7.50%		7.50%
Investment Interest Rate	12.96%		12.96%
Investment, Acquisition Date	Mar. 20, 2024
Investment Maturity Date	May 08, 2028		May 08, 2028
Investment Owned, Balance, Principal Amount	$ 1,722
Investment Owned, at Cost	1,531
Investment Owned, at Fair Value	$ 1,670
Investment, Interest Rate, Paid in Kind	6.50%		6.50%
Investment, Interest Rate, Paid in Cash	6.46%		6.46%
Percent of net assets	0.40%		0.40%
Investment, Identifier [Axis]: Alvaria Holdco (Cayman) (d/b/a Aspect Software, Inc.) First Lien Secured Term Loan Four
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:AlvariaHoldcoMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	0.75%		0.75%
Investment, Basis Spread, Variable Rate	7%		7%
Investment Interest Rate	12.46%		12.46%
Investment, Acquisition Date	Mar. 20, 2024
Investment Maturity Date	May 08, 2028		May 08, 2028
Investment Owned, Balance, Principal Amount	$ 2,400
Investment Owned, at Cost	2,357
Investment Owned, at Fair Value	$ 401
Percent of net assets	0.10%		0.10%
Investment, Identifier [Axis]: Alvaria Holdco (Cayman) (d/b/a Aspect Software, Inc.) First Lien Secured Term Loan Three
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:AlvariaHoldcoMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	0.75%		0.75%
Investment, Basis Spread, Variable Rate	7%		7%
Investment Interest Rate	12.46%		12.46%
Investment, Acquisition Date	Mar. 20, 2024
Investment Maturity Date	May 08, 2028		May 08, 2028
Investment Owned, Balance, Principal Amount	$ 9,600
Investment Owned, at Cost	9,428
Investment Owned, at Fair Value	$ 7,931
Percent of net assets	2.70%		2.70%
Investment, Identifier [Axis]: Alvaria Holdco (Cayman) (d/b/a Aspect Software, Inc.) First Lien Secured Term Loan Two
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:AlvariaHoldcoMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	0.75%		0.75%
Investment, Basis Spread, Variable Rate	7.50%		7.50%
Investment Interest Rate	12.96%		12.96%
Investment, Acquisition Date	Mar. 20, 2024
Investment Maturity Date	May 08, 2028		May 08, 2028
Investment Owned, Balance, Principal Amount	$ 1,145
Investment Owned, at Cost	1,017
Investment Owned, at Fair Value	$ 985
Investment, Interest Rate, Paid in Kind	5.50%		5.50%
Investment, Interest Rate, Paid in Cash	7.46%		7.46%
Percent of net assets	0.30%		0.30%
Investment, Identifier [Axis]: American Crafts Holdings, LLC, Warrants
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:AmericanCraftsHoldingsLlcMember	whfcl:AmericanCraftsHoldingsLlcMember
Investment, Type [Extensible Enumeration]	Warrant [Member]	Warrant [Member]	Warrant [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Office Services And Supplies [Member]	Office Services And Supplies [Member]	Office Services And Supplies [Member]
Investment, Acquisition Date	Dec. 22, 2022	Dec. 22, 2022
Investment Maturity Date	Dec. 22, 2032	Dec. 22, 2032	Dec. 22, 2032
Investment, Identifier [Axis]: American Crafts Lc Super Priority First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:AmericanCraftsLCMember	whfcl:AmericanCraftsLCMember
Investment, Type [Extensible Enumeration]	whfcl:SuperPriorityFirstLienSecuredTermLoanMember	whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember	whfcl:SuperPriorityFirstLienSecuredTermLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Office Services And Supplies [Member]		Office Services And Supplies [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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	8.50%		8.50%
Investment, Acquisition Date	Jul. 25, 2023
Investment Maturity Date	May 28, 2026		May 28, 2026
Investment Owned, Balance, Principal Amount	$ 2,043
Investment Owned, at Cost	2,043
Investment Owned, at Fair Value	$ 2,012	$ 1,878
Investment, Interest Rate, Paid in Kind	13.94%		13.94%
Percent of net assets	0.60%		0.60%
Investment, Identifier [Axis]: American Crafts, LC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:AmericanCraftsLCMember	whfcl:AmericanCraftsLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	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]
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	8.50%	8.50%	8.50%
Investment, Acquisition Date	Jan. 25, 2022	Jan. 25, 2022
Investment Maturity Date	May 28, 2026	May 28, 2026	May 28, 2026
Investment Owned, Balance, Principal Amount	$ 1,700	$ 1,585
Investment Owned, at Cost	1,458	1,458
Investment Owned, at Fair Value	$ 74	$ 93
Investment, Interest Rate, Paid in Kind	13.94%	13.96%	13.94%
Investment, Identifier [Axis]: American Crafts, LC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:AmericanCraftsLCMember	whfcl:AmericanCraftsLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	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]
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	8.50%	8.50%	8.50%
Investment, Acquisition Date	May 28, 2021	May 28, 2021
Investment Maturity Date	May 28, 2026	May 28, 2026	May 28, 2026
Investment Owned, Balance, Principal Amount	$ 10,125	$ 9,441
Investment Owned, at Cost	8,720	8,720
Investment Owned, at Fair Value	$ 442	$ 553
Investment, Interest Rate, Paid in Kind	13.94%	13.96%	13.94%
Percent of net assets	0.10%	0.20%	0.10%
Investment, Identifier [Axis]: American Crafts, LC Priority First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:AmericanCraftsLCMember	whfcl:AmericanCraftsLCMember
Investment, Type [Extensible Enumeration]	whfcl:PriorityFirstLienSecuredTermLoanMember	whfcl:PriorityFirstLienSecuredTermLoanMember	whfcl:PriorityFirstLienSecuredTermLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	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]
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	8.50%	8.50%	8.50%
Investment, Acquisition Date	Dec. 22, 2022	Dec. 22, 2022
Investment Maturity Date	May 28, 2026	May 28, 2026	May 28, 2026
Investment Owned, Balance, Principal Amount	$ 5,479	$ 5,105
Investment Owned, at Cost	5,105	5,105
Investment Owned, at Fair Value	$ 3,396	$ 3,226
Investment, Interest Rate, Paid in Kind	13.94%	13.96%	13.94%
Percent of net assets	1.10%	1%	1.10%
Investment, Identifier [Axis]: American Crafts, LC Super Senior Priority First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:AmericanCraftsLCMember	whfcl:AmericanCraftsLCMember
Investment, Type [Extensible Enumeration]	whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember	whfcl:SuperPriorityFirstLienSecuredTermLoanMember	whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	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]
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	8.50%	8.50%	8.50%
Investment, Acquisition Date	May 02, 2024	Jul. 25, 2023
Investment Maturity Date	May 28, 2026	May 28, 2026	May 28, 2026
Investment Owned, Balance, Principal Amount	$ 2,317	$ 1,903
Investment Owned, at Cost	2,317	1,903
Investment Owned, at Fair Value	$ 2,317	$ 1,878
Investment, Interest Rate, Paid in Kind	13.94%	13.96%	13.94%
Percent of net assets	0.70%	0.60%	0.70%
Investment, Identifier [Axis]: American Crafts, LC Super Senior Priority First Lien Secured Term Loan Due 01/31/24
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:AmericanCraftsLCMember
Investment, Type [Extensible Enumeration]	whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember		whfcl:SuperSeniorPriorityFirstLienSecuredTermLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Office Services And Supplies [Member]		Office Services And Supplies [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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	8.50%		8.50%
Investment, Acquisition Date	Jan. 31, 2024
Investment Maturity Date	May 28, 2026		May 28, 2026
Investment Owned, Balance, Principal Amount	$ 1,200
Investment Owned, at Cost	1,200
Investment Owned, at Fair Value	$ 1,200
Percent of net assets	0.40%		0.40%
Investment, Identifier [Axis]: American Crafts, LC Super Senior Priority First Lien Secured Term Loan one
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:AmericanCraftsLCMember
Investment, Type [Extensible Enumeration]	whfcl:SuperPriorityFirstLienSecuredTermLoanOneMember		whfcl:SuperPriorityFirstLienSecuredTermLoanOneMember
Investment Owned, at Fair Value	$ 1,200
Investment, Interest Rate, Paid in Kind	13.94%		13.94%
Investment, Identifier [Axis]: Arcole Holding Corporation, Equity
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:ArcoleHoldingCorporationMember
Investment, Type [Extensible Enumeration]		Equity Investments
Investment Owned, at Fair Value					$ 6,380
Investment, Identifier [Axis]: Arcserve Cayman GP LLC (d/b/a Arcserve (USA), LLC) Common Units One
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ArcserveCaymanGpLlcMember
Investment, Type [Extensible Enumeration]	whfcl:CommonUnitsMember		whfcl:CommonUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Systems Software		Systems Software
Investment, Acquisition Date	Jan. 03, 2024
Investment Owned, Balance, Principal Amount	$ 663
Investment, Identifier [Axis]: Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC) First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ArcserveCaymanOpcoLpMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Systems Software		Systems 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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	8%		8%
Investment Interest Rate	13.44%		13.44%
Investment, Acquisition Date	Jan. 03, 2024
Investment Maturity Date	Jan. 04, 2027		Jan. 04, 2027
Investment Owned, Balance, Principal Amount	$ 645
Investment Owned, at Cost	629
Investment Owned, at Fair Value	$ 1,279
Percent of net assets	0.40%		0.40%
Investment, Identifier [Axis]: Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC) Unsecured Loan One
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ArcserveCaymanOpcoLpMember
Investment, Type [Extensible Enumeration]	whfcl:UnsecuredLoanMember		whfcl:UnsecuredLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Systems Software		Systems Software
Investment, Basis Spread, Variable Rate	9%		9%
Investment Interest Rate	9%		9%
Investment, Acquisition Date	Jan. 03, 2024
Investment Maturity Date	Jul. 02, 2029		Jul. 02, 2029
Investment Owned, Balance, Principal Amount	$ 555
Investment Owned, at Cost	542
Investment Owned, at Fair Value	$ 555
Percent of net assets	0.20%		0.20%
Investment, Identifier [Axis]: Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC) Unsecured Loan Two
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ArcserveCaymanOpcoLpMember
Investment, Type [Extensible Enumeration]	whfcl:UnsecuredLoanMember		whfcl:UnsecuredLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Systems Software		Systems Software
Investment, Basis Spread, Variable Rate	9%		9%
Investment, Acquisition Date	Jan. 03, 2024
Investment Maturity Date	Jul. 02, 2029		Jul. 02, 2029
Investment Owned, Balance, Principal Amount	$ 568
Investment Owned, at Cost	555
Investment Owned, at Fair Value	$ 568
Investment, Interest Rate, Paid in Kind	9%		9%
Percent of net assets	0.20%		0.20%
Investment, Identifier [Axis]: Arcserve Cayman Topco LP (d/b/a Arcserve (USA), LLC) Common Units Two
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ArcserveCaymanTopcoLpMember
Investment, Type [Extensible Enumeration]	whfcl:CommonUnitsMember		whfcl:CommonUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Systems Software		Systems Software
Investment, Acquisition Date	Jan. 03, 2024
Investment Owned, Balance, Principal Amount	$ 663
Investment Owned, at Cost	19,568
Investment Owned, at Fair Value	$ 9,407
Percent of net assets	3%		3%
Investment, Identifier [Axis]: Arcstor Midco, LLC (d/b/a Arcserve (USA), LLC Priority First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:ArcstorMidcoLLCMember
Investment, Type [Extensible Enumeration]		whfcl:PriorityFirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Systems Software
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		8%
Investment, Acquisition Date		Jul. 14, 2023
Investment Maturity Date		Mar. 16, 2027
Investment Owned, Balance, Principal Amount		$ 1,078
Investment Owned, at Cost		1,050
Investment Owned, at Fair Value		$ 1,046
Investment, Interest Rate, Paid in Kind		13.46%
Percent of net assets		0.30%
Investment, Identifier [Axis]: Arcstor Midco, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:ArcstorMidcoLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Systems Software
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		7.75%
Investment, Acquisition Date		Mar. 16, 2021
Investment Maturity Date		Mar. 16, 2027
Investment Owned, Balance, Principal Amount		$ 21,613
Investment Owned, at Cost		19,568
Investment Owned, at Fair Value		$ 10,477
Investment, Interest Rate, Paid in Kind		13.21%
Percent of net assets		3.30%
Investment, Identifier [Axis]: Arteriocyte Medical Systems, Inc. First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ArteriocyteMedicalSystemsInc.Member	whfcl:ArteriocyteMedicalSystemsInc.Member
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Health Care Supplies	Health Care Supplies	Health Care Supplies
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6%	6.25%	6%
Investment Interest Rate	11.33%	11.60%	11.33%
Investment, Acquisition Date	Oct. 25, 2023	Oct. 25, 2023
Investment Maturity Date	Oct. 18, 2028	Oct. 18, 2028	Oct. 18, 2028
Investment Owned, at Fair Value	$ 8
Investment, Identifier [Axis]: Arteriocyte Medical Systems, Inc. First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ArteriocyteMedicalSystemsInc.Member	whfcl:ArteriocyteMedicalSystemsInc.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Health Care Supplies	Health Care Supplies	Health Care Supplies
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6%	6.25%	6%
Investment Interest Rate	11.33%	11.60%	11.33%
Investment, Acquisition Date	Oct. 25, 2023	Oct. 25, 2023
Investment Maturity Date	Oct. 18, 2028	Oct. 18, 2028	Oct. 18, 2028
Investment Owned, Balance, Shares | shares		5,022
Investment Owned, Balance, Principal Amount	$ 5,009
Investment Owned, at Cost	4,901	$ 4,901
Investment Owned, at Fair Value	$ 4,980	$ 4,901
Fair Value As A Percentage of Member's Equity	14%	14.10%
Investment, Identifier [Axis]: Atlas Purchaser, Inc First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:AtlasPurchaserIncMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Application Software
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		0.75%
Investment, Basis Spread, Variable Rate	7.50%	5.25%	7.50%
Investment Interest Rate		10.88%
Investment, Acquisition Date		Aug. 29, 2022
Investment Maturity Date		May 08, 2028
Investment Owned, Balance, Principal Amount		$ 3,066
Investment Owned, at Cost		2,675
Investment Owned, at Fair Value		$ 2,269
Percent of net assets		0.70%
Investment, Identifier [Axis]: Atlas Purchaser, Inc Second Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:AtlasPurchaserIncMember
Investment, Type [Extensible Enumeration]		whfcl:SecondLienSecuredTermLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Application Software
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		0.75%
Investment, Basis Spread, Variable Rate	7%	9%	7%
Investment Interest Rate		14.64%
Investment, Acquisition Date		May 03, 2021
Investment Maturity Date		May 07, 2029
Investment Owned, Balance, Principal Amount		$ 15,000
Investment Owned, at Cost		14,699
Investment Owned, at Fair Value		$ 9,744
Percent of net assets		3.10%
Investment, Identifier [Axis]: Avision Holdings, LLC (d/b/a Avision Sales Group) First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Avision Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising		Advertising
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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	11.19%		11.19%
Investment, Acquisition Date	May 31, 2024
Investment Maturity Date	Dec. 15, 2026		Dec. 15, 2026
Investment, Identifier [Axis]: Avision Holdings, LLC (d/b/a Avision Sales Group) First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Avision Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising		Advertising
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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	11.19%		11.19%
Investment, Acquisition Date	May 31, 2024
Investment Maturity Date	Dec. 15, 2026		Dec. 15, 2026
Investment Owned, Balance, Principal Amount	$ 662
Investment Owned, at Cost	649
Investment Owned, at Fair Value	$ 649
Percent of net assets	0.20%		0.20%
Investment, Identifier [Axis]: Avision Holdings, LLC Class A LLC Interests
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Avision Holdings, LLC [Member]	Avision Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:ClassALLCInterestsMember	whfcl:ClassALLCInterestsMember	whfcl:ClassALLCInterestsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising	Advertising	Advertising
Investment, Acquisition Date	Dec. 15, 2021	Dec. 15, 2021
Investment Owned, Balance, Principal Amount	$ 200	$ 200
Investment Owned, at Cost	287	287
Investment Owned, at Fair Value	$ 498	$ 411
Percent of net assets	0.20%	0.10%	0.20%
Investment, Identifier [Axis]: BBQ Buyer, LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:BBQBuyerLLCMember	whfcl:BBQBuyerLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Broadline Retail	Broadline Retail	Broadline Retail
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]
Investment, Interest Rate, Floor	1.50%	1.50%	1.50%
Investment, Basis Spread, Variable Rate	9.50%	9.50%	9.50%
Investment Interest Rate	14.94%	14.96%	14.94%
Investment, Acquisition Date	Dec. 02, 2021	Dec. 02, 2021
Investment Maturity Date	Aug. 28, 2025	Aug. 28, 2025	Aug. 28, 2025
Investment Owned, Balance, Principal Amount	$ 2,629	$ 2,628
Investment Owned, at Cost	2,613	2,606
Investment Owned, at Fair Value	$ 2,629	$ 2,613
Investment, Interest Rate, Paid in Kind	1%	1%	1%
Investment, Interest Rate, Paid in Cash	13.94%	13.96%	13.94%
Percent of net assets	0.80%	0.80%	0.80%
Investment, Identifier [Axis]: BBQ Buyer, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:BBQBuyerLLCMember	whfcl:BBQBuyerLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Broadline Retail	Broadline Retail	Broadline Retail
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]
Investment, Interest Rate, Floor	1.50%	1.50%	1.50%
Investment, Basis Spread, Variable Rate	9.50%	9.50%	9.50%
Investment Interest Rate	14.94%	14.96%	14.94%
Investment, Acquisition Date	Aug. 28, 2020	Aug. 28, 2020
Investment Maturity Date	Aug. 28, 2025	Aug. 28, 2025	Aug. 28, 2025
Investment Owned, Balance, Principal Amount	$ 12,892	$ 12,891
Investment Owned, at Cost	12,820	12,787
Investment Owned, at Fair Value	$ 12,892	$ 12,818
Investment, Interest Rate, Paid in Kind	1%	1%	1%
Investment, Interest Rate, Paid in Cash	13.94%	13.96%	13.94%
Percent of net assets	4.20%	4.10%	4.20%
Investment, Identifier [Axis]: BBQ Buyer, LLC Shares
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:BBQBuyerLLCMember	whfcl:BBQBuyerLLCMember
Investment, Type [Extensible Enumeration]	Common Stock [Member]	Common Stock [Member]	Common Stock [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Broadline Retail	Broadline Retail	Broadline 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	$ 1,119	$ 1,330
Percent of net assets	0.40%	0.40%	0.40%
Investment, Identifier [Axis]: BL Products Parent, LP Class A Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:BLProductsParentLPMember	whfcl:BLProductsParentLPMember
Investment, Type [Extensible Enumeration]	whfcl:ClassAUnitsMember	whfcl:ClassAUnitsMember	whfcl:ClassAUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Industrial Machinery & Supplies & Components	Industrial Machinery & Supplies & Components	Industrial Machinery & Supplies & Components
Investment, Acquisition Date	Feb. 01, 2022	Feb. 01, 2022
Investment Owned, Balance, Principal Amount	$ 733	$ 733
Investment Owned, at Cost	788	788
Investment Owned, at Fair Value	$ 1,253	$ 1,053
Percent of net assets	0.40%	0.30%	0.40%
Investment, Identifier [Axis]: BPII-JL Group Holdings LP Class A Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:BPII-JLGroupHoldingsLPMember	whfcl:BPII-JLGroupHoldingsLPMember
Investment, Type [Extensible Enumeration]	whfcl:ClassAUnitsMember	whfcl:ClassAUnitsMember	whfcl:ClassAUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Environmental & Facilities Services	Environmental & Facilities Services	Environmental & Facilities Services
Investment, Acquisition Date	Dec. 29, 2021	Dec. 29, 2021
Investment Owned, Balance, Principal Amount	$ 90	$ 83
Investment Owned, at Cost	942	825
Investment Owned, at Fair Value	$ 1,400	$ 983
Percent of net assets	0.40%	0.30%	0.40%
Investment, Identifier [Axis]: BUSA Acquisition Co. (d/b/a BankCard USA Merchant Services Inc.) First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Busa Acquisition Co BankCard Usa Merchant Services Inc [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Data Processing & Outsourced Services		Data Processing & Outsourced 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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.84%		11.84%
Investment, Acquisition Date	Apr. 04, 2024
Investment Maturity Date	Mar. 30, 2029		Mar. 30, 2029
Investment Owned, Balance, Principal Amount	$ 735
Investment Owned, at Cost	714
Investment Owned, at Fair Value	$ 717
Percent of net assets	0.20%		0.20%
Investment, Identifier [Axis]: BUSA Acquisition Co. (d/b/a BankCard USA Merchant Services Inc.) First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Busa Acquisition Co BankCard Usa Merchant Services Inc [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Data Processing & Outsourced Services		Data Processing & Outsourced 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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.81%		11.81%
Investment, Acquisition Date	Apr. 04, 2024
Investment Maturity Date	Mar. 30, 2029		Mar. 30, 2029
Investment Owned, Balance, Principal Amount	$ 7,981
Investment Owned, at Cost	7,753
Investment Owned, at Fair Value	$ 7,781
Percent of net assets	2.50%		2.50%
Investment, Identifier [Axis]: Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc) First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		Banner Acquisition Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Construction & Engineering
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6%
Investment Interest Rate		11.38%
Investment, Acquisition Date		Dec. 01, 2023
Investment Maturity Date		Jan. 02, 2029
Investment Owned, Balance, Principal Amount		$ 140
Investment Owned, at Cost		137
Investment Owned, at Fair Value		$ 137
Investment, Identifier [Axis]: Banner Acquisition Holdings, LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Banner Acquisition Holdings, LLC [Member]	Banner Acquisition Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.25%	6%	6.25%
Investment Interest Rate	11.58%	11.38%	11.58%
Investment, Acquisition Date	Dec. 21, 2023	Dec. 21, 2023
Investment Maturity Date	Jan. 02, 2029	Jan. 02, 2029	Jan. 02, 2029
Investment Owned, Balance, Shares | shares		1,400
Investment Owned, Balance, Principal Amount	$ 1,530
Investment Owned, at Cost	1,497	$ 1,366
Investment Owned, at Fair Value	$ 1,506	$ 1,365
Fair Value As A Percentage of Member's Equity	4.20%	3.80%
Investment, Identifier [Axis]: Banner Acquisition Holdings, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Banner Acquisition Holdings, LLC [Member]	Banner Acquisition Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.25%	6%	6.25%
Investment Interest Rate	11.58%	11.37%	11.58%
Investment, Acquisition Date	Dec. 21, 2023	Dec. 21, 2023
Investment Maturity Date	Jan. 02, 2029	Jan. 02, 2029	Jan. 02, 2029
Investment Owned, Balance, Shares | shares		196
Investment Owned, Balance, Principal Amount	$ 196
Investment Owned, at Cost	192	$ 191
Investment Owned, at Fair Value	$ 197	$ 191
Fair Value As A Percentage of Member's Equity	0.60%	0.60%
Investment, Identifier [Axis]: Banner Acquisition Holdings, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Banner Acquisition Holdings, LLC [Member]	Banner Acquisition Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.25%	6%	6.25%
Investment Interest Rate	11.58%	11.38%	11.58%
Investment, Acquisition Date	Dec. 21, 2023	Dec. 21, 2023
Investment Maturity Date	Jan. 02, 2029	Jan. 02, 2029	Jan. 02, 2029
Investment Owned, Balance, Shares | shares		3,091
Investment Owned, Balance, Principal Amount	$ 3,091
Investment Owned, at Cost	3,023	$ 3,015
Investment Owned, at Fair Value	$ 3,037	$ 3,015
Fair Value As A Percentage of Member's Equity	8.60%	8.70%
Investment, Identifier [Axis]: Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.) First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Barrett Purchaser LLC [Member]	Barrett Purchaser LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	0.75%	0.75%	0.75%
Investment, Basis Spread, Variable Rate	6%	6%	6%
Investment Interest Rate	11.34%	11.36%	11.34%
Investment, Acquisition Date	Jan. 10, 2024	Nov. 21, 2023
Investment Maturity Date	Nov. 21, 2029	Nov. 21, 2029	Nov. 21, 2029
Investment Owned, at Fair Value	$ (3)
Investment, Identifier [Axis]: Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.) First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Barrett Purchaser LLC [Member]	Barrett Purchaser LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	0.75%	0.75%	0.75%
Investment, Basis Spread, Variable Rate	5%	6%	5%
Investment Interest Rate	13.50%	11.36%	13.50%
Investment, Acquisition Date	Jan. 10, 2024	Nov. 21, 2023
Investment Maturity Date	Nov. 21, 2028	Nov. 21, 2028	Nov. 21, 2028
Investment Owned, Balance, Principal Amount	$ 75
Investment Owned, at Cost	73
Investment Owned, at Fair Value	$ 76
Fair Value As A Percentage of Member's Equity	0.20%
Investment, Identifier [Axis]: Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.) First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Barrett Purchaser LLC [Member]	Barrett Purchaser LLC [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	0.75%	0.75%	0.75%
Investment, Basis Spread, Variable Rate	6%	6%	6%
Investment Interest Rate	11.34%	11.36%	11.34%
Investment, Acquisition Date	Jan. 10, 2024	Nov. 21, 2023
Investment Maturity Date	Nov. 21, 2029	Nov. 21, 2029	Nov. 21, 2029
Investment Owned, Balance, Principal Amount	$ 3,635	$ 3,654
Investment Owned, at Cost	3,554	3,564
Investment Owned, at Fair Value	$ 3,584	$ 3,564
Fair Value As A Percentage of Member's Equity	10.10%
Percent of net assets		1.10%
Investment, Identifier [Axis]: Branford Filtration, LLC (d/b/a Clean Solutions Group) First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Branford Filtration, LLC [Member]	Branford Filtration, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.98%	11.96%	11.98%
Investment, Acquisition Date	Nov. 17, 2023	Nov. 17, 2023
Investment Maturity Date	Nov. 17, 2028	Nov. 17, 2028	Nov. 17, 2028
Investment Owned, at Fair Value	$ 8
Investment, Identifier [Axis]: Branford Filtration, LLC (d/b/a Clean Solutions Group) First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Branford Filtration, LLC [Member]	Branford Filtration, LLC [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.98%	11.96%	11.98%
Investment, Acquisition Date	Nov. 17, 2023	Nov. 17, 2023
Investment Maturity Date	Nov. 17, 2028	Nov. 17, 2028	Nov. 17, 2028
Investment Owned, Balance, Principal Amount	$ 11,555	$ 11,613
Investment Owned, at Cost	11,327	11,358
Investment Owned, at Fair Value	$ 11,613	$ 11,358
Percent of net assets	3.70%	3.60%	3.70%
Investment, Identifier [Axis]: Bridgepoint Healthcare, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:BridgepointHealthcareLLCMember	whfcl:BridgepointHealthcareLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Health Care Facilities [Member]	Health Care Facilities [Member]	Health Care Facilities [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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	8%	8%	8%
Investment Interest Rate	13.44%	13.46%	13.44%
Investment, Acquisition Date	Oct. 05, 2021	Oct. 05, 2021
Investment Maturity Date	Oct. 05, 2026	Oct. 05, 2026	Oct. 05, 2026
Investment Owned, Balance, Principal Amount	$ 238
Investment Owned, at Cost	236
Investment Owned, at Fair Value	$ 223	$ (1)
Percent of net assets	0.10%		0.10%
Investment, Identifier [Axis]: Bridgepoint Healthcare, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:BridgepointHealthcareLLCMember	whfcl:BridgepointHealthcareLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Health Care Facilities [Member]	Health Care Facilities [Member]	Health Care Facilities [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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	8%	8%	8%
Investment Interest Rate	13.44%	13.46%	13.44%
Investment, Acquisition Date	Oct. 05, 2021	Oct. 05, 2021
Investment Maturity Date	Oct. 05, 2026	Oct. 05, 2026	Oct. 05, 2026
Investment Owned, Balance, Principal Amount	$ 8,795	$ 9,073
Investment Owned, at Cost	8,715	8,973
Investment Owned, at Fair Value	$ 8,644	$ 8,967
Percent of net assets	2.80%	2.80%	2.80%
Investment, Identifier [Axis]: Buckeye Acquiror LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:BuckeyeAcquirorLlcMember	whfcl:BuckeyeAcquirorLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.94%	11.96%	11.94%
Investment, Acquisition Date	Aug. 09, 2023	Aug. 09, 2023
Investment Maturity Date	Aug. 01, 2029	Aug. 01, 2029	Aug. 01, 2029
Investment Owned, Balance, Principal Amount	$ 898
Investment Owned, at Cost	877
Investment Owned, at Fair Value	$ 902	$ (3)
Fair Value As A Percentage of Member's Equity	2.50%
Investment, Identifier [Axis]: Buckeye Acquiror LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:BuckeyeAcquirorLlcMember	whfcl:BuckeyeAcquirorLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.94%	11.96%	11.94%
Investment, Acquisition Date	Aug. 09, 2023	Aug. 09, 2023
Investment Maturity Date	Aug. 01, 2029	Aug. 01, 2029	Aug. 01, 2029
Investment Owned, Balance, Shares | shares		180
Investment Owned, Balance, Principal Amount	$ 271
Investment Owned, at Cost	265	$ 176
Investment Owned, at Fair Value	$ 283	$ 181
Fair Value As A Percentage of Member's Equity	0.80%	0.50%
Investment, Identifier [Axis]: Buckeye Acquiror LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:BuckeyeAcquirorLlcMember	whfcl:BuckeyeAcquirorLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.94%	11.96%	11.94%
Investment, Acquisition Date	Aug. 09, 2023	Aug. 09, 2023
Investment Maturity Date	Aug. 01, 2029	Aug. 01, 2029	Aug. 01, 2029
Investment Owned, Balance, Shares | shares		5,985
Investment Owned, Balance, Principal Amount	$ 6,167
Investment Owned, at Cost	6,035	$ 5,845
Investment Owned, at Fair Value	$ 6,192	$ 5,898
Fair Value As A Percentage of Member's Equity	17.50%	17%
Investment, Identifier [Axis]: Bulk Midco, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:BulkMidcoLLCMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Cable And Satellite [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		7.50%
Investment Interest Rate		12.96%
Investment, Acquisition Date		Oct. 28, 2022
Investment Maturity Date		Jun. 10, 2024
Investment Owned, Balance, Principal Amount		$ 2,000
Investment Owned, at Cost		1,989
Investment Owned, at Fair Value		$ 1,972
Investment, Interest Rate, Paid in Kind		1%
Investment, Interest Rate, Paid in Cash		11.96%
Percent of net assets		0.60%
Investment, Identifier [Axis]: Bulk Midco, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:BulkMidcoLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Cable And Satellite [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		7.50%
Investment Interest Rate		12.96%
Investment, Acquisition Date		Oct. 28, 2022
Investment Maturity Date		Jun. 10, 2024
Investment Owned, Balance, Principal Amount		$ 19,267
Investment Owned, at Cost		19,237
Investment Owned, at Fair Value		$ 18,997
Investment, Interest Rate, Paid in Kind		1%
Investment, Interest Rate, Paid in Cash		11.96%
Percent of net assets		6%
Investment, Identifier [Axis]: CX Holdco LLC Common Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:CXHoldcoLLCMember	whfcl:CXHoldcoLLCMember
Investment, Type [Extensible Enumeration]	whfcl:CommonUnitsMember	whfcl:CommonUnitsMember	whfcl:CommonUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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	$ 1,068
Investment Owned, at Cost	1,116	1,116
Investment Owned, at Fair Value	$ 1,261	$ 1,715
Percent of net assets	0.40%	0.50%	0.40%
Investment, Identifier [Axis]: Camp Facility Services Holdings, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:CampFacilityServicesHoldingsLLCMember	whfcl:CampFacilityServicesHoldingsLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Specialized Consumer Services [Member]	Specialized Consumer Services [Member]	Specialized Consumer 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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.94%	11.96%	11.94%
Investment, Acquisition Date	Nov. 16, 2021	Nov. 16, 2021
Investment Maturity Date	Nov. 16, 2027	Nov. 16, 2027	Nov. 16, 2027
Investment Owned, Balance, Principal Amount	$ 10,993	$ 11,668
Investment Owned, at Cost	10,869	11,517
Investment Owned, at Fair Value	$ 10,899	$ 11,496
Percent of net assets	3.50%	3.60%	3.50%
Investment, Identifier [Axis]: Camp Facility Services Parent, LLC Preferred Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:CampFacilityServicesParentLLCMember	whfcl:CampFacilityServicesParentLLCMember
Investment, Type [Extensible Enumeration]	Preferred Units [Member]	Preferred Units [Member]	Preferred Units [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Specialized Consumer Services [Member]	Specialized Consumer Services [Member]	Specialized Consumer Services [Member]
Investment, Basis Spread, Variable Rate	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	$ 1,088	$ 1,023
Investment, Interest Rate, Paid in Kind	10%	10%	10%
Percent of net assets	0.30%	0.30%	0.30%
Investment, Identifier [Axis]: Cennox Holdings Limited, First lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.25%, Rate 11.56%, Due 5/4/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:CennoxHoldingsLimitedMember	whfcl:CennoxHoldingsLimitedMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	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
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Base Rate [Member]	whfcl:SolarHoldingsBidcoLimitedFirstLienSecuredTermLoanSoniaMember	Base Rate [Member]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6%	6.25%	6%
Investment Interest Rate	13.13%	11.56%	13.13%
Investment, Acquisition Date	Jul. 16, 2021	Jul. 16, 2021
Investment Maturity Date	May 04, 2026	May 04, 2026	May 04, 2026
Investment Owned, Balance, Shares | shares		864
Investment Owned, Balance, Principal Amount	$ 351
Investment Owned, at Cost	538	$ 1,182
Investment Owned, at Fair Value	$ 442	$ 1,082
Investment, Interest Rate, Paid in Kind		0.25%
Fair Value As A Percentage of Member's Equity	1.20%	3.10%
Investment, Identifier [Axis]: Cennox Holdings Limited., First lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 11.59%, Due 5/4/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:CennoxHoldingsLimitedMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		IT Consulting And Other Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]		whfcl:SolarHoldingsBidcoLimitedFirstLienSecuredTermLoanSoniaMember
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6.25%
Investment Interest Rate		11.59%
Investment, Acquisition Date		Jul. 16, 2021
Investment Maturity Date		May 04, 2026
Investment Owned, Balance, Shares | shares		2,825
Investment Owned, at Cost		$ 3,863
Investment Owned, at Fair Value		$ 3,538
Investment, Interest Rate, Paid in Kind		0.25%
Investment, Interest Rate, Paid in Cash		11.34%
Fair Value As A Percentage of Member's Equity		10.20%
Investment, Identifier [Axis]: Cennox Holdings Limited., First lien Secured Term Loan, Floor 1.00%, Spread L plus 6.25%, Rate 11.68%, Due 5/4/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:CennoxHoldingsLimitedMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	IT Consulting And Other Services		IT Consulting And Other Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Sterling Overnight Index Average [Member]		Sterling Overnight Index Average [Member]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6%		6%
Investment Interest Rate	11.61%		11.61%
Investment, Acquisition Date	Jul. 16, 2021
Investment Maturity Date	May 04, 2026		May 04, 2026
Investment Owned, Balance, Principal Amount	$ 2,814
Investment Owned, at Cost	3,855
Investment Owned, at Fair Value	$ 3,533
Fair Value As A Percentage of Member's Equity	10%
Investment, Identifier [Axis]: Cennox, Inc, First lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 10.40%, Due 5/4/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:CennoxHoldingsLimitedMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	IT Consulting And Other Services		IT Consulting And Other Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:EuroInterbankOfferedRateMember		whfcl:EuroInterbankOfferedRateMember
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	9.96%		9.96%
Investment, Acquisition Date	Jun. 28, 2022
Investment Maturity Date	May 04, 2026		May 04, 2026
Investment Owned, Balance, Principal Amount	$ 9,385
Investment Owned, at Cost	9,837
Investment Owned, at Fair Value	$ 10,052
Fair Value As A Percentage of Member's Equity	28.30%
Investment, Identifier [Axis]: Cennox, Inc, First lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 10.44%, Due 5/4/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:CennoxInc.Member
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		IT Consulting And Other Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]		whfcl:EuroInterbankOfferedRateMember
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6.50%
Investment Interest Rate		10.44%
Investment, Acquisition Date		Jun. 28, 2022
Investment Maturity Date		May 04, 2026
Investment Owned, Balance, Shares | shares		9,422
Investment Owned, at Cost		$ 9,851
Investment Owned, at Fair Value		$ 10,257
Investment, Interest Rate, Paid in Kind		0.25%
Fair Value As A Percentage of Member's Equity		29.60%
Investment, Identifier [Axis]: Chase Products Co. (f/k/a Starco) First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ChaseProductsCoMember	whfcl:ChaseProductsCoMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Diversified Chemicals [Member]
Investment, Basis Spread, Variable Rate		12%
Investment, Acquisition Date		Mar. 16, 2023
Investment Maturity Date		Mar. 16, 2028
Investment Owned, Balance, Principal Amount		$ 2,962
Investment Owned, at Cost		2,962
Investment Owned, at Fair Value	$ 2,958	$ 2,793
Investment, Interest Rate, Paid in Kind	12%	12%	12%
Percent of net assets		0.90%
Investment, Identifier [Axis]: Chase Products Co. (f/k/a Starco) First Lien Secured Term Loan 12.00 PIK
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ChaseProductsCoMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Chemicals [Member]		Diversified Chemicals [Member]
Investment, Basis Spread, Variable Rate	12%		12%
Investment, Acquisition Date	Mar. 16, 2023
Investment Maturity Date	Mar. 16, 2028		Mar. 16, 2028
Investment Owned, Balance, Principal Amount	$ 3,144
Investment Owned, at Cost	3,144
Investment Owned, at Fair Value	$ 2,958
Percent of net assets	0.90%		0.90%
Investment, Identifier [Axis]: Claridge Products and Equipment, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ClaridgeProductsandEquipmentLLCMember	whfcl:ClaridgeProductsandEquipmentLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Construction Materials [Member]	Construction Materials [Member]	Construction Materials [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Base Rate [Member]	Base Rate [Member]	Base Rate [Member]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	8.31%	7.56%	8.31%
Investment Interest Rate	15.10%	14.41%	15.10%
Investment, Acquisition Date	Dec. 30, 2020	Dec. 30, 2020
Investment Maturity Date	Dec. 30, 2025	Dec. 30, 2025	Dec. 30, 2025
Investment Owned, Balance, Principal Amount	$ 632	$ 632
Investment Owned, at Cost	629	628
Investment Owned, at Fair Value	$ 548	$ 496
Investment, Interest Rate, Paid in Kind	2.25%	1.50%	2.25%
Investment, Interest Rate, Paid in Cash	12.85%	12.91%	12.85%
Percent of net assets	0.20%	0.20%	0.20%
Investment, Identifier [Axis]: Claridge Products and Equipment, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ClaridgeProductsandEquipmentLLCMember	whfcl:ClaridgeProductsandEquipmentLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Construction Materials [Member]	Construction Materials [Member]	Construction Materials [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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	8.75%	8%	8.75%
Investment Interest Rate	14.19%	13.50%	14.19%
Investment, Acquisition Date	Dec. 30, 2020	Dec. 30, 2020
Investment Maturity Date	Dec. 30, 2025	Dec. 30, 2025	Dec. 30, 2025
Investment Owned, Balance, Principal Amount	$ 6,542	$ 7,452
Investment Owned, at Cost	6,506	7,395
Investment Owned, at Fair Value	$ 5,758	$ 6,405
Investment, Interest Rate, Paid in Kind	2.25%	1.50%	2.25%
Investment, Interest Rate, Paid in Cash	11.94%	12%	11.94%
Percent of net assets	1.80%	2%	1.80%
Investment, Identifier [Axis]: Clark Restaurant Service, LLC, First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ClarkRestaurantServiceLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Food Distributors		Food 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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	11.08%		11.08%
Investment, Acquisition Date	Jun. 14, 2024
Investment Maturity Date	May 10, 2029		May 10, 2029
Investment, Identifier [Axis]: Clark Restaurant Service, LLC, First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ClarkRestaurantServiceLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Food Distributors		Food 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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	11.08%		11.08%
Investment, Acquisition Date	Jun. 14, 2024
Investment Maturity Date	May 10, 2029		May 10, 2029
Investment Owned, Balance, Principal Amount	$ 5,031
Investment Owned, at Cost	4,933
Investment Owned, at Fair Value	$ 4,934
Fair Value As A Percentage of Member's Equity	13.90%
Investment, Identifier [Axis]: CleanChoice Energy, Inc First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:CleanChoiceEnergyIncMember	whfcl:CleanChoiceEnergyIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Electric Utilities [Member]	Electric Utilities [Member]	Electric Utilities [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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7.59%	7.58%	7.59%
Investment Interest Rate	13.06%	13.14%	13.06%
Investment, Acquisition Date	Oct. 12, 2021	Oct. 12, 2021
Investment Maturity Date	Oct. 12, 2026	Oct. 12, 2026	Oct. 12, 2026
Investment Owned, Balance, Principal Amount	$ 15,955	$ 15,955
Investment Owned, at Cost	15,759	15,715
Investment Owned, at Fair Value	$ 16,083	$ 15,954
Percent of net assets	5.10%	5%	5.10%
Investment, Identifier [Axis]: Coastal Television Broadcasting Group LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:CoastalTelevisionBroadcastingGroupLLCMember	whfcl:CoastalTelevisionBroadcastingGroupLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7%	7%	7%
Investment Interest Rate	12.44%	12.46%	12.44%
Investment, Acquisition Date	Dec. 30, 2021	Dec. 30, 2021
Investment Maturity Date	Dec. 30, 2026	Dec. 30, 2026	Dec. 30, 2026
Investment Owned, at Fair Value	$ (1)	$ (3)
Investment, Identifier [Axis]: Coastal Television Broadcasting Group LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:CoastalTelevisionBroadcastingGroupLLCMember	whfcl:CoastalTelevisionBroadcastingGroupLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7%	7%	7%
Investment Interest Rate	12.44%	12.46%	12.44%
Investment, Acquisition Date	Dec. 30, 2021	Dec. 30, 2021
Investment Maturity Date	Dec. 30, 2026	Dec. 30, 2026	Dec. 30, 2026
Investment Owned, Balance, Principal Amount	$ 8,444	$ 7,418
Investment Owned, at Cost	8,348	7,329
Investment Owned, at Fair Value	$ 8,339	$ 7,246
Percent of net assets	2.70%	2.30%	2.70%
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]		whfcl:DrewFoamCompaniesIncMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Building Products
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		7.25%
Investment Interest Rate		12.75%
Investment, Acquisition Date		Nov. 09, 2020
Investment Maturity Date		Nov. 05, 2025
Investment Owned, Balance, Shares | shares		13,644
Investment Owned, at Cost		$ 13,541
Investment Owned, at Fair Value		$ 13,313
Fair Value As A Percentage of Member's Equity		38.40%
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]	whfcl:DrewFoamCompaniesIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6%		6%
Investment Interest Rate	12.73%		12.73%
Investment, Acquisition Date	Nov. 09, 2020
Investment Maturity Date	Nov. 05, 2025		Nov. 05, 2025
Investment Owned, Balance, Principal Amount	$ 13,573
Investment Owned, at Cost	13,498
Investment Owned, at Fair Value	$ 13,449
Fair Value As A Percentage of Member's Equity	37.90%
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]	whfcl:E-PhoenixAcquisitionCo.Inc.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.98%		10.98%
Investment, Acquisition Date	Jul. 15, 2021
Investment Maturity Date	Jun. 23, 2027		Jun. 23, 2027
Investment Owned, Balance, Principal Amount	$ 8,387
Investment Owned, at Cost	8,335
Investment Owned, at Fair Value	$ 8,387
Fair Value As A Percentage of Member's Equity	23.70%
Investment, Identifier [Axis]: E-Phoenix Acquisition Co. Inc., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 5.50%, Rate11.00%, Due 6/23/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:E-PhoenixAcquisitionCo.Inc.Member
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		5.50%
Investment Interest Rate		11%
Investment, Acquisition Date		Jul. 15, 2021
Investment Maturity Date		Jun. 23, 2027
Investment Owned, Balance, Shares | shares		8,604
Investment Owned, at Cost		$ 8,541
Investment Owned, at Fair Value		$ 8,562
Fair Value As A Percentage of Member's Equity		24.70%
Investment, Identifier [Axis]: Eddy Acquisitions, LLC Preferred Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:EddyAcquisitionsLLCMember	whfcl:EddyAcquisitionsLLCMember
Investment, Type [Extensible Enumeration]	Preferred Units [Member]	Preferred Units [Member]	Preferred Units [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Education Services [Member]	Education Services [Member]	Education Services [Member]
Investment, Basis Spread, Variable Rate	12%	12%	12%
Investment Interest Rate	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	$ 1	$ 18
Investment, Identifier [Axis]: EducationDynamics, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:EducationDynamicsLLCMember	whfcl:EducationDynamicsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Education Services [Member]	Education Services [Member]	Education 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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7%	7%	7%
Investment Interest Rate	12.44%	12.46%	12.44%
Investment, Acquisition Date	Sep. 15, 2021	Sep. 15, 2021
Investment Maturity Date	Sep. 15, 2026	Sep. 15, 2026	Sep. 15, 2026
Investment Owned, at Fair Value	$ (56)	$ (22)
Investment, Interest Rate, Paid in Kind	0.50%	0.50%	0.50%
Investment, Interest Rate, Paid in Cash	11.94%	11.96%	11.94%
Investment, Identifier [Axis]: EducationDynamics, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:EducationDynamicsLLCMember	whfcl:EducationDynamicsLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Education Services [Member]	Education Services [Member]	Education 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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7%	7%	7%
Investment Interest Rate	12.44%	12.46%	12.44%
Investment, Acquisition Date	Sep. 15, 2021	Sep. 15, 2021
Investment Maturity Date	Sep. 15, 2026	Sep. 15, 2026	Sep. 15, 2026
Investment Owned, Balance, Principal Amount	$ 12,494	$ 12,784
Investment Owned, at Cost	12,385	12,647
Investment Owned, at Fair Value	$ 11,803	$ 12,407
Investment, Interest Rate, Paid in Kind	0.50%	0.50%	0.50%
Investment, Interest Rate, Paid in Cash	11.94%	11.96%	11.94%
Percent of net assets	3.80%	4%	3.80%
Investment, Identifier [Axis]: EducationDynamics, LLC Subordinated Unsecured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:EducationDynamicsLLCMember	whfcl:EducationDynamicsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:SubordinatedUnsecuredTermLoanMember	whfcl:SubordinatedUnsecuredTermLoanMember	whfcl:SubordinatedUnsecuredTermLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Education Services [Member]	Education Services [Member]	Education Services [Member]
Investment, Basis Spread, Variable Rate	4%	4%	4%
Investment Interest Rate	4%	4%	4%
Investment, Acquisition Date	Sep. 15, 2021	Sep. 15, 2021
Investment Maturity Date	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	$ 138	$ 167
Percent of net assets		0.10%
Investment, Identifier [Axis]: Empire Office, Inc First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:EmpireOfficeIncMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Office Services And Supplies [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1.50%
Investment, Basis Spread, Variable Rate		6.75%
Investment Interest Rate		12.21%
Investment, Acquisition Date		Aug. 17, 2021
Investment Maturity Date		Apr. 12, 2024
Investment Owned, Balance, Principal Amount		$ 4,556
Investment Owned, at Cost		4,545
Investment Owned, at Fair Value		$ 4,556
Percent of net assets		1.40%
Investment, Identifier [Axis]: Empire Office, Inc First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:EmpireOfficeIncMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Office Services And Supplies [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1.50%
Investment, Basis Spread, Variable Rate		6.75%
Investment Interest Rate		12.21%
Investment, Acquisition Date		Apr. 12, 2019
Investment Maturity Date		Apr. 12, 2024
Investment Owned, Balance, Principal Amount		$ 10,947
Investment Owned, at Cost		10,931
Investment Owned, at Fair Value		$ 10,947
Percent of net assets		3.50%
Investment, Identifier [Axis]: Event Services America, Inc. (d/b/a Contemporary Services Corporation) First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:EventServicesAmericaIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Security & Alarm Services [Member]		Security & Alarm 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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	12.09%		12.09%
Investment, Acquisition Date	Jan. 31, 2024
Investment Maturity Date	Jan. 31, 2029		Jan. 31, 2029
Investment Owned, Balance, Principal Amount	$ 7,000
Investment Owned, at Cost	6,840
Investment Owned, at Fair Value	$ 6,930
Percent of net assets	2.20%		2.20%
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]	whfcl:FgiAcquisitionCorpMember	whfcl:FgiAcquisitionCorpMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.98%	12%	11.98%
Investment, Acquisition Date	Oct. 28, 2019	Oct. 28, 2019
Investment Maturity Date	Oct. 29, 2026	Oct. 29, 2026	Oct. 29, 2026
Investment Owned, Balance, Principal Amount	$ 16,110	$ 16,193
Investment Owned, at Cost	15,775	15,786
Investment Owned, at Fair Value	$ 16,110	$ 16,110
Percent of net assets	5.30%	5.10%	5.30%
Investment, Identifier [Axis]: Foodservices Brand Group, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:FoodservicesBrandGroupLlcMember	whfcl:FoodservicesBrandGroupLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	8%	8%	8%
Investment Interest Rate	13.49%	13.52%	13.49%
Investment, Acquisition Date	Nov. 22, 2022	Nov. 22, 2022
Investment Maturity Date	Dec. 09, 2025	Dec. 09, 2025	Dec. 09, 2025
Investment Owned, Balance, Principal Amount	$ 357	$ 357
Investment Owned, at Cost	357	357
Investment Owned, at Fair Value	$ 228	$ 200
Percent of net assets	0.10%	0.10%	0.10%
Investment, Identifier [Axis]: Foodservices Brand Group, LLC Second Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:FoodservicesBrandGroupLlcMember
Investment, Type [Extensible Enumeration]		whfcl:SecondLienSecuredTermLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Distributors
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1.50%
Investment, Basis Spread, Variable Rate		6.50%
Investment Interest Rate		11.96%
Investment, Acquisition Date		Nov. 22, 2022
Investment Maturity Date		Jan. 08, 2026
Investment Owned, Balance, Principal Amount		$ 5,171
Investment Owned, at Cost		4,915
Investment Owned, at Fair Value		$ 1,601
Percent of net assets		0.50%
Investment, Identifier [Axis]: Forward Solutions, LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ForwardSolutionsLlcMember	whfcl:ForwardSolutionsLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising	Advertising	Advertising
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	5.75%	6.75%	5.75%
Investment Interest Rate	11.98%	12.25%	11.98%
Investment, Acquisition Date	Mar. 11, 2022	Mar. 11, 2022
Investment Maturity Date	Dec. 15, 2026	Dec. 15, 2026	Dec. 15, 2026
Investment Owned, Balance, Shares | shares		3,054
Investment Owned, Balance, Principal Amount	$ 3,039
Investment Owned, at Cost	3,009	$ 3,018
Investment Owned, at Fair Value	$ 3,039	$ 3,025
Fair Value As A Percentage of Member's Equity	8.60%	8.70%
Investment, Identifier [Axis]: Forward Solutions, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ForwardSolutionsLlcMember	whfcl:ForwardSolutionsLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising	Advertising	Advertising
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	5.75%	6.75%	5.75%
Investment Interest Rate	11.98%	12.25%	11.98%
Investment, Acquisition Date	Feb. 18, 2022	Feb. 18, 2022
Investment Maturity Date	Dec. 15, 2026	Dec. 15, 2026	Dec. 15, 2026
Investment Owned, at Fair Value	$ 6	$ 1
Investment, Identifier [Axis]: Forward Solutions, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ForwardSolutionsLlcMember	whfcl:ForwardSolutionsLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising	Advertising	Advertising
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	5.75%	6.75%	5.75%
Investment Interest Rate	11.98%	12.25%	11.98%
Investment, Acquisition Date	Feb. 18, 2022	Feb. 18, 2022
Investment Maturity Date	Dec. 15, 2026	Dec. 15, 2026	Dec. 15, 2026
Investment Owned, Balance, Shares | shares		9,100
Investment Owned, Balance, Principal Amount	$ 9,054
Investment Owned, at Cost	8,965	$ 8,991
Investment Owned, at Fair Value	$ 9,054	$ 9,014
Fair Value As A Percentage of Member's Equity	25.50%	26%
Investment, Identifier [Axis]: Future Payment Technologies, LP First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:FuturePaymentTechnologiesLPMember	whfcl:FuturePaymentTechnologiesLPMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Data Processing & Outsourced Services	Data Processing & Outsourced Services	Data Processing & Outsourced 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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	8.25%	8.25%	8.25%
Investment Interest Rate	13.68%	13.69%	13.68%
Investment, Acquisition Date	Dec. 23, 2016	Dec. 23, 2016
Investment Maturity Date	Dec. 05, 2025	Dec. 05, 2025	Dec. 05, 2025
Investment Owned, Balance, Principal Amount	$ 21,043	$ 21,665
Investment Owned, at Cost	20,982	21,582
Investment Owned, at Fair Value	$ 21,043	$ 21,480
Percent of net assets	6.70%	6.80%	6.70%
Investment, Identifier [Axis]: Geo Logic Systems Ltd First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:GeoLogicSystemsLtdMember	whfcl:GeoLogicSystemsLtdMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Data Processing & Outsourced Services	Data Processing & Outsourced Services	Data Processing & Outsourced Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:CanadianOvernightRepoRateAverageMember	whfcl:CanadianDollarOfferedRateMember	whfcl:CanadianOvernightRepoRateAverageMember
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.47%	11.94%	11.47%
Investment, Acquisition Date	Jan. 22, 2020	Jan. 22, 2020
Investment Maturity Date	Dec. 19, 2024	Dec. 19, 2024	Dec. 19, 2024
Investment Owned, at Fair Value	$ 3	$ 5
Investment, Identifier [Axis]: Geo Logic Systems Ltd First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:GeoLogicSystemsLtdMember	whfcl:GeoLogicSystemsLtdMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Data Processing & Outsourced Services	Data Processing & Outsourced Services	Data Processing & Outsourced Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:CanadianOvernightRepoRateAverageMember	whfcl:CanadianDollarOfferedRateMember	whfcl:CanadianOvernightRepoRateAverageMember
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.47%	11.94%	11.47%
Investment, Acquisition Date	Jan. 22, 2020	Jan. 22, 2020
Investment Maturity Date	Dec. 19, 2024	Dec. 19, 2024	Dec. 19, 2024
Investment Owned, Balance, Shares | shares		19,416
Investment Owned, Balance, Principal Amount	$ 18,686
Investment Owned, at Cost	14,431	$ 14,969
Investment Owned, at Fair Value	$ 13,653	$ 14,654
Fair Value As A Percentage of Member's Equity	38.50%	42.30%
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]	whfcl:GulfWindsInternationalAcquisitionLlcMember	whfcl:GulfWindsInternationalAcquisitionLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7.50%	7%	7.50%
Investment Interest Rate	12.94%	12.46%	12.94%
Investment, Acquisition Date	Dec. 16, 2022	Dec. 16, 2022
Investment Maturity Date	Dec. 18, 2028	Dec. 18, 2028	Dec. 18, 2028
Investment Owned, Balance, Principal Amount	$ 162
Investment Owned, at Cost	158
Investment Owned, at Fair Value	$ 173	$ 7
Percent of net assets	0.10%		0.10%
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]	whfcl:GulfWindsInternationalAcquisitionLlcMember	whfcl:GulfWindsInternationalAcquisitionLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7.50%	7%	7.50%
Investment Interest Rate	12.94%	12.46%	12.94%
Investment, Acquisition Date	Dec. 16, 2022	Dec. 16, 2022
Investment Maturity Date	Dec. 18, 2028	Dec. 18, 2028	Dec. 18, 2028
Investment Owned, Balance, Principal Amount	$ 9,039	$ 4,804
Investment Owned, at Cost	8,832	4,685
Investment Owned, at Fair Value	$ 9,039	$ 4,738
Percent of net assets	2.90%	1.50%	2.90%
Investment, Identifier [Axis]: HC Salon Holdings, Inc First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:HCSalonHoldingsIncMember	whfcl:HCSalonHoldingsIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Specialized Consumer Services [Member]	Specialized Consumer Services [Member]	Specialized Consumer 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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7%	6.50%	7%
Investment Interest Rate	12.60%	12.11%	12.60%
Investment, Acquisition Date	Sep. 30, 2021	Sep. 30, 2021
Investment Maturity Date	Sep. 30, 2026	Sep. 30, 2026	Sep. 30, 2026
Investment Owned, at Fair Value	$ 6	$ 8
Investment, Identifier [Axis]: HC Salon Holdings, Inc First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:HCSalonHoldingsIncMember	whfcl:HCSalonHoldingsIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Specialized Consumer Services [Member]	Specialized Consumer Services [Member]	Specialized Consumer 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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7%	6.50%	7%
Investment Interest Rate	12.60%	12.11%	12.60%
Investment, Acquisition Date	Sep. 30, 2021	Sep. 30, 2021
Investment Maturity Date	Sep. 30, 2026	Sep. 30, 2026	Sep. 30, 2026
Investment Owned, Balance, Principal Amount	$ 11,346	$ 11,404
Investment Owned, at Cost	11,244	11,279
Investment Owned, at Fair Value	$ 11,346	$ 11,404
Percent of net assets	3.60%	3.60%	3.60%
Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread Base Plus, 6.22%, Rate 12.10%, Due 10/19/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:HrgManagementLlcHomeriverGroupLlcMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Operating Companies
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Base Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6.22%
Investment Interest Rate		12.10%
Investment, Acquisition Date		Feb. 18, 2022
Investment Maturity Date		Oct. 19, 2026
Investment Owned, Balance, Shares | shares		2,398
Investment Owned, at Cost		$ 2,369
Investment Owned, at Fair Value		$ 2,282
Fair Value As A Percentage of Member's Equity		6.60%
Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L Plus, 6.22%, Rate 12.03%, Due 10/19/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:HrgManagementLlcHomeriverGroupLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Real Estate Operating Companies		Real Estate Operating Companies
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Base Rate [Member]		Base Rate [Member]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment, Acquisition Date	Feb. 18, 2022
Investment Maturity Date	Oct. 19, 2026		Oct. 19, 2026
Investment Owned, Balance, Principal Amount	$ 1,398
Investment Owned, at Cost	1,385
Investment Owned, at Fair Value	$ 1,359
Fair Value As A Percentage of Member's Equity	3.80%
Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate 11.72%, Due 10/19/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:HrgManagementLlcHomeriverGroupLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment, Acquisition Date	Feb. 18, 2022
Investment Maturity Date	Oct. 19, 2026		Oct. 19, 2026
Investment Owned, at Fair Value	$ (23)
Fair Value As A Percentage of Member's Equity	(0.10%)
Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread Plus, 6.25%, Rate 11.80%, Due 10/19/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:HrgManagementLlcHomeriverGroupLlcMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Operating Companies
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6.25%
Investment Interest Rate		11.80%
Investment, Acquisition Date		Feb. 18, 2022
Investment Maturity Date		Oct. 19, 2026
Investment Owned, Balance, Shares | shares		596
Investment Owned, at Cost		$ 589
Investment Owned, at Fair Value		$ 547
Fair Value As A Percentage of Member's Equity		1.60%
Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate 11.72%, Due 10/19/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:HrgManagementLlcHomeriverGroupLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment, Acquisition Date	Dec. 28, 2021
Investment Maturity Date	Oct. 19, 2026		Oct. 19, 2026
Investment Owned, Balance, Principal Amount	$ 5,574
Investment Owned, at Cost	5,523
Investment Owned, at Fair Value	$ 5,407
Fair Value As A Percentage of Member's Equity	15.30%
Investment, Identifier [Axis]: HRG Management, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus, 6.25%, Rate 11.80%, Due 10/19/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:HrgManagementLlcHomeriverGroupLlcMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Operating Companies
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6.25%
Investment Interest Rate		11.80%
Investment, Acquisition Date		Dec. 28, 2021
Investment Maturity Date		Oct. 19, 2026
Investment Owned, Balance, Shares | shares		9,555
Investment Owned, at Cost		$ 9,448
Investment Owned, at Fair Value		$ 9,074
Fair Value As A Percentage of Member's Equity		26.20%
Investment, Identifier [Axis]: Hollander Intermediate LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:HollanderIntermediateLlcMember	whfcl:HollanderIntermediateLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	3%	3%	3%
Investment, Basis Spread, Variable Rate	8.75%	10.75%	8.75%
Investment Interest Rate	14.21%	16.22%	14.21%
Investment, Acquisition Date	Sep. 19, 2022	Sep. 19, 2022
Investment Maturity Date	Sep. 21, 2026	Sep. 21, 2026	Sep. 21, 2026
Investment Owned, Balance, Principal Amount	$ 4,687	$ 4,689
Investment Owned, at Cost	4,664	4,661
Investment Owned, at Fair Value	$ 4,170	$ 4,179
Percent of net assets	1.30%	1.30%	1.30%
Investment, Identifier [Axis]: Honors Holdings, LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Honors Holdings, LLC [Member]	Honors Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]	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%
Investment, Basis Spread, Variable Rate	7.50%	6.37%	7.50%
Investment Interest Rate	12.99%	11.90%	12.99%
Investment, Acquisition Date	Sep. 06, 2019	Sep. 06, 2019
Investment Maturity Date	Sep. 06, 2024	Sep. 06, 2024	Sep. 06, 2024
Investment Owned, Balance, Principal Amount	$ 5,281	$ 4,650
Investment Owned, at Cost	5,267	4,631
Investment Owned, at Fair Value	$ 4,490	$ 4,603
Percent of net assets	1.40%	1.50%	1.40%
Investment, Identifier [Axis]: Honors Holdings, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Honors Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Leisure Facilities [Member]		Leisure Facilities [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:PrimeRateMember		us-gaap:PrimeRateMember
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.30%		6.30%
Investment Interest Rate	12.59%		12.59%
Investment, Acquisition Date	Jun. 04, 2024
Investment Maturity Date	Sep. 06, 2024		Sep. 06, 2024
Investment Owned, Balance, Principal Amount	$ 811
Investment Owned, at Cost	811
Investment Owned, at Fair Value	$ 689
Percent of net assets	0.20%		0.20%
Investment, Identifier [Axis]: Honors Holdings, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Honors Holdings, LLC [Member]	Honors Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]	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%
Investment, Basis Spread, Variable Rate	7.50%	6.49%	7.50%
Investment Interest Rate	12.98%	12.02%	12.98%
Investment, Acquisition Date	Sep. 06, 2019	Sep. 06, 2019
Investment Maturity Date	Sep. 06, 2024	Sep. 06, 2024	Sep. 06, 2024
Investment Owned, Balance, Principal Amount	$ 11,788	$ 9,441
Investment Owned, at Cost	11,736	9,375
Investment Owned, at Fair Value	$ 10,023	$ 9,347
Percent of net assets	3.20%	3%	3.20%
Investment, Identifier [Axis]: ITS Buyer Inc. First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ITSBuyerIncMember	whfcl:ITSBuyerIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6%	5.50%	6%
Investment Interest Rate	11.09%	11.11%	11.09%
Investment, Acquisition Date	Feb. 17, 2022	Feb. 17, 2022
Investment Maturity Date	Jun. 15, 2026	Jun. 15, 2026	Jun. 15, 2026
Investment Owned, at Fair Value	$ 4
Investment, Identifier [Axis]: ITS Buyer Inc. First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ITSBuyerIncMember	whfcl:ITSBuyerIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6%	5.50%	6%
Investment Interest Rate	11.09%	11.11%	11.09%
Investment, Acquisition Date	Feb. 17, 2022	Feb. 17, 2022
Investment Maturity Date	Jun. 15, 2026	Jun. 15, 2026	Jun. 15, 2026
Investment Owned, Balance, Shares | shares		3,541
Investment Owned, Balance, Principal Amount	$ 3,326
Investment Owned, at Cost	3,297	$ 3,503
Investment Owned, at Fair Value	$ 3,319	$ 3,504
Fair Value As A Percentage of Member's Equity	9.40%	10.10%
Investment, Identifier [Axis]: ImageOne Industries, LLC Common A Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ImageOneIndustriesLLCMember	whfcl:ImageOneIndustriesLLCMember
Investment, Type [Extensible Enumeration]	whfcl:CommonAUnitsMember	whfcl:CommonAUnitsMember	whfcl:CommonAUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Support Services	Diversified Support Services	Diversified Support Services
Investment, Acquisition Date	Sep. 20, 2019	Sep. 20, 2019
Investment Owned, Balance, Principal Amount	$ 151	$ 149
Investment Owned, at Cost	8	7
Investment Owned, at Fair Value	$ 9	$ 9
Investment, Identifier [Axis]: Industrial Specialty Services USA LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:IndustrialSpecialtyServicesUSALLCMember	whfcl:IndustrialSpecialtyServicesUSALLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7.75%	6.75%	7.75%
Investment Interest Rate	13.23%	12.25%	13.23%
Investment, Acquisition Date	Dec. 31, 2021	Dec. 31, 2021
Investment Maturity Date	Dec. 31, 2026	Dec. 31, 2026	Dec. 31, 2026
Investment Owned, Balance, Principal Amount	$ 10,584	$ 11,767
Investment Owned, at Cost	10,479	11,626
Investment Owned, at Fair Value	$ 10,400	$ 11,537
Investment, Interest Rate, Paid in Kind	1%		1%
Investment, Interest Rate, Paid in Cash	12.23%		12.23%
Percent of net assets	3.30%	3.60%	3.30%
Investment, Identifier [Axis]: JVMC Holdings Corp First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:JVMCHoldingsCorpMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Investment Banking & Brokerage
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6.50%
Investment Interest Rate		11.96%
Investment, Acquisition Date		Feb. 28, 2019
Investment Maturity Date		Feb. 28, 2024
Investment Owned, Balance, Principal Amount		$ 3,522
Investment Owned, at Cost		3,521
Investment Owned, at Fair Value		$ 3,522
Percent of net assets		1.10%
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]	whfcl:JuniperLandscapingHoldingsLLCMember	whfcl:JuniperLandscapingHoldingsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6%	6.25%	6%
Investment Interest Rate	11.85%	11.94%	11.85%
Investment, Acquisition Date	Mar. 01, 2022	Mar. 01, 2022
Investment Maturity Date	Dec. 29, 2026	Dec. 29, 2026	Dec. 29, 2026
Investment Owned, Balance, Shares | shares		2,366
Investment Owned, Balance, Principal Amount	$ 2,355
Investment Owned, at Cost	2,334	$ 2,341
Investment Owned, at Fair Value	$ 2,355	$ 2,342
Fair Value As A Percentage of Member's Equity	6.60%	6.80%
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]	whfcl:JuniperLandscapingHoldingsLLCMember	whfcl:JuniperLandscapingHoldingsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6%	6.25%	6%
Investment Interest Rate	11.85%	12.11%	11.85%
Investment, Acquisition Date	Mar. 01, 2022	Mar. 01, 2022
Investment Maturity Date	Dec. 29, 2026	Dec. 29, 2026	Dec. 29, 2026
Investment Owned, Balance, Shares | shares		199
Investment Owned, at Cost		$ 197
Investment Owned, at Fair Value	$ 10	$ 193
Fair Value As A Percentage of Member's Equity		0.60%
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]	whfcl:JuniperLandscapingHoldingsLLCMember	whfcl:JuniperLandscapingHoldingsLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6%	6.25%	6%
Investment Interest Rate	11.85%	11.86%	11.85%
Investment, Acquisition Date	Mar. 01, 2022	Mar. 01, 2022
Investment Maturity Date	Dec. 29, 2026	Dec. 29, 2026	Dec. 29, 2026
Investment Owned, Balance, Shares | shares		11,192
Investment Owned, Balance, Principal Amount	$ 11,135
Investment Owned, at Cost	11,037	$ 11,073
Investment Owned, at Fair Value	$ 11,135	$ 11,080
Fair Value As A Percentage of Member's Equity	31.40%	32%
Investment, Identifier [Axis]: KORE Wireless Group Inc. First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:KoreWirelessGroupIncMember	whfcl:KoreWirelessGroupIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Wireless Telecommunication Services	Wireless Telecommunication Services	Wireless Telecommunication 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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.82%	11.88%	11.82%
Investment, Acquisition Date	Nov. 27, 2023	Nov. 27, 2023
Investment Maturity Date	Nov. 09, 2028	Nov. 09, 2028	Nov. 09, 2028
Investment Owned, at Fair Value	$ 11
Investment, Identifier [Axis]: KORE Wireless Group Inc. First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:KoreWirelessGroupIncMember	whfcl:KoreWirelessGroupIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Wireless Telecommunication Services	Wireless Telecommunication Services	Wireless Telecommunication 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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.82%	11.88%	11.82%
Investment, Acquisition Date	Nov. 27, 2023	Nov. 27, 2023
Investment Maturity Date	Nov. 09, 2028	Nov. 09, 2028	Nov. 09, 2028
Investment Owned, Balance, Shares | shares		6,418
Investment Owned, Balance, Principal Amount	$ 6,386
Investment Owned, at Cost	6,270	$ 6,294
Investment Owned, at Fair Value	$ 6,355	$ 6,295
Fair Value As A Percentage of Member's Equity	18%	18.20%
Investment, Identifier [Axis]: Keras Holdings, LLC Shares
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:KerasHoldingsLLCMember	whfcl:KerasHoldingsLLCMember
Investment, Type [Extensible Enumeration]	Common Stock [Member]	Common Stock [Member]	Common Stock [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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	$ 746	$ 683
Percent of net assets	0.20%	0.20%	0.20%
Investment, Identifier [Axis]: LINC Systems, LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate11.93%, Due 02/24/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:LINCSystemsLLCMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Trading Companies & Distributors
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6.25%
Investment Interest Rate		11.93%
Investment, Acquisition Date		Jun. 22, 2021
Investment Maturity Date		Feb. 24, 2026
Investment Owned, at Fair Value		$ (1)
Investment, Identifier [Axis]: LINC Systems, LLC., First Lien Secured Revolving Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate11.94%, Due 2/24/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:LINCSystemsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Trading Companies & Distributors		Trading Companies & 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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.98%		11.98%
Investment, Acquisition Date	Jun. 22, 2021
Investment Maturity Date	Feb. 24, 2026		Feb. 24, 2026
Investment Owned, at Fair Value	$ 5
Investment, Identifier [Axis]: LINC Systems, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate11.93%, Due 02/24/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:LINCSystemsLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Trading Companies & Distributors
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6.25%
Investment Interest Rate		11.93%
Investment, Acquisition Date		Jun. 22, 2021
Investment Maturity Date		Feb. 24, 2026
Investment Owned, Balance, Shares | shares		8,534
Investment Owned, at Cost		$ 8,454
Investment Owned, at Fair Value		$ 8,443
Fair Value As A Percentage of Member's Equity		24.40%
Investment, Identifier [Axis]: LINC Systems, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread L Plus, 6.25%, Rate11.94%, Due 2/24/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:LINCSystemsLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Trading Companies & Distributors		Trading Companies & 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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.98%		11.98%
Investment, Acquisition Date	Jun. 22, 2021
Investment Maturity Date	Feb. 24, 2026		Feb. 24, 2026
Investment Owned, Balance, Principal Amount	$ 8,282
Investment Owned, at Cost	8,223
Investment Owned, at Fair Value	$ 8,279
Fair Value As A Percentage of Member's Equity	23.40%
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]	whfcl:LMGHoldingsIncMember	whfcl:LMGHoldingsIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Electronic Equipment & Instruments	Electronic Equipment & Instruments	Electronic Equipment & Instruments
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7%	6.50%	7%
Investment Interest Rate	11.48%	12%	11.48%
Investment, Acquisition Date	Jun. 28, 2021	Jun. 28, 2021
Investment Maturity Date	Apr. 30, 2026	Apr. 30, 2026	Apr. 30, 2026
Investment Owned, Balance, Shares | shares		13,330
Investment Owned, Balance, Principal Amount	$ 13,261
Investment Owned, at Cost	13,162	$ 13,203
Investment Owned, at Fair Value	$ 13,261	$ 13,265
Fair Value As A Percentage of Member's Equity	37.40%	38.30%
Investment, Identifier [Axis]: LMG Holdings, Inc. First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:LMGHoldingsIncMember	whfcl:LMGHoldingsIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Electronic Equipment & Instruments	Electronic Equipment & Instruments	Electronic Equipment & Instruments
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7%	6.50%	7%
Investment Interest Rate	11.48%	12%	11.48%
Investment, Acquisition Date	Jun. 28, 2021	Jun. 28, 2021
Investment Maturity Date	Apr. 30, 2026	Apr. 30, 2026	Apr. 30, 2026
Investment Owned, at Fair Value	$ 6	$ 4
Investment, Identifier [Axis]: LSCS Holdings, Inc Second Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:LSCSHoldingsIncMember	whfcl:LSCSHoldingsIncMember
Investment, Type [Extensible Enumeration]	whfcl:SecondLienSecuredTermLoanMember	whfcl:SecondLienSecuredTermLoanMember	whfcl:SecondLienSecuredTermLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	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]
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]
Investment, Interest Rate, Floor	0.50%	0.50%	0.50%
Investment, Basis Spread, Variable Rate	8%	8%	8%
Investment Interest Rate	13.46%	13.47%	13.46%
Investment, Acquisition Date	Nov. 23, 2021	Nov. 23, 2021
Investment Maturity Date	Dec. 16, 2029	Dec. 16, 2029	Dec. 16, 2029
Investment Owned, Balance, Principal Amount	$ 5,000	$ 5,000
Investment Owned, at Cost	4,949	4,944
Investment Owned, at Fair Value	$ 5,002	$ 4,901
Percent of net assets	1.60%	1.50%	1.60%
Investment, Identifier [Axis]: Lab Logistics, LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:LabLogisticsLLCMember	whfcl:LabLogisticsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]	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%
Investment, Basis Spread, Variable Rate	7.25%	7.25%	7.25%
Investment Interest Rate	12.69%	12.71%	12.69%
Investment, Acquisition Date	Oct. 16, 2019	Oct. 16, 2019
Investment Maturity Date	Dec. 31, 2025	Sep. 25, 2024	Dec. 31, 2025
Investment Owned, Balance, Principal Amount	$ 5,062	$ 5,090
Investment Owned, at Cost	5,062	5,089
Investment Owned, at Fair Value	$ 5,062	$ 5,090
Percent of net assets	1.60%	1.60%	1.60%
Investment, Identifier [Axis]: Lab Logistics, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:LabLogisticsLLCMember	whfcl:LabLogisticsLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]	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%
Investment, Basis Spread, Variable Rate	7.25%	7.25%	7.25%
Investment Interest Rate	12.69%	12.71%	12.69%
Investment, Acquisition Date	Oct. 16, 2019	Oct. 16, 2019
Investment Maturity Date	Dec. 31, 2025	Sep. 25, 2024	Dec. 31, 2025
Investment Owned, Balance, Principal Amount	$ 5,422	$ 5,449
Investment Owned, at Cost	5,420	5,442
Investment Owned, at Fair Value	$ 5,422	$ 5,449
Percent of net assets	1.70%	1.70%	1.70%
Investment, Identifier [Axis]: Leviathan Intermediate Holdco, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:LeviathanIntermediateHoldcoLlcMember	whfcl:LeviathanIntermediateHoldcoLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1.50%	1.50%	1.50%
Investment, Basis Spread, Variable Rate	7.50%	7.50%	7.50%
Investment Interest Rate	12.98%	13%	12.98%
Investment, Acquisition Date	Dec. 27, 2022	Dec. 27, 2022
Investment Maturity Date	Dec. 27, 2027	Dec. 27, 2027	Dec. 27, 2027
Investment Owned, at Fair Value	$ 12	$ 14
Investment, Identifier [Axis]: Leviathan Intermediate Holdco, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:LeviathanIntermediateHoldcoLlcMember	whfcl:LeviathanIntermediateHoldcoLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1.50%	1.50%	1.50%
Investment, Basis Spread, Variable Rate	7.50%	7.50%	7.50%
Investment Interest Rate	12.98%	13%	12.98%
Investment, Acquisition Date	Dec. 27, 2022	Dec. 27, 2022
Investment Maturity Date	Dec. 27, 2027	Dec. 27, 2027	Dec. 27, 2027
Investment Owned, Balance, Principal Amount	$ 13,278	$ 10,346
Investment Owned, at Cost	13,009	10,098
Investment Owned, at Fair Value	$ 13,411	$ 10,346
Percent of net assets	4.30%	3.30%	4.30%
Investment, Identifier [Axis]: Lift Brands, Inc First Lien Secured Term Loan A
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:LiftBrandsIncMember	whfcl:LiftBrandsIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredTermLoanAMember	whfcl:FirstLienSecuredTermLoanAMember	whfcl:FirstLienSecuredTermLoanAMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]	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%
Investment, Basis Spread, Variable Rate	7.50%	7.50%	7.50%
Investment Interest Rate	12.94%	12.96%	12.94%
Investment, Acquisition Date	Jun. 29, 2020	Jun. 29, 2020
Investment Maturity Date	Jun. 29, 2025	Jun. 29, 2025	Jun. 29, 2025
Investment Owned, Balance, Principal Amount	$ 5,489	$ 5,518
Investment Owned, at Cost	5,472	5,492
Investment Owned, at Fair Value	$ 5,489	$ 5,457
Percent of net assets	1.80%	1.70%	1.80%
Investment, Identifier [Axis]: Lift Brands, Inc First Lien Secured Term Loan B
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:LiftBrandsIncMember	whfcl:LiftBrandsIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredTermLoanBMember	whfcl:FirstLienSecuredTermLoanBMember	whfcl:FirstLienSecuredTermLoanBMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Leisure Facilities [Member]	Leisure Facilities [Member]	Leisure Facilities [Member]
Investment, Basis Spread, Variable Rate	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
Investment Owned, Balance, Principal Amount	$ 1,519	$ 1,450
Investment Owned, at Cost	1,514	1,441
Investment Owned, at Fair Value	$ 1,519	$ 1,406
Investment, Interest Rate, Paid in Kind	9.50%	9.50%	9.50%
Percent of net assets	0.50%	0.40%	0.50%
Investment, Identifier [Axis]: Luxury Brand Holdings, Inc First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:LuxuryBrandHoldingsIncMember	whfcl:LuxuryBrandHoldingsIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Broadline Retail	Broadline Retail	Broadline Retail
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	5.75%	6.50%	5.75%
Investment Interest Rate	11.09%	11.96%	11.09%
Investment, Acquisition Date	Dec. 04, 2020	Dec. 04, 2020
Investment Maturity Date	Jun. 04, 2026	Jun. 04, 2026	Jun. 04, 2026
Investment Owned, Balance, Principal Amount	$ 4,580	$ 5,280
Investment Owned, at Cost	4,548	5,233
Investment Owned, at Fair Value	$ 4,580	$ 5,280
Percent of net assets	1.50%	1.70%	1.50%
Investment, Identifier [Axis]: M&M OpCo. LLC (d/b/a Escalent, Inc.) First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	M&M OpCo. LLC (d/b/a Escalent, Inc.)	M&M OpCo. LLC (d/b/a Escalent, Inc.)
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising	Advertising	Advertising
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	8%	8%	8%
Investment Interest Rate	13.43%	13.45%	13.43%
Investment, Acquisition Date	Apr. 07, 2023	Apr. 07, 2023
Investment Maturity Date	Apr. 09, 2029	Apr. 09, 2029	Apr. 09, 2029
Investment Owned, at Fair Value	$ 6	$ (1)
Investment, Identifier [Axis]: M&M OpCo. LLC (d/b/a Escalent, Inc.) First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	M&M OpCo. LLC (d/b/a Escalent, Inc.)	M&M OpCo. LLC (d/b/a Escalent, Inc.)
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising	Advertising	Advertising
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	8%	8%	8%
Investment Interest Rate	13.43%	13.45%	13.43%
Investment, Acquisition Date	Apr. 07, 2023	Apr. 07, 2023
Investment Maturity Date	Apr. 09, 2029	Apr. 09, 2029	Apr. 09, 2029
Investment Owned, Balance, Principal Amount	$ 4,702	$ 4,726
Investment Owned, at Cost	4,590	4,602
Investment Owned, at Fair Value	$ 4,702	$ 4,580
Percent of net assets	1.50%	1.40%	1.50%
Investment, Identifier [Axis]: MBS Highway, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MbsHighwayLlcMember	whfcl:MbsHighwayLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7.50%	7.50%	7.50%
Investment Interest Rate	13.06%	13.18%	13.06%
Investment, Acquisition Date	Oct. 13, 2022	Oct. 13, 2022
Investment Maturity Date	Oct. 13, 2027	Oct. 13, 2027	Oct. 13, 2027
Investment Owned, Balance, Principal Amount	$ 9,334	$ 9,381
Investment Owned, at Cost	9,181	9,204
Investment Owned, at Fair Value	$ 9,190	$ 9,089
Percent of net assets	2.90%	2.90%	2.90%
Investment, Identifier [Axis]: MGT Merger Target, LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MgtMergerTargetLlcMember	whfcl:MgtMergerTargetLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	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
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.11%	6.50%	6.11%
Investment Interest Rate	11.54%	11.98%	11.54%
Investment, Acquisition Date	May 10, 2023	May 10, 2023
Investment Maturity Date	Apr. 10, 2029	Apr. 10, 2029	Apr. 10, 2029
Investment Owned, Balance, Shares | shares		392
Investment Owned, Balance, Principal Amount	$ 826
Investment Owned, at Cost	807	$ 378
Investment Owned, at Fair Value	$ 822	$ 389
Fair Value As A Percentage of Member's Equity	2.30%	1.10%
Investment, Identifier [Axis]: MGT Merger Target, LLC First lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MgtMergerTargetLlcMember	whfcl:MgtMergerTargetLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	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
Investment, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:PrimeRateMember	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]	us-gaap:PrimeRateMember
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.39%	6.50%	6.39%
Investment Interest Rate	11.82%	11.98%	11.82%
Investment, Acquisition Date	May 10, 2023	May 10, 2023
Investment Maturity Date	Apr. 10, 2028	Apr. 10, 2028	Apr. 10, 2028
Investment Owned, at Fair Value	$ 15	$ 11
Investment, Identifier [Axis]: MGT Merger Target, LLC First lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MgtMergerTargetLlcMember	whfcl:MgtMergerTargetLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	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
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.39%	6.50%	6.39%
Investment Interest Rate	11.82%	11.98%	11.82%
Investment, Acquisition Date	May 10, 2023	May 10, 2023
Investment Maturity Date	Apr. 10, 2029	Apr. 10, 2029	Apr. 10, 2029
Investment Owned, Balance, Shares | shares		6,247
Investment Owned, Balance, Principal Amount	$ 7,242
Investment Owned, at Cost	7,076	$ 6,084
Investment Owned, at Fair Value	$ 7,288	$ 6,194
Fair Value As A Percentage of Member's Equity	20.60%	17.90%
Investment, Identifier [Axis]: MSI Information Services, Inc First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MSIInformationServicesIncMember	whfcl:MSIInformationServicesIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	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]
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Base Rate [Member]	Base Rate [Member]	Base Rate [Member]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.84%	6.84%	6.84%
Investment Interest Rate	15.06%	15.06%	15.06%
Investment, Acquisition Date	Apr. 25, 2022	Apr. 25, 2022
Investment Maturity Date	Apr. 24, 2026	Apr. 24, 2026	Apr. 24, 2026
Investment Owned, Balance, Principal Amount	$ 825	$ 825
Investment Owned, at Cost	818	815
Investment Owned, at Fair Value	$ 690	$ 776
Percent of net assets	0.20%	0.20%	0.20%
Investment, Identifier [Axis]: MSI Information Services, Inc First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MSIInformationServicesIncMember	whfcl:MSIInformationServicesIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	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]
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7.75%	7.75%	7.75%
Investment Interest Rate	13.25%	13.29%	13.25%
Investment, Acquisition Date	Apr. 25, 2022	Apr. 25, 2022
Investment Maturity Date	Apr. 24, 2026	Apr. 24, 2026	Apr. 24, 2026
Investment Owned, Balance, Principal Amount	$ 7,333	$ 7,333
Investment Owned, at Cost	7,266	7,248
Investment Owned, at Fair Value	$ 6,376	$ 6,972
Percent of net assets	2%	2.20%	2%
Investment, Identifier [Axis]: Manchester Acquisition Sub LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ManchesterAcquisitionSubLLCMember	whfcl:ManchesterAcquisitionSubLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	0.75%	0.75%	0.75%
Investment, Basis Spread, Variable Rate	5.75%	5.75%	5.75%
Investment Interest Rate	11.25%	11.28%	11.25%
Investment, Acquisition Date	Nov. 16, 2021	Nov. 16, 2021
Investment Maturity Date	Dec. 01, 2026	Dec. 01, 2026	Dec. 01, 2026
Investment Owned, Balance, Principal Amount	$ 1,167	$ 7,840
Investment Owned, at Cost	1,136	7,587
Investment Owned, at Fair Value	$ 1,099	$ 7,215
Percent of net assets	0.40%	2.30%	0.40%
Investment, Identifier [Axis]: Marlin DTC-LS Midco 2, LLC, First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.99%, Due 7/1/2025
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:MarlinDTC-LSMidco2LLCMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Broadline Retail
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6.50%
Investment Interest Rate		11.99%
Investment, Acquisition Date		Jul. 19, 2019
Investment Maturity Date		Jul. 01, 2025
Investment Owned, at Fair Value		$ (3)
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]	whfcl:MarlinDTC-LSMidco2LLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	whfcl:InternetAndDirectMarketingRetailMember		whfcl:InternetAndDirectMarketingRetailMember
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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.92%		11.92%
Investment, Acquisition Date	Jul. 19, 2019
Investment Maturity Date	Jul. 01, 2025		Jul. 01, 2025
Investment Owned, at Fair Value	$ 1
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]	whfcl:MarlinDTC-LSMidco2LLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	whfcl:InternetAndDirectMarketingRetailMember		whfcl:InternetAndDirectMarketingRetailMember
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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.92%		11.92%
Investment, Acquisition Date	Jul. 19, 2019
Investment Maturity Date	Jul. 01, 2025		Jul. 01, 2025
Investment Owned, Balance, Principal Amount	$ 18,810
Investment Owned, at Cost	18,737
Investment Owned, at Fair Value	$ 18,758
Fair Value As A Percentage of Member's Equity	52.90%
Investment, Identifier [Axis]: Marlin DTC-LS Midco 2., First Lien Secured Term, Floor 1.00%, Spread L plus 6.50%, Rate 11.99%, Due 7/1/25
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:MarlinDTC-LSMidco2LLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Broadline Retail
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6.50%
Investment Interest Rate		11.99%
Investment, Acquisition Date		Jul. 19, 2019
Investment Maturity Date		Jul. 01, 2025
Investment Owned, Balance, Shares | shares		18,908
Investment Owned, at Cost		$ 18,798
Investment Owned, at Fair Value		$ 18,762
Fair Value As A Percentage of Member's Equity		54.10%
Investment, Identifier [Axis]: Max Solutions Inc. Common Stock
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MaxSolutionsIncMember	whfcl:MaxSolutionsIncMember
Investment, Type [Extensible Enumeration]	Common Stock [Member]	Common Stock [Member]	Common Stock [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Paper Packaging	Paper and Plastic Packaging Products and Materials [Member]	Paper Packaging
Investment, Acquisition Date	Sep. 29, 2022	Sep. 29, 2022
Investment Owned, Balance, Principal Amount	$ 4	$ 4
Investment Owned, at Cost	400	400
Investment Owned, at Fair Value	$ 61	$ 179
Percent of net assets		0.10%
Investment, Identifier [Axis]: Max Solutions, Inc., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus 7.66%, Rate 13.15%, Due 9/29/28
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:MaxSolutionsIncMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Paper and Plastic Packaging Products and Materials [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		7.66%
Investment Interest Rate		13.15%
Investment, Acquisition Date		Oct. 07, 2022
Investment Maturity Date		Sep. 29, 2028
Investment Owned, at Fair Value		$ (17)
Investment, Identifier [Axis]: Max Solutions, Inc., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 7.66%, Rate 13.15%, Due 9/29/28
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:MaxSolutionsIncMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Paper and Plastic Packaging Products and Materials [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		7.66%
Investment Interest Rate		13.15%
Investment, Acquisition Date		Oct. 07, 2022
Investment Maturity Date		Sep. 29, 2028
Investment Owned, Balance, Shares | shares		6,589
Investment Owned, at Cost		$ 6,485
Investment Owned, at Fair Value		$ 6,488
Fair Value As A Percentage of Member's Equity		18.70%
Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus 7.66%, Rate 13.20%, Due 9/29/28
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MaxSolutionsIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	8.26%		8.26%
Investment Interest Rate	13.71%		13.71%
Investment, Acquisition Date	Oct. 07, 2022
Investment Maturity Date	Sep. 29, 2028		Sep. 29, 2028
Investment Owned, Balance, Principal Amount	$ 416
Investment Owned, at Cost	413
Investment Owned, at Fair Value	$ 396
Fair Value As A Percentage of Member's Equity	1.10%
Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 7.66%, Rate 13.15%, Due 9/29/28
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:MaxSolutionsIncMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Paper and Plastic Packaging Products and Materials [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		whfcl:CanadianDollarOfferedRateMember
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		7.66%
Investment Interest Rate		13.15%
Investment, Acquisition Date		Oct. 07, 2022
Investment Maturity Date		Sep. 29, 2028
Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 7.66%, Rate 13.20%, Due 9/29/28
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MaxSolutionsIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Paper Packaging		Paper Packaging
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:CanadianDollarOfferedRateMember		whfcl:CanadianDollarOfferedRateMember
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	8.26%		8.26%
Investment Interest Rate	13.71%		13.71%
Investment, Acquisition Date	Oct. 07, 2022
Investment Maturity Date	Sep. 29, 2028		Sep. 29, 2028
Investment Owned, at Fair Value	$ (6)
Investment, Identifier [Axis]: Max Solutions, Inc.., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 7.66%, Rate 13.20%, Due 9/29/28
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MaxSolutionsIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	8.28%		8.28%
Investment Interest Rate	13.72%		13.72%
Investment, Acquisition Date	Oct. 07, 2022
Investment Maturity Date	Sep. 29, 2028		Sep. 29, 2028
Investment Owned, Balance, Principal Amount	$ 6,556
Investment Owned, at Cost	6,463
Investment Owned, at Fair Value	$ 6,231
Fair Value As A Percentage of Member's Equity	17.60%
Investment, Identifier [Axis]: Maxor Acquisition, Inc. First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MaxorAcquisitionInc.Member	whfcl:MaxorAcquisitionInc.Member
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Drug Retail	Drug Retail	Drug Retail
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.75%	6.75%	6.75%
Investment Interest Rate	12.29%	12.48%	12.29%
Investment, Acquisition Date	Apr. 11, 2023	Apr. 11, 2023
Investment Maturity Date	Mar. 01, 2029	Mar. 01, 2029	Mar. 01, 2029
Investment Owned, at Fair Value	$ 11	$ 9
Investment, Identifier [Axis]: Maxor Acquisition, Inc. First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MaxorAcquisitionInc.Member	whfcl:MaxorAcquisitionInc.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Drug Retail	Drug Retail	Drug Retail
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.75%	6.75%	6.75%
Investment Interest Rate	12.29%	12.48%	12.29%
Investment, Acquisition Date	Apr. 11, 2023	Apr. 11, 2023
Investment Maturity Date	Mar. 01, 2029	Mar. 01, 2029	Mar. 01, 2029
Investment Owned, Balance, Shares | shares		5,053
Investment Owned, Balance, Principal Amount	$ 5,027
Investment Owned, at Cost	4,910	$ 4,922
Investment Owned, at Fair Value	$ 5,078	$ 5,013
Fair Value As A Percentage of Member's Equity	14.30%	14.50%
Investment, Identifier [Axis]: Medical Device Inc First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MedicalDeviceIncMember	whfcl:MedicalDeviceIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Health Care Supplies	Health Care Supplies	Health Care Supplies
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]
Investment, Interest Rate, Floor	1.25%	1%	1.25%
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.93%	11.95%	11.93%
Investment, Acquisition Date	Jul. 27, 2023	Jul. 27, 2023
Investment Maturity Date	Jul. 11, 2029	Jul. 11, 2029	Jul. 11, 2029
Investment Owned, at Fair Value	$ 5	$ 3
Investment, Identifier [Axis]: Medical Device Inc First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MedicalDeviceIncMember	whfcl:MedicalDeviceIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Health Care Supplies	Health Care Supplies	Health Care Supplies
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]
Investment, Interest Rate, Floor	1.25%	1%	1.25%
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.93%	11.95%	11.93%
Investment, Acquisition Date	Jul. 27, 2023	Jul. 27, 2023
Investment Maturity Date	Jul. 11, 2029	Jul. 11, 2029	Jul. 11, 2029
Investment Owned, Balance, Shares | shares		2,660
Investment Owned, Balance, Principal Amount	$ 2,647
Investment Owned, at Cost	2,591	$ 2,599
Investment Owned, at Fair Value	$ 2,633	$ 2,626
Fair Value As A Percentage of Member's Equity	7.40%	7.60%
Investment, Identifier [Axis]: Merriman Holdings LP (d/b/a Escalent, Inc.) Class A Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MerrimanHoldingsLPMember	whfcl:MerrimanHoldingsLPMember
Investment, Type [Extensible Enumeration]	whfcl:ClassAUnitsMember	whfcl:ClassAUnitsMember	whfcl:ClassAUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising	Advertising	Advertising
Investment, Acquisition Date	Apr. 07, 2023	Apr. 07, 2023
Investment Owned, Balance, Principal Amount	$ 327	$ 327
Investment Owned, at Cost	333	333
Investment Owned, at Fair Value	$ 341	$ 295
Percent of net assets	0.10%	0.10%	0.10%
Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 11.42%, Due 11/20/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MetaBuyerLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6%		6%
Investment Interest Rate	11.39%		11.39%
Investment, Acquisition Date	Dec. 16, 2021
Investment Maturity Date	Nov. 01, 2027		Nov. 01, 2027
Investment Owned, Balance, Principal Amount	$ 878
Investment Owned, at Cost	868
Investment Owned, at Fair Value	$ 878
Fair Value As A Percentage of Member's Equity	2.50%
Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 11.56%, Due 11/01/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:MetaBuyerLLCMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Pharmaceuticals
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6%
Investment Interest Rate		11.56%
Investment, Acquisition Date		Dec. 16, 2021
Investment Maturity Date		Nov. 01, 2027
Investment Owned, Balance, Shares | shares		883
Investment Owned, at Cost		$ 871
Investment Owned, at Fair Value		$ 883
Fair Value As A Percentage of Member's Equity		2.50%
Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Term Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 11.43%, Due 11/20/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MetaBuyerLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6%		6%
Investment Interest Rate	11.43%		11.43%
Investment, Acquisition Date	Dec. 16, 2021
Investment Maturity Date	Nov. 01, 2027		Nov. 01, 2027
Investment Owned, Balance, Principal Amount	$ 967
Investment Owned, at Cost	956
Investment Owned, at Fair Value	$ 967
Fair Value As A Percentage of Member's Equity	2.70%
Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Term Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 11.46%, Due 11/01/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:MetaBuyerLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Pharmaceuticals
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6%
Investment Interest Rate		11.46%
Investment, Acquisition Date		Dec. 16, 2021
Investment Maturity Date		Nov. 01, 2027
Investment Owned, Balance, Shares | shares		971
Investment Owned, at Cost		$ 959
Investment Owned, at Fair Value		$ 971
Fair Value As A Percentage of Member's Equity		2.80%
Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Term Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 9.65%, Due 11/20/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MetaBuyerLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Pharmaceuticals		Pharmaceuticals
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:EuroInterbankOfferedRateMember		whfcl:EuroInterbankOfferedRateMember
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6%		6%
Investment Interest Rate	9.61%		9.61%
Investment, Acquisition Date	Dec. 16, 2021
Investment Maturity Date	Nov. 01, 2027		Nov. 01, 2027
Investment Owned, Balance, Principal Amount	$ 12,101
Investment Owned, at Cost	13,501
Investment Owned, at Fair Value	$ 12,960
Fair Value As A Percentage of Member's Equity	36.50%
Investment, Identifier [Axis]: Meta Buyer LLC., First Lien Secured Term Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 9.87%, Due 11/01/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:MetaBuyerLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Pharmaceuticals
Investment, Variable Interest Rate, Type [Extensible Enumeration]		whfcl:EuroInterbankOfferedRateMember
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6%
Investment Interest Rate		9.87%
Investment, Acquisition Date		Dec. 16, 2021
Investment Maturity Date		Nov. 01, 2027
Investment Owned, Balance, Shares | shares		12,163
Investment Owned, at Cost		$ 13,552
Investment Owned, at Fair Value		$ 13,401
Fair Value As A Percentage of Member's Equity		38.70%
Investment, Identifier [Axis]: Meta Buyer LLC.,First Lien Secured Revolving Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 11.53%, Due 11/01/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:MetaBuyerLLCMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Pharmaceuticals
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6%
Investment Interest Rate		11.53%
Investment, Acquisition Date		Dec. 16, 2021
Investment Maturity Date		Nov. 01, 2027
Investment Owned, Balance, Shares | shares		1,156
Investment Owned, at Cost		$ 1,141
Investment Owned, at Fair Value		$ 1,161
Fair Value As A Percentage of Member's Equity		3.30%
Investment, Identifier [Axis]: Meta Buyer LLC.,First Lien Secured Revolving Loan, Floor 1.00%, Spread E Plus 6.00%, Rate 12.11%, Due 11/20/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MetaBuyerLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6%		6%
Investment Interest Rate	11.37%		11.37%
Investment, Acquisition Date	Dec. 16, 2021
Investment Maturity Date	Nov. 01, 2027		Nov. 01, 2027
Investment Owned, Balance, Principal Amount	$ 1,156
Investment Owned, at Cost	1,143
Investment Owned, at Fair Value	$ 1,160
Fair Value As A Percentage of Member's Equity	3.30%
Investment, Identifier [Axis]: Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC) First Lien Secured Bridge Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Midwest Texas Tea CA, LLC [Member]	Midwest Texas Tea CA, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredBridgeLoanMember	whfcl:FirstLienSecuredBridgeLoanMember	whfcl:FirstLienSecuredBridgeLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	14%	14%	14%
Investment Interest Rate	19.44%	19.46%	19.44%
Investment, Acquisition Date	Dec. 22, 2023	Dec. 22, 2023
Investment Maturity Date	Dec. 22, 2025	Dec. 22, 2025	Dec. 22, 2025
Investment Owned, Balance, Principal Amount	$ 1,510	$ 1,464
Investment Owned, at Cost	1,478	1,420
Investment Owned, at Fair Value	$ 1,534	$ 1,420
Investment, Interest Rate, Paid in Kind	6%	6%	6%
Investment, Interest Rate, Paid in Cash	13.44%	13.46%	13.44%
Percent of net assets	0.50%	0.40%	0.50%
Investment, Identifier [Axis]: Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC) First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Midwest Texas Tea CA, LLC [Member]	Midwest Texas Tea CA, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7.25%	7.25%	7.25%
Investment Interest Rate	12.69%	12.71%	12.69%
Investment, Acquisition Date	Dec. 22, 2023	Dec. 22, 2023
Investment Maturity Date	Dec. 22, 2028	Dec. 22, 2028	Dec. 22, 2028
Investment Owned, Balance, Principal Amount	$ 403
Investment Owned, at Cost	394
Investment Owned, at Fair Value	$ 403
Percent of net assets	0.10%		0.10%
Investment, Identifier [Axis]: Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC) First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Midwest Texas Tea CA, LLC [Member]	Midwest Texas Tea CA, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7.25%	7.25%	7.25%
Investment Interest Rate	12.69%	12.71%	12.69%
Investment, Acquisition Date	Dec. 22, 2023	Dec. 22, 2023
Investment Maturity Date	Dec. 22, 2028	Dec. 22, 2028	Dec. 22, 2028
Investment Owned, Balance, Principal Amount	$ 267
Investment Owned, at Cost	261
Investment Owned, at Fair Value	$ 269
Percent of net assets	0.10%		0.10%
Investment, Identifier [Axis]: Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC) First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Midwest Texas Tea CA, LLC [Member]	Midwest Texas Tea CA, LLC [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7.25%	7.25%	7.25%
Investment Interest Rate	12.69%	12.71%	12.69%
Investment, Acquisition Date	Dec. 22, 2023	Dec. 22, 2023
Investment Maturity Date	Dec. 22, 2028	Dec. 22, 2028	Dec. 22, 2028
Investment Owned, Balance, Principal Amount	$ 9,490	$ 9,490
Investment Owned, at Cost	9,278	9,254
Investment Owned, at Fair Value	$ 9,411	$ 9,254
Percent of net assets	3%	2.90%	3%
Investment, Identifier [Axis]: Monarch Collective Holdings, LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Monarch Collective Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Real Estates [Member]		Real Estates [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]
Investment, Interest Rate, Floor	1.50%		1.50%
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	12.08%		12.08%
Investment, Acquisition Date	Jan. 10, 2024
Investment Maturity Date	Jan. 10, 2029		Jan. 10, 2029
Investment Owned, Balance, Principal Amount	$ 872
Investment Owned, at Cost	860
Investment Owned, at Fair Value	$ 860
Percent of net assets	0.30%		0.30%
Investment, Identifier [Axis]: Monarch Collective Holdings, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Monarch Collective Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Real Estates [Member]		Real Estates [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]
Investment, Interest Rate, Floor	1.50%		1.50%
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	12.08%		12.08%
Investment, Acquisition Date	Jan. 10, 2024
Investment Maturity Date	Jan. 10, 2029		Jan. 10, 2029
Investment Owned, Balance, Principal Amount	$ 9,353
Investment Owned, at Cost	9,140
Investment Owned, at Fair Value	$ 9,223
Percent of net assets	2.90%		2.90%
Investment, Identifier [Axis]: Motivational CIV, LLC Class B Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MotivationalCIVLLCMember	whfcl:MotivationalCIVLLCMember
Investment, Type [Extensible Enumeration]	whfcl:ClassBUnitsMember	whfcl:ClassBUnitsMember	whfcl:ClassBUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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, Identifier [Axis]: Motivational Marketing, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MotivationalMarketingLLCMember	whfcl:MotivationalMarketingLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	9.25%	7.25%	9.25%
Investment Interest Rate	14.69%	12.71%	14.69%
Investment, Acquisition Date	Jul. 12, 2021	Jul. 12, 2021
Investment Maturity Date	Jul. 12, 2026	Jul. 12, 2026	Jul. 12, 2026
Investment Owned, Balance, Principal Amount	$ 1,182	$ 473
Investment Owned, at Cost	1,172	468
Investment Owned, at Fair Value	$ 1,034	$ 338
Investment, Interest Rate, Paid in Kind	0.75%	0.75%	0.75%
Investment, Interest Rate, Paid in Cash	13.94%	11.96%	13.94%
Percent of net assets	0.30%	0.10%	0.30%
Investment, Identifier [Axis]: Motivational Marketing, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:MotivationalMarketingLLCMember	whfcl:MotivationalMarketingLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	9.25%	7.25%	9.25%
Investment Interest Rate	14.69%	12.71%	14.69%
Investment, Acquisition Date	Jul. 12, 2021	Jul. 12, 2021
Investment Maturity Date	Jul. 12, 2026	Jul. 12, 2026	Jul. 12, 2026
Investment Owned, Balance, Principal Amount	$ 10,031	$ 9,989
Investment Owned, at Cost	9,950	9,888
Investment Owned, at Fair Value	$ 8,776	$ 8,790
Investment, Interest Rate, Paid in Kind	0.75%	0.75%	0.75%
Investment, Interest Rate, Paid in Cash	13.94%	11.96%	13.94%
Percent of net assets	2.90%	2.80%	2.90%
Investment, Identifier [Axis]: NNA Services, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:NNAServicesLLCMember	whfcl:NNAServicesLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Support Services	Diversified Support Services	Diversified Support 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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7.25%	6.75%	7.25%
Investment Interest Rate	12.73%	12.25%	12.73%
Investment, Acquisition Date	Aug. 27, 2021	Aug. 27, 2021
Investment Maturity Date	Aug. 27, 2026	Aug. 27, 2026	Aug. 27, 2026
Investment Owned, Balance, Principal Amount	$ 9,271	$ 9,417
Investment Owned, at Cost	9,221	9,354
Investment Owned, at Fair Value	$ 9,270	$ 9,293
Percent of net assets	3%	2.90%	3%
Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.92%, Due 1/21/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:NPAVLessorCorp.Member
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6%		6%
Investment Interest Rate	11.94%		11.94%
Investment, Acquisition Date	Mar. 01, 2022
Investment Maturity Date	Jan. 21, 2027		Jan. 21, 2027
Investment Owned, Balance, Principal Amount	$ 725
Investment Owned, at Cost	718
Investment Owned, at Fair Value	$ 645
Fair Value As A Percentage of Member's Equity	1.80%
Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.96%, Due 1/21/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:NPAVLessorCorp.Member
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6.50%
Investment Interest Rate		11.96%
Investment, Acquisition Date		Mar. 01, 2022
Investment Maturity Date		Jan. 21, 2027
Investment Owned, Balance, Shares | shares		725
Investment Owned, at Cost		$ 716
Investment Owned, at Fair Value		$ 647
Fair Value As A Percentage of Member's Equity		1.90%
Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.92%, Due 1/21/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:NPAVLessorCorp.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6%		6%
Investment Interest Rate	11.94%		11.94%
Investment, Acquisition Date	Mar. 01, 2022
Investment Maturity Date	Jan. 21, 2027		Jan. 21, 2027
Investment Owned, Balance, Principal Amount	$ 6,502
Investment Owned, at Cost	6,435
Investment Owned, at Fair Value	$ 5,785
Fair Value As A Percentage of Member's Equity	16.40%
Investment, Identifier [Axis]: NPAV Lessor Corp., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.96%, Due 1/21/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:NPAVLessorCorp.Member
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6.50%
Investment Interest Rate		11.96%
Investment, Acquisition Date		Mar. 01, 2022
Investment Maturity Date		Jan. 21, 2027
Investment Owned, Balance, Shares | shares		7,510
Investment Owned, at Cost		$ 7,418
Investment Owned, at Fair Value		$ 6,706
Fair Value As A Percentage of Member's Equity		19.30%
Investment, Identifier [Axis]: Naviga Inc First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:NavigaIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	5%		5%
Investment Interest Rate	10.44%		10.44%
Investment, Acquisition Date	May 14, 2024
Investment Maturity Date	Jul. 31, 2024		Jul. 31, 2024
Investment Owned, Balance, Principal Amount	$ 94
Investment Owned, at Cost	93
Investment Owned, at Fair Value	$ 93
Investment, Identifier [Axis]: Naviga Inc First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:NavigaIncMember	whfcl:NavigaIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Application Software	Application Software	Application Software
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Base Rate [Member]	Base Rate [Member]	Base Rate [Member]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.84%	6.84%	6.84%
Investment Interest Rate	12.78%	12.78%	12.78%
Investment, Acquisition Date	Jun. 14, 2019	Jun. 14, 2019
Investment Maturity Date	Jun. 28, 2024	Feb. 27, 2024	Jun. 28, 2024
Investment Owned, Balance, Principal Amount	$ 301	$ 271
Investment Owned, at Cost	301	271
Investment Owned, at Fair Value	$ 192	$ 268
Percent of net assets	0.10%	0.10%	0.10%
Investment, Identifier [Axis]: Naviga Inc First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:NavigaIncMember	whfcl:NavigaIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7%	7%	7%
Investment Interest Rate	12.40%	12.45%	12.40%
Investment, Acquisition Date	Jun. 14, 2019	Jun. 14, 2019
Investment Maturity Date	Jun. 28, 2024	Feb. 27, 2024	Jun. 28, 2024
Investment Owned, Balance, Principal Amount	$ 3,140	$ 3,148
Investment Owned, at Cost	3,140	3,148
Investment Owned, at Fair Value	$ 2,003	$ 3,113
Percent of net assets	0.60%	1%	0.60%
Investment, Identifier [Axis]: New American Crafts Holdings, LLC Class A Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:NewAmericanCraftsHoldingsLlcClassaUnitsMember	whfcl:NewAmericanCraftsHoldingsLlcMember
Investment, Type [Extensible Enumeration]	whfcl:ClassAUnitsMember	whfcl:ClassAUnitsMember	whfcl:ClassAUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Office Services And Supplies [Member]	Office Services And Supplies [Member]	Office Services And Supplies [Member]
Investment, Acquisition Date	Mar. 16, 2023	Mar. 16, 2023
Investment Owned, Balance, Principal Amount	$ 1	$ 1
Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Panos Brands, Llc [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	11.07%		11.07%
Investment, Acquisition Date	Jun. 14, 2024
Investment Maturity Date	May 14, 2029		May 14, 2029
Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Revolving Loan One
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Panos Brands, Llc [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	11.07%		11.07%
Investment, Acquisition Date	May 14, 2024
Investment Maturity Date	May 14, 2029		May 14, 2029
Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Panos Brands, Llc [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	11.07%		11.07%
Investment, Acquisition Date	Jun. 14, 2024
Investment Maturity Date	May 14, 2029		May 14, 2029
Investment Owned, Balance, Principal Amount	$ 4,543
Investment Owned, at Cost	4,454
Investment Owned, at Fair Value	$ 4,454
Fair Value As A Percentage of Member's Equity	12.60%
Investment, Identifier [Axis]: PANOS Brands, LLC First Lien Secured Term Loan One
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Panos Brands, Llc [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	5.75%		5.75%
Investment Interest Rate	11.07%		11.07%
Investment, Acquisition Date	May 14, 2024
Investment Maturity Date	May 14, 2029		May 14, 2029
Investment Owned, Balance, Principal Amount	$ 4,088
Investment Owned, at Cost	4,009
Investment Owned, at Fair Value	$ 4,009
Percent of net assets	1.30%		1.30%
Investment, Identifier [Axis]: PFB Holdco, Inc Class A Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PFBHoldcoIncMember
Investment, Type [Extensible Enumeration]	whfcl:ClassAUnitsMember		whfcl:ClassAUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Building Products		Building Products
Investment, Acquisition Date	Dec. 17, 2021
Investment Owned, Balance, Principal Amount			$ 1
Investment Owned, at Cost	$ 423
Investment Owned, at Fair Value	$ 1,034
Percent of net assets	0.30%		0.30%
Investment, Identifier [Axis]: PFB Holding Company, LLC (d/b/a PFB Corporation) Class A Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:PfbHoldingCompanyLlcMember
Investment, Type [Extensible Enumeration]		whfcl:ClassAUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Building Products
Investment, Acquisition Date		Dec. 17, 2021
Investment Owned, Balance, Principal Amount		$ 1
Investment Owned, at Cost		423
Investment Owned, at Fair Value		$ 1,053
Percent of net assets		0.30%
Investment, Identifier [Axis]: PG Dental New Jersey Parent, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:PGDentalNewJerseyParentLLCMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Health Care Services [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Base Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		7%
Investment Interest Rate		13.98%
Investment, Acquisition Date		Nov. 25, 2020
Investment Maturity Date		Nov. 25, 2025
Investment Owned, Balance, Principal Amount		$ 704
Investment Owned, at Cost		698
Investment Owned, at Fair Value		$ 704
Investment, Interest Rate, Paid in Kind		2.25%
Investment, Interest Rate, Paid in Cash		11.73%
Percent of net assets		0.20%
Investment, Identifier [Axis]: PG Dental New Jersey Parent, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:PGDentalNewJerseyParentLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Health Care Services [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		7.50%
Investment Interest Rate		12.96%
Investment, Acquisition Date		Nov. 25, 2020
Investment Maturity Date		Nov. 25, 2025
Investment Owned, Balance, Principal Amount		$ 6,400
Investment Owned, at Cost		6,348
Investment Owned, at Fair Value		$ 6,400
Investment, Interest Rate, Paid in Kind		2.25%
Investment, Interest Rate, Paid in Cash		10.71%
Percent of net assets		2%
Investment, Identifier [Axis]: PLTFRM Companies, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	PLTFRM Companies, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising		Advertising
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]
Investment, Interest Rate, Floor	3%		3%
Investment, Basis Spread, Variable Rate	9%		9%
Investment Interest Rate	14.33%		14.33%
Investment, Acquisition Date	Jan. 29, 2024
Investment Maturity Date	Jan. 29, 2029		Jan. 29, 2029
Investment Owned, Balance, Principal Amount	$ 713
Investment Owned, at Cost	694
Investment Owned, at Fair Value	$ 705
Investment, Interest Rate, Paid in Kind	1%		1%
Investment, Interest Rate, Paid in Cash	13.33%		13.33%
Percent of net assets	0.20%		0.20%
Investment, Identifier [Axis]: PLTFRM Companies, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	PLTFRM Companies, LLC [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Advertising		Advertising
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]
Investment, Interest Rate, Floor	3%		3%
Investment, Basis Spread, Variable Rate	9%		9%
Investment Interest Rate	14.34%		14.34%
Investment, Acquisition Date	Jan. 29, 2024
Investment Maturity Date	Jan. 29, 2029		Jan. 29, 2029
Investment Owned, Balance, Principal Amount	$ 7,948
Investment Owned, at Cost	7,730
Investment Owned, at Fair Value	$ 7,831
Investment, Interest Rate, Paid in Kind	1%		1%
Investment, Interest Rate, Paid in Cash	13.34%		13.34%
Percent of net assets	2.60%		2.60%
Investment, Identifier [Axis]: Patagonia Hold co Llc First Lien Secured Term Loans
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PatagoniaHoldcoLLCMember	whfcl:PatagoniaHoldcoLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	0.50%	0.50%	0.50%
Investment, Basis Spread, Variable Rate	5.75%	5.75%	5.75%
Investment Interest Rate	11.07%	11.12%	11.07%
Investment, Acquisition Date	Aug. 05, 2022	Aug. 05, 2022
Investment Maturity Date	Aug. 01, 2029	Aug. 01, 2029	Aug. 01, 2029
Investment Owned, Balance, Principal Amount	$ 14,369	$ 14,442
Investment Owned, at Cost	12,480	12,357
Investment Owned, at Fair Value	$ 13,621	$ 13,191
Percent of net assets	4.40%	4.20%	4.40%
Investment, Identifier [Axis]: Pavement Partners Interco, LLC (d/b/a Pave America, LLC) First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PavementPartnersIntercoLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	12.23%		12.23%
Investment, Acquisition Date	Jun. 28, 2024
Investment Maturity Date	Feb. 07, 2028		Feb. 07, 2028
Investment Owned, Balance, Principal Amount	$ 607
Investment Owned, at Cost	589
Investment Owned, at Fair Value	$ 589
Percent of net assets	0.20%		0.20%
Investment, Identifier [Axis]: Pavement Partners Interco, LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PaveAmericaLlcMember	whfcl:PavementPartnersIntercoLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.75%	6.75%	6.75%
Investment Interest Rate	12.22%	12.42%	12.22%
Investment, Acquisition Date	Mar. 17, 2023	Mar. 17, 2023
Investment Maturity Date	Feb. 07, 2028	Feb. 07, 2028	Feb. 07, 2028
Investment Owned, Balance, Shares | shares		575
Investment Owned, Balance, Principal Amount	$ 572
Investment Owned, at Cost	559	$ 560
Investment Owned, at Fair Value	$ 575	$ 569
Fair Value As A Percentage of Member's Equity	1.60%	1.60%
Investment, Identifier [Axis]: Pavement Partners Interco, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PaveAmericaLlcMember	whfcl:PavementPartnersIntercoLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.75%	6.75%	6.75%
Investment Interest Rate	12.22%	12.42%	12.22%
Investment, Acquisition Date	Mar. 17, 2023	Mar. 17, 2023
Investment Maturity Date	Feb. 07, 2028	Feb. 07, 2028	Feb. 07, 2028
Investment Owned, Balance, Principal Amount	$ 307
Investment Owned, at Cost	300
Investment Owned, at Fair Value	$ 311	$ 5
Fair Value As A Percentage of Member's Equity	0.90%
Investment, Identifier [Axis]: Pavement Partners Interco, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PaveAmericaLlcMember	whfcl:PavementPartnersIntercoLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.75%	6.50%
Investment Interest Rate	12.22%	12.27%	12.22%
Investment, Acquisition Date	Mar. 17, 2023	Mar. 17, 2023
Investment Maturity Date	Feb. 07, 2028	Feb. 07, 2028	Feb. 07, 2028
Investment Owned, Balance, Shares | shares		4,455
Investment Owned, Balance, Principal Amount	$ 4,535
Investment Owned, at Cost	4,435	$ 4,344
Investment Owned, at Fair Value	$ 4,556	$ 4,405
Fair Value As A Percentage of Member's Equity	12.80%	12.70%
Investment, Identifier [Axis]: Pennsylvania Machine Works, LLC First Lien Secured Term Loan, SOFR 11.61
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:PennsylvaniaMachineWorksLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Industrial Machinery & Supplies & Components
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6%
Investment Interest Rate		11.61%
Investment, Acquisition Date		Mar. 25, 2022
Investment Maturity Date		Mar. 08, 2027
Investment Owned, Balance, Shares | shares		6,561
Investment Owned, at Cost		$ 6,498
Investment Owned, at Fair Value		$ 6,561
Fair Value As A Percentage of Member's Equity		18.90%
Investment, Identifier [Axis]: Pirtek Holdco, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PirtekHoldcoLLCMember	whfcl:PirtekHoldcoLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Support Services	Diversified Support Services	Diversified Support 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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	5.75%	5.75%	5.75%
Investment Interest Rate	11.04%	11.20%	11.04%
Investment, Acquisition Date	Oct. 31, 2023	Oct. 31, 2023
Investment Maturity Date	Oct. 26, 2028	Oct. 26, 2028	Oct. 26, 2028
Investment Owned, at Fair Value	$ 7
Investment, Identifier [Axis]: Pirtek Holdco, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PirtekHoldcoLLCMember	whfcl:PirtekHoldcoLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Support Services	Diversified Support Services	Diversified Support 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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	5.75%	5.75%	5.75%
Investment Interest Rate	11.04%	11.20%	11.04%
Investment, Acquisition Date	Oct. 31, 2023	Oct. 31, 2023
Investment Maturity Date	Oct. 26, 2028	Oct. 26, 2028	Oct. 26, 2028
Investment Owned, Balance, Shares | shares		7,500
Investment Owned, Balance, Principal Amount	$ 7,463
Investment Owned, at Cost	7,317	$ 7,337
Investment Owned, at Fair Value	$ 7,367	$ 7,337
Fair Value As A Percentage of Member's Equity	20.80%	21.20%
Investment, Identifier [Axis]: PlayMonster LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PlaymonsterGroupLLCMember	whfcl:PlaymonsterGroupLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment Owned, at Fair Value	$ 1,024	$ 1,363			2,977
Investment, Identifier [Axis]: Playmonster Group Equity Inc Common Equity
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PlaymonsterGroupEquityIncMember	whfcl:PlaymonsterGroupEquityIncMember
Investment, Type [Extensible Enumeration]	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]	whfcl:PlaymonsterGroupEquityIncMember	whfcl:PlaymonsterGroupEquityIncMember
Investment, Type [Extensible Enumeration]	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]	whfcl:PlaymonsterGroupEquityIncMember	whfcl:PlaymonsterGroupEquityIncMember
Investment, Type [Extensible Enumeration]	Common Stock [Member]	Common Stock [Member]	Common Stock [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Leisure Products	Leisure Products	Leisure Products
Investment, Acquisition Date	Jan. 24, 2022	Jan. 24, 2022
Investment Owned, Balance, Principal Amount	$ 72	$ 72
Investment Owned, at Cost	$ 460	$ 460
Investment, Identifier [Axis]: Playmonster Group Equity, Inc. Preferred Stock
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PlaymonsterGroupEquityIncMember	whfcl:PlaymonsterGroupEquityIncMember
Investment, Type [Extensible Enumeration]	us-gaap:PreferredStockMember	us-gaap:PreferredStockMember	us-gaap:PreferredStockMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Leisure Products	Leisure Products	Leisure Products
Investment, Basis Spread, Variable Rate	14%	14%	14%
Investment, Acquisition Date	Jan. 24, 2022	Jan. 24, 2022
Investment Owned, Balance, Principal Amount	$ 36	$ 36
Investment Owned, at Cost	$ 3,600	$ 3,600
Investment, Interest Rate, Paid in Kind	14%	14%	14%
Investment, Identifier [Axis]: Playmonster Group LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PlaymonsterGroupLLCMember	whfcl:PlayMonsterLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	9%	9%	9%
Investment, Acquisition Date	Jan. 24, 2022	Jan. 24, 2022
Investment Maturity Date	Jun. 08, 2026	Jun. 08, 2026	Jun. 08, 2026
Investment Owned, Balance, Principal Amount	$ 4,548	$ 4,232
Investment Owned, at Cost	3,661	3,661
Investment Owned, at Fair Value	$ 1,024	$ 1,363
Investment, Interest Rate, Paid in Kind	14.48%	14.53%	14.48%
Percent of net assets	0.30%	0.40%	0.30%
Investment, Identifier [Axis]: Playmonster Group LLC Priority First Lien Secured Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PlaymonsterGroupLLCMember	whfcl:PlaymonsterGroupLLCMember
Investment, Type [Extensible Enumeration]	whfcl:PriorityFirstLienSecuredTermLoanMember	whfcl:PriorityFirstLienSecuredTermLoanMember	whfcl:PriorityFirstLienSecuredTermLoanMember
Investment Owned, at Fair Value	$ 1,055	$ 1,015			176
Investment, Identifier [Axis]: Playmonster Group LLC, Priority First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PlaymonsterGroupLLCMember	whfcl:PlayMonsterLLCMember
Investment, Type [Extensible Enumeration]	whfcl:PriorityFirstLienSecuredTermLoanMember	whfcl:PriorityFirstLienSecuredTermLoanMember	whfcl:PriorityFirstLienSecuredTermLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.75%	6.75%	6.75%
Investment, Acquisition Date	Dec. 09, 2022	Dec. 09, 2022
Investment Maturity Date	Jun. 08, 2026	Jun. 08, 2026	Jun. 08, 2026
Investment Owned, Balance, Principal Amount	$ 1,213	$ 1,140
Investment Owned, at Cost	1,195	1,118
Investment Owned, at Fair Value	$ 1,055	$ 1,015
Investment, Interest Rate, Paid in Kind	12.25%	12.37%	12.25%
Percent of net assets	0.30%	0.30%	0.30%
Investment, Identifier [Axis]: Potpourri Group, Inc First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:PotpourriGroupIncMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Broadline Retail
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1.50%
Investment, Basis Spread, Variable Rate		8.25%
Investment Interest Rate		13.71%
Investment, Acquisition Date		Jul. 03, 2019
Investment Maturity Date		Jul. 03, 2024
Investment Owned, Balance, Principal Amount		$ 13,799
Investment Owned, at Cost		13,767
Investment Owned, at Fair Value		$ 13,799
Percent of net assets		4.40%
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 Interest Rate	11.44%		11.44%
Investment, Identifier [Axis]: Poultry Holdings LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.92% (11.17% Cash + 0.75% PIK), Due 6/28/25
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PoultryHoldingsLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	7.25%		7.25%
Investment Interest Rate	11.44%		11.44%
Investment, Acquisition Date	Oct. 21, 2019
Investment Maturity Date	Jun. 28, 2025		Jun. 28, 2025
Investment Owned, Balance, Principal Amount	$ 6,748
Investment Owned, at Cost	6,726
Investment Owned, at Fair Value	$ 6,748
Fair Value As A Percentage of Member's Equity	19%
Investment, Identifier [Axis]: Poultry Holdings LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus 6.50%, Rate 11.96% (11.21% Cash + 0.75% PIK), Due 6/28/25
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:PoultryHoldingsLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Packaged Foods & Meats
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6.50%
Investment Interest Rate		11.96%
Investment, Acquisition Date		Oct. 21, 2019
Investment Maturity Date		Jun. 28, 2025
Investment Owned, Balance, Shares | shares		6,939
Investment Owned, at Cost		$ 6,904
Investment Owned, at Fair Value		$ 6,904
Fair Value As A Percentage of Member's Equity		19.90%
Investment, Identifier [Axis]: Power Service Group CR Acquisition Inc First Lien Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PowerServiceGroupCrAcquisitionIncMember	whfcl:PowerServiceGroupCrAcquisitionIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Heavy Electrical Equipment [Member]	Heavy Electrical Equipment [Member]	Heavy Electrical Equipment [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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.75%	6.75%	6.75%
Investment Interest Rate	12.23%	12.25%	12.23%
Investment, Acquisition Date	Jul. 11, 2022	Jul. 11, 2022
Investment Maturity Date	Jun. 25, 2026	Jun. 25, 2026	Jun. 25, 2026
Investment Owned, Balance, Principal Amount	$ 1,346	$ 1,356
Investment Owned, at Cost	1,330	1,336
Investment Owned, at Fair Value	$ 1,359	$ 1,353
Percent of net assets	0.40%	0.40%	0.40%
Investment, Identifier [Axis]: Power Service Group CR Acquisition Inc First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:PowerServiceGroupCrAcquisitionIncMember	whfcl:PowerServiceGroupCrAcquisitionIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Heavy Electrical Equipment [Member]	Heavy Electrical Equipment [Member]	Heavy Electrical Equipment [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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.75%	6.75%	6.75%
Investment Interest Rate	12.23%	12.25%	12.23%
Investment, Acquisition Date	Jun. 25, 2021	Jun. 25, 2021
Investment Maturity Date	Jun. 25, 2026	Jun. 25, 2026	Jun. 25, 2026
Investment Owned, Balance, Principal Amount	$ 8,732	$ 8,804
Investment Owned, at Cost	8,659	8,712
Investment Owned, at Fair Value	$ 8,820	$ 8,782
Percent of net assets	2.80%	2.80%	2.80%
Investment, Identifier [Axis]: Pressurized Holdings, LLC Common Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Pressurized Holdings, LLC [Member]	Pressurized Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	whfcl:CommonUnitsMember	whfcl:CommonUnitsMember	whfcl:CommonUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Chemicals [Member]	Diversified Chemicals [Member]	Diversified Chemicals [Member]
Investment, Acquisition Date	Mar. 16, 2023	Mar. 16, 2023
Investment, Identifier [Axis]: Pressurized Holdings, LLC Preferred Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Pressurized Holdings, LLC [Member]	Pressurized Holdings, LLC [Member]
Investment, Type [Extensible Enumeration]	Preferred Units [Member]	Preferred Units [Member]	Preferred Units [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Chemicals [Member]	Diversified Chemicals [Member]	Diversified Chemicals [Member]
Investment, Basis Spread, Variable Rate	14%		14%
Investment, Acquisition Date	Mar. 16, 2023	Mar. 16, 2023
Investment Owned, at Cost	$ 4,537	$ 4,537
Investment Owned, at Fair Value	$ 178	$ 251
Investment, Interest Rate, Paid in Kind	14%	14%	14%
Percent of net assets	0.10%	0.10%	0.10%
Investment, Identifier [Axis]: Project Castle, Inc First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:ProjectCastleIncMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Industrial Machinery & Supplies & Components
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		0.50%
Investment, Basis Spread, Variable Rate		5.50%
Investment Interest Rate		10.89%
Investment, Acquisition Date		Jun. 09, 2022
Investment Maturity Date		Jun. 01, 2029
Investment Owned, Balance, Principal Amount		$ 6,027
Investment Owned, at Cost		5,536
Investment Owned, at Fair Value		$ 5,364
Percent of net assets		1.70%
Investment, Identifier [Axis]: Quest Events, LLC Common Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:QuestEventsLLCMember
Investment, Type [Extensible Enumeration]		whfcl:CommonUnitsMember
Investment, Industry Sector [Extensible Enumeration]		Diversified Support Services
Investment, Acquisition Date		Dec. 28, 2018
Investment Owned, Balance, Principal Amount		$ 317
Investment Owned, at Cost		360
Investment Owned, at Fair Value		$ 305
Percent of net assets		0.10%
Investment, Identifier [Axis]: Quest Events, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:QuestEventsLLCMember	whfcl:QuestEventsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Support Services	Diversified Support Services	Diversified Support 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]
Investment, Interest Rate, Floor	2%	2%	2%
Investment, Basis Spread, Variable Rate	7%	7.25%	7%
Investment Interest Rate	12.60%	12.86%	12.60%
Investment, Acquisition Date	Jul. 19, 2019	Jul. 19, 2019
Investment Maturity Date	Sep. 30, 2026	Sep. 30, 2026	Sep. 30, 2026
Investment Owned, Balance, Shares | shares		247
Investment Owned, Balance, Principal Amount	$ 247
Investment Owned, at Cost	246	$ 246
Investment Owned, at Fair Value	$ 248	$ 242
Fair Value As A Percentage of Member's Equity	0.70%	0.70%
Investment, Identifier [Axis]: Quest Events, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:QuestEventsLLCMember	whfcl:QuestEventsLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Support Services	Diversified Support Services	Diversified Support 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]
Investment, Interest Rate, Floor	2%	2%	2%
Investment, Basis Spread, Variable Rate	7%	7.25%	7%
Investment Interest Rate	12.60%	12.86%	12.60%
Investment, Acquisition Date	Jul. 19, 2019	Jul. 19, 2019
Investment Maturity Date	Sep. 30, 2026	Sep. 30, 2026	Sep. 30, 2026
Investment Owned, Balance, Shares | shares		11,709
Investment Owned, Balance, Principal Amount	$ 11,651
Investment Owned, at Cost	11,613	$ 11,663
Investment Owned, at Fair Value	$ 11,651	$ 11,557
Fair Value As A Percentage of Member's Equity	32.90%	33.30%
Investment, Identifier [Axis]: Quest Events, LLC Preferred Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:QuestEventsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:CommonUnitsMember		whfcl:CommonUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Diversified Support Services		Diversified Support Services
Investment, Acquisition Date	Dec. 28, 2018
Investment Owned, Balance, Principal Amount	$ 324
Investment Owned, at Cost	367
Investment Owned, at Fair Value	$ 144
Investment, Identifier [Axis]: RCKC Acquisitions LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:RCKCAcquisitionsLLCMember	whfcl:RCKCAcquisitionsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	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
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.25%	6%	6.25%
Investment Interest Rate	10.73%	11.53%	10.73%
Investment, Acquisition Date	Jan. 27, 2021	Jan. 27, 2021
Investment Maturity Date	Jan. 02, 2029	Dec. 31, 2026	Jan. 02, 2029
Investment Owned, Balance, Shares | shares		2,976
Investment Owned, Balance, Principal Amount	$ 2,961
Investment Owned, at Cost	2,934	$ 2,945
Investment Owned, at Fair Value	$ 2,966	$ 2,965
Fair Value As A Percentage of Member's Equity	8.40%	8.60%
Investment, Identifier [Axis]: RCKC Acquisitions LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:RCKCAcquisitionsLLCMember	whfcl:RCKCAcquisitionsLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	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
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.25%	6%	6.25%
Investment Interest Rate	10.73%	11.50%	10.73%
Investment, Acquisition Date	Jan. 27, 2021	Jan. 27, 2021
Investment Maturity Date	Jan. 02, 2029	Dec. 31, 2026	Jan. 02, 2029
Investment Owned, Balance, Shares | shares		11,036
Investment Owned, Balance, Principal Amount	$ 10,980
Investment Owned, at Cost	10,885	$ 10,925
Investment Owned, at Fair Value	$ 10,998	$ 10,993
Fair Value As A Percentage of Member's Equity	31%	31.70%
Investment, Identifier [Axis]: RCKC Acquisitions LLC, First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:RCKCAcquisitionsLLCMember	whfcl:RCKCAcquisitionsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	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
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.25%	6%	6.25%
Investment Interest Rate	10.73%	11.58%	10.73%
Investment, Acquisition Date	Jan. 27, 2021	Jan. 27, 2021
Investment Maturity Date	Jan. 02, 2029	Dec. 31, 2026	Jan. 02, 2029
Investment Owned, Balance, Shares | shares		107
Investment Owned, at Cost		$ 106
Investment Owned, at Fair Value	$ 12	$ 114
Fair Value As A Percentage of Member's Equity		0.30%
Investment, Identifier [Axis]: RLJ Pro-Vac, Inc. First Lien Secured Term Loan SOFR
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:RLJPro-VacInc.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.69%		11.69%
Investment, Acquisition Date	Jan. 23, 2024
Investment Maturity Date	Dec. 31, 2026		Dec. 31, 2026
Investment Owned, Balance, Principal Amount	$ 6,692
Investment Owned, at Cost	6,576
Investment Owned, at Fair Value	$ 6,610
Fair Value As A Percentage of Member's Equity	18.60%
Investment, Identifier [Axis]: Ribbon Communications Operating Company, Inc. (d/b/a Ribbon Communications Inc.) First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Ribbon Communications Operating Company, Inc. [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Communications Equipment [Member]		Communications Equipment [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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.59%		11.59%
Investment, Acquisition Date	Jun. 21, 2024
Investment Maturity Date	Jun. 21, 2029		Jun. 21, 2029
Investment, Identifier [Axis]: Ribbon Communications Operating Company, Inc. (d/b/a Ribbon Communications Inc.) First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Ribbon Communications Operating Company, Inc. [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Communications Equipment [Member]		Communications Equipment [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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	11.59%		11.59%
Investment, Acquisition Date	Jun. 21, 2024
Investment Maturity Date	Jun. 21, 2029		Jun. 21, 2029
Investment Owned, Balance, Principal Amount	$ 8,800
Investment Owned, at Cost	8,625
Investment Owned, at Fair Value	$ 8,625
Percent of net assets	2.90%		2.90%
Investment, Identifier [Axis]: Ross-Simons Topco, LP Preferred Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:Ross-SimonsTopcoLPMember	whfcl:Ross-SimonsTopcoLPMember
Investment, Type [Extensible Enumeration]	Preferred Units [Member]	Preferred Units [Member]	Preferred Units [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Broadline Retail	Broadline Retail	Broadline Retail
Investment, Basis Spread, Variable Rate	8%	8%	8%
Investment, Acquisition Date	Dec. 04, 2020	Dec. 04, 2020
Investment Owned, Balance, Principal Amount	$ 600	$ 600
Investment Owned, at Cost	514	514
Investment Owned, at Fair Value	$ 648	$ 832
Investment, Interest Rate, Paid in Kind	8%	8%	8%
Percent of net assets	0.20%	0.30%	0.20%
Investment, Identifier [Axis]: SFS Global Holding Company Warrants
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SFSGlobalHoldingCompanyMember	whfcl:SFSGlobalHoldingCompanyMember
Investment, Type [Extensible Enumeration]	Warrant [Member]	Warrant [Member]	Warrant [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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
Investment, Identifier [Axis]: Salon Republic Holdings, LLC Common Stock
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SalonRepublicHoldingsLlcMember
Investment, Type [Extensible Enumeration]	Common Stock [Member]		Common Stock [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Real Estate Operating Companies		Real Estate Operating Companies
Investment, Acquisition Date	Dec. 02, 2022
Investment Owned, Balance, Principal Amount	$ 400
Investment Owned, at Cost	400
Investment Owned, at Fair Value	$ 266
Percent of net assets	0.10%		0.10%
Investment, Identifier [Axis]: Salon Republic Holdings, LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SalonRepublicHoldingsLlcMember	whfcl:SalonRepublicHoldingsLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7.50%	7.50%	7.50%
Investment Interest Rate	12.93%	12.96%	12.93%
Investment, Acquisition Date	Dec. 02, 2022	Dec. 02, 2022
Investment Maturity Date	Dec. 02, 2027	Dec. 02, 2027	Dec. 02, 2027
Investment Owned, Balance, Principal Amount	$ 900	$ 741
Investment Owned, at Cost	887	729
Investment Owned, at Fair Value	$ 945	$ 745
Percent of net assets	0.30%	0.20%	0.30%
Investment, Identifier [Axis]: Salon Republic Holdings, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SalonRepublicHoldingsLlcMember	whfcl:SalonRepublicHoldingsLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7.50%	7.50%	7.50%
Investment Interest Rate	12.93%	12.96%	12.93%
Investment, Acquisition Date	Dec. 02, 2022	Dec. 02, 2022
Investment Maturity Date	Dec. 02, 2027	Dec. 02, 2027	Dec. 02, 2027
Investment Owned, Balance, Principal Amount		$ 251
Investment Owned, at Cost		245
Investment Owned, at Fair Value	$ 18	$ 258
Percent of net assets		0.10%
Investment, Identifier [Axis]: Salon Republic Holdings, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SalonRepublicHoldingsLlcMember	whfcl:SalonRepublicHoldingsLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7.50%	7.50%	7.50%
Investment Interest Rate	12.94%	12.96%	12.94%
Investment, Acquisition Date	Dec. 02, 2022	Dec. 02, 2022
Investment Maturity Date	Dec. 02, 2027	Dec. 02, 2027	Dec. 02, 2027
Investment Owned, Balance, Principal Amount	$ 5,099	$ 5,121
Investment Owned, at Cost	4,993	5,001
Investment Owned, at Fair Value	$ 5,125	$ 5,077
Percent of net assets	1.60%	1.60%	1.60%
Investment, Identifier [Axis]: Salon Republic Holdings, LLC, Preferred Stock
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SalonRepublicHoldingsLlcMember
Investment, Type [Extensible Enumeration]	us-gaap:PreferredStockMember		us-gaap:PreferredStockMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Real Estate Operating Companies		Real Estate Operating Companies
Investment, Basis Spread, Variable Rate	8%		8%
Investment, Acquisition Date	Dec. 02, 2022
Investment Owned, Balance, Principal Amount	$ 200
Investment Owned, at Cost	200
Investment Owned, at Fair Value	$ 227
Percent of net assets	0.10%		0.10%
Investment, Identifier [Axis]: Salon Republic Investments LLC Common Stock
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:SalonRepublicInvestmentsLlcMember
Investment, Type [Extensible Enumeration]		Common Stock [Member]
Investment, Industry Sector [Extensible Enumeration]		Real Estate Operating Companies
Investment, Acquisition Date		Dec. 02, 2022
Investment Owned, Balance, Principal Amount		$ 400
Investment Owned, at Cost		400
Investment Owned, at Fair Value		$ 241
Percent of net assets		0.10%
Investment, Identifier [Axis]: Salon Republic Investments LLC Preferred Stock
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:SalonRepublicInvestmentsLlcMember
Investment, Type [Extensible Enumeration]		us-gaap:PreferredStockMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Operating Companies
Investment, Acquisition Date		Dec. 02, 2022
Investment Owned, Balance, Principal Amount		$ 200
Investment Owned, at Cost		200
Investment Owned, at Fair Value		$ 218
Investment, Interest Rate, Paid in Kind	8%	8%	8%
Percent of net assets		0.10%
Investment, Identifier [Axis]: Sigue Corporation Warrants
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SigueCorporationMember	whfcl:SigueCorporationMember
Investment, Type [Extensible Enumeration]	Warrant [Member]	Warrant [Member]	Warrant [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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
Investment Owned, Balance, Principal Amount	$ 22	$ 22
Investment Owned, at Cost	$ 2,890	2,890
Investment Owned, at Fair Value		$ 3,472
Percent of net assets		1.10%
Investment, Identifier [Axis]: Sleep OpCo LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SleepOpCoLLCMember	whfcl:SleepOpCoLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.95%	12.07%	11.95%
Investment, Acquisition Date	Oct. 12, 2021	Oct. 12, 2021
Investment Maturity Date	Oct. 12, 2026	Oct. 12, 2026	Oct. 12, 2026
Investment Owned, at Fair Value	$ 24	$ 3
Investment, Identifier [Axis]: Sleep OpCo LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SleepOpCoLLCMember	whfcl:SleepOpCoLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.95%	12.07%	11.95%
Investment, Acquisition Date	Oct. 12, 2021	Oct. 12, 2021
Investment Maturity Date	Oct. 12, 2026	Oct. 12, 2026	Oct. 12, 2026
Investment Owned, Balance, Principal Amount	$ 20,511	$ 20,616
Investment Owned, at Cost	20,322	20,385
Investment Owned, at Fair Value	$ 20,511	$ 20,407
Percent of net assets	6.60%	6.40%	6.60%
Investment, Identifier [Axis]: Smalto Inc, First Lien Secured Term Loan Interest Rate 10.18
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:SmaltoInc.Member
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Household Appliances
Investment, Variable Interest Rate, Type [Extensible Enumeration]		whfcl:EuroInterbankOfferedRateMember
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6.25%
Investment Interest Rate		10.18%
Investment, Acquisition Date		May 04, 2022
Investment Maturity Date		Apr. 28, 2028
Investment Owned, Balance, Shares | shares		6,576
Investment Owned, at Cost		$ 6,821
Investment Owned, at Fair Value		$ 7,172
Fair Value As A Percentage of Member's Equity		20.70%
Investment, Identifier [Axis]: Smalto Inc, First Lien Secured Term Loan Interest Rate 10.22
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SmaltoInc.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Household Appliances		Household Appliances
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:EuroInterbankOfferedRateMember		whfcl:EuroInterbankOfferedRateMember
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.25%		6.25%
Investment Interest Rate	9.97%		9.97%
Investment, Acquisition Date	May 04, 2022
Investment Maturity Date	Apr. 28, 2028		Apr. 28, 2028
Investment Owned, Balance, Principal Amount	$ 6,423
Investment Owned, at Cost	6,673
Investment Owned, at Fair Value	$ 6,879
Fair Value As A Percentage of Member's Equity	19.40%
Investment, Identifier [Axis]: Smalto Inc, First Lien Secured Term Loan Interest Rate 11.48
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SmaltoInc.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6%		6%
Investment Interest Rate	11.48%		11.48%
Investment, Acquisition Date	May 04, 2022
Investment Maturity Date	Apr. 28, 2028		Apr. 28, 2028
Investment Owned, Balance, Principal Amount	$ 978
Investment Owned, at Cost	966
Investment Owned, at Fair Value	$ 978
Fair Value As A Percentage of Member's Equity	2.80%
Investment, Identifier [Axis]: Smalto Inc, First Lien Secured Term Loan Interest Rate 11.50
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:SmaltoInc.Member
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Household Appliances
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6%
Investment Interest Rate		11.50%
Investment, Acquisition Date		May 04, 2022
Investment Maturity Date		Apr. 28, 2028
Investment Owned, Balance, Shares | shares		1,001
Investment Owned, at Cost		$ 987
Investment Owned, at Fair Value		$ 996
Fair Value As A Percentage of Member's Equity		2.90%
Investment, Identifier [Axis]: Snap Fitness Holdings, Inc Class A Common Stock
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SnapFitnessHoldingsIncMember	whfcl:SnapFitnessHoldingsIncMember
Investment, Type [Extensible Enumeration]	us-gaap:CommonClassAMember	us-gaap:CommonClassAMember	us-gaap:CommonClassAMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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	$ 167	$ 130
Percent of net assets	0.10%		0.10%
Investment, Identifier [Axis]: Snap Fitness Holdings, Inc First Lien Secured Term Loan C
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SnapFitnessHoldingsIncMember	whfcl:SnapFitnessHoldingsIncMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredTermLoanCMember	whfcl:FirstLienSecuredTermLoanCMember	whfcl:FirstLienSecuredTermLoanCMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Leisure Facilities [Member]	Leisure Facilities [Member]	Leisure Facilities [Member]
Investment, Basis Spread, Variable Rate	9.50%	9.50%	9.50%
Investment, Acquisition Date	Jun. 29, 2020	Jun. 29, 2020
Investment Owned, Balance, Principal Amount	$ 1,737	$ 1,657
Investment Owned, at Cost	1,734	1,654
Investment Owned, at Fair Value	$ 1,736	$ 1,623
Investment, Interest Rate, Paid in Kind	9.50%	9.50%	9.50%
Percent of net assets	0.60%	0.50%	0.60%
Investment, Identifier [Axis]: Snap Fitness Holdings, Inc Warrants
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SnapFitnessHoldingsIncMember	whfcl:SnapFitnessHoldingsIncMember
Investment, Type [Extensible Enumeration]	Warrant [Member]	Warrant [Member]	Warrant [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Leisure Facilities [Member]	Leisure Facilities [Member]	Leisure Facilities [Member]
Investment, Acquisition Date	Jun. 29, 2020	Jun. 29, 2020
Investment Owned, Balance, Principal Amount	$ 1	$ 1
Investment Owned, at Cost	793	793
Investment Owned, at Fair Value	$ 68	$ 53
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate 11.95
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Environmental & Facilities Services		Environmental & Facilities Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Sterling Overnight Index Average [Member]		Sterling Overnight Index Average [Member]
Investment, Interest Rate, Floor	0%		0%
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	12.02%		12.02%
Investment, Acquisition Date	Mar. 23, 2023
Investment Maturity Date	Sep. 28, 2029		Sep. 28, 2029
Investment Owned, Balance, Principal Amount	$ 1,850
Investment Owned, at Cost	2,288
Investment Owned, at Fair Value	$ 2,338
Fair Value As A Percentage of Member's Equity	6.60%
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate 12.05
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	0.50%		0.50%
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	12.12%		12.12%
Investment, Acquisition Date	Mar. 23, 2023
Investment Maturity Date	Sep. 28, 2029		Sep. 28, 2029
Investment Owned, Balance, Principal Amount	$ 582
Investment Owned, at Cost	570
Investment Owned, at Fair Value	$ 582
Fair Value As A Percentage of Member's Equity	1.60%
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate CDOR
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SolarHoldingsBidcoLimitedMember	whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Environmental & Facilities Services	Environmental & Facilities Services	Environmental & Facilities Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:CanadianOvernightRepoRateAverageMember	whfcl:CanadianDollarOfferedRateMember	whfcl:CanadianOvernightRepoRateAverageMember
Investment, Interest Rate, Floor	0.50%	0.50%	0.50%
Investment, Basis Spread, Variable Rate	6.75%	6.50%	6.75%
Investment Interest Rate	11.85%	12.08%	11.85%
Investment, Acquisition Date	Mar. 23, 2023	Mar. 23, 2023
Investment Maturity Date	Sep. 28, 2029	Sep. 28, 2029	Sep. 28, 2029
Investment Owned, Balance, Shares | shares		458
Investment Owned, Balance, Principal Amount	$ 458
Investment Owned, at Cost	324	$ 324
Investment Owned, at Fair Value	$ 335	$ 342
Fair Value As A Percentage of Member's Equity	0.90%	1%
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate CORRA
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Environmental & Facilities Services		Environmental & Facilities Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:CanadianOvernightRepoRateAverageMember		whfcl:CanadianOvernightRepoRateAverageMember
Investment, Interest Rate, Floor	0.50%		0.50%
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	12.12%		12.12%
Investment, Acquisition Date	Mar. 23, 2023
Investment Maturity Date	Sep. 28, 2029		Sep. 28, 2029
Investment Owned, at Fair Value	$ 21
Fair Value As A Percentage of Member's Equity	0.10%
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan Interest Rate SONIA
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Environmental & Facilities Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]		whfcl:SolarHoldingsBidcoLimitedFirstLienSecuredTermLoanSoniaMember
Investment, Interest Rate, Floor		0%
Investment, Basis Spread, Variable Rate		6.50%
Investment Interest Rate		11.71%
Investment, Acquisition Date		Mar. 23, 2023
Investment Maturity Date		Sep. 28, 2029
Investment Owned, Balance, Shares | shares		723
Investment Owned, at Cost		$ 882
Investment Owned, at Fair Value		$ 984
Fair Value As A Percentage of Member's Equity		2.80%
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Delayed Draw Loan SOFR One
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Environmental & Facilities Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		0.50%
Investment, Basis Spread, Variable Rate		6.50%
Investment Interest Rate		11.85%
Investment, Acquisition Date		Mar. 23, 2023
Investment Maturity Date		Sep. 28, 2029
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Term Loan CDOR
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SolarHoldingsBidcoLimitedMember	whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Environmental & Facilities Services	Environmental & Facilities Services	Environmental & Facilities Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:CanadianOvernightRepoRateAverageMember	whfcl:CanadianDollarOfferedRateMember	whfcl:CanadianOvernightRepoRateAverageMember
Investment, Interest Rate, Floor	0.50%	0.50%	0.50%
Investment, Basis Spread, Variable Rate	6.75%	6.50%	6.75%
Investment Interest Rate	11.85%	11.94%	11.85%
Investment, Acquisition Date	Mar. 23, 2023	Mar. 23, 2023
Investment Maturity Date	Sep. 28, 2029	Sep. 28, 2029	Sep. 28, 2029
Investment Owned, Balance, Shares | shares		3,873
Investment Owned, Balance, Principal Amount	$ 3,873
Investment Owned, at Cost	2,765	$ 2,759
Investment Owned, at Fair Value	$ 2,830	$ 2,892
Fair Value As A Percentage of Member's Equity	8%	8.30%
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Term Loan SF
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SolarHoldingsBidcoLimitedMember	whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	0.50%	0.50%	0.50%
Investment, Basis Spread, Variable Rate	6.75%	6.50%	6.75%
Investment Interest Rate	12.14%	11.85%	12.14%
Investment, Acquisition Date	Mar. 23, 2023	Mar. 23, 2023
Investment Maturity Date	Sep. 28, 2029	Sep. 28, 2029	Sep. 28, 2029
Investment Owned, Balance, Shares | shares		2,807
Investment Owned, Balance, Principal Amount	$ 2,807
Investment Owned, at Cost	2,750	$ 2,744
Investment Owned, at Fair Value	$ 2,807	$ 2,786
Fair Value As A Percentage of Member's Equity	7.90%	8%
Investment, Identifier [Axis]: Solar Holdings Bidco Limited First Lien Secured Term Loan SONIA
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SolarHoldingsBidcoLimitedMember	whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Environmental & Facilities Services	Environmental & Facilities Services	Environmental & Facilities Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Sterling Overnight Index Average [Member]	whfcl:SolarHoldingsBidcoLimitedFirstLienSecuredTermLoanSoniaMember	Sterling Overnight Index Average [Member]
Investment, Interest Rate, Floor	0%	0%	0%
Investment, Basis Spread, Variable Rate	6.75%	6.50%	6.75%
Investment Interest Rate	12.02%	11.72%	12.02%
Investment, Acquisition Date	Mar. 23, 2023	Mar. 23, 2023
Investment Maturity Date	Sep. 28, 2029	Sep. 28, 2029	Sep. 28, 2029
Investment Owned, Balance, Shares | shares		171
Investment Owned, Balance, Principal Amount	$ 171
Investment Owned, at Cost	205	$ 205
Investment Owned, at Fair Value	$ 216	$ 217
Fair Value As A Percentage of Member's Equity	0.60%	0.60%
Investment, Identifier [Axis]: Solar Holdings Bidco Limited, First Lien Secured Delayed Draw Loan, Interest Rate SOFR
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:SolarHoldingsBidcoLimitedMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Environmental & Facilities Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		0.50%
Investment, Basis Spread, Variable Rate		6.50%
Investment Interest Rate		11.85%
Investment, Acquisition Date		Mar. 23, 2023
Investment Maturity Date		Sep. 28, 2029
Investment Owned, Balance, Shares | shares		368
Investment Owned, at Cost		$ 360
Investment Owned, at Fair Value		$ 366
Fair Value As A Percentage of Member's Equity		1.10%
Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus, 6.50%, Rate 11.92%, Due 7/30/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SourceCodeHoldingsLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.94%		11.94%
Investment, Acquisition Date	Aug. 10, 2021
Investment Maturity Date	Jul. 30, 2027		Jul. 30, 2027
Investment Owned, Balance, Principal Amount	$ 3,893
Investment Owned, at Cost	3,853
Investment Owned, at Fair Value	$ 3,878
Fair Value As A Percentage of Member's Equity	10.90%
Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread SF Plus, 6.50%, Rate 11.96%, Due 7/30/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:SourceCodeHoldingsLLCMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6.50%
Investment Interest Rate		11.96%
Investment, Acquisition Date		Aug. 10, 2021
Investment Maturity Date		Jul. 30, 2027
Investment Owned, Balance, Shares | shares		4,088
Investment Owned, at Cost		$ 4,039
Investment Owned, at Fair Value		$ 4,047
Fair Value As A Percentage of Member's Equity		11.70%
Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus, 6.50%, Rate 11.92%, Due 7/30/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SourceCodeHoldingsLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.50%		6.50%
Investment Interest Rate	11.94%		11.94%
Investment, Acquisition Date	Aug. 10, 2021
Investment Maturity Date	Jul. 30, 2027		Jul. 30, 2027
Investment Owned, Balance, Principal Amount	$ 14,239
Investment Owned, at Cost	14,092
Investment Owned, at Fair Value	$ 14,183
Fair Value As A Percentage of Member's Equity	40.10%
Investment, Identifier [Axis]: Source Code Holdings, LLC., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus, 6.50%, Rate 11.96%, Due 7/30/27
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:SourceCodeHoldingsLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Services
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6.50%
Investment Interest Rate		11.96%
Investment, Acquisition Date		Aug. 10, 2021
Investment Maturity Date		Jul. 30, 2027
Investment Owned, Balance, Shares | shares		14,952
Investment Owned, at Cost		$ 14,772
Investment Owned, at Fair Value		$ 14,806
Fair Value As A Percentage of Member's Equity		42.70%
Investment, Identifier [Axis]: Sterling Pure Blocker, LLC (d/b/a Banner Industries, Inc.) Class B Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SterlingPureBlockerLlcMember	whfcl:SterlingPureBlockerLlcMember
Investment, Type [Extensible Enumeration]	whfcl:ClassBUnitsMember	whfcl:ClassBUnitsMember	whfcl:ClassBUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Construction & Engineering	Construction & Engineering	Construction & Engineering
Investment, Acquisition Date	Dec. 01, 2023	Dec. 01, 2023
Investment Owned, Balance, Principal Amount	$ 404	$ 404
Investment Owned, at Cost	404	404
Investment Owned, at Fair Value	$ 404	$ 404
Percent of net assets	0.10%	0.10%	0.10%
Investment, Identifier [Axis]: StoicLane MidCo, LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:StoiclaneMidcoLlcMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Development
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		7.50%
Investment Interest Rate		13%
Investment, Acquisition Date		Nov. 04, 2022
Investment Maturity Date		Nov. 04, 2027
Investment Owned, Balance, Principal Amount		$ 5,545
Investment Owned, at Cost		5,466
Investment Owned, at Fair Value		$ 5,633
Percent of net assets		1.80%
Investment, Identifier [Axis]: StoicLane MidCo, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:StoiclaneMidcoLlcMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Real Estate Development
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		7.50%
Investment Interest Rate		13%
Investment, Acquisition Date		Nov. 04, 2022
Investment Maturity Date		Nov. 04, 2027
Investment Owned, Balance, Principal Amount		$ 4,606
Investment Owned, at Cost		4,518
Investment Owned, at Fair Value		$ 4,606
Percent of net assets		1.50%
Investment, Identifier [Axis]: Sunless, Inc.., First Lien Secured Revolving Loan, Floor 1.00%, Spread L plus 6.75%, Rate 12.24%, Due 8/13/25
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SunlessInc.Member	whfcl:SunlessInc.Member
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Personal Products	Personal Products	Personal 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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.75%	6.50%
Investment Interest Rate	12.19%	12.21%	12.19%
Investment, Acquisition Date	Oct. 21, 2019	Oct. 21, 2019
Investment Maturity Date	Aug. 13, 2025	Aug. 13, 2025	Aug. 13, 2025
Investment Owned, Balance, Shares | shares		488
Investment Owned, Balance, Principal Amount	$ 887
Investment Owned, at Cost	884	$ 485
Investment Owned, at Fair Value	$ 887	$ 484
Fair Value As A Percentage of Member's Equity	2.50%	1.40%
Investment, Identifier [Axis]: Sunless, Inc.., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.75%, Rate 12.24%, Due 8/13/25
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:SunlessInc.Member	whfcl:SunlessInc.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Personal Products	Personal Products	Personal 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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.75%	6.50%
Investment Interest Rate	12.18%	12.20%	12.18%
Investment, Acquisition Date	Oct. 21, 2019	Oct. 21, 2019
Investment Maturity Date	Aug. 13, 2025	Aug. 13, 2025	Aug. 13, 2025
Investment Owned, Balance, Shares | shares		5,507
Investment Owned, Balance, Principal Amount	$ 4,956
Investment Owned, at Cost	4,926	$ 5,459
Investment Owned, at Fair Value	$ 4,956	$ 5,473
Fair Value As A Percentage of Member's Equity	14%	15.80%
Investment, Identifier [Axis]: TOT Group, Inc. (d/b/a Net Element Inc.) First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Tot Group, Inc. [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	whfcl:TransactionPaymentProcessingServicesMember		whfcl:TransactionPaymentProcessingServicesMember
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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	7.50%		7.50%
Investment Interest Rate	12.83%		12.83%
Investment, Acquisition Date	Jun. 28, 2024
Investment Maturity Date	Jun. 28, 2029		Jun. 28, 2029
Investment, Identifier [Axis]: TOT Group, Inc. (d/b/a Net Element Inc.) First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Tot Group, Inc. [Member]
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	whfcl:TransactionPaymentProcessingServicesMember		whfcl:TransactionPaymentProcessingServicesMember
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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	7.50%		7.50%
Investment Interest Rate	12.83%		12.83%
Investment, Acquisition Date	Jun. 28, 2024
Investment Maturity Date	Jun. 28, 2029		Jun. 28, 2029
Investment, Identifier [Axis]: TOT Group, Inc. (d/b/a Net Element Inc.) First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	Tot Group, Inc. [Member]
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	whfcl:TransactionPaymentProcessingServicesMember		whfcl:TransactionPaymentProcessingServicesMember
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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	7.50%		7.50%
Investment Interest Rate	12.83%		12.83%
Investment, Acquisition Date	Jun. 28, 2024
Investment Maturity Date	Jun. 28, 2029		Jun. 28, 2029
Investment Owned, Balance, Principal Amount	$ 8,239
Investment Owned, at Cost	8,054
Investment Owned, at Fair Value	$ 8,054
Percent of net assets	2.60%		2.60%
Investment, Identifier [Axis]: TOUR Intermediate Holdings., First Lien Secured Delayed Draw Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.96%, Due 5/15/25
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:TOURIntermediateHoldingsLLCMember
Investment, Type [Extensible Enumeration]		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Investment Banking & Brokerage
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6.50%
Investment Interest Rate		11.96%
Investment, Acquisition Date		May 19, 2020
Investment Maturity Date		May 15, 2025
Investment Owned, Balance, Shares | shares		2,320
Investment Owned, at Cost		$ 2,315
Investment Owned, at Fair Value		$ 2,320
Fair Value As A Percentage of Member's Equity		6.70%
Investment, Identifier [Axis]: TOUR Intermediate Holdings., First Lien Secured Term Loan, Floor 1.00%, Spread L plus 6.50%, Rate 11.96%, Due 5/15/25
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:TOURIntermediateHoldingsLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Investment Banking & Brokerage
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		6.50%
Investment Interest Rate		11.96%
Investment, Acquisition Date		May 19, 2020
Investment Maturity Date		May 15, 2025
Investment Owned, Balance, Shares | shares		2,657
Investment Owned, at Cost		$ 2,643
Investment Owned, at Fair Value		$ 2,657
Fair Value As A Percentage of Member's Equity		7.70%
Investment, Identifier [Axis]: Team Car Care Holdings, First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]		whfcl:TeamCarCareHoldingsLLCMember
Investment, Type [Extensible Enumeration]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]		Automotive Retail [Member]
Investment, Variable Interest Rate, Type [Extensible Enumeration]		Base Rate [Member]
Investment, Interest Rate, Floor		1%
Investment, Basis Spread, Variable Rate		7.48%
Investment Interest Rate		13.09%
Investment, Acquisition Date		Feb. 16, 2018
Investment Maturity Date		Dec. 31, 2024
Investment Owned, Balance, Principal Amount		$ 12,407
Investment Owned, at Cost		12,391
Investment Owned, at Fair Value		$ 12,407
Percent of net assets		3.90%
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]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	9.75%	11.75%	9.75%
Investment Interest Rate	15.19%	17.21%	15.19%
Investment, Acquisition Date	Oct. 15, 2020	Oct. 15, 2020
Investment Maturity Date	Oct. 15, 2025	Oct. 15, 2025	Oct. 15, 2025
Investment Owned, Balance, Principal Amount	$ 1,061	$ 1,242
Investment Owned, at Cost	1,053	1,228
Investment Owned, at Fair Value	$ 1,043	$ 1,223
Investment, Interest Rate, Paid in Kind	9.75%		9.75%
Investment, Interest Rate, Paid in Cash	5.44%		5.44%
Percent of net assets	0.30%	0.40%	0.30%
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]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	9.75%	11.75%	9.75%
Investment Interest Rate	15.19%	17.28%	15.19%
Investment, Acquisition Date	Oct. 15, 2020	Oct. 15, 2020
Investment Maturity Date	Oct. 15, 2025	Oct. 15, 2025	Oct. 15, 2025
Investment Owned, Balance, Principal Amount	$ 17,285	$ 15,763
Investment Owned, at Cost	17,153	15,580
Investment Owned, at Fair Value	$ 17,022	$ 15,522
Investment, Interest Rate, Paid in Kind	9.75%		9.75%
Investment, Interest Rate, Paid in Cash	5.44%		5.44%
Percent of net assets	5.40%	4.90%	5.40%
Investment, Identifier [Axis]: The Kyjen Company, LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:TheKyjenCompanyLLCMember	whfcl:TheKyjenCompanyLLCMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]	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%
Investment, Basis Spread, Variable Rate	7.50%	7.50%	7.50%
Investment Interest Rate	12.96%	13.21%	12.96%
Investment, Acquisition Date	Apr. 05, 2021	Apr. 05, 2021
Investment Maturity Date	Apr. 05, 2026	Apr. 05, 2026	Apr. 05, 2026
Investment Owned, at Fair Value	$ (33)	$ (31)
Investment, Interest Rate, Paid in Kind	1%	1%	1%
Investment, Interest Rate, Paid in Cash	11.96%	12.21%	11.96%
Investment, Identifier [Axis]: The Kyjen Company, LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:TheKyjenCompanyLLCMember	whfcl:TheKyjenCompanyLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]	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%
Investment, Basis Spread, Variable Rate	7.50%	7.50%	7.50%
Investment Interest Rate	12.96%	13.21%	12.96%
Investment, Acquisition Date	Apr. 05, 2021	Apr. 05, 2021
Investment Maturity Date	Apr. 05, 2026	Apr. 05, 2026	Apr. 05, 2026
Investment Owned, Balance, Principal Amount	$ 11,358	$ 11,358
Investment Owned, at Cost	11,299	11,282
Investment Owned, at Fair Value	$ 10,903	$ 10,904
Investment, Interest Rate, Paid in Kind	1%	1%	1%
Investment, Interest Rate, Paid in Cash	11.96%	12.21%	11.96%
Percent of net assets	3.50%	3.40%	3.50%
Investment, Identifier [Axis]: Token Buyer, Inc First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:TokenBuyerIncMember	whfcl:TokenBuyerIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	0.50%	0.50%	0.50%
Investment, Basis Spread, Variable Rate	6%	6%	6%
Investment Interest Rate	11.48%	11.53%	11.48%
Investment, Acquisition Date	May 26, 2022	May 26, 2022
Investment Maturity Date	May 31, 2029	May 31, 2029	May 31, 2029
Investment Owned, Balance, Principal Amount	$ 7,106	$ 7,142
Investment Owned, at Cost	6,702	6,695
Investment Owned, at Fair Value	$ 5,402	$ 5,966
Percent of net assets	1.70%	1.90%	1.70%
Investment, Identifier [Axis]: Transervice Holdings, Inc. (d/b/a Transervice Logistics, Inc.) First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:TranserviceHoldingsIncMember	whfcl:TranserviceHoldingsIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	2%	2%	2%
Investment, Basis Spread, Variable Rate	7.50%	7.50%	7.50%
Investment Interest Rate	12.94%	12.96%	12.94%
Investment, Acquisition Date	Jun. 29, 2023	Jun. 29, 2023
Investment Maturity Date	Jun. 29, 2028	Jun. 29, 2028	Jun. 29, 2028
Investment Owned, Balance, Principal Amount	$ 8,775	$ 8,888
Investment Owned, at Cost	8,565	8,648
Investment Owned, at Fair Value	$ 8,819	$ 8,743
Percent of net assets	2.80%	2.80%	2.80%
Investment, Identifier [Axis]: Trimlite Buyer LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:TrimliteBuyerLLCMember	whfcl:TrimliteBuyerLLCMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Building Products	Building Products	Building Products
Investment, Variable Interest Rate, Type [Extensible Enumeration]	whfcl:CanadianDollarOfferedRateMember	whfcl:CanadianDollarOfferedRateMember	whfcl:CanadianDollarOfferedRateMember
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.53%	11.94%	11.53%
Investment, Acquisition Date	Jul. 27, 2021	Jul. 27, 2021
Investment Maturity Date	Jul. 27, 2027	Jul. 27, 2027	Jul. 27, 2027
Investment Owned, Balance, Principal Amount		$ 19,624	$ 18,984
Investment Owned, at Cost	$ 14,988	15,472
Investment Owned, at Fair Value	$ 13,871	$ 14,810
Percent of net assets	4.40%	4.70%	4.40%
Investment, Identifier [Axis]: TriplePoint Acquisition Holdings LLC First Lien Secured Delayed Draw Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:TriplepointAcquisitionHoldingsLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember		whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.83%		10.83%
Investment, Acquisition Date	Jun. 14, 2024
Investment Maturity Date	May 31, 2029		May 31, 2029
Investment, Identifier [Axis]: TriplePoint Acquisition Holdings LLC First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:TriplepointAcquisitionHoldingsLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.83%		10.83%
Investment, Acquisition Date	Jun. 14, 2024
Investment Maturity Date	May 31, 2029		May 31, 2029
Investment, Identifier [Axis]: TriplePoint Acquisition Holdings LLC First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:TriplepointAcquisitionHoldingsLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	5.50%		5.50%
Investment Interest Rate	10.83%		10.83%
Investment, Acquisition Date	Jun. 14, 2024
Investment Maturity Date	May 31, 2029		May 31, 2029
Investment Owned, Balance, Principal Amount	$ 5,376
Investment Owned, at Cost	5,270
Investment Owned, at Fair Value	$ 5,270
Fair Value As A Percentage of Member's Equity	14.90%
Investment, Identifier [Axis]: Turnberry Solutions., First Lien Secured Revolving Loan, Floor 1.00%, Spread SF Plus5.75%, Rate 11.45%, Due 9/2/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:TurnberrySolutionsInc.Member	whfcl:TurnberrySolutionsInc.Member
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember	whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	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
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	5%	5.75%	5%
Investment Interest Rate	11.23%	11.45%	11.23%
Investment, Acquisition Date	Aug. 10, 2021	Aug. 10, 2021
Investment Maturity Date	Sep. 02, 2026	Sep. 02, 2026	Sep. 02, 2026
Investment Owned, at Fair Value	$ 6	$ 2
Investment, Identifier [Axis]: Turnberry Solutions., First Lien Secured Term Loan, Floor 1.00%, Spread SF Plus5.75%, Rate 11.45%, Due 9/2/26
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:TurnberrySolutionsInc.Member	whfcl:TurnberrySolutionsInc.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	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
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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6%	5.75%	6%
Investment Interest Rate	11.23%	11.45%	11.23%
Investment, Acquisition Date	Aug. 10, 2021	Aug. 10, 2021
Investment Maturity Date	Sep. 02, 2026	Sep. 02, 2026	Sep. 02, 2026
Investment Owned, Balance, Shares | shares		6,026
Investment Owned, Balance, Principal Amount	$ 5,995
Investment Owned, at Cost	5,943	$ 5,962
Investment Owned, at Fair Value	$ 5,995	$ 5,979
Fair Value As A Percentage of Member's Equity	16.90%	17.20%
Investment, Identifier [Axis]: Twin Ridge CRS, LP (d/b/a CRS OneSource) Class A Common Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:TwinRidgeCrsLpMember
Investment, Type [Extensible Enumeration]	whfcl:ClassCommonUnitsMember		whfcl:ClassCommonUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Food Distributors		Food Distributors
Investment, Acquisition Date	May 10, 2024
Investment Owned, Balance, Principal Amount	$ 63
Investment Owned, at Cost	317
Investment Owned, at Fair Value	$ 317
Percent of net assets	0.10%		0.10%
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]	whfcl:UsMethanolMidcoLlcMember	whfcl:UsMethanolMidcoLlcMember
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember	whfcl:FirstLienSecuredDelayedDrawLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	8.25%	7.75%	8.25%
Investment Interest Rate	13.74%	13.29%	13.74%
Investment, Acquisition Date	Dec. 20, 2022	Dec. 20, 2022
Investment Maturity Date	Dec. 20, 2027	Dec. 20, 2027	Dec. 20, 2027
Investment Owned, Balance, Principal Amount	$ 9,136	$ 9,540
Investment Owned, at Cost	8,973	9,345
Investment Owned, at Fair Value	$ 9,136	$ 9,449
Investment, Interest Rate, Paid in Kind	13.74%		13.74%
Percent of net assets	2.90%	3%	2.90%
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]	whfcl:UsMethanolMidcoLlcMember	whfcl:UsMethanolMidcoLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	8.25%	7.75%	8.25%
Investment Interest Rate	13.74%	13.28%	13.74%
Investment, Acquisition Date	Dec. 20, 2022	Dec. 20, 2022
Investment Maturity Date	Dec. 20, 2027	Dec. 20, 2027	Dec. 20, 2027
Investment Owned, Balance, Principal Amount	$ 4,993	$ 5,203
Investment Owned, at Cost	4,916	5,111
Investment Owned, at Fair Value	$ 4,993	$ 5,153
Investment, Interest Rate, Paid in Kind	13.74%		13.74%
Percent of net assets	1.60%	1.60%	1.60%
Investment, Identifier [Axis]: UserZoom Technologies, Inc. First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:UserzoomTechnologiesIncMember	whfcl:UserzoomTechnologiesIncMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	7.50%	7.50%	7.50%
Investment Interest Rate	12.81%	12.99%	12.81%
Investment, Acquisition Date	Jan. 12, 2023	Jan. 12, 2023
Investment Maturity Date	Apr. 05, 2029	Apr. 05, 2029	Apr. 05, 2029
Investment Owned, Balance, Principal Amount	$ 9,819	$ 9,819
Investment Owned, at Cost	9,594	9,570
Investment Owned, at Fair Value	$ 9,913	$ 9,719
Percent of net assets	3.20%	3.20%	3.20%
Investment, Identifier [Axis]: Vistria Blocked MGT Investor, LP (d/b/a MGT Consulting Group) Series A Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:VistriaBlockedMgtInvestorLpMember	whfcl:VistriaBlockedMgtInvestorLpMember
Investment, Type [Extensible Enumeration]	whfcl:ClassAUnitsMember	whfcl:SeriesUnitsMember	whfcl:ClassAUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	IT Consulting And Other Services	IT Consulting And Other Services	IT Consulting And Other Services
Investment, Acquisition Date	Apr. 10, 2023	Apr. 10, 2023
Investment Owned, at Cost	$ 314	$ 314
Investment Owned, at Fair Value	$ 524	$ 406
Percent of net assets	0.20%	0.10%	0.20%
Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Equity
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:WHFSTRSOhioSeniorLoanFundLLCMember	whfcl:WHFSTRSOhioSeniorLoanFundLLCMember
Investment, Type [Extensible Enumeration]	Equity Investments	Equity Investments	Equity Investments
Investment Owned, at Fair Value	$ 23,303	$ 22,782			20,160
Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Interests
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:WHFSTRSOhioSeniorLoanFundMember	whfcl:WHFSTRSOhioSeniorLoanFundMember
Investment, Type [Extensible Enumeration]	whfcl:LLCInterestsMember	whfcl:LLCInterestsMember	whfcl:LLCInterestsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Specialized Finance [Member]	Specialized Finance [Member]	Specialized Finance [Member]
Investment, Acquisition Date	Jul. 19, 2019	Jul. 19, 2019
Investment Owned, Balance, Principal Amount	$ 21,104	$ 21,104
Investment Owned, at Cost	21,104	21,104
Investment Owned, at Fair Value	$ 23,303	$ 22,782
Percent of net assets	7.50%	7.20%	7.50%
Investment, Identifier [Axis]: WHF STRS Ohio Senior Loan Fund LLC Subordinated Note
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:WHFSTRSOhioSeniorLoanFundLLCMember	whfcl:WHFSTRSOhioSeniorLoanFundLLCMember
Investment, Type [Extensible Enumeration]	Subordinated Debt [Member]	Subordinated Debt [Member]	Subordinated Debt [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember	srt:NorthAmericaMember	srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	Specialized Finance [Member]	Specialized Finance [Member]	Specialized Finance [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]
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.83%	11.85%	11.83%
Investment, Acquisition Date	Jul. 19, 2019	Jul. 19, 2019
Investment Owned, Balance, Principal Amount	$ 84,416	$ 84,416
Investment Owned, at Cost	84,416	84,416
Investment Owned, at Fair Value	$ 84,416	$ 84,416			$ 80,000
Percent of net assets	27%	26.60%	27%
Investment, Identifier [Axis]: What If Media Group, LLC Common Units
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:WhatIfMediaGroupLLCMember	whfcl:WhatIfMediaGroupLLCMember
Investment, Type [Extensible Enumeration]	whfcl:CommonUnitsMember	whfcl:CommonUnitsMember	whfcl:CommonUnitsMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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	$ 3,081	$ 3,081
Investment Owned, at Cost	851	851
Investment Owned, at Fair Value	$ 1,919	$ 1,615
Percent of net assets	0.60%	0.50%	0.60%
Investment, Identifier [Axis]: Whitestone Home Furnishings, LLC (d/b/a Saatva, Inc.) First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:WhitestoneHomeFurnishingsLlcMember	whfcl:WhitestoneHomeFurnishingsLlcMember
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]	First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%	1%	1%
Investment, Basis Spread, Variable Rate	6.50%	6.50%	6.50%
Investment Interest Rate	11.94%	11.96%	11.94%
Investment, Acquisition Date	Nov. 06, 2023	Nov. 06, 2023
Investment Maturity Date	Aug. 20, 2026	Aug. 20, 2026	Aug. 20, 2026
Investment Owned, Balance, Principal Amount	$ 2,960	$ 2,990
Investment Owned, at Cost	2,903	2,919
Investment Owned, at Fair Value	$ 2,948	$ 2,919
Percent of net assets	0.90%	0.90%	0.90%
Investment, Identifier [Axis]: Zephyr Buyer, L.P. (d/b/a The Weather Company, LLC) First Lien Secured Revolving Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ZephyrBuyerL.p.Member
Investment, Type [Extensible Enumeration]	whfcl:FirstLienSecuredRevolvingLoanMember		whfcl:FirstLienSecuredRevolvingLoanMember
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	12.08%		12.08%
Investment, Acquisition Date	Jan. 31, 2024
Investment Maturity Date	Jan. 31, 2030		Jan. 31, 2030
Investment Owned, at Fair Value	$ 13
Investment, Identifier [Axis]: Zephyr Buyer, L.P. (d/b/a The Weather Company, LLC) First Lien Secured Term Loan
Schedule of Investments [Line Items]
Investment, Issuer Name [Extensible Enumeration]	whfcl:ZephyrBuyerL.p.Member
Investment, Type [Extensible Enumeration]	First Lien Secured Term Loan [Member]		First Lien Secured Term Loan [Member]
Investment, Issuer Geographic Region [Extensible Enumeration]	srt:NorthAmericaMember		srt:NorthAmericaMember
Investment, Industry Sector [Extensible Enumeration]	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]
Investment, Interest Rate, Floor	1%		1%
Investment, Basis Spread, Variable Rate	6.75%		6.75%
Investment Interest Rate	12.08%		12.08%
Investment, Acquisition Date	Jan. 31, 2024
Investment Maturity Date	Jan. 31, 2030		Jan. 31, 2030
Investment Owned, Balance, Principal Amount	$ 14,158
Investment Owned, at Cost	13,829
Investment Owned, at Fair Value	$ 13,934
Percent of net assets	4.50%		4.50%

INVESTMENTS - Superscript (Deta

INVESTMENTS - Superscript (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Schedule of Investments [Line Items]
STRS JV's portfolio company investments as a percentage of members' equity	211.10%	219.70%
Investments	$ 660,005	$ 696,168
STRS JV
Schedule of Investments [Line Items]
STRS JV's portfolio company investments as a percentage of members' equity	916%	900.60%
STRS JV's portfolio company investments as a percentage of total assets	94.20%	94%
Outstanding commitments to fund investments	$ 25,266	$ 21,063
Investments	$ 324,844	$ 312,217

INVESTMENTS - Forward Currency

INVESTMENTS - Forward Currency Contracts (Details) € in Thousands, £ in Thousands, $ in Thousands, $ in Thousands	Jun. 30, 2024 USD ($)	Jun. 30, 2024 CAD ($)	Jun. 30, 2024 EUR (€)	Jun. 30, 2024 GBP (£)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 EUR (€)	Dec. 31, 2023 GBP (£)
Schedule of Investments [Line Items]
Net Amount of Derivative Liabilities	$ 7				$ 43
Open Forward Foreign Currency Contract, Identifier [Axis]: Forward Currency Contracts, Morgan Stanley, CAD, Settlement Date 2/7/2024
Schedule of Investments [Line Items]
Currency to be sold					958
Currency to be purchased					691
Net Amount of Derivative Liabilities					33
Open Forward Foreign Currency Contract, Identifier [Axis]: Forward Currency Contracts, Morgan Stanley, CAD, Settlement Date 5/8/24
Schedule of Investments [Line Items]
Currency to be sold		$ 216
Currency to be purchased	157
Net Amount of Derivative Liabilities	1
Open Forward Foreign Currency Contract, Identifier [Axis]: Forward Currency Contracts, Morgan Stanley, EUR, Settlement Date 2/7/2024
Schedule of Investments [Line Items]
Currency to be sold | €						€ 1,181
Currency to be purchased					1,249
Net Amount of Derivative Liabilities					56
Open Forward Foreign Currency Contract, Identifier [Axis]: Forward Currency Contracts, Morgan Stanley, EUR, Settlement Date 5/8/24
Schedule of Investments [Line Items]
Currency to be sold | €			€ 1,308
Currency to be purchased	1,402
Net Amount of Derivative Liabilities	2
Open Forward Foreign Currency Contract, Identifier [Axis]: Forward Currency Contracts, Morgan Stanley, GBP, Settlement Date 2/7/2024
Schedule of Investments [Line Items]
Currency to be sold | £							£ 1,340
Currency to be purchased					1,625
Net Amount of Derivative Liabilities					83
Open Forward Foreign Currency Contract, Identifier [Axis]: Forward Currency Contracts, Morgan Stanley, GBP, Settlement Date 5/8/24
Schedule of Investments [Line Items]
Currency to be sold | £				£ 1,564
Currency to be purchased	3,857
Net Amount of Derivative Liabilities	26
STRS JV
Schedule of Investments [Line Items]
Net Amount of Derivative Liabilities	$ 29				$ 172

INVESTMENTS - Selected Balance

INVESTMENTS - Selected Balance Sheet Information For STRS JV (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Assets
Investments	$ 660,005	$ 696,168
Cash and cash equivalents	12,853	10,749	$ 10,412
Total assets	703,183	730,751
Liabilities
Credit facility	358,896
Interest payable on credit facility	1,910	2,069
Total liabilities	390,501	413,979
Total liabilities and total net assets	703,183	730,751
Investments, amortized cost	704,521	740,021
Unamortized debt issuance costs	3,720	4,564
STRS JV
Assets
Investments	324,844	312,217
Cash and cash equivalents	16,711	14,625
Interest receivable	3,204	2,540
Amount receivable on unsettled investment transactions	194	2,687
Other assets	54	91
Total assets	345,007	332,160
Liabilities
Credit facility	175,441	163,394
Note payable to members	128,459	128,459
Interest payable on credit facility	1,014	1,013
Interest payable on notes to members	3,797	3,799
Unrealized depreciation on foreign currency forward contracts	28	172
Other liabilities	806	657
Total liabilities	309,545	297,494
Members' equity	35,462	34,666
Total liabilities and total net assets	345,007	332,160
Investments, amortized cost	324,993	312,807
Unamortized debt issuance costs	$ 2,345	$ 1,850

INVESTMENTS - Selected Statemen

INVESTMENTS - Selected Statement of Operations Information For STRS JV (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Schedule of Investments [Line Items]
Total investment income	$ 23,482	$ 25,595	$ 48,957	$ 51,759
Administrative service fees	170	170	341	341
Total expenses	13,923	14,753	28,291	29,963
Net investment income after excise tax	9,292	10,592	20,107	21,296
Net increase in net assets resulting from operations	7,839	3,881	13,808	11,387
STRS JV
Schedule of Investments [Line Items]
Interest and fee income	10,107	9,757	20,197	18,452
Total investment income	10,107	9,757	20,197	18,452
Interest expense on credit facility	3,688	3,671	7,444	6,667
Interest expense on notes to members	3,797	3,542	7,597	6,870
Administrative service fees	165	165	327	320
Other expenses	139	151	355	350
Total expenses	7,789	7,529	15,723	14,207
Net investment income after excise tax	2,318	2,228	4,474	4,245
Net realized gains (losses) on investments and foreign currency transactions	61	28	(51)	87
Net change in unrealized appreciation (depreciation) on investments and foreign currency transactions	834	136	2,021	706
Net increase in net assets resulting from operations	$ 3,213	$ 2,392	$ 6,444	$ 5,038

FAIR VALUE MEASUREMENTS (Detail

FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
FAIR VALUE MEASUREMENTS
Investments	$ 660,005	$ 696,168
First lien secured loans
FAIR VALUE MEASUREMENTS
Investments	522,943	555,878
Second lien secured loans
FAIR VALUE MEASUREMENTS
Investments	5,002	16,246
Unsecured loans
FAIR VALUE MEASUREMENTS
Investments	1,261	167
Subordinated Note to STRS JV
FAIR VALUE MEASUREMENTS
Investments	84,416	84,416
Equity (excluding STRS JV)
FAIR VALUE MEASUREMENTS
Investments	23,080	16,679
Equity in STRS JV
FAIR VALUE MEASUREMENTS
Investments	23,303	22,782
Level 1
FAIR VALUE MEASUREMENTS
Money Market Fair Value	14,329	11,312
Level 2 | Foreign currency forward contracts
FAIR VALUE MEASUREMENTS
Investments	7	(43)
Level 3
FAIR VALUE MEASUREMENTS
Investments	636,702	673,386
Level 3 | First lien secured loans
FAIR VALUE MEASUREMENTS
Investments	522,943	555,878
Level 3 | Second lien secured loans
FAIR VALUE MEASUREMENTS
Investments	5,002	16,246
Level 3 | Unsecured loans
FAIR VALUE MEASUREMENTS
Investments	1,261	167
Level 3 | Subordinated Note to STRS JV
FAIR VALUE MEASUREMENTS
Investments	84,416	84,416
Level 3 | Equity (excluding STRS JV)
FAIR VALUE MEASUREMENTS
Investments	$ 23,080	$ 16,679

FAIR VALUE MEASUREMENTS - Level

FAIR VALUE MEASUREMENTS - Level 3 Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Fair value measurements
Fair value, beginning of period	$ 675,261	$ 728,910	$ 673,386	$ 740,068
Funding of investments	58,240	29,390	116,442	66,729
Non-cash interest income	1,834	1,687	3,866	3,668
Accretion of discount	785	969	1,901	2,070
Proceeds from paydowns and sales	(97,021)	(46,989)	(151,350)	(94,801)
Realized gains (losses)	$ (212)	$ (344)	$ (6,360)	$ (439)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Gain (Loss) on Sale of Investments	Gain (Loss) on Sale of Investments	Gain (Loss) on Sale of Investments	Gain (Loss) on Sale of Investments
Net unrealized appreciation (depreciation)	$ (2,185)	$ (6,200)	$ (1,183)	$ (9,872)
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)	Debt and Equity Securities, Unrealized Gain (Loss)	Debt and Equity Securities, Unrealized Gain (Loss)	Debt and Equity Securities, Unrealized Gain (Loss)
Fair value, end of period	$ 636,702	$ 707,423	$ 636,702	$ 707,423
Change in unrealized appreciation (depreciation) on investments still held	(2,235)	(7,930)	(19,050)	(11,371)
First lien secured loans
Fair value measurements
Fair value, beginning of period	562,269	608,477	555,878	618,267
Funding of investments	57,915	27,136	116,000	64,474
Non-cash interest income	1,808	1,687	3,824	3,668
Accretion of discount	782	947	1,882	2,027
Proceeds from paydowns and sales	(97,021)	(40,384)	(149,310)	(88,196)
Conversions		(3,892)	(8,852)	(4,537)
Realized gains (losses)	(212)	(5)	(543)	(100)
Net unrealized appreciation (depreciation)	(2,598)	(1,066)	4,064	(2,703)
Fair value, end of period	522,943	592,900	522,943	592,900
Change in unrealized appreciation (depreciation) on investments still held	(2,651)	(1,986)	(5,534)	(3,638)
Second lien secured loans
Fair value measurements
Fair value, beginning of period	4,948	19,773	16,246	20,634
Accretion of discount	2	22	17	43
Proceeds from paydowns and sales			(2,040)
Conversions			(11,769)
Realized gains (losses)			(5,817)
Net unrealized appreciation (depreciation)	52	(2,663)	8,365	(3,545)
Fair value, end of period	5,002	17,132	5,002	17,132
Change in unrealized appreciation (depreciation) on investments still held	51	(2,663)	96	(3,545)
Unsecured Loans
Fair value measurements
Fair value, beginning of period	1,239	167	167	167
Non-cash interest income	26		42
Accretion of discount	1		2
Conversions			1,053
Net unrealized appreciation (depreciation)	(5)		(3)
Fair value, end of period	1,261	167	1,261	167
Change in unrealized appreciation (depreciation) on investments still held	(4)		(3)
Subordinated Note to STRS JV
Fair value measurements
Fair value, beginning of period	84,416	80,000	84,416	80,000
Funding of investments		1,472		1,472
Fair value, end of period	84,416	81,472	84,416	81,472
Equity (excluding STRS JV)
Fair value measurements
Fair value, beginning of period	22,389	20,493	16,679	21,000
Funding of investments	325	782	442	783
Proceeds from paydowns and sales		(6,605)		(6,605)
Conversions		3,892	19,568	4,537
Realized gains (losses)		(339)		(339)
Net unrealized appreciation (depreciation)	366	(2,471)	(13,609)	(3,624)
Fair value, end of period	23,080	15,752	23,080	15,752
Change in unrealized appreciation (depreciation) on investments still held	$ 369	$ (3,281)	$ (13,609)	$ (4,188)

FAIR VALUE MEASUREMENTS - Quant

FAIR VALUE MEASUREMENTS - Quantitative information (Details) $ in Thousands	Jun. 30, 2024 USD ($) $ / shares	Dec. 31, 2023 USD ($) $ / shares
FAIR VALUE MEASUREMENTS
Investments	$ 660,005	$ 696,168
First lien secured loans
FAIR VALUE MEASUREMENTS
Investments	522,943	555,878
Second lien secured loans
FAIR VALUE MEASUREMENTS
Investments	5,002	16,246
Subordinated unsecured loans
FAIR VALUE MEASUREMENTS
Investments	1,261	167
Subordinated Notes
FAIR VALUE MEASUREMENTS
Investments	1,261	167
Subordinated Note to STRS JV
FAIR VALUE MEASUREMENTS
Investments	84,416	84,416
Level 3
FAIR VALUE MEASUREMENTS
Investments	636,702	673,386
Level 3 | First lien secured loans
FAIR VALUE MEASUREMENTS
Investments	522,943	555,878
Level 3 | First lien secured loans | Discounted cash flows
FAIR VALUE MEASUREMENTS
Investments	$ 465,887	$ 510,739
Level 3 | First lien secured loans | Discounted cash flows | Discount rate | Minimum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.094	0.110
Level 3 | First lien secured loans | Discounted cash flows | Discount rate | Maximum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.241	0.303
Level 3 | First lien secured loans | Discounted cash flows | Discount rate | Weighted average
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	(0.144)	(0.139)
Level 3 | First lien secured loans | Option pricing model
FAIR VALUE MEASUREMENTS
Investments	$ 917	$ 646
Level 3 | First lien secured loans | Option pricing model | Volatility | Minimum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.140	0.172
Level 3 | First lien secured loans | Option pricing model | Volatility | Maximum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.186	0.172
Level 3 | First lien secured loans | Option pricing model | Volatility | Weighted average
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	(0.166)	(0.172)
Level 3 | First lien secured loans | Recent transaction
FAIR VALUE MEASUREMENTS
Investments	$ 24,335	$ 34,016
Level 3 | First lien secured loans | Recent transaction | Transaction price | Minimum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input | $ / shares	97	89
Level 3 | First lien secured loans | Recent transaction | Transaction price | Maximum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input | $ / shares	100	98.8
Level 3 | First lien secured loans | Recent transaction | Transaction price | Weighted average
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	(0.981)	(96.2)
Level 3 | First lien secured loans | Expected repayment
FAIR VALUE MEASUREMENTS
Investments	$ 13,154
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	1.016
Level 3 | First lien secured loans | Expected repayment | Transaction price | Weighted average
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	(1.006)
Level 3 | First lien secured loans | Enterprise value analysis
FAIR VALUE MEASUREMENTS
Investments		$ 10,477
Level 3 | First lien secured loans | Enterprise value analysis | EBITDA Multiple Range
FAIR VALUE MEASUREMENTS
Investments	$ 17,626
Level 3 | First lien secured loans | Enterprise value analysis | EBITDA Multiple Range | Minimum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	4.1	8.6
Level 3 | First lien secured loans | Enterprise value analysis | EBITDA Multiple Range | Maximum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	7.6	8.6
Level 3 | First lien secured loans | Enterprise value analysis | EBITDA Multiple Range | Weighted average
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	(0.071)	(8.6)
Level 3 | First lien secured loans | Enterprise value analysis | Revenue Multiple
FAIR VALUE MEASUREMENTS
Investments	$ 1,024
Level 3 | First lien secured loans | Enterprise value analysis | Revenue Multiple | Minimum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.009
Level 3 | First lien secured loans | Enterprise value analysis | Revenue Multiple | Maximum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.009
Level 3 | First lien secured loans | Enterprise value analysis | Revenue Multiple | Weighted average
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	(0.009)
Level 3 | Second lien secured loans
FAIR VALUE MEASUREMENTS
Investments	$ 5,002	$ 16,246
Level 3 | Second lien secured loans | Discounted cash flows
FAIR VALUE MEASUREMENTS
Investments	$ 5,002	$ 14,645
Level 3 | Second lien secured loans | Discounted cash flows | Discount rate | Minimum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.131	0.126
Level 3 | Second lien secured loans | Discounted cash flows | Discount rate | Maximum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.131	0.240
Level 3 | Second lien secured loans | Discounted cash flows | Discount rate | Weighted average
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	(0.131)	(0.202)
Level 3 | Second lien secured loans | Enterprise value analysis
FAIR VALUE MEASUREMENTS
Investments		$ 1,601
Level 3 | Second lien secured loans | Enterprise value analysis | EBITDA Multiple Range | Minimum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.063
Level 3 | Second lien secured loans | Enterprise value analysis | EBITDA Multiple Range | Maximum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.063
Level 3 | Second lien secured loans | Enterprise value analysis | EBITDA Multiple Range | Weighted average
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	(0.063)
Level 3 | Subordinated unsecured loans
FAIR VALUE MEASUREMENTS
Investments	$ 1,261	167
Level 3 | Subordinated unsecured loans | Discounted cash flows
FAIR VALUE MEASUREMENTS
Investments	$ 1,261
Level 3 | Subordinated unsecured loans | Discounted cash flows | Discount rate | Minimum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.103
Level 3 | Subordinated unsecured loans | Discounted cash flows | Discount rate | Maximum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.154
Level 3 | Subordinated unsecured loans | Discounted cash flows | Discount rate | Weighted average
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	(0.148)
Level 3 | Subordinated unsecured loans | Enterprise value analysis
FAIR VALUE MEASUREMENTS
Investments		$ 167
Level 3 | Subordinated unsecured loans | Enterprise value analysis | EBITDA Multiple Range | Minimum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input		0.071
Level 3 | Subordinated unsecured loans | Enterprise value analysis | EBITDA Multiple Range | Maximum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input		0.071
Level 3 | Subordinated unsecured loans | Enterprise value analysis | EBITDA Multiple Range | Weighted average
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input		(0.071)
Level 3 | Subordinated Note to STRS JV
FAIR VALUE MEASUREMENTS
Investments	$ 84,416	$ 84,416
Level 3 | Subordinated Note to STRS JV | Enterprise value analysis
FAIR VALUE MEASUREMENTS
Investments	84,416	84,416
Level 3 | Preferred Equity | Discounted cash flows
FAIR VALUE MEASUREMENTS
Investments	$ 648	$ 832
Level 3 | Preferred Equity | Discounted cash flows | Discount rate | Minimum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.224	29.9
Level 3 | Preferred Equity | Discounted cash flows | Discount rate | Maximum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.224	30.3
Level 3 | Preferred Equity | Discounted cash flows | Discount rate | Weighted average
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	(0.224)	(29.9)
Level 3 | Preferred Equity | Enterprise value analysis
FAIR VALUE MEASUREMENTS
Investments		$ 1,511
Level 3 | Preferred Equity | Enterprise value analysis | EBITDA Multiple Range
FAIR VALUE MEASUREMENTS
Investments	$ 405
Level 3 | Preferred Equity | Enterprise value analysis | EBITDA Multiple Range | Minimum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	6	6
Level 3 | Preferred Equity | Enterprise value analysis | EBITDA Multiple Range | Maximum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	10.5	10.5
Level 3 | Preferred Equity | Enterprise value analysis | EBITDA Multiple Range | Weighted average
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	(8.5)	(6.7)
Level 3 | Preferred Equity | Enterprise value analysis | Revenue Multiple
FAIR VALUE MEASUREMENTS
Investments	$ 1,088
Level 3 | Preferred Equity | Enterprise value analysis | Revenue Multiple | Minimum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.009
Level 3 | Preferred Equity | Enterprise value analysis | Revenue Multiple | Maximum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.009
Level 3 | Preferred Equity | Enterprise value analysis | Revenue Multiple | Weighted average
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	(0.009)
Level 3 | Common Equity | Discounted cash flows
FAIR VALUE MEASUREMENTS
Investments	$ 2,547	$ 3,175
Level 3 | Common Equity | Discounted cash flows | Discount rate | Minimum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.159	14.7
Level 3 | Common Equity | Discounted cash flows | Discount rate | Maximum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.205	30.3
Level 3 | Common Equity | Discounted cash flows | Discount rate | Weighted average
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	(0.168)	(16.6)
Level 3 | Common Equity | Recent transaction
FAIR VALUE MEASUREMENTS
Investments	$ 865	$ 709
Level 3 | Common Equity | Recent transaction | Transaction price | Minimum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.050	1
Level 3 | Common Equity | Recent transaction | Transaction price | Maximum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.050	1
Level 3 | Common Equity | Recent transaction | Transaction price | Weighted average
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	(0.018)	(1)
Level 3 | Common Equity | Enterprise value analysis
FAIR VALUE MEASUREMENTS
Investments	$ 8,050	$ 6,927
Level 3 | Common Equity | Enterprise value analysis | EBITDA Multiple Range | Minimum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	5.5	0.055
Level 3 | Common Equity | Enterprise value analysis | EBITDA Multiple Range | Maximum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	13.3	0.132
Level 3 | Common Equity | Enterprise value analysis | EBITDA Multiple Range | Weighted average
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	(9.2)	(0.088)
Level 3 | Common Equity | Enterprise value analysis | Revenue Multiple
FAIR VALUE MEASUREMENTS
Investments	$ 9,409
Level 3 | Common Equity | Enterprise value analysis | Revenue Multiple | Minimum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.009
Level 3 | Common Equity | Enterprise value analysis | Revenue Multiple | Maximum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.018
Level 3 | Common Equity | Enterprise value analysis | Revenue Multiple | Weighted average
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	(0.018)
Level 3 | Warrant | Discounted cash flows
FAIR VALUE MEASUREMENTS
Investments	$ 68	$ 3,525
Level 3 | Warrant | Discounted cash flows | Discount rate | Minimum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.205	0.262
Level 3 | Warrant | Discounted cash flows | Discount rate | Maximum
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	0.205	0.302
Level 3 | Warrant | Discounted cash flows | Discount rate | Weighted average
FAIR VALUE MEASUREMENTS
Investments Owned, Measurement Input	(0.205)	(0.263)

FAIR VALUE MEASUREMENTS - Borro

FAIR VALUE MEASUREMENTS - Borrowings (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023	Aug. 31, 2023	Aug. 24, 2023	Aug. 07, 2023	Dec. 06, 2021	Nov. 24, 2021	Dec. 04, 2020	Oct. 20, 2020	Jul. 13, 2018
6.000% 2023 Notes
FAIR VALUE MEASUREMENTS
Interest rate (as a percent)					6%					6%
5.375% 2025 Notes
FAIR VALUE MEASUREMENTS
Interest rate (as a percent)	5.375%	5.375%							5.375%
5.375% 2026 Notes
FAIR VALUE MEASUREMENTS
Interest rate (as a percent)	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%
4.250% 2028 Notes
FAIR VALUE MEASUREMENTS
Interest rate (as a percent)	4.25%	4.25%				4.25%
7.875% 2028 Notes
FAIR VALUE MEASUREMENTS
Interest rate (as a percent)	7.875%	7.875%	7.875%	7.875%
Level 3
FAIR VALUE MEASUREMENTS
Principal Amount Outstanding	$ 362,616	$ 391,012
Fair Value, Debt	347,205	375,176
Level 3 | JPM Credit Facility
FAIR VALUE MEASUREMENTS
Principal Amount Outstanding	168,116	196,512
Fair Value, Debt	166,949	194,926
Level 3 | 5.375% 2025 Notes
FAIR VALUE MEASUREMENTS
Principal Amount Outstanding	40,000	40,000
Fair Value, Debt	38,557	38,369
Level 3 | 5.375% 2026 Notes
FAIR VALUE MEASUREMENTS
Principal Amount Outstanding	10,000	10,000
Fair Value, Debt	9,356	9,365
Level 3 | 4.000% 2026 Notes
FAIR VALUE MEASUREMENTS
Principal Amount Outstanding	75,000	75,000
Fair Value, Debt	67,866	67,511
Level 3 | 5.625% 2027 Notes
FAIR VALUE MEASUREMENTS
Principal Amount Outstanding	10,000	10,000
Fair Value, Debt	9,199	9,261
Level 3 | 4.250% 2028 Notes
FAIR VALUE MEASUREMENTS
Principal Amount Outstanding	25,000	25,000
Fair Value, Debt	21,257	21,379
Level 3 | 7.875% 2028 Notes
FAIR VALUE MEASUREMENTS
Principal Amount Outstanding	34,500	34,500
Fair Value, Debt	$ 34,021	$ 34,365

BORROWINGS - Outstanding and Av

BORROWINGS - Outstanding and Available (Details) - USD ($) $ in Thousands			6 Months Ended	12 Months Ended
	Apr. 12, 2023	Feb. 04, 2022	Jun. 30, 2024	Dec. 31, 2023	Aug. 31, 2023	Aug. 24, 2023	Mar. 30, 2022	Feb. 03, 2022	Dec. 06, 2021	Nov. 24, 2021	Dec. 04, 2020	Oct. 20, 2020
Debt Instrument
Principal Amount Outstanding			$ 362,616	$ 391,012
Amortized Cost			358,896	386,448
Available			166,884	138,488
JPM Credit Facility
Debt Instrument
Principal Amount Outstanding			168,116	196,512
Amortized Cost			166,949	194,926
Available		$ 310,000	$ 166,884	$ 138,488			$ 335,000	$ 285,000
JPM Credit Facility | SOFR
Debt Instrument
Variable interest rate (as a percent)	2.50%	2.50%	2.50%	2.50%
5.375% 2025 Notes
Debt Instrument
Principal Amount Outstanding			$ 40,000	$ 40,000								$ 40,000
Amortized Cost			$ 39,826	$ 39,761
Interest rate (as a percent)			5.375%	5.375%								5.375%
5.375% 2026 Notes
Debt Instrument
Principal Amount Outstanding			$ 10,000	$ 10,000							$ 10,000
Amortized Cost			$ 9,929	$ 9,914
Interest rate (as a percent)			5.375%	5.375%							5.375%
4.000% 2026 Notes
Debt Instrument
Principal Amount Outstanding			$ 75,000	$ 75,000						$ 75,000
Amortized Cost			$ 74,162	$ 73,992
Interest rate (as a percent)			4%	4%						4%
5.625% 2027 Notes
Debt Instrument
Principal Amount Outstanding			$ 10,000	$ 10,000							$ 10,000
Amortized Cost			$ 9,914	$ 9,901
Interest rate (as a percent)			5.625%	5.625%							5.625%
4.250% 2028 Notes
Debt Instrument
Principal Amount Outstanding			$ 25,000	$ 25,000					$ 25,000
Amortized Cost			$ 24,770	$ 24,745
Interest rate (as a percent)			4.25%	4.25%					4.25%
7.875% 2028 Notes
Debt Instrument
Principal Amount Outstanding			$ 34,500	$ 34,500	$ 34,500	$ 30,000
Amortized Cost			$ 33,346	$ 33,209
Interest rate (as a percent)			7.875%	7.875%	7.875%	7.875%

BORROWINGS - Narratives (Detail

BORROWINGS - Narratives (Details) $ in Thousands								3 Months Ended	6 Months Ended	12 Months Ended
	Apr. 12, 2023 USD ($)	Feb. 04, 2022 USD ($)	Jan. 04, 2022 USD ($)	Oct. 04, 2021 USD ($)	Jul. 15, 2021	Aug. 02, 2018	Aug. 01, 2018	Jun. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Mar. 30, 2022 USD ($)	Feb. 03, 2022 USD ($)
Debt Instrument
Percentage of asset coverage for borrowed amounts									186.20%	181%
Available								$ 166,884	$ 166,884	$ 138,488
Minimum
Debt Instrument
Maximum debt-to-equity ratio								1	1
Debt outstanding for each dollar of equity									$ 1
Value of equity for Each Dollar of Debt									$ 1
Asset coverage ratio						150%	150%
Maximum
Debt Instrument
Maximum debt-to-equity ratio								2	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
Increase in credit facility size		$ 25,000
Maximum borrowing limit		335,000
Available		310,000						$ 166,884	166,884	138,488	$ 335,000	$ 285,000
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	$ 200,000
Fair value of securities pledged as collateral								529,071	529,071
Amount undrawn under the credit facility								166,884	166,884	138,488
Principal Amount Outstanding										196,512
Weighted average outstanding borrowings								$ 191,466	$ 197,486	$ 236,969
Effective interest rate (as a percent)								7.81%	7.81%	7.87%
Interest rate over time								7.82%	7.83%	7.58%
JPM Credit Facility | Maximum
Debt Instrument
Maximum borrowing limit											$ 375,000
JPM Credit Facility | LIBOR
Debt Instrument
Variable interest rate (as a percent)					2.35%
JPM Credit Facility | SOFR
Debt Instrument
Variable interest rate (as a percent)	2.50%	2.50%							2.50%	2.50%
JPM Credit Facility | Base Rate
Debt Instrument
Variable interest rate (as a percent)	2.50%
JPM Credit Facility | SONIA
Debt Instrument
Variable interest rate (as a percent)	2.35%

BORROWINGS - Notes (Details)

BORROWINGS - Notes (Details) - USD ($) $ in Thousands	Aug. 31, 2023	Jun. 30, 2024	Dec. 31, 2023	Aug. 24, 2023	Aug. 07, 2023	Dec. 06, 2021	Nov. 24, 2021	Dec. 04, 2020	Oct. 20, 2020	Jul. 13, 2018
Debt Instrument
Principal Amount Outstanding		$ 362,616	$ 391,012
5.375% 2025 Notes
Debt Instrument
Principal Amount Outstanding		$ 40,000	$ 40,000						$ 40,000
Interest rate (as a percent)		5.375%	5.375%						5.375%
5.375% 2025 Notes | Maximum
Debt Instrument
Interest rate (as a percent)									6.375%
5.375% 2026 Notes
Debt Instrument
Principal Amount Outstanding		$ 10,000	$ 10,000					$ 10,000
Interest rate (as a percent)		5.375%	5.375%					5.375%
5.375% 2026 Notes | Maximum
Debt Instrument
Interest rate (as a percent)								6.375%
4.000% 2026 Notes
Debt Instrument
Principal Amount Outstanding		$ 75,000	$ 75,000				$ 75,000
Interest rate (as a percent)		4%	4%				4%
5.625% 2027 Notes
Debt Instrument
Principal Amount Outstanding		$ 10,000	$ 10,000					$ 10,000
Interest rate (as a percent)		5.625%	5.625%					5.625%
5.625% 2027 Notes | Maximum
Debt Instrument
Interest rate (as a percent)								6.625%
4.250% 2028 Notes
Debt Instrument
Principal Amount Outstanding		$ 25,000	$ 25,000			$ 25,000
Interest rate (as a percent)		4.25%	4.25%			4.25%
4.250% 2028 Notes | Maximum
Debt Instrument
Interest rate (as a percent)						5.25%
7.875% 2028 Notes
Debt Instrument
Principal Amount Outstanding	$ 34,500	$ 34,500	$ 34,500	$ 30,000
Option to purchase an additional principal amount	$ 4,500
Interest rate (as a percent)	7.875%	7.875%	7.875%	7.875%
7.875% 2028 Notes | Maximum
Debt Instrument
Principal Amount Outstanding				$ 4,500
6.000% 2023 Notes
Debt Instrument
Principal Amount Outstanding										$ 30,000
Interest rate (as a percent)					6%					6%
6.000% 2023 Notes | Maximum
Debt Instrument
Interest rate (as a percent)										6.50%

RELATED PARTY TRANSACTIONS - (D

RELATED PARTY TRANSACTIONS - (Details) - Investment Advisory Agreement - item		6 Months Ended	12 Months Ended
	Jan. 01, 2024	Jun. 30, 2024	Dec. 31, 2023
RELATED PARTY TRANSACTIONS
Agreement may be terminated by either party without penalty upon days		60 days
Percentage of base management fee on gross assets	1.75%		2%
Percentage of base management fee on gross assets if value exceeded total assets	1.25%		1.25%
Threshold percentage for calculation of base management fee	200%		200%
Number of calendar quarters	2		2

RELATED PARTY TRANSACTIONS - Ba

RELATED PARTY TRANSACTIONS - Base management fee (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
RELATED PARTY TRANSACTIONS
Base management fee	$ 3,065	$ 3,705	$ 6,182	$ 7,416
Total management fees	3,065	$ 3,705	6,182	$ 7,416
Management fees payable	$ 3,065		$ 3,065		$ 3,595

RELATED PARTY TRANSACTIONS - Pe

RELATED PARTY TRANSACTIONS - Performance-based incentive fee (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) component	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
RELATED PARTY TRANSACTIONS
Number of components | component			2
Incentive fee payables	$ 14,630		$ 14,630		$ 10,470
Income incentive fee	2,323	$ 2,648	5,026	$ 5,324
Total performance-based incentive fees	2,323	$ 2,648	5,026	$ 5,324
Capital Gains Incentive Fees under GAAP
RELATED PARTY TRANSACTIONS
Incentive fee payables	0		$ 0		$ 0
Investment adviser
RELATED PARTY TRANSACTIONS
Number of components | component			2
Incentive fee payables	$ 0		$ 0

RELATED PARTY TRANSACTIONS - Ad

RELATED PARTY TRANSACTIONS - Administration , Coinvestment and STRS JV (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
RELATED PARTY TRANSACTIONS
Administrative service fees	$ 170	$ 170	$ 341	$ 341
Net realized losses			$ (5,728)	(3)
Administration Agreement
RELATED PARTY TRANSACTIONS
Agreement may be terminated by either party without penalty upon days			60 days
Administrative service fees	170	170	$ 341	341
Administration Agreement | White Horse Advisers
RELATED PARTY TRANSACTIONS
Other liabilities	5,645,610		5,645,610		$ 4,977,275
Administration Agreement | STRS JV
RELATED PARTY TRANSACTIONS
Proceeds from sale of investments	21,988	12,555	30,466	38,473
Net realized losses	$ 2	$ 2	$ 2	$ 98

COMMITMENTS AND CONTINGENCIES -

COMMITMENTS AND CONTINGENCIES - Unfunded commitments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Unfunded commitments
Total Unfunded Commitments	$ 24,689	$ 21,440
Revolving Loan Commitments
Unfunded commitments
Total Unfunded Commitments	14,376	12,113
Revolving Loan Commitments | Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.)
Unfunded commitments
Total Unfunded Commitments		447
Revolving Loan Commitments | Branford Filtration, LLC (d/b/a Clean Solutions Group)
Unfunded commitments
Total Unfunded Commitments	387	387
Revolving Loan Commitments | Bridgepoint Healthcare, LLC
Unfunded commitments
Total Unfunded Commitments	1,350	1,588
Revolving Loan Commitments | BUSA Acquisition Co. (d/b/a BankCard USA Merchant Services Inc.)
Unfunded commitments
Total Unfunded Commitments	184
Revolving Loan Commitments | Claridge Products and Equipment, LLC
Unfunded commitments
Total Unfunded Commitments	70	351
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 | Gulf Winds International Acquisition, LLC (d/b/a Gulf Winds International, Inc.)
Unfunded commitments
Total Unfunded Commitments	485	647
Revolving Loan Commitments | HC Salon Holdings, Inc. (d/b/a Hair Cuttery)
Unfunded commitments
Total Unfunded Commitments	700	700
Revolving Loan Commitments | Leviathan Intermediate Holdco, LLC (d/b/a Unleashed Brands Group)
Unfunded commitments
Total Unfunded Commitments	570	570
Revolving Loan Commitments | Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC)
Unfunded commitments
Total Unfunded Commitments	305	572
Revolving Loan Commitments | Motivational Marketing, LLC (d/b/a Motivational Fulfillment)
Unfunded commitments
Total Unfunded Commitments		709
Revolving Loan Commitments | MSI Information Services, Inc.
Unfunded commitments
Total Unfunded Commitments	225	225
Revolving Loan Commitments | M&M OpCo. LLC (d/b/a Escalent, Inc.)
Unfunded commitments
Total Unfunded Commitments	238	238
Revolving Loan Commitments | Naviga Inc. (f/k/a Newscycle Solutions, Inc.)
Unfunded commitments
Total Unfunded Commitments		30
Revolving Loan Commitments | PANOS Brands, LLC
Unfunded commitments
Total Unfunded Commitments	412
Revolving Loan Commitments | Ribbon Communications Operating Company, Inc. (d/b/a Ribbon Communications Inc.)
Unfunded commitments
Total Unfunded Commitments	880
Revolving Loan Commitments | PLTFRM Companies, LLC
Unfunded commitments
Total Unfunded Commitments	176
Revolving Loan Commitments | Salon Republic Holdings, LLC (d/b/a Salon Republic, LLC)
Unfunded commitments
Total Unfunded Commitments	861	610
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	222	87
Revolving Loan Commitments | The Kyjen Company, LLC (d/b/a Outward Hound)
Unfunded commitments
Total Unfunded Commitments	798	798
Revolving Loan Commitments | TOT Group, Inc. (d/b/a Net Element Inc.)
Unfunded commitments
Total Unfunded Commitments	553
Revolving Loan Commitments | Zephyr Buyer, L.P. (d/b/a The Weather Company, LLC)
Unfunded commitments
Total Unfunded Commitments	1,806
Delayed Draw Loan Commitments
Unfunded commitments
Total Unfunded Commitments	10,313	9,327
Delayed Draw Loan Commitments | Barrett Purchaser LLC (d/b/a SIB Development and Consulting, Inc.)
Unfunded commitments
Total Unfunded Commitments		895
Delayed Draw Loan Commitments | Midwest Texas Tea CA, LLC (d/b/a US Petroleum Partners, LLC)
Unfunded commitments
Total Unfunded Commitments	245	648
Delayed Draw Loan Commitments | Salon Republic Holdings, LLC (d/b/a Salon Republic, LLC)
Unfunded commitments
Total Unfunded Commitments	2,104	1,407
Delayed Draw Loan Commitments | TOT Group, Inc. (d/b/a Net Element Inc.)
Unfunded commitments
Total Unfunded Commitments	1,107
Delayed Draw Loan Commitments | Arcserve Cayman Opco LP (d/b/a Arcserve (USA), LLC)
Unfunded commitments
Total Unfunded Commitments	1,422
Delayed Draw Loan Commitments | Avision Holdings, LLC (d/b/a Avision Sales Group)
Unfunded commitments
Total Unfunded Commitments	2,311
Delayed Draw Loan Commitments | Banner Acquisition Holdings, LLC (d/b/a Banner Industries, Inc.)
Unfunded commitments
Total Unfunded Commitments		140
Delayed Draw Loan Commitments | StoicLane MidCo, LLC (d/b/a StoicLane Inc.)
Unfunded commitments
Total Unfunded Commitments		$ 6,237
Delayed Draw Loan Commitments | Monarch Collective Holdings, LLC
Unfunded commitments
Total Unfunded Commitments	$ 3,124

COMMITMENTS AND CONTINGENCIES_2

COMMITMENTS AND CONTINGENCIES - Additional information (Details) - STRS JV - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Unfunded commitments
Commitments to fund equity interests	$ 23,000
Commitments to fund subordinated notes		$ 92,000
Unfunded equity interests	1,896
Unfunded subordinated notes	$ 7,584

STOCKHOLDERS' EQUITY - Addition

STOCKHOLDERS' EQUITY - Additional Information (Details) - ATM Program - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended			6 Months Ended
	Mar. 15, 2021	Jun. 30, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Subsidiary, Sale of Stock
Stock issued in connection with offering (in shares)		0	0		0	0
B. Riley Securities, Inc. | Maximum
Subsidiary, Sale of Stock
Aggregate offering amount				$ 35,000
Raymond James & Associates, Inc.
Subsidiary, Sale of Stock
Shares sold in the program	276,300
Weighted-average price	$ 15.77
Proceeds, before offering expenses	$ 4,359
Net proceeds of commissions to sales agent	4,272
Raymond James & Associates, Inc. | Maximum
Subsidiary, Sale of Stock
Aggregate offering amount	$ 35,000

FINANCIAL HIGHLIGHTS (Details)

FINANCIAL HIGHLIGHTS (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Per share data:
Net asset value, beginning of period	$ 13.63	$ 14.30
Investment operations:
Net investment income	0.86	0.92
Net realized and unrealized gains (losses) on investments and foreign currency transactions	(0.27)	(0.43)
Net increase in net assets resulting from operations	0.59	0.49
Distributions declared from net investment income	(0.77)	(0.79)
Net asset value, end of period	$ 13.45	$ 14
Total annualized return based on market value	(0.49%)	(3.40%)
Total annualized return based on net asset value	8.72%	6.89%
Net assets, end of period	$ 312,682	$ 325,296
Per share market value at end of period	$ 12.27	$ 12.83
Shares outstanding end of period	23,243,088	23,243,088
Ratios/Supplemental Data:
Ratio of expenses before incentive fees to average net assets	15.04%	15.22%
Ratio of incentive fees to average net assets	3.17%	3.22%
Ratio of total expenses to average net assets	18.21%	18.44%
Ratio of net investment income to average net assets	12.69%	12.89%
Portfolio turnover ratio	17.01%	8.75%

CHANGE IN NET ASSETS RESULTIN_3

CHANGE IN NET ASSETS RESULTING FROM OPERATIONS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
CHANGE IN NET ASSETS RESULTING FROM OPERATIONS PER COMMON SHARE
Net increase in net assets resulting from operations	$ 7,839	$ 3,881	$ 13,808	$ 11,387
Weighted average shares outstanding, basic	23,243,088	23,243,088	23,243,088	23,243,088
Weighted average shares outstanding, diluted	23,243,088	23,243,088	23,243,088	23,243,088
Basic per share net increase in net assets resulting from operations	$ 0.34	$ 0.17	$ 0.59	$ 0.49
Diluted per share net increase in net assets resulting from operations	$ 0.34	$ 0.17	$ 0.59	$ 0.49