Main Street Capital (MAIN) 10-Q 5 May 23 2023 Q1 Quarterly report Financial data

Cover

Cover - shares	3 Months Ended
	Mar. 31, 2023	May 04, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2023
Document Transition Report	false
Securities Act File Number	001-33723
Entity Registrant Name	Main Street Capital Corporation
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	41-2230745
Entity Address, Address Line One	1300 Post Oak Boulevard
Entity Address, Address Line Two	8th Floor
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77056
City Area Code	713
Local Phone Number	350-6000
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	MAIN
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		80,466,696
Entity Central Index Key	0001396440
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023		Dec. 31, 2022
ASSETS
Investments at fair value:	$ 4,160,917		$ 4,102,177	[1]
Cash and cash equivalents	39,752		49,121
Interest and dividend receivable and other assets	84,597		82,731
Receivable for securities sold	505		381
Deferred financing costs (net of accumulated amortization of $11,003 and $10,603 as of March 31, 2023 and December 31, 2022, respectively)	7,484		7,475
Total assets	4,293,255		4,241,885
LIABILITIES
Debt	1,989,641		1,999,102
Accounts payable and other liabilities	39,759		52,092
Interest payable	18,671		16,580
Dividend payable	18,036		17,676
Deferred tax liability, net	54,226		47,849
Total liabilities	2,120,333		2,133,299
Commitments and contingencies (Note K)
NET ASSETS
Common stock, $0.01 par value per share (150,000,000 shares authorized; 79,766,002 and 78,463,599 shares issued and outstanding as of March 31, 2023 and December 31, 2022, respectively)	797		784
Additional paid‑in capital	2,083,175		2,030,531
Total undistributed earnings	88,950		77,271
Total net assets	2,172,922		2,108,586
Total liabilities and net assets	$ 4,293,255		$ 4,241,885
NET ASSET VALUE PER SHARE (in dollars per share)	$ 27.23		$ 26.86
Line of Credit | Revolving Credit Facility
LIABILITIES
Debt	$ 564,000		$ 607,000
Unsecured Notes | July 2026 Notes
LIABILITIES
Debt	498,267		498,136
Unsecured Notes | May 2024 Notes
LIABILITIES
Debt	450,590		450,727
Unsecured Notes | SBIC Debentures
LIABILITIES
Debt	328,206		343,914
Unsecured Notes | December 2025 Notes
LIABILITIES
Debt	148,578		99,325
Control investments
ASSETS
Investments at fair value:	1,746,003	[2],[3]	1,703,172	[1],[4]
Affiliate investments
ASSETS
Investments at fair value:	626,227	[2],[5]	618,359	[1],[6]
Non‑Control/Non‑Affiliate investments
ASSETS
Investments at fair value:	$ 1,788,687		$ 1,780,646	[1],[7]
[1] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	Mar. 31, 2023		Dec. 31, 2022
Investment, cost	$ 3,797,714,000		$ 3,773,752,000	[1]
Deferred financing costs, accumulated amortization	$ 11,003,000		$ 10,603,000
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01
Common stock, shares authorized (in shares)	150,000,000		150,000,000
Common stock, shares outstanding (in shares)	79,766,002		78,463,599
Common stock, shares issued (in shares)	79,766,002		78,463,599
July 2026 Notes | Unsecured Notes
Debt instrument, par value	$ 500,000,000		$ 500,000,000
May 2024 Notes | Unsecured Notes
Debt instrument, par value	450,000,000		450,000,000
SBIC Debentures | Unsecured Notes
Debt instrument, par value	334,000,000		350,000,000
Debt, due within one year	63,800,000
December 2025 Notes | Unsecured Notes
Debt instrument, par value	150,000,000		150,000,000
Debt, due within one year	100,000,000		100,000,000
Control investments
Investment, cost	1,315,277,000	[2],[3]	1,270,802,000	[1],[4]
Affiliate investments
Investment, cost	591,458,000	[3],[5]	635,536,000	[1],[6]
Non‑Control/Non‑Affiliate investments
Investment, cost	$ 1,890,979,000		$ 1,867,414,000	[1],[7]
[1]Principal is net of repayments. Cost is net of repayments and accumulated unearned income. Negative cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan.[2]Control investments are defined by the 1940 Act as investments in which more than 25% of the voting securities are owned or where the ability to nominate greater than 50% of the board representation is maintained[3]Principal is net of repayments. Cost is net of repayments and accumulated unearned income. Negative cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan.[4]Control investments are defined by the 1940 Act as investments in which more than 25% of the voting securities are owned or where the ability to nominate greater than 50% of the board representation is maintained.[5]Affiliate investments are defined by the 1940 Act as investments in which between 5% and 25% (inclusive) of the voting securities are owned and the investments are not classified as Control investments.[6]Affiliate investments are defined by the 1940 Act as investments in which between 5% and 25% (inclusive) of the voting securities are owned and the investments are not classified as Control investments.[7]Non-Control/Non-Affiliate investments are defined by the 1940 Act as investments that are neither Control investments nor Affiliate investments.

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
INVESTMENT INCOME:
Non‑Control/Non‑Affiliate investments	$ 120,254	$ 79,395
EXPENSES:
Interest	(24,997)	(16,687)
Compensation	(11,111)	(7,269)
General and administrative	(4,077)	(3,226)
Share‑based compensation	(4,100)	(2,818)
Expenses allocated to the External Investment Manager	4,998	2,817
Total allocated expenses	(39,287)	(27,183)
NET INVESTMENT INCOME	80,967	52,212
NET REALIZED GAIN (LOSS):
Net realized (gain) loss	(28,379)	3,336
NET UNREALIZED APPRECIATION (DEPRECIATION):
Total net unrealized appreciation (depreciation)	35,118	14,752
INCOME TAXES:
Federal and state income, excise and other taxes	(1,737)	(1,309)
Deferred taxes	(6,377)	(3,788)
Total income tax provision	(8,114)	(5,097)
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS	$ 79,592	$ 65,203
NET INVESTMENT INCOME PER SHARE— BASIC (in dollars per share)	$ 1.02	$ 0.73
NET INVESTMENT INCOME PER SHARE— DILUTED (in dollars per share)	1.02	0.73
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS PER SHARE—BASIC (in dollars per share)	1	0.91
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS PER SHARE—DILUTED (in dollars per share)	$ 1	$ 0.91
WEIGHTED AVERAGE SHARES OUTSTANDING—BASIC (in shares)	79,552,200	71,708,326
WEIGHTED AVERAGE SHARES OUTSTANDING—DIILUTED (in shares)	79,552,200	71,708,326
Control investments
INVESTMENT INCOME:
Non‑Control/Non‑Affiliate investments	$ 48,862	$ 32,577
NET REALIZED GAIN (LOSS):
Net realized (gain) loss	(2,966)	0
NET UNREALIZED APPRECIATION (DEPRECIATION):
Total net unrealized appreciation (depreciation)	17,161	8,279
Affiliate investments
INVESTMENT INCOME:
Non‑Control/Non‑Affiliate investments	17,456	13,917
NET REALIZED GAIN (LOSS):
Net realized (gain) loss	(26,264)	692
NET UNREALIZED APPRECIATION (DEPRECIATION):
Total net unrealized appreciation (depreciation)	33,141	3,041
Non‑Control/Non‑Affiliate investments
INVESTMENT INCOME:
Non‑Control/Non‑Affiliate investments	53,936	32,901
NET REALIZED GAIN (LOSS):
Net realized (gain) loss	851	2,644
NET UNREALIZED APPRECIATION (DEPRECIATION):
Total net unrealized appreciation (depreciation)	$ (15,184)	$ 3,432

Consolidated Statements of Chan

Consolidated Statements of Changes in Net Assets - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period (in shares)	78,463,599
Balance at beginning of period	$ 2,108,586	$ 1,788,846
Public offering of common stock, net of offering costs	40,896	63,522
Share‑based compensation	$ 4,100	$ 2,818
Purchase of vested stock for employee payroll tax withholding (in shares)	(10,489)
Purchase of vested stock for employee payroll tax withholding	$ (404)
Dividend reinvestment (in shares)	199,282	114,043
Dividend reinvestment	$ 7,808	$ 4,813
Amortization of directors’ deferred compensation	121	147
Dividends to stockholders	(67,777)	(51,695)
Net increase resulting from operations	$ 79,592	65,203
Balance at ending of period (in shares)	79,766,002
Balance at ending of period	$ 2,172,922	$ 1,873,654
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period (in shares)	78,506,816	70,737,021
Balance at beginning of period	$ 784	$ 707
Public offering of common stock, net of offering costs (in shares)	1,058,914	1,502,430
Public offering of common stock, net of offering costs	$ 11	$ 15
Dividend reinvestment (in shares)	199,282	114,043
Dividend reinvestment	$ 2	$ 1
Issuance of restricted stock, net of forfeited shares (in shares)	39,566	16,913
Balance at ending of period (in shares)	79,794,089	72,370,407
Balance at ending of period	$ 797	$ 723
Additional Paid-In Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	2,030,531	1,736,346
Public offering of common stock, net of offering costs	40,885	63,507
Share‑based compensation	4,100	2,818
Dividend reinvestment	7,806	4,812
Amortization of directors’ deferred compensation	121	147
Dividends to stockholders	136	109
Balance at ending of period	2,083,175	1,807,739
Total Undistributed (Overdistributed) Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	77,271	51,793
Dividends to stockholders	(67,913)	(51,804)
Net increase resulting from operations	79,592	65,203
Balance at ending of period	$ 88,950	$ 65,192

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net increase in net assets resulting from operations	$ 79,592	$ 65,203
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Investments in portfolio companies	(109,036)	(315,369)
Proceeds from sales and repayments of debt investments in portfolio companies	56,644	218,781
Proceeds from sales and return of capital of equity investments in portfolio companies	6,817	19,963
Net unrealized appreciation	(35,118)	(14,752)
Net realized (gain) loss	28,379	(3,336)
Accretion of unearned income	(4,673)	(2,834)
Payment-in-kind interest	(2,895)	(937)
Cumulative dividends	(417)	(887)
Share-based compensation expense	4,100	2,818
Amortization of deferred financing costs	753	686
Deferred tax provision	6,377	3,788
Changes in other assets and liabilities:
Interest and dividend receivable and other assets	(1,357)	(11,731)
Interest payable	2,091	2,219
Accounts payable and other liabilities	(12,212)	(13,667)
Deferred fees and other	925	378
Net cash provided by (used in) operating activities	19,970	(49,677)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from public offering of common stock, net of offering costs	40,896	63,522
Proceeds from public offering of December 2025 Notes	50,000	0
Dividends paid	(59,609)	(46,522)
Repayments of SBIC debentures	(16,000)	0
Proceeds from credit facilities	97,000	185,000
Repayments on credit facilities	(140,000)	(167,000)
Debt issuance costs, net	(1,222)	0
Purchases of vested stock for employee payroll tax withholding	(404)	0
Net cash provided by (used in) financing activities	(29,339)	35,000
Net decrease in cash and cash equivalents	(9,369)	(14,677)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	49,121	32,629	$ 32,629
CASH AND CASH EQUIVALENTS AT END OF PERIOD	39,752	17,952	$ 49,121
Supplemental cash flow disclosures:
Interest paid	22,122	13,751
Taxes paid	2,726	2,874
Non-cash financing activities:
Value of shares issued pursuant to the DRIP	$ 7,808	$ 4,813

Consolidated Schedule of Invest

Consolidated Schedule of Investments - USD ($) $ in Thousands		Mar. 31, 2023		Dec. 31, 2022
Schedule of Investments [Line Items]
Cost		$ 3,797,714		$ 3,773,752	[1]
Fair value		$ 4,160,917		$ 4,102,177	[2]
Investment owned, percent of net assets		191.50%		194.50%
Analytical Systems Keco Holdings, LLC
Schedule of Investments [Line Items]
Cost		$ 10,436		$ 10,485
Fair value		8,081		8,046
ASC Interests, LLC
Schedule of Investments [Line Items]
Cost		3,549		3,549
Fair value		2,749		2,849
ATS Workholding, LLC
Schedule of Investments [Line Items]
Cost		8,503	[3]	8,484	[4]
Fair value		1,343	[3]	1,639	[4]
Barfly Ventures, LLC
Schedule of Investments [Line Items]
Cost		2,295	[3]	2,295	[4]
Fair value		3,748	[3]	4,031	[4]
Batjer TopCo, LLC
Schedule of Investments [Line Items]
Cost		14,580		15,020
Fair value		16,635		15,020
Bolder Panther Group, LLC
Schedule of Investments [Line Items]
Cost		111,952		112,576
Fair value		129,955		130,614
Brewer Crane Holdings, LLC
Schedule of Investments [Line Items]
Cost		10,120		10,244
Fair value		12,400		13,044
Bridge Capital Solutions Corporation
Schedule of Investments [Line Items]
Cost		12,945		12,945
Fair value		15,153		15,153
California Splendor Holdings LLC
Schedule of Investments [Line Items]
Cost		42,873		42,720
Fair value		57,639		57,489
Centre Technologies Holdings, LLC
Schedule of Investments [Line Items]
Cost		21,082		21,076
Fair value		24,220		23,654
Chamberlin Holding LLC
Schedule of Investments [Line Items]
Cost		30,153		30,148
Fair value		42,575		42,575
Charps, LLC
Schedule of Investments [Line Items]
Cost		6,615		6,606
Fair value		19,244		19,034
Clad-Rex Steel, LLC
Schedule of Investments [Line Items]
Cost		18,492		18,969
Fair value		19,002		20,309
Cody Pools, Inc.
Schedule of Investments [Line Items]
Cost		49,458		50,281
Fair value		100,581		100,443
Colonial Electric Company LLC
Schedule of Investments [Line Items]
Cost		30,530		30,831
Fair value		31,050		32,311
CompareNetworks Topco, LLC
Schedule of Investments [Line Items]
Cost		6,837		7,207
Fair value		23,309		25,071
Datacom, LLC
Schedule of Investments [Line Items]
Cost		11,221		11,023
Fair value		10,881		10,682
Digital Products Holdings LLC
Schedule of Investments [Line Items]
Cost		24,704		25,024
Fair value		25,038		25,358
Direct Marketing Solutions, Inc.
Schedule of Investments [Line Items]
Cost		35,063		35,434
Fair value		48,576		49,487
Elgin AcquireCo, LLC
Schedule of Investments [Line Items]
Cost		34,041		34,040
Fair value		34,041		34,040
Gamber-Johnson Holdings, LLC
Schedule of Investments [Line Items]
Cost		80,601		81,377
Fair value		122,648		114,968
Garreco, LLC
Schedule of Investments [Line Items]
Cost		4,749		5,026
Fair value		5,129		5,626
GRT Rubber Technologies LLC
Schedule of Investments [Line Items]
Cost		54,354		54,048
Fair value		85,898		85,603
Gulf Publishing Holdings, LLC
Schedule of Investments [Line Items]
Cost		11,681		11,681
Fair value		6,064		6,064
Harris Preston Fund Investments
Schedule of Investments [Line Items]
Cost		4,275	[5],[6]	4,143	[7],[8]
Fair value		7,257	[5],[6]	7,800	[7],[8]
Jensen Jewelers of Idaho, LLC
Schedule of Investments [Line Items]
Cost		3,257		17,420
Fair value		17,300		3,255
Johnson Downie Opco, LLC
Schedule of Investments [Line Items]
Cost		13,062		13,056
Fair value		16,549		15,539
JorVet Holdings, LLC
Schedule of Investments [Line Items]
Cost		36,186		36,173
Fair value		36,186		36,173
KBK Industries, LLC
Schedule of Investments [Line Items]
Cost		6,477
Fair value		17,730
Kickhaefer Manufacturing Company, LLC
Schedule of Investments [Line Items]
Cost		37,631		37,448
Fair value		34,399		34,286
Market Force Information, LLC
Schedule of Investments [Line Items]
Cost		49,482		48,847
Fair value		0		7,700
MetalForming AcquireCo, LLC
Schedule of Investments [Line Items]
Cost		31,252		31,123
Fair value		31,252		31,123
MH Corbin Holding LLC
Schedule of Investments [Line Items]
Cost		16,440		16,556
Fair value		5,384		4,548
MS Private Loan Fund I, LP
Schedule of Investments [Line Items]
Cost		14,250	[5],[6]	14,250	[7],[8]
Fair value		14,775	[5],[6]	14,833	[7],[8]
Mystic Logistics Holdings, LLC
Schedule of Investments [Line Items]
Cost		8,466		8,466
Fair value		30,756		28,576
Nebraska Vet AcquireCo, LLC
Schedule of Investments [Line Items]
Cost		37,409		37,393
Fair value		41,814		38,294
NexRev LLC
Schedule of Investments [Line Items]
Cost		18,940		19,548
Fair value		11,860		9,587
NRP Jones, LLC
Schedule of Investments [Line Items]
Cost		5,797		5,797
Fair value		7,160		6,870
NuStep, LLC
Schedule of Investments [Line Items]
Cost		35,078		35,075
Fair value		35,596		36,003
OMi Topco, LLC
Schedule of Investments [Line Items]
Cost		15,977		16,714
Fair value		40,100		38,560
Orttech Holdings, LLC
Schedule of Investments [Line Items]
Cost		32,646		33,429
Fair value		36,146		35,179
Pearl Meyer Topco LLC
Schedule of Investments [Line Items]
Cost		55,514		41,537
Fair value		86,221		71,941
PPL RVs, Inc.
Schedule of Investments [Line Items]
Cost		23,800		23,787
Fair value		40,775		40,843
Principle Environmental, LLC
Schedule of Investments [Line Items]
Cost		12,721		12,715
Fair value		16,792		18,816
Robbins Bros. Jewelry, Inc.
Schedule of Investments [Line Items]
Cost		46,235		46,439
Fair value		45,095		50,249
Tedder Industries, LLC
Schedule of Investments [Line Items]
Cost		26,502		26,277
Fair value		24,167		24,641
Televerde, LLC
Schedule of Investments [Line Items]
Cost		2,008		2,008
Fair value		8,393		7,202
Trantech Radiator Topco, LLC
Schedule of Investments [Line Items]
Cost		12,546		12,544
Fair value		17,226		15,720
Volusion, LLC
Schedule of Investments [Line Items]
Cost		30,122		33,719
Fair value		13,546		14,914
VVS Holdco LLC
Schedule of Investments [Line Items]
Cost		42,001		41,977
Fair value		42,201		42,080
Ziegler’s NYPD, LLC
Schedule of Investments [Line Items]
Cost		7,634		7,634
Fair value		3,926		4,311
AAC Holdings, Inc.
Schedule of Investments [Line Items]
Cost		15,625	[9]	14,738	[10]
Fair value		12,164	[9]	11,550	[10]
ATX Networks Corp.
Schedule of Investments [Line Items]
Cost	[10]			8,499
Fair value	[10]			12,211
BBB Tank Services, LLC
Schedule of Investments [Line Items]
Cost		5,762		5,762
Fair value		2,886		2,886
Boccella Precast Products LLC
Schedule of Investments [Line Items]
Cost		2,576		2,576
Fair value		3,090		3,290
Buca C, LLC
Schedule of Investments [Line Items]
Cost		21,750		22,125
Fair value		11,962		12,337
Career Team Holdings, LLC
Schedule of Investments [Line Items]
Cost		24,591		24,581
Fair value		24,591		24,581
Classic H&G Holdings, LLC
Schedule of Investments [Line Items]
Cost		29,512		29,502
Fair value		49,534		48,471
DMA Industries, LLC
Schedule of Investments [Line Items]
Cost		26,990		26,979
Fair value		28,460		28,460
Dos Rios Partners
Schedule of Investments [Line Items]
Cost		8,510	[5],[6]	8,510	[7],[8]
Fair value		12,181	[5],[6]	12,025	[7],[8]
Flame King Holdings, LLC
Schedule of Investments [Line Items]
Cost		38,992		38,975
Fair value		49,990		46,380
Freeport Financial Funds
Schedule of Investments [Line Items]
Cost		9,274	[5],[6]	9,810	[7],[8]
Fair value		8,795	[5],[6]	9,331	[7],[8]
GFG Group, LLC.
Schedule of Investments [Line Items]
Cost		16,175		16,169
Fair value		18,935		18,485
Harris Preston Fund Investments
Schedule of Investments [Line Items]
Cost		5,782	[5],[6]	6,290	[7],[8]
Fair value		7,668	[5],[6]	8,063	[7],[8]
Hawk Ridge Systems, LLC
Schedule of Investments [Line Items]
Cost		44,692		43,868
Fair value		60,180		59,365
Houston Plating and Coatings, LLC
Schedule of Investments [Line Items]
Cost		5,352		5,352
Fair value		5,830		5,400
Infinity X1 Holdings, LLC
Schedule of Investments [Line Items]
Cost		21,823
Fair value		21,823
Iron-Main Investments, LLC
Schedule of Investments [Line Items]
Cost		49,738		37,931
Fair value		49,738		37,931
OnAsset Intelligence, Inc.
Schedule of Investments [Line Items]
Cost		12,683		12,683
Fair value		5,255		5,309
Oneliance, LLC
Schedule of Investments [Line Items]
Cost		6,538		6,615
Fair value		6,538		6,615
Rocaceia, LLC (Quality Lease and Rental Holdings, LLC)
Schedule of Investments [Line Items]
Cost				32,365
Fair value				0
SI East, LLC
Schedule of Investments [Line Items]
Cost		85,708		90,926
Fair value		98,186		103,436
Slick Innovations, LLC
Schedule of Investments [Line Items]
Cost		13,924		14,154
Fair value		15,390		15,370
Sonic Systems International, LLC
Schedule of Investments [Line Items]
Cost		16,898	[3]	16,883	[4]
Fair value		16,999	[3]	17,049	[4]
Student Resource Center, LLC
Schedule of Investments [Line Items]
Cost		4,556	[3]	4,556	[4]
Fair value		4,556	[3]	4,556	[4]
Superior Rigging & Erecting Co.
Schedule of Investments [Line Items]
Cost		24,895		25,878
Fair value		25,365		25,878
The Affiliati Network, LLC
Schedule of Investments [Line Items]
Cost		15,636		15,948
Fair value		15,636		15,948
UniTek Global Services, Inc.
Schedule of Investments [Line Items]
Cost		20,742	[9]	20,535	[10]
Fair value		12,382	[9]	11,510	[10]
Universal Wellhead Services Holdings, LLC
Schedule of Investments [Line Items]
Cost		5,032	[3]	5,032	[4]
Fair value		218	[3]	220	[4]
World Micro Holdings, LLC
Schedule of Investments [Line Items]
Cost		17,992		17,985
Fair value		17,992		17,985
AB Centers Acquisition Corporation
Schedule of Investments [Line Items]
Cost		19,796	[3]	17,216	[4]
Fair value		20,371	[3]	17,754	[4]
Acousti Engineering Company of Florida
Schedule of Investments [Line Items]
Cost		12,156	[3]	12,294	[4]
Fair value		12,230	[3]	12,376	[4]
Acumera, Inc.
Schedule of Investments [Line Items]
Cost		19,293	[3]	18,561	[4]
Fair value		19,714	[3]	18,986	[4]
Adams Publishing Group, LLC
Schedule of Investments [Line Items]
Cost		30,462	[3]	28,762	[4]
Fair value		30,200	[3]	28,815	[4]
AMEREQUIP LLC.
Schedule of Investments [Line Items]
Cost		38,436	[3]	38,461	[4]
Fair value		39,158	[3]	39,105	[4]
American Health Staffing Group, Inc.
Schedule of Investments [Line Items]
Cost		6,542	[3]	6,555	[4]
Fair value		6,590	[3]	6,607	[4]
American Nuts, LLC
Schedule of Investments [Line Items]
Cost		29,296	[3]	30,816	[4]
Fair value		25,405	[3]	29,260	[4]
American Teleconferencing Services, Ltd.
Schedule of Investments [Line Items]
Cost		16,686	[9]	16,686	[10]
Fair value		889	[9]	976	[10]
ArborWorks, LLC
Schedule of Investments [Line Items]
Cost		33,877	[3]	34,064	[4]
Fair value		27,523	[3]	29,010	[4]
Archer Systems, LLC
Schedule of Investments [Line Items]
Cost		65,246	[3]	67,583	[4]
Fair value		65,104	[3]	67,764	[4]
ATS Operating, LLC
Schedule of Investments [Line Items]
Cost		14,400	[3]	14,040	[4]
Fair value		14,195	[3]	13,835	[4]
AVEX Aviation Holdings, LLC
Schedule of Investments [Line Items]
Cost		30,946	[3]	28,230	[4]
Fair value		30,939	[3]	28,276	[4]
Berry Aviation, Inc.
Schedule of Investments [Line Items]
Cost		1,381	[3]	1,356	[4]
Fair value		6,081	[3]	5,026	[4]
Bettercloud, Inc.
Schedule of Investments [Line Items]
Cost		27,384	[3]	26,944	[4]
Fair value		27,847	[3]	27,429	[4]
Bluestem Brands, Inc.
Schedule of Investments [Line Items]
Cost		4,688	[9]	3,317	[10]
Fair value		8,010	[9]	9,094	[10]
Brainworks Software, LLC
Schedule of Investments [Line Items]
Cost		7,817	[11],[12],[13]	7,817	[4]
Fair value		2,895	[11],[12],[13]	3,677	[4]
Brightwood Capital Fund Investments
Schedule of Investments [Line Items]
Cost		13,412	[5],[6]	13,412	[7],[8]
Fair value		11,530	[5],[6]	11,497	[7],[8]
Burning Glass Intermediate Holding Company, Inc.
Schedule of Investments [Line Items]
Cost		20,317	[3]	19,628	[4]
Fair value		20,606	[3]	19,933	[4]
Cadence Aerospace LLC
Schedule of Investments [Line Items]
Cost	[3]	28,846
Fair value	[3]	28,891
CAI Software LLC
Schedule of Investments [Line Items]
Cost		1,789		1,789
Fair value		1,789		1,789
Camin Cargo Control, Inc.
Schedule of Investments [Line Items]
Cost	[9]	15,079
Fair value	[9]	14,646
CaseWorthy, Inc.
Schedule of Investments [Line Items]
Cost		14,238	[3]	14,228	[4]
Fair value		14,288	[3]	14,282	[4]
Channel Partners Intermediateco, LLC
Schedule of Investments [Line Items]
Cost		44,884	[3]	40,163	[4]
Fair value		44,768	[3]	40,325	[4]
Computer Data Source, LLC
Schedule of Investments [Line Items]
Cost		23,267	[3]	23,243	[4]
Fair value		21,507	[3]	21,799	[4]
Dalton US Inc.
Schedule of Investments [Line Items]
Cost		17,202	[3]	15,123	[4]
Fair value		17,204	[3]	15,390	[4]
DTE Enterprises, LLC
Schedule of Investments [Line Items]
Cost		7,598	[3]	8,001	[4]
Fair value		7,204	[3]	7,474	[4]
Dynamic Communities, LLC
Schedule of Investments [Line Items]
Cost		3,487	[3]	3,487	[4]
Fair value		3,487	[3]	3,487	[4]
Eastern Wholesale Fence LLC
Schedule of Investments [Line Items]
Cost		31,410	[3]	31,406	[4]
Fair value		30,778	[3]	31,159	[4]
EnCap Energy Fund Investments
Schedule of Investments [Line Items]
Cost		28,498	[5],[6]	28,866	[7],[8]
Fair value		22,301	[5],[6]	21,905	[7],[8]
Cody Pools, Inc.
Schedule of Investments [Line Items]
Cost		16,920	[3]	16,132	[4]
Fair value		17,114	[3]	16,469	[4]
Event Holdco, LLC
Schedule of Investments [Line Items]
Cost		47,642	[3],[14]	47,618	[4]
Fair value		45,549	[3],[14]	45,590	[4]
Flip Electronics LLC
Schedule of Investments [Line Items]
Cost		11,854	[3]	11,588	[4]
Fair value		12,077	[3]	11,831	[4]
Fuse, LLC
Schedule of Investments [Line Items]
Cost		2,066	[9]	2,066	[10]
Fair value		1,512	[9]	1,512	[10]
GS HVAM Intermediate, LLC
Schedule of Investments [Line Items]
Cost		11,802	[3]	12,864	[4]
Fair value		11,815	[3]	12,876	[4]
GULF PACIFIC ACQUISITION, LLC
Schedule of Investments [Line Items]
Cost		4,197	[3]	3,809	[4]
Fair value		4,281	[3]	3,898	[4]
HDC/HW Intermediate Holdings
Schedule of Investments [Line Items]
Cost		3,715	[3]	3,581	[4]
Fair value		3,632	[3]	3,497	[4]
HEADLANDS OP-CO LLC
Schedule of Investments [Line Items]
Cost		16,340	[3]	16,359	[4]
Fair value		16,630	[3]	16,667	[4]
IG Parent Corporation
Schedule of Investments [Line Items]
Cost		14,263	[9],[11],[14]	14,974	[10]
Fair value		14,320	[9],[11],[14]	15,197	[10]
Independent Pet Partners Intermediate Holdings, LLC
Schedule of Investments [Line Items]
Cost		34,533	[3]	30,253	[4]
Fair value		18,004	[3]	15,429	[4]
Industrial Services Acquisition, LLC
Schedule of Investments [Line Items]
Cost		21,026	[3]	20,507	[4]
Fair value		21,036	[3]	20,540	[4]
Infolinks Media Buyco, LLC
Schedule of Investments [Line Items]
Cost		8,452	[3]	8,442	[4]
Fair value		8,576	[3]	8,574	[4]
Interface Security Systems, L.L.C
Schedule of Investments [Line Items]
Cost		9,072	[3]	8,919	[4]
Fair value		2,863	[3]	2,764	[4]
Invincible Boat Company, LLC.
Schedule of Investments [Line Items]
Cost		17,516	[3]	17,402	[4]
Fair value		17,615	[3]	17,511	[4]
Jackmont Hospitality, Inc.
Schedule of Investments [Line Items]
Cost		2,610	[3]	2,685	[4]
Fair value		3,014	[3]	3,202	[4]
Joerns Healthcare, LLC
Schedule of Investments [Line Items]
Cost		10,857	[9]	10,723	[10]
Fair value		2,711	[9]	2,801	[10]
JTI Electrical & Mechanical, LLC
Schedule of Investments [Line Items]
Cost		37,717	[3]	37,907	[4]
Fair value		39,425	[3]	39,652	[4]
KMS, LLC
Schedule of Investments [Line Items]
Cost		8,390	[3]	8,410	[4]
Fair value		7,999	[3]	8,017	[4]
LL Management, Inc.
Schedule of Investments [Line Items]
Cost		27,974	[3]	27,980	[4]
Fair value		27,739	[3]	27,926	[4]
Mako Steel, LP
Schedule of Investments [Line Items]
Cost		16,849	[3]	18,185	[4]
Fair value		16,910	[3]	18,307	[4]
MB2 Dental Solutions, LLC
Schedule of Investments [Line Items]
Cost		16,954	[9]	16,051	[10]
Fair value		17,115	[9]	16,214	[10]
Microbe Formulas, LLC
Schedule of Investments [Line Items]
Cost		25,234	[3]	25,556	[4]
Fair value		24,796	[3]	25,118	[4]
MonitorUS Holding, LLC
Schedule of Investments [Line Items]
Cost		29,454	[3],[6],[15]	27,494	[4],[8],[16]
Fair value		30,688	[3],[6],[15]	28,577	[4],[8],[16]
NinjaTrader, LLC
Schedule of Investments [Line Items]
Cost		21,415	[3]	21,379
Fair value		21,633	[3]	21,628
NWN Corporation
Schedule of Investments [Line Items]
Cost		50,319	[3]	49,085	[4]
Fair value		48,371	[3]	47,530	[4]
Paragon Healthcare, Inc.
Schedule of Investments [Line Items]
Cost		22,460	[3]	20,898	[4]
Fair value		22,494	[3]	21,118	[4]
Project Eagle Holdings, LLC
Schedule of Investments [Line Items]
Cost		28,943	[3]	29,022	[4]
Fair value		28,981	[3]	29,401	[4]
PTL US Bidco, Inc
Schedule of Investments [Line Items]
Cost		28,886	[6]	27,575	[4],[8]
Fair value		28,736	[6]	27,737	[4],[8]
RA Outdoors LLC
Schedule of Investments [Line Items]
Cost		13,624	[3]	13,230
Fair value		12,398	[3]	12,083
RM Bidder, LLC
Schedule of Investments [Line Items]
Cost		471	[3]	471	[4]
Fair value		20	[3]	19	[4]
Roof Opco, LLC
Schedule of Investments [Line Items]
Cost		5,412	[3]	5,716	[4]
Fair value		5,428	[3]	5,817	[4]
RTIC Subsidiary Holdings, LLC
Schedule of Investments [Line Items]
Cost		17,304	[3]	17,849	[4]
Fair value		15,951	[3]	16,625	[4]
Rug Doctor, LLC.
Schedule of Investments [Line Items]
Cost		13,833	[3]	13,813	[4]
Fair value		12,850	[3]	12,515	[4]
SIB Holdings, LLC
Schedule of Investments [Line Items]
Cost		9,916	[3]	9,761	[4]
Fair value		9,014	[3]	9,123	[4]
South Coast Terminals Holdings, LLC
Schedule of Investments [Line Items]
Cost		41,338	[3]	41,396	[4]
Fair value		42,401	[3]	42,500	[4]
SPAU Holdings, LLC
Schedule of Investments [Line Items]
Cost		16,202	[3]	16,223	[4]
Fair value		16,473	[3]	16,510	[4]
Veregy Consolidated, Inc.
Schedule of Investments [Line Items]
Cost		16,778	[9]	16,751	[10]
Fair value		14,622	[9]	14,849	[10]
Wahoo Fitness Acquisition L.L.C.
Schedule of Investments [Line Items]
Cost	[9]	16,240
Fair value	[9]	8,172
Wall Street Prep, Inc.
Schedule of Investments [Line Items]
Cost		4,546	[3]	4,567	[4]
Fair value		4,539	[3]	4,560	[4]
Watterson Brands, LLC
Schedule of Investments [Line Items]
Cost		30,815	[3]	29,286	[4]
Fair value		31,106	[3]	29,708	[4]
West Star Aviation Acquisition, LLC
Schedule of Investments [Line Items]
Cost		12,113	[3]	12,129	[4]
Fair value		12,913	[3]	12,615	[4]
Winter Services LLC
Schedule of Investments [Line Items]
Cost		9,806	[3]	9,797	[4]
Fair value		9,983	[3]	9,975	[4]
Xenon Arc, Inc.
Schedule of Investments [Line Items]
Cost		62,415	[3]	61,337	[4]
Fair value		63,039	[3]	61,968	[4]
Zips Car Wash, LLC
Schedule of Investments [Line Items]
Cost		21,644	[3]	21,639	[4]
Fair value		21,840	[3]	21,891	[4]
Control investments
Schedule of Investments [Line Items]
Cost		1,315,277	[17],[18]	1,270,802	[1],[19]
Fair value		$ 1,746,003	[17],[20]	$ 1,703,172	[2],[19]
Investment owned, percent of net assets		80.40%		80.80%
Affiliate investments
Schedule of Investments [Line Items]
Cost		$ 591,458	[18],[21]	$ 635,536	[1],[22]
Fair value		$ 626,227	[20],[21]	$ 618,359	[2],[22]
Investment owned, percent of net assets		28.80%		29.30%
Non‑Control/Non‑Affiliate investments
Schedule of Investments [Line Items]
Cost		$ 1,890,979		$ 1,867,414	[1],[23]
Fair value		$ 1,788,687		$ 1,780,646	[2],[23]
Investment owned, percent of net assets		82.30%		84.40%
Investment, Identifier [Axis]: AAC Holdings, Inc., Common Stock
Schedule of Investments [Line Items]
Units (in shares)		593,928	[9]	593,928	[10]
Cost		$ 3,148	[9]	$ 3,148	[10]
Fair value		$ 0	[9]	$ 0	[10]
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[10]			18%
PIK Rate	[10]			18%
Principal	[10]			$ 11,726
Cost	[10]			11,590
Fair value	[10]			$ 11,550
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[9]	18%
Principal	[9]	$ 320
Cost	[9]	315
Fair value	[9]	$ 309
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[9]	18%
PIK Rate	[9]	18%
Principal	[9]	$ 12,285
Cost	[9]	12,162
Fair value	[9]	$ 11,855
Investment, Identifier [Axis]: AAC Holdings, Inc., Warrants
Schedule of Investments [Line Items]
Units (in shares)		554,353	[9],[24]	554,353	[10],[25]
Cost		$ 0	[9],[24]	$ 0	[10],[25]
Fair value		$ 0	[9],[24]	$ 0	[10],[25]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[3],[11]	13%
Reference Rate and Spread		5%	[3],[11]	6%	[4],[26],[27],[28]
Principal		$ 371	[3],[11]	$ 0	[4],[26],[27],[28]
Cost		333	[3],[11]	(39)	[4],[26],[27],[28]
Fair value		$ 370	[3],[11]	$ (39)	[4],[26],[27],[28]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.80%	[3],[11],[14],[29]	10.20%	[4],[26],[27]
Reference Rate and Spread		6%	[3],[11],[14],[29]	6%	[4],[26],[27]
Principal		$ 2,224	[3],[11],[14],[29]	$ 741	[4],[26],[27]
Cost		2,129	[3],[11],[14],[29]	653	[4],[26],[27]
Fair value		$ 2,217	[3],[11],[14],[29]	$ 741	[4],[26],[27]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.79%	[3],[11],[14]	10.58%	[4],[26],[27]
Reference Rate and Spread		6%	[3],[11],[14]	6%	[4],[26],[27]
Principal		$ 17,786	[3],[11],[14]	$ 17,052	[4],[26],[27]
Cost		17,334	[3],[11],[14]	16,602	[4],[26],[27]
Fair value		$ 17,784	[3],[11],[14]	$ 17,052	[4],[26],[27]
Investment, Identifier [Axis]: ADS Tactical, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.59%	[9],[11]	10.14%	[10],[27]
Reference Rate and Spread		5.75%	[9],[11]	5.75%	[10],[27]
Principal		$ 20,712	[9],[11]	$ 21,077	[10],[27]
Cost		20,443	[9],[11]	20,781	[10],[27]
Fair value		$ 19,262	[9],[11]	$ 18,969	[10],[27]
Investment, Identifier [Axis]: AFG Capital Group, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		186	[30]	186	[31]
Cost		$ 1,200	[30]	$ 1,200	[31]
Fair value		$ 9,400	[30]	$ 9,400	[31]
Investment, Identifier [Axis]: AMEREQUIP LLC., Common Stock
Schedule of Investments [Line Items]
Units (in shares)		235	[3],[30]	235	[4]
Cost		$ 1,844	[3],[30]	$ 1,779	[4]
Fair value		$ 1,930	[3],[30]	$ 1,779	[4]
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		7.40%	[3],[11],[14],[32]	7.40%	[4],[26],[27],[28]
Principal		$ 0	[3],[11],[14],[32]	$ 0	[4],[26],[27],[28]
Cost		(130)	[3],[11],[14],[32]	(137)	[4],[26],[27],[28]
Fair value		$ (130)	[3],[11],[14],[32]	$ (137)	[4],[26],[27],[28]
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.10%	[3],[11],[14]	11.72%	[4],[26],[27]
Reference Rate and Spread		7.40%	[3],[11],[14]	7.40%	[4],[26],[27]
Principal		$ 37,358	[3],[11],[14]	$ 37,491	[4],[26],[27]
Cost		36,722	[3],[11],[14]	36,819	[4],[26],[27]
Fair value		$ 37,358	[3],[11],[14]	$ 37,463	[4],[26],[27]
Investment, Identifier [Axis]: ASC Interests, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		1,500		1,500
Cost		$ 1,500		$ 1,500
Fair value		$ 700		$ 800
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13%		13%
Principal		$ 400		$ 400
Cost		400		400
Fair value		$ 400		$ 400
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%		13%
Principal		$ 1,650		$ 1,650
Cost		1,649		1,649
Fair value		$ 1,649		$ 1,649
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Preferred Member Units 1
Schedule of Investments [Line Items]
Total Rate		14.13%
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		10%
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.75%
Reference Rate and Spread		10%
Investment, Identifier [Axis]: ATS Operating, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		720,000	[3]	720,000	[4]
Cost		$ 720	[3]	$ 720	[4]
Fair value		$ 660	[3]	$ 660	[4]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[3],[11]	11.39%
Reference Rate and Spread		6.50%	[3],[11],[14]	5.50%	[4],[26],[27],[28]
Principal		$ 360	[3],[11],[14]	$ 0	[4],[26],[27],[28]
Cost		360	[3],[11],[14]	0	[4],[26],[27],[28]
Fair value		$ 360	[3],[11],[14]	$ 0	[4],[26],[27],[28]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.09%	[3],[11],[14]	9.32%	[4],[26],[27]
Reference Rate and Spread		5.50%	[3],[11],[14]	5.50%	[4],[26],[27]
Principal		$ 6,660	[3],[11],[14]	$ 6,660	[4],[26],[27]
Cost		6,660	[3],[11],[14]	6,660	[4],[26],[27]
Fair value		$ 6,582	[3],[11],[14]	$ 6,582	[4],[26],[27]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.09%	[3],[11],[14]	11.32%	[4],[26],[27]
Reference Rate and Spread		7.50%	[3],[11],[14]	7.50%	[4],[26],[27]
Principal		$ 6,660	[3],[11],[14]	$ 6,660	[4],[26],[27]
Cost		6,660	[3],[11],[14]	6,660	[4],[26],[27]
Fair value		$ 6,593	[3],[11],[14]	$ 6,593	[4],[26],[27]
Investment, Identifier [Axis]: ATS Workholding, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		3,725,862	[3]	3,725,862	[4]
Cost		$ 3,726	[3]	$ 3,726	[4]
Fair value		$ 0	[3]	$ 0	[4]
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		5%	[3],[13]	5%	[4],[33]
Principal		$ 1,922	[3],[13]	$ 1,901	[4],[33]
Cost		1,922	[3],[13]	1,901	[4],[33]
Fair value		$ 523	[3],[13]	$ 634	[4],[33]
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		5%	[3],[13]	5%	[4],[33]
Principal		$ 3,015	[3],[13]	$ 3,015	[4],[33]
Cost		2,855	[3],[13]	2,857	[4],[33]
Fair value		$ 820	[3],[13]	$ 1,005	[4],[33]
Investment, Identifier [Axis]: ATX Networks Corp., Common Stock
Schedule of Investments [Line Items]
Units (in shares)	[10]			583
Cost	[10]			$ 0
Fair value	[10]			$ 3,270
Investment, Identifier [Axis]: ATX Networks Corp., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[10],[27]			12.23%
Reference Rate and Spread		7.50%		7.50%	[10],[27]
Principal	[10],[27]			$ 6,783
Cost	[10],[27]			6,208
Fair value	[10],[27]			$ 6,343
Investment, Identifier [Axis]: ATX Networks Corp., Unsecured Debt
Schedule of Investments [Line Items]
Total Rate	[10]			10%
PIK Rate		10%		10%	[10]
Principal	[10]			$ 3,396
Cost	[10]			2,291
Fair value	[10]			$ 2,598
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Common Equity
Schedule of Investments [Line Items]
Units (in shares)		984	[3]	360	[4]
Cost		$ 965	[3]	$ 360	[4]
Fair value		$ 1,011	[3]	$ 406	[4]
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[3],[11],[14]	12.52%
Reference Rate and Spread		7.75%	[3],[11],[14]	7.25%	[4],[26],[27],[28]
Principal		$ 2,210	[3],[11],[14]	$ 0	[4],[26],[27],[28]
Cost		2,068	[3],[11],[14]	(57)	[4],[26],[27],[28]
Fair value		$ 2,120	[3],[11],[14]	$ (57)	[4],[26],[27],[28]
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.61%	[3],[11],[14]	12.17%	[4],[26],[27]
Reference Rate and Spread		7.75%	[3],[11],[14]	7.25%	[4],[26],[27]
Principal		$ 28,999	[3],[11],[14]	$ 29,071	[4],[26],[27]
Cost		27,913	[3],[11],[14]	27,927	[4],[26],[27]
Fair value		$ 27,808	[3],[11],[14]	$ 27,927	[4],[26],[27]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.50%	[3],[11]	13.23%	[4],[27]
Reference Rate and Spread		7.50%	[3],[11]	8.50%	[4],[27]
Principal		$ 1,678	[3],[11]	$ 1,678	[4],[27]
Cost		1,670	[3],[11]	1,669	[4],[27]
Fair value		$ 1,678	[3],[11]	$ 1,678	[4],[27]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.50%	[3],[11]	13.23%	[4],[27]
Reference Rate and Spread		7.50%	[3],[11]	8.50%	[4],[27]
Principal		$ 9,756	[3],[11]	$ 9,891	[4],[27]
Cost		9,696	[3],[11]	9,825	[4],[27]
Fair value		$ 9,756	[3],[11]	$ 9,891	[4],[27]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		19.50%	[3],[11]	16.17%	[4],[27]
Reference Rate and Spread		11.50%	[3],[11]	12.50%	[4],[27]
Principal		$ 796	[3],[11]	$ 807	[4],[27]
Cost		790	[3],[11]	800	[4],[27]
Fair value		$ 796	[3],[11]	$ 807	[4],[27]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		14.13%	[3],[11]	13.88%	[4],[27]
Reference Rate and Spread		9.50%	[3],[11]	9.50%	[4],[27]
Principal		$ 14,618	[3],[11]	$ 14,618	[4],[27]
Cost		14,308	[3],[11]	14,291	[4],[27]
Fair value		$ 14,618	[3],[11]	$ 14,618	[4],[27]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.13%	[3],[11]	13.57%	[4],[27]
Reference Rate and Spread		9.50%	[3],[11]	9%	[4],[27]
Principal		$ 728	[3],[11]	$ 4,368	[4],[27]
Cost		710	[3],[11]	4,270	[4],[27]
Fair value		$ 728	[3],[11]	$ 4,368	[4],[27]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[3],[11]	14.13%
Reference Rate and Spread	[3],[11]	9.50%
Principal	[3],[11]	$ 4,368
Cost	[3],[11]	4,275
Fair value	[3],[11]	$ 4,368
Investment, Identifier [Axis]: Acumera, Inc., Warrants
Schedule of Investments [Line Items]
Units (in shares)	[3],[34]	21,226
Cost	[3],[34]	$ 0
Fair value	[3],[34]	$ 0
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10%	[3],[11],[35]	10%	[4],[27],[36]
Reference Rate and Spread		6.50%	[3],[11],[35]	6%	[4],[27],[36]
Principal		$ 7,488	[3],[11],[35]	$ 4,729	[4],[27],[36]
Cost		7,488	[3],[11],[35]	4,729	[4],[27],[36]
Fair value		$ 7,176	[3],[11],[35]	$ 4,729	[4],[27],[36]
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10%	[3],[11],[37]	10%	[4],[27],[36]
Reference Rate and Spread		7.50%	[3],[11],[37]	7.50%	[4],[27],[36]
Principal		$ 23,024	[3],[11],[37]	$ 24,086	[4],[27],[36]
Cost		22,974	[3],[11],[37]	24,033	[4],[27],[36]
Fair value		$ 23,024	[3],[11],[37]	$ 24,086	[4],[27],[36]
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6%	[3],[11],[32]	6%	[4],[27],[28]
Principal		$ 0	[3],[11],[32]	$ 0	[4],[27],[28]
Cost		(10)	[3],[11],[32]	(10)	[4],[27],[28]
Fair value		$ (10)	[3],[11],[32]	$ (10)	[4],[27],[28]
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.12%	[3],[11]	11.12%	[4],[27]
Reference Rate and Spread		6%	[3],[11]	6%	[4],[27]
Principal		$ 6,600	[3],[11]	$ 6,617	[4],[27]
Cost		6,552	[3],[11]	6,565	[4],[27]
Fair value		$ 6,600	[3],[11]	$ 6,617	[4],[27]
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.49%	[3],[11],[14]	10.46%	[4],[26],[27]
Reference Rate and Spread		6.75%	[3],[11],[14]	6.75%	[4],[26],[27]
PIK Rate	[3],[11],[14]	1%
Principal		$ 14,839	[3],[11],[14]	$ 15,628	[4],[26],[27]
Cost		14,648	[3],[11],[14]	15,408	[4],[26],[27]
Fair value		$ 12,721	[3],[11],[14]	$ 14,606	[4],[26],[27]
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.49%	[3],[11],[14]	12.46%	[4],[26],[27]
Reference Rate and Spread		8.75%	[3],[11],[14]	8.75%	[4],[26],[27]
PIK Rate	[3],[11],[14]	1%
Principal		$ 14,839	[3],[11],[14]	$ 15,628	[4],[26],[27]
Cost		14,648	[3],[11],[14]	15,408	[4],[26],[27]
Fair value		$ 12,684	[3],[11],[14]	$ 14,654	[4],[26],[27]
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		7.50%	[9],[13]	7.50%	[10],[33]
Reference Rate and Spread		6.50%	[9],[13]	6.50%	[10],[33]
Principal		$ 2,980	[9],[13]	$ 2,980	[10],[33]
Cost		2,980	[9],[13]	2,980	[10],[33]
Fair value		$ 153	[9],[13]	$ 168	[10],[33]
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		7.50%	[9],[11],[13]	7.50%	[10],[27],[33]
Reference Rate and Spread		6.50%	[9],[11],[13]	6.50%	[10],[27],[33]
Principal		$ 14,370	[9],[11],[13]	$ 14,370	[10],[27],[33]
Cost		13,706	[9],[11],[13]	13,706	[10],[27],[33]
Fair value		$ 736	[9],[11],[13]	$ 808	[10],[27],[33]
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		3,200		3,200
Total Rate		14.13%		14.13%
Cost		$ 3,200		$ 3,200
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		2,427		2,427
Cost		$ 2,427		$ 2,427
Fair value		$ 3,588		$ 3,504
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		10%	[11],[32]	10%	[27],[28]
Principal		$ 0	[11],[32]	$ 0	[27],[28]
Cost		(2)	[11],[32]	(3)	[27],[28]
Fair value		$ (2)	[11],[32]	$ (3)	[27],[28]
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.75%	[11]	14.13%	[27]
Reference Rate and Spread		10%	[11]	10%	[27]
Principal		$ 4,595	[11]	$ 4,665	[27]
Cost		4,495	[11]	4,545	[27]
Fair value		$ 4,495	[11]	$ 4,545	[27]
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Warrants
Schedule of Investments [Line Items]
Units (in shares)		420	[24]	420	[25]
Cost		$ 316	[24]	$ 316	[25]
Fair value		$ 0	[24]	$ 0	[25]
Investment, Identifier [Axis]: ArborWorks, LLC, Common Equity
Schedule of Investments [Line Items]
Units (in shares)		234	[3]	234	[4]
Cost		$ 234	[3]	$ 234	[4]
Fair value		$ 0	[3]	$ 0	[4]
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		14.83%	[3],[11],[14]	13.41%	[4],[27]
Reference Rate and Spread		7%	[3],[11],[14]	9%	[4],[27]
Principal		$ 4,678	[3],[11],[14]	$ 4,678	[4],[27]
Cost		4,576	[3],[11],[14]	4,569	[4],[27]
Fair value		$ 3,768	[3],[11],[14]	$ 3,945	[4],[27]
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.83%	[3],[11],[14]	13.56%	[4],[27]
Reference Rate and Spread		7%	[3],[11],[14]	9%	[4],[27]
Principal		$ 29,494	[3],[11],[14]	$ 29,722	[4],[27]
Cost		29,067	[3],[11],[14]	29,261	[4],[27]
Fair value		$ 23,755	[3],[11],[14]	$ 25,065	[4],[27]
Investment, Identifier [Axis]: Archer Systems, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		1,387,832	[3]	1,387,832	[4]
Cost		$ 1,388	[3]	$ 1,388	[4]
Fair value		$ 1,680	[3]	$ 1,388	[4]
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6%	[3],[11],[14],[32]	6.50%	[4],[26],[27],[28]
Principal		$ 0	[3],[11],[14],[32]	$ 0	[4],[26],[27],[28]
Cost		(127)	[3],[11],[14],[32]	(135)	[4],[26],[27],[28]
Fair value		$ (127)	[3],[11],[14],[32]	$ (135)	[4],[26],[27],[28]
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.72%	[3],[11],[14]	10.92%	[4],[26],[27]
Reference Rate and Spread		6%	[3],[11],[14]	6.50%	[4],[26],[27]
Principal		$ 65,171	[3],[11],[14]	$ 67,597	[4],[26],[27]
Cost		63,985	[3],[11],[14]	66,330	[4],[26],[27]
Fair value		$ 63,551	[3],[11],[14]	$ 66,511	[4],[26],[27]
Investment, Identifier [Axis]: Arrow International, Inc, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.15%	[3],[11],[38]	10.36%	[4],[26],[27],[39]
Reference Rate and Spread		5.40%	[3],[11],[38]	6.60%	[4],[26],[27],[39]
Principal		$ 36,000	[3],[11],[38]	$ 36,000	[4],[26],[27],[39]
Cost		35,759	[3],[11],[38]	35,737	[4],[26],[27],[39]
Fair value		$ 36,000	[3],[11],[38]	$ 36,000	[4],[26],[27],[39]
Investment, Identifier [Axis]: BBB Tank Services, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		800,000		800,000
Cost		$ 800		$ 800
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: BBB Tank Services, LLC, Preferred Stock (non-voting)
Schedule of Investments [Line Items]
Total Rate		15%		15%
Cost		$ 162		$ 162
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.66%	[11],[12]	15.12%	[27],[40]
Reference Rate and Spread		11%	[11],[12]	11%	[27],[40]
Principal		$ 800	[11],[12]	$ 800	[27],[40]
Cost		800	[11],[12]	800	[27],[40]
Fair value		$ 800	[11],[12]	$ 800	[27],[40]
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.66%	[11],[12]	15.12%	[27],[40]
Reference Rate and Spread		11%	[11],[12]	11%	[27],[40]
Principal		$ 4,000	[11],[12]	$ 4,000	[27],[40]
Cost		4,000	[11],[12]	4,000	[27],[40]
Fair value		$ 2,086	[11],[12]	$ 2,086	[27],[40]
Investment, Identifier [Axis]: Barfly Ventures, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		37	[3]	37	[4]
Cost		$ 1,584	[3]	$ 1,584	[4]
Fair value		$ 3,037	[3]	$ 3,320	[4]
Investment, Identifier [Axis]: Barfly Ventures, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		7%	[3]	7%	[4]
Principal		$ 711	[3]	$ 711	[4]
Cost		711	[3]	711	[4]
Fair value		$ 711	[3]	$ 711	[4]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Preferred Stock
Schedule of Investments [Line Items]
Units (in shares)		4,073	[30]	4,073	[31]
Cost		$ 4,095	[30]	$ 4,095	[31]
Fair value		6,150	[30]	4,095	[31]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[32]	0	[28]
Cost		(7)	[32]	(8)	[28]
Fair value		$ (7)	[32]	(8)	[28]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11%
Principal		$ 10,575		0	[28]
Cost		10,492		0	[28]
Fair value		$ 10,492		$ 0	[28]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11%		11%
Principal				$ 11,025
Cost				10,933
Fair value				$ 10,933
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		1,548,387	[3],[30],[41]	1,548,387	[4],[31],[42]
Total Rate		8%	[3],[30],[41]	8%	[4],[31],[42]
PIK Rate		8%	[3],[30],[41]	8%	[4],[31],[42]
Cost		$ 1,184	[3],[30],[41]	$ 1,161	[4],[31],[42]
Fair value		$ 5,544	[3],[30],[41]	$ 4,561	[4],[31],[42]
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		122,416	[3],[30],[32],[41]	122,416	[4],[28],[31],[42]
PIK Rate		16%	[3],[30],[32],[41]	16%	[4],[28],[31],[42]
Cost		$ 0	[3],[30],[32],[41]	$ 0	[4],[28],[31],[42]
Fair value		$ 340	[3],[30],[32],[41]	$ 270	[4],[28],[31],[42]
Investment, Identifier [Axis]: Berry Aviation, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%	[3]	12%	[4]
PIK Rate		1.50%	[3]	1.50%	[4]
Principal		$ 197	[3]	$ 195	[4]
Cost		197	[3]	195	[4]
Fair value		$ 197	[3]	$ 195	[4]
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		7%	[3],[11],[14],[32]	1%	[4],[26],[27],[28]
PIK Rate		6%	[3],[11],[14],[32]	6%	[4],[26],[27],[28]
Principal		$ 0	[3],[11],[14],[32]	$ 0	[4],[26],[27],[28]
Cost		(72)	[3],[11],[14],[32]	(76)	[4],[26],[27],[28]
Fair value		$ (72)	[3],[11],[14],[32]	$ (76)	[4],[26],[27],[28]
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.89%	[3],[11],[14]	11.40%	[4],[26],[27]
Reference Rate and Spread		7%	[3],[11],[14]	1%	[4],[26],[27]
PIK Rate		6%	[3],[11],[14]	6%	[4],[26],[27]
Principal		$ 27,919	[3],[11],[14]	$ 27,505	[4],[26],[27]
Cost		27,456	[3],[11],[14]	27,020	[4],[26],[27]
Fair value		$ 27,919	[3],[11],[14]	$ 27,505	[4],[26],[27]
Investment, Identifier [Axis]: Binswanger Enterprises, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		1,050,000	[3]	1,050,000	[4]
Cost		$ 1,050	[3]	$ 1,050	[4]
Fair value		$ 230	[3]	$ 420	[4]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Common Stock
Schedule of Investments [Line Items]
Units (in shares)		723,184	[9],[30]	723,184	[10],[31]
Cost		$ 1	[9],[30]	$ 1	[10],[31]
Fair value		$ 3,070	[9],[30]	$ 4,860	[10],[31]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[9],[11]	15.50%
Reference Rate and Spread		7.50%	[9],[11]	8.50%	[10],[27],[28]
PIK Rate	[9],[11]	14.50%
Principal		$ 1,211	[9],[11]	$ 0	[10],[27],[28]
Cost		1,211	[9],[11]	0	[10],[27],[28]
Fair value		$ 1,139	[9],[11]	$ 0	[10],[27],[28]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.07%	[9],[11]	12.94%	[10],[27]
Reference Rate and Spread		8.50%	[9],[11]	8.50%	[10],[27]
PIK Rate	[9],[11]	12.07%
Principal		$ 3,309	[9],[11]	$ 3,239	[10],[27]
Cost		2,440	[9],[11]	2,280	[10],[27]
Fair value		$ 3,111	[9],[11]	$ 3,139	[10],[27]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Warrants
Schedule of Investments [Line Items]
Units (in shares)		163,295	[9],[24]	163,295	[10],[25]
Cost		$ 1,036	[9],[24]	$ 1,036	[10],[25]
Fair value		$ 690	[9],[24]	$ 1,095	[10],[25]
Investment, Identifier [Axis]: Boccella Precast Products LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		2,160,000		2,160,000	[31]
Cost		$ 2,256		$ 2,256	[31]
Fair value		$ 2,770		$ 2,970	[31]
Investment, Identifier [Axis]: Boccella Precast Products LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10%		10%
Principal		$ 320		$ 320
Cost		320		320
Fair value		$ 320		$ 320
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Class B Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		140,000	[30]	140,000	[31]
Total Rate		8%	[30]	8%	[31]
Cost		$ 14,000	[30]	$ 14,000	[31]
Fair value		$ 31,420	[30]	$ 31,420	[31]
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.91%	[11],[14],[43]	13.39%	[26],[27],[44]
Reference Rate and Spread		9.22%	[11],[14],[43]	9.26%	[26],[27],[44]
Principal		$ 98,535	[11],[14],[43]	$ 99,194	[26],[27],[44]
Cost		97,952	[11],[14],[43]	98,576	[26],[27],[44]
Fair value		$ 98,535	[11],[14],[43]	$ 99,194	[26],[27],[44]
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.91%
Reference Rate and Spread		9.22%
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.50%	[11],[12],[13]	12.50%	[4],[27],[33],[40]
Reference Rate and Spread		9.25%	[11],[12],[13]	9.25%	[4],[27],[33],[40]
Principal		$ 761	[11],[12],[13]	$ 761	[4],[27],[33],[40]
Cost		761	[11],[12],[13]	761	[4],[27],[33],[40]
Fair value		$ 761	[11],[12],[13]	$ 761	[4],[27],[33],[40]
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%	[11],[12],[13]	12.50%	[4],[27],[33],[40]
Reference Rate and Spread		9.25%	[11],[12],[13]	9.25%	[4],[27],[33],[40]
Principal		$ 7,056	[11],[12],[13]	$ 7,056	[4],[27],[33],[40]
Cost		7,056	[11],[12],[13]	7,056	[4],[27],[33],[40]
Fair value		$ 2,134	[11],[12],[13]	$ 2,916	[4],[27],[33],[40]
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		2,950	[30]	2,950	[31]
Cost		$ 4,280	[30]	$ 4,280	[31]
Fair value		$ 6,560	[30]	$ 7,080	[31]
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.66%	[11]	14.12%	[27]
Reference Rate and Spread		10%	[11]	10%	[27]
Principal		$ 5,840	[11]	$ 5,964	[27]
Cost		5,840	[11]	5,964	[27]
Fair value		$ 5,840	[11]	$ 5,964	[27]
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)	[30],[41]	17,742
Cost	[30],[41]	$ 1,000
Fair value	[30],[41]	$ 1,000
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)	[31],[42]			17,742
Cost	[31],[42]			$ 1,000
Fair value	[31],[42]			$ 1,000
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13%		13%
Principal		$ 8,813		$ 8,813
Cost		8,813		8,813
Fair value		$ 8,813		$ 8,813
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%	[41]	13%	[42]
Principal		$ 1,000	[41]	$ 1,000	[42]
Cost		1,000	[41]	1,000	[42]
Fair value		$ 1,000	[41]	$ 1,000	[42]
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants
Schedule of Investments [Line Items]
Units (in shares)		82	[24]	82	[25]
Cost		$ 2,132	[24]	$ 2,132	[25]
Fair value		$ 4,340	[24]	$ 4,340	[25]
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund III, LP)
Schedule of Investments [Line Items]
Units (percentage)		1.55%	[5],[6],[45]	1.55%	[7],[8],[31],[46]
Cost		$ 7,062	[5],[6],[45]	$ 7,062	[7],[8],[31],[46]
Fair value		$ 4,586	[5],[6],[45]	$ 4,727	[7],[8],[31],[46]
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund IV, LP)
Schedule of Investments [Line Items]
Units (percentage)		0.59%	[5],[6],[30],[45]	0.59%	[7],[8],[31],[46]
Cost		$ 4,350	[5],[6],[30],[45]	$ 4,350	[7],[8],[31],[46]
Fair value		$ 4,664	[5],[6],[30],[45]	$ 4,541	[7],[8],[31],[46]
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund V, LP)
Schedule of Investments [Line Items]
Units (percentage)		1.31%	[5],[6],[45]	1.31%	[7],[8],[46]
Cost		$ 2,000	[5],[6],[45]	$ 2,000	[7],[8],[46]
Fair value		$ 2,280	[5],[6],[45]	$ 2,229	[7],[8],[46]
Investment, Identifier [Axis]: Buca C, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		6		6
Total Rate		6%		6%
PIK Rate		6%		6%
Cost		$ 4,770		$ 4,770
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		9%
Principal		$ 16,980		$ 17,355
Cost		16,980		17,355
Fair value		$ 11,962		$ 12,337
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[3],[11]	9.83%
Reference Rate and Spread		5%	[3],[11]	5%	[4],[27],[28]
Principal		$ 774	[3],[11]	$ 0	[4],[27],[28]
Cost		749	[3],[11]	(28)	[4],[27],[28]
Fair value		$ 774	[3],[11]	$ 0	[4],[27],[28]
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		9.63%	[3],[11]	8.91%	[4],[27]
Reference Rate and Spread		5%	[3],[11]	5%	[4],[27]
Principal		$ 19,832	[3],[11]	$ 19,933	[4],[27]
Cost		19,568	[3],[11]	19,656	[4],[27]
Fair value		$ 19,832	[3],[11]	$ 19,933	[4],[27]
Investment, Identifier [Axis]: CAI Software LLC, Preferred Equity 1
Schedule of Investments [Line Items]
Units (in shares)		1,788,527		1,788,527	[31]
Cost		$ 1,789		$ 1,789	[31]
Fair value		$ 1,789		$ 1,789	[31]
Investment, Identifier [Axis]: CAI Software LLC, Preferred Equity 2
Schedule of Investments [Line Items]
Units (in shares)		596,176		596,176
Cost		$ 0		$ 0
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: CBT Nuggets, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		416	[30]	416	[31]
Cost		$ 1,300	[30]	$ 1,300	[31]
Fair value		$ 49,860	[30]	$ 49,002	[31]
Investment, Identifier [Axis]: CMS Minerals Investments, Member Units
Schedule of Investments [Line Items]
Units (in shares)		100	[30],[41]	100	[31],[42]
Cost		$ 1,300	[30],[41]	$ 1,304	[31],[42]
Fair value		$ 1,235	[30],[41]	$ 1,670	[31],[42]
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[4],[27],[47]			11.99%
Reference Rate and Spread	[4],[27],[47]			8.50%
PIK Rate	[4],[27],[47]			0.01%
Principal	[4],[27],[47]			$ 28,328
Cost	[4],[27],[47]			28,264
Fair value	[4],[27],[47]			$ 28,328
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[3],[11]	13.14%
Reference Rate and Spread	[3],[11]	6.50%
PIK Rate	[3],[11]	2%
Principal	[3],[11]	$ 14,373
Cost	[3],[11]	14,351
Fair value	[3],[11]	$ 14,373
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[3],[11]	13.14%
Reference Rate and Spread	[3],[11]	6.50%
PIK Rate	[3],[11]	2%
Principal	[3],[11]	$ 4,472
Cost	[3],[11]	4,465
Fair value	[3],[11]	$ 4,472
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[3],[11]	13.33%
Reference Rate and Spread	[3],[11]	6.50%
PIK Rate	[3],[11]	2%
Principal	[3],[11]	$ 5,883
Cost	[3],[11]	5,873
Fair value	[3],[11]	$ 5,883
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[3],[11]	13.23%
Reference Rate and Spread	[3],[11]	6.50%
PIK Rate	[3],[11]	2%
Principal	[3],[11]	$ 1,687
Cost	[3],[11]	1,685
Fair value	[3],[11]	$ 1,687
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 5
Schedule of Investments [Line Items]
Total Rate	[3],[11]	13.33%
Reference Rate and Spread	[3],[11]	6.50%
PIK Rate	[3],[11]	2%
Principal	[3],[11]	$ 2,476
Cost	[3],[11]	2,472
Fair value	[3],[11]	$ 2,476
Investment, Identifier [Axis]: Café Brazil, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		1,233	[30]	1,233	[31]
Cost		$ 1,742	[30]	$ 1,742	[31]
Fair value		$ 1,840	[30]	$ 2,210	[31]
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		6,157	[30]	6,157	[31]
Cost		$ 10,775	[30]	$ 10,775	[31]
Fair value		$ 25,495	[30]	$ 25,495	[31]
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		3,671	[30]	3,671	[31]
Total Rate		15%	[30]	15%	[31]
PIK Rate		15%	[30]	15%	[31]
Cost		$ 4,144	[30]	$ 3,994	[31]
Fair value		$ 4,144	[30]	$ 3,994	[31]
Investment, Identifier [Axis]: California Splendor Holdings LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.88%	[11]	13.75%	[27]
Reference Rate and Spread		10%	[11]	10%	[27]
Principal		$ 28,000	[11]	$ 28,000	[27]
Cost		27,954	[11]	27,951	[27]
Fair value		$ 28,000	[11]	$ 28,000	[27]
Investment, Identifier [Axis]: Camin Cargo Control, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.34%	[9],[11],[14]	10.88%	[10],[27]
Reference Rate and Spread		6.50%	[9],[11],[14]	6.50%	[10],[27]
Principal		$ 15,178	[9],[11],[14]	$ 15,218	[10],[27]
Cost		15,079	[9],[11],[14]	15,110	[10],[27]
Fair value		$ 14,646	[9],[11],[14]	$ 14,685	[10],[27]
Investment, Identifier [Axis]: Career Team Holdings, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		450,000		450,000
Cost		$ 4,500		$ 4,500
Fair value		$ 4,500		$ 4,500
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6%	[11],[32]	6%	[27],[28]
Principal		$ 0	[11],[32]	$ 0	[27],[28]
Cost		(9)	[11],[32]	(9)	[27],[28]
Fair value		$ (9)	[11],[32]	$ (9)	[27],[28]
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%		12.50%
Principal		$ 20,250		$ 20,250
Cost		20,100		20,090
Fair value		$ 20,100		$ 20,090
Investment, Identifier [Axis]: CaseWorthy, Inc., Common Equity
Schedule of Investments [Line Items]
Units (in shares)		245,926	[3]	245,926	[4]
Cost		$ 246	[3]	$ 246	[4]
Fair value		$ 246	[3]	$ 246	[4]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6%	[3],[11],[32]	6%	[4],[27],[28]
Principal		$ 0	[3],[11],[32]	$ 0	[4],[27],[28]
Cost		(10)	[3],[11],[32]	(11)	[4],[27],[28]
Fair value		$ (10)	[3],[11],[32]	$ (11)	[4],[27],[28]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.73%	[3],[11]	10.73%	[4],[27]
Reference Rate and Spread		6%	[3],[11]	6%	[4],[27]
Principal		$ 7,993	[3],[11]	$ 7,993	[4],[27]
Cost		7,919	[3],[11]	7,914	[4],[27]
Fair value		$ 7,919	[3],[11]	$ 7,914	[4],[27]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.73%	[3],[11]	10.48%	[4],[27]
Reference Rate and Spread		6%	[3],[11]	5.75%	[4],[27]
Principal		$ 6,133	[3],[11]	$ 6,133	[4],[27]
Cost		6,083	[3],[11]	6,079	[4],[27]
Fair value		$ 6,133	[3],[11]	$ 6,133	[4],[27]
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		13,309		13,309
Cost		$ 6,122		$ 6,122
Fair value		$ 9,260		$ 8,700
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		9%	[11],[32]	9%	[27],[28]
Principal		$ 0	[11],[32]	$ 0	[27],[28]
Cost		0	[11],[32]	0	[27],[28]
Fair value		$ 0	[11],[32]	$ 0	[27],[28]
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.75%	[11]	13.13%	[27]
Reference Rate and Spread		9%	[11]	9%	[27]
Principal		$ 15,030	[11]	$ 15,030	[27]
Cost		14,960	[11]	14,954	[27]
Fair value		$ 14,960	[11]	$ 14,954	[27]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		4,347	[30]	4,347	[31]
Cost		$ 11,440	[30]	$ 11,440	[31]
Fair value		$ 22,800	[30]	$ 22,920	[31]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		1,047,146	[30],[41]	1,047,146	[31],[42]
Cost		$ 1,773	[30],[41]	$ 1,773	[31],[42]
Fair value		$ 2,830	[30],[41]	$ 2,710	[31],[42]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6%	[11],[14],[32]	6%	[27],[28]
Principal		$ 0	[11],[14],[32]	$ 0	[27],[28]
Cost		0	[11],[14],[32]	0	[27],[28]
Fair value		$ 0	[11],[14],[32]	$ 0	[27],[28]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.86%	[11],[14]	12.13%	[27]
Reference Rate and Spread		8%	[11],[14]	8%	[27]
Principal		$ 16,945	[11],[14]	$ 16,945	[27]
Cost		16,940	[11],[14]	16,935	[27]
Fair value		$ 16,945	[11],[14]	$ 16,945	[27]
Investment, Identifier [Axis]: Chandler Signs Holdings, LLC, Class A Units
Schedule of Investments [Line Items]
Units (in shares)		1,500,000	[3]	1,500,000	[4]
Cost		$ 1,500	[3]	$ 1,500	[4]
Fair value		$ 2,000	[3]	$ 1,790	[4]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.06%	[3],[11],[14],[48]	10.72%	[4],[26],[27],[49]
Reference Rate and Spread		6.25%	[3],[11],[14],[48]	6.25%	[4],[26],[27],[49]
Principal		$ 1,868	[3],[11],[14],[48]	$ 1,868	[4],[26],[27],[49]
Cost		1,773	[3],[11],[14],[48]	1,767	[4],[26],[27],[49]
Fair value		$ 1,830	[3],[11],[14],[48]	$ 1,841	[4],[26],[27],[49]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.08%	[3],[11],[14],[48]	10.71%	[4],[26],[27],[50]
Reference Rate and Spread		6.25%	[3],[11],[14],[48]	6.25%	[4],[26],[27],[50]
Principal		$ 38,918	[3],[11],[14],[48]	$ 39,047	[4],[26],[27],[50]
Cost		38,307	[3],[11],[14],[48]	38,396	[4],[26],[27],[50]
Fair value		$ 38,110	[3],[11],[14],[48]	$ 38,484	[4],[26],[27],[50]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[3],[11],[14]	11.14%
Reference Rate and Spread	[3],[11],[14]	6.25%
Principal	[3],[11],[14]	$ 4,930
Cost	[3],[11],[14]	4,804
Fair value	[3],[11],[14]	$ 4,828
Investment, Identifier [Axis]: Charps, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		1,829	[30]	1,829	[31]
Cost		$ 1,963	[30]	$ 1,963	[31]
Fair value		$ 13,550	[30]	$ 13,340	[31]
Investment, Identifier [Axis]: Charps, LLC, Unsecured Debt
Schedule of Investments [Line Items]
Total Rate		10%		10%
Principal		$ 5,694		$ 5,694
Cost		4,652		4,643
Fair value		$ 5,694		$ 5,694
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		717	[30]	717	[31]
Cost		$ 7,280	[30]	$ 7,280	[31]
Fair value		$ 7,170	[30]	$ 8,220	[31]
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		800	[41]	800	[42]
Cost		$ 210	[41]	$ 210	[42]
Fair value		$ 830	[41]	$ 610	[42]
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		9%	[11],[14],[32]	9%	[26],[27],[28]
Principal		$ 0	[11],[14],[32]	$ 0	[26],[27],[28]
Cost		0	[11],[14],[32]	0	[26],[27],[28]
Fair value		$ 0	[11],[14],[32]	$ 0	[26],[27],[28]
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.79%	[11],[14]	13.23%	[26],[27]
Reference Rate and Spread		9%	[11],[14]	9%	[26],[27]
Principal		$ 10,000	[11],[14]	$ 10,480	[26],[27]
Cost		9,971	[11],[14]	10,440	[26],[27]
Fair value		$ 9,971	[11],[14]	$ 10,440	[26],[27]
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10%		10%
Principal		$ 1,040		$ 1,049
Cost		1,031		1,039
Fair value		$ 1,031		$ 1,039
Investment, Identifier [Axis]: Clarius BIGS, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15%	[3],[12],[13]	15%	[4],[33],[40]
PIK Rate		15%	[3],[12],[13]	15%	[4],[33],[40]
Principal		$ 2,696	[3],[12],[13]	$ 2,712	[4],[33],[40]
Cost		2,696	[3],[12],[13]	2,712	[4],[33],[40]
Fair value		$ 25	[3],[12],[13]	$ 19	[4],[33],[40]
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		154	[30]	154	[31]
Cost		$ 5,760	[30]	$ 5,760	[31]
Fair value		$ 25,700	[30]	$ 24,637	[31]
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.88%	[11]	9.75%	[27]
Reference Rate and Spread		6%	[11]	6%	[27]
Principal		$ 4,560	[11]	$ 4,560	[27]
Cost		4,560	[11]	4,560	[27]
Fair value		$ 4,560	[11]	$ 4,560	[27]
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		8%		8%
Principal		$ 19,274		$ 19,274
Cost		19,192		19,182
Fair value		$ 19,274		$ 19,274
Investment, Identifier [Axis]: Cody Pools, Inc., Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		587	[30],[41]	587	[31],[42]
Cost		$ 8,317	[30],[41]	$ 8,317	[31],[42]
Fair value		$ 59,150	[30],[41]	$ 58,180	[31],[42]
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.50%	[11]	15.38%	[27]
Reference Rate and Spread		10.50%	[11]	10.50%	[27]
Principal		$ 1,054	[11]	$ 1,462	[27]
Cost		1,024	[11]	1,443	[27]
Fair value		$ 1,054	[11]	$ 1,462	[27]
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.50%	[11]	15.38%	[27]
Reference Rate and Spread		10.50%	[11]	10.50%	[27]
Principal		$ 40,377	[11]	$ 40,801	[27]
Cost		40,117	[11]	40,521	[27]
Fair value		$ 40,377	[11]	$ 40,801	[27]
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		17,280		17,280	[31]
Cost		$ 7,680		$ 7,680	[31]
Fair value		8,200		9,160	[31]
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[32]	0	[28]
Cost		0	[32]	0	[28]
Fair value		$ 0	[32]	$ 0	[28]
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal		$ 22,995		$ 23,310
Cost		22,850		23,151
Fair value		$ 22,850		$ 23,151
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		1,975	[30]	1,975	[31]
Cost		$ 1,975	[30]	$ 1,975	[31]
Fair value		$ 18,440	[30]	$ 19,830	[31]
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[11]	13.75%
Reference Rate and Spread	[11]	9%
Principal	[11]	$ 4,869
Cost	[11]	4,862
Fair value	[11]	$ 4,869
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		9%		9%	[27],[28],[40]
Principal	[27],[28],[40]			$ 0
Cost	[27],[28],[40]			0
Fair value	[27],[28],[40]			$ 0
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.75%		13.13%	[27]
Reference Rate and Spread		9%		9%	[27]
Principal	[27]			$ 5,241
Cost	[27]			5,232
Fair value	[27]			$ 5,241
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.34%	[3],[11],[51]	12.56%	[4],[27],[52]
Reference Rate and Spread		7.50%	[3],[11],[51]	8%	[4],[27],[52]
Principal		$ 5,000	[3],[11],[51]	$ 5,000	[4],[27],[52]
Cost		4,933	[3],[11],[51]	4,928	[4],[27],[52]
Fair value		$ 4,559	[3],[11],[51]	$ 4,621	[4],[27],[52]
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.35%	[3],[11]	12.56%	[4],[27]
Reference Rate and Spread		7.50%	[3],[11]	8%	[4],[27]
Principal		$ 18,588	[3],[11]	$ 18,588	[4],[27]
Cost		18,334	[3],[11]	18,315	[4],[27]
Fair value		$ 16,948	[3],[11]	$ 17,178	[4],[27]
Investment, Identifier [Axis]: Congruent Credit Opportunities Funds, LP Interests (Congruent Credit Opportunities Fund III, LP)
Schedule of Investments [Line Items]
Units (percentage)		13.32%	[5],[6],[30],[45]	13.32%	[7],[8],[31],[46]
Cost		$ 7,220	[5],[6],[30],[45]	$ 8,096	[7],[8],[31],[46]
Fair value		$ 6,781	[5],[6],[30],[45]	$ 7,657	[7],[8],[31],[46]
Investment, Identifier [Axis]: Construction Supply Investments, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		861,618	[3]	861,618	[4],[31]
Cost		$ 3,335	[3]	$ 3,335	[4],[31]
Fair value		$ 23,650	[3]	$ 21,165	[4],[31]
Investment, Identifier [Axis]: Copper Trail Fund Investments, LP Interests (CTMH, LP)
Schedule of Investments [Line Items]
Units (percentage)		38.75%	[5],[6],[45]	38.75%	[7],[8],[46]
Cost		$ 588	[5],[6],[45]	$ 588	[7],[8],[46]
Fair value		$ 588	[5],[6],[45]	$ 588	[7],[8],[46]
Investment, Identifier [Axis]: DMA Industries, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		5,944		5,944
Cost		$ 5,944		$ 5,944
Fair value		$ 7,260		$ 7,260
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal		$ 21,200		$ 21,200
Cost		21,046		21,035
Fair value		$ 21,200		$ 21,200
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class A Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		776,316	[3]	776,316	[4]
Total Rate		8%	[3]	8%	[4]
PIK Rate		8%	[3]	8%	[4]
Cost		$ 776	[3]	$ 776	[4]
Fair value		$ 380	[3]	$ 380	[4]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class AA Preferred Member Units (non-voting)
Schedule of Investments [Line Items]
Total Rate		10%	[3],[30]	10%	[4],[31]
PIK Rate		10%	[3],[30]	10%	[4],[31]
Cost		$ 1,190	[3],[30]	$ 1,161	[4],[31]
Fair value		$ 1,190	[3],[30]	$ 1,161	[4],[31]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		7.50%	[3],[11],[32]	7.50%	[4],[27],[28]
Principal		$ 0	[3],[11],[32]	$ 0	[4],[27],[28]
Cost		0	[3],[11],[32]	(1)	[4],[27],[28]
Fair value		$ 0	[3],[11],[32]	$ (1)	[4],[27],[28]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.44%	[3],[11]	12.24%	[4],[27]
Reference Rate and Spread		7.50%	[3],[11]	7.50%	[4],[27]
Principal		$ 5,634	[3],[11]	$ 6,074	[4],[27]
Cost		5,632	[3],[11]	6,065	[4],[27]
Fair value		$ 5,634	[3],[11]	$ 5,934	[4],[27]
Investment, Identifier [Axis]: Dalton US Inc., Common Stock
Schedule of Investments [Line Items]
Units (in shares)		201	[3]	201	[4]
Cost		$ 201	[3]	$ 201	[4]
Fair value		$ 201	[3]	$ 201	[4]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.33%	[3],[11],[14],[53]	11.90%	[4],[26],[27]
Reference Rate and Spread		7.50%	[3],[11],[14],[53]	8%	[4],[26],[27]
Principal		$ 3,212	[3],[11],[14],[53]	$ 1,092	[4],[26],[27]
Cost		3,003	[3],[11],[14],[53]	871	[4],[26],[27]
Fair value		$ 3,129	[3],[11],[14],[53]	$ 1,077	[4],[26],[27]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 2
Schedule of Investments [Line Items]
Reference Rate and Spread		7.50%	[3],[11],[14],[32]	8%	[4],[26],[27],[28]
Principal		$ 0	[3],[11],[14],[32]	$ 0	[4],[26],[27],[28]
Cost		(70)	[3],[11],[14],[32]	(74)	[4],[26],[27],[28]
Fair value		$ (70)	[3],[11],[14],[32]	$ (74)	[4],[26],[27],[28]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.26%	[3],[11],[14]	12.56%	[4],[26],[27]
Reference Rate and Spread		7.50%	[3],[11],[14]	8%	[4],[26],[27]
Principal		$ 14,317	[3],[11],[14]	$ 14,389	[4],[26],[27]
Cost		14,068	[3],[11],[14]	14,125	[4],[26],[27]
Fair value		$ 13,944	[3],[11],[14]	$ 14,186	[4],[26],[27]
Investment, Identifier [Axis]: Datacom, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		9,000	[30]	9,000	[31]
Cost		$ 2,610	[30]	$ 2,610	[31]
Fair value		$ 2,670	[30]	$ 2,670	[31]
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		7.50%		7.50%
Principal		$ 450		$ 223
Cost		450		223
Fair value		$ 450		$ 223
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10%		7.50%
Principal		$ 8,555		$ 8,622
Cost		8,161		8,190
Fair value		$ 7,761		$ 7,789
Investment, Identifier [Axis]: Digital Products Holdings LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		3,857	[30]	3,857	[31]
Cost		$ 9,501	[30]	$ 9,501	[31]
Fair value		$ 9,835	[30]	$ 9,835	[31]
Investment, Identifier [Axis]: Digital Products Holdings LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.75%	[11]	14.13%	[27]
Reference Rate and Spread		10%	[11]	10%	[27]
Principal		$ 15,203	[11]	$ 15,533	[27]
Cost		15,203	[11]	15,523	[27]
Fair value		$ 15,203	[11]	$ 15,523	[27]
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Preferred Stock
Schedule of Investments [Line Items]
Units (in shares)		8,400	[30]	8,400	[31]
Cost		$ 8,400	[30]	$ 8,400	[31]
Fair value		21,700	[30]	$ 22,220	[31]
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread	[27],[28]			11%
Principal		0	[32]	$ 0	[27],[28]
Cost		(81)	[32]	(88)	[27],[28]
Fair value		$ 0	[32]	$ 0	[27],[28]
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14%		15.13%	[27]
Reference Rate and Spread	[27]			11%
Principal		$ 26,876		$ 27,267	[27]
Cost		26,744		27,122	[27]
Fair value		$ 26,876		$ 27,267	[27]
Investment, Identifier [Axis]: Dos Rios Partners, LP Interests (Dos Rios Partners - A, LP)
Schedule of Investments [Line Items]
Units (percentage)		6.43%	[5],[6],[45]	6.43%	[7],[8],[46]
Cost		$ 2,051	[5],[6],[45]	$ 2,051	[7],[8],[46]
Fair value		$ 2,898	[5],[6],[45]	$ 2,898	[7],[8],[46]
Investment, Identifier [Axis]: Dos Rios Partners, LP Interests (Dos Rios Partners, LP)
Schedule of Investments [Line Items]
Units (percentage)		20.24%	[5],[6],[45]	20.24%	[7],[8],[46]
Cost		$ 6,459	[5],[6],[45]	$ 6,459	[7],[8],[46]
Fair value		$ 9,283	[5],[6],[45]	$ 9,127	[7],[8],[46]
Investment, Identifier [Axis]: Dos Rios Stone Products LLC, Class A Preferred Units
Schedule of Investments [Line Items]
Units (in shares)		2,000,000	[3],[41]	2,000,000	[4],[42]
Cost		$ 2,000	[3],[41]	$ 2,000	[4],[42]
Fair value		$ 1,580	[3],[41]	$ 1,330	[4],[42]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Common Equity
Schedule of Investments [Line Items]
Units (in shares)		1,250,000	[3]	1,250,000	[4]
Cost		$ 0	[3]	$ 0	[4]
Fair value		$ 0	[3]	$ 0	[4]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Preferred Equity 1
Schedule of Investments [Line Items]
Units (in shares)		125,000	[3]	125,000	[4]
Cost		$ 128	[3]	$ 128	[4]
Fair value		$ 128	[3]	$ 128	[4]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Preferred Equity 2
Schedule of Investments [Line Items]
Units (in shares)		2,376,241	[3]	2,376,241	[4]
Cost		$ 0	[3]	$ 0	[4]
Fair value		$ 0	[3]	$ 0	[4]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		9.18%	[3],[11],[14]	9.18%	[4],[26],[27]
Reference Rate and Spread		4.50%	[3],[11],[14]	4.50%	[4],[26],[27]
PIK Rate		9.18%	[3],[11],[14]	9.18%	[4],[26],[27]
Principal		$ 1,875	[3],[11],[14]	$ 1,875	[4],[26],[27]
Cost		1,717	[3],[11],[14]	1,717	[4],[26],[27]
Fair value		$ 1,717	[3],[11],[14]	$ 1,717	[4],[26],[27]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.18%	[3],[11],[14]	11.18%	[4],[26],[27]
Reference Rate and Spread		6.50%	[3],[11],[14]	6.50%	[4],[26],[27]
PIK Rate		11.18%	[3],[11],[14]	11.18%	[4],[26],[27]
Principal		$ 1,875	[3],[11],[14]	$ 1,875	[4],[26],[27]
Cost		1,642	[3],[11],[14]	1,642	[4],[26],[27]
Fair value		$ 1,642	[3],[11],[14]	$ 1,642	[4],[26],[27]
Investment, Identifier [Axis]: EIG Fund Investments, LP Interests (EIG Global Private Debt Fund-A, L.P.)
Schedule of Investments [Line Items]
Units (in shares)		5,000,000	[5],[6],[30],[45]	5,000,000	[7],[8],[31],[46]
Cost		$ 1,023	[5],[6],[30],[45]	$ 1,060	[7],[8],[31],[46]
Fair value		$ 976	[5],[6],[30],[45]	$ 1,013	[7],[8],[31],[46]
Investment, Identifier [Axis]: EPIC Y-Grade Services, LP, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.96%	[9],[11]	10.70%	[10],[27]
Reference Rate and Spread		6%	[9],[11]	6%	[10],[27]
Principal		$ 6,806	[9],[11]	$ 6,823	[10],[27]
Cost		6,750	[9],[11]	6,764	[10],[27]
Fair value		$ 5,963	[9],[11]	$ 6,141	[10],[27]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.95%	[3],[11],[14]	11.73%	[4],[27]
Reference Rate and Spread		8%	[3],[11],[14]	7%	[4],[27]
Principal		$ 3,495	[3],[11],[14]	$ 3,346	[4],[27]
Cost		3,443	[3],[11],[14]	3,290	[4],[27]
Fair value		$ 3,384	[3],[11],[14]	$ 3,276	[4],[27]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.95%	[3],[11],[14]	11.73%	[4],[27]
Reference Rate and Spread		8%	[3],[11],[14]	7%	[4],[27]
Principal		$ 4,989	[3],[11],[14]	$ 5,021	[4],[27]
Cost		4,940	[3],[11],[14]	4,967	[4],[27]
Fair value		$ 4,830	[3],[11],[14]	$ 4,916	[4],[27]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.95%	[3],[11],[14]	11.73%	[4],[27]
Reference Rate and Spread		8%	[3],[11],[14]	7%	[4],[27]
Principal		$ 23,305	[3],[11],[14]	$ 23,456	[4],[27]
Cost		23,027	[3],[11],[14]	23,149	[4],[27]
Fair value		$ 22,564	[3],[11],[14]	$ 22,967	[4],[27]
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 1
Schedule of Investments [Line Items]
Units (in shares)		378		378
Cost		$ 7,603		$ 7,603
Fair value		$ 7,603		$ 7,603
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 2
Schedule of Investments [Line Items]
Units (in shares)		939	[41]	939	[42]
Cost		$ 1,558	[41]	$ 1,558	[42]
Fair value		$ 1,558	[41]	$ 1,558	[42]
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6%	[11],[14],[32]	6%	[26],[27],[28]
Principal		$ 0	[11],[14],[32]	$ 0	[26],[27],[28]
Cost		(8)	[11],[14],[32]	(9)	[26],[27],[28]
Fair value		$ (8)	[11],[14],[32]	$ (9)	[26],[27],[28]
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal		$ 18,773		$ 18,773
Cost		18,604		18,594
Fair value		$ 18,604		$ 18,594
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		9%		9%
Principal		$ 6,346		$ 6,357
Cost		6,284		6,294
Fair value		$ 6,284		$ 6,294
Investment, Identifier [Axis]: Emerald Technologies Acquisition Co, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.97%	[9],[11],[14]	10.67%	[10],[26],[27]
Reference Rate and Spread		6.25%	[9],[11],[14]	6.25%	[10],[26],[27]
Principal		$ 9,199	[9],[11],[14]	$ 9,258	[10],[26],[27]
Cost		9,049	[9],[11],[14]	9,099	[10],[26],[27]
Fair value		$ 8,739	[9],[11],[14]	$ 8,787	[10],[26],[27]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund IX, L.P.)
Schedule of Investments [Line Items]
Units (percentage)	[5],[6],[30],[45]	0.10%
Total Rate	[7],[8],[31],[46]			0.10%
Cost		$ 3,682	[5],[6],[30],[45]	$ 3,699	[7],[8],[31],[46]
Fair value		$ 2,148	[5],[6],[30],[45]	$ 2,019	[7],[8],[31],[46]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII Co-Investors, L.P.)
Schedule of Investments [Line Items]
Units (percentage)	[5],[6],[30],[45]	0.38%
Total Rate	[7],[8],[31],[46]			0.38%
Cost		$ 1,979	[5],[6],[30],[45]	$ 1,984	[7],[8],[31],[46]
Fair value		$ 950	[5],[6],[30],[45]	$ 1,037	[7],[8],[31],[46]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII, L.P.)
Schedule of Investments [Line Items]
Units (percentage)	[5],[6],[30],[45]	0.14%
Total Rate	[7],[8],[31],[46]			0.14%
Cost		$ 3,565	[5],[6],[30],[45]	$ 3,566	[7],[8],[31],[46]
Fair value		$ 2,091	[5],[6],[30],[45]	$ 2,092	[7],[8],[31],[46]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund X, L.P.)
Schedule of Investments [Line Items]
Units (percentage)	[5],[6],[30],[45]	0.15%
Total Rate	[7],[8],[31],[46]			0.15%
Cost		$ 8,165	[5],[6],[30],[45]	$ 8,236	[7],[8],[31],[46]
Fair value		$ 9,362	[5],[6],[30],[45]	$ 9,351	[7],[8],[31],[46]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund II, L.P.)
Schedule of Investments [Line Items]
Units (percentage)	[5],[6],[45]	0.84%
Total Rate	[7],[8],[46]			0.84%
Cost		$ 5,358	[5],[6],[45]	$ 5,358	[7],[8],[46]
Fair value		$ 1,688	[5],[6],[45]	$ 1,688	[7],[8],[46]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund III, L.P.)
Schedule of Investments [Line Items]
Units (percentage)	[5],[6],[30],[45]	0.25%
Total Rate	[7],[8],[31],[46]			0.25%
Cost		$ 5,749	[5],[6],[30],[45]	$ 6,023	[7],[8],[31],[46]
Fair value		$ 6,062	[5],[6],[30],[45]	$ 5,718	[7],[8],[31],[46]
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.43%	[3],[11],[14]	11.68%	[4],[26],[27]
Reference Rate and Spread		6.50%	[3],[11],[14]	6.50%	[4],[26],[27]
Principal		$ 983	[3],[11],[14]	$ 131	[4],[26],[27]
Cost		940	[3],[11],[14]	85	[4],[26],[27]
Fair value		$ 976	[3],[11],[14]	$ 131	[4],[26],[27]
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.43%	[3],[11],[14]	10.92%	[4],[26],[27]
Reference Rate and Spread		6.50%	[3],[11],[14]	6.50%	[4],[26],[27]
Principal		$ 16,256	[3],[11],[14]	$ 16,338	[4],[26],[27]
Cost		15,980	[3],[11],[14]	16,047	[4],[26],[27]
Fair value		$ 16,138	[3],[11],[14]	$ 16,338	[4],[26],[27]
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.73%	[3],[11],[14],[41]	10.67%	[4],[27],[42]
Reference Rate and Spread		7%	[3],[11],[14],[41]	7%	[4],[27],[42]
Principal		$ 3,692	[3],[11],[14],[41]	$ 3,692	[4],[27],[42]
Cost		3,665	[3],[11],[14],[41]	3,663	[4],[27],[42]
Fair value		$ 3,504	[3],[11],[14],[41]	$ 3,507	[4],[27],[42]
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.73%	[3],[11],[14],[41]	10.67%	[4],[27],[42]
Reference Rate and Spread		7%	[3],[11],[14],[41]	7%	[4],[27],[42]
Principal		$ 44,308	[3],[11],[14],[41]	$ 44,308	[4],[27],[42]
Cost		43,977	[3],[11],[14],[41]	43,955	[4],[27],[42]
Fair value		$ 42,045	[3],[11],[14],[41]	$ 42,083	[4],[27],[42]
Investment, Identifier [Axis]: Flame King Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		9,360	[30]	9,360	[31]
Cost		$ 10,400	[30]	$ 10,400	[31]
Fair value		$ 21,190	[30]	$ 17,580	[31]
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.25%	[11]	10.75%	[27]
Reference Rate and Spread		6.50%	[11]	6.50%	[27]
Principal		$ 7,600	[11]	$ 7,600	[27]
Cost		7,544	[11]	7,537	[27]
Fair value		$ 7,600	[11]	$ 7,600	[27]
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.75%	[11]	13.25%	[27]
Reference Rate and Spread		9%	[11]	9%	[27]
Principal		$ 21,200	[11]	$ 21,200	[27]
Cost		21,048	[11]	21,038	[27]
Fair value		$ 21,200	[11]	$ 21,200	[27]
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.55%	[3],[11],[14]	11.21%	[4],[26],[27]
Reference Rate and Spread		7.50%	[3],[11],[14]	7.50%	[4],[26],[27]
Principal		$ 982	[3],[11],[14]	$ 736	[4],[26],[27]
Cost		982	[3],[11],[14]	736	[4],[26],[27]
Fair value		$ 982	[3],[11],[14]	$ 736	[4],[26],[27]
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.55%	[3],[11],[14]	12.19%	[4],[26],[27]
Reference Rate and Spread		7.50%	[3],[11],[14]	7.50%	[4],[26],[27]
Principal		$ 11,095	[3],[11],[14]	$ 11,095	[4],[26],[27]
Cost		10,872	[3],[11],[14]	10,852	[4],[26],[27]
Fair value		$ 11,095	[3],[11],[14]	$ 11,095	[4],[26],[27]
Investment, Identifier [Axis]: Freeport Financial Funds, LP Interests (Freeport Financial SBIC Fund LP)
Schedule of Investments [Line Items]
Units (percentage)		9.30%	[5],[6],[45]	9.30%	[7],[8],[46]
Cost		$ 3,507	[5],[6],[45]	$ 3,507	[7],[8],[46]
Fair value		$ 3,483	[5],[6],[45]	$ 3,483	[7],[8],[46]
Investment, Identifier [Axis]: Freeport Financial Funds, LP Interests (Freeport First Lien Loan Fund III LP)
Schedule of Investments [Line Items]
Units (percentage)		5.95%	[5],[6],[30],[45]	5.95%	[7],[8],[31],[46]
Cost		$ 5,767	[5],[6],[30],[45]	$ 6,303	[7],[8],[31],[46]
Fair value		$ 5,312	[5],[6],[30],[45]	$ 5,848	[7],[8],[31],[46]
Investment, Identifier [Axis]: Fuse, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		10,429	[9]	10,429	[10]
Cost		$ 256	[9]	$ 256	[10]
Fair value		$ 0	[9]	$ 0	[10]
Investment, Identifier [Axis]: Fuse, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%	[9]	12%	[10]
Principal		$ 1,810	[9]	$ 1,810	[10]
Cost		1,810	[9]	1,810	[10]
Fair value		$ 1,512	[9]	$ 1,512	[10]
Investment, Identifier [Axis]: GFG Group, LLC., Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		226	[30]	226	[31]
Cost		$ 4,900	[30]	$ 4,900	[31]
Fair value		$ 7,590	[30]	$ 7,140	[31]
Investment, Identifier [Axis]: GFG Group, LLC., Secured Debt
Schedule of Investments [Line Items]
Total Rate		9%		9%
Principal		$ 11,345		$ 11,345
Cost		11,275		11,269
Fair value		$ 11,345		$ 11,345
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)	[31]			5,879
Cost	[31]			$ 13,065
Fair value	[31]			$ 44,440
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Member Units 2
Schedule of Investments [Line Items]
Units (in shares)	[30]	5,879
Cost	[30]	$ 13,065
Fair value	[30]	$ 44,440
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.66%		10.12%
Reference Rate and Spread		6%		6%
Principal		$ 965		$ 670
Cost		965		670
Fair value		$ 965		$ 670
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.66%		12.12%
Reference Rate and Spread		8%		8%
Principal		$ 40,493		$ 40,493
Cost		40,324		40,313
Fair value		$ 40,493		$ 40,493
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.46%	[3],[11]	11.20%	[4],[27]
Reference Rate and Spread		6.50%	[3],[11]	6.50%	[4],[27]
Principal		$ 1,136	[3],[11]	$ 2,177	[4],[27]
Cost		1,129	[3],[11]	2,169	[4],[27]
Fair value		$ 1,132	[3],[11]	$ 2,171	[4],[27]
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.46%	[3],[11]	11.24%	[4],[27]
Reference Rate and Spread		6.50%	[3],[11]	6.50%	[4],[27]
Principal		$ 10,707	[3],[11]	$ 10,734	[4],[27]
Cost		10,673	[3],[11]	10,695	[4],[27]
Fair value		$ 10,683	[3],[11]	$ 10,705	[4],[27]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.99%	[3],[11],[14],[54]	10.42%	[4],[26],[27]
Reference Rate and Spread		6%	[3],[11],[14],[54]	6%	[4],[26],[27]
Principal		$ 353	[3],[11],[14],[54]	$ 252	[4],[26],[27]
Cost		335	[3],[11],[14],[54]	233	[4],[26],[27]
Fair value		$ 353	[3],[11],[14],[54]	$ 252	[4],[26],[27]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[3],[11],[14]	11.11%
Reference Rate and Spread		6%	[3],[11],[14]	6%	[4],[26],[27],[28]
Principal		$ 303	[3],[11],[14]	$ 0	[4],[26],[27],[28]
Cost		286	[3],[11],[14]	(15)	[4],[26],[27],[28]
Fair value		$ 286	[3],[11],[14]	$ (15)	[4],[26],[27],[28]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.58%	[3],[11],[14]	10.73%	[4],[26],[27]
Reference Rate and Spread		6%	[3],[11],[14]	6%	[4],[26],[27]
Principal		$ 3,642	[3],[11],[14]	$ 3,661	[4],[26],[27]
Cost		3,576	[3],[11],[14]	3,591	[4],[26],[27]
Fair value		$ 3,642	[3],[11],[14]	$ 3,661	[4],[26],[27]
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		9,042	[30]	9,042	[31]
Cost		$ 17,692	[30]	$ 17,692	[31]
Fair value		$ 59,370	[30]	$ 50,890	[31]
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		8.50%	[11],[14],[32]	8.50%	[26],[27],[28]
Principal		$ 0	[11],[14],[32]	$ 0	[26],[27],[28]
Cost		0	[11],[14],[32]	0	[26],[27],[28]
Fair value		$ 0	[11],[14],[32]	$ 0	[26],[27],[28]
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.50%	[11],[14],[55]	11.50%	[26],[27]
Reference Rate and Spread		8.50%	[11],[14],[55]	8.50%	[26],[27]
Principal		$ 63,278	[11],[14],[55]	$ 64,078	[26],[27]
Cost		62,909	[11],[14],[55]	63,685	[26],[27]
Fair value		$ 63,278	[11],[14],[55]	$ 64,078	[26],[27]
Investment, Identifier [Axis]: Garreco, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		1,200	[30]	1,200	[31]
Cost		$ 1,200	[30]	$ 1,200	[31]
Fair value		$ 1,580	[30]	$ 1,800	[31]
Investment, Identifier [Axis]: Garreco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%	[11],[56]	9.50%	[27],[57]
Reference Rate and Spread		10%	[11],[56]	8%	[27],[57]
Principal		$ 3,549	[11],[56]	$ 3,826	[27],[57]
Cost		3,549	[11],[56]	3,826	[27],[57]
Fair value		$ 3,549	[11],[56]	$ 3,826	[27],[57]
Investment, Identifier [Axis]: GeoStabilization International (GSI), Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.17%	[9],[14]	9.44%	[10],[26]
Reference Rate and Spread		5.25%	[9],[14]	5.25%	[10],[26]
Principal		$ 20,444	[9],[14]	$ 20,497	[10],[26]
Cost		20,379	[9],[14]	20,427	[10],[26]
Fair value		$ 19,319	[9],[14]	$ 19,472	[10],[26]
Investment, Identifier [Axis]: Gulf Manufacturing, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		438	[30]	438	[31]
Cost		$ 2,980	[30]	$ 2,980	[31]
Fair value		$ 7,370	[30]	$ 6,790	[31]
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		3,681		3,681
Cost		$ 3,681		$ 3,681
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		63,720		63,720
Cost		$ 5,600		$ 5,600
Fair value		$ 3,780		$ 3,780
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		9.50%	[11],[32]	9.50%	[27],[28]
Principal		$ 0	[11],[32]	$ 0	[27],[28]
Cost		0	[11],[32]	0	[27],[28]
Fair value		$ 0	[11],[32]	$ 0	[27],[28]
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%		12.50%
Principal		$ 2,400		$ 2,400
Cost		2,400		2,400
Fair value		$ 2,284		$ 2,284
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		14.34%	[3],[11],[14]	14.34%	[4],[26],[27]
Reference Rate and Spread		9.50%	[3],[11],[14]	9.50%	[4],[26],[27]
PIK Rate		14.34%	[3],[11],[14]	2%	[4],[26],[27]
Principal		$ 332	[3],[11],[14]	$ 320	[4],[26],[27]
Cost		331	[3],[11],[14]	319	[4],[26],[27]
Fair value		$ 324	[3],[11],[14]	$ 311	[4],[26],[27]
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.34%	[3],[11],[14]	14.34%	[4],[26],[27]
Reference Rate and Spread		9.50%	[3],[11],[14]	9.50%	[4],[26],[27]
PIK Rate		14.34%	[3],[11],[14]	2%	[4],[26],[27]
Principal		$ 3,394	[3],[11],[14]	$ 3,277	[4],[26],[27]
Cost		3,384	[3],[11],[14]	3,262	[4],[26],[27]
Fair value		$ 3,308	[3],[11],[14]	$ 3,186	[4],[26],[27]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6.50%	[3],[11],[14],[32]	6.50%	[4],[26],[27],[28]
Principal		$ 0	[3],[11],[14],[32]	$ 0	[4],[26],[27],[28]
Cost		(59)	[3],[11],[14],[32]	(62)	[4],[26],[27],[28]
Fair value		$ (59)	[3],[11],[14],[32]	$ (62)	[4],[26],[27],[28]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 2
Schedule of Investments [Line Items]
Reference Rate and Spread		6.50%	[3],[11],[14],[32]	6.50%	[4],[26],[27],[28]
Principal		$ 0	[3],[11],[14],[32]	$ 0	[4],[26],[27],[28]
Cost		(59)	[3],[11],[14],[32]	(62)	[4],[26],[27],[28]
Fair value		$ (59)	[3],[11],[14],[32]	$ (62)	[4],[26],[27],[28]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.12%	[3],[11],[14]	10.62%	[4],[26],[27]
Reference Rate and Spread		6.50%	[3],[11],[14]	6.50%	[4],[26],[27]
Principal		$ 16,748	[3],[11],[14]	$ 16,791	[4],[26],[27]
Cost		16,458	[3],[11],[14]	16,483	[4],[26],[27]
Fair value		$ 16,748	[3],[11],[14]	$ 16,791	[4],[26],[27]
Investment, Identifier [Axis]: HOWLCO LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.92%	[6],[9],[11],[15]	10.69%	[8],[10],[16],[27]
Reference Rate and Spread		6%	[6],[9],[11],[15]	6%	[8],[10],[16],[27]
Principal		$ 25,226	[6],[9],[11],[15]	$ 25,290	[8],[10],[16],[27]
Cost		25,226	[6],[9],[11],[15]	25,290	[8],[10],[16],[27]
Fair value		$ 24,317	[6],[9],[11],[15]	$ 24,381	[8],[10],[16],[27]
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (2717 HPP-MS, L.P.)
Schedule of Investments [Line Items]
Units (percentage)		49.26%	[5],[6],[45]	49.26%	[7],[8],[46]
Cost		$ 248	[5],[6],[45]	$ 248	[7],[8],[46]
Fair value		$ 248	[5],[6],[45]	$ 248	[7],[8],[46]
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (2717 MH, L.P.)
Schedule of Investments [Line Items]
Units (percentage)		49.26%	[5],[6],[30],[45]	49.26%	[7],[8],[46]
Cost		$ 4,027	[5],[6],[30],[45]	$ 3,895	[7],[8],[46]
Fair value		$ 7,009	[5],[6],[30],[45]	$ 7,552	[7],[8],[46]
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (423 COR, LP)
Schedule of Investments [Line Items]
Units (percentage)		22.93%	[5],[6],[30],[45]	22.93%	[7],[8],[46]
Cost		$ 1,400	[5],[6],[30],[45]	$ 1,400	[7],[8],[46]
Fair value		$ 1,400	[5],[6],[30],[45]	$ 1,400	[7],[8],[46]
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (HPEP 3, L.P.)
Schedule of Investments [Line Items]
Units (percentage)		8.22%	[5],[6],[45]	8.22%	[7],[8],[46]
Cost		$ 2,050	[5],[6],[45]	$ 2,558	[7],[8],[46]
Fair value		$ 3,936	[5],[6],[45]	$ 4,331	[7],[8],[46]
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (HPEP 4, L.P.)
Schedule of Investments [Line Items]
Units (percentage)		8.71%	[5],[6],[45]	8.71%	[7],[8],[46]
Cost		$ 2,332	[5],[6],[45]	$ 2,332	[7],[8],[46]
Fair value		$ 2,332	[5],[6],[45]	$ 2,332	[7],[8],[46]
Investment, Identifier [Axis]: Harrison Hydra-Gen, Ltd., Common Stock
Schedule of Investments [Line Items]
Units (in shares)		107,456		107,456
Cost		$ 718		$ 718
Fair value		$ 3,490		$ 3,280
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		226	[30]	226	[31]
Cost		$ 2,850	[30]	$ 2,850	[31]
Fair value		$ 17,460	[30]	$ 17,460	[31]
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		226	[41]	226	[42]
Cost		$ 150	[41]	$ 150	[42]
Fair value		$ 920	[41]	$ 920	[42]
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.75%	[11]	10.13%	[27]
Reference Rate and Spread		6%	[11]	6%	[27]
Principal		$ 4,000	[11]	$ 3,185	[27]
Cost		3,998	[11]	3,183	[27]
Fair value		$ 4,000	[11]	$ 3,185	[27]
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10%		9%
Principal		$ 37,800		$ 37,800
Cost		37,694		37,685
Fair value		$ 37,800		$ 37,800
Investment, Identifier [Axis]: Heartland Dental, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.34%	[3],[11]	10.88%	[4],[27]
Reference Rate and Spread		6.50%	[3],[11]	6.50%	[4],[27]
Principal		$ 14,588	[3],[11]	$ 14,663	[4],[27]
Cost		14,381	[3],[11]	14,430	[4],[27]
Fair value		$ 13,676	[3],[11]	$ 13,599	[4],[27]
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		322,297		322,297
Cost		$ 2,352		$ 2,352
Fair value		$ 3,000		$ 2,400
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Unsecured Convertible Debt
Schedule of Investments [Line Items]
Total Rate		8%		8%
Principal		$ 3,000		$ 3,000
Cost		3,000		3,000
Fair value		$ 2,830		$ 3,000
Investment, Identifier [Axis]: Hybrid Promotions, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.10%	[3],[11],[14]	12.07%	[4],[26]
Reference Rate and Spread		8.25%	[3],[11],[14]	8.25%	[4],[26]
Principal		$ 7,088	[3],[11],[14]	$ 7,088	[4],[26]
Cost		6,993	[3],[11],[14]	6,986	[4],[26]
Fair value		$ 5,822	[3],[11],[14]	$ 6,144	[4],[26]
Investment, Identifier [Axis]: I-45 SLF LLC, Member Units (Fully diluted 20.0%; 21.75% profits interest)
Schedule of Investments [Line Items]
Units (percentage)	[5],[6],[30]	20%
Total Rate	[7],[8],[31]			20%
Cost		$ 20,200	[5],[6],[30]	$ 19,000	[7],[8],[31]
Fair value		$ 12,958	[5],[6],[30]	$ 11,758	[7],[8],[31]
Diluted, percentage		20%	[5],[6]	20%	[7],[8]
Profits, percentage		21.75%	[5],[6]	21.75%	[7],[8]
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[10],[26],[27],[58]			10.17%
Reference Rate and Spread	[10],[26],[27],[58]			5.75%
Principal	[10],[26],[27],[58]			$ 698
Cost	[10],[26],[27],[58]			670
Fair value	[10],[26],[27],[58]			$ 698
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[10],[26],[27]			10.17%
Reference Rate and Spread		5.75%	[9],[11],[14],[32]	5.75%	[10],[26],[27]
Principal		$ 0	[9],[11],[14],[32]	$ 14,499	[10],[26],[27]
Cost		(26)	[9],[11],[14],[32]	14,304	[10],[26],[27]
Fair value		$ 0	[9],[11],[14],[32]	$ 14,499	[10],[26],[27]
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[9],[11],[14]	10.59%
Reference Rate and Spread	[9],[11],[14]	5.75%
Principal	[9],[11],[14]	$ 14,475
Cost	[9],[11],[14]	14,289
Fair value	[9],[11],[14]	$ 14,320
Investment, Identifier [Axis]: INW Manufacturing, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.48%	[9],[11]	10.48%	[10],[27]
Reference Rate and Spread		5.75%	[9],[11]	5.75%	[10],[27]
Principal		$ 6,938	[9],[11]	$ 7,125	[10],[27]
Cost		6,794	[9],[11]	6,968	[10],[27]
Fair value		$ 5,978	[9],[11]	$ 6,092	[10],[27]
Investment, Identifier [Axis]: Implus Footcare, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.99%	[3],[11],[14]	13.98%	[4],[27]
Reference Rate and Spread		7.75%	[3],[11],[14]	7.75%	[4],[27]
PIK Rate		1.50%	[3],[11],[14]	1.50%	[4],[27]
Principal		$ 18,568	[3],[11],[14]	$ 18,515	[4],[27]
Cost		18,461	[3],[11],[14]	18,384	[4],[27]
Fair value		$ 16,895	[3],[11],[14]	$ 17,464	[4],[27]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		1,558,333	[3]	1,558,333	[4]
Cost		$ 1,558	[3]	$ 1,558	[4]
Fair value		$ 0	[3]	$ 0	[4]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Preferred Stock (non-voting) 1
Schedule of Investments [Line Items]
Total Rate		6%	[3]	6%	[4]
PIK Rate		6%	[3]	6%	[4]
Cost		$ 3,235	[3]	$ 3,235	[4]
Fair value		0	[3]	0	[4]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Preferred Stock (non-voting) 2
Schedule of Investments [Line Items]
Cost		0	[3]	0	[4]
Fair value		$ 0	[3]	$ 0	[4]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.25%	[3],[11]	13%	[4],[27],[59]
Reference Rate and Spread		7.50%	[3],[11]	5.50%	[4],[27],[59]
PIK Rate		15.25%	[3],[11]	13%	[4],[27],[59]
Principal		$ 7,294	[3],[11]	$ 7,027	[4],[27],[59]
Cost		7,294	[3],[11]	7,027	[4],[27],[59]
Fair value		$ 7,294	[3],[11]	$ 7,027	[4],[27],[59]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		6%	[3],[13]	6%	[4],[33]
PIK Rate		6%	[3],[13]	6%	[4],[33]
Principal		$ 18,428	[3],[13]	$ 18,428	[4],[33]
Cost		17,664	[3],[13]	17,664	[4],[33]
Fair value		$ 6,010	[3],[13]	$ 7,633	[4],[33]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		14.95%	[3],[14]	14.42%	[4],[26]
Reference Rate and Spread		10%	[3],[14]	10%	[4],[26]
PIK Rate		14.95%	[3],[14]	14.42%	[4],[26]
Principal		$ 2,378	[3],[14]	$ 806	[4],[26]
Cost		2,358	[3],[14]	769	[4],[26]
Fair value		$ 2,303	[3],[14]	$ 769	[4],[26]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[3],[14]	14.66%
Reference Rate and Spread	[3],[14]	10%
PIK Rate	[3],[14]	14.66%
Principal	[3],[14]	$ 2,474
Cost	[3],[14]	2,424
Fair value	[3],[14]	$ 2,397
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Warrants
Schedule of Investments [Line Items]
Units (in shares)		242,914	[3],[32],[60]	242,914	[4],[28],[61]
Cost		$ 0	[3],[32],[60]	$ 0	[4],[28],[61]
Fair value		$ 0	[3],[32],[60]	$ 0	[4],[28],[61]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		900	[3],[41]	900	[4],[42]
Cost		$ 900	[3],[41]	$ 900	[4],[42]
Fair value		$ 600	[3],[41]	$ 600	[4],[42]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		144	[3],[30],[41]	144	[4],[31],[42]
Total Rate		10%	[3],[30],[41]	10%	[4],[31],[42]
PIK Rate		10%	[3],[30],[41]	10%	[4],[31],[42]
Cost		$ 131	[3],[30],[41]	$ 129	[4],[31],[42]
Fair value		$ 147	[3],[30],[41]	$ 145	[4],[31],[42]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		80	[3],[30],[41]	80	[4],[31],[42]
Total Rate		20%	[3],[30],[41]	20%	[4],[31],[42]
PIK Rate		20%	[3],[30],[41]	20%	[4],[31],[42]
Cost		$ 94	[3],[30],[41]	$ 92	[4],[31],[42]
Fair value		$ 95	[3],[30],[41]	$ 93	[4],[31],[42]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.50%	[3],[11]	11.50%	[4],[27]
Reference Rate and Spread		6.75%	[3],[11]	6.75%	[4],[27]
Principal		$ 1,004	[3],[11]	$ 463	[4],[27]
Cost		973	[3],[11]	430	[4],[27]
Fair value		$ 1,004	[3],[11]	$ 463	[4],[27]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.50%	[3],[11]	11.50%	[4],[27]
Reference Rate and Spread		6.75%	[3],[11]	6.75%	[4],[27]
Principal		$ 19,190	[3],[11]	$ 19,239	[4],[27]
Cost		18,928	[3],[11]	18,956	[4],[27]
Fair value		$ 19,190	[3],[11]	$ 19,239	[4],[27]
Investment, Identifier [Axis]: Infinity X1 Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		80,000
Cost		$ 4,000
Fair value		$ 4,000
Investment, Identifier [Axis]: Infinity X1 Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13%
Principal		$ 18,000
Cost		17,823
Fair value		$ 17,823
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		5.50%	[3],[11],[32]	5.50%	[4],[27],[28]
Principal		$ 0	[3],[11],[32]	$ 0	[4],[27],[28]
Cost		(17)	[3],[11],[32]	(19)	[4],[27],[28]
Fair value		$ (17)	[3],[11],[32]	$ (19)	[4],[27],[28]
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.23%	[3],[11]	10.23%	[4],[27]
Reference Rate and Spread		5.50%	[3],[11]	5.50%	[4],[27]
Principal		$ 8,593	[3],[11]	$ 8,593	[4],[27]
Cost		8,469	[3],[11]	8,461	[4],[27]
Fair value		$ 8,593	[3],[11]	$ 8,593	[4],[27]
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		2,143	[3]	2,143	[4]
Cost		$ 0	[3]	$ 0	[4]
Fair value		$ 0	[3]	$ 0	[4]
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		14.76%	[3]	14.22%	[4],[62]
Reference Rate and Spread		10%	[3]	10%	[4],[62]
Principal		$ 1,835	[3]	$ 1,682	[4],[62]
Cost		1,835	[3]	1,682	[4],[62]
Fair value		$ 1,781	[3]	$ 1,682	[4],[62]
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.63%	[3],[11],[13]	12.07%	[4],[27],[33]
Reference Rate and Spread		7%	[3],[11],[13]	7%	[4],[27],[33]
PIK Rate		11.63%	[3],[11],[13]	1%	[4],[27],[33]
Principal		$ 7,313	[3],[11],[13]	$ 7,313	[4],[27],[33]
Cost		7,237	[3],[11],[13]	7,237	[4],[27],[33]
Fair value		$ 1,082	[3],[11],[13]	$ 1,082	[4],[27],[33]
Investment, Identifier [Axis]: Intermedia Holdings, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.84%	[9],[11]	10.38%	[10],[27]
Reference Rate and Spread		6%	[9],[11]	6%	[10],[27]
Principal		$ 20,414	[9],[11]	$ 20,467	[10],[27]
Cost		20,370	[9],[11]	20,418	[10],[27]
Fair value		$ 15,719	[9],[11]	$ 15,811	[10],[27]
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.32%	[3],[11],[63]	10.14%	[4],[27]
Reference Rate and Spread		6.50%	[3],[11],[63]	6.50%	[4],[27]
Principal		$ 726	[3],[11],[63]	$ 622	[4],[27]
Cost		722	[3],[11],[63]	618	[4],[27]
Fair value		$ 726	[3],[11],[63]	$ 622	[4],[27]
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.23%	[3],[11]	10.17%	[4],[27]
Reference Rate and Spread		6.50%	[3],[11]	6.50%	[4],[27]
Principal		$ 16,889	[3],[11]	$ 16,889	[4],[27]
Cost		16,794	[3],[11]	16,784	[4],[27]
Fair value		$ 16,889	[3],[11]	$ 16,889	[4],[27]
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		203,016		179,778
Cost		$ 2,756		$ 1,798
Fair value		$ 2,756		$ 1,798
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.50%		12.50%
Principal		$ 4,534		$ 4,534
Cost		4,502		4,500
Fair value		$ 4,502		$ 4,500
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.50%		12.50%
Principal		$ 3,154		$ 3,154
Cost		3,132		3,130
Fair value		$ 3,132		$ 3,130
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		13.50%		12.50%
Principal		$ 8,944		$ 8,944
Cost		8,944		8,944
Fair value		$ 8,944		$ 8,944
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		13.50%		12.50%
Principal		$ 19,712		$ 19,712
Cost		19,568		19,559
Fair value		$ 19,568		$ 19,559
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 5
Schedule of Investments [Line Items]
Total Rate		13.50%
Principal		$ 11,200
Cost		10,836
Fair value		$ 10,836
Investment, Identifier [Axis]: Isagenix International, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		9.93%	[9],[11],[13]	9.93%	[10],[27],[33]
Reference Rate and Spread		7.75%	[9],[11],[13]	7.75%	[10],[27],[33]
Principal		$ 5,053	[9],[11],[13]	$ 5,053	[10],[27],[33]
Cost		5,036	[9],[11],[13]	5,038	[10],[27],[33]
Fair value		$ 1,718	[9],[11],[13]	$ 1,537	[10],[27],[33]
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Common Equity
Schedule of Investments [Line Items]
Units (in shares)		1,684,211	[3]	1,684,211	[4]
Cost		$ 1,684	[3]	$ 1,684	[4]
Fair value		$ 2,840	[3]	$ 2,840	[4]
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6%	[3],[11],[32]	6%	[4],[27],[28]
Principal		$ 0	[3],[11],[32]	$ 0	[4],[27],[28]
Cost		(126)	[3],[11],[32]	(135)	[4],[27],[28]
Fair value		$ (126)	[3],[11],[32]	$ (135)	[4],[27],[28]
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.73%	[3],[11]	10.73%	[4],[27]
Reference Rate and Spread		6%	[3],[11]	6%	[4],[27]
Principal		$ 36,711	[3],[11]	$ 36,947	[4],[27]
Cost		36,159	[3],[11]	36,358	[4],[27]
Fair value		$ 36,711	[3],[11]	$ 36,947	[4],[27]
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		2,826,667	[3],[30]	2,826,667	[4],[31]
Total Rate	[4],[31]			12%
PIK Rate	[4],[31]			12%
Cost		$ 110	[3],[30]	$ 123	[4],[31]
Fair value		$ 500	[3],[30]	$ 623	[4],[31]
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.23%	[3],[11]	12.23%	[4],[27]
Reference Rate and Spread		7.50%	[3],[11]	7.50%	[4],[27]
Principal		$ 488	[3],[11]	$ 500	[4],[27]
Cost		473	[3],[11]	483	[4],[27]
Fair value		$ 487	[3],[11]	$ 500	[4],[27]
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.23%	[3],[11]	12.23%	[4],[27]
Reference Rate and Spread		7.50%	[3],[11]	7.50%	[4],[27]
Principal		$ 2,027	[3],[11]	$ 2,079	[4],[27]
Cost		2,027	[3],[11]	2,079	[4],[27]
Fair value		$ 2,027	[3],[11]	$ 2,079	[4],[27]
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		627	[30]	627	[27]
Cost		$ 811	[30]	$ 811	[27]
Fair value		$ 14,850	[30]	$ 14,970	[27]
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6.75%	[32]	6.75%	[28]
Principal		$ 0	[32]	$ 0	[28]
Cost		0	[32]	0	[28]
Fair value		$ 0	[32]	$ 0	[28]
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.50%	[11]	13.75%	[27]
Reference Rate and Spread		6.75%	[11]	6.75%	[27]
Principal		$ 2,450	[11]	$ 2,450	[27]
Cost		2,446	[11]	2,444	[27]
Fair value		$ 2,450	[11]	$ 2,450	[27]
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		472,579	[9]	472,579	[10]
Cost		$ 4,429	[9]	$ 4,429	[10]
Fair value		$ 0	[9]	$ 0	[10]
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		23.04%	[9],[14]	18%	[10]
Reference Rate and Spread	[9],[14]	18%
PIK Rate	[9],[14]	23.04%
Principal		$ 2,431	[9],[14]	$ 2,297	[10]
Cost		2,431	[9],[14]	2,297	[10]
Fair value		$ 2,431	[9],[14]	$ 2,297	[10]
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		21.08%	[9],[13],[14]	19.75%	[10],[33]
Reference Rate and Spread	[9],[13],[14]	16%
PIK Rate		21.08%	[9],[13],[14]	19.75%	[10],[33]
Principal		$ 4,034	[9],[13],[14]	$ 4,034	[10],[33]
Cost		3,997	[9],[13],[14]	3,997	[10],[33]
Fair value		$ 280	[9],[13],[14]	$ 504	[10],[33]
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		3,150	[30]	3,150	[31]
Cost		$ 3,150	[30]	$ 3,150	[31]
Fair value		$ 6,550	[30]	$ 5,540	[31]
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		11.50%	[11],[32]	11.50%	[27],[28]
Principal		$ 0	[11],[32]	$ 0	[27],[28]
Cost		(13)	[11],[32]	(14)	[27],[28]
Fair value		$ 0	[11],[32]	$ 0	[27],[28]
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		16.25%	[11]	15.63%	[27]
Reference Rate and Spread		11.50%	[11]	11.50%	[27]
Principal		$ 9,999	[11]	$ 9,999	[27]
Cost		9,925	[11]	9,920	[27]
Fair value		$ 9,999	[11]	$ 9,999	[27]
Investment, Identifier [Axis]: JorVet Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		107,406	[30]	107,406	[31]
Cost		$ 10,741	[30]	$ 10,741	[31]
Fair value		$ 10,741	[30]	$ 10,741	[31]
Investment, Identifier [Axis]: JorVet Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal		$ 25,650		$ 25,650
Cost		25,445		25,432
Fair value		$ 25,445		$ 25,432
Investment, Identifier [Axis]: KBK Industries, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		325	[30]	325	[31]
Cost		$ 783	[30]	$ 783	[31]
Fair value		$ 11,980	[30]	$ 15,570	[31]
Investment, Identifier [Axis]: KBK Industries, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10%
Principal		$ 5,750
Cost		5,694
Fair value		$ 5,750
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%	[3],[11]	12%	[4],[27]
Reference Rate and Spread		7.25%	[3],[11]	7.25%	[4],[27]
Principal		$ 1,053	[3],[11]	$ 1,064	[4],[27]
Cost		1,011	[3],[11]	1,019	[4],[27]
Fair value		$ 988	[3],[11]	$ 995	[4],[27]
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%	[3],[11]	12%	[4],[27]
Reference Rate and Spread		7.25%	[3],[11]	7.25%	[4],[27]
Principal		$ 7,486	[3],[11]	$ 7,505	[4],[27]
Cost		7,379	[3],[11]	7,391	[4],[27]
Fair value		$ 7,011	[3],[11]	$ 7,022	[4],[27]
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		800	[30],[41]	800	[31],[42]
Cost		$ 992	[30],[41]	$ 992	[31],[42]
Fair value		$ 2,780	[30],[41]	$ 2,850	[31],[42]
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		581		581
Cost		$ 12,240		$ 12,240
Fair value		$ 7,220		$ 7,220
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%		11.50%
Principal		$ 20,599		$ 20,415
Cost		20,566		20,374
Fair value		$ 20,566		$ 20,374
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		9%		9%
Principal		$ 3,869		$ 3,879
Cost		3,833		3,842
Fair value		$ 3,833		$ 3,842
Investment, Identifier [Axis]: Kore Wireless Group Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.08%	[9],[14]	10.08%	[10],[26]
Reference Rate and Spread		5.50%	[9],[14]	5.50%	[10],[26]
Principal		$ 11,297	[9],[14]	$ 11,326	[10],[26]
Cost		11,258	[9],[14]	11,280	[10],[26]
Fair value		$ 10,732	[9],[14]	$ 10,930	[10],[26]
Investment, Identifier [Axis]: LKCM Headwater Investments I, L.P., LP Interests
Schedule of Investments [Line Items]
Units (percentage)		2.27%	[5],[6],[30],[45]	2.27%	[7],[8],[31],[46]
Cost		$ 1,746	[5],[6],[30],[45]	$ 1,746	[7],[8],[31],[46]
Fair value		$ 3,284	[5],[6],[30],[45]	$ 3,197	[7],[8],[31],[46]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.11%	[3],[11],[14]	11.21%	[4],[26],[27]
Reference Rate and Spread		7.25%	[3],[11],[14]	7.25%	[4],[26],[27]
Principal		$ 8,065	[3],[11],[14]	$ 8,106	[4],[26],[27]
Cost		8,053	[3],[11],[14]	8,087	[4],[26],[27]
Fair value		$ 7,969	[3],[11],[14]	$ 8,047	[4],[26],[27]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.13%	[3],[11],[14],[64]	11.67%	[4],[26],[27]
Reference Rate and Spread		7.25%	[3],[11],[14],[64]	7.25%	[4],[26],[27]
Principal		$ 9,197	[3],[11],[14],[64]	$ 9,197	[4],[26],[27]
Cost		9,172	[3],[11],[14],[64]	9,160	[4],[26],[27]
Fair value		$ 9,087	[3],[11],[14],[64]	$ 9,130	[4],[26],[27]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.09%	[3],[11],[14]	11.67%	[4],[26],[27]
Reference Rate and Spread		7.25%	[3],[11],[14]	7.25%	[4],[26],[27]
Principal		$ 10,812	[3],[11],[14]	$ 10,827	[4],[26],[27]
Cost		10,749	[3],[11],[14]	10,733	[4],[26],[27]
Fair value		$ 10,683	[3],[11],[14]	$ 10,749	[4],[26],[27]
Investment, Identifier [Axis]: LLFlex, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.75%	[3],[11]	12.74%	[4],[27]
Reference Rate and Spread		9%	[3],[11]	9%	[4],[27]
Principal		$ 4,433	[3],[11]	$ 4,444	[4],[27]
Cost		4,364	[3],[11]	4,370	[4],[27]
Fair value		$ 4,081	[3],[11]	$ 4,350	[4],[27]
Investment, Identifier [Axis]: Lightbox Holdings, L.P., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.16%	[9]	9.73%	[10]
Reference Rate and Spread		5%	[9]	5%	[10]
Principal		$ 14,438	[9]	$ 14,475	[10]
Cost		14,321	[9]	14,349	[10]
Fair value		$ 13,932	[9]	$ 13,968	[10]
Investment, Identifier [Axis]: Logix Acquisition Company, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.59%	[3],[11]	10.13%	[4],[27]
Reference Rate and Spread		5.75%	[3],[11]	5.75%	[4],[27]
Principal		$ 19,662	[3],[11]	$ 19,662	[4],[27]
Cost		19,111	[3],[11]	19,033	[4],[27]
Fair value		$ 16,098	[3],[11]	$ 16,221	[4],[27]
Investment, Identifier [Axis]: Looking Glass Investments, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		3	[5],[6]	3	[7],[8]
Cost		$ 125	[5],[6]	$ 125	[7],[8]
Fair value		$ 25	[5],[6]	$ 25	[7],[8]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.72%	[9],[11],[14],[29]	10.42%	[10],[26],[27]
Reference Rate and Spread		6%	[9],[11],[14],[29]	6%	[10],[26],[27]
Principal		$ 9,259	[9],[11],[14],[29]	$ 8,338	[10],[26],[27]
Cost		9,184	[9],[11],[14],[29]	8,267	[10],[26],[27]
Fair value		$ 9,259	[9],[11],[14],[29]	$ 8,338	[10],[26],[27]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.72%	[9],[11],[14]	10.42%	[10],[26],[27]
Reference Rate and Spread		6%	[9],[11],[14]	6%	[10],[26],[27]
Principal		$ 7,856	[9],[11],[14]	$ 7,876	[10],[26],[27]
Cost		7,770	[9],[11],[14]	7,784	[10],[26],[27]
Fair value		$ 7,856	[9],[11],[14]	$ 7,876	[10],[26],[27]
Investment, Identifier [Axis]: MH Corbin Holding LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		66,000		66,000
Cost		$ 4,400		$ 4,400
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: MH Corbin Holding LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		4,000		4,000
Cost		$ 6,000		$ 6,000
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: MH Corbin Holding LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13%	[12]	13%
Principal		$ 6,040	[12]	$ 6,156
Cost		6,040	[12]	6,156
Fair value		$ 5,384	[12]	$ 4,548
Investment, Identifier [Axis]: MS Private Loan Fund I, LP, LP Interests
Schedule of Investments [Line Items]
Units (percentage)		14.51%	[5],[6],[30],[45]	14.51%	[7],[8],[31],[46]
Cost		$ 14,250	[5],[6],[30],[45]	$ 14,250	[7],[8],[31],[46]
Fair value		14,775	[5],[6],[30],[45]	14,833	[7],[8],[31],[46]
Investment, Identifier [Axis]: MS Private Loan Fund I, LP, Secured Debt
Schedule of Investments [Line Items]
Principal		0	[5],[6],[32]	0	[7],[8],[28]
Cost		0	[5],[6],[32]	0	[7],[8],[28]
Fair value		$ 0	[5],[6],[32]	$ 0	[7],[8],[28]
Investment, Identifier [Axis]: MSC Adviser I, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		1	[30],[65]	1	[31],[66]
Cost		$ 29,500	[30],[65]	$ 29,500	[31],[66]
Fair value		$ 132,650	[30],[65]	$ 122,930	[31],[66]
Investment, Identifier [Axis]: MSC Income Fund, Inc., Common Equity
Schedule of Investments [Line Items]
Units (in shares)		94,697	[5],[6],[30]	94,697	[7],[8],[31]
Cost		$ 750	[5],[6],[30]	$ 750	[7],[8],[31]
Fair value		$ 760	[5],[6],[30]	$ 753	[7],[8],[31]
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.30%	[3],[11]	11.79%	[4],[27],[67]
Reference Rate and Spread		7.25%	[3],[11]	7.25%	[4],[27],[67]
Principal		$ 1,825	[3],[11]	$ 3,103	[4],[27],[67]
Cost		1,788	[3],[11]	3,063	[4],[27],[67]
Fair value		$ 1,808	[3],[11]	$ 3,083	[4],[27],[67]
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.30%	[3],[11]	11.09%	[4],[27]
Reference Rate and Spread		7.25%	[3],[11]	7.25%	[4],[27]
Principal		$ 15,245	[3],[11]	$ 15,324	[4],[27]
Cost		15,061	[3],[11]	15,122	[4],[27]
Fair value		$ 15,102	[3],[11]	$ 15,224	[4],[27]
Investment, Identifier [Axis]: Market Force Information, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		743,921		743,921
Cost		$ 16,642		$ 16,642
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.75%	[11]	15.13%	[27]
Reference Rate and Spread		11%	[11]	11%	[27]
Principal		$ 6,900	[11]	$ 6,275	[27]
Cost		6,888	[11]	6,253	[27]
Fair value		$ 0	[11]	$ 6,090	[27]
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%	[13]	12%	[33]
PIK Rate		12%	[13]	12%	[33]
Principal		$ 26,079	[13]	$ 26,079	[33]
Cost		25,952	[13]	25,952	[33]
Fair value		$ 0	[13]	$ 1,610	[33]
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		1,537,219	[30]	1,537,219
Cost		$ 1,537	[30]	$ 1,537
Fair value		$ 1,537	[30]	$ 1,537
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		5,915,585	[30]	5,915,585	[31]
Total Rate		8%	[30]	8%	[31]
Reference Rate and Spread	[30]	8%
PIK Rate		8%		8%	[31]
Cost		$ 6,127	[30]	$ 6,010	[31]
Fair value		6,127	[30]	6,010	[31]
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[32]	0	[28]
Cost		0	[32]	0	[28]
Fair value		$ 0	[32]	$ 0	[28]
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.75%		12.75%
Principal		$ 23,802		$ 23,802
Cost		23,588		23,576
Fair value		$ 23,588		$ 23,576
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6.25%	[3],[11],[14],[32]	6.25%	[4],[26],[27],[28]
Principal		$ 0	[3],[11],[14],[32]	$ 0	[4],[26],[27],[28]
Cost		(60)	[3],[11],[14],[32]	(63)	[4],[26],[27],[28]
Fair value		$ (60)	[3],[11],[14],[32]	$ (63)	[4],[26],[27],[28]
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.09%	[3],[11],[14]	9.86%	[4],[26],[27]
Reference Rate and Spread		6.25%	[3],[11],[14]	6.25%	[4],[26],[27]
Principal		$ 25,722	[3],[11],[14]	$ 26,075	[4],[26],[27]
Cost		25,294	[3],[11],[14]	25,619	[4],[26],[27]
Fair value		$ 24,856	[3],[11],[14]	$ 25,181	[4],[26],[27]
Investment, Identifier [Axis]: Mills Fleet Farm Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.08%	[3],[11]	10.66%	[4],[27]
Reference Rate and Spread		6.25%	[3],[11]	6.25%	[4],[27]
Principal		$ 18,769	[3],[11]	$ 18,769	[4],[27]
Cost		18,590	[3],[11]	18,562	[4],[27]
Fair value		$ 18,366	[3],[11]	$ 18,338	[4],[27]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		44,445,814	[3],[6],[15]	44,445,814	[4],[8],[16]
Cost		$ 889	[3],[6],[15]	$ 889	[4],[8],[16]
Fair value		$ 889	[3],[6],[15]	$ 889	[4],[8],[16]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[3],[6],[11],[15]	12.11%
Reference Rate and Spread		7%	[3],[6],[11],[15]	7%	[4],[8],[16],[27],[28]
Principal		$ 1,930	[3],[6],[11],[15]	$ 0	[4],[8],[16],[27],[28]
Cost		1,869	[3],[6],[11],[15]	(64)	[4],[8],[16],[27],[28]
Fair value		$ 1,869	[3],[6],[11],[15]	$ (64)	[4],[8],[16],[27],[28]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.73%	[3],[6],[11],[15]	11.73%	[4],[8],[16],[27]
Reference Rate and Spread		7%	[3],[6],[11],[15]	7%	[4],[8],[16],[27]
Principal		$ 10,107	[3],[6],[11],[15]	$ 10,107	[4],[8],[16],[27]
Cost		9,933	[3],[6],[11],[15]	9,923	[4],[8],[16],[27]
Fair value		$ 10,892	[3],[6],[11],[15]	$ 10,714	[4],[8],[16],[27]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.73%	[3],[6],[11],[15]	11.73%	[4],[8],[16],[27]
Reference Rate and Spread		7%	[3],[6],[11],[15]	7%	[4],[8],[16],[27]
Principal		$ 17,038	[3],[6],[11],[15]	$ 17,038	[4],[8],[16],[27]
Cost		16,763	[3],[6],[11],[15]	16,746	[4],[8],[16],[27]
Fair value		$ 17,038	[3],[6],[11],[15]	$ 17,038	[4],[8],[16],[27]
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		5,873	[30]	5,873	[31]
Cost		$ 2,720	[30]	$ 2,720	[31]
Fair value		25,010	[30]	22,830	[31]
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[32]	0	[28]
Cost		0	[32]	0	[28]
Fair value		$ 0	[32]	$ 0	[28]
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10%		10%
Principal		$ 5,746		$ 5,746
Cost		5,746		5,746
Fair value		$ 5,746		$ 5,746
Investment, Identifier [Axis]: NAPCO Precast, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		2,955		2,955
Cost		$ 2,975		$ 2,975
Fair value		$ 12,500		$ 11,830
Investment, Identifier [Axis]: NBG Acquisition Inc, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.71%	[9],[11],[13]	9.67%	[10],[27]
Reference Rate and Spread		5.50%	[9],[11],[13]	5.50%	[10],[27]
Principal		$ 3,849	[9],[11],[13]	$ 3,849	[10],[27]
Cost		3,837	[9],[11],[13]	3,834	[10],[27]
Fair value		$ 115	[9],[11],[13]	$ 1,251	[10],[27]
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)	[31]			65,962
Cost	[31]			$ 3,717
Fair value	[31]			$ 4,790
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units 1
Schedule of Investments [Line Items]
Units (in shares)	[30]	65,962
Cost	[30]	$ 114
Fair value	[30]	$ 187
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units 2
Schedule of Investments [Line Items]
Units (in shares)	[30]	65,962
Cost	[30]	$ 3,603
Fair value	[30]	$ 4,893
Investment, Identifier [Axis]: NRP Jones, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal		$ 2,080		$ 2,080
Cost		2,080		2,080
Fair value		$ 2,080		$ 2,080
Investment, Identifier [Axis]: NTM Acquisition Corp., Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.30%	[9],[11],[14]	9.50%	[10],[27]
Reference Rate and Spread		7.25%	[9],[11],[14]	6.25%	[10],[27]
PIK Rate		1%	[9],[11],[14]	1%	[10],[27]
Principal		$ 4,298	[9],[11],[14]	$ 4,358	[10],[27]
Cost		4,298	[9],[11],[14]	4,358	[10],[27]
Fair value		$ 4,126	[9],[11],[14]	$ 4,228	[10],[27]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.85%	[3],[11],[14],[68]	10.85%	[4],[26],[27],[69]
Reference Rate and Spread		8%	[3],[11],[14],[68]	8%	[4],[26],[27],[69]
Principal		$ 4,963	[3],[11],[14],[68]	$ 3,941	[4],[26],[27],[69]
Cost		4,829	[3],[11],[14],[68]	3,797	[4],[26],[27],[69]
Fair value		$ 4,662	[3],[11],[14],[68]	$ 3,720	[4],[26],[27],[69]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.87%	[3],[11],[14]	12.56%	[4],[26],[27]
Reference Rate and Spread		8%	[3],[11],[14]	8%	[4],[26],[27]
Principal		$ 39,642	[3],[11],[14]	$ 39,851	[4],[26],[27]
Cost		38,945	[3],[11],[14]	39,094	[4],[26],[27]
Fair value		$ 37,237	[3],[11],[14]	$ 37,616	[4],[26],[27]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		20%	[3]	20%	[4]
PIK Rate		20%	[3]	20%	[4]
Principal		$ 6,838	[3]	$ 6,509	[4]
Cost		6,545	[3]	6,194	[4]
Fair value		$ 6,472	[3]	$ 6,194	[4]
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC (NVS), Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		7%
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC (NVS), Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC (NVS), Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12%
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		6,987	[30]	6,987
Cost		$ 6,987	[30]	$ 6,987
Fair value		$ 11,220	[30]	$ 7,700
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%
Reference Rate and Spread	[27],[28]			7%
Principal		$ 20,094		$ 0	[27],[28]
Cost		19,982		0	[27],[28]
Fair value		$ 20,094		$ 0	[27],[28]
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal		$ 10,500		$ 20,094
Cost		10,440		19,972
Fair value		$ 10,500		$ 20,094
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate				12%
Principal				$ 10,500
Cost				10,434
Fair value				$ 10,500
Investment, Identifier [Axis]: NexRev LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		103,144,186	[30]	103,144,186	[31]
Cost		$ 8,213	[30]	$ 8,213	[31]
Fair value		2,990	[30]	1,110	[31]
Investment, Identifier [Axis]: NexRev LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[32]	0	[28]
Cost		0	[32]	0	[28]
Fair value		$ 0	[32]	$ 0	[28]
Investment, Identifier [Axis]: NexRev LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11%		11%
Principal		$ 10,836		$ 11,465
Cost		10,727		11,335
Fair value		$ 8,870		$ 8,477
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6.25%	[3],[11],[32]	6.25%	[4],[27],[28]
Principal		$ 0	[3],[11],[32]	$ 0	[4],[27],[28]
Cost		(1)	[3],[11],[32]	(1)	[4],[27],[28]
Fair value		$ 0	[3],[11],[32]	$ 0	[4],[27],[28]
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Reference Rate and Spread		6.25%	[3],[11],[32]	6.25%	[4],[27],[28]
Principal		$ 0	[3],[11],[32]	$ 0	[4],[27],[28]
Cost		(33)	[3],[11],[32]	(38)	[4],[27],[28]
Fair value		$ (33)	[3],[11],[32]	$ (38)	[4],[27],[28]
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11%	[3],[11]	9.99%	[4],[27]
Reference Rate and Spread		6.25%	[3],[11]	6.25%	[4],[27]
Principal		$ 21,666	[3],[11]	$ 21,666	[4],[27]
Cost		21,449	[3],[11]	21,418	[4],[27]
Fair value		$ 21,666	[3],[11]	$ 21,666	[4],[27]
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		406		406
Cost		$ 10,200		$ 10,200
Fair value		$ 7,630		$ 8,040
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		2,062		2,062
Cost		$ 2,062		$ 2,062
Fair value		$ 5,150		$ 5,150
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.25%	[11]	10.63%	[27]
Reference Rate and Spread		6.50%	[11]	6.50%	[27]
Principal		$ 4,400	[11]	$ 4,400	[27]
Cost		4,399	[11]	4,399	[27]
Fair value		$ 4,399	[11]	$ 4,399	[27]
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal		$ 18,440		$ 18,440
Cost		18,417		18,414
Fair value		$ 18,417		$ 18,414
Investment, Identifier [Axis]: OMi Topco, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		900	[30]	900	[31]
Cost		$ 1,080	[30]	$ 1,080	[31]
Fair value		$ 25,100	[30]	$ 22,810	[31]
Investment, Identifier [Axis]: OMi Topco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal		$ 15,000		$ 15,750
Cost		14,897		15,634
Fair value		$ 15,000		$ 15,750
Investment, Identifier [Axis]: OVG Business Services, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.89%	[3],[11]	10.64%	[4],[27]
Reference Rate and Spread		6.25%	[3],[11]	6.25%	[4],[27]
Principal		$ 13,860	[3],[11]	$ 13,930	[4],[27]
Cost		13,748	[3],[11]	13,813	[4],[27]
Fair value		$ 13,514	[3],[11]	$ 13,094	[4],[27]
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Common Stock
Schedule of Investments [Line Items]
Units (in shares)		635		635
Cost		$ 830		$ 830
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Preferred Stock
Schedule of Investments [Line Items]
Units (in shares)		912		912
Total Rate		7%		7%
PIK Rate		7%		7%
Cost		$ 1,981		$ 1,981
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%	[13]	12%	[33]
PIK Rate		12%	[13]	12%	[33]
Principal		$ 964	[13]	$ 964	[33]
Cost		964	[13]	964	[33]
Fair value		$ 563	[13]	$ 569	[33]
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%	[13]	12%	[33]
PIK Rate		12%	[13]	12%	[33]
Principal		$ 983	[13]	$ 983	[33]
Cost		983	[13]	983	[33]
Fair value		$ 574	[13]	$ 580	[33]
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12%	[13]	12%	[33]
PIK Rate		12%	[13]	12%	[33]
Principal		$ 2,116	[13]	$ 2,116	[33]
Cost		2,116	[13]	2,116	[33]
Fair value		$ 1,236	[13]	$ 1,249	[33]
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		12%	[13]	12%	[33]
PIK Rate		12%	[13]	12%	[33]
Principal		$ 4,415	[13]	$ 4,415	[33]
Cost		4,415	[13]	4,415	[33]
Fair value		$ 2,577	[13]	$ 2,606	[33]
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Unsecured Debt
Schedule of Investments [Line Items]
Total Rate		10%	[13]	10%	[33]
PIK Rate		10%	[13]	10%	[33]
Principal		$ 305	[13]	$ 305	[33]
Cost		305	[13]	305	[33]
Fair value		$ 305	[13]	$ 305	[33]
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Warrants
Schedule of Investments [Line Items]
Units (in shares)		4,699	[24]	4,699	[25]
Cost		$ 1,089	[24]	$ 1,089	[25]
Fair value		$ 0	[24]	$ 0	[25]
Investment, Identifier [Axis]: Oneliance, LLC, Preferred Stock
Schedule of Investments [Line Items]
Units (in shares)		1,056		1,056
Cost		$ 1,056		$ 1,056
Fair value		$ 1,056		$ 1,056
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		11%		11%	[27],[28]
PIK Rate	[11],[32]	11%
Principal		$ 0	[11],[32]	$ 0	[27],[28]
Cost		0	[11],[32]	0	[27],[28]
Fair value		$ 0	[11],[32]	$ 0	[27],[28]
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.75%	[11]	15.13%	[27]
Reference Rate and Spread		11%		11%	[27]
PIK Rate	[11]	11%
Principal		$ 5,520	[11]	$ 5,600	[27]
Cost		5,482	[11]	5,559	[27]
Fair value		$ 5,482	[11]	$ 5,559	[27]
Investment, Identifier [Axis]: Orttech Holdings, LLC, Preferred Stock
Schedule of Investments [Line Items]
Units (in shares)		10,000	[30],[41]	10,000	[31],[42]
Cost		$ 10,000	[30],[41]	$ 10,000	[31],[42]
Fair value		$ 13,500	[30],[41]	$ 11,750	[31],[42]
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		11%	[11],[32]	11%	[27],[28]
Principal		$ 0	[11],[32]	$ 0	[27],[28]
Cost		0	[11],[32]	0	[27],[28]
Fair value		$ 0	[11],[32]	$ 0	[27],[28]
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.75%	[11]	15.13%	[27]
Reference Rate and Spread		11%	[11]	11%	[27]
Principal		$ 22,800	[11]	$ 23,600	[27]
Cost		22,646	[11]	23,429	[27]
Fair value		$ 22,646	[11]	$ 23,429	[27]
Investment, Identifier [Axis]: Ospemifene Royalty Sub LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.50%	[3],[13]	11.50%	[4],[33]
Principal		$ 4,474	[3],[13]	$ 4,489	[4],[33]
Cost		4,474	[3],[13]	4,489	[4],[33]
Fair value		$ 88	[3],[13]	$ 103	[4],[33]
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock 1
Schedule of Investments [Line Items]
Units (in shares)		2,000	[30]	2,000	[31]
Cost		$ 2,150	[30]	$ 2,150	[31]
Fair value		$ 18,950	[30]	$ 18,950	[31]
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock 2
Schedule of Investments [Line Items]
Units (in shares)		238,421		238,421
Cost		$ 238		$ 238
Fair value		$ 170		$ 238
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		7%	[11],[32]	7%	[27],[28]
Principal		$ 0	[11],[32]	$ 0	[27],[28]
Cost		(8)	[11],[32]	(9)	[27],[28]
Fair value		$ 0	[11],[32]	$ 0	[27],[28]
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.38%	[11]	10.25%	[27]
Reference Rate and Spread		7%	[11]	7%	[27]
Principal		$ 21,655	[11]	$ 21,655	[27]
Cost		21,420	[11]	21,408	[27]
Fair value		$ 21,655	[11]	$ 21,655	[27]
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[6],[11]	14.25%
Reference Rate and Spread		6.25%	[6],[11]	7.25%	[4],[8],[26],[27],[28]
Principal		$ 1,431	[6],[11]	$ 0	[4],[8],[26],[27],[28]
Cost		1,266	[6],[11]	(174)	[4],[8],[26],[27],[28]
Fair value		$ 1,392	[6],[11]	$ (174)	[4],[8],[26],[27],[28]
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.32%	[6],[11],[14]	11.80%	[4],[8],[26],[27]
Reference Rate and Spread		7.25%	[6],[11],[14]	7.25%	[4],[8],[26],[27]
Principal		$ 28,109	[6],[11],[14]	$ 28,265	[4],[8],[26],[27]
Cost		27,620	[6],[11],[14]	27,749	[4],[8],[26],[27]
Fair value		$ 27,344	[6],[11],[14]	$ 27,911	[4],[8],[26],[27]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.70%	[3],[11],[14]	10.26%	[4],[26],[27]
Reference Rate and Spread		5.75%	[3],[11],[14]	5.75%	[4],[26],[27]
Principal		$ 1,082	[3],[11],[14]	$ 541	[4],[26],[27]
Cost		984	[3],[11],[14]	437	[4],[26],[27]
Fair value		$ 1,055	[3],[11],[14]	$ 530	[4],[26],[27]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.78%	[3],[11],[14]	9.96%	[4],[26],[27],[70]
Reference Rate and Spread		5.75%	[3],[11],[14]	5.75%	[4],[26],[27],[70]
Principal		$ 3,237	[3],[11],[14]	$ 2,701	[4],[26],[27],[70]
Cost		3,150	[3],[11],[14]	2,609	[4],[26],[27],[70]
Fair value		$ 3,158	[3],[11],[14]	$ 2,649	[4],[26],[27],[70]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.48%	[3],[11],[14]	9.81%	[4],[26],[27]
Reference Rate and Spread		5.75%	[3],[11],[14]	5.75%	[4],[26],[27]
Principal		$ 18,739	[3],[11],[14]	$ 18,293	[4],[26],[27]
Cost		18,326	[3],[11],[14]	17,852	[4],[26],[27]
Fair value		$ 18,281	[3],[11],[14]	$ 17,939	[4],[26],[27]
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		13,800	[30]	13,800	[31]
Cost		$ 13,000	[30]	$ 13,000	[31]
Fair value		$ 43,540	[30]	43,260	[31]
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%
Principal		$ 3,500		0	[28]
Cost		3,495		0	[28]
Fair value		$ 3,500		0	[28]
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%
Principal		$ 11,500		0	[28]
Cost		11,462		0	[28]
Fair value		$ 11,500		$ 0	[28]
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal		$ 27,681		$ 28,681
Cost		27,557		28,537
Fair value		$ 27,681		$ 28,681
Investment, Identifier [Axis]: Principle Environmental, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		1,037		1,037
Cost		$ 1,200		$ 1,200
Fair value		$ 500		$ 590
Investment, Identifier [Axis]: Principle Environmental, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		21,806	[30]	21,806	[31]
Cost		$ 5,709	[30]	$ 5,709	[31]
Fair value		$ 10,480	[30]	12,420	[31]
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13%
Principal		$ 5,897
Cost		5,812
Fair value		$ 5,812
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal	[28]			0
Cost	[28]			0
Fair value	[28]			$ 0
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%		13%
Principal				$ 5,897
Cost				5,806
Fair value				$ 5,806
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6.25%	[3],[11],[32]	6.25%	[4],[27],[28]
Principal		$ 0	[3],[11],[32]	$ 0	[4],[27],[28]
Cost		(17)	[3],[11],[32]	(18)	[4],[27],[28]
Fair value		$ (17)	[3],[11],[32]	$ (18)	[4],[27],[28]
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.89%	[3],[11]	10.64%	[4],[27]
Reference Rate and Spread		6.25%	[3],[11]	6.25%	[4],[27]
Principal		$ 29,363	[3],[11]	$ 29,475	[4],[27]
Cost		28,960	[3],[11]	29,040	[4],[27]
Fair value		$ 28,998	[3],[11]	$ 29,419	[4],[27]
Investment, Identifier [Axis]: Quality Lease Service, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		1,000		1,000
Cost		$ 7,513		$ 7,513
Fair value		$ 525		$ 525
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[3],[11],[14]	11.47%
Reference Rate and Spread		6.75%	[3],[11],[14]	6.75%	[4],[26],[27],[28]
Principal		$ 383	[3],[11],[14]	$ 0	[4],[26],[27],[28]
Cost		373	[3],[11],[14]	(11)	[4],[26],[27],[28]
Fair value		$ 346	[3],[11],[14]	$ (11)	[4],[26],[27],[28]
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.63%	[3],[11],[14]	10.56%	[4],[26],[27]
Reference Rate and Spread		6.75%	[3],[11],[14]	6.75%	[4],[26],[27]
Principal		$ 13,369	[3],[11],[14]	$ 13,369	[4],[26],[27]
Cost		13,251	[3],[11],[14]	13,241	[4],[26],[27]
Fair value		$ 12,052	[3],[11],[14]	$ 12,094	[4],[26],[27]
Investment, Identifier [Axis]: RM Bidder, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		2,779	[3]	2,779	[4]
Cost		$ 46	[3]	$ 46	[4]
Fair value		$ 20	[3]	$ 19	[4]
Investment, Identifier [Axis]: RM Bidder, LLC, Warrants
Schedule of Investments [Line Items]
Units (in shares)		327,532	[3],[71]	327,532	[4],[72]
Cost		$ 425	[3],[71]	$ 425	[4],[72]
Fair value		$ 0	[3],[71]	$ 0	[4],[72]
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.52%	[3],[11],[14]	12.02%	[4],[26],[27],[73]
Reference Rate and Spread		7.75%	[3],[11],[14]	7.75%	[4],[26],[27],[73]
Principal		$ 2,055	[3],[11],[14]	$ 1,361	[4],[26],[27],[73]
Cost		2,038	[3],[11],[14]	1,343	[4],[26],[27],[73]
Fair value		$ 1,882	[3],[11],[14]	$ 1,258	[4],[26],[27],[73]
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.52%	[3],[11],[14]	11.49%	[4],[26],[27]
Reference Rate and Spread		7.75%	[3],[11],[14]	7.75%	[4],[26],[27]
Principal		$ 15,364	[3],[11],[14]	$ 16,623	[4],[26],[27]
Cost		15,266	[3],[11],[14]	16,506	[4],[26],[27]
Fair value		$ 14,069	[3],[11],[14]	$ 15,367	[4],[26],[27]
Investment, Identifier [Axis]: Research Now Group, Inc. and Survey Sampling International, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.31%	[9],[11]	8.84%	[10],[27]
Reference Rate and Spread		5.50%	[9],[11]	5.50%	[10],[27]
Principal		$ 19,914	[9],[11]	$ 19,966	[10],[27]
Cost		19,721	[9],[11]	19,745	[10],[27]
Fair value		$ 15,273	[9],[11]	$ 15,116	[10],[27]
Investment, Identifier [Axis]: River Aggregates, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		1,500	[41]	1,500	[42]
Cost		$ 369	[41]	$ 369	[42]
Fair value		$ 3,620	[41]	$ 3,620	[42]
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		11,070		11,070
Cost		$ 11,070		$ 11,070
Fair value		9,930		14,880
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[32]	0	[27],[28]
Cost		(33)	[32]	(35)	[27],[28]
Fair value		$ (33)	[32]	$ (35)	[27],[28]
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%		12.50%	[27]
Principal		$ 35,460		$ 35,685	[27]
Cost		35,198		35,404	[27]
Fair value		$ 35,198		$ 35,404	[27]
Investment, Identifier [Axis]: Rocaceia, LLC (Quality Lease and Rental Holdings, LLC), Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		250		250
Cost		$ 2,500		$ 2,500
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: Rocaceia, LLC (Quality Lease and Rental Holdings, LLC), Secured Debt
Schedule of Investments [Line Items]
Total Rate	[33],[40],[74]			12%
Principal	[33],[40],[74]			$ 30,369
Cost	[33],[40],[74]			29,865
Fair value	[33],[40],[74]			$ 0
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[4],[26],[27]			10.97%
Reference Rate and Spread		6.50%	[3],[11],[14],[32]	6.50%	[4],[26],[27]
Principal		$ 0	[3],[11],[14],[32]	$ 311	[4],[26],[27]
Cost		(10)	[3],[11],[14],[32]	300	[4],[26],[27]
Fair value		$ 0	[3],[11],[14],[32]	$ 311	[4],[26],[27]
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.35%	[3],[11],[14]	10.32%	[4],[26],[27]
Reference Rate and Spread		6.50%	[3],[11],[14]	6.50%	[4],[26],[27]
Principal		$ 2,333	[3],[11],[14]	$ 2,333	[4],[26],[27]
Cost		2,294	[3],[11],[14]	2,291	[4],[26],[27]
Fair value		$ 2,300	[3],[11],[14]	$ 2,333	[4],[26],[27]
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.35%	[3],[11],[14]	10.32%	[4],[26],[27]
Reference Rate and Spread		6.50%	[3],[11],[14]	6.50%	[4],[26],[27]
Principal		$ 3,173	[3],[11],[14]	$ 3,173	[4],[26],[27]
Cost		3,128	[3],[11],[14]	3,125	[4],[26],[27]
Fair value		$ 3,128	[3],[11],[14]	$ 3,173	[4],[26],[27]
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.02%	[3],[11],[14]	13.02%	[4],[26],[27]
Reference Rate and Spread		6.25%	[3],[11],[14]	6.25%	[4],[26],[27]
PIK Rate		2%	[3],[11],[14]	2%	[4],[26],[27]
Principal		$ 5,625	[3],[11],[14]	$ 5,625	[4],[26],[27]
Cost		5,595	[3],[11],[14]	5,590	[4],[26],[27]
Fair value		$ 5,176	[3],[11],[14]	$ 5,037	[4],[26],[27]
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.02%	[3],[11],[14]	13.02%	[4],[26],[27]
Reference Rate and Spread		6.25%	[3],[11],[14]	6.25%	[4],[26],[27]
PIK Rate		2%	[3],[11],[14]	2%	[4],[26],[27]
Principal		$ 8,340	[3],[11],[14]	$ 8,340	[4],[26],[27]
Cost		8,238	[3],[11],[14]	8,223	[4],[26],[27]
Fair value		$ 7,674	[3],[11],[14]	$ 7,478	[4],[26],[27]
Investment, Identifier [Axis]: SI East, LLC (Stavig), Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		9.50%
Investment, Identifier [Axis]: SI East, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		157	[30]	157	[31]
Cost		$ 1,218	[30]	$ 1,218	[31]
Fair value		13,650	[30]	13,650	[31]
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[32]	0	[28]
Cost		0	[32]	0	[28]
Fair value		$ 0	[32]	$ 0	[28]
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		9.50%		9.50%
Principal		$ 84,536		$ 89,786
Cost		84,490		89,708
Fair value		$ 84,536		$ 89,786
Investment, Identifier [Axis]: SIB Holdings, LLC, Common Equity
Schedule of Investments [Line Items]
Units (in shares)		95,238	[3]	95,238	[4]
Cost		$ 200	[3]	$ 200	[4]
Fair value		$ 97	[3]	$ 146	[4]
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.21%	[3],[11]	11.01%	[4],[27]
Reference Rate and Spread		6.25%	[3],[11]	6.25%	[4],[27]
Principal		$ 590	[3],[11]	$ 417	[4],[27]
Cost		582	[3],[11]	408	[4],[27]
Fair value		$ 533	[3],[11]	$ 393	[4],[27]
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.21%	[3],[11]	11.01%	[4],[27]
Reference Rate and Spread		6.25%	[3],[11]	6.25%	[4],[27]
Principal		$ 1,544	[3],[11]	$ 1,553	[4],[27]
Cost		1,519	[3],[11]	1,527	[4],[27]
Fair value		$ 1,395	[3],[11]	$ 1,433	[4],[27]
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.21%	[3],[11]	11.01%	[4],[27]
Reference Rate and Spread		6.25%	[3],[11]	6.25%	[4],[27]
Principal		$ 7,732	[3],[11]	$ 7,750	[4],[27]
Cost		7,615	[3],[11]	7,626	[4],[27]
Fair value		$ 6,989	[3],[11]	$ 7,151	[4],[27]
Investment, Identifier [Axis]: SPAU Holdings, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		638,710	[3]	638,710	[4]
Cost		$ 639	[3]	$ 639	[4]
Fair value		$ 639	[3]	$ 639	[4]
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		7.50%	[3],[11],[14],[32]	7.50%	[4],[26],[27],[28]
Principal		$ 0	[3],[11],[14],[32]	$ 0	[4],[26],[27],[28]
Cost		(54)	[3],[11],[14],[32]	(57)	[4],[26],[27],[28]
Fair value		$ (54)	[3],[11],[14],[32]	$ (57)	[4],[26],[27],[28]
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.23%	[3],[11],[14]	11.06%	[4],[26],[27]
Reference Rate and Spread		7.50%	[3],[11],[14]	7.50%	[4],[26],[27]
Principal		$ 15,888	[3],[11],[14]	$ 15,928	[4],[26],[27]
Cost		15,617	[3],[11],[14]	15,641	[4],[26],[27]
Fair value		$ 15,888	[3],[11],[14]	$ 15,928	[4],[26],[27]
Investment, Identifier [Axis]: Savers, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.34%	[9],[11],[14]	10.34%	[10],[26],[27]
Reference Rate and Spread		5.50%	[9],[11],[14]	5.50%	[10],[26],[27]
Principal		$ 5,642	[9],[11],[14]	$ 11,286	[10],[26],[27]
Cost		5,576	[9],[11],[14]	11,199	[10],[26],[27]
Fair value		$ 5,416	[9],[11],[14]	$ 10,938	[10],[26],[27]
Investment, Identifier [Axis]: Slick Innovations, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		70,000	[30]	70,000	[31]
Cost		$ 456	[30]	$ 456	[31]
Fair value		$ 1,790	[30]	$ 1,530	[31]
Investment, Identifier [Axis]: Slick Innovations, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14%		14%
Principal		$ 13,600		$ 13,840
Cost		13,468		13,698
Fair value		$ 13,600		$ 13,840
Investment, Identifier [Axis]: Sonic Systems International, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		9,968	[3]	9,968	[4]
Cost		$ 1,356	[3]	$ 1,356	[4]
Fair value		$ 1,230	[3]	$ 1,280	[4]
Investment, Identifier [Axis]: Sonic Systems International, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.26%	[3],[11]	11.24%	[4],[27]
Reference Rate and Spread		7.50%	[3],[11]	7.50%	[4],[27]
Principal		$ 15,769	[3],[11]	$ 15,769	[4],[27]
Cost		15,542	[3],[11]	15,527	[4],[27]
Fair value		$ 15,769	[3],[11]	$ 15,769	[4],[27]
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Common Equity
Schedule of Investments [Line Items]
Units (in shares)		863,636	[3]	863,636	[4]
Cost		$ 864	[3]	$ 864	[4]
Fair value		$ 1,316	[3]	$ 1,316	[4]
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		5.25%	[3],[11],[32]	5.75%	[4],[27],[28]
Principal		$ 0	[3],[11],[32]	$ 0	[4],[27],[28]
Cost		(66)	[3],[11],[32]	(71)	[4],[27],[28]
Fair value		$ (66)	[3],[11],[32]	$ (71)	[4],[27],[28]
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.03%	[3],[11]	9.69%	[4],[27]
Reference Rate and Spread		5.25%	[3],[11]	5.75%	[4],[27]
Principal		$ 41,151	[3],[11]	$ 41,255	[4],[27]
Cost		40,540	[3],[11]	40,603	[4],[27]
Fair value		$ 41,151	[3],[11]	$ 41,255	[4],[27]
Investment, Identifier [Axis]: Staples Canada ULC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.02%	[3],[6],[11],[15],[75]	11.83%	[4],[8],[16],[27],[76]
Reference Rate and Spread		7%	[3],[6],[11],[15],[75]	7%	[4],[8],[16],[27],[76]
Principal		$ 13,146	[3],[6],[11],[15],[75]	$ 13,740	[4],[8],[16],[27],[76]
Cost		13,111	[3],[6],[11],[15],[75]	13,698	[4],[8],[16],[27],[76]
Fair value		$ 11,958	[3],[6],[11],[15],[75]	$ 12,481	[4],[8],[16],[27],[76]
Investment, Identifier [Axis]: Stellant Systems, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.54%	[9],[11],[14]	10.05%	[10],[26],[27]
Reference Rate and Spread		5.50%	[9],[11],[14]	5.50%	[10],[26],[27]
Principal		$ 7,585	[9],[11],[14]	$ 7,623	[10],[26],[27]
Cost		7,524	[9],[11],[14]	7,559	[10],[26],[27]
Fair value		$ 7,272	[9],[11],[14]	$ 7,166	[10],[26],[27]
Investment, Identifier [Axis]: Student Resource Center, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		5,907,649	[3]	5,907,649	[4]
Cost		$ 0	[3]	$ 0	[4]
Fair value		$ 0	[3]	$ 0	[4]
Investment, Identifier [Axis]: Student Resource Center, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.69%	[3]	13.27%	[4]
Reference Rate and Spread		8.50%	[3]	8.50%	[4]
Principal		$ 5,000	[3]	$ 5,000	[4]
Cost		4,556	[3]	4,556	[4]
Fair value		$ 4,556	[3]	$ 4,556	[4]
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		1,600		1,571
Cost		$ 4,500		$ 4,500
Fair value		$ 4,970		$ 4,500
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal		$ 20,500		$ 21,500
Cost		20,395		21,378
Fair value		$ 20,395		$ 21,378
Investment, Identifier [Axis]: Tacala Investment Corp., Secured Debt
Schedule of Investments [Line Items]
Total Rate		8.34%	[11],[48],[77]	7.88%	[27],[78],[79]
Reference Rate and Spread		3.50%	[11],[48],[77]	3.50%	[27],[78],[79]
Principal		$ 1,974	[11],[48],[77]	$ 1,974	[27],[78],[79]
Cost		1,974	[11],[48],[77]	1,974	[27],[78],[79]
Fair value		$ 1,943	[11],[48],[77]	$ 1,904	[27],[78],[79]
Investment, Identifier [Axis]: Team Public Choices, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		9.93%	[9],[11]	9.93%	[10],[27]
Reference Rate and Spread		5%	[9],[11]	5%	[10],[27]
Principal		$ 14,926	[9],[11]	$ 14,964	[10],[27]
Cost		14,666	[9],[11]	14,690	[10],[27]
Fair value		$ 14,552	[9],[11]	$ 14,290	[10],[27]
Investment, Identifier [Axis]: Tectonic Financial, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		200,000	[30]	200,000	[31]
Cost		$ 2,000	[30]	$ 2,000	[31]
Fair value		$ 5,170	[30]	$ 5,630	[31]
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)				544
Cost				$ 9,245
Fair value				$ 7,681
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		544
Cost		$ 9,245
Fair value		$ 6,871
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		2,219
Cost		$ 222
Fair value		$ 333
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal		$ 1,840		$ 1,840
Cost		1,840		1,840
Fair value		$ 1,840		$ 1,840
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal		$ 15,200		$ 15,200
Cost		15,195		15,192
Fair value		$ 15,123		$ 15,120
Investment, Identifier [Axis]: Televerde, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		460	[30]	460
Cost		$ 1,290	[30]	$ 1,290
Fair value		$ 6,599	[30]	$ 5,408
Investment, Identifier [Axis]: Televerde, LLC, Preferred Stock
Schedule of Investments [Line Items]
Units (in shares)		248		248
Cost		$ 718		$ 718
Fair value		$ 1,794		$ 1,794
Investment, Identifier [Axis]: Tex Tech Tennis, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		1,000,000	[3],[41]	1,000,000	[4],[42]
Cost		$ 1,000	[3],[41]	$ 1,000	[4],[42]
Fair value		$ 1,980	[3],[41]	$ 1,830	[4],[42]
Investment, Identifier [Axis]: The Affiliati Network, LLC, Preferred Stock
Schedule of Investments [Line Items]
Units (in shares)		1,280,000	[30]	1,280,000	[31]
Cost		$ 6,400	[30]	$ 6,400	[31]
Fair value		6,400	[30]	$ 6,400	[31]
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				13%
Principal		0	[32]	$ 120
Cost		(13)	[32]	106
Fair value		$ (13)	[32]	$ 106
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%		13%
Principal		$ 9,321		$ 9,521
Cost		9,249		9,442
Fair value		$ 9,249		$ 9,442
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		615	[30]	615	[31]
Cost		$ 4,655	[30]	$ 4,655	[31]
Fair value		9,306	[30]	7,800	[31]
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[32]	0	[28]
Cost		(4)	[32]	(5)	[28]
Fair value		$ 0	[32]	$ 0	[28]
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal		$ 7,920		$ 7,920
Cost		7,895		7,894
Fair value		$ 7,920		$ 7,920
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.16%	[9],[11],[14]	11.57%	[10],[26],[27]
Reference Rate and Spread		8.40%	[9],[11],[14]	1.25%	[10],[26],[27]
PIK Rate		7.25%	[9],[11],[14]	7.25%	[10],[26],[27]
Principal		$ 18,683	[9],[11],[14]	$ 18,352	[10],[26],[27]
Cost		18,620	[9],[11],[14]	18,284	[10],[26],[27]
Fair value		$ 4,904	[9],[11],[14]	$ 6,859	[10],[26],[27]
Investment, Identifier [Axis]: USA DeBusk LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.38%	[3],[11]	9.82%	[4],[27]
Reference Rate and Spread		5.75%	[3],[11]	5.75%	[4],[27]
Principal		$ 33,492	[3],[11]	$ 33,577	[4],[27]
Cost		32,983	[3],[11]	33,031	[4],[27]
Fair value		$ 33,492	[3],[11]	$ 33,577	[4],[27]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Common Stock
Schedule of Investments [Line Items]
Units (in shares)		945,507	[9]	945,507	[10]
Cost		$ 0	[9]	$ 0	[10]
Fair value		$ 0	[9]	$ 0	[10]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 1
Schedule of Investments [Line Items]
Units (in shares)		1,133,102	[9],[30]	1,133,102	[10],[31]
Total Rate		20%	[9],[30]	20%	[10],[31]
PIK Rate		20%	[9],[30]	20%	[10],[31]
Cost		$ 2,248	[9],[30]	$ 2,141	[10],[31]
Fair value		$ 2,833	[9],[30]	$ 2,833	[10],[31]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 2
Schedule of Investments [Line Items]
Units (in shares)		1,521,122	[9]	1,521,122	[10]
Total Rate		20%	[9]	20%	[10]
PIK Rate		20%	[9]	20%	[10]
Cost		$ 2,188	[9]	$ 2,188	[10]
Fair value		$ 2,376	[9]	$ 1,991	[10]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 3
Schedule of Investments [Line Items]
Units (in shares)		2,281,682	[9]	2,281,682	[10]
Total Rate		19%	[9]	19%	[10]
PIK Rate		19%	[9]	19%	[10]
Cost		$ 3,667	[9]	$ 3,667	[10]
Fair value		$ 0	[9]	$ 0	[10]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 4
Schedule of Investments [Line Items]
Units (in shares)		4,336,866	[9]	4,336,866	[10]
Total Rate		13.50%	[9]	13.50%	[10]
PIK Rate		13.50%	[9]	13.50%	[10]
Cost		$ 7,924	[9]	$ 7,924	[10]
Fair value		$ 0	[9]	$ 0	[10]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Convertible Debt
Schedule of Investments [Line Items]
Total Rate		15%	[9]	15%	[10]
PIK Rate		15%	[9]	15%	[10]
Principal		$ 2,494	[9]	$ 2,403	[10]
Cost		2,494	[9]	2,403	[10]
Fair value		$ 4,945	[9]	$ 4,592	[10]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		14.22%	[9],[11],[14]	10.76%	[10],[26],[27]
Reference Rate and Spread		7.50%	[9],[11],[14]	5.50%	[10],[26],[27]
PIK Rate		2%	[9],[11],[14]	2%	[10],[26],[27]
Principal		$ 407	[9],[11],[14]	$ 406	[10],[26],[27]
Cost		406	[9],[11],[14]	405	[10],[26],[27]
Fair value		$ 407	[9],[11],[14]	$ 382	[10],[26],[27]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.22%	[9],[11],[14]	10.76%	[10],[26],[27]
Reference Rate and Spread		7.50%	[9],[11],[14]	5.50%	[10],[26],[27]
PIK Rate		2%	[9],[11],[14]	2%	[10],[26],[27]
Principal		$ 1,821	[9],[11],[14]	$ 1,814	[10],[26],[27]
Cost		1,815	[9],[11],[14]	1,807	[10],[26],[27]
Fair value		$ 1,821	[9],[11],[14]	$ 1,712	[10],[26],[27]
Investment, Identifier [Axis]: UnionRock Energy Fund II, LP, LP Interests
Schedule of Investments [Line Items]
Units (percentage)	[5],[6],[30],[45]	11.11%
Total Rate	[7],[8],[31],[46]			11.11%
Cost		$ 4,067	[5],[6],[30],[45]	$ 3,734	[7],[8],[31],[46]
Fair value		$ 6,188	[5],[6],[30],[45]	$ 5,855	[7],[8],[31],[46]
Investment, Identifier [Axis]: Universal Wellhead Services Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		4,000,000	[3],[41]	4,000,000	[4],[42]
Cost		$ 4,000	[3],[41]	$ 4,000	[4],[42]
Fair value		$ 0	[3],[41]	$ 0	[4],[42]
Investment, Identifier [Axis]: Universal Wellhead Services Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		716,949	[3],[41]	716,949	[4],[42]
Total Rate		14%	[3],[41]	14%	[4],[42]
PIK Rate		14%	[3],[41]	14%	[4],[42]
Cost		$ 1,032	[3],[41]	$ 1,032	[4],[42]
Fair value		$ 218	[3],[41]	$ 220	[4],[42]
Investment, Identifier [Axis]: UserZoom Technologies, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[3],[11],[14]	12.13%
Reference Rate and Spread	[3],[11],[14]	7.50%
Principal	[3],[11],[14]	$ 4,000
Cost	[3],[11],[14]	3,885
Fair value	[3],[11],[14]	$ 3,885
Investment, Identifier [Axis]: VORTEQ Coil Finishers, LLC, Common Equity
Schedule of Investments [Line Items]
Units (in shares)		1,038,462	[3],[30]	1,038,462	[4],[31]
Cost		$ 1,038	[3],[30]	$ 1,038	[4],[31]
Fair value		$ 3,930	[3],[30]	$ 3,930	[4],[31]
Investment, Identifier [Axis]: VVS Holdco LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		11,840	[30],[41]	11,840	[31],[42]
Cost		$ 11,840	[30],[41]	$ 11,840	[31],[42]
Fair value		$ 12,040	[30],[41]	$ 11,940	[31],[42]
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6%	[11],[32],[41]	6%	[27],[28],[42]
Principal		$ 0	[11],[32],[41]	$ 0	[27],[28],[42]
Cost		(15)	[11],[32],[41]	(21)	[27],[28],[42]
Fair value		$ (15)	[11],[32],[41]	$ (21)	[27],[28],[42]
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.50%	[41]	11.50%	[42]
Principal		$ 30,400	[41]	$ 30,400	[42]
Cost		30,176	[41]	30,158	[42]
Fair value		$ 30,176	[41]	$ 30,161	[42]
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		5.25%	[9],[11],[32]	5.25%	[10],[27],[28]
Principal		$ 0	[9],[11],[32]	$ 0	[10],[27],[28]
Cost		(574)	[9],[11],[32]	(630)	[10],[27],[28]
Fair value		$ (574)	[9],[11],[32]	$ (630)	[10],[27],[28]
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.83%	[9],[11]	10.41%	[10],[27]
Reference Rate and Spread		6%	[9],[11]	6%	[10],[27]
Principal		$ 17,640	[9],[11]	$ 17,685	[10],[27]
Cost		17,352	[9],[11]	17,381	[10],[27]
Fair value		$ 15,196	[9],[11]	$ 15,479	[10],[27]
Investment, Identifier [Axis]: Vida Capital, Inc, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[10]			10.38%
Reference Rate and Spread	[10]			6%
Principal	[10]			$ 15,448
Cost	[10]			15,313
Fair value	[10]			$ 12,049
Investment, Identifier [Axis]: Vida Capital, Inc, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[9]	10.63%
Reference Rate and Spread	[9]	6%
Principal	[9]	$ 15,101
Cost	[9]	14,978
Fair value	[9]	$ 11,137
Investment, Identifier [Axis]: Vision Interests, Inc., Series A Preferred Stock
Schedule of Investments [Line Items]
Units (in shares)		3,000,000	[30]	3,000,000	[31]
Cost		$ 3,000	[30]	$ 3,000	[31]
Fair value		$ 3,000	[30]	$ 3,000	[31]
Investment, Identifier [Axis]: Vistar Media, Inc., Preferred Stock
Schedule of Investments [Line Items]
Units (in shares)		70,207	[3]	70,207	[4]
Cost		$ 767	[3]	$ 767	[4]
Fair value		$ 2,340	[3]	$ 2,250	[4]
Investment, Identifier [Axis]: Volusion, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		1,802,780
Cost		$ 2,576
Fair value		$ 0
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)				4,876,670
Cost				$ 14,000
Fair value				$ 0
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		4,876,670
Cost		$ 14,000
Fair value		$ 0
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		5,097,595
Cost		$ 11,446
Fair value		$ 11,446
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 3
Schedule of Investments [Line Items]
Units (in shares)		142,512
Cost		$ 0
Fair value		$ 0
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10%		11.50%	[40]
Principal		$ 2,100		$ 16,734	[40]
Cost		2,100		16,734	[40]
Fair value		$ 2,100		$ 14,914	[40]
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10%
Investment, Identifier [Axis]: Volusion, LLC, Unsecured Convertible Debt
Schedule of Investments [Line Items]
Total Rate				8%
Principal				$ 409
Cost				409
Fair value				$ 0
Investment, Identifier [Axis]: Volusion, LLC, Warrants
Schedule of Investments [Line Items]
Units (in shares)	[25]			1,831,355
Cost	[25]			$ 2,576
Fair value	[25]			$ 0
Investment, Identifier [Axis]: Wahoo Fitness Acquisition L.L.C., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[10],[26],[27]			10.64%
Reference Rate and Spread	[10],[26],[27]			5.75%
Principal	[10],[26],[27]			$ 14,625
Cost	[10],[26],[27]			14,268
Fair value	[10],[26],[27]			$ 8,409
Investment, Identifier [Axis]: Wahoo Fitness Acquisition L.L.C., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[9],[11],[14]	14.93%
Reference Rate and Spread	[9],[11],[14]	5.25%
PIK Rate	[9],[11],[14]	4.75%
Principal	[9],[11],[14]	$ 2,006
Cost	[9],[11],[14]	1,956
Fair value	[9],[11],[14]	$ 1,956
Investment, Identifier [Axis]: Wahoo Fitness Acquisition L.L.C., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[9],[11],[13],[14]	10.64%
Reference Rate and Spread	[9],[11],[13],[14]	5.75%
Principal	[9],[11],[13],[14]	$ 14,625
Cost	[9],[11],[13],[14]	14,284
Fair value	[9],[11],[13],[14]	$ 6,216
Investment, Identifier [Axis]: Wall Street Prep, Inc., Common Stock
Schedule of Investments [Line Items]
Units (in shares)		400,000	[3]	400,000	[4]
Cost		$ 400	[3]	$ 400	[4]
Fair value		$ 420	[3]	$ 420	[4]
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		7%	[3],[11],[32]	7%	[4],[27],[28]
Principal		$ 0	[3],[11],[32]	$ 0	[4],[27],[28]
Cost		(5)	[3],[11],[32]	(6)	[4],[27],[28]
Fair value		$ (5)	[3],[11],[32]	$ (6)	[4],[27],[28]
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.75%	[3],[11]	10.74%	[4],[27]
Reference Rate and Spread		7%	[3],[11]	7%	[4],[27]
Principal		$ 4,208	[3],[11]	$ 4,235	[4],[27]
Cost		4,151	[3],[11]	4,173	[4],[27]
Fair value		$ 4,124	[3],[11]	$ 4,146	[4],[27]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.07%	[3],[11],[80]	10.73%	[4],[27]
Reference Rate and Spread		6.25%	[3],[11],[80]	6%	[4],[27]
Principal		$ 1,945	[3],[11],[80]	$ 371	[4],[27]
Cost		1,911	[3],[11],[80]	334	[4],[27]
Fair value		$ 1,938	[3],[11],[80]	$ 370	[4],[27]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.98%	[3],[11]	10.73%	[4],[27]
Reference Rate and Spread		6%	[3],[11]	6%	[4],[27]
Principal		$ 390	[3],[11]	$ 391	[4],[27]
Cost		362	[3],[11]	361	[4],[27]
Fair value		$ 388	[3],[11]	$ 391	[4],[27]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.98%	[3],[11]	10.73%	[4],[27]
Reference Rate and Spread		6.25%	[3],[11]	6%	[4],[27]
Principal		$ 28,884	[3],[11]	$ 28,957	[4],[27]
Cost		28,542	[3],[11]	28,591	[4],[27]
Fair value		$ 28,780	[3],[11]	$ 28,947	[4],[27]
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		1,541,400	[3]	1,541,400	[4]
Cost		$ 1,541	[3]	$ 1,541	[4]
Fair value		$ 2,170	[3]	$ 1,950	[4]
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6%	[3],[11],[14],[32]	6%	[4],[26],[27],[28]
Principal		$ 0	[3],[11],[14],[32]	$ 0	[4],[26],[27],[28]
Cost		(19)	[3],[11],[14],[32]	(20)	[4],[26],[27],[28]
Fair value		$ (19)	[3],[11],[14],[32]	$ (20)	[4],[26],[27],[28]
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.79%	[3],[11],[14]	8.59%	[4],[26],[27]
Reference Rate and Spread		6%	[3],[11],[14]	6%	[4],[26],[27]
Principal		$ 10,767	[3],[11],[14]	$ 10,794	[4],[26],[27]
Cost		10,591	[3],[11],[14]	10,608	[4],[26],[27]
Fair value		$ 10,762	[3],[11],[14]	$ 10,685	[4],[26],[27]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		7%	[3],[11],[32]	7%	[4],[27],[28]
Principal		$ 0	[3],[11],[32]	$ 0	[4],[27],[28]
Cost		(32)	[3],[11],[32]	(34)	[4],[27],[28]
Fair value		$ 0	[3],[11],[32]	$ 0	[4],[27],[28]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 2
Schedule of Investments [Line Items]
Reference Rate and Spread		7%	[3],[11],[32]	7%	[4],[27],[28]
Principal		$ 0	[3],[11],[32]	$ 0	[4],[27],[28]
Cost		(16)	[3],[11],[32]	(17)	[4],[27],[28]
Fair value		$ (16)	[3],[11],[32]	$ (17)	[4],[27],[28]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.75%	[3],[11]	10.74%	[4],[27]
Reference Rate and Spread		7%	[3],[11]	7%	[4],[27]
Principal		$ 10,000	[3],[11]	$ 10,000	[4],[27]
Cost		9,854	[3],[11]	9,848	[4],[27]
Fair value		$ 9,999	[3],[11]	$ 9,992	[4],[27]
Investment, Identifier [Axis]: World Micro Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		3,845		3,845
Cost		$ 3,845		$ 3,845
Fair value		$ 3,845		$ 3,845
Investment, Identifier [Axis]: World Micro Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13%		13%
Principal		$ 14,280		$ 14,280
Cost		14,147		14,140
Fair value		$ 14,147		$ 14,140
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[3]	9.92%
Reference Rate and Spread		5.25%	[3]	5.25%	[4],[28]
Principal		$ 1,260	[3]	$ 0	[4],[28]
Cost		1,056	[3]	(218)	[4],[28]
Fair value		$ 1,248	[3]	$ (218)	[4],[28]
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.34%	[3]	10.84%	[4]
Reference Rate and Spread		5.25%	[3]	5.25%	[4]
Principal		$ 24,239	[3]	$ 24,300	[4]
Cost		23,827	[3]	23,864	[4]
Fair value		$ 24,019	[3]	$ 24,135	[4]
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.35%	[3]	8.63%	[4]
Reference Rate and Spread		5.25%	[3]	5.25%	[4]
Principal		$ 38,118	[3]	$ 38,311	[4]
Cost		37,532	[3]	37,691	[4]
Fair value		$ 37,772	[3]	$ 38,051	[4]
Investment, Identifier [Axis]: YS Garments, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.50%	[9],[11]	9.51%	[10],[27]
Reference Rate and Spread		6%	[9],[11]	5.50%	[10],[27]
Principal		$ 12,471	[9],[11]	$ 12,659	[10],[27]
Cost		12,192	[9],[11]	12,619	[10],[27]
Fair value		$ 11,226	[9],[11]	$ 12,127	[10],[27]
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		10,072		10,072
Cost		$ 2,834		$ 2,834
Fair value		$ 70		$ 240
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal		$ 450		$ 450
Cost		450		450
Fair value		$ 450		$ 450
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		6.50%		6.50%
Principal		$ 1,000		$ 1,000
Cost		1,000		1,000
Fair value		$ 945		$ 945
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		14%		14%
Principal		$ 2,750		$ 2,750
Cost		2,750		2,750
Fair value		$ 2,461		$ 2,676
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Warrants
Schedule of Investments [Line Items]
Units (in shares)		587	[24]	587	[25]
Cost		$ 600	[24]	$ 600	[25]
Fair value		$ 0	[24]	$ 0	[25]
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.15%	[3],[11],[14],[64]	11.67%	[4],[26],[27]
Reference Rate and Spread		7.25%	[3],[11],[14],[64]	7.25%	[4],[26],[27]
Principal		$ 17,468	[3],[11],[14],[64]	$ 17,512	[4],[26],[27]
Cost		17,287	[3],[11],[14],[64]	17,279	[4],[26],[27]
Fair value		$ 17,468	[3],[11],[14],[64]	$ 17,512	[4],[26],[27]
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.12%	[3],[11],[14],[64]	11.67%	[4],[26],[27],[79]
Reference Rate and Spread		7.25%	[3],[11],[14],[64]	7.25%	[4],[26],[27],[79]
Principal		$ 4,378	[3],[11],[14],[64]	$ 4,389	[4],[26],[27],[79]
Cost		4,357	[3],[11],[14],[64]	4,360	[4],[26],[27],[79]
Fair value		$ 4,372	[3],[11],[14],[64]	$ 4,379	[4],[26],[27],[79]
[1]Principal is net of repayments. Cost is net of repayments and accumulated unearned income. Negative cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan.[2] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. Private Loan portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Private Loan portfolio investments. Private Loan portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Private Loan portfolio investments. Other Portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Other Portfolio investments. Other Portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Other Portfolio investments. Middle Market portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Middle Market portfolio investments. Middle Market portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Middle Market portfolio investments. Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. Short-term portfolio investments. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of short-term portfolio investments. Short-term portfolio investments. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of short-term portfolio investments.

Consolidated Schedule of Inve_2

Consolidated Schedule of Investments (Parenthetical) $ in Thousands, $ in Millions		3 Months Ended		6 Months Ended	12 Months Ended
		Mar. 31, 2023 USD ($) $ / shares		Jun. 30, 2022 $ / shares	Dec. 31, 2022 USD ($) $ / shares		Mar. 31, 2023 CAD ($)		Dec. 31, 2022 CAD ($)		Mar. 31, 2022
Schedule of Investments [Line Items]
Percentage of loans with variable rate floors		92%			66%		92%		66%
Strike price (in dollars per share) | $ / shares		$ 0.01			$ 0.01
Arrow International, Inc
Schedule of Investments [Line Items]
Floor rate		2%			1%		2%		1%
Various Investment 1
Schedule of Investments [Line Items]
Floor rate		1%			1%		1%		1%
Various Investments 2
Schedule of Investments [Line Items]
Floor rate		1%					1%
Computer Data Source, LLC
Schedule of Investments [Line Items]
Floor rate		1%			1%		1%		1%
Dalton US Inc.
Schedule of Investments [Line Items]
Floor rate		1%					1%
GULF PACIFIC ACQUISITION, LLC
Schedule of Investments [Line Items]
Floor rate		1%					1%
Invincible Boat Company, LLC.
Schedule of Investments [Line Items]
Floor rate		1%					1%
Various Investments 3
Schedule of Investments [Line Items]
Floor rate		1%					1%
NWN Corporation
Schedule of Investments [Line Items]
Floor rate		1%			1%		1%		1%
Watterson Brands, LLC
Schedule of Investments [Line Items]
Floor rate		1%					1%
Bolder Panther Group, LLC
Schedule of Investments [Line Items]
Floor rate		1.50%			1.50%		1.50%		1.50%
Channel Partners Intermediateco, LLC
Schedule of Investments [Line Items]
Floor rate					1%				1%
Cadence Aerospace LLC
Schedule of Investments [Line Items]
Floor rate					1%				1%
PIK Rate					2%				2%
IG Parent Corporation
Schedule of Investments [Line Items]
Floor rate					1%				1%
Channel Partners Intermediateco, LLC
Schedule of Investments [Line Items]
Floor rate					1%				1%
Mako Steel, LP
Schedule of Investments [Line Items]
Floor rate					0.75%				0.75%
Paragon Healthcare, Inc.
Schedule of Investments [Line Items]
Floor rate					1%				1%
RTIC Subsidiary Holdings, LLC
Schedule of Investments [Line Items]
Floor rate					1.25%				1.25%
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt
Schedule of Investments [Line Items]
Principal	[1]				$ 11,726
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Principal	[2]	$ 320
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Principal	[2]	$ 12,285
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		5%	[3],[4]		6%	[5],[6],[7],[8]	5%	[3],[4]	6%	[5],[6],[7],[8]
Principal		$ 371	[3],[4]		$ 0	[5],[6],[7],[8]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[9],[10]		6%	[5],[6],[7]	6%	[3],[4],[9],[10]	6%	[5],[6],[7]
Principal		$ 2,224	[3],[4],[9],[10]		$ 741	[5],[6],[7]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[9]		6%	[5],[6],[7]	6%	[3],[4],[9]	6%	[5],[6],[7]
Principal		$ 17,786	[3],[4],[9]		$ 17,052	[5],[6],[7]
Investment, Identifier [Axis]: ADS Tactical, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.75%	[2],[4]		5.75%	[1],[7]	5.75%	[2],[4]	5.75%	[1],[7]
Principal		$ 20,712	[2],[4]		$ 21,077	[1],[7]
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.40%	[3],[4],[9],[11]		7.40%	[5],[6],[7],[8]	7.40%	[3],[4],[9],[11]	7.40%	[5],[6],[7],[8]
Principal		$ 0	[3],[4],[9],[11]		$ 0	[5],[6],[7],[8]
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.40%	[3],[4],[9]		7.40%	[5],[6],[7]	7.40%	[3],[4],[9]	7.40%	[5],[6],[7]
Principal		$ 37,358	[3],[4],[9]		$ 37,491	[5],[6],[7]
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		400			400
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 1,650			$ 1,650
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Secured Debt
Schedule of Investments [Line Items]
Variable rate											10%
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		10%					10%
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		10%					10%
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[9]		5.50%	[5],[6],[7],[8]	6.50%	[3],[4],[9]	5.50%	[5],[6],[7],[8]
Principal		$ 360	[3],[4],[9]		$ 0	[5],[6],[7],[8]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		5.50%	[3],[4],[9]		5.50%	[5],[6],[7]	5.50%	[3],[4],[9]	5.50%	[5],[6],[7]
Principal		$ 6,660	[3],[4],[9]		$ 6,660	[5],[6],[7]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4],[9]		7.50%	[5],[6],[7]	7.50%	[3],[4],[9]	7.50%	[5],[6],[7]
Principal		$ 6,660	[3],[4],[9]		$ 6,660	[5],[6],[7]
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		1,922	[3],[12]		1,901	[5],[13]
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 3,015	[3],[12]		$ 3,015	[5],[13]
Investment, Identifier [Axis]: ATX Networks Corp., Secured Debt
Schedule of Investments [Line Items]
Variable rate		7.50%			7.50%	[1],[7]	7.50%		7.50%	[1],[7]	7.50%
Principal	[1],[7]				$ 6,783
Investment, Identifier [Axis]: ATX Networks Corp., Unsecured Debt
Schedule of Investments [Line Items]
Principal	[1]				$ 3,396
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.75%	[3],[4],[9]		7.25%	[5],[6],[7],[8]	7.75%	[3],[4],[9]	7.25%	[5],[6],[7],[8]
Principal		$ 2,210	[3],[4],[9]		$ 0	[5],[6],[7],[8]
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.75%	[3],[4],[9]		7.25%	[5],[6],[7]	7.75%	[3],[4],[9]	7.25%	[5],[6],[7]
Principal		$ 28,999	[3],[4],[9]		$ 29,071	[5],[6],[7]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4]		8.50%	[5],[7]	7.50%	[3],[4]	8.50%	[5],[7]
Principal		$ 1,678	[3],[4]		$ 1,678	[5],[7]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4]		8.50%	[5],[7]	7.50%	[3],[4]	8.50%	[5],[7]
Principal		$ 9,756	[3],[4]		$ 9,891	[5],[7]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		11.50%	[3],[4]		12.50%	[5],[7]	11.50%	[3],[4]	12.50%	[5],[7]
Principal		$ 796	[3],[4]		$ 807	[5],[7]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		9.50%	[3],[4]		9.50%	[5],[7]	9.50%	[3],[4]	9.50%	[5],[7]
Principal		$ 14,618	[3],[4]		$ 14,618	[5],[7]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		9.50%	[3],[4]		9%	[5],[7]	9.50%	[3],[4]	9%	[5],[7]
Principal		$ 728	[3],[4]		$ 4,368	[5],[7]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Variable rate	[3],[4]	9.50%					9.50%
Principal	[3],[4]	$ 4,368
Investment, Identifier [Axis]: Acumera, Inc., Warrants
Schedule of Investments [Line Items]
Strike price (in dollars per share) | $ / shares		$ 1
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[14]		6%	[5],[7],[15]	6.50%	[3],[4],[14]	6%	[5],[7],[15]
Principal		$ 7,488	[3],[4],[14]		$ 4,729	[5],[7],[15]
Interest rate		3.50%			2.50%		3.50%		2.50%
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4],[16]		7.50%	[5],[7],[15]	7.50%	[3],[4],[16]	7.50%	[5],[7],[15]
Principal		$ 23,024	[3],[4],[16]		$ 24,086	[5],[7],[15]
Interest rate		2.50%			2.50%		2.50%		2.50%
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[11]		6%	[5],[7],[8]	6%	[3],[4],[11]	6%	[5],[7],[8]
Principal		$ 0	[3],[4],[11]		$ 0	[5],[7],[8]
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4]		6%	[5],[7]	6%	[3],[4]	6%	[5],[7]
Principal		$ 6,600	[3],[4]		$ 6,617	[5],[7]
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.75%	[3],[4],[9]		6.75%	[5],[6],[7]	6.75%	[3],[4],[9]	6.75%	[5],[6],[7]
Principal		$ 14,839	[3],[4],[9]		$ 15,628	[5],[6],[7]
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		8.75%	[3],[4],[9]		8.75%	[5],[6],[7]	8.75%	[3],[4],[9]	8.75%	[5],[6],[7]
Principal		$ 14,839	[3],[4],[9]		$ 15,628	[5],[6],[7]
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.50%	[2],[12]		6.50%	[1],[13]	6.50%	[2],[12]	6.50%	[1],[13]
Principal		$ 2,980	[2],[12]		$ 2,980	[1],[13]
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.50%	[2],[4],[12]		6.50%	[1],[7],[13]	6.50%	[2],[4],[12]	6.50%	[1],[7],[13]
Principal		$ 14,370	[2],[4],[12]		$ 14,370	[1],[7],[13]
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		10%	[4],[11]		10%	[7],[8]	10%	[4],[11]	10%	[7],[8]
Principal		$ 0	[4],[11]		$ 0	[7],[8]
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		10%	[4]		10%	[7]	10%	[4]	10%	[7]
Principal		$ 4,595	[4]		$ 4,665	[7]
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[9]		9%	[5],[7]	7%	[3],[4],[9]	9%	[5],[7]
Principal		$ 4,678	[3],[4],[9]		$ 4,678	[5],[7]
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[9]		9%	[5],[7]	7%	[3],[4],[9]	9%	[5],[7]
Principal		$ 29,494	[3],[4],[9]		$ 29,722	[5],[7]
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[9],[11]		6.50%	[5],[6],[7],[8]	6%	[3],[4],[9],[11]	6.50%	[5],[6],[7],[8]
Principal		$ 0	[3],[4],[9],[11]		$ 0	[5],[6],[7],[8]
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[9]		6.50%	[5],[6],[7]	6%	[3],[4],[9]	6.50%	[5],[6],[7]
Principal		$ 65,171	[3],[4],[9]		$ 67,597	[5],[6],[7]
Investment, Identifier [Axis]: Arrow International, Inc, Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.40%	[3],[4],[17]		6.60%	[5],[6],[7],[18]	5.40%	[3],[4],[17]	6.60%	[5],[6],[7],[18]
Principal		$ 36,000	[3],[4],[17]		$ 36,000	[5],[6],[7],[18]
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt
Schedule of Investments [Line Items]
Variable rate											11%
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 1
Schedule of Investments [Line Items]
Variable rate		11%	[4],[19]		11%	[7],[20]	11%	[4],[19]	11%	[7],[20]
Principal		$ 800	[4],[19]		$ 800	[7],[20]
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 2
Schedule of Investments [Line Items]
Variable rate		11%	[4],[19]		11%	[7],[20]	11%	[4],[19]	11%	[7],[20]
Principal		$ 4,000	[4],[19]		$ 4,000	[7],[20]
Investment, Identifier [Axis]: Barfly Ventures, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		711	[3]		711	[5]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[11]		0	[8]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		10,575			0	[8]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Principal					11,025
Investment, Identifier [Axis]: Berry Aviation, Inc., Secured Debt
Schedule of Investments [Line Items]
Principal		$ 197	[3]		$ 195	[5]
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[9],[11]		1%	[5],[6],[7],[8]	7%	[3],[4],[9],[11]	1%	[5],[6],[7],[8]
Principal		$ 0	[3],[4],[9],[11]		$ 0	[5],[6],[7],[8]
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[9]		1%	[5],[6],[7]	7%	[3],[4],[9]	1%	[5],[6],[7]
Principal		$ 27,919	[3],[4],[9]		$ 27,505	[5],[6],[7]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.50%	[2],[4]		8.50%	[1],[7],[8]	7.50%	[2],[4]	8.50%	[1],[7],[8]
Principal		$ 1,211	[2],[4]		$ 0	[1],[7],[8]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		8.50%	[2],[4]		8.50%	[1],[7]	8.50%	[2],[4]	8.50%	[1],[7]
Principal		$ 3,309	[2],[4]		$ 3,239	[1],[7]
Investment, Identifier [Axis]: Boccella Precast Products LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 320			$ 320
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		9.22%	[4],[9],[21]		9.26%	[6],[7],[22]	9.22%	[4],[9],[21]	9.26%	[6],[7],[22]	9%
Principal		$ 98,535	[4],[9],[21]		$ 99,194	[6],[7],[22]
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		9.22%					9.22%
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		9.25%	[4],[12],[19]		9.25%	[5],[7],[13],[20]	9.25%	[4],[12],[19]	9.25%	[5],[7],[13],[20]
Principal		$ 761	[4],[12],[19]		$ 761	[5],[7],[13],[20]
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		9.25%	[4],[12],[19]		9.25%	[5],[7],[13],[20]	9.25%	[4],[12],[19]	9.25%	[5],[7],[13],[20]
Principal		$ 7,056	[4],[12],[19]		$ 7,056	[5],[7],[13],[20]
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		10%	[4]		10%	[7]	10%	[4]	10%	[7]	10%
Principal		$ 5,840	[4]		$ 5,964	[7]
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Principal		8,813			8,813
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Principal		1,000	[23]		1,000	[24]
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate											11.25%
Principal		$ 16,980			$ 17,355
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		5%	[3],[4]		5%	[5],[7],[8]	5%	[3],[4]	5%	[5],[7],[8]
Principal		$ 774	[3],[4]		$ 0	[5],[7],[8]
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		5%	[3],[4]		5%	[5],[7]	5%	[3],[4]	5%	[5],[7]
Principal		$ 19,832	[3],[4]		$ 19,933	[5],[7]
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate	[5],[7],[25]				8.50%				8.50%
Principal	[5],[7],[25]				$ 28,328
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[3],[4]	6.50%					6.50%
Principal	[3],[4]	$ 14,373
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate	[3],[4]	6.50%					6.50%
Principal	[3],[4]	$ 4,472
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate	[3],[4]	6.50%					6.50%
Principal	[3],[4]	$ 5,883
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 4
Schedule of Investments [Line Items]
Variable rate	[3],[4]	6.50%					6.50%
Principal	[3],[4]	$ 1,687
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 5
Schedule of Investments [Line Items]
Variable rate	[3],[4]	6.50%					6.50%
Principal	[3],[4]	$ 2,476
Investment, Identifier [Axis]: California Splendor Holdings LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		10%	[4]		10%	[7]	10%	[4]	10%	[7]	10%
Principal		$ 28,000	[4]		$ 28,000	[7]
Investment, Identifier [Axis]: Camin Cargo Control, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate		6.50%	[2],[4],[9]		6.50%	[1],[7]	6.50%	[2],[4],[9]	6.50%	[1],[7]
Principal		$ 15,178	[2],[4],[9]		$ 15,218	[1],[7]
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[4],[11]		6%	[7],[8]	6%	[4],[11]	6%	[7],[8]
Principal		$ 0	[4],[11]		$ 0	[7],[8]
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 20,250			$ 20,250
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[11]		6%	[5],[7],[8]	6%	[3],[4],[11]	6%	[5],[7],[8]
Principal		$ 0	[3],[4],[11]		$ 0	[5],[7],[8]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4]		6%	[5],[7]	6%	[3],[4]	6%	[5],[7]
Principal		$ 7,993	[3],[4]		$ 7,993	[5],[7]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4]		5.75%	[5],[7]	6%	[3],[4]	5.75%	[5],[7]
Principal		$ 6,133	[3],[4]		$ 6,133	[5],[7]
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate											10%
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		9%	[4],[11]		9%	[7],[8]	9%	[4],[11]	9%	[7],[8]
Principal		$ 0	[4],[11]		$ 0	[7],[8]
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		9%	[4]		9%	[7]	9%	[4]	9%	[7]
Principal		$ 15,030	[4]		$ 15,030	[7]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate											8%
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[4],[9],[11]		6%	[7],[8]	6%	[4],[9],[11]	6%	[7],[8]
Principal		$ 0	[4],[9],[11]		$ 0	[7],[8]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		8%	[4],[9]		8%	[7]	8%	[4],[9]	8%	[7]
Principal		$ 16,945	[4],[9]		$ 16,945	[7]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[9],[26]		6.25%	[5],[6],[7],[27]	6.25%	[3],[4],[9],[26]	6.25%	[5],[6],[7],[27]
Principal		$ 1,868	[3],[4],[9],[26]		$ 1,868	[5],[6],[7],[27]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[9],[26]		6.25%	[5],[6],[7],[28]	6.25%	[3],[4],[9],[26]	6.25%	[5],[6],[7],[28]
Principal		$ 38,918	[3],[4],[9],[26]		$ 39,047	[5],[6],[7],[28]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate	[3],[4],[9]	6.25%					6.25%
Principal	[3],[4],[9]	$ 4,930
Investment, Identifier [Axis]: Charps, LLC, Unsecured Debt
Schedule of Investments [Line Items]
Principal		$ 5,694			$ 5,694
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		9%	[4],[9],[11]		9%	[6],[7],[8]	9%	[4],[9],[11]	9%	[6],[7],[8]	9.50%
Principal		$ 0	[4],[9],[11]		$ 0	[6],[7],[8]
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		9%	[4],[9]		9%	[6],[7]	9%	[4],[9]	9%	[6],[7]
Principal		$ 10,000	[4],[9]		$ 10,480	[6],[7]
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Principal		1,040			1,049
Investment, Identifier [Axis]: Clarius BIGS, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 2,696	[3],[12],[19]		$ 2,712	[5],[13],[20]
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[4]		6%	[7]	6%	[4]	6%	[7]	6%
Principal		$ 4,560	[4]		$ 4,560	[7]
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 19,274			$ 19,274
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate											10.50%
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		10.50%	[4]		10.50%	[7]	10.50%	[4]	10.50%	[7]
Principal		$ 1,054	[4]		$ 1,462	[7]
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		10.50%	[4]		10.50%	[7]	10.50%	[4]	10.50%	[7]
Principal		$ 40,377	[4]		$ 40,801	[7]
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[11]		0	[8]
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 22,995			$ 23,310
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		9%	[4]				9%	[4]			9%
Principal	[4]	$ 4,869
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		9%			9%	[7],[8],[20]	9%		9%	[7],[8],[20]
Principal	[7],[8],[20]				$ 0
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		9%			9%	[7]	9%		9%	[7]
Principal	[7]				$ 5,241
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4],[29]		8%	[5],[7],[30]	7.50%	[3],[4],[29]	8%	[5],[7],[30]
Principal		$ 5,000	[3],[4],[29]		$ 5,000	[5],[7],[30]
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4]		8%	[5],[7]	7.50%	[3],[4]	8%	[5],[7]
Principal		$ 18,588	[3],[4]		$ 18,588	[5],[7]
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 21,200			$ 21,200
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4],[11]		7.50%	[5],[7],[8]	7.50%	[3],[4],[11]	7.50%	[5],[7],[8]
Principal		$ 0	[3],[4],[11]		$ 0	[5],[7],[8]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4]		7.50%	[5],[7]	7.50%	[3],[4]	7.50%	[5],[7]
Principal		$ 5,634	[3],[4]		$ 6,074	[5],[7]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4],[9],[31]		8%	[5],[6],[7]	7.50%	[3],[4],[9],[31]	8%	[5],[6],[7]
Principal		$ 3,212	[3],[4],[9],[31]		$ 1,092	[5],[6],[7]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4],[9],[11]		8%	[5],[6],[7],[8]	7.50%	[3],[4],[9],[11]	8%	[5],[6],[7],[8]
Principal		$ 0	[3],[4],[9],[11]		$ 0	[5],[6],[7],[8]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4],[9]		8%	[5],[6],[7]	7.50%	[3],[4],[9]	8%	[5],[6],[7]
Principal		$ 14,317	[3],[4],[9]		$ 14,389	[5],[6],[7]
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		450			223
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 8,555			$ 8,622
Investment, Identifier [Axis]: Digital Products Holdings LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		10%	[4]		10%	[7]	10%	[4]	10%	[7]	10%
Principal		$ 15,203	[4]		$ 15,533	[7]
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate											11%
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[7],[8]				11%				11%
Principal		0	[11]		$ 0	[7],[8]
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate	[7]				11%				11%
Principal		$ 26,876			$ 27,267	[7]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		4.50%	[3],[4],[9]		4.50%	[5],[6],[7]	4.50%	[3],[4],[9]	4.50%	[5],[6],[7]
Principal		$ 1,875	[3],[4],[9]		$ 1,875	[5],[6],[7]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[9]		6.50%	[5],[6],[7]	6.50%	[3],[4],[9]	6.50%	[5],[6],[7]
Principal		$ 1,875	[3],[4],[9]		$ 1,875	[5],[6],[7]
Investment, Identifier [Axis]: EPIC Y-Grade Services, LP, Secured Debt
Schedule of Investments [Line Items]
Variable rate		6%	[2],[4]		6%	[1],[7]	6%	[2],[4]	6%	[1],[7]
Principal		$ 6,806	[2],[4]		$ 6,823	[1],[7]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		8%	[3],[4],[9]		7%	[5],[7]	8%	[3],[4],[9]	7%	[5],[7]
Principal		$ 3,495	[3],[4],[9]		$ 3,346	[5],[7]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		8%	[3],[4],[9]		7%	[5],[7]	8%	[3],[4],[9]	7%	[5],[7]
Principal		$ 4,989	[3],[4],[9]		$ 5,021	[5],[7]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		8%	[3],[4],[9]		7%	[5],[7]	8%	[3],[4],[9]	7%	[5],[7]
Principal		$ 23,305	[3],[4],[9]		$ 23,456	[5],[7]
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[4],[9],[11]		6%	[6],[7],[8]	6%	[4],[9],[11]	6%	[6],[7],[8]
Principal		$ 0	[4],[9],[11]		$ 0	[6],[7],[8]
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		18,773			18,773
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Principal		$ 6,346			$ 6,357
Investment, Identifier [Axis]: Emerald Technologies Acquisition Co, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate		6.25%	[2],[4],[9]		6.25%	[1],[6],[7]	6.25%	[2],[4],[9]	6.25%	[1],[6],[7]
Principal		$ 9,199	[2],[4],[9]		$ 9,258	[1],[6],[7]
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[9]		6.50%	[5],[6],[7]	6.50%	[3],[4],[9]	6.50%	[5],[6],[7]
Principal		$ 983	[3],[4],[9]		$ 131	[5],[6],[7]
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[9]		6.50%	[5],[6],[7]	6.50%	[3],[4],[9]	6.50%	[5],[6],[7]
Principal		$ 16,256	[3],[4],[9]		$ 16,338	[5],[6],[7]
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[9],[23]		7%	[5],[7],[24]	7%	[3],[4],[9],[23]	7%	[5],[7],[24]
Principal		$ 3,692	[3],[4],[9],[23]		$ 3,692	[5],[7],[24]
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[9],[23]		7%	[5],[7],[24]	7%	[3],[4],[9],[23]	7%	[5],[7],[24]
Principal		$ 44,308	[3],[4],[9],[23]		$ 44,308	[5],[7],[24]
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.50%	[4]		6.50%	[7]	6.50%	[4]	6.50%	[7]	6.50%
Principal		$ 7,600	[4]		$ 7,600	[7]
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		9%	[4]		9%	[7]	9%	[4]	9%	[7]	11%
Principal		$ 21,200	[4]		$ 21,200	[7]
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4],[9]		7.50%	[5],[6],[7]	7.50%	[3],[4],[9]	7.50%	[5],[6],[7]
Principal		$ 982	[3],[4],[9]		$ 736	[5],[6],[7]
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4],[9]		7.50%	[5],[6],[7]	7.50%	[3],[4],[9]	7.50%	[5],[6],[7]
Principal		$ 11,095	[3],[4],[9]		$ 11,095	[5],[6],[7]
Investment, Identifier [Axis]: Fuse, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		1,810	[2]		1,810	[1]
Investment, Identifier [Axis]: GFG Group, LLC., Secured Debt
Schedule of Investments [Line Items]
Principal		$ 11,345			$ 11,345
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate											8%
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%			6%		6%		6%
Principal		$ 965			$ 670
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		8%			8%		8%		8%
Principal		$ 40,493			$ 40,493
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4]		6.50%	[5],[7]	6.50%	[3],[4]	6.50%	[5],[7]
Principal		$ 1,136	[3],[4]		$ 2,177	[5],[7]
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4]		6.50%	[5],[7]	6.50%	[3],[4]	6.50%	[5],[7]
Principal		$ 10,707	[3],[4]		$ 10,734	[5],[7]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[9],[32]		6%	[5],[6],[7]	6%	[3],[4],[9],[32]	6%	[5],[6],[7]
Principal		$ 353	[3],[4],[9],[32]		$ 252	[5],[6],[7]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[9]		6%	[5],[6],[7],[8]	6%	[3],[4],[9]	6%	[5],[6],[7],[8]
Principal		$ 303	[3],[4],[9]		$ 0	[5],[6],[7],[8]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[9]		6%	[5],[6],[7]	6%	[3],[4],[9]	6%	[5],[6],[7]
Principal		$ 3,642	[3],[4],[9]		$ 3,661	[5],[6],[7]
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate											8.50%
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		8.50%	[4],[9],[11]		8.50%	[6],[7],[8]	8.50%	[4],[9],[11]	8.50%	[6],[7],[8]
Principal		$ 0	[4],[9],[11]		$ 0	[6],[7],[8]
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		8.50%	[4],[9],[33]		8.50%	[6],[7]	8.50%	[4],[9],[33]	8.50%	[6],[7]
Principal		$ 63,278	[4],[9],[33]		$ 64,078	[6],[7]
Interest rate		3%					3%
Investment, Identifier [Axis]: Garreco, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		10%	[4],[34]		8%	[7],[35]	10%	[4],[34]	8%	[7],[35]	8%
Principal		$ 3,549	[4],[34]		$ 3,826	[7],[35]
Interest rate		2%			1.50%		2%		1.50%
Investment, Identifier [Axis]: GeoStabilization International (GSI), Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.25%	[2],[9]		5.25%	[1],[6]	5.25%	[2],[9]	5.25%	[1],[6]
Principal		$ 20,444	[2],[9]		$ 20,497	[1],[6]
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		9.50%	[4],[11]		9.50%	[7],[8]	9.50%	[4],[11]	9.50%	[7],[8]
Principal		$ 0	[4],[11]		$ 0	[7],[8]
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 2,400			$ 2,400
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		9.50%	[3],[4],[9]		9.50%	[5],[6],[7]	9.50%	[3],[4],[9]	9.50%	[5],[6],[7]
Principal		$ 332	[3],[4],[9]		$ 320	[5],[6],[7]
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		9.50%	[3],[4],[9]		9.50%	[5],[6],[7]	9.50%	[3],[4],[9]	9.50%	[5],[6],[7]
Principal		$ 3,394	[3],[4],[9]		$ 3,277	[5],[6],[7]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[9],[11]		6.50%	[5],[6],[7],[8]	6.50%	[3],[4],[9],[11]	6.50%	[5],[6],[7],[8]
Principal		$ 0	[3],[4],[9],[11]		$ 0	[5],[6],[7],[8]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[9],[11]		6.50%	[5],[6],[7],[8]	6.50%	[3],[4],[9],[11]	6.50%	[5],[6],[7],[8]
Principal		$ 0	[3],[4],[9],[11]		$ 0	[5],[6],[7],[8]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[9]		6.50%	[5],[6],[7]	6.50%	[3],[4],[9]	6.50%	[5],[6],[7]
Principal		$ 16,748	[3],[4],[9]		$ 16,791	[5],[6],[7]
Investment, Identifier [Axis]: HOWLCO LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		6%	[2],[4],[36],[37]		6%	[1],[7],[38],[39]	6%	[2],[4],[36],[37]	6%	[1],[7],[38],[39]
Principal		$ 25,226	[2],[4],[36],[37]		$ 25,290	[1],[7],[38],[39]
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[4]		6%	[7]	6%	[4]	6%	[7]	6%
Principal		$ 4,000	[4]		$ 3,185	[7]
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 37,800			$ 37,800
Investment, Identifier [Axis]: Heartland Dental, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4]		6.50%	[5],[7]	6.50%	[3],[4]	6.50%	[5],[7]
Principal		$ 14,588	[3],[4]		$ 14,663	[5],[7]
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Unsecured Convertible Debt
Schedule of Investments [Line Items]
Principal		$ 3,000			$ 3,000
Investment, Identifier [Axis]: Hybrid Promotions, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		8.25%	[3],[4],[9]		8.25%	[5],[6]	8.25%	[3],[4],[9]	8.25%	[5],[6]
Principal		$ 7,088	[3],[4],[9]		$ 7,088	[5],[6]
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[1],[6],[7],[40]				5.75%				5.75%
Principal	[1],[6],[7],[40]				$ 698
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		5.75%	[2],[4],[9],[11]		5.75%	[1],[6],[7]	5.75%	[2],[4],[9],[11]	5.75%	[1],[6],[7]
Principal		$ 0	[2],[4],[9],[11]		$ 14,499	[1],[6],[7]
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate	[2],[4],[9]	5.75%					5.75%
Principal	[2],[4],[9]	$ 14,475
Investment, Identifier [Axis]: INW Manufacturing, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.75%	[2],[4]		5.75%	[1],[7]	5.75%	[2],[4]	5.75%	[1],[7]
Principal		$ 6,938	[2],[4]		$ 7,125	[1],[7]
Investment, Identifier [Axis]: Implus Footcare, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		7.75%	[3],[4],[9]		7.75%	[5],[7]	7.75%	[3],[4],[9]	7.75%	[5],[7]
Principal		$ 18,568	[3],[4],[9]		$ 18,515	[5],[7]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4]		5.50%	[5],[7],[41]	7.50%	[3],[4]	5.50%	[5],[7],[41]
Principal		$ 7,294	[3],[4]		$ 7,027	[5],[7],[41]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 18,428	[3],[12]		$ 18,428	[5],[13]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		10%	[3],[9]		10%	[5],[6]	10%	[3],[9]	10%	[5],[6]
Principal		$ 2,378	[3],[9]		$ 806	[5],[6]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Variable rate	[3],[9]	10%					10%
Principal	[3],[9]	$ 2,474
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Warrants
Schedule of Investments [Line Items]
Strike price (in dollars per share) | $ / shares		$ 1.50			$ 1
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.75%	[3],[4]		6.75%	[5],[7]	6.75%	[3],[4]	6.75%	[5],[7]
Principal		$ 1,004	[3],[4]		$ 463	[5],[7]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.75%	[3],[4]		6.75%	[5],[7]	6.75%	[3],[4]	6.75%	[5],[7]
Principal		$ 19,190	[3],[4]		$ 19,239	[5],[7]
Investment, Identifier [Axis]: Infinity X1 Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 18,000
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		5.50%	[3],[4],[11]		5.50%	[5],[7],[8]	5.50%	[3],[4],[11]	5.50%	[5],[7],[8]
Principal		$ 0	[3],[4],[11]		$ 0	[5],[7],[8]
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		5.50%	[3],[4]		5.50%	[5],[7]	5.50%	[3],[4]	5.50%	[5],[7]
Principal		$ 8,593	[3],[4]		$ 8,593	[5],[7]
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		10%	[3]		10%	[5],[42]	10%	[3]	10%	[5],[42]
Principal		$ 1,835	[3]		$ 1,682	[5],[42]
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[12]		7%	[5],[7],[13]	7%	[3],[4],[12]	7%	[5],[7],[13]
Principal		$ 7,313	[3],[4],[12]		$ 7,313	[5],[7],[13]
Investment, Identifier [Axis]: Intermedia Holdings, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate		6%	[2],[4]		6%	[1],[7]	6%	[2],[4]	6%	[1],[7]
Principal		$ 20,414	[2],[4]		$ 20,467	[1],[7]
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[43]		6.50%	[5],[7]	6.50%	[3],[4],[43]	6.50%	[5],[7]
Principal		$ 726	[3],[4],[43]		$ 622	[5],[7]
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4]		6.50%	[5],[7]	6.50%	[3],[4]	6.50%	[5],[7]
Principal		$ 16,889	[3],[4]		$ 16,889	[5],[7]
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		4,534			4,534
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		3,154			3,154
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Principal		8,944			8,944
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Principal		19,712			$ 19,712
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 5
Schedule of Investments [Line Items]
Principal		$ 11,200
Investment, Identifier [Axis]: Isagenix International, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		7.75%	[2],[4],[12]		7.75%	[1],[7],[13]	7.75%	[2],[4],[12]	7.75%	[1],[7],[13]
Principal		$ 5,053	[2],[4],[12]		$ 5,053	[1],[7],[13]
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[11]		6%	[5],[7],[8]	6%	[3],[4],[11]	6%	[5],[7],[8]
Principal		$ 0	[3],[4],[11]		$ 0	[5],[7],[8]
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4]		6%	[5],[7]	6%	[3],[4]	6%	[5],[7]
Principal		$ 36,711	[3],[4]		$ 36,947	[5],[7]
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4]		7.50%	[5],[7]	7.50%	[3],[4]	7.50%	[5],[7]
Principal		$ 488	[3],[4]		$ 500	[5],[7]
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4]		7.50%	[5],[7]	7.50%	[3],[4]	7.50%	[5],[7]
Principal		$ 2,027	[3],[4]		$ 2,079	[5],[7]
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate											6.75%
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.75%	[11]		6.75%	[8]	6.75%	[11]	6.75%	[8]
Principal		$ 0	[11]		$ 0	[8]
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.75%	[4]		6.75%	[7]	6.75%	[4]	6.75%	[7]
Principal		$ 2,450	[4]		$ 2,450	[7]
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[2],[9]	18%					18%
Principal		$ 2,431	[2],[9]		2,297	[1]
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate	[2],[9],[12]	16%					16%
Principal		$ 4,034	[2],[9],[12]		$ 4,034	[1],[13]
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate											11.50%
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		11.50%	[4],[11]		11.50%	[7],[8]	11.50%	[4],[11]	11.50%	[7],[8]
Principal		$ 0	[4],[11]		$ 0	[7],[8]
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		11.50%	[4]		11.50%	[7]	11.50%	[4]	11.50%	[7]
Principal		$ 9,999	[4]		$ 9,999	[7]
Investment, Identifier [Axis]: JorVet Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		25,650			$ 25,650
Investment, Identifier [Axis]: KBK Industries, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 5,750
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4]		7.25%	[5],[7]	7.25%	[3],[4]	7.25%	[5],[7]
Principal		$ 1,053	[3],[4]		$ 1,064	[5],[7]
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4]		7.25%	[5],[7]	7.25%	[3],[4]	7.25%	[5],[7]
Principal		$ 7,486	[3],[4]		$ 7,505	[5],[7]
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		20,599			20,415
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 3,869			$ 3,879
Investment, Identifier [Axis]: Kore Wireless Group Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.50%	[2],[9]		5.50%	[1],[6]	5.50%	[2],[9]	5.50%	[1],[6]
Principal		$ 11,297	[2],[9]		$ 11,326	[1],[6]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4],[9]		7.25%	[5],[6],[7]	7.25%	[3],[4],[9]	7.25%	[5],[6],[7]
Principal		$ 8,065	[3],[4],[9]		$ 8,106	[5],[6],[7]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4],[9],[44]		7.25%	[5],[6],[7]	7.25%	[3],[4],[9],[44]	7.25%	[5],[6],[7]
Principal		$ 9,197	[3],[4],[9],[44]		$ 9,197	[5],[6],[7]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4],[9]		7.25%	[5],[6],[7]	7.25%	[3],[4],[9]	7.25%	[5],[6],[7]
Principal		$ 10,812	[3],[4],[9]		$ 10,827	[5],[6],[7]
Investment, Identifier [Axis]: LLFlex, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		9%	[3],[4]		9%	[5],[7]	9%	[3],[4]	9%	[5],[7]
Principal		$ 4,433	[3],[4]		$ 4,444	[5],[7]
Investment, Identifier [Axis]: Lightbox Holdings, L.P., Secured Debt
Schedule of Investments [Line Items]
Variable rate		5%	[2]		5%	[1]	5%	[2]	5%	[1]
Principal		$ 14,438	[2]		$ 14,475	[1]
Investment, Identifier [Axis]: Logix Acquisition Company, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.75%	[3],[4]		5.75%	[5],[7]	5.75%	[3],[4]	5.75%	[5],[7]
Principal		$ 19,662	[3],[4]		$ 19,662	[5],[7]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[2],[4],[9],[10]		6%	[1],[6],[7]	6%	[2],[4],[9],[10]	6%	[1],[6],[7]
Principal		$ 9,259	[2],[4],[9],[10]		$ 8,338	[1],[6],[7]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[2],[4],[9]		6%	[1],[6],[7]	6%	[2],[4],[9]	6%	[1],[6],[7]
Principal		$ 7,856	[2],[4],[9]		$ 7,876	[1],[6],[7]
Investment, Identifier [Axis]: MH Corbin Holding LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		6,040	[19]		6,156
Investment, Identifier [Axis]: MS Private Loan Fund I, LP, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 0	[11],[36],[45]		$ 0	[8],[38],[46]
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4]		7.25%	[5],[7],[47]	7.25%	[3],[4]	7.25%	[5],[7],[47]
Principal		$ 1,825	[3],[4]		$ 3,103	[5],[7],[47]
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4]		7.25%	[5],[7]	7.25%	[3],[4]	7.25%	[5],[7]
Principal		$ 15,245	[3],[4]		$ 15,324	[5],[7]
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		11%	[4]		11%	[7]	11%	[4]	11%	[7]	11%
Principal		$ 6,900	[4]		$ 6,275	[7]
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 26,079	[12]		26,079	[13]
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Preferred Equity
Schedule of Investments [Line Items]
Variable rate	[48]	8%					8%
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 0	[11]		0	[8]
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 23,802			$ 23,802
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[9],[11]		6.25%	[5],[6],[7],[8]	6.25%	[3],[4],[9],[11]	6.25%	[5],[6],[7],[8]
Principal		$ 0	[3],[4],[9],[11]		$ 0	[5],[6],[7],[8]
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[9]		6.25%	[5],[6],[7]	6.25%	[3],[4],[9]	6.25%	[5],[6],[7]
Principal		$ 25,722	[3],[4],[9]		$ 26,075	[5],[6],[7]
Investment, Identifier [Axis]: Mills Fleet Farm Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4]		6.25%	[5],[7]	6.25%	[3],[4]	6.25%	[5],[7]
Principal		$ 18,769	[3],[4]		$ 18,769	[5],[7]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[36],[37]		7%	[5],[7],[8],[38],[39]	7%	[3],[4],[36],[37]	7%	[5],[7],[8],[38],[39]
Principal		$ 1,930	[3],[4],[36],[37]		$ 0	[5],[7],[8],[38],[39]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[36],[37]		7%	[5],[7],[38],[39]	7%	[3],[4],[36],[37]	7%	[5],[7],[38],[39]
Principal		$ 10,107	[3],[4],[36],[37]		$ 10,107	[5],[7],[38],[39]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[36],[37]		7%	[5],[7],[38],[39]	7%	[3],[4],[36],[37]	7%	[5],[7],[38],[39]
Principal		$ 17,038	[3],[4],[36],[37]		$ 17,038	[5],[7],[38],[39]
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[11]		0	[8]
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 5,746			$ 5,746
Investment, Identifier [Axis]: NBG Acquisition Inc, Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.50%	[2],[4],[12]		5.50%	[1],[7]	5.50%	[2],[4],[12]	5.50%	[1],[7]
Principal		$ 3,849	[2],[4],[12]		$ 3,849	[1],[7]
Investment, Identifier [Axis]: NRP Jones, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 2,080			$ 2,080
Investment, Identifier [Axis]: NTM Acquisition Corp., Secured Debt
Schedule of Investments [Line Items]
Variable rate		7.25%	[2],[4],[9]		6.25%	[1],[7]	7.25%	[2],[4],[9]	6.25%	[1],[7]
Principal		$ 4,298	[2],[4],[9]		$ 4,358	[1],[7]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		8%	[3],[4],[9],[49]		8%	[5],[6],[7],[50]	8%	[3],[4],[9],[49]	8%	[5],[6],[7],[50]
Principal		$ 4,963	[3],[4],[9],[49]		$ 3,941	[5],[6],[7],[50]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		8%	[3],[4],[9]		8%	[5],[6],[7]	8%	[3],[4],[9]	8%	[5],[6],[7]
Principal		$ 39,642	[3],[4],[9]		$ 39,851	[5],[6],[7]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Principal		$ 6,838	[3]		$ 6,509	[5]
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC (NVS), Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7%					7%
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[7],[8]				7%				7%
Principal		$ 20,094			$ 0	[7],[8]
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		10,500			20,094
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Principal					10,500
Investment, Identifier [Axis]: NexRev LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[11]		0	[8]
Investment, Identifier [Axis]: NexRev LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 10,836			$ 11,465
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[11]		6.25%	[5],[7],[8]	6.25%	[3],[4],[11]	6.25%	[5],[7],[8]
Principal		$ 0	[3],[4],[11]		$ 0	[5],[7],[8]
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[11]		6.25%	[5],[7],[8]	6.25%	[3],[4],[11]	6.25%	[5],[7],[8]
Principal		$ 0	[3],[4],[11]		$ 0	[5],[7],[8]
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4]		6.25%	[5],[7]	6.25%	[3],[4]	6.25%	[5],[7]
Principal		$ 21,666	[3],[4]		$ 21,666	[5],[7]
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.50%	[4]		6.50%	[7]	6.50%	[4]	6.50%	[7]	6.50%
Principal		$ 4,400	[4]		$ 4,400	[7]
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		18,440			18,440
Investment, Identifier [Axis]: OMi Topco, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 15,000			$ 15,750
Investment, Identifier [Axis]: OVG Business Services, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4]		6.25%	[5],[7]	6.25%	[3],[4]	6.25%	[5],[7]
Principal		$ 13,860	[3],[4]		$ 13,930	[5],[7]
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Principal		964	[12]		964	[13]
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Principal		983	[12]		983	[13]
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Principal		2,116	[12]		2,116	[13]
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 4
Schedule of Investments [Line Items]
Principal		4,415	[12]		4,415	[13]
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Unsecured Debt
Schedule of Investments [Line Items]
Principal		$ 305	[12]		$ 305	[13]
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate											11%
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		11%			11%	[7],[8]	11%		11%	[7],[8]
Principal		$ 0	[4],[11]		$ 0	[7],[8]
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		11%			11%	[7]	11%		11%	[7]
Principal		$ 5,520	[4]		$ 5,600	[7]
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate											11%
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		11%	[4],[11]		11%	[7],[8]	11%	[4],[11]	11%	[7],[8]
Principal		$ 0	[4],[11]		$ 0	[7],[8]
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		11%	[4]		11%	[7]	11%	[4]	11%	[7]
Principal		$ 22,800	[4]		$ 23,600	[7]
Investment, Identifier [Axis]: Ospemifene Royalty Sub LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 4,474	[3],[12]		$ 4,489	[5],[13]
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7%	[4],[11]		7%	[7],[8]	7%	[4],[11]	7%	[7],[8]	7%
Principal		$ 0	[4],[11]		$ 0	[7],[8]
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7%	[4]		7%	[7]	7%	[4]	7%	[7]	7%
Principal		$ 21,655	[4]		$ 21,655	[7]
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.25%	[4],[36]		7.25%	[5],[6],[7],[8],[38]	6.25%	[4],[36]	7.25%	[5],[6],[7],[8],[38]
Principal		$ 1,431	[4],[36]		$ 0	[5],[6],[7],[8],[38]
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.25%	[4],[9],[36]		7.25%	[5],[6],[7],[38]	7.25%	[4],[9],[36]	7.25%	[5],[6],[7],[38]
Principal		$ 28,109	[4],[9],[36]		$ 28,265	[5],[6],[7],[38]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		5.75%	[3],[4],[9]		5.75%	[5],[6],[7]	5.75%	[3],[4],[9]	5.75%	[5],[6],[7]
Principal		$ 1,082	[3],[4],[9]		$ 541	[5],[6],[7]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		5.75%	[3],[4],[9]		5.75%	[5],[6],[7],[51]	5.75%	[3],[4],[9]	5.75%	[5],[6],[7],[51]
Principal		$ 3,237	[3],[4],[9]		$ 2,701	[5],[6],[7],[51]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		5.75%	[3],[4],[9]		5.75%	[5],[6],[7]	5.75%	[3],[4],[9]	5.75%	[5],[6],[7]
Principal		$ 18,739	[3],[4],[9]		$ 18,293	[5],[6],[7]
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		3,500			0	[8]
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		11,500			0	[8]
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 3
Schedule of Investments [Line Items]
Principal		27,681			28,681
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 5,897
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal	[8]				0
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal					$ 5,897
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[11]		6.25%	[5],[7],[8]	6.25%	[3],[4],[11]	6.25%	[5],[7],[8]
Principal		$ 0	[3],[4],[11]		$ 0	[5],[7],[8]
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4]		6.25%	[5],[7]	6.25%	[3],[4]	6.25%	[5],[7]
Principal		$ 29,363	[3],[4]		$ 29,475	[5],[7]
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.75%	[3],[4],[9]		6.75%	[5],[6],[7],[8]	6.75%	[3],[4],[9]	6.75%	[5],[6],[7],[8]
Principal		$ 383	[3],[4],[9]		$ 0	[5],[6],[7],[8]
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.75%	[3],[4],[9]		6.75%	[5],[6],[7]	6.75%	[3],[4],[9]	6.75%	[5],[6],[7]
Principal		$ 13,369	[3],[4],[9]		$ 13,369	[5],[6],[7]
Investment, Identifier [Axis]: RM Bidder, LLC, Warrants
Schedule of Investments [Line Items]
Strike price (in dollars per share) | $ / shares				$ 14.28	$ 14.28
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.75%	[3],[4],[9]		7.75%	[5],[6],[7],[52]	7.75%	[3],[4],[9]	7.75%	[5],[6],[7],[52]
Principal		$ 2,055	[3],[4],[9]		$ 1,361	[5],[6],[7],[52]
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.75%	[3],[4],[9]		7.75%	[5],[6],[7]	7.75%	[3],[4],[9]	7.75%	[5],[6],[7]
Principal		$ 15,364	[3],[4],[9]		$ 16,623	[5],[6],[7]
Investment, Identifier [Axis]: Research Now Group, Inc. and Survey Sampling International, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.50%	[2],[4]		5.50%	[1],[7]	5.50%	[2],[4]	5.50%	[1],[7]
Principal		$ 19,914	[2],[4]		$ 19,966	[1],[7]
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate											11%
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[11]		0	[7],[8]
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 35,460			35,685	[7]
Investment, Identifier [Axis]: Rocaceia, LLC (Quality Lease and Rental Holdings, LLC), Secured Debt
Schedule of Investments [Line Items]
Principal	[13],[20],[53]				$ 30,369
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[9],[11]		6.50%	[5],[6],[7]	6.50%	[3],[4],[9],[11]	6.50%	[5],[6],[7]
Principal		$ 0	[3],[4],[9],[11]		$ 311	[5],[6],[7]
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[9]		6.50%	[5],[6],[7]	6.50%	[3],[4],[9]	6.50%	[5],[6],[7]
Principal		$ 2,333	[3],[4],[9]		$ 2,333	[5],[6],[7]
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[9]		6.50%	[5],[6],[7]	6.50%	[3],[4],[9]	6.50%	[5],[6],[7]
Principal		$ 3,173	[3],[4],[9]		$ 3,173	[5],[6],[7]
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[9]		6.25%	[5],[6],[7]	6.25%	[3],[4],[9]	6.25%	[5],[6],[7]
Principal		$ 5,625	[3],[4],[9]		$ 5,625	[5],[6],[7]
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[9]		6.25%	[5],[6],[7]	6.25%	[3],[4],[9]	6.25%	[5],[6],[7]
Principal		$ 8,340	[3],[4],[9]		$ 8,340	[5],[6],[7]
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[11]		0	[8]
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 84,536			$ 89,786
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4]		6.25%	[5],[7]	6.25%	[3],[4]	6.25%	[5],[7]
Principal		$ 590	[3],[4]		$ 417	[5],[7]
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4]		6.25%	[5],[7]	6.25%	[3],[4]	6.25%	[5],[7]
Principal		$ 1,544	[3],[4]		$ 1,553	[5],[7]
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4]		6.25%	[5],[7]	6.25%	[3],[4]	6.25%	[5],[7]
Principal		$ 7,732	[3],[4]		$ 7,750	[5],[7]
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4],[9],[11]		7.50%	[5],[6],[7],[8]	7.50%	[3],[4],[9],[11]	7.50%	[5],[6],[7],[8]
Principal		$ 0	[3],[4],[9],[11]		$ 0	[5],[6],[7],[8]
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4],[9]		7.50%	[5],[6],[7]	7.50%	[3],[4],[9]	7.50%	[5],[6],[7]
Principal		$ 15,888	[3],[4],[9]		$ 15,928	[5],[6],[7]
Investment, Identifier [Axis]: Savers, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.50%	[2],[4],[9]		5.50%	[1],[6],[7]	5.50%	[2],[4],[9]	5.50%	[1],[6],[7]
Principal		$ 5,642	[2],[4],[9]		$ 11,286	[1],[6],[7]
Investment, Identifier [Axis]: Slick Innovations, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 13,600			$ 13,840
Investment, Identifier [Axis]: Sonic Systems International, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4]		7.50%	[5],[7]	7.50%	[3],[4]	7.50%	[5],[7]	7.50%
Principal		$ 15,769	[3],[4]		$ 15,769	[5],[7]
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		5.25%	[3],[4],[11]		5.75%	[5],[7],[8]	5.25%	[3],[4],[11]	5.75%	[5],[7],[8]
Principal		$ 0	[3],[4],[11]		$ 0	[5],[7],[8]
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		5.25%	[3],[4]		5.75%	[5],[7]	5.25%	[3],[4]	5.75%	[5],[7]
Principal		$ 41,151	[3],[4]		$ 41,255	[5],[7]
Investment, Identifier [Axis]: Staples Canada ULC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[36],[37],[54]		7%	[5],[7],[38],[39],[55]	7%	[3],[4],[36],[37],[54]	7%	[5],[7],[38],[39],[55]
Principal		$ 13,146	[3],[4],[36],[37],[54]		$ 13,740	[5],[7],[38],[39],[55]
Investment, Identifier [Axis]: Stellant Systems, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.50%	[2],[4],[9]		5.50%	[1],[6],[7]	5.50%	[2],[4],[9]	5.50%	[1],[6],[7]
Principal		$ 7,585	[2],[4],[9]		$ 7,623	[1],[6],[7]
Investment, Identifier [Axis]: Student Resource Center, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		8.50%	[3]		8.50%	[5]	8.50%	[3]	8.50%	[5]
Principal		$ 5,000	[3]		$ 5,000	[5]
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., Secured Debt
Schedule of Investments [Line Items]
Principal		$ 20,500			$ 21,500
Investment, Identifier [Axis]: Tacala Investment Corp., Secured Debt
Schedule of Investments [Line Items]
Variable rate		3.50%	[4],[26],[56]		3.50%	[7],[57],[58]	3.50%	[4],[26],[56]	3.50%	[7],[57],[58]
Principal		$ 1,974	[4],[26],[56]		$ 1,974	[7],[57],[58]
Investment, Identifier [Axis]: Team Public Choices, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		5%	[2],[4]		5%	[1],[7]	5%	[2],[4]	5%	[1],[7]
Principal		$ 14,926	[2],[4]		$ 14,964	[1],[7]
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		1,840			1,840
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		15,200			15,200
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[11]		120
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		9,321			9,521
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[11]		0	[8]
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 7,920			$ 7,920
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt
Schedule of Investments [Line Items]
Variable rate		8.40%	[2],[4],[9]		1.25%	[1],[6],[7]	8.40%	[2],[4],[9]	1.25%	[1],[6],[7]
Principal		$ 18,683	[2],[4],[9]		$ 18,352	[1],[6],[7]
Investment, Identifier [Axis]: USA DeBusk LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.75%	[3],[4]		5.75%	[5],[7]	5.75%	[3],[4]	5.75%	[5],[7]
Principal		$ 33,492	[3],[4]		$ 33,577	[5],[7]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Convertible Debt
Schedule of Investments [Line Items]
Principal		$ 2,494	[2]		$ 2,403	[1]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.50%	[2],[4],[9]		5.50%	[1],[6],[7]	7.50%	[2],[4],[9]	5.50%	[1],[6],[7]	5.50%
Principal		$ 407	[2],[4],[9]		$ 406	[1],[6],[7]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.50%	[2],[4],[9]		5.50%	[1],[6],[7]	7.50%	[2],[4],[9]	5.50%	[1],[6],[7]	5.50%
Principal		$ 1,821	[2],[4],[9]		$ 1,814	[1],[6],[7]
Investment, Identifier [Axis]: UserZoom Technologies, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate	[3],[4],[9]	7.50%					7.50%
Principal	[3],[4],[9]	$ 4,000
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[4],[11],[23]		6%	[7],[8],[24]	6%	[4],[11],[23]	6%	[7],[8],[24]	6%
Principal		$ 0	[4],[11],[23]		$ 0	[7],[8],[24]
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 30,400	[23]		$ 30,400	[24]
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		5.25%	[2],[4],[11]		5.25%	[1],[7],[8]	5.25%	[2],[4],[11]	5.25%	[1],[7],[8]
Principal		$ 0	[2],[4],[11]		$ 0	[1],[7],[8]
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[2],[4]		6%	[1],[7]	6%	[2],[4]	6%	[1],[7]
Principal		$ 17,640	[2],[4]		$ 17,685	[1],[7]
Investment, Identifier [Axis]: Vida Capital, Inc, Secured Debt
Schedule of Investments [Line Items]
Variable rate	[1]				6%				6%
Principal	[1]				$ 15,448
Investment, Identifier [Axis]: Vida Capital, Inc, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[2]	6%					6%
Principal	[2]	$ 15,101
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 2,100			16,734	[20]
Investment, Identifier [Axis]: Volusion, LLC, Unsecured Convertible Debt
Schedule of Investments [Line Items]
Principal					$ 409
Investment, Identifier [Axis]: Wahoo Fitness Acquisition L.L.C., Secured Debt
Schedule of Investments [Line Items]
Variable rate	[1],[6],[7]				5.75%				5.75%
Principal	[1],[6],[7]				$ 14,625
Investment, Identifier [Axis]: Wahoo Fitness Acquisition L.L.C., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[2],[4],[9]	5.25%					5.25%
Principal	[2],[4],[9]	$ 2,006
Investment, Identifier [Axis]: Wahoo Fitness Acquisition L.L.C., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate	[2],[4],[9],[12]	5.75%					5.75%
Principal	[2],[4],[9],[12]	$ 14,625
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[11]		7%	[5],[7],[8]	7%	[3],[4],[11]	7%	[5],[7],[8]
Principal		$ 0	[3],[4],[11]		$ 0	[5],[7],[8]
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4]		7%	[5],[7]	7%	[3],[4]	7%	[5],[7]
Principal		$ 4,208	[3],[4]		$ 4,235	[5],[7]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[59]		6%	[5],[7]	6.25%	[3],[4],[59]	6%	[5],[7]
Principal		$ 1,945	[3],[4],[59]		$ 371	[5],[7]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4]		6%	[5],[7]	6%	[3],[4]	6%	[5],[7]
Principal		$ 390	[3],[4]		$ 391	[5],[7]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4]		6%	[5],[7]	6.25%	[3],[4]	6%	[5],[7]
Principal		$ 28,884	[3],[4]		$ 28,957	[5],[7]
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[9],[11]		6%	[5],[6],[7],[8]	6%	[3],[4],[9],[11]	6%	[5],[6],[7],[8]
Principal		$ 0	[3],[4],[9],[11]		$ 0	[5],[6],[7],[8]
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[9]		6%	[5],[6],[7]	6%	[3],[4],[9]	6%	[5],[6],[7]
Principal		$ 10,767	[3],[4],[9]		$ 10,794	[5],[6],[7]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[11]		7%	[5],[7],[8]	7%	[3],[4],[11]	7%	[5],[7],[8]
Principal		$ 0	[3],[4],[11]		$ 0	[5],[7],[8]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[11]		7%	[5],[7],[8]	7%	[3],[4],[11]	7%	[5],[7],[8]
Principal		$ 0	[3],[4],[11]		$ 0	[5],[7],[8]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4]		7%	[5],[7]	7%	[3],[4]	7%	[5],[7]
Principal		$ 10,000	[3],[4]		$ 10,000	[5],[7]
Investment, Identifier [Axis]: World Micro Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 14,280			$ 14,280
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		5.25%	[3]		5.25%	[5],[8]	5.25%	[3]	5.25%	[5],[8]
Principal		$ 1,260	[3]		$ 0	[5],[8]
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		5.25%	[3]		5.25%	[5]	5.25%	[3]	5.25%	[5]
Principal		$ 24,239	[3]		$ 24,300	[5]
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		5.25%	[3]		5.25%	[5]	5.25%	[3]	5.25%	[5]
Principal		$ 38,118	[3]		$ 38,311	[5]
Investment, Identifier [Axis]: YS Garments, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		6%	[2],[4]		5.50%	[1],[7]	6%	[2],[4]	5.50%	[1],[7]
Principal		$ 12,471	[2],[4]		$ 12,659	[1],[7]
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		450			450
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		1,000			1,000
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Principal		$ 2,750			$ 2,750
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4],[9],[44]		7.25%	[5],[6],[7]	7.25%	[3],[4],[9],[44]	7.25%	[5],[6],[7]
Principal		$ 17,468	[3],[4],[9],[44]		$ 17,512	[5],[6],[7]
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4],[9],[44]		7.25%	[5],[6],[7],[58]	7.25%	[3],[4],[9],[44]	7.25%	[5],[6],[7],[58]
Principal		$ 4,378	[3],[4],[9],[44]		$ 4,389	[5],[6],[7],[58]
Forward foreign currency contract | Staples Canada ULC
Schedule of Investments [Line Items]
Principal		12,500			13,100		$ 16.2		$ 16.9
Foreign currency transaction gain (loss), unrealized		$ 500			$ 600
Minimum
Schedule of Investments [Line Items]
Variable rate		0.10%			0.10%		0.10%		0.10%
Maximum
Schedule of Investments [Line Items]
Variable rate		0.35%			0.35%		0.35%		0.35%
LIBOR or SOFR | Minimum
Schedule of Investments [Line Items]
Variable rate		0.50%			0.50%		0.50%		0.50%
LIBOR or SOFR | Maximum
Schedule of Investments [Line Items]
Variable rate		2%					2%
Floor rate					2%				2%
LIBOR or SOFR | Weighted Average
Schedule of Investments [Line Items]
Floor rate		1.08%			1.04%		1.08%		1.04%
LIBOR | Computer Data Source, LLC
Schedule of Investments [Line Items]
Variable rate		7.50%			8%		7.50%		8%
LIBOR | Invincible Boat Company, LLC.
Schedule of Investments [Line Items]
Variable rate		6.50%					6.50%
LIBOR | Watterson Brands, LLC
Schedule of Investments [Line Items]
Variable rate		6.25%					6.25%
LIBOR | Cadence Aerospace LLC
Schedule of Investments [Line Items]
Variable rate					6.50%				6.50%
LIBOR | Independent Pet Partners Intermediate Holdings, LLC
Schedule of Investments [Line Items]
Variable rate					6.50%				6.50%
LIBOR | Interface Security Systems, L.L.C
Schedule of Investments [Line Items]
Variable rate					10%				10%
LIBOR | Mako Steel, LP
Schedule of Investments [Line Items]
Variable rate					7.25%				7.25%
SOFR | Arrow International, Inc
Schedule of Investments [Line Items]
Variable rate					6%				6%
SOFR | Various Investment 1
Schedule of Investments [Line Items]
Variable rate		6%			7.25%		6%		7.25%
SOFR | Various Investments 2
Schedule of Investments [Line Items]
Variable rate		6.25%					6.25%
SOFR | Dalton US Inc.
Schedule of Investments [Line Items]
Variable rate		7.50%					7.50%
SOFR | GULF PACIFIC ACQUISITION, LLC
Schedule of Investments [Line Items]
Variable rate		6%					6%
SOFR | Various Investments 3
Schedule of Investments [Line Items]
Variable rate		7.25%					7.25%
SOFR | NWN Corporation
Schedule of Investments [Line Items]
Variable rate		8%			8%		8%		8%
SOFR | Bolder Panther Group, LLC
Schedule of Investments [Line Items]
Variable rate		8%			8%		8%		8%
SOFR | Channel Partners Intermediateco, LLC
Schedule of Investments [Line Items]
Variable rate					6.25%				6.25%
SOFR | IG Parent Corporation
Schedule of Investments [Line Items]
Variable rate					5.75%				5.75%
SOFR | Channel Partners Intermediateco, LLC
Schedule of Investments [Line Items]
Variable rate					6.25%				6.25%
SOFR | Paragon Healthcare, Inc.
Schedule of Investments [Line Items]
Variable rate					5.75%				5.75%
SOFR | RTIC Subsidiary Holdings, LLC
Schedule of Investments [Line Items]
Variable rate					7.75%				7.75%
Prime Rate | Arrow International, Inc
Schedule of Investments [Line Items]
Variable rate		5.10%					5.10%
Prime Rate | Independent Pet Partners Intermediate Holdings, LLC
Schedule of Investments [Line Items]
Variable rate					5.50%				5.50%
[1] Middle Market portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Middle Market portfolio investments. Middle Market portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Middle Market portfolio investments. Private Loan portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Private Loan portfolio investments. Private Loan portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Private Loan portfolio investments. Other Portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Other Portfolio investments. Other Portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Other Portfolio investments. Short-term portfolio investments. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of short-term portfolio investments. Short-term portfolio investments. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of short-term portfolio investments.

ORGANIZATION AND BASIS OF PRESE

ORGANIZATION AND BASIS OF PRESENTATION	3 Months Ended
	Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION AND BASIS OF PRESENTATION	ORGANIZATION AND BASIS OF PRESENTATION 1. Organization Main Street Capital Corporation (“MSCC”, or together with its consolidated subsidiaries, “Main Street” or the “Company”) is a principal investment firm primarily focused on providing customized debt and equity financing to lower middle market (“LMM”) companies and debt capital to middle market (“Middle Market”) companies. Main Street’s portfolio investments are typically made to support management buyouts, recapitalizations, growth financings, refinancings and acquisitions of companies that operate in a variety of industry sectors. Main Street seeks to partner with entrepreneurs, business owners and management teams and generally provides “one-stop” financing alternatives within its LMM investment strategy. Main Street invests primarily in secured debt investments, equity investments, warrants and other securities of LMM companies based in the United States and in secured debt investments of Middle Market companies generally headquartered in the United States. MSCC was formed in March 2007 to operate as an internally managed business development company (“BDC”) under the Investment Company Act of 1940, as amended (the “1940 Act”). Because MSCC is internally managed, all of the executive officers and other employees are employed by MSCC. Therefore, MSCC does not pay any external investment advisory fees, but instead directly incurs the operating costs associated with employing investment and portfolio management professionals. MSCC wholly owns several investment funds, including Main Street Mezzanine Fund, LP (“MSMF”) and Main Street Capital III, LP (“MSC III” and, together with MSMF, the “Funds”), and each of their general partners. The Funds are each licensed as a Small Business Investment Company (“SBIC”) by the United States Small Business Administration (“SBA”). MSC Adviser I, LLC (the “External Investment Manager”) was formed in November 2013 as a wholly-owned subsidiary of Main Street to provide investment management and other services to parties other than Main Street (“External Parties”) and receives fee income for such services. MSCC has been granted no-action relief by the Securities and Exchange Commission (“SEC”) to allow the External Investment Manager to register as a registered investment adviser under the Investment Advisers Act of 1940, as amended. Since the External Investment Manager conducts all of its investment management activities for External Parties, it is accounted for as a portfolio investment of Main Street and is not included as a consolidated subsidiary in Main Street’s consolidated financial statements. MSCC has elected to be treated for U.S. federal income tax purposes as a regulated investment company (“RIC”) under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Code”). As a result, MSCC generally does not pay corporate-level U.S. federal income taxes on any net ordinary taxable income or capital gains that it distributes to its stockholders. Main Street has certain direct and indirect wholly-owned subsidiaries that have elected to be taxable entities (the “Taxable Subsidiaries”). The primary purpose of the Taxable Subsidiaries is to permit MSCC to hold equity investments in portfolio companies which are “pass-through” entities for tax purposes. MSCC also has certain direct and indirect wholly-owned subsidiaries formed for financing purposes (the “Structured Subsidiaries”). Unless otherwise noted or the context otherwise indicates, the terms “we,” “us,” “our,” the “Company” and “Main Street” refer to MSCC and its consolidated subsidiaries, which include the Funds, the Taxable Subsidiaries and the Structured Subsidiaries. 2. Basis of Presentation Main Street’s consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”). The Company is an investment company following accounting and reporting guidance in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 946, Financial Services—Investment Companies (“ASC 946”). For each of the periods presented herein, Main Street’s consolidated financial statements include the accounts of MSCC and its consolidated subsidiaries. The Investment Portfolio, as used herein, refers to all of Main Street’s investments in LMM portfolio companies, investments in Private Loan portfolio companies, investments in Middle Market portfolio companies, Other Portfolio investments and the investment in the External Investment Manager (see Note C — Fair Value Hierarchy for Investments — Portfolio Composition — Investment Portfolio Composition for additional discussion of Main Street’s Investment Portfolio and definitions for the defined terms Private Loan and Other Portfolio). Main Street’s results of operations for the three months ended March 31, 2023 and 2022, cash flows for the three months ended March 31, 2023 and 2022, and financial position as of March 31, 2023 and December 31, 2022, are presented on a consolidated basis. The effects of all intercompany transactions between MSCC and its consolidated subsidiaries have been eliminated in consolidation. The accompanying unaudited consolidated financial statements of Main Street are presented in conformity with U.S. GAAP for interim financial information and pursuant to the requirements for reporting on Form 10-Q and Articles 6, 10 and 12 of Regulation S-X. Accordingly, certain disclosures accompanying annual consolidated financial statements prepared in accordance with U.S. GAAP are omitted. The unaudited consolidated financial statements and notes should be read in conjunction with the audited financial statements and notes thereto for the year ended December 31, 2022. In the opinion of management, the unaudited consolidated financial results included herein contain all adjustments, consisting solely of normal recurring accruals, considered necessary for the fair presentation of financial statements for the interim periods included herein. The results of operations for the three months ended March 31, 2023 are not necessarily indicative of the operating results to be expected for the full year. Financial statements prepared on a U.S. GAAP basis require management to make estimates and assumptions that affect the amounts and disclosures reported in the consolidated financial statements and accompanying notes. Such estimates and assumptions could change in the future as more information becomes known, which could impact the amounts reported and disclosed herein. Principles of Consolidation Under ASC 946, Main Street is precluded from consolidating other entities in which Main Street has equity investments, including those in which it has a controlling interest, unless the other entity is another investment company. An exception to this general principle in ASC 946 occurs if Main Street holds a controlling interest in an operating company that provides all or substantially all of its services directly to Main Street or to its portfolio companies. Accordingly, as noted above, MSCC’s consolidated financial statements include the financial position and operating results for the Funds, the Taxable Subsidiaries and the Structured Subsidiaries. Main Street has determined that none of its portfolio investments qualify for this exception, including the investment in the External Investment Manager. Therefore, Main Street’s Investment Portfolio is carried on the Consolidated Balance Sheets at fair value, as discussed further in Note B.1. — Summary of Significant Accounting Policies — Valuation of the Investment Portfolio , with any adjustments to fair value recognized as “Net Unrealized Appreciation (Depreciation)” until the investment is realized, usually upon exit, resulting in any gain or loss being recognized as a “Net Realized Gain (Loss),” in both cases on the Consolidated Statements of Operations. Portfolio Investment Classification Main Street classifies its Investment Portfolio in accordance with the requirements of the 1940 Act. Under the 1940 Act, (a) “Control Investments” are defined as investments in which Main Street owns more than 25% of the voting securities or has rights to maintain greater than 50% of the board representation, (b) “Affiliate Investments” are defined as investments in which Main Street owns between 5% and 25% (inclusive) of the voting securities and does not have rights to maintain greater than 50% of the board representation and (c) “Non-Control/Non-Affiliate Investments” are defined as investments that are neither Control Investments nor Affiliate Investments. For purposes of determining the classification of its Investment Portfolio, Main Street has excluded consideration of any voting securities or board appointment rights held by third-party investment funds advised by the External Investment Manager.

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	3 Months Ended
	Mar. 31, 2023
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES 1. Valuation of the Investment Portfolio Main Street accounts for its Investment Portfolio at fair value. As a result, Main Street follows the provisions of ASC 820, Fair Value Measurements and Disclosures (“ASC 820”). ASC 820 defines fair value, establishes a framework for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value and enhances disclosure requirements for fair value measurements. ASC 820 requires Main Street to assume that the portfolio investment is to be sold in the principal market to independent market participants, which may be a hypothetical market. Market participants are defined as buyers and sellers in the principal market that are independent, knowledgeable and willing and able to transact. Main Street’s portfolio strategy calls for it to invest primarily in illiquid debt and equity securities issued by privately held, LMM companies and debt securities issued by Middle Market companies that are generally larger in size than the LMM companies and that can be more liquid than the debt securities issued by LMM companies. Main Street categorizes some of its investments in LMM companies and Middle Market companies as Private Loan portfolio investments, which are primarily debt securities in privately held companies that have primarily been originated directly by Main Street or, to a lesser extent, through its strategic relationships with other investment funds on a collaborative basis through investments that are often referred to in the debt markets as “club deals” because of the small lender group size. In both cases, our Private Loan investments are typically made to support a company owned by or in the process of being acquired by a private equity sponsor. Private Loan investments are made in companies that are consistent with the size of companies Main Street invests in through its LMM portfolio and Middle Market portfolio. Main Street’s portfolio also includes Other Portfolio investments which primarily consist of investments that are not consistent with the typical profiles for its LMM, Private Loan or Middle Market portfolio investments, including investments which may be managed by third parties. Main Street’s portfolio may also include short-term portfolio investments that are atypical of Main Street’s LMM, Private Loan and Middle Market portfolio investments in that they are intended to be a short-term deployment of capital and are more liquid than investments within the other portfolios. Main Street’s portfolio investments may be subject to restrictions on resale. LMM investments and Other Portfolio investments generally have no established trading market, while Private Loan investments may include investments which have no established market or have established markets that are not active. Middle Market and short-term portfolio investments generally have established markets that are not active. Main Street determines in good faith the fair value of its Investment Portfolio pursuant to a valuation policy in accordance with ASC 820, with such valuation process approved by its Board of Directors and in accordance with the 1940 Act. Main Street’s valuation policies and processes are intended to provide a consistent basis for determining the fair value of Main Street’s Investment Portfolio. For LMM portfolio investments, Main Street generally reviews external events, including private mergers, sales and acquisitions involving comparable companies, and includes these events in the valuation process by using an enterprise value waterfall methodology (“Waterfall”) for its LMM equity investments and an income approach using a yield-to-maturity model (“Yield-to-Maturity”) valuation method for its LMM debt investments. For Private Loan and Middle Market portfolio investments in debt securities for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value the investment in a current hypothetical sale using the Yield-to-Maturity valuation method. For Middle Market and short-term portfolio investments in debt securities for which it has determined that third-party quotes or other independent prices are available, Main Street primarily uses quoted prices in the valuation process. Main Street determines the appropriateness of the use of third-party broker quotes, if any, in determining fair value based on its understanding of the level of actual transactions used by the broker to develop the quote and whether the quote was an indicative price or binding offer, the depth and consistency of broker quotes and the correlation of changes in broker quotes with underlying performance of the portfolio company and other market indices. For its Other Portfolio equity investments, Main Street generally calculates the fair value of the investment primarily based on the net asset value (“NAV”) of the fund and adjusts the fair value for other factors deemed relevant that would affect the fair value of the investment. All of the valuation approaches for Main Street’s portfolio investments estimate the value of the investment as if Main Street were to sell, or exit, the investment as of the measurement date. These valuation approaches consider the value associated with Main Street’s ability to control the capital structure of the portfolio company, as well as the timing of a potential exit. For valuation purposes, “control” portfolio investments are composed of debt and equity securities in companies for which Main Street has a controlling interest in the equity ownership of the portfolio company or the ability to nominate a majority of the portfolio company’s board of directors. For valuation purposes, “non-control” portfolio investments are generally composed of debt and equity securities in companies for which Main Street does not have a controlling interest in the equity ownership of the portfolio company or the ability to nominate a majority of the portfolio company’s board of directors. Under the Waterfall valuation method, Main Street estimates the enterprise value of a portfolio company using a combination of market and income approaches or other appropriate valuation methods, such as considering recent transactions in the equity securities of the portfolio company or third-party valuations of the portfolio company, and then performs a Waterfall calculation by allocating the enterprise value over the portfolio company’s securities in order of their preference relative to one another. The enterprise value is the fair value at which an enterprise could be sold in a transaction between two willing parties, other than through a forced or liquidation sale. Typically, privately held companies are bought and sold based on multiples of earnings before interest, taxes, depreciation and amortization (“EBITDA”), cash flows, net income, revenues, or in limited cases, book value. There is no single methodology for estimating enterprise value. For any one portfolio company, enterprise value is generally described as a range of values from which a single estimate of enterprise value is derived. In estimating the enterprise value of a portfolio company, Main Street analyzes various factors including the portfolio company’s historical and projected financial results. Due to SEC deadlines for Main Street’s quarterly and annual financial reporting, the operating results of a portfolio company used in the current period valuation are generally the results from the period ended three months prior to such valuation date and may include unaudited, projected, budgeted or pro forma financial information and may require adjustments for non-recurring items or to normalize the operating results that may require significant judgment in determining. In addition, projecting future financial results requires significant judgment regarding future growth assumptions. In evaluating the operating results, Main Street also analyzes the impact of exposure to litigation, loss of customers or other contingencies. After determining the appropriate enterprise value, Main Street allocates the enterprise value to investments in order of the legal priority of the various components of the portfolio company’s capital structure. In applying the Waterfall valuation method, Main Street assumes the loans are paid-off at the principal amount in a change in control transaction and are not assumed by the buyer, which Main Street believes is consistent with its past transaction history and standard industry practices. Under the Yield-to-Maturity valuation method, Main Street also uses the income approach to determine the fair value of debt securities based on projections of the discounted future free cash flows that the debt security will likely generate, including analyzing the discounted cash flows of interest and principal amounts for the debt security, as set forth in the associated loan agreements, as well as the financial position and credit risk of the portfolio company. Main Street’s estimate of the expected repayment date of its debt securities is generally the maturity date of the instrument, as Main Street generally intends to hold its loans and debt securities to maturity. The Yield-to-Maturity analysis also considers changes in leverage levels, credit quality, portfolio company performance, changes in market-based interest rates and other factors. Main Street will generally use the value determined by the Yield-to-Maturity analysis as the fair value for that security; however, because of Main Street’s general intent to hold its loans to maturity, the fair value will not exceed the principal amount of the debt security valued using the Yield-to-Maturity valuation method. A change in the assumptions that Main Street uses to estimate the fair value of its debt securities using the Yield-to-Maturity valuation method could have a material impact on the determination of fair value. If there is deterioration in credit quality or if a debt security is in workout status, Main Street may consider other factors in determining the fair value of the debt security, including the value attributable to the debt security from the enterprise value of the portfolio company or the proceeds that would most likely be received in a liquidation analysis. Under the NAV valuation method, for an investment in an investment fund that does not have a readily determinable fair value, Main Street measures the fair value of the investment predominately based on the NAV of the investment fund as of the measurement date and adjusts the investment’s fair value for factors known to Main Street that would affect that fund’s NAV, including, but not limited to, fair values for individual investments held by the fund if Main Street holds the same investment or for a publicly traded investment. In addition, in determining the fair value of the investment, Main Street considers whether adjustments to the NAV are necessary in certain circumstances, based on the analysis of any restrictions on redemption of Main Street’s investment as of the measurement date, recent actual sales or redemptions of interests in the investment fund, and expected future cash flows available to equity holders, including the rate of return on those cash flows compared to an implied market return on equity required by market participants, or other uncertainties surrounding Main Street’s ability to realize the full NAV of its interests in the investment fund. Pursuant to its internal valuation process and the requirements under the 1940 Act, Main Street performs valuation procedures on each of its portfolio investments quarterly. In addition to its internal valuation process, in arriving at estimates of fair value for its investments in its LMM portfolio companies, Main Street, among other things, consults with a nationally recognized independent financial advisory services firm (the “Financial Advisory Firm”). The Financial Advisory Firm analyzes and provides observations, recommendations and an assurance certification regarding the Company’s determinations of the fair value of its LMM portfolio company investments. The Financial Advisory Firm is generally consulted relative to Main Street’s investments in each LMM portfolio company at least once every calendar year, and for Main Street’s investments in new LMM portfolio companies, at least once in the twelve-month period subsequent to the initial investment. In certain instances, Main Street may determine that it is not cost-effective, and as a result is not in its stockholders’ best interest, to consult with the Financial Advisory Firm on its investments in one or more LMM portfolio companies. Such instances include, but are not limited to, situations where the fair value of Main Street’s investment in a LMM portfolio company is determined to be insignificant relative to the total Investment Portfolio. Main Street consulted with and received an assurance certification from the Financial Advisory Firm in arriving at Main Street’s determination of fair value on its investments in a total of 19 LMM portfolio companies for the three months ended March 31, 2023, representing 30% of the total LMM portfolio at fair value as of March 31, 2023, and on a total of 19 LMM portfolio companies for the three months ended March 31, 2022, representing 30% of the total LMM portfolio at fair value as of March 31, 2022. Excluding its investments in LMM portfolio companies that, as of March 31, 2023 and 2022, as applicable, had not been in the Investment Portfolio for at least twelve months subsequent to the initial investment or whose primary purpose is to own real estate for which a third-party appraisal is obtained on at least an annual basis, the percentage of the LMM portfolio reviewed and certified by the Financial Advisory Firm for the three months ended March 31, 2023 and 2022 was 32% and 36% of the total LMM portfolio at fair value, respectively. For valuation purposes, all of Main Street’s Private Loan portfolio investments are non-control investments. For Private Loan portfolio investments for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value such Private Loan debt investments in a current hypothetical sale using the Yield-to-Maturity valuation method and such Private Loan equity investments in a current hypothetical sale using the Waterfall valuation method. In addition to its internal valuation process, in arriving at estimates of fair value for its investments in its Private Loan portfolio companies, Main Street, among other things, consults with the Financial Advisory Firm. The Financial Advisory Firm analyzes and provides observations and recommendations and an assurance certification regarding Main Street’s determinations of the fair value of its Private Loan portfolio company investments. The Financial Advisory Firm is generally consulted relative to Main Street’s investments in each Private Loan portfolio company at least once every calendar year, and for Main Street’s investments in new Private Loan portfolio companies, at least once in the twelve-month period subsequent to the initial investment. In certain instances, Main Street may determine that it is not cost-effective, and as a result is not in its stockholders’ best interest, to consult with the Financial Advisory Firm on its investments in one or more Private Loan portfolio companies. Such instances include, but are not limited to, situations where the fair value of Main Street’s investment in a Private Loan portfolio company is determined to be insignificant relative to the total Investment Portfolio. Main Street consulted with and received an assurance certification from the Financial Advisory Firm in arriving at its determination of fair value on its investments in a total of 19 Private Loan portfolio companies for the three months ended March 31, 2023, representing 25% of the total Private Loan portfolio at fair value as of March 31, 2023, and on a total of 18 Private Loan portfolio companies for the three months ended March 31, 2022, representing 26% of the total Private Loan portfolio at fair value as of March 31, 2022. Excluding its investments in Private Loan portfolio companies that, as of March 31, 2023 and 2022, as applicable, had not been in the Investment Portfolio for at least twelve months subsequent to the initial investment and its investments in Private Loan portfolio companies that were not reviewed because the investment is valued based upon third-party quotes or other independent pricing, the percentage of the Private Loan portfolio reviewed and certified by the Financial Advisory Firm for the three months ended March 31, 2023 and 2022 was 28% and 42% of the total Private Loan portfolio at fair value, respectively. For valuation purposes, all of Main Street’s Middle Market portfolio investments are non-control investments. To the extent sufficient observable inputs are available to determine fair value, Main Street uses observable inputs to determine the fair value of these investments through obtaining third-party quotes or other independent pricing. For Middle Market portfolio investments for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value such Middle Market debt investments in a current hypothetical sale using the Yield-to-Maturity valuation method and such Middle Market equity investments in a current hypothetical sale using the Waterfall valuation method. Main Street generally consults on a limited basis with the Financial Advisory Firm in connection with determining the fair value of its Middle Market portfolio investments due to the nature of these investments. The vast majority (90% and 89% as of March 31, 2023 and December 31, 2022, respectively) of the Middle Market portfolio investments (i) are valued using third-party quotes or other independent pricing services, (ii) Main Street has consulted with and received an assurance certification from the Financial Advisory Firm within the last twelve months or (iii) are new investments that have not been in the Investment Portfolio for at least twelve months subsequent to the initial investment. For valuation purposes, all of Main Street’s short-term portfolio investments are non-control investments. To the extent sufficient observable inputs are available to determine fair value, Main Street uses observable inputs to determine the fair value of these investments through obtaining third-party quotes or other independent pricing. Because all of the short-term portfolio investments are typically valued using third-party quotes or other independent pricing services, Main Street generally does not consult with any financial advisory services firms in connection with determining the fair value of its short-term portfolio investments. For valuation purposes, all of Main Street’s Other Portfolio investments are non-control investments. Main Street’s Other Portfolio investments comprised 2.8% of Main Street’s Investment Portfolio at fair value as of both March 31, 2023 and December 31, 2022, respectively. Similar to the LMM investment portfolio, market quotations for Other Portfolio equity investments are generally not readily available. For its Other Portfolio equity investments, Main Street generally determines the fair value of these investments using the NAV valuation method. For valuation purposes, Main Street’s investment in the External Investment Manager is a control investment. Market quotations are not readily available for this investment, and as a result, Main Street determines the fair value of the External Investment Manager using the Waterfall valuation method under the market approach. In estimating the enterprise value, Main Street analyzes various factors, including the entity’s historical and projected financial results, as well as its size, marketability and performance relative to the population of market comparables. This valuation approach estimates the value of the investment as if Main Street were to sell, or exit, the investment. In addition, Main Street considers its ability to control the capital structure of the company, as well as the timing of a potential exit, in connection with determining the fair value of the External Investment Manager. Main Street consults with and receives an assurance certification from the Financial Advisory Firm in arriving at its determination of fair value for its investment in the External Investment Adviser on a quarterly rotation basis similar to its practice for other investment portfolio assets without third party quotes or other independent pricing. Due to the inherent uncertainty in the valuation process, Main Street’s determination of fair value for its Investment Portfolio may differ materially from the values that would have been determined had a ready market for the securities existed. In addition, changes in the market environment, portfolio company performance and other events that may occur over the lives of the investments may cause the gains or losses ultimately realized on these investments to be materially different than the valuations currently assigned. Main Street determines the fair value of each individual investment and records changes in fair value as unrealized appreciation or depreciation. Main Street uses an internally developed portfolio investment rating system in connection with its investment oversight, portfolio management and analysis and investment valuation procedures for its LMM, Private Loan and Middle Market portfolio companies. This system takes into account both quantitative and qualitative factors of each LMM, Private Loan and Middle Market portfolio company. In December 2020, the SEC adopted Rule 2a-5 under the 1940 Act, which permits a BDC’s board of directors to designate its executive officers or investment adviser as a valuation designee to determine the fair value for its investment portfolio, subject to the active oversight of the board. Main Street’s Board of Directors has approved policies and procedures pursuant to Rule 2a-5 (the “Valuation Procedures”) and has designated a group of its executive officers to serve as the Board of Directors’ valuation designee. Main Street believes its Investment Portfolio as of March 31, 2023 and December 31, 2022 approximates fair value as of those dates based on the markets in which it operates and other conditions in existence on those reporting dates. 2. Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. Actual results may differ from these estimates under different conditions or assumptions. Additionally, as explained in Note B.1. — Summary of Significant Accounting Policies — Valuation of the Investment Portfolio , the consolidated financial statements include investments in the Investment Portfolio whose values have been estimated by Main Street, pursuant to valuation policies and procedures approved and overseen by Main Street’s Board of Directors, in the absence of readily ascertainable market values. Because of the inherent uncertainty of the Investment Portfolio valuations, those estimated values may differ materially from the values that would have been determined had a ready market for the securities existed. Macroeconomic factors, including the COVID-19 pandemic, risk of recession, inflation, supply chain constraints or disruptions, geopolitical disruptions and rising interest rates, and the related effect on the U.S. and global economies, have impacted, and may continue to impact, the businesses and operating results of certain of Main Street’s portfolio companies, as well as market interest rate spreads. As a result of these and other current effects of macroeconomic factors, as well as the uncertainty regarding the extent and duration of their impact, the valuation of Main Street’s Investment Portfolio has and may continue to experience increased volatility. 3. Cash and Cash Equivalents Cash and cash equivalents consist of cash and highly liquid investments with an original maturity of three months or less at the date of purchase. Cash and cash equivalents are carried at cost, which approximates fair value. At March 31, 2023, cash balances totaling $35.2 million exceeded Federal Deposit Insurance Corporation insurance protection levels, subjecting the Company to risk related to the uninsured balance. All of the Company’s cash deposits are held at large established high credit quality financial institutions, and management believes that the risk of loss associated with any uninsured balances is remote. 4. Interest, Dividend and Fee Income Main Street records interest and dividend income on the accrual basis to the extent amounts are expected to be collected. Dividend income is recorded when dividends are declared by the portfolio company or at such other time that an obligation exists for the portfolio company to make a distribution. Main Street evaluates accrued interest and dividend income periodically for collectability. When a loan or debt security becomes 90 days or more past due, and if Main Street otherwise does not expect the debtor to be able to service its debt obligation, Main Street will generally place the loan or debt security on non-accrual status and cease recognizing interest income on that loan or debt security until the borrower has demonstrated the ability and intent to pay contractual amounts due. If a loan or debt security’s status significantly improves regarding the debtor’s ability to service the debt obligation, or if a loan or debt security is sold or written off, Main Street removes it from non-accrual status. As of March 31, 2023, Main Street’s total Investment Portfolio had 13 investments on non-accrual status, which comprised 0.6% of its fair value and 3.2% of its cost. As of December 31, 2022, Main Street’s total Investment Portfolio had 12 investments on non-accrual status, which comprised 0.6% of its fair value and 3.7% of its cost. Main Street holds certain debt and preferred equity instruments in its Investment Portfolio that contain payment-in-kind (“PIK”) interest and cumulative dividend provisions. The PIK interest, computed at the contractual rate specified in each debt agreement, is periodically added to the principal balance of the debt and is recorded as interest income. Thus, the actual collection of this interest may be deferred until the time of debt principal repayment. Cumulative dividends are recorded as dividend income, and any dividends in arrears are added to the balance of the preferred equity investment. The actual collection of these dividends in arrears may be deferred until such time as the preferred equity is redeemed or sold. To maintain RIC tax treatment (as discussed in Note B.9. — Summary of Significant Accounting Policies — Income Taxes below), these non-cash sources of income may need to be paid out to stockholders in the form of distributions, even though Main Street may not have collected the PIK interest and cumulative dividends in cash. Main Street stops accruing PIK interest and cumulative dividends and writes off any accrued and uncollected interest and dividends in arrears when it determines that such PIK interest and dividends in arrears are no longer collectible. For the three months ended March 31, 2023 and 2022, (i) 2.4% and 1.2%, respectively, of Main Street’s total investment income was attributable to PIK interest income not paid currently in cash and (ii) 0.3% and 1.1%, respectively, of Main Street’s total investment income was attributable to cumulative dividend income not paid currently in cash. Main Street may periodically provide services, including structuring and advisory services, to its portfolio companies or other third parties. For services that are separately identifiable and evidence exists to substantiate fair value, fee income is recognized as earned, which is generally when the investment or other applicable transaction closes. Fees received in connection with debt financing transactions for services that do not meet these criteria are treated as debt origination fees and are generally deferred and accreted into income over the life of the financing. A presentation of total investment income Main Street received from its Investment Portfolio in each of the periods presented is as follows: Three Months Ended 2023 2022 (dollars in thousands) Interest, fee and dividend income: Interest income $ 93,392 $ 59,441 Dividend income 24,222 16,622 Fee income 2,640 3,332 Total interest, fee and dividend income $ 120,254 $ 79,395 5. Deferred Financing Costs Deferred financing costs include commitment fees and other direct costs related to Main Street’s multi-year revolving credit facility (the “Corporate Facility”) and special purpose vehicle revolving credit facility (the “SPV Facility” and, together with the Corporate Facility, the “Credit Facilities”) and its unsecured notes, as well as the commitment fees and leverage fees (3.4% of the total commitment and draw amounts, as applicable) on the SBIC debentures. See further discussion of Main Street’s debt in Note E — Debt . Deferred financing costs in connection with the Credit Facilities are capitalized as an asset. Deferred financing costs in connection with all other debt arrangements are a direct deduction from the principal amount outstanding. 6. Equity Offering Costs The Company’s offering costs are charged against the proceeds from equity offerings when the proceeds are received. 7. Unearned Income—Debt Origination Fees and Original Issue Discount and Discounts / Premiums to Par Value Main Street capitalizes debt origination fees received in connection with financings and reflects such fees as unearned income netted against the applicable debt investments. The unearned income from the fees is accreted into income over the life of the financing. In connection with its portfolio debt investments, Main Street sometimes receives nominal cost warrants or warrants with an exercise price below the fair value of the underlying equity (together, “nominal cost equity”) that are valued as part of the negotiation process with the particular portfolio company. When Main Street receives nominal cost equity, Main Street allocates its cost basis in its investment between its debt security and its nominal cost equity at the time of origination based on amounts negotiated with the particular portfolio company. The allocated amounts are based upon the fair value of the nominal cost equity, which is then used to determine the allocation of cost to the debt security. Any discount recorded on a debt investment resulting from this allocation is reflected as unearned income, which is netted against the applicable debt investment, and accreted into interest income over the life of the debt investment. The actual collection of this interest is deferred until the time of debt principal repayment. Main Street may also purchase debt securities at a discount or at a premium to the par value of the debt security. In the case of a purchase at a discount, Main Street records the investment at the par value of the debt security net of the discount, and the discount is accreted into interest income over the life of the debt investment. In the case of a purchase at a premium, Main Street records the investment at the par value of the debt security plus the premium, and the premium is amortized as a reduction to interest income over the life of the debt investment. To maintain RIC tax treatment (as discussed in Note B.9. — Summary of Significant Accounting Policies — Income Taxes below), these non-cash sources of income may need to be paid out to stockholders in the form of distributions, even though Main Street may not have collected the interest income. For the three months ended March 31, 2023 and 2022, 1.8% and 2.0%, respectively, of Main Street’s total investment income was attributable to interest

FAIR VALUE HIERARCHY FOR INVEST

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION	3 Months Ended
	Mar. 31, 2023
Fair Value Disclosures [Abstract]
FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION	FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION ASC 820 defines fair value, establishes a framework for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value, and enhances disclosure requirements for fair value measurements. Main Street accounts for its investments at fair value. Fair Value Hierarchy In accordance with ASC 820, Main Street has categorized its investments based on the priority of the inputs to the valuation technique into a three-level fair value hierarchy. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical investments (Level 1) and the lowest priority to unobservable inputs (Level 3). Investments recorded on Main Street’s Consolidated Balance Sheets are categorized based on the inputs to the valuation techniques as follows: Level 1—Investments whose values are based on unadjusted quoted prices for identical assets in an active market that Main Street has the ability to access (examples include investments in active exchange-traded equity securities and investments in most U.S. government and agency securities). Level 2—Investments whose values are based on quoted prices in markets that are not active or model inputs that are observable either directly or indirectly for substantially the full term of the investment. Level 2 inputs include the following: • Quoted prices for similar assets in active markets (for example, investments in restricted stock); • Quoted prices for identical or similar assets in non-active markets (for example, investments in thinly traded public companies); • Pricing models whose inputs are observable for substantially the full term of the investment (for example, market interest rate indices); and • Pricing models whose inputs are derived principally from, or corroborated by, observable market data through correlation or other means for substantially the full term of the investment. Level 3—Investments whose values are based on prices or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement (for example, investments in illiquid securities issued by privately held companies). These inputs reflect management’s own assumptions about the assumptions a market participant would use in pricing the investment. As required by ASC 820, when the inputs used to measure fair value fall within different levels of the hierarchy, the level within which the fair value measurement is categorized is based on the lowest level input that is significant to the fair value measurement in its entirety. For example, a Level 3 fair value measurement may include inputs that are observable (Levels 1 and 2) and unobservable (Level 3). Therefore, unrealized appreciation and depreciation related to such investments categorized within the Level 3 tables below may include changes in fair value that are attributable to both observable inputs (Levels 1 and 2) and unobservable inputs (Level 3). As of March 31, 2023 and December 31, 2022, all of Main Street’s LMM portfolio investments consisted of illiquid securities issued by privately held companies and the fair value determination for these investments primarily consisted of unobservable inputs. As a result, all of Main Street’s LMM portfolio investments were categorized as Level 3 as of March 31, 2023 and December 31, 2022. As of March 31, 2023 and December 31, 2022, Main Street’s Private Loan portfolio investments primarily consisted of investments in interest-bearing secured debt investments. The fair value determination for these investments consisted of a combination of observable inputs in non-active markets for which sufficient observable inputs were not available to determine the fair value of these investments and unobservable inputs. As a result, all of Main Street’s Private Loan portfolio investments were categorized as Level 3 as of March 31, 2023 and December 31, 2022. As of March 31, 2023 and December 31, 2022, Main Street’s Middle Market portfolio investments consisted primarily of investments in secured and unsecured debt investments and independently rated debt investments. The fair value determination for these investments consisted of a combination of observable inputs in non-active markets for which sufficient observable inputs were not available to determine the fair value of these investments and unobservable inputs. As a result, all of Main Street’s Middle Market portfolio investments were categorized as Level 3 as of March 31, 2023 and December 31, 2022. As of March 31, 2023 and December 31, 2022, Main Street’s Other Portfolio investments consisted of illiquid securities issued by privately held companies and the fair value determination for these investments primarily consisted of unobservable inputs. As a result, all of Main Street’s Other Portfolio investments were categorized as Level 3 as of March 31, 2023 and December 31, 2022. As of March 31, 2023 and December 31, 2022, Main Street held one short-term portfolio investment, which was a secured debt investment. The fair value determination for this investment consisted of available observable inputs in non-active markets sufficient to determine the fair value of the investment. As a result, Main Street’s short-term portfolio investment was categorized as Level 2 as of March 31, 2023 and December 31, 2022. The fair value determination of each portfolio investment categorized as Level 3 required one or more of the following unobservable inputs: • Financial information obtained from each portfolio company, including unaudited statements of operations and balance sheets for the most recent period available as compared to budgeted numbers; • Current and projected financial condition of the portfolio company; • Current and projected ability of the portfolio company to service its debt obligations; • Type and amount of collateral, if any, underlying the investment; • Current financial ratios (e.g., fixed charge coverage ratio, interest coverage ratio and net debt/EBITDA ratio) applicable to the investment; • Current liquidity of the investment and related financial ratios (e.g., current ratio and quick ratio); • Pending debt or capital restructuring of the portfolio company; • Projected operating results of the portfolio company; • Current information regarding any offers to purchase the investment; • Current ability of the portfolio company to raise any additional financing as needed; • Changes in the economic environment which may have a material impact on the operating results of the portfolio company; • Internal occurrences that may have an impact (both positive and negative) on the operating performance of the portfolio company; • Qualitative assessment of key management; • Contractual rights, obligations or restrictions associated with the investment; and • Other factors deemed relevant. The use of significant unobservable inputs creates uncertainty in the measurement of fair value as of the reporting date. The significant unobservable inputs used in the fair value measurement of Main Street’s LMM equity securities, which are generally valued through an average of the discounted cash flow technique and the market comparable/enterprise value technique (unless one of these approaches is determined to not be appropriate), are (i) EBITDA multiples and (ii) the weighted-average cost of capital (“WACC”). Significant increases (decreases) in EBITDA multiple inputs in isolation would result in a significantly higher (lower) fair value measurement. On the contrary, significant increases (decreases) in WACC inputs in isolation would result in a significantly lower (higher) fair value measurement. The significant unobservable inputs used in the fair value measurement of Main Street’s LMM, Private Loan and Middle Market securities are (i) risk adjusted discount rates used in the Yield-to-Maturity valuation technique (see Note B.1. — Summary of Significant Accounting Policies — Valuation of the Investment Portfolio ) and (ii) the percentage of expected principal recovery. Significant increases (decreases) in any of these discount rates in isolation would result in a significantly lower (higher) fair value measurement. Significant increases (decreases) in any of these expected principal recovery percentages in isolation would result in a significantly higher (lower) fair value measurement. However, due to the nature of certain investments, fair value measurements may be based on other criteria, such as third-party appraisals of collateral and fair values as determined by independent third parties, which are not presented in the tables below. The following tables provide a summary of the significant unobservable inputs used to fair value Main Street’s Level 3 portfolio investments as of March 31, 2023 and December 31, 2022: Type of Fair Value as of March 31, 2023 (in thousands) Valuation Technique Significant Unobservable Inputs Range(3) Weighted Average(3) Median(3) Equity investments $ 1,217,243 Discounted cash flow WACC 9.3% - 22.3% 14.4 % 15.2 % Market comparable / Enterprise value EBITDA multiple (1) 4.5x - 8.5x (2) 6.8x 6.2x Debt investments $ 2,696,096 Discounted cash flow Risk adjusted discount factor 6.0% - 16.4% (2) 10.2 % 10.5 % Expected principal recovery percentage 0.0% - 100.0% 99.5 % 100.0 % Debt investments $ 245,636 Market approach Third-party quote 3.0 - 97.5 87.3 93.9 Total Level 3 investments $ 4,158,975 ____________________ (1) EBITDA may include proforma adjustments and/or other addbacks based on specific circumstances related to each investment. (2) Range excludes outliers that are greater than one standard deviation from the mean. Including these outliers, the range for EBITDA multiple is 2.0x - 15.7x and the range for risk adjusted discount factor is 3.4% - 35.0%. (3) Does not include investments for which the valuation technique does not include the use of the applicable fair value input. Type of Investment Fair Value as of December 31, 2022 (in thousands) Valuation Technique Significant Unobservable Inputs Range(3) Weighted Average(3) Median(3) Equity investments $ 1,172,077 Discounted cash flow WACC 9.4% - 22.5% 14.5 % 15.4 % Market comparable / Enterprise value EBITDA multiple (1) 4.3x - 8.3x (2) 6.7x 6.0x Debt investments $ 2,663,958 Discounted cash flow Risk adjusted discount factor 5.7% - 15.7% (2) 10.0 % 10.3 % Expected principal recovery percentage 0.0% - 100.0% 99.4 % 100.0 % Debt investments $ 264,238 Market approach Third-party quote 5.6 - 98.5 87.0 91.4 Total Level 3 investments $ 4,100,273 ____________________ (1) EBITDA may include proforma adjustments and/or other addbacks based on specific circumstances related to each investment. (2) Range excludes outliers that are greater than one standard deviation from the mean. Including these outliers, the range for EBITDA multiple is 2.0x - 15.7x and the range for risk adjusted discount factor is 3.8% - 43.3%. (3) Does not include investments for which the valuation technique does not include the use of the applicable fair value input. The following tables provide a summary of changes in fair value of Main Street’s Level 3 portfolio investments for the three-month periods ended March 31, 2023 and 2022 (amounts in thousands): Type of Investment Fair Value as of December 31, 2022 Transfers Into Level 3 Hierarchy Redemptions/ Repayments New Investments Net Changes from Unrealized to Realized Net Unrealized Appreciation (Depreciation) Other(1) Fair Value as of March 31, 2023 Debt $ 2,928,196 $ — $ (88,300) $ 106,658 $ 33,064 $ (26,440) $ (11,446) $ 2,941,732 Equity 1,166,643 — (2,871) 8,476 (3,946) 29,890 14,022 1,212,214 Equity Warrant 5,434 — — — — 2,171 (2,576) 5,029 $ 4,100,273 $ — $ (91,171) $ 115,134 $ 29,118 $ 5,621 $ — $ 4,158,975 ____________________ (1) Includes the impact of non-cash conversions. These transactions represent non-cash investing activities. See additional cash flow information in the Consolidated Statements of Cash Flows. Type of Investment Fair Value as of December 31, 2021 Transfers Into Level 3 Hierarchy Redemptions/ Repayments New Investments Net Changes from Unrealized to Realized Net Unrealized Appreciation (Depreciation) Other(1) Fair Value as of March 31, 2022 Debt $ 2,509,568 $ — $ (183,699) $ 287,044 $ 2,123 $ (6,807) $ — $ 2,608,229 Equity 1,043,709 — (17,569) 24,711 418 22,512 — 1,073,781 Equity Warrant 6,560 — — — — 200 — 6,760 $ 3,559,837 $ — $ (201,268) $ 311,755 $ 2,541 $ 15,905 $ — $ 3,688,770 ____________________ (1) Includes the impact of non-cash conversions. These transactions represent non-cash investing activities. See additional cash flow information in the Consolidated Statements of Cash Flows. At March 31, 2023 and December 31, 2022, Main Street’s investments at fair value were categorized as follows in the fair value hierarchy for ASC 820 purposes: Fair Value Measurements (in thousands) At March 31, 2023 Fair Value Quoted Prices in Significant Other Significant LMM portfolio investments $ 2,112,619 $ — $ — $ 2,112,619 Private Loan portfolio investments 1,491,395 — — 1,491,395 Middle Market portfolio investments 306,244 — — 306,244 Other Portfolio investments 116,067 — — 116,067 External Investment Manager 132,650 — — 132,650 Short-term portfolio investments 1,942 — 1,942 — Total investments $ 4,160,917 $ — $ 1,942 $ 4,158,975 Fair Value Measurements (in thousands) At December 31, 2022 Fair Value Quoted Prices in Significant Other Significant LMM portfolio investments $ 2,060,459 $ — $ — $ 2,060,459 Private Loan portfolio investments 1,471,466 — — 1,471,466 Middle Market portfolio investments 329,119 — — 329,119 Other Portfolio investments 116,299 — — 116,299 External Investment Manager 122,930 — — 122,930 Short-term portfolio investments 1,904 — 1,904 — Total investments $ 4,102,177 $ — $ 1,904 $ 4,100,273 Investment Portfolio Composition Main Street’s principal investment objective is to maximize its portfolio’s total return by generating current income from its debt investments and current income and capital appreciation from its equity and equity-related investments, including warrants, convertible securities and other rights to acquire equity securities in a portfolio company. Main Street seeks to achieve its investment objective through its LMM, Private Loan and Middle Market investment strategies. Main Street’s LMM investment strategy is focused on investments in secured debt, equity warrants and direct equity investments in privately held, LMM companies based in the United States. Main Street’s LMM portfolio companies generally have annual revenues between $10 million and $150 million, and its LMM investments generally range in size from $5 million to $75 million. The LMM debt investments are typically secured by a first priority lien on the assets of the portfolio company, can include either fixed or floating rate terms and generally have a term of between five Main Street’s private loan (“Private Loan”) investment strategy is focused on investments in privately held companies that are generally consistent with the size of its LMM portfolio companies or Middle Market portfolio companies, and its Private Loan investments generally range in size from $10 million to $75 million. Main Street’s Private Loan investments primarily consist of debt securities that have primarily been originated directly by Main Street or, to a lesser extent, through its strategic relationships with other investment funds on a collaborative basis through investments that are often referred to in the debt markets as “club deals” because of the small lender group size. In both cases, our Private Loan investments are typically made to support a company owned by or in the process of being acquired by a private equity sponsor. Main Street’s Private Loan portfolio debt investments are generally secured by a first priority lien on the assets of the portfolio company and typically have a term of between three Main Street’s Middle Market investment strategy is focused on investments in syndicated loans to or debt securities in Middle Market companies, which Main Street defines as companies with annual revenues between $150 million and $1.5 billion, and its Middle Market investments generally range in size from $3 million to $25 million. Main Street’s Middle Market portfolio debt investments are generally secured by a first priority lien on the assets of the portfolio company and typically have an expected duration of between three Main Street’s other portfolio (“Other Portfolio”) investments primarily consist of investments that are not consistent with the typical profiles for its LMM, Private Loan or Middle Market portfolio investments, including investments which may be managed by third parties. In the Other Portfolio, Main Street may incur indirect fees and expenses in connection with investments managed by third parties, such as investments in other investment companies or private funds. For Other Portfolio investments, Main Street generally receives distributions related to the assets held by the portfolio company. Those assets are typically expected to be liquidated over a five Based upon Main Street’s liquidity and capital structure management activities, Main Street’s Investment Portfolio may also include short-term portfolio investments that are atypical of Main Street’s LMM, Private Loan and Middle Market portfolio investments in that they are intended to be a short-term deployment of capital. Those assets are typically expected to be liquidated in one year or less. These short-term portfolio investments are not expected to be a significant portion of the overall Investment Portfolio. Main Street’s external asset management business is conducted through its External Investment Manager. The External Investment Manager earns management fees based on the assets under management for external parties and may earn incentive fees, or a carried interest, based on the performance of the assets managed. Main Street entered into an agreement with the External Investment Manager to share employees in connection with its asset management business generally, and specifically for its relationship with MSC Income Fund, Inc. (“MSC Income”). Through this agreement, Main Street shares employees with the External Investment Manager, including their related infrastructure, business relationships, management expertise and capital raising capabilities. Main Street allocates the related expenses to the External Investment Manager pursuant to the sharing agreement. Main Street’s total expenses for the three months ended March 31, 2023 and 2022 are net of expenses allocated to the External Investment Manager of $5.0 million and $2.8 million, respectively. Investment income, consisting of interest, dividends and fees, can fluctuate dramatically due to various factors, including the level of new investment activity, repayments of debt investments or sales of equity interests. Investment income in any given year could also be highly concentrated among several portfolio companies. For the three months ended March 31, 2023 and 2022, Main Street did not record investment income from any single portfolio company in excess of 10% of total investment income. The following tables provide a summary of Main Street’s investments in the LMM, Private Loan and Middle Market portfolios as of March 31, 2023 and December 31, 2022 (this information excludes Other Portfolio investments, short-term portfolio investments and the External Investment Manager, which are discussed further below): As of March 31, 2023 LMM (a) Private Loan Middle Market (dollars in millions) Number of portfolio companies 79 86 30 Fair value $ 2,112.6 $ 1,491.4 $ 306.2 Cost $ 1,727.9 $ 1,527.6 $ 391.0 Debt investments as a % of portfolio (at cost) 72.9 % 97.1 % 93.6 % Equity investments as a % of portfolio (at cost) 27.1 % 2.9 % 6.4 % % of debt investments at cost secured by first priority lien 99.2 % 99.5 % 99.3 % Weighted-average annual effective yield (b) 12.6 % 12.4 % 11.8 % Average EBITDA (c) $ 8.3 $ 38.1 $ 65.4 ____________________ (a) At March 31, 2023, Main Street had equity ownership in all of its LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was 41%. (b) The weighted-average annual effective yields were computed using the effective interest rates for all debt investments at cost as of March 31, 2023, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status. The weighted-average annual effective yield on Main Street’s debt portfolio as of March 31, 2023 including debt investments on non-accrual status was 12.2% for its LMM portfolio, 12.0% for its Private Loan portfolio and 10.4% for its Middle Market portfolio. The weighted-average annual effective yield is not reflective of what an investor in shares of Main Street’s common stock will realize on its investment because it does not reflect changes in the market value of Main Street’s stock, Main Street’s utilization of debt capital in its capital structure, Main Street’s expenses or any sales load paid by an investor. (c) The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Private Loan and Middle Market portfolios. These calculations exclude certain portfolio companies, including four LMM portfolio companies and two Private Loan portfolio companies, as EBITDA is not a meaningful valuation metric for Main Street’s investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate. As of December 31, 2022 LMM (a) Private Loan Middle Market (dollars in millions) Number of portfolio companies 78 85 31 Fair value $ 2,060.5 $ 1,471.5 $ 329.1 Cost $ 1,719.9 $ 1,500.3 $ 401.7 Debt investments as a % of portfolio (at cost) 73.7 % 97.1 % 93.8 % Equity investments as a % of portfolio (at cost) 26.3 % 2.9 % 6.2 % % of debt investments at cost secured by first priority lien 99.1 % 99.6 % 98.8 % Weighted-average annual effective yield (b) 12.3 % 11.6 % 11.0 % Average EBITDA (c) $ 8.0 $ 38.1 $ 68.7 ____________________ (a) At December 31, 2022, Main Street had equity ownership in all of its LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was 41%. (b) The weighted-average annual effective yields were computed using the effective interest rates for all debt investments at cost as of December 31, 2022, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status. The weighted-average annual effective yield on Main Street’s debt portfolio as of December 31, 2022 including debt investments on non-accrual status was 11.6% for its LMM portfolio, 11.2% for its Private Loan portfolio and 10.3% for its Middle Market portfolio. The weighted-average annual effective yield is not reflective of what an investor in shares of Main Street’s common stock will realize on its investment because it does not reflect changes in the market value of Main Street’s stock, Main Street’s utilization of debt capital in its capital structure, Main Street’s expenses or any sales load paid by an investor. (c) The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Private Loan and Middle Market portfolios. These calculations exclude certain portfolio companies, including three LMM portfolio companies and two Private Loan portfolio companies, as EBITDA is not a meaningful valuation metric for Main Street’s investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate. For the three months ended March 31, 2023 and 2022, Main Street achieved an annualized total return on investments of 13.4% and 11.8%, respectively. For the year ended December 31, 2022, Main Street achieved a total return on investments of 11.1%. Total return on investments is calculated using the interest, dividend and fee income, as well as the realized and unrealized change in fair value of the Investment Portfolio for the specified period. Main Street’s total return on investments is not reflective of what an investor in shares of Main Street’s common stock will realize on its investment because it does not reflect changes in the market value of Main Street’s stock, Main Street’s utilization of debt capital in its capital structure, Main Street’s expenses or any sales load paid by an investor. As of March 31, 2023, Main Street had Other Portfolio investments in 14 companies, collectively totaling $116.1 million in fair value and $119.7 million in cost basis and which comprised 2.8% and 3.2% of Main Street’s Investment Portfolio at fair value and cost, respectively. As of December 31, 2022, Main Street had Other Portfolio investments in 14 companies, collectively totaling $116.3 million in fair value and $120.4 million in cost basis and which comprised 2.8% and 3.2% of Main Street’s Investment Portfolio at fair value and cost, respectively. As discussed further in Note A.1. — Organization and Basis of Presentation—Organization , Main Street holds an investment in the External Investment Manager, a wholly-owned subsidiary that is treated as a portfolio investment. As of March 31, 2023, this investment had a fair value of $132.7 million and a cost basis of $29.5 million, which comprised 3.2% and 0.8% of Main Street’s Investment Portfolio at fair value and cost, respectively. As of December 31, 2022, this investment had a fair value of $122.9 million and a cost basis of $29.5 million, which comprised 3.0% and 0.8% of Main Street’s Investment Portfolio at fair value and cost, respectively. The following tables summarize the composition of Main Street’s total combined LMM, Private Loan and Middle Market portfolio investments at cost and fair value by type of investment as a percentage of the total combined LMM, Private Loan and Middle Market portfolio investments, as of March 31, 2023 and December 31, 2022 (this information excludes Other Portfolio investments, short-term portfolio investments and the External Investment Manager, which are discussed above). Cost: March 31, 2023 December 31, 2022 First lien debt 84.7 % 85.0 % Equity 14.6 14.2 Second lien debt 0.3 0.3 Equity warrants 0.2 0.2 Other 0.2 0.3 100.0 % 100.0 % Fair Value: March 31, 2023 December 31, 2022 First lien debt 74.6 % 75.2 % Equity 24.7 24.1 Second lien debt 0.4 0.3 Equity warrants 0.1 0.1 Other 0.2 0.3 100.0 % 100.0 % The following tables summarize the composition of Main Street’s total combined LMM, Private Loan and Middle Market portfolio investments by geographic region of the United States and other countries at cost and fair value as a percentage of the total combined LMM, Private Loan and Middle Market portfolio investments, as of March 31, 2023 and December 31, 2022 (this information excludes Other Portfolio investments, short-term portfolio investments and the External Investment Manager). The geographic composition is determined by the location of the corporate headquarters of the portfolio company. Cost: March 31, 2023 December 31, 2022 West 28.8 % 28.5 % Northeast 19.5 19.0 Southwest 19.1 20.1 Midwest 16.7 16.3 Southeast 13.9 14.0 Canada 0.4 0.6 Other Non-United States 1.6 1.5 100.0 % 100.0 % Fair Value: March 31, 2023 December 31, 2022 West 28.4 % 28.7 % Southwest 21.4 21.4 Northeast 19.1 18.8 Midwest 17.1 16.6 Southeast 12.2 12.4 Canada 0.3 0.6 Other Non-United States 1.5 1.5 100.0 % 100.0 % Main Street’s LMM, Private Loan and Middle Market portfolio investments are in companies conducting business in a variety of industries. The following tables summarize the composition of Main Street’s total combined LMM, Private Loan and Middle Market portfolio investments by industry at cost and fair value as of March 31, 2023 and December 31, 2022 (this information excludes Other Portfolio investments, short-term portfolio investments and the External Investment Manager). Cost: March 31, 2023 December 31, 2022 Internet Software & Services 8.0 % 8.0 % Machinery 7.3 7.4 Commercial Services & Supplies 6.7 6.7 Construction & Engineering 5.8 5.8 Distributors 5.2 5.1 Health Care Providers & Services 4.8 4.7 Diversified Consumer Services 4.6 4.5 Professional Services 4.6 4.2 Leisure Equipment & Products 4.5 4.5 IT Services 3.6 3.3 Specialty Retail 3.2 3.2 Energy Equipment & Services 3.1 3.7 Tobacco 3.1 3.1 Containers & Packaging 2.5 2.6 Media 2.4 2.4 Aerospace & Defense 2.4 2.3 Computers & Peripherals 2.2 2.2 Building Products 1.9 1.9 Software 1.9 1.9 Textiles, Apparel & Luxury Goods 1.8 1.9 Communications Equipment 1.8 1.8 Diversified Telecommunication Services 1.7 1.9 Auto Components 1.7 1.7 Food Products 1.6 1.6 Electronic Equipment, Instruments & Components 1.6 1.6 Diversified Financial Services 1.4 1.5 Internet & Catalog Retail 1.3 1.3 Health Care Equipment & Supplies 1.3 1.3 Food & Staples Retailing 1.1 1.2 Chemicals 1.1 1.1 Hotels, Restaurants & Leisure 1.1 1.1 Electrical Equipment 1.0 1.0 Household Products 1.0 0.4 Other (1) 2.7 3.1 100.0 % 100.0 % ____________________ (1) Includes various industries with each industry individually less than 1.0% of the total combined LMM, Private Loan and Middle Market portfolio investments at each date. Fair Value: March 31, 2023 December 31, 2022 Machinery 8.4 % 8.4 % Internet Software & Services 6.9 6.8 Diversified Consumer Services 6.8 6.8 Commercial Services & Supplies 6.0 6.1 Construction & Engineering 5.6 5.7 Distributors 5.6 5.5 Health Care Providers & Services 4.5 4.3 Professional Services 4.1 3.8 Leisure Equipment & Products 3.9 4.0 Specialty Retail 3.3 3.5 Tobacco 3.3 3.4 IT Services 3.3 3.1 Computers & Peripherals 3.1 3.0 Media 2.9 3.0 Energy Equipment & Services 2.7 2.7 Containers & Packaging 2.6 2.8 Aerospace & Defense 2.2 2.2 Software 2.1 2.1 Building Products 1.8 1.9 Food Products 1.8 1.8 Textiles, Apparel & Luxury Goods 1.6 1.8 Diversified Financial Services 1.6 1.7 Auto Components 1.6 1.6 Diversified Telecommunication Services 1.5 1.8 Internet & Catalog Retail 1.3 1.3 Chemicals 1.1 1.1 Construction Materials 1.1 1.0 Food & Staples Retailing 1.0 1.1 Health Care Equipment & Supplies 1.0 1.0 Electrical Equipment 1.0 1.0 Other (1) 6.3 5.7 100.0 100.0 ____________________ (1) Includes various industries with each industry individually less than 1.0% of the total combined LMM, Private Loan and Middle Market portfolio investments at each date. At March 31, 2023 and December 31, 2022, Main Street had no portfolio investment that was greater than 10% of the Investment Portfolio at fair value. Unconsolidated Significant Subsidiaries In accordance with Rules 3-09 and 4-08(g) of Regulation S-X, Main Street must determine which of its unconsolidated controlled portfolio companies, if any, are considered “significant subsidiaries.” In evaluating its unconsolidated controlled portfolio companies in accordance with Regulation S-X, there are two tests that Main Street must utilize to determine if any of Main Street’s Control Investments (as defined in Note A–Organization and Basis of Presentation , including those unconsolidated portfolio companies defined as Control Investments in which Main Street does not own greater than 50% of the voting securities nor have rights to maintain greater than 50% of the board representation) are considered significant subsidiaries: the investment test and the income test. The investment test is generally measured by dividing Main Street’s investment in the Control Investment by the value of Main Street’s total investments. The income test is generally measured by dividing the absolute value of the combined sum of total investment income, net realized gain (loss) and net unrealized appreciation (depreciation) from the relevant Control Investment for the period being tested by the absolute value of Main Street’s change in net assets resulting from operations for the same period. Rules 3-09 and 4-08(g) of Regulation S-X require Main Street to include (1) separate audited financial statements of an unconsolidated majority-owned subsidiary (Control Investments in which Main Street owns greater than 50% of the voting securities) in an annual report and (2) summarized financial information of a Control Investment in a quarterly report, respectively, if certain thresholds of the investment or income tests are exceeded and the unconsolidated portfolio company qual

EXTERNAL INVESTMENT MANAGER

EXTERNAL INVESTMENT MANAGER	3 Months Ended
	Mar. 31, 2023
Investment Company [Abstract]
External Investment Manager	EXTERNAL INVESTMENT MANAGER As discussed further in Note A.1. — Organization and Basis of Presentation — Organization and Note C — Fair Value Hierarchy for Investments — Portfolio Composition — Investment Portfolio Composition , the External Investment Manager provides investment management and other services to External Parties. The External Investment Manager is accounted for as a portfolio investment of MSCC since the External Investment Manager conducts all of its investment management activities for External Parties. The External Investment Manager serves as the investment adviser and administrator to MSC Income pursuant to an Investment Advisory and Administrative Services Agreement entered into in October 2020 between the External Investment Manager and MSC Income (the “Advisory Agreement”). Under the Advisory Agreement, the External Investment Manager earns a 1.75% annual base management fee on MSC Income’s average total assets, an incentive fee equal to 20% of pre-investment fee net investment income above a specified investment return hurdle rate and a 20% incentive fee on cumulative net realized capital gains in exchange for providing advisory services to MSC Income. As described more fully in Note L — Related Party Transactions , the External Investment Manager also serves as the investment adviser and administrator to MS Private Loan Fund I, LP, a private investment fund with a strategy to co-invest with Main Street in Private Loan portfolio investments (the “Private Loan Fund”). The External Investment Manager entered into an Investment Management Agreement in December 2020 with the Private Loan Fund, pursuant to which the External Investment Manager provides investment advisory and management services to the Private Loan Fund in exchange for an asset-based fee and certain incentive fees. The External Investment Manager may also advise other clients, including funds and separately managed accounts, pursuant to advisory and services agreements with such clients in exchange for asset-based and incentive fees. The External Investment Manager provides administrative services for certain External Party clients that, to the extent not waived, are reported as administrative services fees. The administrative services fees generally represent expense reimbursements for a portion of the compensation, overhead and related expenses for certain professionals directly attributable to performing administrative services for clients. These fees are recognized as other revenue in the period in which the related services are rendered. Main Street determines the fair value of the External Investment Manager using the Waterfall valuation method under the market approach (see further discussion in Note B.1. — Summary of Significant Accounting Policies — Valuation of the Investment Portfolio ). Any change in fair value of the investment in the External Investment Manager is recognized on Main Street’s Consolidated Statements of Operations in “Net Unrealized Appreciation (Depreciation) — Control investments.” The External Investment Manager is an indirect wholly-owned subsidiary of MSCC owned through a Taxable Subsidiary and is a disregarded entity for tax purposes. The External Investment Manager has entered into a tax sharing agreement with its Taxable Subsidiary owner. Since the External Investment Manager is accounted for as a portfolio investment of Main Street and is not included as a consolidated subsidiary of Main Street in its consolidated financial statements, and as a result of the tax sharing agreement with its Taxable Subsidiary owner, for financial reporting purposes the External Investment Manager is treated as if it is taxed at corporate income tax rates based on its taxable income and, as a result of its activities, may generate income tax expense or benefit. Main Street owns the External Investment Manager through the Taxable Subsidiary to allow MSCC to continue to comply with the “source-of-income” requirements contained in the RIC tax provisions of the Code. The taxable income, or loss, of the External Investment Manager may differ from its book income, or loss, due to temporary book and tax timing differences and permanent differences. As a result of the above described financial reporting and tax treatment, the External Investment Manager provides for any income tax expense, or benefit, and any tax assets or liabilities in its separate financial statements. Main Street shares employees with the External Investment Manager and allocates costs related to such shared employees to the External Investment Manager generally based on a combination of the direct time spent, new investment origination activity and assets under management, depending on the nature of the expense. The total contribution of the External Investment Manager to Main Street’s net investment income consists of the combination of the expenses allocated to the External Investment Manager and the dividend income earned from the External Investment Manager. For the three months ended March 31, 2023 and 2022, the total contribution to Main Street’s net investment income was $8.1 million and $5.1 million, respectively. Summarized financial information from the separate financial statements of the External Investment Manager as of March 31, 2023 and December 31, 2022 and for the three months ended March 31, 2023 and 2022 is as follows: As of As of March 31, December 31, 2022 (dollars in thousands) Accounts receivable - advisory clients $ 9,405 $ 8,130 Intangible Asset 29,500 29,500 Total assets $ 38,905 $ 37,630 Accounts payable to MSCC and its subsidiaries $ 6,349 $ 4,455 Dividend payable to MSCC and its subsidiaries 3,056 3,675 Equity 29,500 29,500 Total liabilities and equity $ 38,905 $ 37,630 Three Months Ended March 31, 2023 2022 (dollars in thousands) Management fee income $ 5,470 $ 5,444 Incentive fees 3,304 137 Administrative services fees 151 151 Total revenues 8,925 5,732 Expenses allocated from MSCC or its subsidiaries: Salaries, share-based compensation and other personnel costs (4,268) (2,260) Other G&A expenses (730) (557) Total allocated expenses (4,998) (2,817) Pre-tax income 3,927 2,915 Tax expense (871) (642) Net income $ 3,056 $ 2,273

DEBT

DEBT	3 Months Ended
	Mar. 31, 2023
Debt Disclosure [Abstract]
DEBT	DEBT Summary of debt as of March 31, 2023 is as follows: Outstanding Unamortized Debt Issuance (Costs)/Premiums (1) Recorded Value Estimated Fair Value (2) (dollars in thousands) Corporate Facility $ 394,000 $ — $ 394,000 $ 394,000 SPV Facility 170,000 — 170,000 170,000 July 2026 Notes 500,000 (1,733) 498,267 438,945 May 2024 Notes 450,000 590 450,590 439,754 SBIC Debentures 334,000 (5,794) 328,206 261,555 December 2025 Notes 150,000 (1,422) 148,578 153,598 Total Debt $ 1,998,000 $ (8,359) $ 1,989,641 $ 1,857,852 ____________________ (1) The unamortized debt issuance costs for the Credit Facilities are reflected as Deferred financing costs on the Consolidated Balance Sheets, while the deferred debt issuance costs related to the July 2026 Notes, May 2024 Notes, December 2025 Notes and SBIC Debentures are reflected as contra-liabilities on the Consolidated Balance Sheets. (2) Estimated fair value for outstanding debt if Main Street had adopted the fair value option under ASC 825. See discussion of the methods used to estimate the fair value of Main Street’s debt in Note B.11. — Summary of Significant Accounting Policies — Fair Value of Financial Instruments. Summary of debt as of December 31, 2022 is as follows: Outstanding Unamortized Debt Issuance (Costs)/Premiums (1) Recorded Value Estimated Fair Value (2) (dollars in thousands) Corporate Facility $ 407,000 $ — $ 407,000 $ 407,000 SPV Facility 200,000 — 200,000 200,000 July 2026 Notes 500,000 (1,864) 498,136 434,250 May 2024 Notes 450,000 727 450,727 444,749 SBIC Debentures 350,000 (6,086) 343,914 290,204 December 2025 Notes 100,000 (675) 99,325 106,607 Total Debt $ 2,007,000 $ (7,898) $ 1,999,102 $ 1,882,810 ____________________ (1) The unamortized debt issuance costs for the Credit Facilities are reflected as Deferred financing costs on the Consolidated Balance Sheets, while the deferred debt issuance costs related to the July 2026 Notes, May 2024 Notes, December 2025 Notes and SBIC Debentures are reflected as contra-liabilities on the Consolidated Balance Sheets. (2) Estimated fair value for outstanding debt if Main Street had adopted the fair value option under ASC 825. See discussion of the methods used to estimate the fair value of Main Street’s debt in Note B.11. — Summary of Significant Accounting Policies — Fair Value of Financial Instruments. Summarized interest expense for the three months ended March 31, 2023 and 2022 is as follows: Three Months Ended March 31, 2023 2022 (dollars in thousands) Corporate Facility $ 6,610 $ 2,059 SPV Facility 3,427 — July 2026 Notes 3,882 3,882 May 2024 Notes 5,714 5,714 SBIC Debentures 2,752 2,799 December 2025 Notes 2,612 — December 2022 Notes — 2,233 Total Interest Expense $ 24,997 $ 16,687 SBIC Debentures Under existing SBIC regulations, SBA-approved SBICs under common control have the ability to issue debentures guaranteed by the SBA up to a regulatory maximum amount of $350.0 million. Main Street’s SBIC debentures payable, under existing SBA-approved commitments, were $334.0 million as of March 31, 2023 and $350.0 million as of December 31, 2022. SBIC debentures provide for interest to be paid semiannually, with principal due at the applicable 10-year maturity date of each debenture. Main Street expects to maintain SBIC debentures under the SBIC program in the future, subject to periodic repayments and borrowings, in an amount up to the regulatory maximum amount for affiliated SBIC funds. The weighted-average annual interest rate on the SBIC debentures was 2.9% as of March 31, 2023 and December 31, 2022. The first principal maturity due under the existing SBIC debentures is in 2024, and the weighted-average remaining duration as of March 31, 2023 was 5.1 years. In accordance with SBIC regulations, the Funds are precluded from incurring additional non-SBIC debt without the prior approval of the SBA. As of March 31, 2023, the SBIC debentures consisted of (i) $159.0 million par value of SBIC debentures outstanding issued by MSMF, with a recorded value of $156.2 million that was net of unamortized debt issuance costs of $2.8 million and (ii) $175.0 million par value of SBIC debentures issued by MSC III with a recorded value of $172.0 million that was net of unamortized debt issuance costs of $3.0 million. Corporate Facility Main Street maintains the Corporate Facility to provide additional liquidity to support its investment and operational activities. As of March 31, 2023, the Corporate Facility included total commitments of $980.0 million from a diversified group of 18 lenders and contained an accordion feature with the right to request an increase in commitments under the facility from new and existing lenders on the same terms and conditions as the existing commitments up to a total of $1.4 billion. The revolving period under the Corporate Facility expires in August 2026 and the Corporate Facility is scheduled to mature in August 2027. As of March 31, 2023, borrowings under the Corporate Facility bore interest, subject to Main Street’s election and resetting on a monthly basis on the first of each month, on a per annum basis at a rate equal to the applicable SOFR rate plus an applicable credit spread adjustment of 0.10% plus (i) 1.875% (or the applicable Prime rate plus 0.875%) as long as Main Street meets certain agreed upon excess collateral and maximum leverage requirements or (ii) 2.0% (or the applicable Prime Rate plus 1.0%) otherwise. Main Street pays unused commitment fees of 0.25% per annum on the unused lender commitments under the Corporate Facility. The Corporate Facility is secured by a first lien on the assets of MSCC and its subsidiaries, excluding the equity ownership or assets of the Funds and the External Investment Manager. In connection with the Corporate Facility, MSCC has made customary representations and warranties and is required to comply with various covenants, reporting requirements and other customary requirements for similar credit facilities. As of March 31, 2023, the interest rate on the Corporate Facility was 6.6%. The average interest rate for borrowings under the Corporate Facility was 6.5% and 2.0% for the three months ended March 31, 2023 and 2022, respectively. As of March 31, 2023, Main Street was in compliance with all financial covenants of the Corporate Facility. SPV Facility In November 2022 and December 2022, MSCC Funding I, LLC (“MSCC Funding”), a wholly-owned Structured Subsidiary that primarily holds originated loan investments, entered into (i) the SPV Facility with MSCC as collateral manager and (ii) a lender joinder agreement (the “Joinder Agreement”) to the SPV Facility that increased the total number of lenders from three to four lenders and increased the total commitments under the SPV Facility from $240.0 million to $255.0 million, respectively. As of March 31, 2023, the SPV Facility included total commitments of $255.0 million and an accordion feature, subject to the satisfaction of various conditions, that could bring total commitments and borrowing availability to up to $450.0 million. The revolving period under the SPV Facility expires in November 2025 and the SPV Facility is scheduled to mature in November 2027. Advances under the SPV Facility bear interest at a per annum rate equal to the one-month SOFR in effect, plus a 0.10% credit spread adjustment plus an applicable margin of 2.50% during the revolving period and 2.625% and 2.75% during the first and second years thereafter, respectively. MSCC Funding pays a commitment fee of 0.50% per annum on the unused lender commitments up to 35% the total lender commitments and 0.75% per annum on the unused lender commitments greater than 35% of the total lender commitments. The SPV Facility is secured by a collateral loan on the assets of MSCC Funding and its subsidiaries. In connection with the SPV Facility, MSCC Funding has made customary representations and warranties and is required to comply with various covenants, reporting requirements and other customary requirements for similar credit facilities. As of March 31, 2023, the interest rate on the SPV Facility was 7.3%. The average interest rate for borrowings under the SPV Facility was 7.1% for the three months ended March 31, 2023. As of March 31, 2023, MSCC Funding was in compliance with all financial covenants of the SPV Facility. MSCC Funding balance sheets as of March 31, 2023 and December 31, 2022 are as follows: Balance Sheets (dollars in thousands) March 31, 2023 December 31, 2022 (Unaudited) ASSETS Investments at fair value: Non-Control Investments (cost: $300,018 and $314,752 as of March 31, 2023 and December 31, 2022, respectively) $ 301,102 $ 316,507 Cash and cash equivalents 10,865 10,838 Interest and dividend receivable and other assets 3,281 2,828 Accounts receivable to MSCC and its subsidiaries — 556 Receivable for securities sold 62 369 Deferred financing costs (net of accumulated amortization of $282 and $141 as of March 31, 2023 and December 31, 2022, respectively) 2,679 2,630 Total assets 317,989 333,728 LIABILITIES SPV Facility $ 170,000 $ 200,000 Accounts payable and other liabilities 192 112 Interest payable 1,104 1,272 Total liabilities 171,296 201,384 NET ASSETS Contributed capital 136,883 126,010 Total undistributed earnings 9,810 6,334 Total net assets 146,693 132,344 Total liabilities and net assets $ 317,989 $ 333,728 MSCC Funding statement of operations for the three months ended March 31, 2023 are as follows: Statement of Operations (dollars in thousands) (Unaudited) March 31, 2023 INVESTMENT INCOME: Interest, fee and dividend income: Non‑Control/Non‑Affiliate investments $ 8,717 EXPENSES: Interest (3,428) Management Fee to MSCC (365) General and administrative (57) Total expenses (3,850) NET INVESTMENT INCOME (LOSS) 4,867 NET UNREALIZED APPRECIATION (DEPRECIATION): Non‑Control/Non‑Affiliate investments (1,391) SBIC debentures — Total net unrealized appreciation (depreciation) (1,391) NET INCREASE (DECREASE) IN NET ASSETS RESULTING FROM OPERATIONS $ 3,476 December 2022 Notes In November 2017, Main Street issued $185.0 million in aggregate principal amount of 4.50% unsecured notes due December 1, 2022 (the “December 2022 Notes”) at an issue price of 99.16%. The December 2022 Notes bore interest at a rate of 4.50% per year payable semiannually on June 1 and December 1 of each year. In December 2022, Main Street repaid the entire principal amount of the issued and outstanding December 2022 Notes at par value plus the accrued and unpaid interest. May 2024 Notes In April 2019, Main Street issued $250.0 million in aggregate principal amount of 5.20% unsecured notes due May 1, 2024 (the “May 2024 Notes”) at an issue price of 99.125%. Subsequently, in December 2019, Main Street issued an additional $75.0 million aggregate principal amount of the May 2024 Notes at an issue price of 105.0% and, i n July 2020, Main Street issued an additional $125.0 million aggregate principal amount at an issue price of 102.7%. The May 2024 Notes issued in December 2019 and July 2020 have identical terms as, and are a part of a single series with, the May 2024 Notes issued in April 2019. The May 2024 Notes are unsecured obligations and rank pari passu with Main Street’s current and future unsecured indebtedness. The May 2024 Notes may be redeemed in whole or in part at any time at Main Street’s option subject to certain make-whole provisions. The May 2024 Notes bear interest at a rate of 5.20% per year payable semiannually on May 1 and November 1 of each year. As of March 31, 2023, Main Street was in compliance with all covenants and other requirements of the May 2024 Notes. July 2026 Notes In January 2021, Main Street issued $300.0 million in aggregate principal amount of 3.00% unsecured notes due July 14, 2026 (the “July 2026 Notes”) at an issue price of 99.004%. Subsequently, in October 2021, Main Street issued an additional $200.0 million aggregate principal amount of the July 2026 Notes at an issue price of 101.741%. The July 2026 Notes issued in October 2021 have identical terms as, and are a part of a single series with, the July 2026 Notes issued in January 2021. The July 2026 Notes are unsecured obligations and rank pari passu with Main Street’s current and future unsecured indebtedness. The July 2026 Notes may be redeemed in whole or in part at any time at Main Street’s option subject to certain make-whole provisions. The July 2026 Notes bear interest at a rate of 3.00% per year payable semiannually on January 14 and July 14 of each year. As of March 31, 2023, Main Street was in compliance with all covenants and other requirements of the July 2026 Notes. December 2025 Notes In December 2022, Main Street issued $100.0 million in aggregate principal amount of 7.84% Series A unsecured notes due December 23, 2025 (the “December 2025 Series A Notes”) at par. In February 2023, Main Street issued an additional $50.0 million in aggregate principal amount of 7.53% Series B unsecured notes due December 23, 2025 (the “December 2025 Series B Notes” and, together with the December 2025 Series A Notes, the “December 2025 Notes”), at par. The December 2025 Notes are unsecured obligations and rank pari passu with Main Street’s current and future unsecured indebtedness. The December 2025 Notes may be redeemed in whole or in part at any time at Main Street’s option at par plus accrued interest to the prepayment date, subject to certain make-whole provisions. The December 2025 Series A Notes and the December 2025 Series B Notes bear interest at a rate of 7.84% and 7.53% per year, respectively, payable semiannually on June 23 and December 23 of each year. In addition, Main Street is obligated to offer to repay the December 2025 Notes at par plus accrued and unpaid interest if certain change in control events occur. The December 2025 Notes will bear interest at an increased rate from the date that (i) the December 2025 Notes receive a below investment grade rating by a rating agency if there is one or two rating agencies providing ratings of the December 2025 Notes, or two-thirds of the rating agencies if there are three rating agencies who are rating the notes (a “Below Investment Grade Event”), or (ii) the ratio of the Company’s consolidated secured indebtedness (other than indebtedness of the Funds or any Structured Subsidiaries) to the value of its consolidated total assets is greater than 0.35 to 1.00 (a “Secured Debt Ratio Event”), to and until the date on which the Below Investment Grade Event and the Secured Debt Ratio Event are no longer continuing. The governing agreement for the December 2025 Notes contains customary terms and conditions for senior unsecured notes issued in a private placement, as well as customary events of default with customary cure and notice periods. As of March 31, 2023, Main Street was in compliance with all covenants and other requirements of the December 2025 Notes.

FINANCIAL HIGHLIGHTS

FINANCIAL HIGHLIGHTS	3 Months Ended
	Mar. 31, 2023
Investment Company [Abstract]
FINANCIAL HIGHLIGHTS	FINANCIAL HIGHLIGHTS Three Months Ended March 31, Per Share Data: 2023 2022 NAV at the beginning of the period $ 26.86 $ 25.29 Net investment income (1) 1.02 0.73 Net realized gain (loss) (1)(2) (0.36) 0.05 Net unrealized appreciation (depreciation) (1)(2) 0.44 0.20 Income tax benefit (provision) (1)(2) (0.10) (0.07) Net increase in net assets resulting from operations (1) 1.00 0.91 Dividends paid from net investment income (0.85) (0.72) Dividends paid (0.85) (0.72) Impact of the net change in monthly dividends declared prior to the end of the period and paid in the subsequent period (0.01) (0.01) Accretive effect of stock offerings (issuing shares above NAV per share) 0.15 0.35 Accretive effect of DRIP issuance (issuing shares above NAV per share) 0.03 0.03 Other (3) 0.05 0.04 NAV at the end of the period $ 27.23 $ 25.89 Market value at the end of the period $ 39.46 $ 42.64 Shares outstanding at the end of the period 79,794,089 72,370,407 ____________________ (1) Based on weighted-average number of common shares outstanding for the period. (2) Net realized gains or losses, net unrealized appreciation or depreciation, and income tax provision or benefit can fluctuate significantly from period to period. (3) Includes the impact of the different share amounts as a result of calculating certain per share data based on the weighted-average basic shares outstanding during the period and certain per share data based on the shares outstanding as of a period end or transaction date. Three Months Ended March 31, 2023 2022 (dollars in thousands) NAV at end of period $ 2,172,922 $ 1,873,654 Average NAV $ 2,140,754 $ 1,831,250 Average outstanding debt $ 1,992,000 $ 1,784,750 Ratio of total expenses, including income tax expense, to average NAV (1)(2) 2.21 % 1.76 % Ratio of operating expenses to average NAV (2)(3) 1.84 % 1.48 % Ratio of operating expenses, excluding interest expense, to average NAV (2)(3) 0.67 % 0.57 % Ratio of net investment income to average NAV (2) 3.78 % 2.85 % Portfolio turnover ratio (2) 1.54 % 6.49 % Total investment return (2)(4) 9.13 % (3.32) % Total return based on change in NAV (2)(5) 3.77 % 3.64 % ____________________ (1) Total expenses are the sum of operating expenses and net income tax provision. Net income tax provision includes the accrual of net deferred tax provision relating to the net unrealized appreciation or depreciation on portfolio investments held in Taxable Subsidiaries and due to the change in the loss carryforwards, which are non-cash in nature and may vary significantly from period to period. Main Street is required to include net deferred tax provision in calculating its total expenses even though these net deferred taxes are not currently payable or receivable. (2) Not annualized. (3) Unless otherwise noted, operating expenses include interest, compensation, general and administrative and share-based compensation expenses, net of expenses allocated to the External Investment Manager of $5.0 million and $2.8 million for the three months ended March 31, 2023 and 2022, respectively. (4) Total investment return is based on the purchase of stock at the current market price on the first day and a sale at the current market price on the last day of each period reported on the table and assumes reinvestment of dividends at prices obtained by Main Street’s dividend reinvestment plan during the period. The return does not reflect any sales load that may be paid by an investor. (5) Total return based on change in NAV was calculated using the sum of ending NAV plus dividends to stockholders and other non-operating changes during the period, divided by the beginning NAV. Non-operating changes include any items that affect NAV other than the net increase in net assets resulting from operations, such as the effects of stock offerings, shares issued under the DRIP and equity incentive plans and other miscellaneous items.

DIVIDENDS, DISTRIBUTIONS AND TA

DIVIDENDS, DISTRIBUTIONS AND TAXABLE INCOME	3 Months Ended
	Mar. 31, 2023
Income Tax Disclosure [Abstract]
DIVIDENDS, DISTRIBUTIONS AND TAXABLE INCOME	DIVIDENDS, DISTRIBUTIONS AND TAXABLE INCOME Main Street currently pays regular monthly dividends to its stockholders and periodically pays supplemental dividends to its stockholders. Future dividends, if any, will be determined by its Board of Directors on a quarterly basis. Main Street paid regular monthly dividends of $0.225 per share, totaling $53.6 million, or $0.675 per share, for the three months ended March 31, 2023 compared to aggregate regular monthly dividends of $46.0 million, or $0.645 per share, for the three months ended March 31, 2022. Main Street also paid a supplemental dividend of $14.0 million, or $0.175 per share, during the three months ended March 31, 2023 compared to supplemental dividends paid of $5.4 million, or $0.075 per share, during the three months ended March 31, 2022. MSCC has elected to be treated for U.S. federal income tax purposes as a RIC. MSCC’s taxable income includes the taxable income generated by MSCC and certain of its subsidiaries, including the Funds and Structured Subsidiaries, which are treated as disregarded entities for tax purposes. As a RIC, MSCC generally will not pay corporate-level U.S. federal income taxes on any net ordinary taxable income or capital gains that MSCC distributes to its stockholders. MSCC must generally distribute at least 90% of its “investment company taxable income” (which is generally its net ordinary taxable income and realized net short-term capital gains in excess of realized net long-term capital losses) and 90% of its tax-exempt income to maintain its RIC status (pass-through tax treatment for amounts distributed). As part of maintaining RIC status, undistributed taxable income (subject to a 4% non-deductible U.S. federal excise tax) pertaining to a given fiscal year may be distributed up to twelve months subsequent to the end of that fiscal year, provided such dividends are declared on or prior to the later of (i) filing of the U.S. federal income tax return for the applicable fiscal year or (ii) the fifteenth day of the ninth month following the close of the year in which such taxable income was generated. The determination of the tax attributes for Main Street’s distributions is made annually, based upon its taxable income for the full year and distributions paid for the full year. Therefore, a determination made on an interim basis may not be representative of the actual tax attributes of distributions for a full year. Ordinary dividend distributions from a RIC do not qualify for the 20% maximum tax rate (plus a 3.8% Medicare surtax, if applicable) on dividend income from domestic corporations and qualified foreign corporations, except to the extent that the RIC received the income in the form of qualifying dividends from domestic corporations and qualified foreign corporations. The tax attributes for distributions will generally include both ordinary income and qualified dividends, but may also include either one or both of capital gains and return of capital. Listed below is a reconciliation of “Net increase in net assets resulting from operations” to taxable income and to total distributions declared to common stockholders for the three months ended March 31, 2023 and 2022. Three Months Ended March 31, 2023 2022 (estimated, dollars in thousands) Net increase in net assets resulting from operations $ 79,592 $ 65,203 Book-tax difference from share-based compensation expense 2,747 2,818 Net unrealized appreciation (35,118) (14,752) Income tax provision 8,114 5,097 Pre-tax book (income) loss not consolidated for tax purposes 15,791 (2,933) Book income and tax income differences, including debt origination, structuring fees, dividends, realized gains and changes in estimates 5,824 2,862 Estimated taxable income (1) 76,950 58,295 Taxable income earned in prior year and carried forward for distribution in current year 49,216 50,834 Taxable income earned prior to period end and carried forward for distribution next period (76,289) (72,844) Dividend payable as of period end and paid in the following period 18,036 15,519 Total distributions accrued or paid to common stockholders $ 67,913 $ 51,804 ____________________ (1) MSCC’s taxable income for each period is an estimate and will not be finally determined until the company files its tax return for each year. Therefore, the final taxable income, and the taxable income earned in each period and carried forward for distribution in the following period, may be different than this estimate. The Taxable Subsidiaries primarily hold certain equity investments for Main Street. The Taxable Subsidiaries permit Main Street to hold equity investments in portfolio companies which are “pass-through” entities for tax purposes and to continue to comply with the “source-of-income” requirements contained in the RIC tax provisions of the Code. The Taxable Subsidiaries are consolidated with MSCC for U.S. GAAP financial reporting purposes, and the portfolio investments held by the Taxable Subsidiaries are included in Main Street’s consolidated financial statements as portfolio investments and recorded at fair value. The Taxable Subsidiaries are not consolidated with MSCC for income tax purposes and may generate income tax expense, or benefit, and tax assets and liabilities, as a result of their ownership of certain portfolio investments. The taxable income, or loss, of the Taxable Subsidiaries may differ from their book income, or loss, due to temporary book and tax timing differences and permanent differences. The Taxable Subsidiaries are each taxed at corporate income tax rates based on their taxable income. The income tax expense, or benefit, if any, and the related tax assets and liabilities, of the Taxable Subsidiaries are reflected in Main Street’s consolidated financial statements. The income tax expense (benefit) for Main Street is generally composed of (i) deferred tax expense (benefit), which is primarily the result of the net activity relating to the portfolio investments held in the Taxable Subsidiaries, including changes in loss carryforwards, changes in net unrealized appreciation or depreciation and other temporary book tax differences, and (ii) current tax expense, which is primarily the result of current U.S. federal income and state taxes and excise taxes on Main Street’s estimated undistributed taxable income. The income tax expense, or benefit, and the related tax assets and liabilities generated by the Taxable Subsidiaries, if any, are reflected in Main Street’s Consolidated Statements of Operations. Main Street’s provision for income taxes was comprised of the following for the three months ended March 31, 2023 and 2022: Three Months Ended March 31, 2023 2022 (dollars in thousands) Current tax expense: Federal $ 140 $ 52 State 857 543 Excise 740 714 Total current tax expense 1,737 1,309 Deferred tax expense: Federal 5,806 2,807 State 571 981 Total deferred tax expense 6,377 3,788 Total income tax provision $ 8,114 $ 5,097 The net deferred tax liability at March 31, 2023 and December 31, 2022 was $54.2 million and $47.8 million, respectively, with the change primarily related to changes in net unrealized appreciation or depreciation, changes in loss carryforwards, and other temporary book-tax differences relating to portfolio investments held by the Taxable Subsidiaries. At March 31, 2023, for U.S. federal income tax purposes, the Taxable Subsidiaries had a net operating loss carryforward from prior years which, if unused, will expire in various taxable years from 2034 through 2037. Any net operating losses generated in 2018 and future periods are not subject to expiration and will carryforward indefinitely until utilized. Additionally, the Taxable Subsidiaries have interest expense limitation carryforwards which have an indefinite carryforward period.

COMMON STOCK

COMMON STOCK	3 Months Ended
	Mar. 31, 2023
Equity [Abstract]
COMMON STOCK	COMMON STOCK Main Street maintains a program with certain selling agents through which it can sell shares of its common stock by means of at-the-market offerings from time to time (the “ATM Program”). During the three months ended March 31, 2023, Main Street sold 1,055,416 shares of its common stock at a weighted-average price of $39.15 per share and raised $41.3 million of gross proceeds under the ATM Program. Net proceeds were $40.9 million after commissions to the selling agents on shares sold and offering costs. As of March 31, 2023, sales transactions representing 27,570 shares had not settled and are not included in shares issued and outstanding on the face of the Consolidated Balance Sheets but are included in the weighted average shares outstanding in the Consolidated Statements of Operations and in the shares used to calculate the NAV per share. In March 2022, Main Street entered into new distribution agreements to sell up to 15,000,000 shares through the ATM Program. As of March 31, 2023, 9,407,268 shares remained available for sale under the ATM Program. During the year ended December 31, 2022, Main Street sold 5,407,382 shares of its common stock at a weighted-average price of $39.29 per share and raised $212.4 million of gross proceeds under the ATM Program. Net proceeds were $209.9 million after commissions to the selling agents on shares sold and offering costs.

DIVIDEND REINVESTMENT PLAN

DIVIDEND REINVESTMENT PLAN	3 Months Ended
	Mar. 31, 2023
Equity [Abstract]
DIVIDEND REINVESTMENT PLAN	DIVIDEND REINVESTMENT PLAN The dividend reinvestment feature of Main Street’s dividend reinvestment and direct stock purchase plan (the “DRIP”) provides for the reinvestment of dividends on behalf of its stockholders, unless a stockholder has elected to receive dividends in cash. As a result, if Main Street declares a cash dividend, its stockholders who have not “opted out” of the DRIP by the dividend record date will have their cash dividend automatically reinvested into additional shares of MSCC common stock. The share requirements of the DRIP may be satisfied through the issuance of shares of common stock or through open market purchases of common stock by the DRIP plan administrator. Newly issued shares will be valued based upon the final closing price of MSCC’s common stock on the valuation date determined for each dividend by Main Street’s Board of Directors. Shares purchased in the open market to satisfy the DRIP requirements will be valued based upon the average price of the applicable shares purchased, before any associated brokerage or other costs. Main Street’s DRIP is administered by its transfer agent on behalf of Main Street’s record holders and participating brokerage firms. Brokerage firms and other financial intermediaries may decide not to participate in Main Street’s DRIP but may provide a similar dividend reinvestment plan for their clients. Summarized DRIP information for the three months ended March 31, 2023 and 2022 is as follows: Three Months Ended March 31, 2023 2022 (dollars in thousands) DRIP participation $ 7,808 $ 4,813 Shares issued for DRIP 199,282 114,043

SHARE-BASED COMPENSATION

SHARE-BASED COMPENSATION	3 Months Ended
	Mar. 31, 2023
Share-Based Payment Arrangement [Abstract]
SHARE-BASED COMPENSATION	SHARE-BASED COMPENSATION Main Street accounts for its share-based compensation plans using the fair value method, as prescribed by ASC 718, Compensation—Stock Compensation . Accordingly, for restricted stock awards (“RSAs”), Main Street measured the grant date fair value based upon the market price of its common stock on the date of the grant and amortizes the fair value of the awards as share-based compensation expense over the requisite service period, which is generally the vesting term. Main Street’s Board of Directors approves the issuance of shares of restricted stock to Main Street employees pursuant to the Main Street Capital Corporation 2022 Equity and Incentive Plan (the “Equity and Incentive Plan”). These shares generally vest over a three-year period from the grant date. The fair value is expensed over the service period, starting on the grant date. The following table summarizes the restricted stock issuances approved by Main Street’s Board of Directors under the Equity and Incentive Plan, net of shares forfeited, if any, and the remaining shares of restricted stock available for issuance as of March 31, 2023. Restricted stock authorized under the plan 5,000,000 Less net restricted stock granted (48,792) Restricted stock available for issuance as of March 31, 2023 4,951,208 As of March 31, 2023, the following table summarizes the restricted stock issued to Main Street’s non-employee directors and the remaining shares of restricted stock available for issuance pursuant to the Main Street Capital Corporation 2022 Non-Employee Director Restricted Stock Plan. These shares are granted upon appointment or election to the board and vest on the day immediately preceding the annual meeting of stockholders following the respective grant date and are expensed over such service period. Restricted stock authorized under the plan 300,000 Less net restricted stock granted (3,825) Restricted stock available for issuance as of March 31, 2023 296,175 For the three months ended March 31, 2023 and 2022, Main Street recognized total share-based compensation expense of $4.1 million and $2.8 million, respectively, related to the restricted stock issued to Main Street employees and non-employee directors. Summarized RSAs for the three months ended March 31, 2023 is as follows: Three Months Ended March 31, 2023 Number Weighted-Average Grant-Date Fair Value Restricted Stock Awards (RSAs): of Shares ( $ per share) Non-vested, December 31, 2022 817,401 $ 38.78 Granted (1) 34,547 38.70 Vested (1)(2) (35,092) 39.16 Forfeited (7,581) 40.72 Non-vested, March 31, 2023 809,275 $ 38.74 Aggregate intrinsic value as of March 31, 2023 (in thousands) $ 31,934 (3) ___________________________ (1) Restricted units generally vest over a three-year period from the grant date (as noted above). (2) Vested shares included 10,489 shares withheld for payroll taxes paid on behalf of employees. (3) Aggregate intrinsic value is the product of total non-vested restricted shares as of March 31, 2023 and $39.46 per share, the closing price of our common stock on March 31, 2023. The total fair value of RSAs that vested during the three months ended March 31, 2023 was $1.4 million. As of March 31, 2023, there was $21.6 million of total unrecognized compensation expense related to Main Street’s non-vested restricted shares. This compensation expense is expected to be recognized over a remaining weighted-average period of 2.2 years as of March 31, 2023.

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	3 Months Ended
	Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES At March 31, 2023, Main Street had the following outstanding commitments (in thousands): Investments with equity capital commitments that have not yet funded: Amount Brightwood Capital Fund Investments Brightwood Capital Fund V, LP $ 3,000 Brightwood Capital Fund III, LP 300 3,300 Freeport Fund Investments Freeport First Lien Loan Fund III LP 6,733 Freeport Financial SBIC Fund LP 3,841 10,574 Harris Preston Fund Investments HPEP 4, L.P. 7,668 HPEP 3, L.P. 1,555 HPEP 423 COR, LP 600 2717 MH, L.P. 52 9,875 MS Private Loan Fund I, LP 750 UnionRock Energy Fund II, LP 2,124 Total Equity Commitments (1)(2) $ 26,623 Investments with commitments to fund revolving loans that have not been fully drawn or term loans with additional commitments not yet funded: Dalton US Inc. $ 16,865 Xenon Arc, Inc. 11,340 HEADLANDS OP-CO LLC 10,125 MS Private Loan Fund I, LP 10,000 JTI Electrical & Mechanical, LLC 8,421 PTL US Bidco, Inc 8,110 AMEREQUIP LLC. 7,704 SI East, LLC 7,500 NinjaTrader, LLC 7,472 Archer Systems, LLC 7,115 Veregy Consolidated, Inc. 5,875 Robbins Bros. Jewelry, Inc. 4,500 South Coast Terminals Holdings, LLC 4,465 Winter Services LLC 4,444 Channel Partners Intermediateco, LLC 4,346 Direct Marketing Solutions, Inc. 4,250 Bettercloud, Inc. 4,189 Microbe Formulas, LLC 3,601 Watterson Brands, LLC 3,453 Classic H&G Holdco, LLC 3,440 Paragon Healthcare, Inc. 3,245 VVS Holdco, LLC 3,200 SPAU Holdings, LLC 3,194 MetalForming AcquireCo, LLC 2,795 Batjer TopCo, LLC 2,700 Infolinks Media Buyco, LLC 2,520 IG Parent Corporation 2,500 Nebraska Vet AcquireCo, LLC 2,500 CaseWorthy, Inc. 2,459 West Star Aviation Acquisition, LLC 2,411 Centre Technologies Holdings, LLC 2,400 GRT Rubber Technologies LLC 2,385 ArborWorks, LLC 2,339 NWN Corporation 2,335 Bluestem Brands, Inc. 2,154 MB2 Dental Solutions, LLC 2,023 PPL RVs, Inc. 2,000 The Affiliati Network, LLC 2,000 Cody Pools, Inc. 1,896 Elgin AcquireCo, LLC 1,877 GULF PACIFIC ACQUISITION, LLC 1,868 Mako Steel, LP 1,826 Johnson Downie Opco, LLC 1,800 Career Team Holdings, LLC 1,800 Engineering Research & Consulting, LLC 1,638 MonitorUS Holding, LLC 1,634 Trantech Radiator Topco, LLC 1,600 Colonial Electric Company LLC 1,600 Chamberlin Holding LLC 1,600 Roof Opco, LLC 1,556 Burning Glass Intermediate Holding Company, Inc. 1,549 Pearl Meyer Topco LLC 1,500 AVEX Aviation Holdings, LLC 1,474 ATS Operating, LLC 1,440 RTIC Subsidiary Holdings, LLC 1,370 American Health Staffing Group, Inc. 1,333 Evergreen North America Acquisitions, LLC 1,313 Project Eagle Holdings, LLC 1,250 Gamber-Johnson Holdings, LLC 1,200 GS HVAM Intermediate, LLC 1,136 AB Centers Acquisition Corporation 1,112 KMS, LLC 1,086 Wahoo Fitness Acquisition L.L.C. 1,000 Eastern Wholesale Fence LLC 967 RA Outdoors LLC 894 Orttech Holdings, LLC 800 Mystic Logistics Holdings, LLC 800 Project BarFly, LLC 760 DTE Enterprises, LLC 750 Jensen Jewelers of Idaho, LLC 500 Jackmont Hospitality, Inc. 400 Clad-Rex Steel, LLC 400 Wall Street Prep, Inc. 400 Gulf Publishing Holdings, LLC 400 Flame King Holdings, LLC 400 Adams Publishing Group, LLC 394 Invincible Boat Company, LLC. 353 ASC Interests, LLC 300 AAC Holdings, Inc. 240 Acousti Engineering Company of Florida 53 Acumera, Inc. 15 Interface Security Systems, L.L.C 1 Total Loan Commitments 228,660 Total Commitments $ 255,283 ____________________ (1) This table excludes commitments related to six additional Other Portfolio investments for which the investment period has expired and remaining commitments may only be drawn to pay fund expenses. The Company does not expect any material future capital to be called on its commitment to these investments and as a result has excluded those commitments from this table. (2) This table excludes commitments related to three additional Other Portfolio investments for which the investment period has expired and remaining commitments may only be drawn to pay fund expenses or for follow on investments in existing portfolio companies. The Company does not expect any material future capital to be called on its commitment to these investments to pay fund expenses, and based on representations from the fund manager, the Company does not expect any further capital will be called on its commitment for follow on investments. As a result, the Company has excluded those commitments from this table. Main Street will fund its unfunded commitments from the same sources it uses to fund its investment commitments that are funded at the time they are made (which are typically through existing cash and cash equivalents and borrowings under the Credit Facilities). Main Street follows a process to manage its liquidity and ensure that it has available capital to fund its unfunded commitments as necessary. The Company had no unrealized appreciation or depreciation on the outstanding unfunded commitments as of March 31, 2023. Main Street may, from time to time, be involved in litigation arising out of its operations in the normal course of business or otherwise. Furthermore, third parties may try to impose liability on Main Street in connection with the activities of its portfolio companies. While the outcome of any current legal proceedings cannot at this time be predicted with certainty, Main Street does not expect any current matters will materially affect its financial condition or results of operations; however, there can be no assurance whether any pending legal proceedings will have a material adverse effect on Main Street’s financial condition or results of operations in any future reporting period.

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	3 Months Ended
	Mar. 31, 2023
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	RELATED PARTY TRANSACTIONS As discussed further in Note D — External Investment Manager , the External Investment Manager is treated as a wholly-owned portfolio company of Main Street and is included as part of Main Street’s Investment Portfolio. At March 31, 2023, Main Street had a receivable of $9.4 million due from the External Investment Manager, which included (i) $6.3 million related primarily to operating expenses incurred by Main Street as required to support the External Investment Manager’s business and amounts due from the External Investment Manager to Main Street under a tax sharing agreement (see further discussion in Note D — External Investment Manager ) and (ii) $3.1 million of dividends declared but not paid by the External Investment Manager. MSCC has entered into an agreement with the External Investment Manager to share employees in connection with its asset management business generally, and specifically for the External Investment Manager’s relationship with MSC Income and its other clients (see further discussion in Note A.1 — Organization and Basis of Presentation — Organization and Note D — External Investment Manager ). From time to time, Main Street may make investments in clients of the External Investment Manager in the form of debt or equity capital on terms approved by Main Street’s Board of Directors. In May 2022, Main Street purchased 94,697 shares of common stock of MSC Income from MSC Income at the price shares were purchased by MSC Income stockholders pursuant to MSC Income’s dividend reinvestment plan for its May dividend on such date. Main Street’s purchase of MSC Income common stock was unanimously approved by the Board of Directors and MSC Income’s board of directors, including each director who is not an “interested person,” as such term is defined in Section 2(a)(19) of the 1940 Act, of each board. As of March 31, 2023, Main Street owned 94,697 shares of MSC Income. In addition, certain of Main Street’s officers and employees own shares of MSC Income and therefore have direct pecuniary interests in MSC Income. In December 2020, the External Investment Manager entered into an Investment Management Agreement with the Private Loan Fund to provide investment advisory and management services in exchange for an asset-based fee and certain incentive fees. The Private Loan Fund is a private investment fund exempt from registration under the 1940 Act that co-invests with Main Street in Main Street’s Private Loan investment strategy. In connection with the Private Loan Fund’s initial closing in December 2020, Main Street committed to contribute up to $10.0 million as a limited partner and is entitled to distributions on such interest. In February 2022, Main Street increased its total commitment to the Private Loan Fund from $10.0 million to $15.0 million. In addition, certain of Main Street’s officers and employees (and certain of their immediate family members) have made capital commitments to the Private Loan Fund as limited partners and therefore have direct pecuniary interests in the Private Loan Fund. As of March 31, 2023, Main Street has funded $14.3 million of its limited partner commitment and Main Street’s unfunded commitment was $0.7 million . Main Street’s limited partner commitment to the Private Loan Fund was unanimously approved by the Board of Directors, including each director who is not an “interested person,” as such term is defined in Section 2(a)(19) of the 1940 Act. Additionally, Main Street provided the Private Loan Fund with a revolving line of credit pursuant to an Unsecured Revolving Promissory Note, dated February 5, 2021 and was subsequently amended on November 30, 2021 and on December 29, 2021 (as amended, the “PL Fund 2021 Note”), in an aggregate amount equal to the amount of limited partner capital commitments to the Private Loan Fund up to $85.0 million. Borrowings under the PL Fund 2021 Note bore interest at a fixed rate of 5.00% per annum and matured on February 28, 2022. The PL Fund 2021 Note was unanimously approved by Main Street’s Board of Directors, including each director who is not an “interested person,” as such term is defined in Section 2(a)(19) of the 1940 Act. In February 2022, the Private Loan Fund fully repaid all borrowings outstanding under the PL Fund 2021 Note and the PL Fund 2021 Note was extinguished. In March 2022, Main Street provided the Private Loan Fund with a revolving line of credit pursuant to a Secured Revolving Promissory Note, dated March 17, 2022 (the “PL Fund 2022 Note”), which provides for borrowings up to $10.0 million. Borrowings under the PL Fund 2022 Note bear interest at a fixed rate of 5.00% per annum and mature on the date upon which the Private Loan Fund’s investment period concludes, which is scheduled to occur in March 2026. Available borrowings under the PL Fund 2022 Note are subject to a 0.25% non-use fee. The PL Fund 2022 Note was unanimously approved by Main Street’s Board of Directors, including each director who is not an “interested person,” as such term is defined in Section 2(a)(19) of the 1940 Act. As of March 31, 2023, there were no borrowings outstanding under the PL Fund 2022 Note. In November 2015, Main Street’s Board of Directors approved and adopted the Main Street Capital Corporation Deferred Compensation Plan (the “2015 Deferred Compensation Plan”). The 2015 Deferred Compensation Plan became effective on January 1, 2016 and replaced the Deferred Compensation Plan for Non-Employee Directors previously adopted by the Board of Directors in June 2013 (the “2013 Deferred Compensation Plan”). Under the 2015 Deferred Compensation Plan, non-employee directors and certain key employees may defer receipt of some or all of their cash compensation and directors’ fees, subject to certain limitations. Individuals participating in the 2015 Deferred Compensation Plan receive distributions of their respective balances based on predetermined payout schedules or other events as defined by the plan and are also able to direct investments made on their behalf among investment alternatives permitted from time to time under the plan, including phantom Main Street stock units. As of March 31, 2023, $17.2 million of compensation, plus net unrealized gains and losses and investment income, and minus previous distributions, was deferred under the 2015 Deferred Compensation Plan (including amounts previously deferred under the 2013 Deferred Compensation Plan). Of this amount, $6.2 million is deferred into phantom Main Street stock units, representing 156,122 shares of Main Street’s common stock. Any amounts deferred under the plan represented by phantom Main Street stock units will not be issued or included as outstanding on the Consolidated Statements of Changes in Net Assets until such shares are actually distributed to the participant in accordance with the plan, but the related phantom stock units are included in weighted-average shares outstanding with the related dollar amount of the deferral included in total expenses in Main Street’s Consolidated Statements of Operations as the deferred fees represented by such phantom stock units are earned over the service period. The dividend amounts related to additional phantom stock units are included in the Consolidated Statements of Changes in Net Assets as an increase to dividends to stockholders offset by a corresponding increase to additional paid-in capital .

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	3 Months Ended
	Mar. 31, 2023
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS In May 2023, Main Street declared a supplemental cash dividend of $0.225 per share payable in June 2023. This supplemental cash dividend is in addition to the previously announced regular monthly cash dividends that Main Street declared for the second quarter of 2023 of $0.225 per share for each of April, May and June 2023. In May 2023, Main Street also declared regular monthly dividends of $0.23 per share for each month of July, August and September of 2023. These regular monthly dividends equal a total of $0.69 per share for the third quarter of 2023, representing a 7.0% increase from the regular monthly dividends paid in the third quarter of 2022. Including the regular monthly and supplemental dividends declared for the second and third quarters of 2023, Main Street will have paid $37.56 per share in cumulative dividends since its October 2007 initial public offering.

Consolidated Schedule of Inve_3

Consolidated Schedule of Investments In and Advances to Affiliates	3 Months Ended
	Mar. 31, 2023
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Consolidated Schedule of Investments In and Advances to Affiliates	Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross March 31, Majority-owned investments ASK (Analytical Systems Keco Holdings, LLC) L+ 10.00% Secured Debt (8) $ — $ — $ 1 $ (3) $ 1 $ — $ (2) 14.75% L+ 10.00% Secured Debt (8) — — 188 4,545 20 70 4,495 14.13% Preferred Member Units (8) — — — — — — — Preferred Member Units (8) — 84 — 3,504 84 — 3,588 Warrants (8) — — — — — — — Brewer Crane Holdings, LLC 14.66% L+ 10.00% Secured Debt (9) — — 212 5,964 — 124 5,840 Preferred Member Units (9) — (520) 30 7,080 — 520 6,560 Café Brazil, LLC Member Units (8) — (370) 16 2,210 — 370 1,840 California Splendor Holdings LLC 14.88% L+ 10.00% Secured Debt (9) — (3) 1,045 28,000 3 3 28,000 Preferred Member Units (9) — — 63 25,495 — — 25,495 15.00% 15.00% Preferred Member Units (9) — — 150 3,994 150 — 4,144 Clad-Rex Steel, LLC SF+ 9.00% Secured Debt (5) — — 1 — — — — 13.79% SF+ 9.00% Secured Debt (5) — — 369 10,440 11 480 9,971 10.00% Secured Debt (5) — — 26 1,039 — 8 1,031 Member Units (5) — (1,050) 50 8,220 — 1,050 7,170 Member Units (5) — 220 — 610 220 — 830 CMS Minerals Investments Member Units (9) — (431) 44 1,670 — 435 1,235 Cody Pools, Inc. 15.50% L+ 10.50% Secured Debt (8) — 11 59 1,462 13 421 1,054 15.50% L+ 10.50% Secured Debt (8) — (20) 1,577 40,801 20 444 40,377 Preferred Member Units (8) — 970 29 58,180 970 — 59,150 CompareNetworks Topco, LLC L+ 9.00% Secured Debt (9) — — — — — — — 13.75% L+ 9.00% Secured Debt (9) — (3) 180 5,241 3 375 4,869 Preferred Member Units (9) — (1,390) 158 19,830 — 1,390 18,440 Datacom, LLC 7.50% Secured Debt (8) — — 4 223 227 — 450 10.00% Secured Debt (8) — — 254 7,789 39 67 7,761 Preferred Member Units (8) — — — 2,670 — — 2,670 Direct Marketing Solutions, Inc. Secured Debt (9) — (7) 11 — 7 7 — 14.00% Secured Debt (9) — (14) 959 27,267 14 405 26,876 Preferred Stock (9) — (520) 171 22,220 — 520 21,700 Elgin AcquireCo, LLC SF+ 6.00% Secured Debt (5) — — 2 (9) 1 — (8) 12.00% Secured Debt (5) — — 573 18,594 10 — 18,604 9.00% Secured Debt (5) — — 144 6,294 1 11 6,284 Common Stock (5) — — — 7,603 — — 7,603 Common Stock (5) — — — 1,558 — — 1,558 Gamber-Johnson Holdings, LLC SF+ 8.50% Secured Debt (5) — — 2 — — — — 11.50% SF+ 8.50% Secured Debt (5) — (24) 1,852 64,078 24 824 63,278 Member Units (5) — 8,480 1,567 50,890 8,480 — 59,370 GRT Rubber Technologies LLC 10.66% L+ 6.00% Secured Debt (8) — — 28 670 295 — 965 12.66% L+ 8.00% Secured Debt (8) — (12) 1,280 40,493 12 12 40,493 Member Units (8) — — 42 44,440 — — 44,440 Gulf Publishing Holdings, LLC L+ 9.50% Secured Debt (8) — — — — — — — Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross March 31, 12.50% Secured Debt (8) — — 75 2,284 — — 2,284 Preferred Equity (8) — — — 3,780 — — 3,780 Member Units (8) — — — — — — — Jensen Jewelers of Idaho, LLC P+ 6.75% Secured Debt (9) — — — — — — — 14.50% P+ 6.75% Secured Debt (9) — (2) 90 2,450 2 2 2,450 Member Units (9) — (120) 129 14,970 — 120 14,850 Kickhaefer Manufacturing Company, LLC 12.00% Secured Debt (5) — — 780 20,374 192 — 20,566 9.00% Secured Debt (5) — — 88 3,842 — 9 3,833 Preferred Equity (5) — — — 7,220 — — 7,220 Member Units (5) — (70) 29 2,850 — 70 2,780 Market Force Information, LLC 15.75% L+ 11.00% Secured Debt (9) — (6,725) 260 6,090 635 6,725 — 12.00% 12.00% Secured Debt (9) — (1,610) — 1,610 — 1,610 — Member Units (9) — — — — — — — MetalForming AcquireCo, LLC Secured Debt (7) — — 3 — — — — 12.75% Secured Debt (7) — — 739 23,576 12 — 23,588 8.00% 8.00% Preferred Equity (7) — — 148 6,010 117 — 6,127 Common Stock (7) — — 327 1,537 — — 1,537 MH Corbin Holding LLC 13.00% Secured Debt (5) — 952 196 4,548 952 116 5,384 Preferred Member Units (5) — — — — — — — Preferred Member Units (5) — — — — — — — MSC Adviser I, LLC Member Units (8) — 9,720 3,057 122,930 9,720 — 132,650 Mystic Logistics Holdings, LLC Secured Debt (6) — — 1 — — — — 10.00% Secured Debt (6) — — 144 5,746 — — 5,746 Common Stock (6) — 2,180 992 22,830 2,180 — 25,010 OMi Topco, LLC 12.00% Secured Debt (8) — (13) 485 15,750 13 763 15,000 Preferred Member Units (8) — 2,290 675 22,810 2,290 — 25,100 PPL RVs, Inc. L+ 7.00% Secured Debt (8) — — — — — — — 11.38% L+ 7.00% Secured Debt (8) — (13) 629 21,655 13 13 21,655 Common Stock (8) — — 104 18,950 — — 18,950 Common Stock (8) — (68) — 238 — 68 170 Principle Environmental, LLC Secured Debt (8) — — — — — — — 13.00% Secured Debt (8) — — 198 5,806 6 — 5,812 Preferred Member Units (8) — (1,940) 286 12,420 — 1,940 10,480 Common Stock (8) — (90) — 590 — 90 500 Quality Lease Service, LLC Member Units (7) — — — 525 — — 525 Robbins Bros. Jewelry, Inc. Secured Debt (9) — — 8 (35) 2 — (33) 12.50% Secured Debt (9) — — 1,128 35,404 19 225 35,198 Preferred Equity (9) — (4,950) — 14,880 — 4,950 9,930 Trantech Radiator Topco, LLC Secured Debt (7) — (1) 2 — 1 1 — 12.00% Secured Debt (7) — (5) 242 7,920 5 5 7,920 Common Stock (7) — 1,510 29 7,800 1,506 — 9,306 Volusion, LLC 10.00% Secured Debt (8) — — — — 2,100 — 2,100 Secured Debt (8) (3,188) 1,821 166 14,914 — 14,914 — Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross March 31, Unsecured Convertible Debt (8) (409) 409 — — 409 409 — Preferred Member Units (8) — — — — — — — Preferred Member Units (8) — — — — 11,446 — 11,446 Preferred Member Units (8) — — — — — — — Common Stock (8) — (2,576) — — 2,576 2,576 — Warrants (8) — 2,576 — — — — — Ziegler’s NYPD, LLC 12.00% Secured Debt (8) — — 14 450 — — 450 6.50% Secured Debt (8) — — 16 945 — — 945 14.00% Secured Debt (8) — (215) 96 2,676 — 215 2,461 Preferred Member Units (8) — (170) — 240 — 170 70 Warrants (8) — — — — — — — Other controlled investments 2717 MH, L.P. LP Interests (2717 MH, L.P.) (8) 631 (675) 141 7,552 1,031 1,574 7,009 LP Interests (2717 HPP-MS, L.P.) (8) — — — 248 — — 248 ASC Interests, LLC 13.00% Secured Debt (8) — — 13 400 — — 400 13.00% Secured Debt (8) — — 54 1,649 — — 1,649 Member Units (8) — (100) — 800 — 100 700 ATS Workholding, LLC 5.00% Secured Debt (9) — (132) — 634 21 132 523 5.00% Secured Debt (9) — (186) — 1,005 — 185 820 Preferred Member Units (9) — — — — — — — Barfly Ventures, LLC 7.00% Secured Debt (5) — — 30 711 — — 711 Member Units (5) — (280) — 3,320 — 283 3,037 Batjer TopCo, LLC Secured Debt (8) — — — (8) 1 — (7) Secured Debt (8) — — — — — — — 11.00% Secured Debt (8) — — 311 10,933 9 450 10,492 Preferred Stock (8) — 2,055 167 4,095 2,055 — 6,150 Bolder Panther Group, LLC Secured Debt (9) — — 1 — — — — 13.91% SF+ 9.22% Secured Debt (9) — (36) 3,431 99,194 36 695 98,535 8.00% Class B Preferred Member Units (9) — — 1,096 31,420 — — 31,420 Bridge Capital Solutions Corporation 13.00% Secured Debt (6) — — 286 8,813 — — 8,813 13.00% Secured Debt (6) — — 32 1,000 — — 1,000 Preferred Member Units (6) — — 25 1,000 — — 1,000 Warrants (6) — — — 1,828 — — 1,828 Warrants (6) — — — 2,512 — — 2,512 CBT Nuggets, LLC Member Units (9) — 860 1,235 49,002 858 — 49,860 Centre Technologies Holdings, LLC L+ 9.00% Secured Debt (8) — — 3 — — — — 13.75% L+ 9.00% Secured Debt (8) — — 517 14,954 6 — 14,960 Preferred Member Units (8) — 560 30 8,700 560 — 9,260 Chamberlin Holding LLC SF+ 6.00% Secured Debt (8) — — 2 — — — — 12.86% SF+ 8.00% Secured Debt (8) — (6) 540 16,945 6 6 16,945 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross March 31, Member Units (8) — (120) 285 22,920 — 120 22,800 Member Units (8) — 120 23 2,710 120 — 2,830 Charps, LLC 10.00% Unsecured Debt (5) — (9) 149 5,694 9 9 5,694 Preferred Member Units (5) — 210 196 13,340 210 — 13,550 Colonial Electric Company LLC Secured Debt (6) — — 2 — — — — 12.00% Secured Debt (6) — — 704 23,151 14 315 22,850 Preferred Member Units (6) — (960) (1,273) 9,160 — 960 8,200 Copper Trail Energy Fund I, LP - CTMH LP Interests (CTMH, LP) (9) — — — 588 — — 588 Digital Products Holdings LLC 14.75% L+ 10.00% Secured Debt (5) — — 564 15,523 9 329 15,203 Preferred Member Units (5) — — 50 9,835 — — 9,835 Garreco, LLC 12.00% L+ 10.00% Secured Debt (8) — — 112 3,826 — 277 3,549 Member Units (8) — (220) 12 1,800 — 220 1,580 Gulf Manufacturing, LLC Member Units (8) — 580 718 6,790 580 — 7,370 Harrison Hydra-Gen, Ltd. Common Stock (8) — 210 — 3,280 210 — 3,490 Johnson Downie Opco, LLC L+ 11.50% Secured Debt (8) — (1) 3 — 1 1 — 16.25% L+ 11.50% Secured Debt (8) — (5) 407 9,999 5 5 9,999 Preferred Equity (8) — 1,010 71 5,540 1,010 — 6,550 JorVet Holdings, LLC 12.00% Secured Debt (9) — — 782 25,432 13 — 25,445 Preferred Equity (9) — — 221 10,741 — — 10,741 KBK Industries, LLC 10.00% Secured Debt (5) — 56 184 — 6,000 250 5,750 Member Units (5) — (3,590) 6,134 15,570 — 3,590 11,980 MS Private Loan Fund Secured Debt (8) — — 6 — — — — Secured Debt (8) — — — — — — — LP Interests (8) — (58) 370 14,833 — 58 14,775 MSC Income Fund, Inc. Common Equity (8) — 7 15 753 7 — 760 NAPCO Precast, LLC Member Units (8) — 670 — 11,830 670 — 12,500 Nebraska Vet AcquireCo, LLC (NVS) L+ 7.00% Secured Debt (5) — — 2 — — — — 12.00% Secured Debt (5) — (10) 613 20,094 10 10 20,094 12.00% Secured Debt (5) — (5) 320 10,500 5 5 10,500 Preferred Member Units (5) — 3,520 125 7,700 3,520 — 11,220 NexRev LLC Secured Debt (8) — — — — — — — 11.00% Secured Debt (8) — 1,000 320 8,477 1,022 629 8,870 Preferred Member Units (8) — 1,880 131 1,110 1,880 — 2,990 NRP Jones, LLC 12.00% Secured Debt (5) — — 62 2,080 — — 2,080 Member Units (5) — 279 13 4,615 278 — 4,893 Member Units (5) — 11 (2) 175 12 — 187 NuStep, LLC 11.25% L+ 6.50% Secured Debt (5) — — 122 4,399 — — 4,399 12.00% Secured Debt (5) — — 556 18,414 3 — 18,417 Preferred Member Units (5) — (410) — 8,040 — 410 7,630 Preferred Member Units (5) — — — 5,150 — — 5,150 Orttech Holdings, LLC L+ 11.00% Secured Debt (5) — — — — — — — 15.75% L+ 11.00% Secured Debt (5) — — 924 23,429 17 800 22,646 Preferred Stock (5) — 1,750 269 11,750 1,750 — 13,500 Pearl Meyer Topco LLC 12.00% Secured Debt (6) — 5 29 — 3,500 — 3,500 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross March 31, 12.00% Secured Debt (6) — 38 142 — 11,500 — 11,500 12.00% Secured Debt (6) — (20) 868 28,681 20 1,020 27,681 Preferred Equity (6) — 280 2,879 43,260 280 — 43,540 River Aggregates, LLC Member Units (8) — — — 3,620 — — 3,620 Tedder Industries, LLC 12.00% Secured Debt (9) — — 55 1,840 — — 1,840 12.00% Secured Debt (9) — — 459 15,120 3 — 15,123 Preferred Member Units (9) — (810) — 7,681 — 810 6,871 Preferred Member Units (9) — 111 — — 333 — 333 Televerde, LLC Member Units (8) — 1,191 171 5,408 1,191 — 6,599 Preferred Stock (8) — — — 1,794 — — 1,794 Vision Interests, Inc. Series A Preferred Stock (9) — — 168 3,000 — — 3,000 VVS Holdco LLC L+ 6.00% Secured Debt (5) — — 8 (21) 6 — (15) 11.50% Secured Debt (5) — — 889 30,161 15 — 30,176 Preferred Equity (5) — 100 38 11,940 100 — 12,040 — — — — — — — — — — — — — — Other — — — — — — — Amounts related to investments transferred to or from other 1940 Act classification during the period — — (171) (14,914) — — — Total Control investments $ (2,966) $ 17,161 $ 48,862 $ 1,703,172 $ 83,687 $ 55,770 $ 1,746,003 Affiliate Investments AAC Holdings, Inc. 18.00% Secured Debt (7) $ — $ (6) $ — $ — $ 315 $ 6 $ 309 18.00% 18.00% Secured Debt (7) — (268) 572 11,550 572 267 11,855 Common Stock (7) — — — — — — — Warrants (7) — — — — — — — AFG Capital Group, LLC Preferred Member Units (8) — — — 9,400 — — 9,400 ATX Networks Corp. L+ 7.50% Secured Debt (6) — (134) 886 6,343 575 6,918 — 10.00% Unsecured Debt (6) — (306) 1,160 2,598 1,160 3,758 — Common Stock (6) 3,248 (3,270) — 3,270 3,248 6,518 — BBB Tank Services, LLC 15.66% L+ 11.00% Unsecured Debt (8) — — 31 800 — — 800 15.66% L+ 11.00% Unsecured Debt (8) — — 155 2,086 — — 2,086 Member Units (8) — — — — — — — 15.00% Preferred Stock (non-voting) (8) — — — — — — — Boccella Precast Products LLC 10.00% Secured Debt (6) — — 8 320 — — 320 Member Units (6) — (200) 29 2,970 — 200 2,770 Buca C, LLC 12.00% Secured Debt (7) — — 521 12,337 — 375 11,962 6.00% 6.00% Preferred Member Units (7) — — — — — — — Career Team Holdings, LLC L+ 6.00% Secured Debt (6) — — 2 (9) 1 1 (9) 12.50% Secured Debt (6) — — 643 20,090 10 — 20,100 Common Stock (6) — — — 4,500 — — 4,500 Chandler Signs Holdings, LLC Class A Units (8) — 210 36 1,790 210 — 2,000 Classic H&G Holdings, LLC 10.88% L+ 6.00% Secured Debt (6) — — 127 4,560 — — 4,560 8.00% Secured Debt (6) — (11) 396 19,274 11 11 19,274 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross March 31, Preferred Member Units (6) — 1,062 780 24,637 1,063 — 25,700 Congruent Credit Opportunities Funds LP Interests (Congruent Credit Opportunities Fund III, LP) (8) — — 123 7,657 — 876 6,781 DMA Industries, LLC 12.00% Secured Debt (7) — (11) 647 21,200 11 11 21,200 Preferred Equity (7) — — — 7,260 — — 7,260 Dos Rios Partners LP Interests (Dos Rios Partners, LP) (8) — 156 — 9,127 156 — 9,283 LP Interests (Dos Rios Partners - A, LP) (8) — — — 2,898 — — 2,898 Dos Rios Stone Products LLC Class A Preferred Units (8) — 250 — 1,330 250 — 1,580 EIG Fund Investments LP Interests (EIG Global Private Debt Fund-A, L.P.) (8) 14 — 19 1,013 15 52 976 Flame King Holdings, LLC 11.25% L+ 6.50% Secured Debt (9) — (4) 215 7,600 4 4 7,600 13.75% L+ 9.00% Secured Debt (9) — (11) 730 21,200 11 11 21,200 Preferred Equity (9) — 3,610 538 17,580 3,610 — 21,190 Freeport Financial SBIC Fund LP LP Interests (Freeport Financial SBIC Fund LP) (5) — — — 3,483 — — 3,483 LP Interests (Freeport First Lien Loan Fund III LP) (5) — — 134 5,848 — 536 5,312 GFG Group, LLC. 9.00% Secured Debt (5) — (6) 261 11,345 6 6 11,345 Preferred Member Units (5) — 450 39 7,140 450 — 7,590 Hawk Ridge Systems, LLC 10.75% L+ 6.00% Secured Debt (9) — — 90 3,185 815 — 4,000 10.00% Secured Debt (9) — (10) 893 37,800 10 10 37,800 Preferred Member Units (9) — — 65 17,460 — — 17,460 Preferred Member Units (9) — — — 920 — — 920 Houston Plating and Coatings, LLC 8.00% Unsecured Convertible Debt (8) — (170) 60 3,000 — 170 2,830 Member Units (8) — 600 2 2,400 600 — 3,000 HPEP 3, L.P. LP Interests (HPEP 3, L.P.) (8) — 113 — 4,331 113 508 3,936 LP Interests (HPEP 4, L.P.) (8) — — — 2,332 — — 2,332 LP Interests (423 COR, LP) (8) — — 117 1,400 — — 1,400 I-45 SLF LLC Member Units (Fully diluted 20.0%; 21.75% profits interest) (8) — — 528 11,758 1,200 — 12,958 Infinity X1 Holdings, LLC 13.00% Secured Debt (9) — — 183 — 17,823 — 17,823 Preferred Equity (9) — — — — 4,000 — 4,000 Iron-Main Investments, LLC 13.50% Secured Debt (5) — — 151 4,500 2 — 4,502 13.50% Secured Debt (5) — — 105 3,130 2 — 3,132 13.50% Secured Debt (5) — — 294 8,944 — — 8,944 13.50% Secured Debt (5) — — 658 19,559 9 — 19,568 13.50% Secured Debt (5) — — 489 — 10,836 — 10,836 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross March 31, Common Stock (5) — — — 1,798 958 — 2,756 OnAsset Intelligence, Inc. 12.00% 12.00% Secured Debt (8) — (6) — 569 — 6 563 12.00% 12.00% Secured Debt (8) — (6) — 580 — 6 574 12.00% 12.00% Secured Debt (8) — (14) — 1,249 — 13 1,236 12.00% 12.00% Secured Debt (8) — (28) — 2,606 — 29 2,577 10.00% 10.00% Unsecured Debt (8) — — — 305 — — 305 7.00% 7.00% Preferred Stock (8) — — — — — — — Common Stock (8) — — — — — — — Warrants (8) — — — — — — — Oneliance, LLC L+ 11.00% Secured Debt (7) — — — — — — — 15.75% L+ 11.00% Secured Debt (7) — — 219 5,559 3 80 5,482 Preferred Stock (7) — — — 1,056 — — 1,056 Rocaceia, LLC (Quality Lease and Rental Holdings, LLC) Secured Debt (8) (29,526) 29,865 — — 29,865 29,865 — Preferred Member Units (8) — — — — — — — SI East, LLC (Stavig) Secured Debt (7) — — 7 — — — — 9.50% Secured Debt (7) — (33) 2,144 89,786 33 5,283 84,536 Preferred Member Units (7) — — 343 13,650 — — 13,650 Slick Innovations, LLC 14.00% Secured Debt (6) — (9) 492 13,840 9 249 13,600 Common Stock (6) — 260 — 1,530 260 — 1,790 Sonic Systems International, LLC 12.26% L+ 7.50% Secured Debt (8) — (17) 499 15,769 17 17 15,769 Common Stock (8) — (50) 11 1,280 — 50 1,230 Student Resource Center, LLC 13.69% L+ 8.50% Secured Debt (6) — — 108 4,556 — — 4,556 Preferred Equity (6) — — — — — — — Superior Rigging & Erecting Co. 12.00% Secured Debt (7) — — 652 21,378 17 1,000 20,395 Preferred Member Units (7) — 470 — 4,500 470 — 4,970 The Affiliati Network, LLC Secured Debt (9) — — 7 106 1,321 1,440 (13) 12.00% Secured Debt (9) — — 293 9,442 7 200 9,249 Preferred Stock (9) — — 80 6,400 — — 6,400 UnionRock Energy Fund II, LP LP Interests (9) — — — 5,855 530 197 6,188 UniTek Global Services, Inc. 14.22% SF+ 7.50% 2.00% Secured Debt (6) — 23 12 382 25 — 407 14.22% SF+ 7.50% 2.00% Secured Debt (6) — 102 62 1,712 112 3 1,821 15.00% 15.00% Secured Convertible Debt (6) — 262 91 4,592 353 — 4,945 20.00% 20.00% Preferred Stock (6) — (107) 107 2,833 107 107 2,833 20.00% 20.00% Preferred Stock (6) — 385 — 1,991 385 — 2,376 19.00% 19.00% Preferred Stock (6) — — — — — — — 13.50% 13.50% Preferred Stock (6) — — — — — — — Common Stock (6) — — — — — — — Universal Wellhead Services Holdings, LLC 14.00% 14.00% Preferred Member Units (8) — — — 220 — 2 218 Member Units (8) — — — — — — — World Micro Holdings, LLC 13.00% Secured Debt (7) — — 471 14,140 7 — 14,147 Preferred Equity (7) — — — 3,845 — — 3,845 Other — — — — — — — Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross March 31, Amounts related to investments transferred to or from other 1940 Act classification during the period — — 171 14,914 — — — Total Affiliate investments $ (26,264) $ 33,141 $ 17,456 $ 618,359 $ 81,567 $ 58,785 $ 626,227 ____________________ (1) The principal amount, the ownership detail for equity investments and if the investment is income producing is included in the Consolidated Schedule of Investments included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q. (2) Represents the total amount of interest, fees and dividends credited to income for the portion of the period for which an investment was included in Control or Affiliate categories, respectively. For investments transferred between Control and Affiliate categories during the period, any income or investment balances related to the time period it was in the category other than the one shown at period end is included in “Amounts related to investments transferred from other 1940 Act classifications during the period.” (3) Gross additions include increases in the cost basis of investments resulting from new portfolio investments, follow-on investments and accrued PIK interest, and the exchange of one or more existing securities for one or more new securities. Gross additions also include net increases in unrealized appreciation or net decreases in net unrealized depreciation as well as the movement of an existing portfolio company into this category and out of a different category. (4) Gross reductions include decreases in the cost basis of investments resulting from principal repayments or sales and the exchange of one or more existing securities for one or more new securities. Gross reductions also include net increases in net unrealized depreciation or net decreases in unrealized appreciation as well as the movement of an existing portfolio company out of this category and into a different category. (5) Portfolio company located in the Midwest region as determined by location of the corporate headquarters. The fair value as of March 31, 2023 for control investments located in this region was $444,151. This represented 25.4% of net assets as of March 31, 2023. The fair value as of March 31, 2023 for affiliate investments located in this region was $77,468. This represented 12.4% of net assets as of March 31, 2023. (6) Portfolio company located in the Northeast region and Canada as determined by location of the corporate headquarters. The fair value as of March 31, 2023 for control investments located in this region was $163,180. This represented 9.3% of net assets as of March 31, 2023. The fair value as of March 31, 2023 for affiliate investments located in this region was $109,543. This represented 17.5% of net assets as of March 31, 2023. (7) Portfolio company located in the Southeast region as determined by location of the corporate headquarters. The fair value as of March 31, 2023 for control investments located in this region was $49,003. This represented 2.8% of net assets as of March 31, 2023. The fair value as of March 31, 2023 for affiliate investments located in this region was $200,667. This represented 32.0% of net assets as of March 31, 2023. (8) Portfolio company located in the Southwest region as determined by location of the corporate headquarters. The fair value as of March 31, 2023 for control investments located in this region was $639,016. This represented 36.6% of net assets as of March 31, 2023. The fair value as of March 31, 2023 for affiliate investments located in this region was $84,732. This represented 13.5% of net assets as of March 31, 2023. (9) Portfolio company located in the West region as determined by location of the corporate headquarters. The fair value as of March 31, 2023 for control investments located in this region was $450,653. This represented 25.8% of net assets as of March 31, 2023. The fair value as of March 31, 2023 for affiliate investments located in this region was $153,817. This represented 24.6% of net assets as of March 31, 2023. (10) All of the Company’s portfolio investments are generally subject to restrictions on resale as “restricted securities,” unless otherwise noted. (11) This schedule should be read in conjunction with the Consolidated Schedule of Investments and Notes to the Consolidated Financial Statements included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q. Supplemental information can be located within the Consolidated Schedule of Investments including end of period interest rate, preferred dividend rate, maturity date, investments not paid currently in cash and investments whose value was determined using significant unobservable inputs. (12) Investment has an unfunded commitment as of March 31, 2023 (see Note K ). The fair value of the investment includes the impact of the fair value of any unfunded commitments. (13) Negative fair value is the result of the capitalized discount being greater than the principal amount outstanding on the loan. ________________ (1) The principal amount, the ownership detail for equity investments and if the investment is income producing is included in the Consolidated Schedule of Investments included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q. (2) Represents the total amount of interest, fees and dividends credited to income for the portion of the period for which an investment was included in Control or Affiliate categories, respectively. For investments transferred between Control and Affiliate categories during the period, any income or investment balances related to the time period it was in the category other than the one shown at period end is included in “Amounts from investments transferred from other 1940 Act classifications during the period.” (3) Gross additions include increases in the cost basis of investments resulting from new portfolio investments, follow-on investments and accrued PIK interest, and the exchange of one or more existing securities for one or more new securities. Gross additions also include net increases in unrealized appreciation or net decreases in net unrealized depreciation as well as the movement of an existing portfolio company into this category and out of a different category. (4) Gross reductions include decreases in the cost basis of investments resulting from principal repayments or sales and the exchange of one or more existing securities for one or more new securities. Gross reductions also include net increases in net unrealized depreciation or net decreases in unrealized appreciation as well as the movement of an existing portfolio company out of this category and into a different category. (5) Portfolio company located in the Midwest region as determined by location of the corporate headquarters. The fair value as of March 31, 2022 for control investments located in this region was $338,390. This represented 22.8% of net assets as of March 31, 2022. The fair value as of March 31, 2022 for affiliate investments located in this region was $69,637. This represented 12.4% of net assets as of March 31, 2022. (6) Portfolio company located in the Northeast region as determined by location of the corporate headquarters. The fair value as of March 31, 2022 for control investments located in this region was $134,636. This represented 9.1% of net assets as of March 31, 2022. The fair value as of March 31, 2022 for affiliate investments located in this region was $100,269. This represented 17.9% of net assets as of March 31, 2022. (7) Portfolio company located in the Southeast region as determined by location of the corporate headquarters. The fair value as of March 31, 2022 for control investments located in this region was $18,443. This represented 1.2% of net assets as of March 31, 2022. The fair value as of March 31, 2022 for affiliate investments located in this region was $165,903. This represented 29.7% of net assets as of March 31, 2022. (8) Portfolio company located in the Southwest region as determined by location of the corporate headquarters. The fair value as of March 31, 2022 for control investments located in this region was $587,631. This represented 39.5% of net assets as of March 31, 2022. The fair value as of March 31, 2022 for affiliate investments located in this region was $107,324. This represented 19.2% of net assets as of March 31, 2022. (9) Portfolio company located in the West region as determined by location of the corporate headquarters. The fair value as of March 31, 2022 for control investments located in this region was $407,563. This represented 27.4% of net assets as of March 31, 2022. The fair value as of March 31, 2022 for affiliate investments located in this region was $116,306. This represented 20.8% of net assets as of March 31, 2022. (10) All of the Company’s portfolio investments are generally subject to restrictions on resale as “restricted securities,” unless otherwise noted. (11) This schedule should be read in conjunction with the Consolidated Schedule of Investments and Notes to the Consolidated Financial Statements included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q. Supplemental information can be located within the Consolidated Schedule of Investments including end of period interest rate, preferred dividend rate, maturity date, investments not paid currently in cash and investments whose value was determined using significant unobservable inputs. (12) Investment has an unfunded commitment as of March 31, 2022 (see Note K ). The fair value of the investment includes the impact of the fair value of any unfunded commitments.

N-2

N-2	3 Months Ended
	Mar. 31, 2023
Cover [Abstract]
Entity Central Index Key	0001396440
Amendment Flag	false
Securities Act File Number	001-33723
Document Type	10-Q
Entity Registrant Name	Main Street Capital Corporation
Entity Address, Address Line One	1300 Post Oak Boulevard
Entity Address, Address Line Two	8th Floor
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77056
City Area Code	713
Local Phone Number	350-6000
Entity Emerging Growth Company	false
General Description of Registrant [Abstract]
Investment Objectives and Practices [Text Block]	OVERVIEW OF OUR BUSINESS Our principal investment objective is to maximize our portfolio’s total return by generating current income from our debt investments and current income and capital appreciation from our equity and equity-related investments, including warrants, convertible securities and other rights to acquire equity securities in a portfolio company. We seek to achieve our investment objective through our LMM, Private Loan (as defined below) and Middle Market investment strategies. Our LMM investment strategy involves investments in companies that generally have annual revenues between $10 million and $150 million and our LMM portfolio investments generally range in size from $5 million to $75 million. Our private loan (“Private Loan”) investment strategy involves investments in companies that are consistent with the size of the companies in our LMM and Middle Market investment strategies, and our Private Loan investments generally range in size from $10 million to $75 million. Our Middle Market investment strategy involves investments in companies that are generally larger in size than our LMM companies, with annual revenues typically between $150 million and $1.5 billion, and our Middle Market investments generally range in size from $3 million to $25 million. We seek to fill the financing gap for LMM businesses, which, historically, have had limited access to financing from commercial banks and other traditional sources. The underserved nature of the LMM creates the opportunity for us to meet the financing needs of LMM companies while also negotiating favorable transaction terms and equity participation. Our ability to invest across a company’s capital structure, from secured loans to equity securities, allows us to offer portfolio companies a comprehensive suite of financing options, or a “one stop” financing solution. Providing customized, “one-stop” financing solutions is important to LMM portfolio companies. We generally seek to partner directly with entrepreneurs, management teams and business owners in making our investments. Our LMM portfolio debt investments are generally secured by a first lien on the assets of the portfolio company and typically have a term of between five and seven years from the original investment date. Private Loan investments primarily consist of debt securities that have primarily been originated directly by us or, to a lesser extent, through our strategic relationships with other investment funds on a collaborative basis through investments that are often referred to in the debt markets as “club deals” because of the small lender group size. Our Private Loan investments are typically made to support a company owned by or in the process of being acquired by a private equity sponsor. Private Loan investments are typically similar in size, structure, terms and conditions to investments we hold in our LMM portfolio and Middle Market portfolio. Our Private Loan portfolio debt investments are generally secured by a first priority lien on the assets of the portfolio company and typically have a term of between three and seven years from the original investment date. We may also invest alongside the private equity sponsor in the equity securities of our Private Loan portfolio companies. Our Middle Market portfolio investments primarily consist of direct investments in or secondary purchases of interest-bearing syndicated loans or debt securities in privately held companies based in the United States that are generally larger in size than the companies included in our LMM portfolio. Our Middle Market portfolio debt investments are generally secured by a first priority lien on the assets of the portfolio company and typically have an expected duration of between three and seven years from the original investment date. Our other portfolio (“Other Portfolio”) investments primarily consist of investments that are not consistent with the typical profiles for our LMM, Private Loan or Middle Market portfolio investments, including investments which may be managed by third parties. In our Other Portfolio, we may incur indirect fees and expenses in connection with investments managed by third parties, such as investments in other investment companies or private funds. Subject to changes in our cash and overall liquidity, our Investment Portfolio (as defined below) may also include short-term portfolio investments that are atypical of our LMM, Private Loan and Middle Market portfolio investments in that they are intended to be a short-term deployment of capital. These assets are typically expected to be liquidated in one year or less and are not expected to be a significant portion of the overall Investment Portfolio. The “Investment Portfolio”, as used herein, refers to all of our investments in LMM companies (including both our LMM and Private Loan portfolio investments) and investments in Middle Market companies (including both our Private Loan and Middle Market portfolio investments), Other Portfolio investments and our investment in the External Investment Manager. Our external asset management business is conducted through the External Investment Manager. The External Investment Manager earns management fees based on the assets of the funds under management and may earn incentive fees, or a carried interest, based on the performance of the funds managed. Our portfolio investments are generally made through MSCC, the Taxable Subsidiaries, the Funds and the Structured Subsidiaries. MSCC, the Taxable Subsidiaries, the Funds and the Structured Subsidiaries share the same investment strategies and criteria, although they are subject to different regulatory regimes (see Regulation ). An investor’s return in MSCC will depend, in part, on the Taxable Subsidiaries’, the Funds’ and the Structured Subsidiaries’ investment returns as they are wholly-owned subsidiaries of MSCC. The level of new portfolio investment activity will fluctuate from period to period based upon our view of the current economic fundamentals, our ability to identify new investment opportunities that meet our investment criteria, and our ability to consummate the identified opportunities. The level of new investment activity, and associated interest and fee income, will directly impact future investment income. In addition, the level of dividends paid by portfolio companies and the portion of our portfolio debt investments on non-accrual status will directly impact future investment income. While we intend to grow our portfolio and our investment income over the long term, our growth and our operating results may be more limited during depressed economic periods. However, we intend to appropriately manage our cost structure and liquidity position based on applicable economic conditions and our investment outlook. The level of realized gains or losses and unrealized appreciation or depreciation on our investments will also fluctuate depending upon portfolio activity, economic conditions and the performance of our individual portfolio companies. The changes in realized gains and losses and unrealized appreciation or depreciation could have a material impact on our operating results. Because we are internally managed, we do not pay any external investment advisory fees, but instead directly incur the operating costs associated with employing investment and portfolio management professionals. We believe that our internally managed structure provides us with a better alignment of interests between our management team and our employees and our shareholders and a beneficial operating expense structure when compared to other publicly traded and privately held investment firms which are externally managed, and our internally managed structure allows us the opportunity to leverage our non-interest operating expenses as we grow our Investment Portfolio and our External Investment Manager’s asset management business (as defined below). The ratio of our total operating expenses, excluding interest expense, as a percentage of our quarterly average total assets was 1.4% and 1.5%, for the trailing twelve months ended March 31, 2023 and 2022, respectively, and 1.4% for the year ended December 31, 2022. The ratio of our total operating expenses, including interest expense, as a percentage of our quarterly average total assets was 3.5% and 3.3% for the trailing twelve months ended March 31, 2023 and 2022, respectively, and 3.3% for the year ended December 31, 2022. Our ratio of expenses as a percentage of our average net asset value is described in greater detail in Note F – Financial Highlights to the consolidated financial statements included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q. The External Investment Manager serves as the investment adviser and administrator to MSC Income pursuant to an Investment Advisory and Administrative Services Agreement entered into in October 2020 between the External Investment Manager and MSC Income (the “Advisory Agreement”). Under the Advisory Agreement, the External Investment Manager earns a 1.75% annual base management fee on MSC Income’s average total assets, an incentive fee equal to 20% of pre-investment fee net investment income above a specified investment return hurdle rate and a 20% incentive fee on cumulative net realized capital gains in exchange for providing advisory services to MSC Income. Additionally, the External Investment Manager has entered into an Investment Management Agreement with MS Private Loan Fund I, LP, a private investment fund with a strategy to co-invest with Main Street in Private Loan portfolio investments (the “Private Loan Fund”), pursuant to which the External Investment Manager provides investment advisory and management services to the Private Loan Fund in exchange for an asset-based fee and certain incentive fees. The External Investment Manager may also advise other clients, including funds and separately managed accounts, pursuant to advisory and services agreements with such clients in exchange for asset-based and incentive fees. The External Investment Manager earns management fees based on the assets of the funds and accounts under management and may earn incentive fees, or a carried interest, based on the performance of the funds and accounts managed. The total contribution of the External Investment Manager to our net investment income consists of the combination of the expenses allocated to the External Investment Manager and the dividend income earned from the External Investment Manager. The total contribution to our net investment income was $8.1 million and $5.1 million for the three months ended March 31, 2023 and 2022, respectively. The External Investment Manager earned base management fee income of $5.5 million and $5.4 million during the three months ended March 31, 2023 and 2022, respectively. During the three months ended March 31, 2023 and 2022, the External Investment Manager earned incentive fee income of $3.3 million and $0.1 million, respectively. During both of the three months ended March 31, 2023 and 2022, the External Investment Manager earned administrative services fee income of $0.2 million. Our total expenses are net of expenses allocated to the External Investment Manager for the March 31, 2023 and 2022 of $5.0 million and $2.8 million, respectively. We have received an exemptive order from the SEC permitting co-investments among us, MSC Income and other funds and clients advised by the External Investment Manager in certain negotiated transactions where co-investing would otherwise be prohibited under the 1940 Act. We have made co-investments with, and in the future intend to continue to make co-investments with MSC Income, the Private Loan Fund and other clients advised by the External Investment Manager, in accordance with the conditions of the order. The order requires, among other things, that we and the External Investment Manager consider whether each such investment opportunity is appropriate for us and the External Investment Manager’s advised clients, as applicable, and if it is appropriate, to propose an allocation of the investment opportunity between such parties. Because the External Investment Manager may receive performance-based fee compensation from funds and clients advised by the External Investment Manager, this may provide the Company and the External Investment Manager an incentive to allocate opportunities to other participating funds and clients instead of us. However, both we and the External Investment Manager have policies and procedures in place to manage this conflict, including oversight by the independent members of our Board of Directors. In addition to the co-investment program described above, we also co-invest in syndicated deals and other transactions where price is the only negotiated point by us and our affiliates.
Risk Factors [Table Text Block]	Risk Factors You should carefully consider the risks described below and all other information contained in this Quarterly Report on Form 10-Q, including our interim financial statements and the related notes thereto, before making a decision to purchase our securities. The risks and uncertainties described below are not the only ones facing us. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may have a material adverse effect on our business, financial condition and/or operating results, as well as the market price of our securities. In addition to the other information set forth in this report, you should carefully consider the risk factors described in Part I, Item 1A. Risk Factors in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022 that we filed with the SEC on February 24, 2023, which could materially affect our business, financial condition and/or operating results. We maintain our cash at financial institutions, often in balances that exceed federally insured limits Our cash is held in accounts at U.S. banking institutions that we believe are of high quality. Cash held in deposit accounts may exceed the Federal Deposit Insurance Corporation (“FDIC”) insurance limits. If such banking institutions fail, we could lose all or a portion of those amounts held in excess of such insurance limitations. While the FDIC took control of two such banking institutions, Silicon Valley Bank (“SVB”) on March 10, 2023 and Signature Bank (“Signature”) on March 12, 3023, we did not have any accounts with SVB or Signature and therefore did not experience any direct risk of loss and our indirect exposure to SVB and Signature through our portfolio companies was determined to be immaterial. Any material loss, individually or in the aggregate, from a similarly failed banking relationship above FDIC insurance limits that we may experience in the future could have an adverse effect on our ability to pay our operational expenses or make other payments and may require us to move our accounts to other banks, which could cause a temporary delay in making payments to our vendors and employees and cause other operational inconveniences. In addition, if any of our portfolio companies are unable to access funds pursuant to such instruments or lending arrangements with such a financial institution, such portfolio company’s ability to pay their obligations or make distributions to us could be adversely affected.
Cash Accounts In Excess Of Federally Insured Limits [Member]
General Description of Registrant [Abstract]
Risk [Text Block]	We maintain our cash at financial institutions, often in balances that exceed federally insured limits Our cash is held in accounts at U.S. banking institutions that we believe are of high quality. Cash held in deposit accounts may exceed the Federal Deposit Insurance Corporation (“FDIC”) insurance limits. If such banking institutions fail, we could lose all or a portion of those amounts held in excess of such insurance limitations. While the FDIC took control of two such banking institutions, Silicon Valley Bank (“SVB”) on March 10, 2023 and Signature Bank (“Signature”) on March 12, 3023, we did not have any accounts with SVB or Signature and therefore did not experience any direct risk of loss and our indirect exposure to SVB and Signature through our portfolio companies was determined to be immaterial. Any material loss, individually or in the aggregate, from a similarly failed banking relationship above FDIC insurance limits that we may experience in the future could have an adverse effect on our ability to pay our operational expenses or make other payments and may require us to move our accounts to other banks, which could cause a temporary delay in making payments to our vendors and employees and cause other operational inconveniences. In addition, if any of our portfolio companies are unable to access funds pursuant to such instruments or lending arrangements with such a financial institution, such portfolio company’s ability to pay their obligations or make distributions to us could be adversely affected.

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
	Mar. 31, 2023
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation Main Street’s consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”). The Company is an investment company following accounting and reporting guidance in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 946, Financial Services—Investment Companies (“ASC 946”). For each of the periods presented herein, Main Street’s consolidated financial statements include the accounts of MSCC and its consolidated subsidiaries. The Investment Portfolio, as used herein, refers to all of Main Street’s investments in LMM portfolio companies, investments in Private Loan portfolio companies, investments in Middle Market portfolio companies, Other Portfolio investments and the investment in the External Investment Manager (see Note C — Fair Value Hierarchy for Investments — Portfolio Composition — Investment Portfolio Composition for additional discussion of Main Street’s Investment Portfolio and definitions for the defined terms Private Loan and Other Portfolio). Main Street’s results of operations for the three months ended March 31, 2023 and 2022, cash flows for the three months ended March 31, 2023 and 2022, and financial position as of March 31, 2023 and December 31, 2022, are presented on a consolidated basis. The effects of all intercompany transactions between MSCC and its consolidated subsidiaries have been eliminated in consolidation. The accompanying unaudited consolidated financial statements of Main Street are presented in conformity with U.S. GAAP for interim financial information and pursuant to the requirements for reporting on Form 10-Q and Articles 6, 10 and 12 of Regulation S-X. Accordingly, certain disclosures accompanying annual consolidated financial statements prepared in accordance with U.S. GAAP are omitted. The unaudited consolidated financial statements and notes should be read in conjunction with the audited financial statements and notes thereto for the year ended December 31, 2022. In the opinion of management, the unaudited consolidated financial results included herein contain all adjustments, consisting solely of normal recurring accruals, considered necessary for the fair presentation of financial statements for the interim periods included herein. The results of operations for the three months ended March 31, 2023 are not necessarily indicative of the operating results to be expected for the full year. Financial statements prepared on a U.S. GAAP basis require management to make estimates and assumptions that affect the amounts and disclosures reported in the consolidated financial statements and accompanying notes. Such estimates and assumptions could change in the future as more information becomes known, which could impact the amounts reported and disclosed herein.
Principles of Consolidation	Main Street’s results of operations for the three months ended March 31, 2023 and 2022, cash flows for the three months ended March 31, 2023 and 2022, and financial position as of March 31, 2023 and December 31, 2022, are presented on a consolidated basis. The effects of all intercompany transactions between MSCC and its consolidated subsidiaries have been eliminated in consolidation. Principles of Consolidation Under ASC 946, Main Street is precluded from consolidating other entities in which Main Street has equity investments, including those in which it has a controlling interest, unless the other entity is another investment company. An exception to this general principle in ASC 946 occurs if Main Street holds a controlling interest in an operating company that provides all or substantially all of its services directly to Main Street or to its portfolio companies. Accordingly, as noted above, MSCC’s consolidated financial statements include the financial position and operating results for the Funds, the Taxable Subsidiaries and the Structured Subsidiaries. Main Street has determined that none of its portfolio investments qualify for this exception, including the investment in the External Investment Manager. Therefore, Main Street’s Investment Portfolio is carried on the Consolidated Balance Sheets at fair value, as discussed further in Note B.1. — Summary of Significant Accounting Policies — Valuation of the Investment Portfolio , with any adjustments to fair value recognized as “Net Unrealized Appreciation (Depreciation)” until the investment is realized, usually upon exit, resulting in any gain or loss being recognized as a “Net Realized Gain (Loss),” in both cases on the Consolidated Statements of Operations.
Portfolio Investment Classification and Valuation of the Investment Portfolio	Portfolio Investment Classification Main Street classifies its Investment Portfolio in accordance with the requirements of the 1940 Act. Under the 1940 Act, (a) “Control Investments” are defined as investments in which Main Street owns more than 25% of the voting securities or has rights to maintain greater than 50% of the board representation, (b) “Affiliate Investments” are defined as investments in which Main Street owns between 5% and 25% (inclusive) of the voting securities and does not have rights to maintain greater than 50% of the board representation and (c) “Non-Control/Non-Affiliate Investments” are defined as investments that are neither Control Investments nor Affiliate Investments. For purposes of determining the classification of its Investment Portfolio, Main Street has excluded consideration of any voting securities or board appointment rights held by third-party investment funds advised by the External Investment Manager. Main Street accounts for its Investment Portfolio at fair value. As a result, Main Street follows the provisions of ASC 820, Fair Value Measurements and Disclosures (“ASC 820”). ASC 820 defines fair value, establishes a framework for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value and enhances disclosure requirements for fair value measurements. ASC 820 requires Main Street to assume that the portfolio investment is to be sold in the principal market to independent market participants, which may be a hypothetical market. Market participants are defined as buyers and sellers in the principal market that are independent, knowledgeable and willing and able to transact. Main Street’s portfolio strategy calls for it to invest primarily in illiquid debt and equity securities issued by privately held, LMM companies and debt securities issued by Middle Market companies that are generally larger in size than the LMM companies and that can be more liquid than the debt securities issued by LMM companies. Main Street categorizes some of its investments in LMM companies and Middle Market companies as Private Loan portfolio investments, which are primarily debt securities in privately held companies that have primarily been originated directly by Main Street or, to a lesser extent, through its strategic relationships with other investment funds on a collaborative basis through investments that are often referred to in the debt markets as “club deals” because of the small lender group size. In both cases, our Private Loan investments are typically made to support a company owned by or in the process of being acquired by a private equity sponsor. Private Loan investments are made in companies that are consistent with the size of companies Main Street invests in through its LMM portfolio and Middle Market portfolio. Main Street’s portfolio also includes Other Portfolio investments which primarily consist of investments that are not consistent with the typical profiles for its LMM, Private Loan or Middle Market portfolio investments, including investments which may be managed by third parties. Main Street’s portfolio may also include short-term portfolio investments that are atypical of Main Street’s LMM, Private Loan and Middle Market portfolio investments in that they are intended to be a short-term deployment of capital and are more liquid than investments within the other portfolios. Main Street’s portfolio investments may be subject to restrictions on resale. LMM investments and Other Portfolio investments generally have no established trading market, while Private Loan investments may include investments which have no established market or have established markets that are not active. Middle Market and short-term portfolio investments generally have established markets that are not active. Main Street determines in good faith the fair value of its Investment Portfolio pursuant to a valuation policy in accordance with ASC 820, with such valuation process approved by its Board of Directors and in accordance with the 1940 Act. Main Street’s valuation policies and processes are intended to provide a consistent basis for determining the fair value of Main Street’s Investment Portfolio. For LMM portfolio investments, Main Street generally reviews external events, including private mergers, sales and acquisitions involving comparable companies, and includes these events in the valuation process by using an enterprise value waterfall methodology (“Waterfall”) for its LMM equity investments and an income approach using a yield-to-maturity model (“Yield-to-Maturity”) valuation method for its LMM debt investments. For Private Loan and Middle Market portfolio investments in debt securities for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value the investment in a current hypothetical sale using the Yield-to-Maturity valuation method. For Middle Market and short-term portfolio investments in debt securities for which it has determined that third-party quotes or other independent prices are available, Main Street primarily uses quoted prices in the valuation process. Main Street determines the appropriateness of the use of third-party broker quotes, if any, in determining fair value based on its understanding of the level of actual transactions used by the broker to develop the quote and whether the quote was an indicative price or binding offer, the depth and consistency of broker quotes and the correlation of changes in broker quotes with underlying performance of the portfolio company and other market indices. For its Other Portfolio equity investments, Main Street generally calculates the fair value of the investment primarily based on the net asset value (“NAV”) of the fund and adjusts the fair value for other factors deemed relevant that would affect the fair value of the investment. All of the valuation approaches for Main Street’s portfolio investments estimate the value of the investment as if Main Street were to sell, or exit, the investment as of the measurement date. These valuation approaches consider the value associated with Main Street’s ability to control the capital structure of the portfolio company, as well as the timing of a potential exit. For valuation purposes, “control” portfolio investments are composed of debt and equity securities in companies for which Main Street has a controlling interest in the equity ownership of the portfolio company or the ability to nominate a majority of the portfolio company’s board of directors. For valuation purposes, “non-control” portfolio investments are generally composed of debt and equity securities in companies for which Main Street does not have a controlling interest in the equity ownership of the portfolio company or the ability to nominate a majority of the portfolio company’s board of directors. Under the Waterfall valuation method, Main Street estimates the enterprise value of a portfolio company using a combination of market and income approaches or other appropriate valuation methods, such as considering recent transactions in the equity securities of the portfolio company or third-party valuations of the portfolio company, and then performs a Waterfall calculation by allocating the enterprise value over the portfolio company’s securities in order of their preference relative to one another. The enterprise value is the fair value at which an enterprise could be sold in a transaction between two willing parties, other than through a forced or liquidation sale. Typically, privately held companies are bought and sold based on multiples of earnings before interest, taxes, depreciation and amortization (“EBITDA”), cash flows, net income, revenues, or in limited cases, book value. There is no single methodology for estimating enterprise value. For any one portfolio company, enterprise value is generally described as a range of values from which a single estimate of enterprise value is derived. In estimating the enterprise value of a portfolio company, Main Street analyzes various factors including the portfolio company’s historical and projected financial results. Due to SEC deadlines for Main Street’s quarterly and annual financial reporting, the operating results of a portfolio company used in the current period valuation are generally the results from the period ended three months prior to such valuation date and may include unaudited, projected, budgeted or pro forma financial information and may require adjustments for non-recurring items or to normalize the operating results that may require significant judgment in determining. In addition, projecting future financial results requires significant judgment regarding future growth assumptions. In evaluating the operating results, Main Street also analyzes the impact of exposure to litigation, loss of customers or other contingencies. After determining the appropriate enterprise value, Main Street allocates the enterprise value to investments in order of the legal priority of the various components of the portfolio company’s capital structure. In applying the Waterfall valuation method, Main Street assumes the loans are paid-off at the principal amount in a change in control transaction and are not assumed by the buyer, which Main Street believes is consistent with its past transaction history and standard industry practices. Under the Yield-to-Maturity valuation method, Main Street also uses the income approach to determine the fair value of debt securities based on projections of the discounted future free cash flows that the debt security will likely generate, including analyzing the discounted cash flows of interest and principal amounts for the debt security, as set forth in the associated loan agreements, as well as the financial position and credit risk of the portfolio company. Main Street’s estimate of the expected repayment date of its debt securities is generally the maturity date of the instrument, as Main Street generally intends to hold its loans and debt securities to maturity. The Yield-to-Maturity analysis also considers changes in leverage levels, credit quality, portfolio company performance, changes in market-based interest rates and other factors. Main Street will generally use the value determined by the Yield-to-Maturity analysis as the fair value for that security; however, because of Main Street’s general intent to hold its loans to maturity, the fair value will not exceed the principal amount of the debt security valued using the Yield-to-Maturity valuation method. A change in the assumptions that Main Street uses to estimate the fair value of its debt securities using the Yield-to-Maturity valuation method could have a material impact on the determination of fair value. If there is deterioration in credit quality or if a debt security is in workout status, Main Street may consider other factors in determining the fair value of the debt security, including the value attributable to the debt security from the enterprise value of the portfolio company or the proceeds that would most likely be received in a liquidation analysis. Under the NAV valuation method, for an investment in an investment fund that does not have a readily determinable fair value, Main Street measures the fair value of the investment predominately based on the NAV of the investment fund as of the measurement date and adjusts the investment’s fair value for factors known to Main Street that would affect that fund’s NAV, including, but not limited to, fair values for individual investments held by the fund if Main Street holds the same investment or for a publicly traded investment. In addition, in determining the fair value of the investment, Main Street considers whether adjustments to the NAV are necessary in certain circumstances, based on the analysis of any restrictions on redemption of Main Street’s investment as of the measurement date, recent actual sales or redemptions of interests in the investment fund, and expected future cash flows available to equity holders, including the rate of return on those cash flows compared to an implied market return on equity required by market participants, or other uncertainties surrounding Main Street’s ability to realize the full NAV of its interests in the investment fund. Pursuant to its internal valuation process and the requirements under the 1940 Act, Main Street performs valuation procedures on each of its portfolio investments quarterly. In addition to its internal valuation process, in arriving at estimates of fair value for its investments in its LMM portfolio companies, Main Street, among other things, consults with a nationally recognized independent financial advisory services firm (the “Financial Advisory Firm”). The Financial Advisory Firm analyzes and provides observations, recommendations and an assurance certification regarding the Company’s determinations of the fair value of its LMM portfolio company investments. The Financial Advisory Firm is generally consulted relative to Main Street’s investments in each LMM portfolio company at least once every calendar year, and for Main Street’s investments in new LMM portfolio companies, at least once in the twelve-month period subsequent to the initial investment. In certain instances, Main Street may determine that it is not cost-effective, and as a result is not in its stockholders’ best interest, to consult with the Financial Advisory Firm on its investments in one or more LMM portfolio companies. Such instances include, but are not limited to, situations where the fair value of Main Street’s investment in a LMM portfolio company is determined to be insignificant relative to the total Investment Portfolio. Main Street consulted with and received an assurance certification from the Financial Advisory Firm in arriving at Main Street’s determination of fair value on its investments in a total of 19 LMM portfolio companies for the three months ended March 31, 2023, representing 30% of the total LMM portfolio at fair value as of March 31, 2023, and on a total of 19 LMM portfolio companies for the three months ended March 31, 2022, representing 30% of the total LMM portfolio at fair value as of March 31, 2022. Excluding its investments in LMM portfolio companies that, as of March 31, 2023 and 2022, as applicable, had not been in the Investment Portfolio for at least twelve months subsequent to the initial investment or whose primary purpose is to own real estate for which a third-party appraisal is obtained on at least an annual basis, the percentage of the LMM portfolio reviewed and certified by the Financial Advisory Firm for the three months ended March 31, 2023 and 2022 was 32% and 36% of the total LMM portfolio at fair value, respectively. For valuation purposes, all of Main Street’s Private Loan portfolio investments are non-control investments. For Private Loan portfolio investments for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value such Private Loan debt investments in a current hypothetical sale using the Yield-to-Maturity valuation method and such Private Loan equity investments in a current hypothetical sale using the Waterfall valuation method. In addition to its internal valuation process, in arriving at estimates of fair value for its investments in its Private Loan portfolio companies, Main Street, among other things, consults with the Financial Advisory Firm. The Financial Advisory Firm analyzes and provides observations and recommendations and an assurance certification regarding Main Street’s determinations of the fair value of its Private Loan portfolio company investments. The Financial Advisory Firm is generally consulted relative to Main Street’s investments in each Private Loan portfolio company at least once every calendar year, and for Main Street’s investments in new Private Loan portfolio companies, at least once in the twelve-month period subsequent to the initial investment. In certain instances, Main Street may determine that it is not cost-effective, and as a result is not in its stockholders’ best interest, to consult with the Financial Advisory Firm on its investments in one or more Private Loan portfolio companies. Such instances include, but are not limited to, situations where the fair value of Main Street’s investment in a Private Loan portfolio company is determined to be insignificant relative to the total Investment Portfolio. Main Street consulted with and received an assurance certification from the Financial Advisory Firm in arriving at its determination of fair value on its investments in a total of 19 Private Loan portfolio companies for the three months ended March 31, 2023, representing 25% of the total Private Loan portfolio at fair value as of March 31, 2023, and on a total of 18 Private Loan portfolio companies for the three months ended March 31, 2022, representing 26% of the total Private Loan portfolio at fair value as of March 31, 2022. Excluding its investments in Private Loan portfolio companies that, as of March 31, 2023 and 2022, as applicable, had not been in the Investment Portfolio for at least twelve months subsequent to the initial investment and its investments in Private Loan portfolio companies that were not reviewed because the investment is valued based upon third-party quotes or other independent pricing, the percentage of the Private Loan portfolio reviewed and certified by the Financial Advisory Firm for the three months ended March 31, 2023 and 2022 was 28% and 42% of the total Private Loan portfolio at fair value, respectively. For valuation purposes, all of Main Street’s Middle Market portfolio investments are non-control investments. To the extent sufficient observable inputs are available to determine fair value, Main Street uses observable inputs to determine the fair value of these investments through obtaining third-party quotes or other independent pricing. For Middle Market portfolio investments for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value such Middle Market debt investments in a current hypothetical sale using the Yield-to-Maturity valuation method and such Middle Market equity investments in a current hypothetical sale using the Waterfall valuation method. Main Street generally consults on a limited basis with the Financial Advisory Firm in connection with determining the fair value of its Middle Market portfolio investments due to the nature of these investments. The vast majority (90% and 89% as of March 31, 2023 and December 31, 2022, respectively) of the Middle Market portfolio investments (i) are valued using third-party quotes or other independent pricing services, (ii) Main Street has consulted with and received an assurance certification from the Financial Advisory Firm within the last twelve months or (iii) are new investments that have not been in the Investment Portfolio for at least twelve months subsequent to the initial investment. For valuation purposes, all of Main Street’s short-term portfolio investments are non-control investments. To the extent sufficient observable inputs are available to determine fair value, Main Street uses observable inputs to determine the fair value of these investments through obtaining third-party quotes or other independent pricing. Because all of the short-term portfolio investments are typically valued using third-party quotes or other independent pricing services, Main Street generally does not consult with any financial advisory services firms in connection with determining the fair value of its short-term portfolio investments. For valuation purposes, all of Main Street’s Other Portfolio investments are non-control investments. Main Street’s Other Portfolio investments comprised 2.8% of Main Street’s Investment Portfolio at fair value as of both March 31, 2023 and December 31, 2022, respectively. Similar to the LMM investment portfolio, market quotations for Other Portfolio equity investments are generally not readily available. For its Other Portfolio equity investments, Main Street generally determines the fair value of these investments using the NAV valuation method. For valuation purposes, Main Street’s investment in the External Investment Manager is a control investment. Market quotations are not readily available for this investment, and as a result, Main Street determines the fair value of the External Investment Manager using the Waterfall valuation method under the market approach. In estimating the enterprise value, Main Street analyzes various factors, including the entity’s historical and projected financial results, as well as its size, marketability and performance relative to the population of market comparables. This valuation approach estimates the value of the investment as if Main Street were to sell, or exit, the investment. In addition, Main Street considers its ability to control the capital structure of the company, as well as the timing of a potential exit, in connection with determining the fair value of the External Investment Manager. Main Street consults with and receives an assurance certification from the Financial Advisory Firm in arriving at its determination of fair value for its investment in the External Investment Adviser on a quarterly rotation basis similar to its practice for other investment portfolio assets without third party quotes or other independent pricing. Due to the inherent uncertainty in the valuation process, Main Street’s determination of fair value for its Investment Portfolio may differ materially from the values that would have been determined had a ready market for the securities existed. In addition, changes in the market environment, portfolio company performance and other events that may occur over the lives of the investments may cause the gains or losses ultimately realized on these investments to be materially different than the valuations currently assigned. Main Street determines the fair value of each individual investment and records changes in fair value as unrealized appreciation or depreciation. Main Street uses an internally developed portfolio investment rating system in connection with its investment oversight, portfolio management and analysis and investment valuation procedures for its LMM, Private Loan and Middle Market portfolio companies. This system takes into account both quantitative and qualitative factors of each LMM, Private Loan and Middle Market portfolio company. In December 2020, the SEC adopted Rule 2a-5 under the 1940 Act, which permits a BDC’s board of directors to designate its executive officers or investment adviser as a valuation designee to determine the fair value for its investment portfolio, subject to the active oversight of the board. Main Street’s Board of Directors has approved policies and procedures pursuant to Rule 2a-5 (the “Valuation Procedures”) and has designated a group of its executive officers to serve as the Board of Directors’ valuation designee. Main Street believes its Investment Portfolio as of March 31, 2023 and December 31, 2022 approximates fair value as of those dates based on the markets in which it operates and other conditions in existence on those reporting dates.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. Actual results may differ from these estimates under different conditions or assumptions. Additionally, as explained in Note B.1. — Summary of Significant Accounting Policies — Valuation of the Investment Portfolio , the consolidated financial statements include investments in the Investment Portfolio whose values have been estimated by Main Street, pursuant to valuation policies and procedures approved and overseen by Main Street’s Board of Directors, in the absence of readily ascertainable market values. Because of the inherent uncertainty of the Investment Portfolio valuations, those estimated values may differ materially from the values that would have been determined had a ready market for the securities existed. Macroeconomic factors, including the COVID-19 pandemic, risk of recession, inflation, supply chain constraints or disruptions, geopolitical disruptions and rising interest rates, and the related effect on the U.S. and global economies, have impacted, and may continue to impact, the businesses and operating results of certain of Main Street’s portfolio companies, as well as market interest rate spreads. As a result of these and other current effects of macroeconomic factors, as well as the uncertainty regarding the extent and duration of their impact, the valuation of Main Street’s Investment Portfolio has and may continue to experience increased volatility.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents consist of cash and highly liquid investments with an original maturity of three months or less at the date of purchase. Cash and cash equivalents are carried at cost, which approximates fair value. At March 31, 2023, cash balances totaling $35.2 million exceeded Federal Deposit Insurance Corporation insurance protection levels, subjecting the Company to risk related to the uninsured balance. All of the Company’s cash deposits are held at large established high credit quality financial institutions, and management believes that the risk of loss associated with any uninsured balances is remote.
Interest	Main Street records interest and dividend income on the accrual basis to the extent amounts are expected to be collected. Dividend income is recorded when dividends are declared by the portfolio company or at such other time that an obligation exists for the portfolio company to make a distribution. Main Street evaluates accrued interest and dividend income periodically for collectability. When a loan or debt security becomes 90 days or more past due, and if Main Street otherwise does not expect the debtor to be able to service its debt obligation, Main Street will generally place the loan or debt security on non-accrual status and cease recognizing interest income on that loan or debt security until the borrower has demonstrated the ability and intent to pay contractual amounts due. If a loan or debt security’s status significantly improves regarding the debtor’s ability to service the debt obligation, or if a loan or debt security is sold or written off, Main Street removes it from non-accrual status
Dividend	Main Street records interest and dividend income on the accrual basis to the extent amounts are expected to be collected. Dividend income is recorded when dividends are declared by the portfolio company or at such other time that an obligation exists for the portfolio company to make a distribution. Main Street evaluates accrued interest and dividend income periodically for collectability. When a loan or debt security becomes 90 days or more past due, and if Main Street otherwise does not expect the debtor to be able to service its debt obligation, Main Street will generally place the loan or debt security on non-accrual status and cease recognizing interest income on that loan or debt security until the borrower has demonstrated the ability and intent to pay contractual amounts due. If a loan or debt security’s status significantly improves regarding the debtor’s ability to service the debt obligation, or if a loan or debt security is sold or written off, Main Street removes it from non-accrual status Main Street holds certain debt and preferred equity instruments in its Investment Portfolio that contain payment-in-kind (“PIK”) interest and cumulative dividend provisions. The PIK interest, computed at the contractual rate specified in each debt agreement, is periodically added to the principal balance of the debt and is recorded as interest income. Thus, the actual collection of this interest may be deferred until the time of debt principal repayment. Cumulative dividends are recorded as dividend income, and any dividends in arrears are added to the balance of the preferred equity investment. The actual collection of these dividends in arrears may be deferred until such time as the preferred equity is redeemed or sold. To maintain RIC tax treatment (as discussed in Note B.9. — Summary of Significant Accounting Policies — Income Taxes below), these non-cash sources of income may need to be paid out to stockholders in the form of distributions, even though Main Street may not have collected the PIK interest and cumulative dividends in cash. Main Street stops accruing PIK
Fee Income	Main Street may periodically provide services, including structuring and advisory services, to its portfolio companies or other third parties. For services that are separately identifiable and evidence exists to substantiate fair value, fee income is recognized as earned, which is generally when the investment or other applicable transaction closes. Fees received in connection with debt financing transactions for services that do not meet these criteria are treated as debt origination fees and are generally deferred and accreted into income over the life of the financing.
Deferred Financing Costs	Deferred Financing Costs Deferred financing costs include commitment fees and other direct costs related to Main Street’s multi-year revolving credit facility (the “Corporate Facility”) and special purpose vehicle revolving credit facility (the “SPV Facility” and, together with the Corporate Facility, the “Credit Facilities”) and its unsecured notes, as well as the commitment fees and leverage fees (3.4% of the total commitment and draw amounts, as applicable) on the SBIC debentures. See further discussion of Main Street’s debt in Note E — Debt . Deferred financing costs in connection with the Credit Facilities are capitalized as an asset. Deferred financing costs in connection with all other debt arrangements are a direct deduction from the principal amount outstanding.
Equity Offering Costs	Equity Offering CostsThe Company’s offering costs are charged against the proceeds from equity offerings when the proceeds are received.
Unearned Income—Debt Origination Fees and Original Issue Discount and Discounts / Premiums to Par Value	Unearned Income—Debt Origination Fees and Original Issue Discount and Discounts / Premiums to Par Value Main Street capitalizes debt origination fees received in connection with financings and reflects such fees as unearned income netted against the applicable debt investments. The unearned income from the fees is accreted into income over the life of the financing. In connection with its portfolio debt investments, Main Street sometimes receives nominal cost warrants or warrants with an exercise price below the fair value of the underlying equity (together, “nominal cost equity”) that are valued as part of the negotiation process with the particular portfolio company. When Main Street receives nominal cost equity, Main Street allocates its cost basis in its investment between its debt security and its nominal cost equity at the time of origination based on amounts negotiated with the particular portfolio company. The allocated amounts are based upon the fair value of the nominal cost equity, which is then used to determine the allocation of cost to the debt security. Any discount recorded on a debt investment resulting from this allocation is reflected as unearned income, which is netted against the applicable debt investment, and accreted into interest income over the life of the debt investment. The actual collection of this interest is deferred until the time of debt principal repayment. Main Street may also purchase debt securities at a discount or at a premium to the par value of the debt security. In the case of a purchase at a discount, Main Street records the investment at the par value of the debt security net of the discount, and the discount is accreted into interest income over the life of the debt investment. In the case of a purchase at a premium, Main Street records the investment at the par value of the debt security plus the premium, and the premium is amortized as a reduction to interest income over the life of the debt investment.
Share-Based Compensation	Share-Based Compensation Main Street accounts for its share-based compensation plans using the fair value method, as prescribed by ASC 718, Compensation—Stock Compensation. Accordingly, for restricted stock awards, Main Street measures the grant date fair value based upon the market price of its common stock on the date of the grant and amortizes the fair value of the awards as share-based compensation expense over the requisite service period, which is generally the vesting term. Main Street has also adopted Accounting Standards Update (“ASU”) 2016-09, Compensation—Stock Compensation: Improvements to Employee Share-Based Payment Accounting , which requires that all excess tax benefits and tax deficiencies (including tax benefits of dividends on share-based payment awards) be recognized as income tax expense or benefit in the income statement and not delay recognition of a tax benefit until the tax benefit is realized through a reduction to taxes payable. Accordingly, the tax effects of exercised or vested awards are treated as discrete items in the reporting period in which they occur. Additionally, Main Street has elected to account for forfeitures as they occur.
Income Taxes	Income Taxes MSCC has elected to be treated for U.S. federal income tax purposes as a RIC. MSCC’s taxable income includes the taxable income generated by MSCC and certain of its subsidiaries, including the Funds and Structured Subsidiaries, which are treated as disregarded entities for tax purposes. As a RIC, MSCC generally will not pay corporate-level U.S. federal income taxes on any net ordinary taxable income or capital gains that MSCC distributes to its stockholders. MSCC must generally distribute at least 90% of its “investment company taxable income” (which is generally its net ordinary taxable income and realized net short-term capital gains in excess of realized net long-term capital losses) and 90% of its tax-exempt income to maintain its RIC status (pass-through tax treatment for amounts distributed). As part of maintaining RIC status, undistributed taxable income (subject to a 4% non-deductible U.S. federal excise tax) pertaining to a given fiscal year may be distributed up to twelve months subsequent to the end of that fiscal year, provided such dividends are declared on or prior to the later of (i) the filing of the U.S. federal income tax return for the applicable fiscal year or (ii) the fifteenth day of the ninth month following the close of the year in which such taxable income was generated. The Taxable Subsidiaries primarily hold certain equity investments for Main Street. The Taxable Subsidiaries permit Main Street to hold equity investments in portfolio companies which are “pass-through” entities for tax purposes and to continue to comply with the “source-of-income” requirements contained in the RIC tax provisions of the Code. The Taxable Subsidiaries are consolidated with Main Street for U.S. GAAP financial reporting purposes, and the portfolio investments held by the Taxable Subsidiaries are included in Main Street’s consolidated financial statements as portfolio investments and recorded at fair value. The Taxable Subsidiaries are not consolidated with MSCC for income tax purposes and may generate income tax expense, or benefit, and tax assets and liabilities, as a result of their ownership of certain portfolio investments. The taxable income, or loss, of the Taxable Subsidiaries may differ from their book income, or loss, due to temporary book and tax timing differences and permanent differences. The Taxable Subsidiaries are each taxed at corporate income tax rates based on their taxable income. The income tax expense, or benefit, if any, and the related tax assets and liabilities, of the Taxable Subsidiaries are reflected in Main Street’s consolidated financial statements. The External Investment Manager is an indirect wholly-owned subsidiary of MSCC owned through a Taxable Subsidiary and is a disregarded entity for tax purposes. The External Investment Manager has entered into a tax sharing agreement with its Taxable Subsidiary owner. Since the External Investment Manager is accounted for as a portfolio investment of MSCC and is not included as a consolidated subsidiary of MSCC in MSCC’s consolidated financial statements, and as a result of the tax sharing agreement with its Taxable Subsidiary owner, for its stand-alone financial reporting purposes the External Investment Manager is treated as if it is taxed at corporate income tax rates based on its taxable income and, as a result of its activities, may generate income tax expense or benefit. The income tax expense, or benefit, if any, and the related tax assets and liabilities, of the External Investment Manager are reflected in the External Investment Manager’s separate financial statements. The Taxable Subsidiaries and the External Investment Manager use the liability method in accounting for income taxes. Deferred tax assets and liabilities are recorded for temporary differences between the tax basis of assets and liabilities and their reported amounts in the consolidated financial statements, using statutory tax rates in effect for the year in which the temporary differences are expected to reverse. A valuation allowance is provided, if necessary, against deferred tax assets when it is more likely than not that some portion or all of the deferred tax asset will not be realized. Main Street’s net assets as included on the Consolidated Balance Sheets and Consolidated Statements of Changes in Net Assets include an adjustment to classification as a result of permanent book-to-tax differences, which include differences in the book and tax treatment of income and expenses. Taxable income generally differs from net income for financial reporting purposes due to temporary and permanent differences in the recognition of income and expenses. Taxable income generally excludes net unrealized appreciation or depreciation, as investment gains or losses are not included in taxable income until they are realized.
Net Realized Gains or Losses and Net Unrealized Appreciation or Depreciation	Net Realized Gains or Losses and Net Unrealized Appreciation or DepreciationRealized gains or losses are measured by the difference between the net proceeds from the sale or redemption of an investment or a financial instrument and the cost basis of the investment or financial instrument, without regard to unrealized appreciation or depreciation previously recognized, and includes investments written-off during the period net of recoveries and realized gains or losses from in-kind redemptions. Net unrealized appreciation or depreciation reflects the net change in the fair value of the Investment Portfolio and financial instruments and the reclassification of any prior period unrealized appreciation or depreciation on exited investments and financial instruments to realized gains or losses.
Fair Value of Financial Instruments	Fair Value of Financial Instruments Fair value estimates are made at discrete points in time based on relevant information. These estimates may be subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Main Street believes that the carrying amounts of its financial instruments, consisting of cash and cash equivalents, receivables, payables and other liabilities approximate the fair values of such items due to the short-term nature of these instruments. To estimate the fair value of Main Street’s multiple tranches of unsecured debt instruments as disclosed in Note E — Debt , Main Street uses quoted market prices. For the estimated fair value of Main Street’s SBIC debentures, Main Street uses the Yield-to-Maturity valuation method based on projections of the discounted future free cash flows that the debt security will likely generate, including both the discounted cash flows of the associated interest and principal amounts for the debt security.
Earnings per Share	Earnings per Share Basic and diluted per share calculations are computed utilizing the weighted-average number of shares of common stock outstanding for the period. In accordance with ASC 260, Earnings Per Share , the unvested shares of restricted stock awarded pursuant to Main Street’s equity compensation plans are participating securities and, therefore, are included in the
Recently Issued or Adopted Accounting Standards	Recently Issued or Adopted Accounting Standards In March 2020, the FASB issued ASU 2020-04, Reference rate reform (Topic 848) — Facilitation of the effects of reference rate reform on financial reporting . The amendments in this update provide optional expedients and exceptions for applying U.S. GAAP to certain contracts and hedging relationships that reference LIBOR or another reference rate expected to be discontinued due to reference rate reform and became effective upon issuance for all entities. The Company has agreements that have LIBOR as a reference rate with certain portfolio companies and also with certain lenders. Many of these agreements include language for choosing an alternative successor rate if LIBOR reference is no longer considered to be appropriate. Contract modifications are required to be evaluated in determining whether the modifications result in the establishment of new contracts or the continuation of existing contracts. The Company adopted this amendment in March 2020 and plans to apply the amendments in this update to account for contract modifications due to changes in reference rates when LIBOR reference is no longer used. The Company utilized the optional expedients and exceptions provided by ASU 2020-04 during the three months ended March 31, 2023 and the year ended December 31, 2022, the effect of which was not material to the consolidated financial statements and the notes thereto. In December 2021, the SEC published Staff Accounting Bulletin No. 120 (“SAB 120”) to provide accounting and disclosure guidance for stock compensation awards made to executives and conforming amendments to the Staff Accounting Bulletin Series to align with the current authoritative accounting guidance in ASC 718, Compensation — Stock Compensation . In part, SAB 120 requires that an entity disclose how it determines the current price of underlying shares for grant-date fair value, the policy for when an adjustment to the share price is required, how it determines the amount of an adjustment to the share price and any significant assumptions used in determining an adjustment to the share price. SAB 120 is effective for all stock compensation awards issued after December 1, 2021. Main Street is in compliance with the guidance pursuant to SAB 120 for any share-based compensation disclosures. See Note J — Share-Based Compensation for further discussion of Main Street’s policies and procedures regarding share-based compensation. The impact of SAB 120 was not material to the consolidated financial statements and the notes thereto. In June 2022, the FASB issued ASU 2022-03, Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions . The amendments in this update provide that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security and, therefore, is not considered in measuring fair value. The amendments in this update also require additional disclosures for equity securities subject to contractual sales restrictions. ASU 2022-03 is effective for years beginning after December 15, 2023, though early adoption is permitted. The Company elected to early adopt ASU 2022-03 as of December 31, 2022 and it did not have a material impact on the consolidated financial statements and the notes thereto. In November 2022, the FASB issued ASU 2022-06, Reference rate reform (Topic 848) — Deferral of the Sunset Date of Topic 848 . The amendments in this update defer the sunset date of Topic 848 from December 31, 2022 to December 31, 2024, after which entities will no longer be permitted to apply the relief in Topic 848. The Company utilized the optional expedients provided by ASU 2020-04 during the three months ended March 31, 2023 and the year ended December 31, 2022, the effect of which was not material to the consolidated financial statements and the notes thereto. The Company will continue to utilize the optional expedients provided by ASU 2020-04 and extended by ASU 2022-06 through the year end December 31, 2024. The Company does not expect ASU 2022-06 to have a material impact to the consolidated financial statements and the notes thereto. From time to time, new accounting pronouncements are issued by the FASB or other standards-setting bodies that are adopted by the Company as of the specified effective date. The Company believes that the impact of recently issued standards and any that are not yet effective will not have a material impact on its consolidated financial statements upon adoption.
Fair Value Measurement	ASC 820 defines fair value, establishes a framework for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value, and enhances disclosure requirements for fair value measurements. Main Street accounts for its investments at fair value. Fair Value Hierarchy In accordance with ASC 820, Main Street has categorized its investments based on the priority of the inputs to the valuation technique into a three-level fair value hierarchy. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical investments (Level 1) and the lowest priority to unobservable inputs (Level 3). Investments recorded on Main Street’s Consolidated Balance Sheets are categorized based on the inputs to the valuation techniques as follows: Level 1—Investments whose values are based on unadjusted quoted prices for identical assets in an active market that Main Street has the ability to access (examples include investments in active exchange-traded equity securities and investments in most U.S. government and agency securities). Level 2—Investments whose values are based on quoted prices in markets that are not active or model inputs that are observable either directly or indirectly for substantially the full term of the investment. Level 2 inputs include the following: • Quoted prices for similar assets in active markets (for example, investments in restricted stock); • Quoted prices for identical or similar assets in non-active markets (for example, investments in thinly traded public companies); • Pricing models whose inputs are observable for substantially the full term of the investment (for example, market interest rate indices); and • Pricing models whose inputs are derived principally from, or corroborated by, observable market data through correlation or other means for substantially the full term of the investment. Level 3—Investments whose values are based on prices or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement (for example, investments in illiquid securities issued by privately held companies). These inputs reflect management’s own assumptions about the assumptions a market participant would use in pricing the investment. As required by ASC 820, when the inputs used to measure fair value fall within different levels of the hierarchy, the level within which the fair value measurement is categorized is based on the lowest level input that is significant to the fair value measurement in its entirety. For example, a Level 3 fair value measurement may include inputs that are observable (Levels 1 and 2) and unobservable (Level 3). Therefore, unrealized appreciation and depreciation related to such investments categorized within the Level 3 tables below may include changes in fair value that are attributable to both observable inputs (Levels 1 and 2) and unobservable inputs (Level 3). As of March 31, 2023 and December 31, 2022, all of Main Street’s LMM portfolio investments consisted of illiquid securities issued by privately held companies and the fair value determination for these investments primarily consisted of unobservable inputs. As a result, all of Main Street’s LMM portfolio investments were categorized as Level 3 as of March 31, 2023 and December 31, 2022. As of March 31, 2023 and December 31, 2022, Main Street’s Private Loan portfolio investments primarily consisted of investments in interest-bearing secured debt investments. The fair value determination for these investments consisted of a combination of observable inputs in non-active markets for which sufficient observable inputs were not available to determine the fair value of these investments and unobservable inputs. As a result, all of Main Street’s Private Loan portfolio investments were categorized as Level 3 as of March 31, 2023 and December 31, 2022. As of March 31, 2023 and December 31, 2022, Main Street’s Middle Market portfolio investments consisted primarily of investments in secured and unsecured debt investments and independently rated debt investments. The fair value determination for these investments consisted of a combination of observable inputs in non-active markets for which sufficient observable inputs were not available to determine the fair value of these investments and unobservable inputs. As a result, all of Main Street’s Middle Market portfolio investments were categorized as Level 3 as of March 31, 2023 and December 31, 2022. As of March 31, 2023 and December 31, 2022, Main Street’s Other Portfolio investments consisted of illiquid securities issued by privately held companies and the fair value determination for these investments primarily consisted of unobservable inputs. As a result, all of Main Street’s Other Portfolio investments were categorized as Level 3 as of March 31, 2023 and December 31, 2022. As of March 31, 2023 and December 31, 2022, Main Street held one short-term portfolio investment, which was a secured debt investment. The fair value determination for this investment consisted of available observable inputs in non-active markets sufficient to determine the fair value of the investment. As a result, Main Street’s short-term portfolio investment was categorized as Level 2 as of March 31, 2023 and December 31, 2022. The fair value determination of each portfolio investment categorized as Level 3 required one or more of the following unobservable inputs: • Financial information obtained from each portfolio company, including unaudited statements of operations and balance sheets for the most recent period available as compared to budgeted numbers; • Current and projected financial condition of the portfolio company; • Current and projected ability of the portfolio company to service its debt obligations; • Type and amount of collateral, if any, underlying the investment; • Current financial ratios (e.g., fixed charge coverage ratio, interest coverage ratio and net debt/EBITDA ratio) applicable to the investment; • Current liquidity of the investment and related financial ratios (e.g., current ratio and quick ratio); • Pending debt or capital restructuring of the portfolio company; • Projected operating results of the portfolio company; • Current information regarding any offers to purchase the investment; • Current ability of the portfolio company to raise any additional financing as needed; • Changes in the economic environment which may have a material impact on the operating results of the portfolio company; • Internal occurrences that may have an impact (both positive and negative) on the operating performance of the portfolio company; • Qualitative assessment of key management; • Contractual rights, obligations or restrictions associated with the investment; and • Other factors deemed relevant. The use of significant unobservable inputs creates uncertainty in the measurement of fair value as of the reporting date. The significant unobservable inputs used in the fair value measurement of Main Street’s LMM equity securities, which are generally valued through an average of the discounted cash flow technique and the market comparable/enterprise value technique (unless one of these approaches is determined to not be appropriate), are (i) EBITDA multiples and (ii) the weighted-average cost of capital (“WACC”). Significant increases (decreases) in EBITDA multiple inputs in isolation would result in a significantly higher (lower) fair value measurement. On the contrary, significant increases (decreases) in WACC inputs in isolation would result in a significantly lower (higher) fair value measurement. The significant unobservable inputs used in the fair value measurement of Main Street’s LMM, Private Loan and Middle Market securities are (i) risk adjusted discount rates used in the Yield-to-Maturity valuation technique (see Note B.1. — Summary of Significant Accounting Policies — Valuation of the Investment Portfolio

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	3 Months Ended
	Mar. 31, 2023
Accounting Policies [Abstract]
Schedule of Investment Income	A presentation of total investment income Main Street received from its Investment Portfolio in each of the periods presented is as follows: Three Months Ended 2023 2022 (dollars in thousands) Interest, fee and dividend income: Interest income $ 93,392 $ 59,441 Dividend income 24,222 16,622 Fee income 2,640 3,332 Total interest, fee and dividend income $ 120,254 $ 79,395

FAIR VALUE HIERARCHY FOR INVE_2

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION (Tables)	3 Months Ended
	Mar. 31, 2023
Fair Value Disclosures [Abstract]
Schedule of Fair Value Measurement Inputs and Valuation Techniques	The following tables provide a summary of the significant unobservable inputs used to fair value Main Street’s Level 3 portfolio investments as of March 31, 2023 and December 31, 2022: Type of Fair Value as of March 31, 2023 (in thousands) Valuation Technique Significant Unobservable Inputs Range(3) Weighted Average(3) Median(3) Equity investments $ 1,217,243 Discounted cash flow WACC 9.3% - 22.3% 14.4 % 15.2 % Market comparable / Enterprise value EBITDA multiple (1) 4.5x - 8.5x (2) 6.8x 6.2x Debt investments $ 2,696,096 Discounted cash flow Risk adjusted discount factor 6.0% - 16.4% (2) 10.2 % 10.5 % Expected principal recovery percentage 0.0% - 100.0% 99.5 % 100.0 % Debt investments $ 245,636 Market approach Third-party quote 3.0 - 97.5 87.3 93.9 Total Level 3 investments $ 4,158,975 ____________________ (1) EBITDA may include proforma adjustments and/or other addbacks based on specific circumstances related to each investment. (2) Range excludes outliers that are greater than one standard deviation from the mean. Including these outliers, the range for EBITDA multiple is 2.0x - 15.7x and the range for risk adjusted discount factor is 3.4% - 35.0%. (3) Does not include investments for which the valuation technique does not include the use of the applicable fair value input. Type of Investment Fair Value as of December 31, 2022 (in thousands) Valuation Technique Significant Unobservable Inputs Range(3) Weighted Average(3) Median(3) Equity investments $ 1,172,077 Discounted cash flow WACC 9.4% - 22.5% 14.5 % 15.4 % Market comparable / Enterprise value EBITDA multiple (1) 4.3x - 8.3x (2) 6.7x 6.0x Debt investments $ 2,663,958 Discounted cash flow Risk adjusted discount factor 5.7% - 15.7% (2) 10.0 % 10.3 % Expected principal recovery percentage 0.0% - 100.0% 99.4 % 100.0 % Debt investments $ 264,238 Market approach Third-party quote 5.6 - 98.5 87.0 91.4 Total Level 3 investments $ 4,100,273 ____________________ (1) EBITDA may include proforma adjustments and/or other addbacks based on specific circumstances related to each investment. (2) Range excludes outliers that are greater than one standard deviation from the mean. Including these outliers, the range for EBITDA multiple is 2.0x - 15.7x and the range for risk adjusted discount factor is 3.8% - 43.3%. (3) Does not include investments for which the valuation technique does not include the use of the applicable fair value input.
Summary of Changes in Fair Value of Main Street’s Level 3 Portfolio Investments	The following tables provide a summary of changes in fair value of Main Street’s Level 3 portfolio investments for the three-month periods ended March 31, 2023 and 2022 (amounts in thousands): Type of Investment Fair Value as of December 31, 2022 Transfers Into Level 3 Hierarchy Redemptions/ Repayments New Investments Net Changes from Unrealized to Realized Net Unrealized Appreciation (Depreciation) Other(1) Fair Value as of March 31, 2023 Debt $ 2,928,196 $ — $ (88,300) $ 106,658 $ 33,064 $ (26,440) $ (11,446) $ 2,941,732 Equity 1,166,643 — (2,871) 8,476 (3,946) 29,890 14,022 1,212,214 Equity Warrant 5,434 — — — — 2,171 (2,576) 5,029 $ 4,100,273 $ — $ (91,171) $ 115,134 $ 29,118 $ 5,621 $ — $ 4,158,975 ____________________ (1) Includes the impact of non-cash conversions. These transactions represent non-cash investing activities. See additional cash flow information in the Consolidated Statements of Cash Flows. Type of Investment Fair Value as of December 31, 2021 Transfers Into Level 3 Hierarchy Redemptions/ Repayments New Investments Net Changes from Unrealized to Realized Net Unrealized Appreciation (Depreciation) Other(1) Fair Value as of March 31, 2022 Debt $ 2,509,568 $ — $ (183,699) $ 287,044 $ 2,123 $ (6,807) $ — $ 2,608,229 Equity 1,043,709 — (17,569) 24,711 418 22,512 — 1,073,781 Equity Warrant 6,560 — — — — 200 — 6,760 $ 3,559,837 $ — $ (201,268) $ 311,755 $ 2,541 $ 15,905 $ — $ 3,688,770 ____________________ (1) Includes the impact of non-cash conversions. These transactions represent non-cash investing activities. See additional cash flow information in the Consolidated Statements of Cash Flows.
Schedule of Portfolio Investments by Level in the Fair Value Hierarchy	At March 31, 2023 and December 31, 2022, Main Street’s investments at fair value were categorized as follows in the fair value hierarchy for ASC 820 purposes: Fair Value Measurements (in thousands) At March 31, 2023 Fair Value Quoted Prices in Significant Other Significant LMM portfolio investments $ 2,112,619 $ — $ — $ 2,112,619 Private Loan portfolio investments 1,491,395 — — 1,491,395 Middle Market portfolio investments 306,244 — — 306,244 Other Portfolio investments 116,067 — — 116,067 External Investment Manager 132,650 — — 132,650 Short-term portfolio investments 1,942 — 1,942 — Total investments $ 4,160,917 $ — $ 1,942 $ 4,158,975 Fair Value Measurements (in thousands) At December 31, 2022 Fair Value Quoted Prices in Significant Other Significant LMM portfolio investments $ 2,060,459 $ — $ — $ 2,060,459 Private Loan portfolio investments 1,471,466 — — 1,471,466 Middle Market portfolio investments 329,119 — — 329,119 Other Portfolio investments 116,299 — — 116,299 External Investment Manager 122,930 — — 122,930 Short-term portfolio investments 1,904 — 1,904 — Total investments $ 4,102,177 $ — $ 1,904 $ 4,100,273
Summary Investment Holdings	The following tables provide a summary of Main Street’s investments in the LMM, Private Loan and Middle Market portfolios as of March 31, 2023 and December 31, 2022 (this information excludes Other Portfolio investments, short-term portfolio investments and the External Investment Manager, which are discussed further below): As of March 31, 2023 LMM (a) Private Loan Middle Market (dollars in millions) Number of portfolio companies 79 86 30 Fair value $ 2,112.6 $ 1,491.4 $ 306.2 Cost $ 1,727.9 $ 1,527.6 $ 391.0 Debt investments as a % of portfolio (at cost) 72.9 % 97.1 % 93.6 % Equity investments as a % of portfolio (at cost) 27.1 % 2.9 % 6.4 % % of debt investments at cost secured by first priority lien 99.2 % 99.5 % 99.3 % Weighted-average annual effective yield (b) 12.6 % 12.4 % 11.8 % Average EBITDA (c) $ 8.3 $ 38.1 $ 65.4 ____________________ (a) At March 31, 2023, Main Street had equity ownership in all of its LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was 41%. (b) The weighted-average annual effective yields were computed using the effective interest rates for all debt investments at cost as of March 31, 2023, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status. The weighted-average annual effective yield on Main Street’s debt portfolio as of March 31, 2023 including debt investments on non-accrual status was 12.2% for its LMM portfolio, 12.0% for its Private Loan portfolio and 10.4% for its Middle Market portfolio. The weighted-average annual effective yield is not reflective of what an investor in shares of Main Street’s common stock will realize on its investment because it does not reflect changes in the market value of Main Street’s stock, Main Street’s utilization of debt capital in its capital structure, Main Street’s expenses or any sales load paid by an investor. (c) The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Private Loan and Middle Market portfolios. These calculations exclude certain portfolio companies, including four LMM portfolio companies and two Private Loan portfolio companies, as EBITDA is not a meaningful valuation metric for Main Street’s investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate. As of December 31, 2022 LMM (a) Private Loan Middle Market (dollars in millions) Number of portfolio companies 78 85 31 Fair value $ 2,060.5 $ 1,471.5 $ 329.1 Cost $ 1,719.9 $ 1,500.3 $ 401.7 Debt investments as a % of portfolio (at cost) 73.7 % 97.1 % 93.8 % Equity investments as a % of portfolio (at cost) 26.3 % 2.9 % 6.2 % % of debt investments at cost secured by first priority lien 99.1 % 99.6 % 98.8 % Weighted-average annual effective yield (b) 12.3 % 11.6 % 11.0 % Average EBITDA (c) $ 8.0 $ 38.1 $ 68.7 ____________________ (a) At December 31, 2022, Main Street had equity ownership in all of its LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was 41%. (b) The weighted-average annual effective yields were computed using the effective interest rates for all debt investments at cost as of December 31, 2022, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status. The weighted-average annual effective yield on Main Street’s debt portfolio as of December 31, 2022 including debt investments on non-accrual status was 11.6% for its LMM portfolio, 11.2% for its Private Loan portfolio and 10.3% for its Middle Market portfolio. The weighted-average annual effective yield is not reflective of what an investor in shares of Main Street’s common stock will realize on its investment because it does not reflect changes in the market value of Main Street’s stock, Main Street’s utilization of debt capital in its capital structure, Main Street’s expenses or any sales load paid by an investor. (c) The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Private Loan and Middle Market portfolios. These calculations exclude certain portfolio companies, including three LMM portfolio companies and two Private Loan portfolio companies, as EBITDA is not a meaningful valuation metric for Main Street’s investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate. The following tables summarize the composition of Main Street’s total combined LMM, Private Loan and Middle Market portfolio investments at cost and fair value by type of investment as a percentage of the total combined LMM, Private Loan and Middle Market portfolio investments, as of March 31, 2023 and December 31, 2022 (this information excludes Other Portfolio investments, short-term portfolio investments and the External Investment Manager, which are discussed above). Cost: March 31, 2023 December 31, 2022 First lien debt 84.7 % 85.0 % Equity 14.6 14.2 Second lien debt 0.3 0.3 Equity warrants 0.2 0.2 Other 0.2 0.3 100.0 % 100.0 % Fair Value: March 31, 2023 December 31, 2022 First lien debt 74.6 % 75.2 % Equity 24.7 24.1 Second lien debt 0.4 0.3 Equity warrants 0.1 0.1 Other 0.2 0.3 100.0 % 100.0 % The following tables summarize the composition of Main Street’s total combined LMM, Private Loan and Middle Market portfolio investments by geographic region of the United States and other countries at cost and fair value as a percentage of the total combined LMM, Private Loan and Middle Market portfolio investments, as of March 31, 2023 and December 31, 2022 (this information excludes Other Portfolio investments, short-term portfolio investments and the External Investment Manager). The geographic composition is determined by the location of the corporate headquarters of the portfolio company. Cost: March 31, 2023 December 31, 2022 West 28.8 % 28.5 % Northeast 19.5 19.0 Southwest 19.1 20.1 Midwest 16.7 16.3 Southeast 13.9 14.0 Canada 0.4 0.6 Other Non-United States 1.6 1.5 100.0 % 100.0 % Fair Value: March 31, 2023 December 31, 2022 West 28.4 % 28.7 % Southwest 21.4 21.4 Northeast 19.1 18.8 Midwest 17.1 16.6 Southeast 12.2 12.4 Canada 0.3 0.6 Other Non-United States 1.5 1.5 100.0 % 100.0 % Main Street’s LMM, Private Loan and Middle Market portfolio investments are in companies conducting business in a variety of industries. The following tables summarize the composition of Main Street’s total combined LMM, Private Loan and Middle Market portfolio investments by industry at cost and fair value as of March 31, 2023 and December 31, 2022 (this information excludes Other Portfolio investments, short-term portfolio investments and the External Investment Manager). Cost: March 31, 2023 December 31, 2022 Internet Software & Services 8.0 % 8.0 % Machinery 7.3 7.4 Commercial Services & Supplies 6.7 6.7 Construction & Engineering 5.8 5.8 Distributors 5.2 5.1 Health Care Providers & Services 4.8 4.7 Diversified Consumer Services 4.6 4.5 Professional Services 4.6 4.2 Leisure Equipment & Products 4.5 4.5 IT Services 3.6 3.3 Specialty Retail 3.2 3.2 Energy Equipment & Services 3.1 3.7 Tobacco 3.1 3.1 Containers & Packaging 2.5 2.6 Media 2.4 2.4 Aerospace & Defense 2.4 2.3 Computers & Peripherals 2.2 2.2 Building Products 1.9 1.9 Software 1.9 1.9 Textiles, Apparel & Luxury Goods 1.8 1.9 Communications Equipment 1.8 1.8 Diversified Telecommunication Services 1.7 1.9 Auto Components 1.7 1.7 Food Products 1.6 1.6 Electronic Equipment, Instruments & Components 1.6 1.6 Diversified Financial Services 1.4 1.5 Internet & Catalog Retail 1.3 1.3 Health Care Equipment & Supplies 1.3 1.3 Food & Staples Retailing 1.1 1.2 Chemicals 1.1 1.1 Hotels, Restaurants & Leisure 1.1 1.1 Electrical Equipment 1.0 1.0 Household Products 1.0 0.4 Other (1) 2.7 3.1 100.0 % 100.0 % ____________________ (1) Includes various industries with each industry individually less than 1.0% of the total combined LMM, Private Loan and Middle Market portfolio investments at each date. Fair Value: March 31, 2023 December 31, 2022 Machinery 8.4 % 8.4 % Internet Software & Services 6.9 6.8 Diversified Consumer Services 6.8 6.8 Commercial Services & Supplies 6.0 6.1 Construction & Engineering 5.6 5.7 Distributors 5.6 5.5 Health Care Providers & Services 4.5 4.3 Professional Services 4.1 3.8 Leisure Equipment & Products 3.9 4.0 Specialty Retail 3.3 3.5 Tobacco 3.3 3.4 IT Services 3.3 3.1 Computers & Peripherals 3.1 3.0 Media 2.9 3.0 Energy Equipment & Services 2.7 2.7 Containers & Packaging 2.6 2.8 Aerospace & Defense 2.2 2.2 Software 2.1 2.1 Building Products 1.8 1.9 Food Products 1.8 1.8 Textiles, Apparel & Luxury Goods 1.6 1.8 Diversified Financial Services 1.6 1.7 Auto Components 1.6 1.6 Diversified Telecommunication Services 1.5 1.8 Internet & Catalog Retail 1.3 1.3 Chemicals 1.1 1.1 Construction Materials 1.1 1.0 Food & Staples Retailing 1.0 1.1 Health Care Equipment & Supplies 1.0 1.0 Electrical Equipment 1.0 1.0 Other (1) 6.3 5.7 100.0 100.0 ____________________ (1) Includes various industries with each industry individually less than 1.0% of the total combined LMM, Private Loan and Middle Market portfolio investments at each date.

EXTERNAL INVESTMENT MANAGER (Ta

EXTERNAL INVESTMENT MANAGER (Tables)	3 Months Ended
	Mar. 31, 2023
Investment Company [Abstract]
Schedule of Information From External Investment Manager	Summarized financial information from the separate financial statements of the External Investment Manager as of March 31, 2023 and December 31, 2022 and for the three months ended March 31, 2023 and 2022 is as follows: As of As of March 31, December 31, 2022 (dollars in thousands) Accounts receivable - advisory clients $ 9,405 $ 8,130 Intangible Asset 29,500 29,500 Total assets $ 38,905 $ 37,630 Accounts payable to MSCC and its subsidiaries $ 6,349 $ 4,455 Dividend payable to MSCC and its subsidiaries 3,056 3,675 Equity 29,500 29,500 Total liabilities and equity $ 38,905 $ 37,630 Three Months Ended March 31, 2023 2022 (dollars in thousands) Management fee income $ 5,470 $ 5,444 Incentive fees 3,304 137 Administrative services fees 151 151 Total revenues 8,925 5,732 Expenses allocated from MSCC or its subsidiaries: Salaries, share-based compensation and other personnel costs (4,268) (2,260) Other G&A expenses (730) (557) Total allocated expenses (4,998) (2,817) Pre-tax income 3,927 2,915 Tax expense (871) (642) Net income $ 3,056 $ 2,273

DEBT (Tables)

DEBT (Tables)	3 Months Ended
	Mar. 31, 2023
Debt Disclosure [Abstract]
Schedule of Debt	Summary of debt as of March 31, 2023 is as follows: Outstanding Unamortized Debt Issuance (Costs)/Premiums (1) Recorded Value Estimated Fair Value (2) (dollars in thousands) Corporate Facility $ 394,000 $ — $ 394,000 $ 394,000 SPV Facility 170,000 — 170,000 170,000 July 2026 Notes 500,000 (1,733) 498,267 438,945 May 2024 Notes 450,000 590 450,590 439,754 SBIC Debentures 334,000 (5,794) 328,206 261,555 December 2025 Notes 150,000 (1,422) 148,578 153,598 Total Debt $ 1,998,000 $ (8,359) $ 1,989,641 $ 1,857,852 ____________________ (1) The unamortized debt issuance costs for the Credit Facilities are reflected as Deferred financing costs on the Consolidated Balance Sheets, while the deferred debt issuance costs related to the July 2026 Notes, May 2024 Notes, December 2025 Notes and SBIC Debentures are reflected as contra-liabilities on the Consolidated Balance Sheets. (2) Estimated fair value for outstanding debt if Main Street had adopted the fair value option under ASC 825. See discussion of the methods used to estimate the fair value of Main Street’s debt in Note B.11. — Summary of Significant Accounting Policies — Fair Value of Financial Instruments. Summary of debt as of December 31, 2022 is as follows: Outstanding Unamortized Debt Issuance (Costs)/Premiums (1) Recorded Value Estimated Fair Value (2) (dollars in thousands) Corporate Facility $ 407,000 $ — $ 407,000 $ 407,000 SPV Facility 200,000 — 200,000 200,000 July 2026 Notes 500,000 (1,864) 498,136 434,250 May 2024 Notes 450,000 727 450,727 444,749 SBIC Debentures 350,000 (6,086) 343,914 290,204 December 2025 Notes 100,000 (675) 99,325 106,607 Total Debt $ 2,007,000 $ (7,898) $ 1,999,102 $ 1,882,810 ____________________ (1) The unamortized debt issuance costs for the Credit Facilities are reflected as Deferred financing costs on the Consolidated Balance Sheets, while the deferred debt issuance costs related to the July 2026 Notes, May 2024 Notes, December 2025 Notes and SBIC Debentures are reflected as contra-liabilities on the Consolidated Balance Sheets. (2) Estimated fair value for outstanding debt if Main Street had adopted the fair value option under ASC 825. See discussion of the methods used to estimate the fair value of Main Street’s debt in Note B.11. — Summary of Significant Accounting Policies — Fair Value of Financial Instruments.
Schedule of Interest Expense	Summarized interest expense for the three months ended March 31, 2023 and 2022 is as follows: Three Months Ended March 31, 2023 2022 (dollars in thousands) Corporate Facility $ 6,610 $ 2,059 SPV Facility 3,427 — July 2026 Notes 3,882 3,882 May 2024 Notes 5,714 5,714 SBIC Debentures 2,752 2,799 December 2025 Notes 2,612 — December 2022 Notes — 2,233 Total Interest Expense $ 24,997 $ 16,687
Schedule of Condensed Balance Sheet and Statement of Operations of MSCC Funding	MSCC Funding balance sheets as of March 31, 2023 and December 31, 2022 are as follows: Balance Sheets (dollars in thousands) March 31, 2023 December 31, 2022 (Unaudited) ASSETS Investments at fair value: Non-Control Investments (cost: $300,018 and $314,752 as of March 31, 2023 and December 31, 2022, respectively) $ 301,102 $ 316,507 Cash and cash equivalents 10,865 10,838 Interest and dividend receivable and other assets 3,281 2,828 Accounts receivable to MSCC and its subsidiaries — 556 Receivable for securities sold 62 369 Deferred financing costs (net of accumulated amortization of $282 and $141 as of March 31, 2023 and December 31, 2022, respectively) 2,679 2,630 Total assets 317,989 333,728 LIABILITIES SPV Facility $ 170,000 $ 200,000 Accounts payable and other liabilities 192 112 Interest payable 1,104 1,272 Total liabilities 171,296 201,384 NET ASSETS Contributed capital 136,883 126,010 Total undistributed earnings 9,810 6,334 Total net assets 146,693 132,344 Total liabilities and net assets $ 317,989 $ 333,728 MSCC Funding statement of operations for the three months ended March 31, 2023 are as follows: Statement of Operations (dollars in thousands) (Unaudited) March 31, 2023 INVESTMENT INCOME: Interest, fee and dividend income: Non‑Control/Non‑Affiliate investments $ 8,717 EXPENSES: Interest (3,428) Management Fee to MSCC (365) General and administrative (57) Total expenses (3,850) NET INVESTMENT INCOME (LOSS) 4,867 NET UNREALIZED APPRECIATION (DEPRECIATION): Non‑Control/Non‑Affiliate investments (1,391) SBIC debentures — Total net unrealized appreciation (depreciation) (1,391) NET INCREASE (DECREASE) IN NET ASSETS RESULTING FROM OPERATIONS $ 3,476

FINANCIAL HIGHLIGHTS (Tables)

FINANCIAL HIGHLIGHTS (Tables)	3 Months Ended
	Mar. 31, 2023
Investment Company [Abstract]
Schedule of Financial Highlights	Three Months Ended March 31, Per Share Data: 2023 2022 NAV at the beginning of the period $ 26.86 $ 25.29 Net investment income (1) 1.02 0.73 Net realized gain (loss) (1)(2) (0.36) 0.05 Net unrealized appreciation (depreciation) (1)(2) 0.44 0.20 Income tax benefit (provision) (1)(2) (0.10) (0.07) Net increase in net assets resulting from operations (1) 1.00 0.91 Dividends paid from net investment income (0.85) (0.72) Dividends paid (0.85) (0.72) Impact of the net change in monthly dividends declared prior to the end of the period and paid in the subsequent period (0.01) (0.01) Accretive effect of stock offerings (issuing shares above NAV per share) 0.15 0.35 Accretive effect of DRIP issuance (issuing shares above NAV per share) 0.03 0.03 Other (3) 0.05 0.04 NAV at the end of the period $ 27.23 $ 25.89 Market value at the end of the period $ 39.46 $ 42.64 Shares outstanding at the end of the period 79,794,089 72,370,407 ____________________ (1) Based on weighted-average number of common shares outstanding for the period. (2) Net realized gains or losses, net unrealized appreciation or depreciation, and income tax provision or benefit can fluctuate significantly from period to period. (3) Includes the impact of the different share amounts as a result of calculating certain per share data based on the weighted-average basic shares outstanding during the period and certain per share data based on the shares outstanding as of a period end or transaction date. Three Months Ended March 31, 2023 2022 (dollars in thousands) NAV at end of period $ 2,172,922 $ 1,873,654 Average NAV $ 2,140,754 $ 1,831,250 Average outstanding debt $ 1,992,000 $ 1,784,750 Ratio of total expenses, including income tax expense, to average NAV (1)(2) 2.21 % 1.76 % Ratio of operating expenses to average NAV (2)(3) 1.84 % 1.48 % Ratio of operating expenses, excluding interest expense, to average NAV (2)(3) 0.67 % 0.57 % Ratio of net investment income to average NAV (2) 3.78 % 2.85 % Portfolio turnover ratio (2) 1.54 % 6.49 % Total investment return (2)(4) 9.13 % (3.32) % Total return based on change in NAV (2)(5) 3.77 % 3.64 % ____________________ (1) Total expenses are the sum of operating expenses and net income tax provision. Net income tax provision includes the accrual of net deferred tax provision relating to the net unrealized appreciation or depreciation on portfolio investments held in Taxable Subsidiaries and due to the change in the loss carryforwards, which are non-cash in nature and may vary significantly from period to period. Main Street is required to include net deferred tax provision in calculating its total expenses even though these net deferred taxes are not currently payable or receivable. (2) Not annualized. (3) Unless otherwise noted, operating expenses include interest, compensation, general and administrative and share-based compensation expenses, net of expenses allocated to the External Investment Manager of $5.0 million and $2.8 million for the three months ended March 31, 2023 and 2022, respectively. (4) Total investment return is based on the purchase of stock at the current market price on the first day and a sale at the current market price on the last day of each period reported on the table and assumes reinvestment of dividends at prices obtained by Main Street’s dividend reinvestment plan during the period. The return does not reflect any sales load that may be paid by an investor. (5) Total return based on change in NAV was calculated using the sum of ending NAV plus dividends to stockholders and other non-operating changes during the period, divided by the beginning NAV. Non-operating changes include any items that affect NAV other than the net increase in net assets resulting from operations, such as the effects of stock offerings, shares issued under the DRIP and equity incentive plans and other miscellaneous items.

DIVIDENDS, DISTRIBUTIONS AND _2

DIVIDENDS, DISTRIBUTIONS AND TAXABLE INCOME (Tables)	3 Months Ended
	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Schedule of Taxable Income and To Total Distributions Declared to Common Stock Reconciliation	Listed below is a reconciliation of “Net increase in net assets resulting from operations” to taxable income and to total distributions declared to common stockholders for the three months ended March 31, 2023 and 2022. Three Months Ended March 31, 2023 2022 (estimated, dollars in thousands) Net increase in net assets resulting from operations $ 79,592 $ 65,203 Book-tax difference from share-based compensation expense 2,747 2,818 Net unrealized appreciation (35,118) (14,752) Income tax provision 8,114 5,097 Pre-tax book (income) loss not consolidated for tax purposes 15,791 (2,933) Book income and tax income differences, including debt origination, structuring fees, dividends, realized gains and changes in estimates 5,824 2,862 Estimated taxable income (1) 76,950 58,295 Taxable income earned in prior year and carried forward for distribution in current year 49,216 50,834 Taxable income earned prior to period end and carried forward for distribution next period (76,289) (72,844) Dividend payable as of period end and paid in the following period 18,036 15,519 Total distributions accrued or paid to common stockholders $ 67,913 $ 51,804 ____________________ (1) MSCC’s taxable income for each period is an estimate and will not be finally determined until the company files its tax return for each year. Therefore, the final taxable income, and the taxable income earned in each period and carried forward for distribution in the following period, may be different than this estimate.
Schedule of Components of Income Tax Expense (Benefit)	Main Street’s provision for income taxes was comprised of the following for the three months ended March 31, 2023 and 2022: Three Months Ended March 31, 2023 2022 (dollars in thousands) Current tax expense: Federal $ 140 $ 52 State 857 543 Excise 740 714 Total current tax expense 1,737 1,309 Deferred tax expense: Federal 5,806 2,807 State 571 981 Total deferred tax expense 6,377 3,788 Total income tax provision $ 8,114 $ 5,097

DIVIDEND REINVESTMENT PLAN (Tab

DIVIDEND REINVESTMENT PLAN (Tables)	3 Months Ended
	Mar. 31, 2023
Equity [Abstract]
Schedule of Summarized Dividend Reinvestment Plan Information	Summarized DRIP information for the three months ended March 31, 2023 and 2022 is as follows: Three Months Ended March 31, 2023 2022 (dollars in thousands) DRIP participation $ 7,808 $ 4,813 Shares issued for DRIP 199,282 114,043

SHARE-BASED COMPENSATION (Table

SHARE-BASED COMPENSATION (Tables)	3 Months Ended
	Mar. 31, 2023
Share-Based Payment Arrangement [Abstract]
Summarization of Restricted Stock Issued	The following table summarizes the restricted stock issuances approved by Main Street’s Board of Directors under the Equity and Incentive Plan, net of shares forfeited, if any, and the remaining shares of restricted stock available for issuance as of March 31, 2023. Restricted stock authorized under the plan 5,000,000 Less net restricted stock granted (48,792) Restricted stock available for issuance as of March 31, 2023 4,951,208 As of March 31, 2023, the following table summarizes the restricted stock issued to Main Street’s non-employee directors and the remaining shares of restricted stock available for issuance pursuant to the Main Street Capital Corporation 2022 Non-Employee Director Restricted Stock Plan. These shares are granted upon appointment or election to the board and vest on the day immediately preceding the annual meeting of stockholders following the respective grant date and are expensed over such service period. Restricted stock authorized under the plan 300,000 Less net restricted stock granted (3,825) Restricted stock available for issuance as of March 31, 2023 296,175
Schedule of Summarized Restricted Stock Awards	Summarized RSAs for the three months ended March 31, 2023 is as follows: Three Months Ended March 31, 2023 Number Weighted-Average Grant-Date Fair Value Restricted Stock Awards (RSAs): of Shares ( $ per share) Non-vested, December 31, 2022 817,401 $ 38.78 Granted (1) 34,547 38.70 Vested (1)(2) (35,092) 39.16 Forfeited (7,581) 40.72 Non-vested, March 31, 2023 809,275 $ 38.74 Aggregate intrinsic value as of March 31, 2023 (in thousands) $ 31,934 (3) ___________________________ (1) Restricted units generally vest over a three-year period from the grant date (as noted above). (2) Vested shares included 10,489 shares withheld for payroll taxes paid on behalf of employees. (3) Aggregate intrinsic value is the product of total non-vested restricted shares as of March 31, 2023 and $39.46 per share, the closing price of our common stock on March 31, 2023.

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	3 Months Ended
	Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Schedule of Outstanding Commitments	At March 31, 2023, Main Street had the following outstanding commitments (in thousands): Investments with equity capital commitments that have not yet funded: Amount Brightwood Capital Fund Investments Brightwood Capital Fund V, LP $ 3,000 Brightwood Capital Fund III, LP 300 3,300 Freeport Fund Investments Freeport First Lien Loan Fund III LP 6,733 Freeport Financial SBIC Fund LP 3,841 10,574 Harris Preston Fund Investments HPEP 4, L.P. 7,668 HPEP 3, L.P. 1,555 HPEP 423 COR, LP 600 2717 MH, L.P. 52 9,875 MS Private Loan Fund I, LP 750 UnionRock Energy Fund II, LP 2,124 Total Equity Commitments (1)(2) $ 26,623 Investments with commitments to fund revolving loans that have not been fully drawn or term loans with additional commitments not yet funded: Dalton US Inc. $ 16,865 Xenon Arc, Inc. 11,340 HEADLANDS OP-CO LLC 10,125 MS Private Loan Fund I, LP 10,000 JTI Electrical & Mechanical, LLC 8,421 PTL US Bidco, Inc 8,110 AMEREQUIP LLC. 7,704 SI East, LLC 7,500 NinjaTrader, LLC 7,472 Archer Systems, LLC 7,115 Veregy Consolidated, Inc. 5,875 Robbins Bros. Jewelry, Inc. 4,500 South Coast Terminals Holdings, LLC 4,465 Winter Services LLC 4,444 Channel Partners Intermediateco, LLC 4,346 Direct Marketing Solutions, Inc. 4,250 Bettercloud, Inc. 4,189 Microbe Formulas, LLC 3,601 Watterson Brands, LLC 3,453 Classic H&G Holdco, LLC 3,440 Paragon Healthcare, Inc. 3,245 VVS Holdco, LLC 3,200 SPAU Holdings, LLC 3,194 MetalForming AcquireCo, LLC 2,795 Batjer TopCo, LLC 2,700 Infolinks Media Buyco, LLC 2,520 IG Parent Corporation 2,500 Nebraska Vet AcquireCo, LLC 2,500 CaseWorthy, Inc. 2,459 West Star Aviation Acquisition, LLC 2,411 Centre Technologies Holdings, LLC 2,400 GRT Rubber Technologies LLC 2,385 ArborWorks, LLC 2,339 NWN Corporation 2,335 Bluestem Brands, Inc. 2,154 MB2 Dental Solutions, LLC 2,023 PPL RVs, Inc. 2,000 The Affiliati Network, LLC 2,000 Cody Pools, Inc. 1,896 Elgin AcquireCo, LLC 1,877 GULF PACIFIC ACQUISITION, LLC 1,868 Mako Steel, LP 1,826 Johnson Downie Opco, LLC 1,800 Career Team Holdings, LLC 1,800 Engineering Research & Consulting, LLC 1,638 MonitorUS Holding, LLC 1,634 Trantech Radiator Topco, LLC 1,600 Colonial Electric Company LLC 1,600 Chamberlin Holding LLC 1,600 Roof Opco, LLC 1,556 Burning Glass Intermediate Holding Company, Inc. 1,549 Pearl Meyer Topco LLC 1,500 AVEX Aviation Holdings, LLC 1,474 ATS Operating, LLC 1,440 RTIC Subsidiary Holdings, LLC 1,370 American Health Staffing Group, Inc. 1,333 Evergreen North America Acquisitions, LLC 1,313 Project Eagle Holdings, LLC 1,250 Gamber-Johnson Holdings, LLC 1,200 GS HVAM Intermediate, LLC 1,136 AB Centers Acquisition Corporation 1,112 KMS, LLC 1,086 Wahoo Fitness Acquisition L.L.C. 1,000 Eastern Wholesale Fence LLC 967 RA Outdoors LLC 894 Orttech Holdings, LLC 800 Mystic Logistics Holdings, LLC 800 Project BarFly, LLC 760 DTE Enterprises, LLC 750 Jensen Jewelers of Idaho, LLC 500 Jackmont Hospitality, Inc. 400 Clad-Rex Steel, LLC 400 Wall Street Prep, Inc. 400 Gulf Publishing Holdings, LLC 400 Flame King Holdings, LLC 400 Adams Publishing Group, LLC 394 Invincible Boat Company, LLC. 353 ASC Interests, LLC 300 AAC Holdings, Inc. 240 Acousti Engineering Company of Florida 53 Acumera, Inc. 15 Interface Security Systems, L.L.C 1 Total Loan Commitments 228,660 Total Commitments $ 255,283 ____________________ (1) This table excludes commitments related to six additional Other Portfolio investments for which the investment period has expired and remaining commitments may only be drawn to pay fund expenses. The Company does not expect any material future capital to be called on its commitment to these investments and as a result has excluded those commitments from this table. (2) This table excludes commitments related to three additional Other Portfolio investments for which the investment period has expired and remaining commitments may only be drawn to pay fund expenses or for follow on investments in existing portfolio companies. The Company does not expect any material future capital to be called on its commitment to these investments to pay fund expenses, and based on representations from the fund manager, the Company does not expect any further capital will be called on its commitment for follow on investments. As a result, the Company has excluded those commitments from this table.

Consolidated Schedule of Inve_4

Consolidated Schedule of Investments In and Advances to Affiliates (Tables)	3 Months Ended
	Mar. 31, 2023
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Schedule of Investments in and Advances to Affiliates, Schedule of Investments	Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross March 31, Majority-owned investments ASK (Analytical Systems Keco Holdings, LLC) L+ 10.00% Secured Debt (8) $ — $ — $ 1 $ (3) $ 1 $ — $ (2) 14.75% L+ 10.00% Secured Debt (8) — — 188 4,545 20 70 4,495 14.13% Preferred Member Units (8) — — — — — — — Preferred Member Units (8) — 84 — 3,504 84 — 3,588 Warrants (8) — — — — — — — Brewer Crane Holdings, LLC 14.66% L+ 10.00% Secured Debt (9) — — 212 5,964 — 124 5,840 Preferred Member Units (9) — (520) 30 7,080 — 520 6,560 Café Brazil, LLC Member Units (8) — (370) 16 2,210 — 370 1,840 California Splendor Holdings LLC 14.88% L+ 10.00% Secured Debt (9) — (3) 1,045 28,000 3 3 28,000 Preferred Member Units (9) — — 63 25,495 — — 25,495 15.00% 15.00% Preferred Member Units (9) — — 150 3,994 150 — 4,144 Clad-Rex Steel, LLC SF+ 9.00% Secured Debt (5) — — 1 — — — — 13.79% SF+ 9.00% Secured Debt (5) — — 369 10,440 11 480 9,971 10.00% Secured Debt (5) — — 26 1,039 — 8 1,031 Member Units (5) — (1,050) 50 8,220 — 1,050 7,170 Member Units (5) — 220 — 610 220 — 830 CMS Minerals Investments Member Units (9) — (431) 44 1,670 — 435 1,235 Cody Pools, Inc. 15.50% L+ 10.50% Secured Debt (8) — 11 59 1,462 13 421 1,054 15.50% L+ 10.50% Secured Debt (8) — (20) 1,577 40,801 20 444 40,377 Preferred Member Units (8) — 970 29 58,180 970 — 59,150 CompareNetworks Topco, LLC L+ 9.00% Secured Debt (9) — — — — — — — 13.75% L+ 9.00% Secured Debt (9) — (3) 180 5,241 3 375 4,869 Preferred Member Units (9) — (1,390) 158 19,830 — 1,390 18,440 Datacom, LLC 7.50% Secured Debt (8) — — 4 223 227 — 450 10.00% Secured Debt (8) — — 254 7,789 39 67 7,761 Preferred Member Units (8) — — — 2,670 — — 2,670 Direct Marketing Solutions, Inc. Secured Debt (9) — (7) 11 — 7 7 — 14.00% Secured Debt (9) — (14) 959 27,267 14 405 26,876 Preferred Stock (9) — (520) 171 22,220 — 520 21,700 Elgin AcquireCo, LLC SF+ 6.00% Secured Debt (5) — — 2 (9) 1 — (8) 12.00% Secured Debt (5) — — 573 18,594 10 — 18,604 9.00% Secured Debt (5) — — 144 6,294 1 11 6,284 Common Stock (5) — — — 7,603 — — 7,603 Common Stock (5) — — — 1,558 — — 1,558 Gamber-Johnson Holdings, LLC SF+ 8.50% Secured Debt (5) — — 2 — — — — 11.50% SF+ 8.50% Secured Debt (5) — (24) 1,852 64,078 24 824 63,278 Member Units (5) — 8,480 1,567 50,890 8,480 — 59,370 GRT Rubber Technologies LLC 10.66% L+ 6.00% Secured Debt (8) — — 28 670 295 — 965 12.66% L+ 8.00% Secured Debt (8) — (12) 1,280 40,493 12 12 40,493 Member Units (8) — — 42 44,440 — — 44,440 Gulf Publishing Holdings, LLC L+ 9.50% Secured Debt (8) — — — — — — — Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross March 31, 12.50% Secured Debt (8) — — 75 2,284 — — 2,284 Preferred Equity (8) — — — 3,780 — — 3,780 Member Units (8) — — — — — — — Jensen Jewelers of Idaho, LLC P+ 6.75% Secured Debt (9) — — — — — — — 14.50% P+ 6.75% Secured Debt (9) — (2) 90 2,450 2 2 2,450 Member Units (9) — (120) 129 14,970 — 120 14,850 Kickhaefer Manufacturing Company, LLC 12.00% Secured Debt (5) — — 780 20,374 192 — 20,566 9.00% Secured Debt (5) — — 88 3,842 — 9 3,833 Preferred Equity (5) — — — 7,220 — — 7,220 Member Units (5) — (70) 29 2,850 — 70 2,780 Market Force Information, LLC 15.75% L+ 11.00% Secured Debt (9) — (6,725) 260 6,090 635 6,725 — 12.00% 12.00% Secured Debt (9) — (1,610) — 1,610 — 1,610 — Member Units (9) — — — — — — — MetalForming AcquireCo, LLC Secured Debt (7) — — 3 — — — — 12.75% Secured Debt (7) — — 739 23,576 12 — 23,588 8.00% 8.00% Preferred Equity (7) — — 148 6,010 117 — 6,127 Common Stock (7) — — 327 1,537 — — 1,537 MH Corbin Holding LLC 13.00% Secured Debt (5) — 952 196 4,548 952 116 5,384 Preferred Member Units (5) — — — — — — — Preferred Member Units (5) — — — — — — — MSC Adviser I, LLC Member Units (8) — 9,720 3,057 122,930 9,720 — 132,650 Mystic Logistics Holdings, LLC Secured Debt (6) — — 1 — — — — 10.00% Secured Debt (6) — — 144 5,746 — — 5,746 Common Stock (6) — 2,180 992 22,830 2,180 — 25,010 OMi Topco, LLC 12.00% Secured Debt (8) — (13) 485 15,750 13 763 15,000 Preferred Member Units (8) — 2,290 675 22,810 2,290 — 25,100 PPL RVs, Inc. L+ 7.00% Secured Debt (8) — — — — — — — 11.38% L+ 7.00% Secured Debt (8) — (13) 629 21,655 13 13 21,655 Common Stock (8) — — 104 18,950 — — 18,950 Common Stock (8) — (68) — 238 — 68 170 Principle Environmental, LLC Secured Debt (8) — — — — — — — 13.00% Secured Debt (8) — — 198 5,806 6 — 5,812 Preferred Member Units (8) — (1,940) 286 12,420 — 1,940 10,480 Common Stock (8) — (90) — 590 — 90 500 Quality Lease Service, LLC Member Units (7) — — — 525 — — 525 Robbins Bros. Jewelry, Inc. Secured Debt (9) — — 8 (35) 2 — (33) 12.50% Secured Debt (9) — — 1,128 35,404 19 225 35,198 Preferred Equity (9) — (4,950) — 14,880 — 4,950 9,930 Trantech Radiator Topco, LLC Secured Debt (7) — (1) 2 — 1 1 — 12.00% Secured Debt (7) — (5) 242 7,920 5 5 7,920 Common Stock (7) — 1,510 29 7,800 1,506 — 9,306 Volusion, LLC 10.00% Secured Debt (8) — — — — 2,100 — 2,100 Secured Debt (8) (3,188) 1,821 166 14,914 — 14,914 — Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross March 31, Unsecured Convertible Debt (8) (409) 409 — — 409 409 — Preferred Member Units (8) — — — — — — — Preferred Member Units (8) — — — — 11,446 — 11,446 Preferred Member Units (8) — — — — — — — Common Stock (8) — (2,576) — — 2,576 2,576 — Warrants (8) — 2,576 — — — — — Ziegler’s NYPD, LLC 12.00% Secured Debt (8) — — 14 450 — — 450 6.50% Secured Debt (8) — — 16 945 — — 945 14.00% Secured Debt (8) — (215) 96 2,676 — 215 2,461 Preferred Member Units (8) — (170) — 240 — 170 70 Warrants (8) — — — — — — — Other controlled investments 2717 MH, L.P. LP Interests (2717 MH, L.P.) (8) 631 (675) 141 7,552 1,031 1,574 7,009 LP Interests (2717 HPP-MS, L.P.) (8) — — — 248 — — 248 ASC Interests, LLC 13.00% Secured Debt (8) — — 13 400 — — 400 13.00% Secured Debt (8) — — 54 1,649 — — 1,649 Member Units (8) — (100) — 800 — 100 700 ATS Workholding, LLC 5.00% Secured Debt (9) — (132) — 634 21 132 523 5.00% Secured Debt (9) — (186) — 1,005 — 185 820 Preferred Member Units (9) — — — — — — — Barfly Ventures, LLC 7.00% Secured Debt (5) — — 30 711 — — 711 Member Units (5) — (280) — 3,320 — 283 3,037 Batjer TopCo, LLC Secured Debt (8) — — — (8) 1 — (7) Secured Debt (8) — — — — — — — 11.00% Secured Debt (8) — — 311 10,933 9 450 10,492 Preferred Stock (8) — 2,055 167 4,095 2,055 — 6,150 Bolder Panther Group, LLC Secured Debt (9) — — 1 — — — — 13.91% SF+ 9.22% Secured Debt (9) — (36) 3,431 99,194 36 695 98,535 8.00% Class B Preferred Member Units (9) — — 1,096 31,420 — — 31,420 Bridge Capital Solutions Corporation 13.00% Secured Debt (6) — — 286 8,813 — — 8,813 13.00% Secured Debt (6) — — 32 1,000 — — 1,000 Preferred Member Units (6) — — 25 1,000 — — 1,000 Warrants (6) — — — 1,828 — — 1,828 Warrants (6) — — — 2,512 — — 2,512 CBT Nuggets, LLC Member Units (9) — 860 1,235 49,002 858 — 49,860 Centre Technologies Holdings, LLC L+ 9.00% Secured Debt (8) — — 3 — — — — 13.75% L+ 9.00% Secured Debt (8) — — 517 14,954 6 — 14,960 Preferred Member Units (8) — 560 30 8,700 560 — 9,260 Chamberlin Holding LLC SF+ 6.00% Secured Debt (8) — — 2 — — — — 12.86% SF+ 8.00% Secured Debt (8) — (6) 540 16,945 6 6 16,945 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross March 31, Member Units (8) — (120) 285 22,920 — 120 22,800 Member Units (8) — 120 23 2,710 120 — 2,830 Charps, LLC 10.00% Unsecured Debt (5) — (9) 149 5,694 9 9 5,694 Preferred Member Units (5) — 210 196 13,340 210 — 13,550 Colonial Electric Company LLC Secured Debt (6) — — 2 — — — — 12.00% Secured Debt (6) — — 704 23,151 14 315 22,850 Preferred Member Units (6) — (960) (1,273) 9,160 — 960 8,200 Copper Trail Energy Fund I, LP - CTMH LP Interests (CTMH, LP) (9) — — — 588 — — 588 Digital Products Holdings LLC 14.75% L+ 10.00% Secured Debt (5) — — 564 15,523 9 329 15,203 Preferred Member Units (5) — — 50 9,835 — — 9,835 Garreco, LLC 12.00% L+ 10.00% Secured Debt (8) — — 112 3,826 — 277 3,549 Member Units (8) — (220) 12 1,800 — 220 1,580 Gulf Manufacturing, LLC Member Units (8) — 580 718 6,790 580 — 7,370 Harrison Hydra-Gen, Ltd. Common Stock (8) — 210 — 3,280 210 — 3,490 Johnson Downie Opco, LLC L+ 11.50% Secured Debt (8) — (1) 3 — 1 1 — 16.25% L+ 11.50% Secured Debt (8) — (5) 407 9,999 5 5 9,999 Preferred Equity (8) — 1,010 71 5,540 1,010 — 6,550 JorVet Holdings, LLC 12.00% Secured Debt (9) — — 782 25,432 13 — 25,445 Preferred Equity (9) — — 221 10,741 — — 10,741 KBK Industries, LLC 10.00% Secured Debt (5) — 56 184 — 6,000 250 5,750 Member Units (5) — (3,590) 6,134 15,570 — 3,590 11,980 MS Private Loan Fund Secured Debt (8) — — 6 — — — — Secured Debt (8) — — — — — — — LP Interests (8) — (58) 370 14,833 — 58 14,775 MSC Income Fund, Inc. Common Equity (8) — 7 15 753 7 — 760 NAPCO Precast, LLC Member Units (8) — 670 — 11,830 670 — 12,500 Nebraska Vet AcquireCo, LLC (NVS) L+ 7.00% Secured Debt (5) — — 2 — — — — 12.00% Secured Debt (5) — (10) 613 20,094 10 10 20,094 12.00% Secured Debt (5) — (5) 320 10,500 5 5 10,500 Preferred Member Units (5) — 3,520 125 7,700 3,520 — 11,220 NexRev LLC Secured Debt (8) — — — — — — — 11.00% Secured Debt (8) — 1,000 320 8,477 1,022 629 8,870 Preferred Member Units (8) — 1,880 131 1,110 1,880 — 2,990 NRP Jones, LLC 12.00% Secured Debt (5) — — 62 2,080 — — 2,080 Member Units (5) — 279 13 4,615 278 — 4,893 Member Units (5) — 11 (2) 175 12 — 187 NuStep, LLC 11.25% L+ 6.50% Secured Debt (5) — — 122 4,399 — — 4,399 12.00% Secured Debt (5) — — 556 18,414 3 — 18,417 Preferred Member Units (5) — (410) — 8,040 — 410 7,630 Preferred Member Units (5) — — — 5,150 — — 5,150 Orttech Holdings, LLC L+ 11.00% Secured Debt (5) — — — — — — — 15.75% L+ 11.00% Secured Debt (5) — — 924 23,429 17 800 22,646 Preferred Stock (5) — 1,750 269 11,750 1,750 — 13,500 Pearl Meyer Topco LLC 12.00% Secured Debt (6) — 5 29 — 3,500 — 3,500 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross March 31, 12.00% Secured Debt (6) — 38 142 — 11,500 — 11,500 12.00% Secured Debt (6) — (20) 868 28,681 20 1,020 27,681 Preferred Equity (6) — 280 2,879 43,260 280 — 43,540 River Aggregates, LLC Member Units (8) — — — 3,620 — — 3,620 Tedder Industries, LLC 12.00% Secured Debt (9) — — 55 1,840 — — 1,840 12.00% Secured Debt (9) — — 459 15,120 3 — 15,123 Preferred Member Units (9) — (810) — 7,681 — 810 6,871 Preferred Member Units (9) — 111 — — 333 — 333 Televerde, LLC Member Units (8) — 1,191 171 5,408 1,191 — 6,599 Preferred Stock (8) — — — 1,794 — — 1,794 Vision Interests, Inc. Series A Preferred Stock (9) — — 168 3,000 — — 3,000 VVS Holdco LLC L+ 6.00% Secured Debt (5) — — 8 (21) 6 — (15) 11.50% Secured Debt (5) — — 889 30,161 15 — 30,176 Preferred Equity (5) — 100 38 11,940 100 — 12,040 — — — — — — — — — — — — — — Other — — — — — — — Amounts related to investments transferred to or from other 1940 Act classification during the period — — (171) (14,914) — — — Total Control investments $ (2,966) $ 17,161 $ 48,862 $ 1,703,172 $ 83,687 $ 55,770 $ 1,746,003 Affiliate Investments AAC Holdings, Inc. 18.00% Secured Debt (7) $ — $ (6) $ — $ — $ 315 $ 6 $ 309 18.00% 18.00% Secured Debt (7) — (268) 572 11,550 572 267 11,855 Common Stock (7) — — — — — — — Warrants (7) — — — — — — — AFG Capital Group, LLC Preferred Member Units (8) — — — 9,400 — — 9,400 ATX Networks Corp. L+ 7.50% Secured Debt (6) — (134) 886 6,343 575 6,918 — 10.00% Unsecured Debt (6) — (306) 1,160 2,598 1,160 3,758 — Common Stock (6) 3,248 (3,270) — 3,270 3,248 6,518 — BBB Tank Services, LLC 15.66% L+ 11.00% Unsecured Debt (8) — — 31 800 — — 800 15.66% L+ 11.00% Unsecured Debt (8) — — 155 2,086 — — 2,086 Member Units (8) — — — — — — — 15.00% Preferred Stock (non-voting) (8) — — — — — — — Boccella Precast Products LLC 10.00% Secured Debt (6) — — 8 320 — — 320 Member Units (6) — (200) 29 2,970 — 200 2,770 Buca C, LLC 12.00% Secured Debt (7) — — 521 12,337 — 375 11,962 6.00% 6.00% Preferred Member Units (7) — — — — — — — Career Team Holdings, LLC L+ 6.00% Secured Debt (6) — — 2 (9) 1 1 (9) 12.50% Secured Debt (6) — — 643 20,090 10 — 20,100 Common Stock (6) — — — 4,500 — — 4,500 Chandler Signs Holdings, LLC Class A Units (8) — 210 36 1,790 210 — 2,000 Classic H&G Holdings, LLC 10.88% L+ 6.00% Secured Debt (6) — — 127 4,560 — — 4,560 8.00% Secured Debt (6) — (11) 396 19,274 11 11 19,274 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross March 31, Preferred Member Units (6) — 1,062 780 24,637 1,063 — 25,700 Congruent Credit Opportunities Funds LP Interests (Congruent Credit Opportunities Fund III, LP) (8) — — 123 7,657 — 876 6,781 DMA Industries, LLC 12.00% Secured Debt (7) — (11) 647 21,200 11 11 21,200 Preferred Equity (7) — — — 7,260 — — 7,260 Dos Rios Partners LP Interests (Dos Rios Partners, LP) (8) — 156 — 9,127 156 — 9,283 LP Interests (Dos Rios Partners - A, LP) (8) — — — 2,898 — — 2,898 Dos Rios Stone Products LLC Class A Preferred Units (8) — 250 — 1,330 250 — 1,580 EIG Fund Investments LP Interests (EIG Global Private Debt Fund-A, L.P.) (8) 14 — 19 1,013 15 52 976 Flame King Holdings, LLC 11.25% L+ 6.50% Secured Debt (9) — (4) 215 7,600 4 4 7,600 13.75% L+ 9.00% Secured Debt (9) — (11) 730 21,200 11 11 21,200 Preferred Equity (9) — 3,610 538 17,580 3,610 — 21,190 Freeport Financial SBIC Fund LP LP Interests (Freeport Financial SBIC Fund LP) (5) — — — 3,483 — — 3,483 LP Interests (Freeport First Lien Loan Fund III LP) (5) — — 134 5,848 — 536 5,312 GFG Group, LLC. 9.00% Secured Debt (5) — (6) 261 11,345 6 6 11,345 Preferred Member Units (5) — 450 39 7,140 450 — 7,590 Hawk Ridge Systems, LLC 10.75% L+ 6.00% Secured Debt (9) — — 90 3,185 815 — 4,000 10.00% Secured Debt (9) — (10) 893 37,800 10 10 37,800 Preferred Member Units (9) — — 65 17,460 — — 17,460 Preferred Member Units (9) — — — 920 — — 920 Houston Plating and Coatings, LLC 8.00% Unsecured Convertible Debt (8) — (170) 60 3,000 — 170 2,830 Member Units (8) — 600 2 2,400 600 — 3,000 HPEP 3, L.P. LP Interests (HPEP 3, L.P.) (8) — 113 — 4,331 113 508 3,936 LP Interests (HPEP 4, L.P.) (8) — — — 2,332 — — 2,332 LP Interests (423 COR, LP) (8) — — 117 1,400 — — 1,400 I-45 SLF LLC Member Units (Fully diluted 20.0%; 21.75% profits interest) (8) — — 528 11,758 1,200 — 12,958 Infinity X1 Holdings, LLC 13.00% Secured Debt (9) — — 183 — 17,823 — 17,823 Preferred Equity (9) — — — — 4,000 — 4,000 Iron-Main Investments, LLC 13.50% Secured Debt (5) — — 151 4,500 2 — 4,502 13.50% Secured Debt (5) — — 105 3,130 2 — 3,132 13.50% Secured Debt (5) — — 294 8,944 — — 8,944 13.50% Secured Debt (5) — — 658 19,559 9 — 19,568 13.50% Secured Debt (5) — — 489 — 10,836 — 10,836 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross March 31, Common Stock (5) — — — 1,798 958 — 2,756 OnAsset Intelligence, Inc. 12.00% 12.00% Secured Debt (8) — (6) — 569 — 6 563 12.00% 12.00% Secured Debt (8) — (6) — 580 — 6 574 12.00% 12.00% Secured Debt (8) — (14) — 1,249 — 13 1,236 12.00% 12.00% Secured Debt (8) — (28) — 2,606 — 29 2,577 10.00% 10.00% Unsecured Debt (8) — — — 305 — — 305 7.00% 7.00% Preferred Stock (8) — — — — — — — Common Stock (8) — — — — — — — Warrants (8) — — — — — — — Oneliance, LLC L+ 11.00% Secured Debt (7) — — — — — — — 15.75% L+ 11.00% Secured Debt (7) — — 219 5,559 3 80 5,482 Preferred Stock (7) — — — 1,056 — — 1,056 Rocaceia, LLC (Quality Lease and Rental Holdings, LLC) Secured Debt (8) (29,526) 29,865 — — 29,865 29,865 — Preferred Member Units (8) — — — — — — — SI East, LLC (Stavig) Secured Debt (7) — — 7 — — — — 9.50% Secured Debt (7) — (33) 2,144 89,786 33 5,283 84,536 Preferred Member Units (7) — — 343 13,650 — — 13,650 Slick Innovations, LLC 14.00% Secured Debt (6) — (9) 492 13,840 9 249 13,600 Common Stock (6) — 260 — 1,530 260 — 1,790 Sonic Systems International, LLC 12.26% L+ 7.50% Secured Debt (8) — (17) 499 15,769 17 17 15,769 Common Stock (8) — (50) 11 1,280 — 50 1,230 Student Resource Center, LLC 13.69% L+ 8.50% Secured Debt (6) — — 108 4,556 — — 4,556 Preferred Equity (6) — — — — — — — Superior Rigging & Erecting Co. 12.00% Secured Debt (7) — — 652 21,378 17 1,000 20,395 Preferred Member Units (7) — 470 — 4,500 470 — 4,970 The Affiliati Network, LLC Secured Debt (9) — — 7 106 1,321 1,440 (13) 12.00% Secured Debt (9) — — 293 9,442 7 200 9,249 Preferred Stock (9) — — 80 6,400 — — 6,400 UnionRock Energy Fund II, LP LP Interests (9) — — — 5,855 530 197 6,188 UniTek Global Services, Inc. 14.22% SF+ 7.50% 2.00% Secured Debt (6) — 23 12 382 25 — 407 14.22% SF+ 7.50% 2.00% Secured Debt (6) — 102 62 1,712 112 3 1,821 15.00% 15.00% Secured Convertible Debt (6) — 262 91 4,592 353 — 4,945 20.00% 20.00% Preferred Stock (6) — (107) 107 2,833 107 107 2,833 20.00% 20.00% Preferred Stock (6) — 385 — 1,991 385 — 2,376 19.00% 19.00% Preferred Stock (6) — — — — — — — 13.50% 13.50% Preferred Stock (6) — — — — — — — Common Stock (6) — — — — — — — Universal Wellhead Services Holdings, LLC 14.00% 14.00% Preferred Member Units (8) — — — 220 — 2 218 Member Units (8) — — — — — — — World Micro Holdings, LLC 13.00% Secured Debt (7) — — 471 14,140 7 — 14,147 Preferred Equity (7) — — — 3,845 — — 3,845 Other — — — — — — — Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross March 31, Amounts related to investments transferred to or from other 1940 Act classification during the period — — 171 14,914 — — — Total Affiliate investments $ (26,264) $ 33,141 $ 17,456 $ 618,359 $ 81,567 $ 58,785 $ 626,227 ____________________ (1) The principal amount, the ownership detail for equity investments and if the investment is income producing is included in the Consolidated Schedule of Investments included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q. (2) Represents the total amount of interest, fees and dividends credited to income for the portion of the period for which an investment was included in Control or Affiliate categories, respectively. For investments transferred between Control and Affiliate categories during the period, any income or investment balances related to the time period it was in the category other than the one shown at period end is included in “Amounts related to investments transferred from other 1940 Act classifications during the period.” (3) Gross additions include increases in the cost basis of investments resulting from new portfolio investments, follow-on investments and accrued PIK interest, and the exchange of one or more existing securities for one or more new securities. Gross additions also include net increases in unrealized appreciation or net decreases in net unrealized depreciation as well as the movement of an existing portfolio company into this category and out of a different category. (4) Gross reductions include decreases in the cost basis of investments resulting from principal repayments or sales and the exchange of one or more existing securities for one or more new securities. Gross reductions also include net increases in net unrealized depreciation or net decreases in unrealized appreciation as well as the movement of an existing portfolio company out of this category and into a different category. (5) Portfolio company located in the Midwest region as determined by location of the corporate headquarters. The fair value as of March 31, 2023 for control investments located in this region was $444,151. This represented 25.4% of net assets as of March 31, 2023. The fair value as of March 31, 2023 for affiliate investments located in this region was $77,468. This represented 12.4% of net assets as of March 31, 2023. (6) Portfolio company located in the Northeast region and Canada as determined by location of the corporate headquarters. The fair value as of March 31, 2023 for control investments located in this region was $163,180. This represented 9.3% of net assets as of March 31, 2023. The fair value as of March 31, 2023 for affiliate investments located in this region was $109,543. This represented 17.5% of net assets as of March 31, 2023. (7) Portfolio company located in the Southeast region as determined by location of the corporate headquarters. The fair value as of March 31, 2023 for control investments located in this region was $49,003. This represented 2.8% of net assets as of March 31, 2023. The fair value as of March 31, 2023 for affiliate investments located in this region was $200,667. This represented 32.0% of net assets as of March 31, 2023. (8) Portfolio company located in the Southwest region as determined by location of the corporate headquarters. The fair value as of March 31, 2023 for control investments located in this region was $639,016. This represented 36.6% of net assets as of March 31, 2023. The fair value as of March 31, 2023 for affiliate investments located in this region was $84,732. This represented 13.5% of net assets as of March 31, 2023. (9) Portfolio company located in the West region as determined by location of the corporate headquarters. The fair value as of March 31, 2023 for control investments located in this region was $450,653. This represented 25.8% of net assets as of March 31, 2023. The fair value as of March 31, 2023 for affiliate investments located in this region was $153,817. This represented 24.6% of net assets as of March 31, 2023. (10) All of the Company’s portfolio investments are generally subject to restrictions on resale as “restricted securities,” unless otherwise noted. (11) This schedule should be read in conjunction with the Consolidated Schedule of Investments and Notes to the Consolidated Financial Statements included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q. Supplemental information can be located within the Consolidated Schedule of Investments including end of period interest rate, preferred dividend rate, maturity date, investments not paid currently in cash and investments whose value was determined using significant unobservable inputs. (12) Investment has an unfunded commitment as of March 31, 2023 (see Note K ). The fair value of the investment includes the impact of the fair value of any unfunded commitments. (13) Negative fair value is the result of the capitalized discount being greater than the principal amount outstanding on the loan. ________________ (1) The principal amount, the ownership detail for equity investments and if the investment is income producing is included in the Consolidated Schedule of Investments included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q. (2) Represents the total amount of interest, fees and dividends credited to income for the portion of the period for which an investment was included in Control or Affiliate categories, respectively. For investments transferred between Control and Affiliate categories during the period, any income or investment balances related to the time period it was in the category other than the one shown at period end is included in “Amounts from investments transferred from other 1940 Act classifications during the period.” (3) Gross additions include increases in the cost basis of investments resulting from new portfolio investments, follow-on investments and accrued PIK interest, and the exchange of one or more existing securities for one or more new securities. Gross additions also include net increases in unrealized appreciation or net decreases in net unrealized depreciation as well as the movement of an existing portfolio company into this category and out of a different category. (4) Gross reductions include decreases in the cost basis of investments resulting from principal repayments or sales and the exchange of one or more existing securities for one or more new securities. Gross reductions also include net increases in net unrealized depreciation or net decreases in unrealized appreciation as well as the movement of an existing portfolio company out of this category and into a different category. (5) Portfolio company located in the Midwest region as determined by location of the corporate headquarters. The fair value as of March 31, 2022 for control investments located in this region was $338,390. This represented 22.8% of net assets as of March 31, 2022. The fair value as of March 31, 2022 for affiliate investments located in this region was $69,637. This represented 12.4% of net assets as of March 31, 2022. (6) Portfolio company located in the Northeast region as determined by location of the corporate headquarters. The fair value as of March 31, 2022 for control investments located in this region was $134,636. This represented 9.1% of net assets as of March 31, 2022. The fair value as of March 31, 2022 for affiliate investments located in this region was $100,269. This represented 17.9% of net assets as of March 31, 2022. (7) Portfolio company located in the Southeast region as determined by location of the corporate headquarters. The fair value as of March 31, 2022 for control investments located in this region was $18,443. This represented 1.2% of net assets as of March 31, 2022. The fair value as of March 31, 2022 for affiliate investments located in this region was $165,903. This represented 29.7% of net assets as of March 31, 2022. (8) Portfolio company located in the Southwest region as determined by location of the corporate headquarters. The fair value as of March 31, 2022 for control investments located in this region was $587,631. This represented 39.5% of net assets as of March 31, 2022. The fair value as of March 31, 2022 for affiliate investments located in this region was $107,324. This represented 19.2% of net assets as of March 31, 2022. (9) Portfolio company located in the West region as determined by location of the corporate headquarters. The fair value as of March 31, 2022 for control investments located in this region was $407,563. This represented 27.4% of net assets as of March 31, 2022. The fair value as of March 31, 2022 for affiliate investments located in this region was $116,306. This represented 20.8% of net assets as of March 31, 2022. (10) All of the Company’s portfolio investments are generally subject to restrictions on resale as “restricted securities,” unless otherwise noted. (11) This schedule should be read in conjunction with the Consolidated Schedule of Investments and Notes to the Consolidated Financial Statements included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q. Supplemental information can be located within the Consolidated Schedule of Investments including end of period interest rate, preferred dividend rate, maturity date, investments not paid currently in cash and investments whose value was determined using significant unobservable inputs. (12) Investment has an unfunded commitment as of March 31, 2022 (see Note K ). The fair value of the investment includes the impact of the fair value of any unfunded commitments.

SUMMARY OF SIGNIFICANT ACCOUN_4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2023 USD ($) investment company	Mar. 31, 2022 company	Dec. 31, 2022 investment
Schedule of Investments [Line Items]
Cash exceeded Federal Deposit Insurance Corporation insurance protection levels | $	$ 35.2
Percentage of total investment income, attributable to noncash paid-in-kind interest income	2.40%	1.20%
Percentage of total investment come, attributable to noncash cumulative dividend income	0.30%	1.10%
Percentage of total investment income, attributable to interest income, debt investments, net	1.80%	2%
Investment Owned, At Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
Concentration risk, percentage	100%		100%
Investment Owned, At Cost | Investment Type Concentration Risk
Schedule of Investments [Line Items]
Concentration risk, percentage	100%		100%
Non-accrual Status
Schedule of Investments [Line Items]
Number of investments | investment	13		12
Non-accrual Status | Investment Owned, At Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
Concentration risk, percentage	0.60%		0.60%
Non-accrual Status | Investment Owned, At Cost | Investment Type Concentration Risk
Schedule of Investments [Line Items]
Concentration risk, percentage	3.20%		3.70%
Revolving Credit Facility | Line of Credit
Schedule of Investments [Line Items]
Commitment fee (in percentage)	3.40%
LMM portfolio investments
Schedule of Investments [Line Items]
Consultation period subsequent to initial investment	12 months
Investment company, number of portfolio companies with annual third-party appraisal was obtained, reviewed and certified	19	19
Percentage of portfolio with annual third-party appraisal was obtained, reviewed and certified	32%	36%
LMM portfolio investments | Investment Owned, At Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
Concentration risk, percentage	30%	30%
Private Loan portfolio investments
Schedule of Investments [Line Items]
Consultation period subsequent to initial investment	12 months
Investment company, number of portfolio companies with annual third-party appraisal was obtained, reviewed and certified	19	18
Percentage of portfolio with annual third-party appraisal was obtained, reviewed and certified	28%	42%
Private Loan portfolio investments | Investment Owned, At Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
Concentration risk, percentage	25%	26%
Middle Market portfolio investments
Schedule of Investments [Line Items]
Percentage of portfolio investments containing limited consultation with financial advisory services firm	90%		89%
Other Portfolio investments | Investment Owned, At Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
Concentration risk, percentage	2.80%		2.80%
Other Portfolio investments | Investment Owned, At Cost | Investment Type Concentration Risk
Schedule of Investments [Line Items]
Concentration risk, percentage	3.20%		3.20%

SUMMARY OF SIGNIFICANT ACCOUN_5

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Investment Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Accounting Policies [Abstract]
Interest income	$ 93,392	$ 59,441
Dividend income	24,222	16,622
Fee income	2,640	3,332
Total interest, fee and dividend income	$ 120,254	$ 79,395

FAIR VALUE HIERARCHY FOR INVE_3

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Narrative (Details) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2023 USD ($) company	Mar. 31, 2022 USD ($) investment		Dec. 31, 2022 USD ($) investment company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Expenses allocated	$ 4,998	$ 2,817
Annualized total return on investments	0.134	0.118
Achieved total return on investments				0.111
Fair value	$ 4,160,917	$ 4,160,917	[1]	$ 4,102,177	[2]
Cost	$ 3,797,714	3,797,714	[3]	$ 3,773,752	[4]
Investment Owned, At Fair Value | Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage	100%			100%
Investment Owned, At Cost | Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage	100%			100%
Affiliated Entity | External Investment Manager
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Expenses allocated	$ 5,000	$ 2,800
Short-term portfolio investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of investments | investment		1		1
Short-term portfolio investments | Maximum | Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment term	1 year
LMM portfolio investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of portfolio companies | company	79			78
Fair value	$ 2,112,600			$ 2,060,500
Cost	$ 1,727,900			$ 1,719,900
LMM portfolio investments | Investment Owned, At Fair Value | Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage	30%	30%
LMM portfolio investments | Debt | Investment Owned, At Cost | Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage	72.90%			73.70%
LMM portfolio investments | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Annual revenues	$ 10,000
Investments	$ 5,000
LMM portfolio investments | Minimum | Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment term	5 years
LMM portfolio investments | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Annual revenues	$ 150,000
Investments	$ 75,000
LMM portfolio investments | Maximum | Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment term	7 years
Private Loan portfolio investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of portfolio companies | company	86			85
Fair value	$ 1,491,400			$ 1,471,500
Cost	$ 1,527,600			$ 1,500,300
Private Loan portfolio investments | Investment Owned, At Fair Value | Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage	25%	26%
Private Loan portfolio investments | Debt | Investment Owned, At Cost | Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage	97.10%			97.10%
Private Loan portfolio investments | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	$ 10,000
Private Loan portfolio investments | Minimum | Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment term	3 years
Private Loan portfolio investments | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	$ 75,000
Private Loan portfolio investments | Maximum | Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment term	7 years
Middle Market portfolio investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of portfolio companies | company	30			31
Fair value	$ 306,200			$ 329,100
Cost	$ 391,000			$ 401,700
Middle Market portfolio investments | Debt | Investment Owned, At Cost | Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage	93.60%			93.80%
Middle Market portfolio investments | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Annual revenues	$ 150,000
Investments	$ 3,000
Middle Market portfolio investments | Minimum | Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment term	3 years
Middle Market portfolio investments | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Annual revenues	$ 1,500,000
Investments	$ 25,000
Middle Market portfolio investments | Maximum | Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment term	7 years
Other Portfolio investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of portfolio companies | company	14			14
Fair value	$ 116,100			$ 116,300
Cost	$ 119,700			$ 120,400
Other Portfolio investments | Investment Owned, At Fair Value | Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage	2.80%			2.80%
Other Portfolio investments | Investment Owned, At Cost | Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage	3.20%			3.20%
Other Portfolio investments | Minimum | Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment term	5 years
Other Portfolio investments | Maximum | Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment term	10 years
External Investment Manager investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	$ 132,700			$ 122,900
Cost	$ 29,500			$ 29,500
External Investment Manager investments | Investment Owned, At Fair Value | Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage	3.20%			3%
External Investment Manager investments | Investment Owned, At Cost | Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage	0.80%			0.80%
[1] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.

FAIR VALUE HIERARCHY FOR INVE_4

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Level 3 Portfolio Investments (Details) $ in Thousands	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)		Mar. 31, 2022 USD ($)	[2]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Level 3 investments	$ 4,160,917	$ 4,102,177	[1]	$ 4,160,917
Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Level 3 investments	$ 4,158,975	$ 4,100,273
Significant Unobservable Inputs (Level 3) | EBITDA multiple, outlier | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	2	2
Significant Unobservable Inputs (Level 3) | EBITDA multiple, outlier | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	15.7	15.7
Significant Unobservable Inputs (Level 3) | Risk adjusted discount factor, outlier | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	0.034	0.038
Significant Unobservable Inputs (Level 3) | Risk adjusted discount factor, outlier | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	0.350	0.433
Significant Unobservable Inputs (Level 3) | Equity investments | Discounted cash flow
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Level 3 investments	$ 1,217,243	$ 1,172,077
Significant Unobservable Inputs (Level 3) | Equity investments | Discounted cash flow | WACC | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	0.093	0.094
Significant Unobservable Inputs (Level 3) | Equity investments | Discounted cash flow | WACC | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	0.223	0.225
Significant Unobservable Inputs (Level 3) | Equity investments | Discounted cash flow | WACC | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	0.144	0.145
Significant Unobservable Inputs (Level 3) | Equity investments | Discounted cash flow | WACC | Median
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	0.152	0.154
Significant Unobservable Inputs (Level 3) | Equity investments | Market comparable / Enterprise value | EBITDA multiple | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	4.5	4.3
Significant Unobservable Inputs (Level 3) | Equity investments | Market comparable / Enterprise value | EBITDA multiple | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	8.5	8.3
Significant Unobservable Inputs (Level 3) | Equity investments | Market comparable / Enterprise value | EBITDA multiple | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	6.8	6.7
Significant Unobservable Inputs (Level 3) | Equity investments | Market comparable / Enterprise value | EBITDA multiple | Median
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	6.2	6
Significant Unobservable Inputs (Level 3) | Debt investments | Discounted cash flow
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Level 3 investments	$ 2,696,096	$ 2,663,958
Significant Unobservable Inputs (Level 3) | Debt investments | Discounted cash flow | Risk adjusted discount factor | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	0.060	0.057
Significant Unobservable Inputs (Level 3) | Debt investments | Discounted cash flow | Risk adjusted discount factor | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	0.164	0.157
Significant Unobservable Inputs (Level 3) | Debt investments | Discounted cash flow | Risk adjusted discount factor | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	0.102	0.100
Significant Unobservable Inputs (Level 3) | Debt investments | Discounted cash flow | Risk adjusted discount factor | Median
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	0.105	0.103
Significant Unobservable Inputs (Level 3) | Debt investments | Discounted cash flow | Expected principal recovery percentage | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	0	0
Significant Unobservable Inputs (Level 3) | Debt investments | Discounted cash flow | Expected principal recovery percentage | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	1	1
Significant Unobservable Inputs (Level 3) | Debt investments | Discounted cash flow | Expected principal recovery percentage | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	0.995	0.994
Significant Unobservable Inputs (Level 3) | Debt investments | Discounted cash flow | Expected principal recovery percentage | Median
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	1	1
Significant Unobservable Inputs (Level 3) | Debt investments | Market approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Level 3 investments	$ 245,636	$ 264,238
Significant Unobservable Inputs (Level 3) | Debt investments | Market approach | Third-party quote | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	3	5.6
Significant Unobservable Inputs (Level 3) | Debt investments | Market approach | Third-party quote | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	97.5	98.5
Significant Unobservable Inputs (Level 3) | Debt investments | Market approach | Third-party quote | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	87.3	87
Significant Unobservable Inputs (Level 3) | Debt investments | Market approach | Third-party quote | Median
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range	93.9	91.4
[1] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.

FAIR VALUE HIERARCHY FOR INVE_5

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Changes in Fair Value of Level 3 Portfolio Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 4,100,273	$ 3,559,837
Transfers Into Level 3 Hierarchy	0	0
Redemptions/ Repayments	(91,171)	(201,268)
New Investments	115,134	311,755
Other	0	0
Ending balance	4,158,975	3,688,770
Investments | Net Changes from Unrealized to Realized
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain (loss) included in earnings	29,118	2,541
Investments | Debt and Equity Securities, Unrealized Gain (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain (loss) included in earnings	5,621	15,905
Debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	2,928,196	2,509,568
Transfers Into Level 3 Hierarchy	0	0
Redemptions/ Repayments	(88,300)	(183,699)
New Investments	106,658	287,044
Other	(11,446)	0
Ending balance	2,941,732	2,608,229
Debt | Net Changes from Unrealized to Realized
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain (loss) included in earnings	33,064	2,123
Debt | Debt and Equity Securities, Unrealized Gain (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain (loss) included in earnings	(26,440)	(6,807)
Equity
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	1,166,643	1,043,709
Transfers Into Level 3 Hierarchy	0	0
Redemptions/ Repayments	(2,871)	(17,569)
New Investments	8,476	24,711
Other	14,022	0
Ending balance	1,212,214	1,073,781
Equity | Net Changes from Unrealized to Realized
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain (loss) included in earnings	(3,946)	418
Equity | Debt and Equity Securities, Unrealized Gain (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain (loss) included in earnings	29,890	22,512
Equity Warrant
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	5,434	6,560
Transfers Into Level 3 Hierarchy	0	0
Redemptions/ Repayments	0	0
New Investments	0	0
Other	(2,576)	0
Ending balance	5,029	6,760
Equity Warrant | Net Changes from Unrealized to Realized
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain (loss) included in earnings	0	0
Equity Warrant | Debt and Equity Securities, Unrealized Gain (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain (loss) included in earnings	$ 2,171	$ 200

FAIR VALUE HIERARCHY FOR INVE_6

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022		Mar. 31, 2022	[2]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	$ 4,160,917	$ 4,102,177	[1]	$ 4,160,917
Fair Value, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	4,160,917	4,102,177
Fair Value, Recurring | LMM portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	2,112,619	2,060,459
Fair Value, Recurring | Private Loan portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	1,491,395	1,471,466
Fair Value, Recurring | Middle Market portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	306,244	329,119
Fair Value, Recurring | Other Portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	116,067	116,299
Fair Value, Recurring | External Investment Manager investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	132,650	122,930
Fair Value, Recurring | Short-term portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	1,942	1,904
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | LMM portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | Private Loan portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | Middle Market portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | Other Portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | External Investment Manager investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | Short-term portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	1,942	1,904
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | LMM portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | Private Loan portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | Middle Market portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | Other Portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | External Investment Manager investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | Short-term portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	1,942	1,904
Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	4,158,975	4,100,273
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	4,158,975	4,100,273
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | LMM portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	2,112,619	2,060,459
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | Private Loan portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	1,491,395	1,471,466
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | Middle Market portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	306,244	329,119
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | Other Portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	116,067	116,299
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | External Investment Manager investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	132,650	122,930
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | Short-term portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	$ 0	$ 0
[1] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.

FAIR VALUE HIERARCHY FOR INVE_7

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Summary of Investments (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($) company	Dec. 31, 2022 USD ($) company		Mar. 31, 2022 USD ($)
Summary of Investment Holdings [Line Items]
Fair value	$ 4,160,917	$ 4,102,177	[1]	$ 4,160,917	[2]
Cost	$ 3,797,714	$ 3,773,752	[3]	$ 3,797,714	[4]
Investment Owned, At Cost | Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	100%	100%
Non-accrual Status | Investment Owned, At Cost | Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	3.20%	3.70%
Equity | Investment Owned, At Cost | Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	14.60%	14.20%
First lien debt | Investment Owned, At Cost | Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	84.70%	85%
LMM portfolio investments
Summary of Investment Holdings [Line Items]
Number of portfolio companies | company	79	78
Fair value	$ 2,112,600	$ 2,060,500
Cost	$ 1,727,900	$ 1,719,900
Weighted-average annual effective yield	12.60%	12.30%
Average EBITDA	$ 8,300	$ 8,000
Diluted equity ownership percentage	41%	41%
Investment company, number of companies within portfolio excluded from EBITDA calculation | company	4	3
LMM portfolio investments | Non-accrual Status
Summary of Investment Holdings [Line Items]
Weighted-average annual effective yield	12.20%	11.60%
LMM portfolio investments | Debt | Investment Owned, At Cost | Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	72.90%	73.70%
LMM portfolio investments | Equity | Investment Owned, At Cost | Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	27.10%	26.30%
LMM portfolio investments | First lien debt | Investment Owned, At Cost | Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	99.20%	99.10%
Private Loan portfolio investments
Summary of Investment Holdings [Line Items]
Number of portfolio companies | company	86	85
Fair value	$ 1,491,400	$ 1,471,500
Cost	$ 1,527,600	$ 1,500,300
Weighted-average annual effective yield	12.40%	11.60%
Average EBITDA	$ 38,100	$ 38,100
Investment company, number of companies within portfolio excluded from EBITDA calculation | company	2	2
Private Loan portfolio investments | Non-accrual Status
Summary of Investment Holdings [Line Items]
Weighted-average annual effective yield	12%	11.20%
Private Loan portfolio investments | Debt | Investment Owned, At Cost | Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	97.10%	97.10%
Private Loan portfolio investments | Equity | Investment Owned, At Cost | Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	2.90%	2.90%
Private Loan portfolio investments | First lien debt | Investment Owned, At Cost | Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	99.50%	99.60%
Middle Market portfolio investments
Summary of Investment Holdings [Line Items]
Number of portfolio companies | company	30	31
Fair value	$ 306,200	$ 329,100
Cost	$ 391,000	$ 401,700
Weighted-average annual effective yield	11.80%	11%
Average EBITDA	$ 65,400	$ 68,700
Middle Market portfolio investments | Non-accrual Status
Summary of Investment Holdings [Line Items]
Weighted-average annual effective yield	10.40%	10.30%
Middle Market portfolio investments | Debt | Investment Owned, At Cost | Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	93.60%	93.80%
Middle Market portfolio investments | Equity | Investment Owned, At Cost | Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	6.40%	6.20%
Middle Market portfolio investments | First lien debt | Investment Owned, At Cost | Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	99.30%	98.80%
[1] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.

FAIR VALUE HIERARCHY FOR INVE_8

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Percentage of Portfolio Investments by Type of Investment (Details) - Investment Type Concentration Risk	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Investment Owned, At Cost
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	100%	100%
Investment Owned, At Cost | First lien debt
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	84.70%	85%
Investment Owned, At Cost | Equity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	14.60%	14.20%
Investment Owned, At Cost | Second lien debt
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	0.30%	0.30%
Investment Owned, At Cost | Equity warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	0.20%	0.20%
Investment Owned, At Cost | Other
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	0.20%	0.30%
Investment Owned, At Fair Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	100%	100%
Investment Owned, At Fair Value | First lien debt
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	74.60%	75.20%
Investment Owned, At Fair Value | Equity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	24.70%	24.10%
Investment Owned, At Fair Value | Second lien debt
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	0.40%	0.30%
Investment Owned, At Fair Value | Equity warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	0.10%	0.10%
Investment Owned, At Fair Value | Other
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	0.20%	0.30%

FAIR VALUE HIERARCHY FOR INVE_9

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Percentage of Portfolio Investments by Geographical Regions (Details) - Geographic Concentration Risk	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Investment Owned, At Cost
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	100%	100%
Investment Owned, At Cost | West
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	28.80%	28.50%
Investment Owned, At Cost | Northeast
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	19.50%	19%
Investment Owned, At Cost | Southwest
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	19.10%	20.10%
Investment Owned, At Cost | Midwest
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	16.70%	16.30%
Investment Owned, At Cost | Southeast
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	13.90%	14%
Investment Owned, At Cost | Other Non-United States
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.60%	1.50%
Investment Owned, At Cost | Canada
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	0.40%	0.60%
Investment Owned, At Fair Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	100%	100%
Investment Owned, At Fair Value | West
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	28.40%	28.70%
Investment Owned, At Fair Value | Northeast
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	19.10%	18.80%
Investment Owned, At Fair Value | Southwest
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	21.40%	21.40%
Investment Owned, At Fair Value | Midwest
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	17.10%	16.60%
Investment Owned, At Fair Value | Southeast
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	12.20%	12.40%
Investment Owned, At Fair Value | Other Non-United States
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.50%	1.50%
Investment Owned, At Fair Value | Canada
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	0.30%	0.60%

FAIR VALUE HIERARCHY FOR INV_10

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Percentage of Portfolio Investments by Industry Sector (Details) - Industry Concentration Risk	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Investment Owned, At Cost
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	100%	100%
Investment Owned, At Cost | Internet Software & Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	8%	8%
Investment Owned, At Cost | Machinery
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	7.30%	7.40%
Investment Owned, At Cost | Commercial Services & Supplies
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	6.70%	6.70%
Investment Owned, At Cost | Construction & Engineering
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	5.80%	5.80%
Investment Owned, At Cost | Distributors
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	5.20%	5.10%
Investment Owned, At Cost | Health Care Providers & Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	4.80%	4.70%
Investment Owned, At Cost | Diversified Consumer Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	4.60%	4.50%
Investment Owned, At Cost | Professional Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	4.60%	4.20%
Investment Owned, At Cost | Leisure Equipment & Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	4.50%	4.50%
Investment Owned, At Cost | IT Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	3.60%	3.30%
Investment Owned, At Cost | Specialty Retail
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	3.20%	3.20%
Investment Owned, At Cost | Energy Equipment & Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	3.10%	3.70%
Investment Owned, At Cost | Tobacco
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	3.10%	3.10%
Investment Owned, At Cost | Containers & Packaging
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	2.50%	2.60%
Investment Owned, At Cost | Media
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	2.40%	2.40%
Investment Owned, At Cost | Aerospace & Defense
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	2.40%	2.30%
Investment Owned, At Cost | Computers & Peripherals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	2.20%	2.20%
Investment Owned, At Cost | Building Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.90%	1.90%
Investment Owned, At Cost | Software
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.90%	1.90%
Investment Owned, At Cost | Textiles, Apparel & Luxury Goods
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.80%	1.90%
Investment Owned, At Cost | Communications Equipment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.80%	1.80%
Investment Owned, At Cost | Diversified Telecommunication Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.70%	1.90%
Investment Owned, At Cost | Auto Components
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.70%	1.70%
Investment Owned, At Cost | Food Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.60%	1.60%
Investment Owned, At Cost | Electronic Equipment, Instruments & Components
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.60%	1.60%
Investment Owned, At Cost | Diversified Financial Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.40%	1.50%
Investment Owned, At Cost | Internet & Catalog Retail
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.30%	1.30%
Investment Owned, At Cost | Health Care Equipment & Supplies
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.30%	1.30%
Investment Owned, At Cost | Food & Staples Retailing
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.10%	1.20%
Investment Owned, At Cost | Chemicals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.10%	1.10%
Investment Owned, At Cost | Hotels, Restaurants & Leisure
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.10%	1.10%
Investment Owned, At Cost | Electrical Equipment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1%	1%
Investment Owned, At Cost | Household Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1%	0.40%
Investment Owned, At Cost | Other
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	2.70%	3.10%
Investment Owned, At Fair Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	100%	100%
Investment Owned, At Fair Value | Internet Software & Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	6.90%	6.80%
Investment Owned, At Fair Value | Machinery
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	8.40%	8.40%
Investment Owned, At Fair Value | Commercial Services & Supplies
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	6%	6.10%
Investment Owned, At Fair Value | Construction & Engineering
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	5.60%	5.70%
Investment Owned, At Fair Value | Distributors
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	5.60%	5.50%
Investment Owned, At Fair Value | Health Care Providers & Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	4.50%	4.30%
Investment Owned, At Fair Value | Diversified Consumer Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	6.80%	6.80%
Investment Owned, At Fair Value | Professional Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	4.10%	3.80%
Investment Owned, At Fair Value | Leisure Equipment & Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	3.90%	4%
Investment Owned, At Fair Value | IT Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	3.30%	3.10%
Investment Owned, At Fair Value | Specialty Retail
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	3.30%	3.50%
Investment Owned, At Fair Value | Energy Equipment & Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	2.70%	2.70%
Investment Owned, At Fair Value | Tobacco
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	3.30%	3.40%
Investment Owned, At Fair Value | Containers & Packaging
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	2.60%	2.80%
Investment Owned, At Fair Value | Media
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	2.90%	3%
Investment Owned, At Fair Value | Aerospace & Defense
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	2.20%	2.20%
Investment Owned, At Fair Value | Computers & Peripherals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	3.10%	3%
Investment Owned, At Fair Value | Building Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.80%	1.90%
Investment Owned, At Fair Value | Software
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	2.10%	2.10%
Investment Owned, At Fair Value | Textiles, Apparel & Luxury Goods
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.60%	1.80%
Investment Owned, At Fair Value | Diversified Telecommunication Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.50%	1.80%
Investment Owned, At Fair Value | Auto Components
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.60%	1.60%
Investment Owned, At Fair Value | Food Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.80%	1.80%
Investment Owned, At Fair Value | Diversified Financial Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.60%	1.70%
Investment Owned, At Fair Value | Internet & Catalog Retail
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.30%	1.30%
Investment Owned, At Fair Value | Construction Materials
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.10%	1%
Investment Owned, At Fair Value | Health Care Equipment & Supplies
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1%	1%
Investment Owned, At Fair Value | Food & Staples Retailing
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1%	1.10%
Investment Owned, At Fair Value | Chemicals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.10%	1.10%
Investment Owned, At Fair Value | Electrical Equipment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1%	1%
Investment Owned, At Fair Value | Other
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	6.30%	5.70%

EXTERNAL INVESTMENT MANAGER - N

EXTERNAL INVESTMENT MANAGER - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Related Party Transaction [Line Items]
Net investment income	$ 80,967	$ 52,212
External Investment Manager
Related Party Transaction [Line Items]
Net investment income	$ 8,100	$ 5,100
Affiliated Entity | External Investment Manager | Advisory Agreement
Related Party Transaction [Line Items]
Management and service fees (in percentage)	1.75%
Management and service fees, incentive rate	20%

EXTERNAL INVESTMENT MANAGER - B

EXTERNAL INVESTMENT MANAGER - Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Investment Company, Nonconsolidated Subsidiary [Line Items]
Total assets	$ 4,293,255	$ 4,241,885
Dividend payable to MSCC and its subsidiaries	18,036	17,676
Stockholders' Equity Attributable to Parent	2,172,922	2,108,586	$ 1,873,654	$ 1,788,846
Total liabilities and net assets	4,293,255	4,241,885
External Investment Manager
Investment Company, Nonconsolidated Subsidiary [Line Items]
Accounts receivable - advisory clients	9,405	8,130
Intangible Asset	29,500	29,500
Total assets	38,905	37,630
Accounts payable to MSCC and its subsidiaries	6,349	4,455
Dividend payable to MSCC and its subsidiaries	3,056	3,675
Stockholders' Equity Attributable to Parent	29,500	29,500
Total liabilities and net assets	$ 38,905	$ 37,630

EXTERNAL INVESTMENT MANAGER - S

EXTERNAL INVESTMENT MANAGER - Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Investment Company, Nonconsolidated Subsidiary [Line Items]
Tax expense	$ (8,114)	$ (5,097)
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS	79,592	65,203
External Investment Manager
Investment Company, Nonconsolidated Subsidiary [Line Items]
Total revenues	8,925	5,732
Salaries, share-based compensation and other personnel costs	(4,268)	(2,260)
Other G&A expenses	(730)	(557)
Total allocated expenses	(4,998)	(2,817)
Pre-tax income	3,927	2,915
Tax expense	(871)	(642)
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS	3,056	2,273
External Investment Manager | Management fee income
Investment Company, Nonconsolidated Subsidiary [Line Items]
Total revenues	5,470	5,444
External Investment Manager | Incentive fees
Investment Company, Nonconsolidated Subsidiary [Line Items]
Total revenues	3,304	137
External Investment Manager | Administrative services fees
Investment Company, Nonconsolidated Subsidiary [Line Items]
Total revenues	$ 151	$ 151

DEBT - Summary of Debt (Details

DEBT - Summary of Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Outstanding Balance	$ 1,998,000	$ 2,007,000
Unamortized Debt Issuance (Costs)/ Premiums	(8,359)	(7,898)
Recorded Value	1,989,641	1,999,102
Estimated Fair Value	1,857,852	1,882,810
July 2026 Notes | Unsecured Notes
Debt Instrument [Line Items]
Outstanding Balance	500,000	500,000
Unamortized Debt Issuance (Costs)/ Premiums	(1,733)	(1,864)
Recorded Value	498,267	498,136
Estimated Fair Value	438,945	434,250
May 2024 Notes | Unsecured Notes
Debt Instrument [Line Items]
Outstanding Balance	450,000	450,000
Unamortized Debt Issuance (Costs)/ Premiums	590	727
Recorded Value	450,590	450,727
Estimated Fair Value	439,754	444,749
SBIC Debentures | Unsecured Notes
Debt Instrument [Line Items]
Outstanding Balance	334,000	350,000
Unamortized Debt Issuance (Costs)/ Premiums	(5,794)	(6,086)
Recorded Value	328,206	343,914
Estimated Fair Value	261,555	290,204
December 2025 Notes | Unsecured Notes
Debt Instrument [Line Items]
Outstanding Balance	150,000	100,000
Unamortized Debt Issuance (Costs)/ Premiums	(1,422)	(675)
Recorded Value	148,578	99,325
Estimated Fair Value	153,598	106,607
Credit Facility | Line of Credit
Debt Instrument [Line Items]
Recorded Value	564,000	607,000
Credit Facility | Corporate Facility | Line of Credit
Debt Instrument [Line Items]
Outstanding Balance	394,000	407,000
Unamortized Debt Issuance (Costs)/ Premiums	0	0
Recorded Value	394,000	407,000
Estimated Fair Value	394,000	407,000
Credit Facility | SPV Facility | Line of Credit
Debt Instrument [Line Items]
Outstanding Balance	170,000	200,000
Unamortized Debt Issuance (Costs)/ Premiums	0	0
Recorded Value	170,000	200,000
Estimated Fair Value	$ 170,000	$ 200,000

DEBT - Summary of Interest Expe

DEBT - Summary of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Debt Instrument [Line Items]
Total Interest Expense	$ 24,997	$ 16,687
July 2026 Notes | Unsecured Notes
Debt Instrument [Line Items]
Total Interest Expense	3,882	3,882
May 2024 Notes | Unsecured Notes
Debt Instrument [Line Items]
Total Interest Expense	5,714	5,714
SBIC Debentures | Unsecured Notes
Debt Instrument [Line Items]
Total Interest Expense	2,752	2,799
December 2025 Notes | Unsecured Notes
Debt Instrument [Line Items]
Total Interest Expense	2,612	0
December 2022 Notes | Unsecured Notes
Debt Instrument [Line Items]
Total Interest Expense	0	2,233
Credit Facility | Corporate Facility | Line of Credit
Debt Instrument [Line Items]
Total Interest Expense	6,610	2,059
Credit Facility | SPV Facility | Line of Credit
Debt Instrument [Line Items]
Total Interest Expense	$ 3,427	$ 0

DEBT - SBIC Debentures (Details

DEBT - SBIC Debentures (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Payable	$ 1,998,000,000	$ 2,007,000,000
Recorded value	1,989,641,000	$ 1,999,102,000
Unsecured Notes
Debt Instrument [Line Items]
Debt instrument, weighted-average annual interest rate		2.90%
Unsecured Notes | SBIC Debentures
Debt Instrument [Line Items]
Payable	$ 334,000,000	$ 350,000,000
Debt instrument, term	10 years
Debt instrument, weighted-average annual interest rate	2.90%
Debt instrument, remaining term	5 years 1 month 6 days
Face amount	$ 334,000,000	350,000,000
Recorded value	328,206,000	$ 343,914,000
Unsecured Notes | SBIC Debentures | Maximum
Debt Instrument [Line Items]
Payable	350,000,000
Unsecured Notes | SBIC Debentures | MSMF
Debt Instrument [Line Items]
Face amount	159,000,000
Recorded value	156,200,000
Unamortized debt issuance costs	2,800,000
Unsecured Notes | SBIC Debentures | MSC III
Debt Instrument [Line Items]
Face amount	175,000,000
Recorded value	172,000,000
Unamortized debt issuance costs	$ 3,000,000

DEBT - Corporate Facility (Deta

DEBT - Corporate Facility (Details) - Line of Credit - Revolving Credit Facility - Corporate Facility	3 Months Ended
	Mar. 31, 2023 USD ($) lender	Mar. 31, 2022
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 980,000,000
Line of credit facility, number of lenders | lender	18
Line of credit facility, maximum borrowing capacity including accordion feature	$ 1,400,000,000
Debt instrument, credit spread adjustment	0.10%
Line of credit facility, unused capacity, commitment fee percentage	0.25%
Interest rate	6.60%
Average interest rate	6.50%	2%
Minimum | SOFR
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	1.875%
Minimum | Prime Rate
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	0.875%
Maximum | SOFR
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	2%
Maximum | Prime Rate
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	1%

DEBT - SPV Facility (Details)

DEBT - SPV Facility (Details)	1 Months Ended	3 Months Ended
	Nov. 30, 2022 USD ($) lender	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) lender
Line of Credit | Revolving Credit Facility
Line of Credit Facility [Line Items]
Commitment fee (in percentage)		3.40%
MSCC Funding I, LLC
Line of Credit Facility [Line Items]
Average interest rate		7.10%
MSCC Funding I, LLC | Line of Credit | Revolving Credit Facility | SPV Facility
Line of Credit Facility [Line Items]
Debt instrument, number of lenders | lender	3		4
Line of credit facility	$ 240,000,000	$ 255,000,000	$ 255,000,000
Line of credit facility, maximum borrowing capacity including accordion feature		$ 450,000,000
Commitment fee (in percentage)	35%
Interest rate		7.30%
MSCC Funding I, LLC | Line of Credit | Revolving Credit Facility | SPV Facility | Minimum
Line of Credit Facility [Line Items]
Line of credit facility, unused capacity, commitment fee percentage	0.50%
MSCC Funding I, LLC | Line of Credit | Revolving Credit Facility | SPV Facility | Maximum
Line of Credit Facility [Line Items]
Line of credit facility, unused capacity, commitment fee percentage	0.75%
MSCC Funding I, LLC | Line of Credit | Revolving Credit Facility | SPV Facility | SOFR
Line of Credit Facility [Line Items]
Debt instrument, credit spread adjustment	0.10%
MSCC Funding I, LLC | Line of Credit | Revolving Credit Facility | SPV Facility | SOFR | Reinvestment period
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	2.50%
MSCC Funding I, LLC | Line of Credit | Revolving Credit Facility | SPV Facility | SOFR | First year amortization period
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	2.625%
MSCC Funding I, LLC | Line of Credit | Revolving Credit Facility | SPV Facility | SOFR | Second year amortization period
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	2.75%

DEBT - SPV Facility Balance She

DEBT - SPV Facility Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022		Mar. 31, 2022		Dec. 31, 2021
ASSETS
Investments at fair value:	$ 4,160,917	$ 4,102,177	[1]	$ 4,160,917	[2]
Investment, cost	3,797,714	3,773,752	[3]	3,797,714	[4]
Cash and cash equivalents	39,752	49,121
Interest and dividend receivable and other assets	84,597	82,731
Receivable for securities sold	505	381
Deferred financing costs (net of accumulated amortization of $282 and $141 as of March 31, 2023 and December 31, 2022, respectively)	7,484	7,475
Deferred financing costs, accumulated amortization	11,003	10,603
Total assets	4,293,255	4,241,885
LIABILITIES
Debt	1,989,641	1,999,102
Accounts payable and other liabilities	39,759	52,092
Interest payable	18,671	16,580
Total liabilities	2,120,333	2,133,299
NET ASSETS
Contributed capital	2,083,175	2,030,531
Total undistributed earnings	88,950	77,271
Total net assets	2,172,922	2,108,586		1,873,654		$ 1,788,846
Total liabilities and equity	4,293,255	4,241,885
MSCC Funding I, LLC
ASSETS
Cash and cash equivalents	10,865	10,838
Interest and dividend receivable and other assets	3,281	2,828
Accounts receivable to MSCC and its subsidiaries	0	556
Receivable for securities sold	62	369
Deferred financing costs (net of accumulated amortization of $282 and $141 as of March 31, 2023 and December 31, 2022, respectively)	2,679	2,630
Deferred financing costs, accumulated amortization	282	141
Total assets	317,989	333,728
LIABILITIES
Debt	170,000	200,000
Accounts payable and other liabilities	192	112
Interest payable	1,104	1,272
Total liabilities	171,296	201,384
NET ASSETS
Contributed capital	136,883	126,010
Total undistributed earnings	9,810	6,334
Total net assets	146,693	132,344
Total liabilities and equity	317,989	333,728
Non‑Control/Non‑Affiliate investments
ASSETS
Investments at fair value:	1,788,687	1,780,646	[1],[5]	1,788,687	[2],[6]
Investment, cost	1,890,979	1,867,414	[3],[5]	$ 1,890,979	[4],[6]
Non‑Control/Non‑Affiliate investments | MSCC Funding I, LLC
ASSETS
Investments at fair value:	301,102	316,507
Investment, cost	$ 300,018	$ 314,752
[1] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.

DEBT - SPV Facility Statement o

DEBT - SPV Facility Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
INVESTMENT INCOME:
Non‑Control/Non‑Affiliate investments	$ 120,254	$ 79,395
EXPENSES:
Interest	(24,997)	(16,687)
General and administrative	(4,077)	(3,226)
Total allocated expenses	(39,287)	(27,183)
NET INVESTMENT INCOME	80,967	52,212
NET UNREALIZED APPRECIATION (DEPRECIATION):
Total net unrealized appreciation (depreciation)	35,118	14,752
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS	79,592	65,203
MSCC Funding I, LLC
EXPENSES:
Interest	(3,428)
Management fee income	(365)
General and administrative	(57)
Total allocated expenses	(3,850)
NET INVESTMENT INCOME	4,867
NET UNREALIZED APPRECIATION (DEPRECIATION):
Total net unrealized appreciation (depreciation)	(1,391)
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS	3,476
MSCC Funding I, LLC | SBIC Debentures
NET UNREALIZED APPRECIATION (DEPRECIATION):
Total net unrealized appreciation (depreciation)	0
Non‑Control/Non‑Affiliate investments
INVESTMENT INCOME:
Non‑Control/Non‑Affiliate investments	53,936	32,901
NET UNREALIZED APPRECIATION (DEPRECIATION):
Total net unrealized appreciation (depreciation)	(15,184)	$ 3,432
Non‑Control/Non‑Affiliate investments | MSCC Funding I, LLC
INVESTMENT INCOME:
Non‑Control/Non‑Affiliate investments	8,717
NET UNREALIZED APPRECIATION (DEPRECIATION):
Total net unrealized appreciation (depreciation)	$ (1,391)

DEBT - Notes_Due (Details)

DEBT - Notes Due (Details) - Unsecured Notes	1 Months Ended
	Oct. 31, 2021 USD ($)	Jan. 31, 2021 USD ($)	Jul. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Apr. 30, 2019 USD ($)	Nov. 30, 2017 USD ($)	Mar. 31, 2023 USD ($)	Feb. 28, 2023 USD ($)	Dec. 31, 2022 USD ($) agency
December 2022 Notes
Debt Instrument [Line Items]
Debt instrument, face amount						$ 185,000,000
Debt instrument, interest rate, stated percentage						4.50%
Debt instrument, issuance price, percentage						99.16%
May 2024 Notes
Debt Instrument [Line Items]
Debt instrument, face amount			$ 125,000,000	$ 75,000,000	$ 250,000,000		$ 450,000,000		$ 450,000,000
Debt instrument, interest rate, stated percentage					5.20%
Debt instrument, issuance price, percentage			102.70%	105%	99.125%
July 2026 Notes
Debt Instrument [Line Items]
Debt instrument, face amount	$ 200,000,000	$ 300,000,000					500,000,000		500,000,000
Debt instrument, interest rate, stated percentage		3%
Debt instrument, issuance price, percentage	101.741%	99.004%
December 2025 Notes
Debt Instrument [Line Items]
Debt instrument, face amount							$ 150,000,000		$ 150,000,000
Debt instrument, credit rating, below investment grade event, percentage of agencies									67%
Debt instrument, secured debt ratio event									0.35
December 2025 Notes | Minimum
Debt Instrument [Line Items]
Debt instrument, credit rating, below investment grade rating, number of agencies | agency									1
December 2025 Notes | Maximum
Debt Instrument [Line Items]
Debt instrument, credit rating, below investment grade rating, number of agencies | agency									2
December 2025 Series A Notes
Debt Instrument [Line Items]
Debt instrument, face amount									$ 100,000,000
Debt instrument, interest rate, stated percentage									7.84%
December 2025 Series B Notes
Debt Instrument [Line Items]
Debt instrument, face amount								$ 50,000,000
Debt instrument, interest rate, stated percentage								7.53%

FINANCIAL HIGHLIGHTS (Details)

FINANCIAL HIGHLIGHTS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Investment Company, Financial Highlights [Roll Forward]
NAV at the beginning of the period (in dollars per share)	$ 26.86	$ 25.29
Net investment income (in dollars per share)	1.02	0.73
Net realized gain (loss) (in dollars per share)	(0.36)	0.05
Net unrealized appreciation (depreciation) (in dollars per share)	0.44	0.20
Income tax provision (in dollars per share)	(0.10)	(0.07)
Net increase in net assets resulting from operations (in dollars per share)	1	0.91
Dividends paid from net investment income (in dollars per share)	(0.85)	(0.72)
Dividends paid (in dollars per share)	(0.85)	(0.72)
Impact of the net change in monthly dividends declared prior to the end of the period and paid in the subsequent period (in dollars per share)	(0.01)	(0.01)
Accretive effect of stock offerings (issuing shares above NAV per share) (in dollars per share)	0.15	0.35
Accretive effect of DRIP issuance (issuing shares above NAV per share) (in dollars per share)	0.03	0.03
Other (in dollars per share)	0.05	0.04
NAV at the end of the period (in dollars per share)	27.23	25.89
Market value at the end of the period (in dollars per share)	$ 39.46	$ 42.64
Shares outstanding at the end of the period (in shares)	79,794,089	72,370,407
NAV at end of period	$ 2,172,922	$ 1,873,654	$ 2,108,586	$ 1,788,846
Average NAV	2,140,754	1,831,250
Average outstanding debt	$ 1,992,000	$ 1,784,750
Investment Company, Ratio To Average Net Assets [Abstract]
Ratio of total expenses, including income tax expense, to average NAV	2.21%	1.76%
Ratio of operating expenses to average NAV	1.84%	1.48%
Ratio of operating expenses, excluding interest expense, to average NAV	0.67%	0.57%
Ratio of net investment income to average NAV	3.78%	2.85%
Portfolio turnover ratio	1.54%	6.49%
Total investment return	9.13%	(3.32%)
Total return based on change in NAV	3.77%	3.64%
Affiliated Entity | External Investment Manager
Investment Company, Ratio To Average Net Assets [Abstract]
Total expenses	$ 5,000	$ 2,800

DIVIDENDS, DISTRIBUTIONS AND _3

DIVIDENDS, DISTRIBUTIONS AND TAXABLE INCOME - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Monthly dividend, per share (in dollars per share)	$ 0.225
Dividends	$ 53.6	$ 46
Dividends, per share (in dollars per share)	$ 0.675	$ 0.645
Supplemental dividend	$ 14	$ 5.4
Supplemental dividend (in dollars per share)	$ 0.175	$ 0.075
Net deferred tax liability	$ 54.2		$ 47.8

DIVIDENDS, DISTRIBUTIONS AND _4

DIVIDENDS, DISTRIBUTIONS AND TAXABLE INCOME - Reconciliation to Taxable Income and to Total Distributions Declared to Common Stockholders (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Tax Disclosure [Abstract]
Net increase in net assets resulting from operations	$ 79,592	$ 65,203
Book-tax difference from share-based compensation expense	2,747	2,818
Net unrealized appreciation	(35,118)	(14,752)
Income tax provision	8,114	5,097
Pre-tax book (income) loss not consolidated for tax purposes	15,791	(2,933)
Book income and tax income differences, including debt origination, structuring fees, dividends, realized gains and changes in estimates	5,824	2,862
Estimated taxable income	76,950	58,295
Taxable income earned in prior year and carried forward for distribution in current year	49,216	50,834
Taxable income earned prior to period end and carried forward for distribution next period	(76,289)	(72,844)
Dividend payable as of period end and paid in the following period	18,036	15,519
Total distributions accrued or paid to common stockholders	$ 67,913	$ 51,804

DIVIDENDS, DISTRIBUTIONS AND _5

DIVIDENDS, DISTRIBUTIONS AND TAXABLE INCOME - Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Current tax expense:
Federal	$ 140	$ 52
State	857	543
Excise	740	714
Total current tax expense	1,737	1,309
Deferred tax expense:
Federal	5,806	2,807
State	571	981
Total deferred tax expense	6,377	3,788
Total income tax provision	$ 8,114	$ 5,097

COMMON STOCK (Details)

COMMON STOCK (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Subsidiary, Sale of Stock [Line Items]
Proceeds from public offering of common stock, net of offering costs		$ 40,896	$ 63,522
At-The-Market Offerings
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)		1,055,416		5,407,382
Proceeds from public offering of common stock, net of offering costs		$ 41,300		$ 212,400
Sale of stock, consideration received on transaction, net		$ 40,900		$ 209,900
Sale of stock, shares not yet settled (in shares)		27,570
Sale of stock, shares authorized under agreement (in shares)	15,000,000
Sale of stock, remaining number of shares authorized to be purchased (in shares)		9,407,268
At-The-Market Offerings | Weighted Average
Subsidiary, Sale of Stock [Line Items]
Sale of stock, price per share (in dollars per share)		$ 39.15		$ 39.29
Public Equity Offering
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)				1,345,500
Sale of stock, price per share (in dollars per share)				$ 42.85
Sale of stock, consideration received on transaction, net				$ 55,100
Over-Allotment Option
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)				175,500

DIVIDEND REINVESTMENT PLAN (Det

DIVIDEND REINVESTMENT PLAN (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Equity [Abstract]
DRIP participation	$ 7,808	$ 4,813
Shares issued for DRIP (in shares)	199,282	114,043

SHARE-BASED COMPENSATION - Narr

SHARE-BASED COMPENSATION - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share‑based compensation	$ 4,100	$ 2,818
Share-based payment arrangement, nonvested award, vested fair value	$ 1,400
Restricted Stock
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period	3 years
Share‑based compensation	$ (4,100)	$ 2,800
Share-based payment arrangement, nonvested award, excluding option, cost not yet recognized, amount	$ 21,600
Share-based payment arrangement, nonvested award, cost not yet recognized, period for recognition	2 years 2 months 12 days
Restricted Stock | Main Street Capital Corporation 2022 Equity and Incentive Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period	3 years

SHARE-BASED COMPENSATION - Rest

SHARE-BASED COMPENSATION - Restricted Stock Authorized and Available for Issuance (Details) - Restricted Stock	3 Months Ended
	Mar. 31, 2023 shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Less net restricted stock granted (in shares)	(34,547)
Main Street Capital Corporation 2022 Equity and Incentive Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Restricted stock authorized under the plan (in shares)	5,000,000
Less net restricted stock granted (in shares)	(48,792)
Restricted stock available for issuance (in shares)	4,951,208
Main Street Capital Corporation 2022 Non-Employee Director Restricted Stock Plan | Director
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Restricted stock authorized under the plan (in shares)	300,000
Less net restricted stock granted (in shares)	(3,825)
Restricted stock available for issuance (in shares)	296,175

SHARE-BASED COMPENSATION - Re_2

SHARE-BASED COMPENSATION - Restricted Share Awards (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Weighted-Average Grant-Date Fair Value
Shares withheld for payroll taxes paid (in shares)	10,489
Restricted Stock
Number of Shares
Nonvested beginning balance (in shares)	809,275	817,401
Granted (in shares)	34,547
Vested (in shares)	(35,092)
Forfeited (in shares)	(7,581)
Weighted-Average Grant-Date Fair Value
Nonvested beginning balance (in dollars per share)	$ 38.78
Granted (in dollars per share)	38.70
Vested (in dollars per share)	39.16
Forfeited (in dollars per share)	40.72
Nonvested ending balance (in dollars per share)	$ 38.74
Aggregate intrinsic value	$ 31,934,000
Vesting period	3 years
Shares withheld for payroll taxes paid (in shares)	10,489
Share price (in dollars per share)	$ 39.46

COMMITMENTS AND CONTINGENCIES -

COMMITMENTS AND CONTINGENCIES - Outstanding Commitments (Details) $ in Thousands	Mar. 31, 2023 USD ($) investment
Other Commitments [Line Items]
Committed capital	$ 255,283
Equity
Other Commitments [Line Items]
Committed capital	26,623
Debt
Other Commitments [Line Items]
Committed capital	$ 228,660
Other Portfolio investments
Other Commitments [Line Items]
Contractual obligation, number of additional investments, investment period expired with remaining commitments restricted for fund expenses | investment	6
Contractual obligation, number of additional investments, investment period expired with remaining commitments restricted for fund expenses or follow on investments in existing portfolio companies | investment	3
Investment, Identifier [Axis]: 2717 MH, L.P.
Other Commitments [Line Items]
Committed capital	$ 52
Investment, Identifier [Axis]: AAC Holdings, Inc.
Other Commitments [Line Items]
Committed capital	240
Investment, Identifier [Axis]: AB Centers Acquisition Corporation
Other Commitments [Line Items]
Committed capital	1,112
Investment, Identifier [Axis]: AMEREQUIP LLC.
Other Commitments [Line Items]
Committed capital	7,704
Investment, Identifier [Axis]: ASC Interests, LLC
Other Commitments [Line Items]
Committed capital	300
Investment, Identifier [Axis]: ATS Operating, LLC
Other Commitments [Line Items]
Committed capital	1,440
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC
Other Commitments [Line Items]
Committed capital	1,474
Investment, Identifier [Axis]: Acousti Engineering Company of Florida
Other Commitments [Line Items]
Committed capital	53
Investment, Identifier [Axis]: Acumera, Inc.
Other Commitments [Line Items]
Committed capital	15
Investment, Identifier [Axis]: Adams Publishing Group, LLC
Other Commitments [Line Items]
Committed capital	394
Investment, Identifier [Axis]: American Health Staffing Group, Inc.
Other Commitments [Line Items]
Committed capital	1,333
Investment, Identifier [Axis]: ArborWorks, LLC
Other Commitments [Line Items]
Committed capital	2,339
Investment, Identifier [Axis]: Archer Systems, LLC
Other Commitments [Line Items]
Committed capital	7,115
Investment, Identifier [Axis]: Batjer TopCo, LLC
Other Commitments [Line Items]
Committed capital	2,700
Investment, Identifier [Axis]: Bettercloud, Inc.
Other Commitments [Line Items]
Committed capital	4,189
Investment, Identifier [Axis]: Bluestem Brands, Inc.
Other Commitments [Line Items]
Committed capital	2,154
Investment, Identifier [Axis]: Brightwood Capital Fund III, LP
Other Commitments [Line Items]
Committed capital	300
Investment, Identifier [Axis]: Brightwood Capital Fund V, LP
Other Commitments [Line Items]
Committed capital	3,000
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc.
Other Commitments [Line Items]
Committed capital	1,549
Investment, Identifier [Axis]: Career Team Holdings, LLC
Other Commitments [Line Items]
Committed capital	1,800
Investment, Identifier [Axis]: CaseWorthy, Inc.
Other Commitments [Line Items]
Committed capital	2,459
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC
Other Commitments [Line Items]
Committed capital	2,400
Investment, Identifier [Axis]: Chamberlin Holding LLC
Other Commitments [Line Items]
Committed capital	1,600
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC
Other Commitments [Line Items]
Committed capital	4,346
Investment, Identifier [Axis]: Clad-Rex Steel, LLC
Other Commitments [Line Items]
Committed capital	400
Investment, Identifier [Axis]: Classic H&G Holdco, LLC
Other Commitments [Line Items]
Committed capital	3,440
Investment, Identifier [Axis]: Cody Pools, Inc.
Other Commitments [Line Items]
Committed capital	1,896
Investment, Identifier [Axis]: Colonial Electric Company LLC
Other Commitments [Line Items]
Committed capital	1,600
Investment, Identifier [Axis]: DTE Enterprises, LLC
Other Commitments [Line Items]
Committed capital	750
Investment, Identifier [Axis]: Dalton US Inc.
Other Commitments [Line Items]
Committed capital	16,865
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc.
Other Commitments [Line Items]
Committed capital	4,250
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC
Other Commitments [Line Items]
Committed capital	967
Investment, Identifier [Axis]: Elgin AcquireCo, LLC
Other Commitments [Line Items]
Committed capital	1,877
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC
Other Commitments [Line Items]
Committed capital	1,638
Investment, Identifier [Axis]: Evergreen North America Acquisitions, LLC
Other Commitments [Line Items]
Committed capital	1,313
Investment, Identifier [Axis]: Flame King Holdings, LLC
Other Commitments [Line Items]
Committed capital	400
Investment, Identifier [Axis]: Freeport Financial SBIC Fund LP
Other Commitments [Line Items]
Committed capital	3,841
Investment, Identifier [Axis]: Freeport First Lien Loan Fund III LP
Other Commitments [Line Items]
Committed capital	6,733
Investment, Identifier [Axis]: GRT Rubber Technologies LLC
Other Commitments [Line Items]
Committed capital	2,385
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC
Other Commitments [Line Items]
Committed capital	1,136
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC
Other Commitments [Line Items]
Committed capital	1,868
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC
Other Commitments [Line Items]
Committed capital	1,200
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC
Other Commitments [Line Items]
Committed capital	400
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC
Other Commitments [Line Items]
Committed capital	10,125
Investment, Identifier [Axis]: HPEP 3, L.P.
Other Commitments [Line Items]
Committed capital	1,555
Investment, Identifier [Axis]: HPEP 4, L.P.
Other Commitments [Line Items]
Committed capital	7,668
Investment, Identifier [Axis]: HPEP 423 COR, LP
Other Commitments [Line Items]
Committed capital	600
Investment, Identifier [Axis]: IG Parent Corporation
Other Commitments [Line Items]
Committed capital	2,500
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC
Other Commitments [Line Items]
Committed capital	2,520
Investment, Identifier [Axis]: Interface Security Systems, L.L.C
Other Commitments [Line Items]
Committed capital	1
Investment, Identifier [Axis]: Invincible Boat Company, LLC.
Other Commitments [Line Items]
Committed capital	353
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC
Other Commitments [Line Items]
Committed capital	8,421
Investment, Identifier [Axis]: Jackmont Hospitality, Inc.
Other Commitments [Line Items]
Committed capital	400
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC
Other Commitments [Line Items]
Committed capital	500
Investment, Identifier [Axis]: Johnson Downie Opco, LLC
Other Commitments [Line Items]
Committed capital	1,800
Investment, Identifier [Axis]: KMS, LLC
Other Commitments [Line Items]
Committed capital	1,086
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC
Other Commitments [Line Items]
Committed capital	2,023
Investment, Identifier [Axis]: MS Private Loan Fund I, LP 1
Other Commitments [Line Items]
Committed capital	750
Investment, Identifier [Axis]: MS Private Loan Fund I, LP 2
Other Commitments [Line Items]
Committed capital	10,000
Investment, Identifier [Axis]: Mako Steel, LP
Other Commitments [Line Items]
Committed capital	1,826
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC
Other Commitments [Line Items]
Committed capital	2,795
Investment, Identifier [Axis]: Microbe Formulas, LLC
Other Commitments [Line Items]
Committed capital	3,601
Investment, Identifier [Axis]: MonitorUS Holding, LLC
Other Commitments [Line Items]
Committed capital	1,634
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC
Other Commitments [Line Items]
Committed capital	800
Investment, Identifier [Axis]: NWN Corporation
Other Commitments [Line Items]
Committed capital	2,335
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC
Other Commitments [Line Items]
Committed capital	2,500
Investment, Identifier [Axis]: NinjaTrader, LLC
Other Commitments [Line Items]
Committed capital	7,472
Investment, Identifier [Axis]: Orttech Holdings, LLC
Other Commitments [Line Items]
Committed capital	800
Investment, Identifier [Axis]: PPL RVs, Inc.
Other Commitments [Line Items]
Committed capital	2,000
Investment, Identifier [Axis]: PTL US Bidco, Inc
Other Commitments [Line Items]
Committed capital	8,110
Investment, Identifier [Axis]: Paragon Healthcare, Inc.
Other Commitments [Line Items]
Committed capital	3,245
Investment, Identifier [Axis]: Pearl Meyer Topco LLC
Other Commitments [Line Items]
Committed capital	1,500
Investment, Identifier [Axis]: Project BarFly, LLC
Other Commitments [Line Items]
Committed capital	760
Investment, Identifier [Axis]: Project Eagle Holdings, LLC
Other Commitments [Line Items]
Committed capital	1,250
Investment, Identifier [Axis]: RA Outdoors LLC
Other Commitments [Line Items]
Committed capital	894
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC
Other Commitments [Line Items]
Committed capital	1,370
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc.
Other Commitments [Line Items]
Committed capital	4,500
Investment, Identifier [Axis]: Roof Opco, LLC
Other Commitments [Line Items]
Committed capital	1,556
Investment, Identifier [Axis]: SI East, LLC
Other Commitments [Line Items]
Committed capital	7,500
Investment, Identifier [Axis]: SPAU Holdings, LLC
Other Commitments [Line Items]
Committed capital	3,194
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC
Other Commitments [Line Items]
Committed capital	4,465
Investment, Identifier [Axis]: The Affiliati Network, LLC
Other Commitments [Line Items]
Committed capital	2,000
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC
Other Commitments [Line Items]
Committed capital	1,600
Investment, Identifier [Axis]: UnionRock Energy Fund II, LP
Other Commitments [Line Items]
Committed capital	2,124
Investment, Identifier [Axis]: VVS Holdco, LLC
Other Commitments [Line Items]
Committed capital	3,200
Investment, Identifier [Axis]: Veregy Consolidated, Inc.
Other Commitments [Line Items]
Committed capital	5,875
Investment, Identifier [Axis]: Wahoo Fitness Acquisition L.L.C.
Other Commitments [Line Items]
Committed capital	1,000
Investment, Identifier [Axis]: Wall Street Prep, Inc.
Other Commitments [Line Items]
Committed capital	400
Investment, Identifier [Axis]: Watterson Brands, LLC
Other Commitments [Line Items]
Committed capital	3,453
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC
Other Commitments [Line Items]
Committed capital	2,411
Investment, Identifier [Axis]: Winter Services LLC
Other Commitments [Line Items]
Committed capital	4,444
Investment, Identifier [Axis]: Xenon Arc, Inc.
Other Commitments [Line Items]
Committed capital	11,340
Brightwood Capital Fund Investments | Equity
Other Commitments [Line Items]
Committed capital	3,300
Freeport Fund Investments | Equity
Other Commitments [Line Items]
Committed capital	10,574
Harris Preston Fund Investments | Equity
Other Commitments [Line Items]
Committed capital	$ 9,875

RELATED PARTY TRANSACTIONS (Det

RELATED PARTY TRANSACTIONS (Details) - Affiliated Entity - USD ($) $ in Millions		1 Months Ended			3 Months Ended
	Dec. 29, 2021	Mar. 31, 2022	Feb. 28, 2022	Dec. 31, 2020	Mar. 31, 2023	May 31, 2022
External Investment Manager
Related Party Transaction [Line Items]
Receivable					$ 9.4
MSC Income
Related Party Transaction [Line Items]
Shares acquired (in shares)					94,697	94,697
Operating Expenses and Amount Due From Tax Sharing Agreement | External Investment Manager
Related Party Transaction [Line Items]
Receivable					$ 6.3
Dividends Declared But Not Yet Paid | External Investment Manager
Related Party Transaction [Line Items]
Receivable					3.1
Investment Management Agreement | Private Loan Fund
Related Party Transaction [Line Items]
Amount of transaction			$ 15	$ 10
Funded commitments					14.3
Unfunded commitments					0.7
Unsecured Revolving Promissory Note | Private Loan Fund
Related Party Transaction [Line Items]
Amount of transaction	$ 85
Interest rate	5%
Secured Revolving Promissory Note | Private Loan Fund
Related Party Transaction [Line Items]
Amount of transaction		$ 10
Interest rate		5%
Unused capacity, commitment fee percentage		0.25%
2015 Deferred Compensation Plan
Related Party Transaction [Line Items]
Amount of transaction					$ 17.2
2015 Deferred Compensation Plan | Common Stock
Related Party Transaction [Line Items]
Deferred compensation (in shares)					156,122
2015 Deferred Compensation Plan | Phantom Stock Units
Related Party Transaction [Line Items]
Amount of transaction					$ 6.2

SUBSEQUENT EVENTS (Details)

SUBSEQUENT EVENTS (Details) - $ / shares		3 Months Ended	192 Months Ended
	May 05, 2023	Sep. 30, 2023	Sep. 30, 2023
Forecast
Subsequent Event [Line Items]
Common stock, monthly dividend, per share, declared (in dollars per share)		$ 0.69
Increase common stock, monthly dividend, cash paid		7%
Common stock, cumulative monthly dividend and supplemental dividend, per share, paid (in dollars per share)			$ 37.56
Subsequent Event
Subsequent Event [Line Items]
Common stock, supplemental cash dividend, per share, declared (in dollars per share)	$ 0.225
Subsequent Event | Dividends, April to June 2023
Subsequent Event [Line Items]
Common stock, monthly dividend, per share, declared (in dollars per share)	0.225
Subsequent Event | Dividends, July to September 2023
Subsequent Event [Line Items]
Common stock, monthly dividend, per share, declared (in dollars per share)	$ 0.23

Consolidated Schedule of Inve_5

Consolidated Schedule of Investments In and Advances to Affiliates (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023		Mar. 31, 2022	Dec. 31, 2022
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ (28,379)		$ 3,336
Amount of Unrealized Gain/(Loss)		35,118		14,752
Control investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		(2,966)		0
Amount of Unrealized Gain/(Loss)		17,161		8,279
Amount of Interest, Fees or Dividends Credited to Income		48,862		32,577
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,703,172		1,489,257
Gross Additions		83,687		122,644
Gross Reductions		55,770		119,115
Ending balance		1,746,003		1,486,663
Control investments | Midwest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 444,151		$ 338,390
Net assets, percentage		25.40%		22.80%
Control investments | Northeast
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance				$ 134,636
Net assets, percentage				9.10%
Control investments | Southeast
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 49,003		$ 18,443
Net assets, percentage		2.80%		1.20%
Control investments | Southwest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 639,016		$ 587,631
Net assets, percentage		36.60%		39.50%
Control investments | West
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 450,653		$ 407,563
Net assets, percentage		25.80%		27.40%
Control investments | Northeast Region and Canada
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 163,180
Net assets, percentage		9.30%
Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ (26,264)		$ 692
Amount of Unrealized Gain/(Loss)		33,141		3,041
Amount of Interest, Fees or Dividends Credited to Income		17,456		13,917
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		618,359		549,214
Gross Additions		81,567		13,981
Gross Reductions		58,785		9,879
Ending balance		626,227		559,439
Affiliate investments | Midwest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 77,468		$ 69,637
Net assets, percentage		12.40%		12.40%
Affiliate investments | Northeast
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance				$ 100,269
Net assets, percentage				17.90%
Affiliate investments | Southeast
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 200,667		$ 165,903
Net assets, percentage		32%		29.70%
Affiliate investments | Southwest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 84,732		$ 107,324
Net assets, percentage		13.50%		19.20%
Affiliate investments | West
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 153,817		$ 116,306
Net assets, percentage		24.60%		20.80%
Affiliate investments | Northeast Region and Canada
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 109,543
Net assets, percentage		17.50%
Investment, Identifier [Axis]: 2717 MH, L.P., LP Interests (2717 HPP-MS, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		248		0
Gross Additions		0		244
Gross Reductions		0		0
Ending balance		248		244
Investment, Identifier [Axis]: 2717 MH, L.P., LP Interests (2717 MH, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		631		0
Amount of Unrealized Gain/(Loss)		(675)		189
Amount of Interest, Fees or Dividends Credited to Income		141		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		7,552		3,971
Gross Additions		1,031		346
Gross Reductions		1,574		0
Ending balance		7,009		4,317
Investment, Identifier [Axis]: AAC Holdings, Inc., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0		2,079
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		$ 0		$ 2,079
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate				18%	18%	[1]
PIK Rate				8%	18%	[1]
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				30
Amount of Interest, Fees or Dividends Credited to Income				478
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				9,794
Gross Additions				250
Gross Reductions				0
Ending balance				10,044
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[2]	18%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(6)
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		315
Gross Reductions		6
Ending balance		$ 309
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[2]	18%
PIK Rate	[2]	18%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(268)
Amount of Interest, Fees or Dividends Credited to Income		572
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		11,550
Gross Additions		572
Gross Reductions		267
Ending balance		11,855
Investment, Identifier [Axis]: AAC Holdings, Inc., Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0		1,940
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		$ 0		1,940
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[3],[4]	13%
Spread		5%	[3],[4]		6%	[5],[6],[7],[8]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.80%	[3],[4],[9],[10]		10.20%	[5],[6],[7]
Spread		6%	[3],[4],[9],[10]		6%	[5],[6],[7]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.79%	[3],[4],[9]		10.58%	[5],[6],[7]
Spread		6%	[3],[4],[9]		6%	[5],[6],[7]
Investment, Identifier [Axis]: ADS Tactical, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.59%	[2],[4]		10.14%	[1],[7]
Spread		5.75%	[2],[4]		5.75%	[1],[7]
Investment, Identifier [Axis]: AFG Capital Group, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		0		610
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		9,400		7,740
Gross Additions		0		610
Gross Reductions		0		0
Ending balance		$ 9,400		$ 8,350
Investment, Identifier [Axis]: AFG Capital Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				10%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				144
Gross Additions				0
Gross Reductions				86
Ending balance				58
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 1
Schedule of Investments [Line Items]
Spread		7.40%	[3],[4],[9],[11]		7.40%	[5],[6],[7],[8]
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.10%	[3],[4],[9]		11.72%	[5],[6],[7]
Spread		7.40%	[3],[4],[9]		7.40%	[5],[6],[7]
Investment, Identifier [Axis]: ASC Interests, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		(100)		80
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		800		720
Gross Additions		0		80
Gross Reductions		100		0
Ending balance		$ 700		$ 800
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13%		13%	13%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		13		7
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		400		200
Gross Additions		0		0
Gross Reductions		0		30
Ending balance		$ 400		$ 170
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%		13%	13%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		54		59
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,649		1,636
Gross Additions		0		6
Gross Reductions		0		0
Ending balance		$ 1,649		1,642
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				(576)
Amount of Interest, Fees or Dividends Credited to Income				0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				4,894
Gross Additions				0
Gross Reductions				576
Ending balance				$ 4,318
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Preferred Member Units 1
Schedule of Investments [Line Items]
Total Rate		14.13%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		0
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		84
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		3,504
Gross Additions		84
Gross Reductions		0
Ending balance		$ 3,588
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Secured Debt
Schedule of Investments [Line Items]
Total Rate				12%
Spread				10%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				170
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				4,736
Gross Additions				23
Gross Reductions				70
Ending balance				$ 4,689
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Secured Debt 1
Schedule of Investments [Line Items]
Spread		10%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		(3)
Gross Additions		1
Gross Reductions		0
Ending balance		$ (2)
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.75%
Spread		10%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		188
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		4,545
Gross Additions		20
Gross Reductions		70
Ending balance		4,495
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[3],[4]	11.39%
Spread		6.50%	[3],[4],[9]		5.50%	[5],[6],[7],[8]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.09%	[3],[4],[9]		9.32%	[5],[6],[7]
Spread		5.50%	[3],[4],[9]		5.50%	[5],[6],[7]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.09%	[3],[4],[9]		11.32%	[5],[6],[7]
Spread		7.50%	[3],[4],[9]		7.50%	[5],[6],[7]
Investment, Identifier [Axis]: ATS Workholding, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				5%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				3,005
Gross Additions				0
Gross Reductions				0
Ending balance				$ 3,005
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		5%	[3],[12]		5%	[5],[13]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(132)
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		634
Gross Additions		21
Gross Reductions		132
Ending balance		$ 523
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		5%	[3],[12]		5%	[5],[13]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(186)
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,005
Gross Additions		0
Gross Reductions		185
Ending balance		820
Investment, Identifier [Axis]: ATX Networks Corp., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		3,248
Amount of Unrealized Gain/(Loss)		(3,270)
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		3,270
Gross Additions		3,248
Gross Reductions		6,518
Ending balance		$ 0
Investment, Identifier [Axis]: ATX Networks Corp., Secured Debt
Schedule of Investments [Line Items]
Total Rate				8.50%	12.23%	[1],[7]
Spread		7.50%		7.50%	7.50%	[1],[7]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(134)		230
Amount of Interest, Fees or Dividends Credited to Income		886		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		6,343		7,092
Gross Additions		575		230
Gross Reductions		6,918		0
Ending balance		$ 0		$ 7,322
Investment, Identifier [Axis]: ATX Networks Corp., Unsecured Debt
Schedule of Investments [Line Items]
Total Rate				10%	10%	[1]
PIK Rate		10%		10%	10%	[1]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(306)		82
Amount of Interest, Fees or Dividends Credited to Income		1,160		77
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		2,598		1,963
Gross Additions		1,160		159
Gross Reductions		3,758		0
Ending balance		$ 0		2,122
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[3],[4],[9]	12.52%
Spread		7.75%	[3],[4],[9]		7.25%	[5],[6],[7],[8]
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.61%	[3],[4],[9]		12.17%	[5],[6],[7]
Spread		7.75%	[3],[4],[9]		7.25%	[5],[6],[7]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.50%	[3],[4]		13.23%	[5],[7]
Spread		7.50%	[3],[4]		8.50%	[5],[7]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.50%	[3],[4]		13.23%	[5],[7]
Spread		7.50%	[3],[4]		8.50%	[5],[7]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		19.50%	[3],[4]		16.17%	[5],[7]
Spread		11.50%	[3],[4]		12.50%	[5],[7]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		14.13%	[3],[4]		13.88%	[5],[7]
Spread		9.50%	[3],[4]		9.50%	[5],[7]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.13%	[3],[4]		13.57%	[5],[7]
Spread		9.50%	[3],[4]		9%	[5],[7]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[3],[4]	14.13%
Spread	[3],[4]	9.50%
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10%	[3],[4],[14]		10%	[5],[7],[15]
Spread		6.50%	[3],[4],[14]		6%	[5],[7],[15]
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10%	[3],[4],[16]		10%	[5],[7],[15]
Spread		7.50%	[3],[4],[16]		7.50%	[5],[7],[15]
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		6%	[3],[4],[11]		6%	[5],[7],[8]
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.12%	[3],[4]		11.12%	[5],[7]
Spread		6%	[3],[4]		6%	[5],[7]
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.49%	[3],[4],[9]		10.46%	[5],[6],[7]
Spread		6.75%	[3],[4],[9]		6.75%	[5],[6],[7]
PIK Rate	[3],[4],[9]	1%
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.49%	[3],[4],[9]		12.46%	[5],[6],[7]
Spread		8.75%	[3],[4],[9]		8.75%	[5],[6],[7]
PIK Rate	[3],[4],[9]	1%
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		7.50%	[2],[12]		7.50%	[1],[13]
Spread		6.50%	[2],[12]		6.50%	[1],[13]
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		7.50%	[2],[4],[12]		7.50%	[1],[7],[13]
Spread		6.50%	[2],[4],[12]		6.50%	[1],[7],[13]
Investment, Identifier [Axis]: Amounts related to investments transferred to or from other 1940 Act classification during the period, Affiliate Investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				(6,123)
Gross Additions				0
Gross Reductions				0
Ending balance				0
Investment, Identifier [Axis]: Amounts related to investments transferred to or from other 1940 Act classification during the period, Control Investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		(171)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		(14,914)
Gross Additions		0
Gross Reductions		0
Ending balance		0
Investment, Identifier [Axis]: Amounts related to investments transferred to or from other 1940 Act classification during the period, Affiliate Investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		171
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		14,914
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: Amounts related to investments transferred to or from other 1940 Act classification during the period, Control Investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				(236)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				6,123
Gross Additions				0
Gross Reductions				0
Ending balance				0
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Total Rate		14.13%			14.13%
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		10%	[4],[11]		10%	[7],[8]
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.75%	[4]		14.13%	[7]
Spread		10%	[4]		10%	[7]
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		14.83%	[3],[4],[9]		13.41%	[5],[7]
Spread		7%	[3],[4],[9]		9%	[5],[7]
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.83%	[3],[4],[9]		13.56%	[5],[7]
Spread		7%	[3],[4],[9]		9%	[5],[7]
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6%	[3],[4],[9],[11]		6.50%	[5],[6],[7],[8]
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.72%	[3],[4],[9]		10.92%	[5],[6],[7]
Spread		6%	[3],[4],[9]		6.50%	[5],[6],[7]
Investment, Identifier [Axis]: Arrow International, Inc, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.15%	[3],[4],[17]		10.36%	[5],[6],[7],[18]
Spread		5.40%	[3],[4],[17]		6.60%	[5],[6],[7],[18]
Investment, Identifier [Axis]: BBB Tank Services, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0		0
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		$ 0		0
Investment, Identifier [Axis]: BBB Tank Services, LLC, Preferred Stock (non-voting)
Schedule of Investments [Line Items]
Total Rate		15%			15%
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0		0
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		$ 0		$ 0
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt
Schedule of Investments [Line Items]
Total Rate				12%
Spread				11%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				(209)
Amount of Interest, Fees or Dividends Credited to Income				144
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				2,507
Gross Additions				0
Gross Reductions				209
Ending balance				2,298
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.66%	[4],[19]		15.12%	[7],[20]
Spread		11%	[4],[19]		11%	[7],[20]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		31
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		800
Gross Additions		0
Gross Reductions		0
Ending balance		$ 800
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.66%	[4],[19]		15.12%	[7],[20]
Spread		11%	[4],[19]		11%	[7],[20]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		155
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		2,086
Gross Additions		0
Gross Reductions		0
Ending balance		2,086
Investment, Identifier [Axis]: Barfly Ventures, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		(280)		120
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		3,320		1,930
Gross Additions		0		120
Gross Reductions		283		0
Ending balance		$ 3,037		$ 2,050
Investment, Identifier [Axis]: Barfly Ventures, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		7%	[3]	7%	7%	[5]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		30		12
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		711		711
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		711		711
Investment, Identifier [Axis]: Batjer TopCo, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				0
Gross Additions				4,073
Gross Reductions				0
Ending balance				$ 4,073
Investment, Identifier [Axis]: Batjer TopCo, LLC, Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		2,055
Amount of Interest, Fees or Dividends Credited to Income		167
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		4,095
Gross Additions		2,055
Gross Reductions		0
Ending balance		6,150
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				11%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				196
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				0
Gross Additions				10,917
Gross Reductions				0
Ending balance				10,917
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		(8)
Gross Additions		1
Gross Reductions		0
Ending balance		$ (7)
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11%			11%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		311
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		10,933
Gross Additions		9
Gross Reductions		450
Ending balance		$ 10,492
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 1
Schedule of Investments [Line Items]
Total Rate		8%	[3],[21],[22]		8%	[5],[23],[24]
PIK Rate		8%	[3],[21],[22]		8%	[5],[23],[24]
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 2
Schedule of Investments [Line Items]
PIK Rate		16%	[3],[11],[21],[22]		16%	[5],[8],[23],[24]
Investment, Identifier [Axis]: Berry Aviation, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%	[3]		12%	[5]
PIK Rate		1.50%	[3]		1.50%	[5]
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		7%	[3],[4],[9],[11]		1%	[5],[6],[7],[8]
PIK Rate		6%	[3],[4],[9],[11]		6%	[5],[6],[7],[8]
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.89%	[3],[4],[9]		11.40%	[5],[6],[7]
Spread		7%	[3],[4],[9]		1%	[5],[6],[7]
PIK Rate		6%	[3],[4],[9]		6%	[5],[6],[7]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[2],[4]	15.50%
Spread		7.50%	[2],[4]		8.50%	[1],[7],[8]
PIK Rate	[2],[4]	14.50%
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.07%	[2],[4]		12.94%	[1],[7]
Spread		8.50%	[2],[4]		8.50%	[1],[7]
PIK Rate	[2],[4]	12.07%
Investment, Identifier [Axis]: Boccella Precast Products LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		(200)		0
Amount of Interest, Fees or Dividends Credited to Income		29		40
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		2,970		4,830
Gross Additions		0		0
Gross Reductions		200		0
Ending balance		$ 2,770		$ 4,830
Investment, Identifier [Axis]: Boccella Precast Products LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10%		10%	10%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		8		8
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		320		320
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		$ 320		320
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Class A Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				292
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				10,194
Gross Additions				0
Gross Reductions				10,194
Ending balance				0
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Class B Preferred Member Units
Schedule of Investments [Line Items]
Total Rate		8%	[21]		8%	[23]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		0		2,760
Amount of Interest, Fees or Dividends Credited to Income		1,096		368
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		31,420		23,170
Gross Additions		0		2,760
Gross Reductions		0		0
Ending balance		$ 31,420		$ 25,930
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.91%	[4],[9],[25]	10.50%	13.39%	[6],[7],[26]
Spread		9.22%	[4],[9],[25]	9%	9.26%	[6],[7],[26]
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				(20)
Amount of Interest, Fees or Dividends Credited to Income				1,160
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				39,000
Gross Additions				10,214
Gross Reductions				20
Ending balance				49,194
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.91%
Spread		9.22%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(36)
Amount of Interest, Fees or Dividends Credited to Income		3,431
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		99,194
Gross Additions		36
Gross Reductions		695
Ending balance		$ 98,535
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.50%	[4],[12],[19]		12.50%	[5],[7],[13],[20]
Spread		9.25%	[4],[12],[19]		9.25%	[5],[7],[13],[20]
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%	[4],[12],[19]		12.50%	[5],[7],[13],[20]
Spread		9.25%	[4],[12],[19]		9.25%	[5],[7],[13],[20]
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		(520)		70
Amount of Interest, Fees or Dividends Credited to Income		30		265
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		7,080		7,710
Gross Additions		0		70
Gross Reductions		520		0
Ending balance		$ 6,560		$ 7,780
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.66%	[4]	11%	14.12%	[7]
Spread		10%	[4]	10%	10%	[7]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		212		224
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		5,964		8,037
Gross Additions		0		6
Gross Reductions		124		124
Ending balance		5,840		7,919
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		25		25
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,000		1,000
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		$ 1,000		$ 1,000
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13%		13%	13%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		286		286
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		8,813		8,813
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		$ 8,813		$ 8,813
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%	[22]	13%	13%	[24]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		32		33
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,000		1,000
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		1,000		1,000
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				200
Amount of Interest, Fees or Dividends Credited to Income				0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				4,060
Gross Additions				200
Gross Reductions				0
Ending balance				4,260
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,828
Gross Additions		0
Gross Reductions		0
Ending balance		1,828
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		2,512
Gross Additions		0
Gross Reductions		0
Ending balance		$ 2,512
Investment, Identifier [Axis]: Brightwood Capital Fund Investments - Fund V, LP Interests (Brightwood Capital Fund V, LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				139
Amount of Interest, Fees or Dividends Credited to Income				0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				1,000
Gross Additions				639
Gross Reductions				0
Ending balance				$ 1,639
Investment, Identifier [Axis]: Buca C, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Total Rate		6%			6%
PIK Rate		6%			6%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12.25%	9%
Spread				11.25%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		521		540
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		12,337		14,370
Gross Additions		0		0
Gross Reductions		375		0
Ending balance		$ 11,962		14,370
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[3],[4]	9.83%
Spread		5%	[3],[4]		5%	[5],[7],[8]
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		9.63%	[3],[4]		8.91%	[5],[7]
Spread		5%	[3],[4]		5%	[5],[7]
Investment, Identifier [Axis]: CBT Nuggets, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		860		(1,740)
Amount of Interest, Fees or Dividends Credited to Income		1,235		412
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		49,002		50,620
Gross Additions		858		0
Gross Reductions		0		1,740
Ending balance		49,860		48,880
Investment, Identifier [Axis]: CMS Minerals Investments, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		(431)		192
Amount of Interest, Fees or Dividends Credited to Income		44		43
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,670		1,974
Gross Additions		0		192
Gross Reductions		435		109
Ending balance		$ 1,235		2,057
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[5],[7],[27]				11.99%
Spread	[5],[7],[27]				8.50%
PIK Rate	[5],[7],[27]				0.01%
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[3],[4]	13.14%
Spread	[3],[4]	6.50%
PIK Rate	[3],[4]	2%
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[3],[4]	13.14%
Spread	[3],[4]	6.50%
PIK Rate	[3],[4]	2%
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[3],[4]	13.33%
Spread	[3],[4]	6.50%
PIK Rate	[3],[4]	2%
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[3],[4]	13.23%
Spread	[3],[4]	6.50%
PIK Rate	[3],[4]	2%
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 5
Schedule of Investments [Line Items]
Total Rate	[3],[4]	13.33%
Spread	[3],[4]	6.50%
PIK Rate	[3],[4]	2%
Investment, Identifier [Axis]: Café Brazil, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		(370)		60
Amount of Interest, Fees or Dividends Credited to Income		16		52
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		2,210		2,570
Gross Additions		0		60
Gross Reductions		370		0
Ending balance		1,840		2,630
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		63		357
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		25,495		9,510
Gross Additions		0		357
Gross Reductions		0		0
Ending balance		$ 25,495		9,867
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Total Rate		15%	[21]		15%	[23]
PIK Rate		15%	[21]		15%	[23]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		0		3,990
Amount of Interest, Fees or Dividends Credited to Income		150		63
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		3,994		13,275
Gross Additions		150		3,990
Gross Reductions		0		0
Ending balance		$ 4,144		$ 17,265
Investment, Identifier [Axis]: California Splendor Holdings LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.88%	[4]	11%	13.75%	[7]
Spread		10%	[4]	10%	10%	[7]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(3)		0
Amount of Interest, Fees or Dividends Credited to Income		1,045		787
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		28,000		27,915
Gross Additions		3		17
Gross Reductions		3		0
Ending balance		$ 28,000		27,932
Investment, Identifier [Axis]: Camin Cargo Control, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.34%	[2],[4],[9]		10.88%	[1],[7]
Spread		6.50%	[2],[4],[9]		6.50%	[1],[7]
Investment, Identifier [Axis]: Career Team Holdings, LLC, Class A Common Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				4,499
Gross Additions				0
Gross Reductions				0
Ending balance				$ 4,499
Investment, Identifier [Axis]: Career Team Holdings, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		4,500
Gross Additions		0
Gross Reductions		0
Ending balance		$ 4,500
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12.50%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				645
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				20,050
Gross Additions				10
Gross Reductions				0
Ending balance				20,060
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6%	[4],[11]		6%	[7],[8]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		(9)
Gross Additions		1
Gross Reductions		1
Ending balance		$ (9)
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%			12.50%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		643
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		20,090
Gross Additions		10
Gross Reductions		0
Ending balance		$ 20,100
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		6%	[3],[4],[11]		6%	[5],[7],[8]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.73%	[3],[4]		10.73%	[5],[7]
Spread		6%	[3],[4]		6%	[5],[7]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.73%	[3],[4]		10.48%	[5],[7]
Spread		6%	[3],[4]		5.75%	[5],[7]
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		560		0
Amount of Interest, Fees or Dividends Credited to Income		30		30
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		8,700		5,840
Gross Additions		560		0
Gross Reductions		0		0
Ending balance		$ 9,260		$ 5,840
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12%
Spread				10%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				288
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				8,864
Gross Additions				7
Gross Reductions				233
Ending balance				8,638
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		9%	[4],[11]		9%	[7],[8]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.75%	[4]		13.13%	[7]
Spread		9%	[4]		9%	[7]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		517
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		14,954
Gross Additions		6
Gross Reductions		0
Ending balance		14,960
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		(120)		0
Amount of Interest, Fees or Dividends Credited to Income		285		295
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		22,920		24,140
Gross Additions		0		0
Gross Reductions		120		0
Ending balance		22,800		24,140
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		120		0
Amount of Interest, Fees or Dividends Credited to Income		23		17
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		2,710		1,540
Gross Additions		120		0
Gross Reductions		0		0
Ending balance		$ 2,830		$ 1,540
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				9%
Spread				8%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				(18)
Amount of Interest, Fees or Dividends Credited to Income				419
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				17,817
Gross Additions				18
Gross Reductions				154
Ending balance				17,681
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6%	[4],[9],[11]		6%	[7],[8]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.86%	[4],[9]		12.13%	[7]
Spread		8%	[4],[9]		8%	[7]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(6)
Amount of Interest, Fees or Dividends Credited to Income		540
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		16,945
Gross Additions		6
Gross Reductions		6
Ending balance		16,945
Investment, Identifier [Axis]: Chandler Signs Holdings, LLC, Class A Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		210		160
Amount of Interest, Fees or Dividends Credited to Income		36		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,790		460
Gross Additions		210		160
Gross Reductions		0		0
Ending balance		$ 2,000		620
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.06%	[3],[4],[9],[28]		10.72%	[5],[6],[7],[29]
Spread		6.25%	[3],[4],[9],[28]		6.25%	[5],[6],[7],[29]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.08%	[3],[4],[9],[28]		10.71%	[5],[6],[7],[30]
Spread		6.25%	[3],[4],[9],[28]		6.25%	[5],[6],[7],[30]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[3],[4],[9]	11.14%
Spread	[3],[4],[9]	6.25%
Investment, Identifier [Axis]: Charps, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		210		100
Amount of Interest, Fees or Dividends Credited to Income		196		209
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		13,340		13,990
Gross Additions		210		100
Gross Reductions		0		0
Ending balance		$ 13,550		$ 14,090
Investment, Identifier [Axis]: Charps, LLC, Unsecured Debt
Schedule of Investments [Line Items]
Total Rate		10%		10%	10%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(9)		(18)
Amount of Interest, Fees or Dividends Credited to Income		149		158
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		5,694		5,694
Gross Additions		9		18
Gross Reductions		9		18
Ending balance		5,694		5,694
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				80
Amount of Interest, Fees or Dividends Credited to Income				348
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				10,780
Gross Additions				80
Gross Reductions				0
Ending balance				$ 10,860
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(1,050)
Amount of Interest, Fees or Dividends Credited to Income		50
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		8,220
Gross Additions		0
Gross Reductions		1,050
Ending balance		7,170
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		220
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		610
Gross Additions		220
Gross Reductions		0
Ending balance		$ 830
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				10.50%
Spread		9%	[4],[9],[11]	9.50%	9%	[6],[7],[8]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		1		285
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0		10,401
Gross Additions		0		10
Gross Reductions		0		0
Ending balance		$ 0		$ 10,411
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.79%	[4],[9]	10%	13.23%	[6],[7]
Spread		9%	[4],[9]		9%	[6],[7]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		369		27
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		10,440		1,071
Gross Additions		11		0
Gross Reductions		480		8
Ending balance		$ 9,971		1,063
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10%			10%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		26
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,039
Gross Additions		0
Gross Reductions		8
Ending balance		$ 1,031
Investment, Identifier [Axis]: Clarius BIGS, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15%	[3],[12],[19]		15%	[5],[13],[20]
PIK Rate		15%	[3],[12],[19]		15%	[5],[13],[20]
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		1,062		1,020
Amount of Interest, Fees or Dividends Credited to Income		780		352
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		24,637		15,260
Gross Additions		1,063		1,020
Gross Reductions		0		0
Ending balance		$ 25,700		$ 16,280
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.88%	[4]	7%	9.75%	[7]
Spread		6%	[4]	6%	6%	[7]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		127		159
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		4,560		4,000
Gross Additions		0		3,600
Gross Reductions		0		0
Ending balance		$ 4,560		$ 7,600
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		8%		8%	8%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(11)		(11)
Amount of Interest, Fees or Dividends Credited to Income		396		396
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		19,274		19,274
Gross Additions		11		11
Gross Reductions		11		11
Ending balance		19,274		19,274
Investment, Identifier [Axis]: Cody Pools, Inc., Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		970		0
Amount of Interest, Fees or Dividends Credited to Income		29		687
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		58,180		47,640
Gross Additions		970		0
Gross Reductions		0		0
Ending balance		$ 59,150		$ 47,640
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate				12.25%
Spread				10.50%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				(23)
Amount of Interest, Fees or Dividends Credited to Income				1,380
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				42,484
Gross Additions				2,888
Gross Reductions				2,890
Ending balance				42,482
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.50%	[4]		15.38%	[7]
Spread		10.50%	[4]		10.50%	[7]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		11
Amount of Interest, Fees or Dividends Credited to Income		59
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,462
Gross Additions		13
Gross Reductions		421
Ending balance		$ 1,054
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.50%	[4]		15.38%	[7]
Spread		10.50%	[4]		10.50%	[7]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(20)
Amount of Interest, Fees or Dividends Credited to Income		1,577
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		40,801
Gross Additions		20
Gross Reductions		444
Ending balance		40,377
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		(960)		0
Amount of Interest, Fees or Dividends Credited to Income		(1,273)		369
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		9,160		9,130
Gross Additions		0		0
Gross Reductions		960		0
Ending balance		8,200		$ 9,130
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				745
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				24,351
Gross Additions				16
Gross Reductions				316
Ending balance				24,051
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%			12%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		704
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		23,151
Gross Additions		14
Gross Reductions		315
Ending balance		22,850
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		(1,390)		1,610
Amount of Interest, Fees or Dividends Credited to Income		158		158
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		19,830		12,000
Gross Additions		0		1,610
Gross Reductions		1,390		0
Ending balance		$ 18,440		$ 13,610
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.75%	[4]	10%
Spread		9%	[4]	9%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				(8)
Amount of Interest, Fees or Dividends Credited to Income				159
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				6,477
Gross Additions				8
Gross Reductions				688
Ending balance				5,797
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		9%			9%	[7],[8],[20]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.75%			13.13%	[7]
Spread		9%			9%	[7]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(3)
Amount of Interest, Fees or Dividends Credited to Income		180
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		5,241
Gross Additions		3
Gross Reductions		375
Ending balance		$ 4,869
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.34%	[3],[4],[31]		12.56%	[5],[7],[32]
Spread		7.50%	[3],[4],[31]		8%	[5],[7],[32]
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.35%	[3],[4]		12.56%	[5],[7]
Spread		7.50%	[3],[4]		8%	[5],[7]
Investment, Identifier [Axis]: Congruent Credit Opportunities Funds, LP Interests (Congruent Credit Opportunities Fund III, LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				163
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				9,959
Gross Additions				0
Gross Reductions				1,106
Ending balance				8,853
Investment, Identifier [Axis]: Congruent Credit Opportunities Funds, LP Interests (Congruent Credit Opportunities Fund III, LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		123
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		7,657
Gross Additions		0
Gross Reductions		876
Ending balance		6,781
Investment, Identifier [Axis]: Copper Trail Energy Fund I, LP - CTMH, LP Interests (CTMH, LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		588		710
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		588		710
Investment, Identifier [Axis]: DMA Industries, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		7,260		5,944
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		$ 7,260		$ 5,944
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%	12%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(11)		0
Amount of Interest, Fees or Dividends Credited to Income		647		647
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		21,200		20,993
Gross Additions		11		11
Gross Reductions		11		0
Ending balance		$ 21,200		21,004
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class A Preferred Member Units
Schedule of Investments [Line Items]
Total Rate		8%	[3]		8%	[5]
PIK Rate		8%	[3]		8%	[5]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class AA Preferred Member Units (non-voting)
Schedule of Investments [Line Items]
Total Rate		10%	[3],[21]		10%	[5],[23]
PIK Rate		10%	[3],[21]		10%	[5],[23]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		7.50%	[3],[4],[11]		7.50%	[5],[7],[8]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.44%	[3],[4]		12.24%	[5],[7]
Spread		7.50%	[3],[4]		7.50%	[5],[7]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.33%	[3],[4],[9],[33]		11.90%	[5],[6],[7]
Spread		7.50%	[3],[4],[9],[33]		8%	[5],[6],[7]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 2
Schedule of Investments [Line Items]
Spread		7.50%	[3],[4],[9],[11]		8%	[5],[6],[7],[8]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.26%	[3],[4],[9]		12.56%	[5],[6],[7]
Spread		7.50%	[3],[4],[9]		8%	[5],[6],[7]
Investment, Identifier [Axis]: Datacom, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		0		60
Amount of Interest, Fees or Dividends Credited to Income		0		24
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		2,670		2,610
Gross Additions		0		60
Gross Reductions		0		0
Ending balance		$ 2,670		$ 2,670
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				7.50%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				209
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				7,668
Gross Additions				43
Gross Reductions				68
Ending balance				7,643
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		7.50%			7.50%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		4
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		223
Gross Additions		227
Gross Reductions		0
Ending balance		$ 450
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10%			7.50%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		254
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		7,789
Gross Additions		39
Gross Reductions		67
Ending balance		7,761
Investment, Identifier [Axis]: Digital Products Holdings LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		50		50
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		9,835		9,835
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		$ 9,835		$ 9,835
Investment, Identifier [Axis]: Digital Products Holdings LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.75%	[4]	11%	14.13%	[7]
Spread		10%	[4]	10%	10%	[7]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		564		466
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		15,523		16,801
Gross Additions		9		12
Gross Reductions		329		330
Ending balance		15,203		16,483
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		(520)		4,100
Amount of Interest, Fees or Dividends Credited to Income		171		343
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		22,220		18,350
Gross Additions		0		4,100
Gross Reductions		520		0
Ending balance		21,700		$ 22,450
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate				12%
Spread				11%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				(18)
Amount of Interest, Fees or Dividends Credited to Income				752
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				24,048
Gross Additions				21
Gross Reductions				332
Ending balance				23,737
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread	[7],[8]				11%
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(7)
Amount of Interest, Fees or Dividends Credited to Income		11
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		7
Gross Reductions		7
Ending balance		$ 0
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14%			15.13%	[7]
Spread	[7]				11%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(14)
Amount of Interest, Fees or Dividends Credited to Income		959
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		27,267
Gross Additions		14
Gross Reductions		405
Ending balance		26,876
Investment, Identifier [Axis]: Dos Rios Partners, LP Interests (Dos Rios Partners - A, LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		0		28
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		2,898		3,280
Gross Additions		0		28
Gross Reductions		0		0
Ending balance		2,898		3,308
Investment, Identifier [Axis]: Dos Rios Partners, LP Interests (Dos Rios Partners, LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		156		90
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		9,127		10,329
Gross Additions		156		90
Gross Reductions		0		0
Ending balance		9,283		10,419
Investment, Identifier [Axis]: Dos Rios Stone Products LLC, Class A Preferred Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		250		(290)
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,330		640
Gross Additions		250		0
Gross Reductions		0		290
Ending balance		$ 1,580		350
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		9.18%	[3],[4],[9]		9.18%	[5],[6],[7]
Spread		4.50%	[3],[4],[9]		4.50%	[5],[6],[7]
PIK Rate		9.18%	[3],[4],[9]		9.18%	[5],[6],[7]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.18%	[3],[4],[9]		11.18%	[5],[6],[7]
Spread		6.50%	[3],[4],[9]		6.50%	[5],[6],[7]
PIK Rate		11.18%	[3],[4],[9]		11.18%	[5],[6],[7]
Investment, Identifier [Axis]: EIG Fund Investments, LP Interests (EIG Global Private Debt Fund-A, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 14		2
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		19		27
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,013		547
Gross Additions		15		2
Gross Reductions		52		50
Ending balance		$ 976		499
Investment, Identifier [Axis]: EPIC Y-Grade Services, LP, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.96%	[2],[4]		10.70%	[1],[7]
Spread		6%	[2],[4]		6%	[1],[7]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.95%	[3],[4],[9]		11.73%	[5],[7]
Spread		8%	[3],[4],[9]		7%	[5],[7]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.95%	[3],[4],[9]		11.73%	[5],[7]
Spread		8%	[3],[4],[9]		7%	[5],[7]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.95%	[3],[4],[9]		11.73%	[5],[7]
Spread		8%	[3],[4],[9]		7%	[5],[7]
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		7,603
Gross Additions		0
Gross Reductions		0
Ending balance				7,603
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,558
Gross Additions		0
Gross Reductions		$ 0
Ending balance				1,558
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6%	[4],[9],[11]		6%	[6],[7],[8]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		(9)
Gross Additions		1
Gross Reductions		$ 0
Ending balance				(8)
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%			12%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		573
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		18,594
Gross Additions		10
Gross Reductions		$ 0
Ending balance				18,604
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		9%			9%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		144
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		6,294
Gross Additions		1
Gross Reductions		$ 11
Ending balance				6,284
Investment, Identifier [Axis]: Emerald Technologies Acquisition Co, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.97%	[2],[4],[9]		10.67%	[1],[6],[7]
Spread		6.25%	[2],[4],[9]		6.25%	[1],[6],[7]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund IX, L.P.)
Schedule of Investments [Line Items]
Total Rate	[23],[34],[35],[36]				0.10%
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII Co-Investors, L.P.)
Schedule of Investments [Line Items]
Total Rate	[23],[34],[35],[36]				0.38%
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII, L.P.)
Schedule of Investments [Line Items]
Total Rate	[23],[34],[35],[36]				0.14%
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund X, L.P.)
Schedule of Investments [Line Items]
Total Rate	[23],[34],[35],[36]				0.15%
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund II, L.P.)
Schedule of Investments [Line Items]
Total Rate	[34],[35],[36]				0.84%
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund III, L.P.)
Schedule of Investments [Line Items]
Total Rate	[23],[34],[35],[36]				0.25%
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.43%	[3],[4],[9]		11.68%	[5],[6],[7]
Spread		6.50%	[3],[4],[9]		6.50%	[5],[6],[7]
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.43%	[3],[4],[9]		10.92%	[5],[6],[7]
Spread		6.50%	[3],[4],[9]		6.50%	[5],[6],[7]
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.73%	[3],[4],[9],[22]		10.67%	[5],[7],[24]
Spread		7%	[3],[4],[9],[22]		7%	[5],[7],[24]
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.73%	[3],[4],[9],[22]		10.67%	[5],[7],[24]
Spread		7%	[3],[4],[9],[22]		7%	[5],[7],[24]
Investment, Identifier [Axis]: Flame King Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		3,610		0
Amount of Interest, Fees or Dividends Credited to Income		538		280
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		17,580		10,400
Gross Additions		3,610		0
Gross Reductions		0		0
Ending balance		$ 21,190		$ 10,400
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.25%	[4]	7.50%	10.75%	[7]
Spread		6.50%	[4]	6.50%	6.50%	[7]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(4)		0
Amount of Interest, Fees or Dividends Credited to Income		215		139
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		7,600		6,324
Gross Additions		4		1,204
Gross Reductions		4		0
Ending balance		$ 7,600		$ 7,528
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.75%	[4]	12%	13.25%	[7]
Spread		9%	[4]	11%	9%	[7]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(11)		0
Amount of Interest, Fees or Dividends Credited to Income		730		647
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		21,200		20,996
Gross Additions		11		10
Gross Reductions		11		0
Ending balance		$ 21,200		21,006
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.55%	[3],[4],[9]		11.21%	[5],[6],[7]
Spread		7.50%	[3],[4],[9]		7.50%	[5],[6],[7]
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.55%	[3],[4],[9]		12.19%	[5],[6],[7]
Spread		7.50%	[3],[4],[9]		7.50%	[5],[6],[7]
Investment, Identifier [Axis]: Freeport Financial SBIC Fund LP, LP Interests (Freeport Financial SBIC Fund LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		0		2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		3,483		6,078
Gross Additions		0		0
Gross Reductions		0		1,493
Ending balance		3,483		4,585
Investment, Identifier [Axis]: Freeport Financial SBIC Fund LP, LP Interests (Freeport First Lien Loan Fund III LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		134		108
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		5,848		7,231
Gross Additions		0		0
Gross Reductions		536		0
Ending balance		$ 5,312		7,231
Investment, Identifier [Axis]: Fuse, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%	[2]		12%	[1]
Investment, Identifier [Axis]: GFG Group, LLC., Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		450		0
Amount of Interest, Fees or Dividends Credited to Income		39		251
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		7,140		6,990
Gross Additions		450		0
Gross Reductions		0		1
Ending balance		$ 7,590		$ 6,989
Investment, Identifier [Axis]: GFG Group, LLC., Secured Debt
Schedule of Investments [Line Items]
Total Rate		9%		12%	9%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(6)		(6)
Amount of Interest, Fees or Dividends Credited to Income		261		383
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		11,345		12,545
Gross Additions		6		6
Gross Reductions		6		6
Ending balance		11,345		12,545
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		42		1,217
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		44,440		46,190
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		$ 44,440		$ 46,190
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				8.23%
Spread				8%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				(11)
Amount of Interest, Fees or Dividends Credited to Income				803
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				38,885
Gross Additions				11
Gross Reductions				11
Ending balance				38,885
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.66%			10.12%
Spread		6%			6%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		28
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		670
Gross Additions		295
Gross Reductions		$ 0
Ending balance				965
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.66%			12.12%
Spread		8%			8%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(12)
Amount of Interest, Fees or Dividends Credited to Income		1,280
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		40,493
Gross Additions		12
Gross Reductions		12
Ending balance		$ 40,493
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.46%	[3],[4]		11.20%	[5],[7]
Spread		6.50%	[3],[4]		6.50%	[5],[7]
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.46%	[3],[4]		11.24%	[5],[7]
Spread		6.50%	[3],[4]		6.50%	[5],[7]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.99%	[3],[4],[9],[37]		10.42%	[5],[6],[7]
Spread		6%	[3],[4],[9],[37]		6%	[5],[6],[7]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[3],[4],[9]	11.11%
Spread		6%	[3],[4],[9]		6%	[5],[6],[7],[8]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.58%	[3],[4],[9]		10.73%	[5],[6],[7]
Spread		6%	[3],[4],[9]		6%	[5],[6],[7]
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		8,480		(4,580)
Amount of Interest, Fees or Dividends Credited to Income		1,567		180
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		50,890		49,700
Gross Additions		8,480		0
Gross Reductions		0		4,580
Ending balance		$ 59,370		$ 45,120
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				10.50%
Spread				8.50%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				(5)
Amount of Interest, Fees or Dividends Credited to Income				520
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				21,598
Gross Additions				5
Gross Reductions				5
Ending balance				21,598
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		8.50%	[4],[9],[11]		8.50%	[6],[7],[8]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.50%	[4],[9],[38]		11.50%	[6],[7]
Spread		8.50%	[4],[9],[38]		8.50%	[6],[7]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(24)
Amount of Interest, Fees or Dividends Credited to Income		1,852
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		64,078
Gross Additions		24
Gross Reductions		824
Ending balance				63,278
Investment, Identifier [Axis]: Garreco, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		(220)		70
Amount of Interest, Fees or Dividends Credited to Income		12		40
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,800		2,270
Gross Additions		0		70
Gross Reductions		220		0
Ending balance		$ 1,580		$ 2,340
Investment, Identifier [Axis]: Garreco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%	[4],[39]	9%	9.50%	[7],[40]
Spread		10%	[4],[39]	8%	8%	[7],[40]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		112		94
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		3,826		4,196
Gross Additions		0		0
Gross Reductions		277		0
Ending balance		$ 3,549		4,196
Investment, Identifier [Axis]: GeoStabilization International (GSI), Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.17%	[2],[9]		9.44%	[1],[6]
Spread		5.25%	[2],[9]		5.25%	[1],[6]
Investment, Identifier [Axis]: Gulf Manufacturing, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		580		(350)
Amount of Interest, Fees or Dividends Credited to Income		718		195
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		6,790		5,640
Gross Additions		580		0
Gross Reductions		0		350
Ending balance		7,370		$ 5,290
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		0
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		3,780
Gross Additions		0
Gross Reductions		0
Ending balance		$ 3,780
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				10.50%
Spread		9.50%	[4],[11]		9.50%	[7],[8]
PIK Rate				5.25%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		0		3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0		257
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		$ 0		$ 257
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%		12.50%	12.50%
PIK Rate				6.25%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		(1,717)
Amount of Interest, Fees or Dividends Credited to Income		75		212
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		2,284		9,717
Gross Additions		0		0
Gross Reductions		0		1,717
Ending balance		$ 2,284		8,000
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		14.34%	[3],[4],[9]		14.34%	[5],[6],[7]
Spread		9.50%	[3],[4],[9]		9.50%	[5],[6],[7]
PIK Rate		14.34%	[3],[4],[9]		2%	[5],[6],[7]
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.34%	[3],[4],[9]		14.34%	[5],[6],[7]
Spread		9.50%	[3],[4],[9]		9.50%	[5],[6],[7]
PIK Rate		14.34%	[3],[4],[9]		2%	[5],[6],[7]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.50%	[3],[4],[9],[11]		6.50%	[5],[6],[7],[8]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 2
Schedule of Investments [Line Items]
Spread		6.50%	[3],[4],[9],[11]		6.50%	[5],[6],[7],[8]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.12%	[3],[4],[9]		10.62%	[5],[6],[7]
Spread		6.50%	[3],[4],[9]		6.50%	[5],[6],[7]
Investment, Identifier [Axis]: HOWLCO LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.92%	[2],[4],[41],[42]		10.69%	[1],[7],[35],[43]
Spread		6%	[2],[4],[41],[42]		6%	[1],[7],[35],[43]
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (423 COR, LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		117
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,400
Gross Additions		0
Gross Reductions		0
Ending balance		1,400
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (HPEP 3, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		698
Amount of Unrealized Gain/(Loss)		113		(280)
Amount of Interest, Fees or Dividends Credited to Income		0		2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		4,331		4,712
Gross Additions		113		0
Gross Reductions		508		28
Ending balance		3,936		4,684
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (HPEP 4, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		2,332
Gross Additions		0
Gross Reductions		0
Ending balance		2,332
Investment, Identifier [Axis]: Harrison Hydra-Gen, Ltd., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		210		0
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		3,280		3,530
Gross Additions		210		0
Gross Reductions		0		0
Ending balance		3,490		3,530
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		65		579
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		17,460		14,680
Gross Additions		0		1,890
Gross Reductions		0		0
Ending balance		17,460		16,570
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		0		1,990
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		920		771
Gross Additions		0		99
Gross Reductions		0		0
Ending balance		$ 920		$ 870
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.75%	[4]	7%	10.13%	[7]
Spread		6%	[4]	6%	6%	[7]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		90		47
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		3,185		2,585
Gross Additions		815		0
Gross Reductions		0		0
Ending balance		$ 4,000		$ 2,585
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10%		8%	9%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(10)		(8)
Amount of Interest, Fees or Dividends Credited to Income		893		702
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		37,800		34,800
Gross Additions		10		8
Gross Reductions		10		8
Ending balance		$ 37,800		34,800
Investment, Identifier [Axis]: Heartland Dental, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.34%	[3],[4]		10.88%	[5],[7]
Spread		6.50%	[3],[4]		6.50%	[5],[7]
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		600		(240)
Amount of Interest, Fees or Dividends Credited to Income		2		1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		2,400		3,210
Gross Additions		600		0
Gross Reductions		0		241
Ending balance		$ 3,000		$ 2,969
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Unsecured Convertible Debt
Schedule of Investments [Line Items]
Total Rate		8%		8%	8%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(170)		(90)
Amount of Interest, Fees or Dividends Credited to Income		60		60
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		3,000		2,960
Gross Additions		0		0
Gross Reductions		170		90
Ending balance		$ 2,830		$ 2,870
Investment, Identifier [Axis]: Hybrid Promotions, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.10%	[3],[4],[9]		12.07%	[5],[6]
Spread		8.25%	[3],[4],[9]		8.25%	[5],[6]
Investment, Identifier [Axis]: I-45 SLF LLC, Member Units (Fully diluted 20.0%; 21.75% profits interest)
Schedule of Investments [Line Items]
Total Rate	[23],[34],[35]				20%
Diluted, percentage		20%	[41],[44]		20%	[34],[35]
Profits, percentage		21.75%	[41],[44]		21.75%	[34],[35]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		528
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		11,758
Gross Additions		1,200
Gross Reductions		0
Ending balance		$ 12,958
Investment, Identifier [Axis]: I-45 SLF LLC, Member Units (Fully diluted 20.0%; 24.40% profits interest)
Schedule of Investments [Line Items]
Diluted, percentage				20%
Profits, percentage				24.40%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				52
Amount of Interest, Fees or Dividends Credited to Income				516
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				14,387
Gross Additions				52
Gross Reductions				0
Ending balance				14,439
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[1],[6],[7],[45]				10.17%
Spread	[1],[6],[7],[45]				5.75%
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[1],[6],[7]				10.17%
Spread		5.75%	[2],[4],[9],[11]		5.75%	[1],[6],[7]
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[2],[4],[9]	10.59%
Spread	[2],[4],[9]	5.75%
Investment, Identifier [Axis]: INW Manufacturing, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.48%	[2],[4]		10.48%	[1],[7]
Spread		5.75%	[2],[4]		5.75%	[1],[7]
Investment, Identifier [Axis]: Implus Footcare, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.99%	[3],[4],[9]		13.98%	[5],[7]
Spread		7.75%	[3],[4],[9]		7.75%	[5],[7]
PIK Rate		1.50%	[3],[4],[9]		1.50%	[5],[7]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Preferred Stock (non-voting) 1
Schedule of Investments [Line Items]
Total Rate		6%	[3]		6%	[5]
PIK Rate		6%	[3]		6%	[5]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.25%	[3],[4]		13%	[5],[7],[46]
Spread		7.50%	[3],[4]		5.50%	[5],[7],[46]
PIK Rate		15.25%	[3],[4]		13%	[5],[7],[46]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		6%	[3],[12]		6%	[5],[13]
PIK Rate		6%	[3],[12]		6%	[5],[13]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		14.95%	[3],[9]		14.42%	[5],[6]
Spread		10%	[3],[9]		10%	[5],[6]
PIK Rate		14.95%	[3],[9]		14.42%	[5],[6]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[3],[9]	14.66%
Spread	[3],[9]	10%
PIK Rate	[3],[9]	14.66%
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Total Rate		10%	[3],[21],[22]		10%	[5],[23],[24]
PIK Rate		10%	[3],[21],[22]		10%	[5],[23],[24]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Total Rate		20%	[3],[21],[22]		20%	[5],[23],[24]
PIK Rate		20%	[3],[21],[22]		20%	[5],[23],[24]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.50%	[3],[4]		11.50%	[5],[7]
Spread		6.75%	[3],[4]		6.75%	[5],[7]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.50%	[3],[4]		11.50%	[5],[7]
Spread		6.75%	[3],[4]		6.75%	[5],[7]
Investment, Identifier [Axis]: Infinity X1 Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		4,000
Gross Reductions		0
Ending balance		$ 4,000
Investment, Identifier [Axis]: Infinity X1 Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		183
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		17,823
Gross Reductions		0
Ending balance		$ 17,823
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		5.50%	[3],[4],[11]		5.50%	[5],[7],[8]
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.23%	[3],[4]		10.23%	[5],[7]
Spread		5.50%	[3],[4]		5.50%	[5],[7]
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		14.76%	[3]		14.22%	[5],[47]
Spread		10%	[3]		10%	[5],[47]
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.63%	[3],[4],[12]		12.07%	[5],[7],[13]
Spread		7%	[3],[4],[12]		7%	[5],[7],[13]
PIK Rate		11.63%	[3],[4],[12]		1%	[5],[7],[13]
Investment, Identifier [Axis]: Intermedia Holdings, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.84%	[2],[4]		10.38%	[1],[7]
Spread		6%	[2],[4]		6%	[1],[7]
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.32%	[3],[4],[48]		10.14%	[5],[7]
Spread		6.50%	[3],[4],[48]		6.50%	[5],[7]
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.23%	[3],[4]		10.17%	[5],[7]
Spread		6.50%	[3],[4]		6.50%	[5],[7]
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,798		1,798
Gross Additions		958		0
Gross Reductions		0		0
Ending balance		$ 2,756		$ 1,798
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.50%		12.50%	12.50%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		151		102
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		4,500		3,170
Gross Additions		2		1
Gross Reductions		0		0
Ending balance		$ 4,502		$ 3,171
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.50%		12.50%	12.50%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		105		146
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		3,130		4,557
Gross Additions		2		2
Gross Reductions		0		0
Ending balance		$ 3,132		$ 4,559
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		13.50%		12.50%	12.50%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		294		915
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		8,944		28,749
Gross Additions		0		10
Gross Reductions		0		0
Ending balance		$ 8,944		28,759
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		13.50%			12.50%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		658
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		19,559
Gross Additions		9
Gross Reductions		0
Ending balance		$ 19,568
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 5
Schedule of Investments [Line Items]
Total Rate		13.50%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		489
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		10,836
Gross Reductions		0
Ending balance		$ 10,836
Investment, Identifier [Axis]: Isagenix International, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		9.93%	[2],[4],[12]		9.93%	[1],[7],[13]
Spread		7.75%	[2],[4],[12]		7.75%	[1],[7],[13]
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6%	[3],[4],[11]		6%	[5],[7],[8]
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.73%	[3],[4]		10.73%	[5],[7]
Spread		6%	[3],[4]		6%	[5],[7]
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Preferred Equity
Schedule of Investments [Line Items]
Total Rate	[5],[23]				12%
PIK Rate	[5],[23]				12%
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.23%	[3],[4]		12.23%	[5],[7]
Spread		7.50%	[3],[4]		7.50%	[5],[7]
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.23%	[3],[4]		12.23%	[5],[7]
Spread		7.50%	[3],[4]		7.50%	[5],[7]
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		(120)		2,700
Amount of Interest, Fees or Dividends Credited to Income		129		537
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		14,970		12,420
Gross Additions		0		2,700
Gross Reductions		120		0
Ending balance		$ 14,850		$ 15,120
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				10%
Spread				6.75%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				(3)
Amount of Interest, Fees or Dividends Credited to Income				64
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				2,550
Gross Additions				3
Gross Reductions				103
Ending balance				2,450
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.75%	[11]		6.75%	[8]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.50%	[4]		13.75%	[7]
Spread		6.75%	[4]		6.75%	[7]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(2)
Amount of Interest, Fees or Dividends Credited to Income		90
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		2,450
Gross Additions		2
Gross Reductions		2
Ending balance		$ 2,450
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		23.04%	[2],[9]		18%	[1]
Spread	[2],[9]	18%
PIK Rate	[2],[9]	23.04%
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		21.08%	[2],[9],[12]		19.75%	[1],[13]
Spread	[2],[9],[12]	16%
PIK Rate		21.08%	[2],[9],[12]		19.75%	[1],[13]
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		1,010		0
Amount of Interest, Fees or Dividends Credited to Income		71		318
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		5,540		3,150
Gross Additions		1,010		0
Gross Reductions		0		0
Ending balance		$ 6,550		$ 3,150
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				13%
Spread				11.50%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				382
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				11,344
Gross Additions				6
Gross Reductions				0
Ending balance				11,350
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		11.50%	[4],[11]		11.50%	[7],[8]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(1)
Amount of Interest, Fees or Dividends Credited to Income		3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		1
Gross Reductions		1
Ending balance		$ 0
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		16.25%	[4]		15.63%	[7]
Spread		11.50%	[4]		11.50%	[7]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(5)
Amount of Interest, Fees or Dividends Credited to Income		407
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		9,999
Gross Additions		5
Gross Reductions		5
Ending balance		9,999
Investment, Identifier [Axis]: JorVet Holdings, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				0
Gross Additions				10,741
Gross Reductions				0
Ending balance				$ 10,741
Investment, Identifier [Axis]: JorVet Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		221
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		10,741
Gross Additions		0
Gross Reductions		0
Ending balance		$ 10,741
Investment, Identifier [Axis]: JorVet Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%	12%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		782		257
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		25,432		0
Gross Additions		13		25,394
Gross Reductions		0		0
Ending balance		25,445		25,394
Investment, Identifier [Axis]: KBK Industries, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		(3,590)		310
Amount of Interest, Fees or Dividends Credited to Income		6,134		211
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		15,570		13,620
Gross Additions		0		310
Gross Reductions		3,590		0
Ending balance		$ 11,980		13,930
Investment, Identifier [Axis]: KBK Industries, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		56
Amount of Interest, Fees or Dividends Credited to Income		184
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		6,000
Gross Reductions		250
Ending balance		$ 5,750
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%	[3],[4]		12%	[5],[7]
Spread		7.25%	[3],[4]		7.25%	[5],[7]
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%	[3],[4]		12%	[5],[7]
Spread		7.25%	[3],[4]		7.25%	[5],[7]
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(70)
Amount of Interest, Fees or Dividends Credited to Income		29
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		2,850
Gross Additions		0
Gross Reductions		70
Ending balance		2,780
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				(70)
Amount of Interest, Fees or Dividends Credited to Income				0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				12,310
Gross Additions				0
Gross Reductions				70
Ending balance				12,240
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				26
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				2,460
Gross Additions				0
Gross Reductions				0
Ending balance				$ 2,460
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		7,220
Gross Additions		0
Gross Reductions		0
Ending balance		$ 7,220
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%		11.50%	11.50%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		780		599
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		20,374		20,324
Gross Additions		192		12
Gross Reductions		0		0
Ending balance		$ 20,566		$ 20,336
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		9%		9%	9%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		88		88
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		3,842		3,876
Gross Additions		0		0
Gross Reductions		9		8
Ending balance		$ 3,833		3,868
Investment, Identifier [Axis]: Kore Wireless Group Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.08%	[2],[9]		10.08%	[1],[6]
Spread		5.50%	[2],[9]		5.50%	[1],[6]
Investment, Identifier [Axis]: L.F. Manufacturing Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				224
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				2,560
Gross Additions				0
Gross Reductions				0
Ending balance				2,560
Investment, Identifier [Axis]: L.F. Manufacturing Holdings, LLC, Preferred Member Units (non-voting)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				4
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				107
Gross Additions				4
Gross Reductions				0
Ending balance				$ 111
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.11%	[3],[4],[9]		11.21%	[5],[6],[7]
Spread		7.25%	[3],[4],[9]		7.25%	[5],[6],[7]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.13%	[3],[4],[9],[49]		11.67%	[5],[6],[7]
Spread		7.25%	[3],[4],[9],[49]		7.25%	[5],[6],[7]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.09%	[3],[4],[9]		11.67%	[5],[6],[7]
Spread		7.25%	[3],[4],[9]		7.25%	[5],[6],[7]
Investment, Identifier [Axis]: LLFlex, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.75%	[3],[4]		12.74%	[5],[7]
Spread		9%	[3],[4]		9%	[5],[7]
Investment, Identifier [Axis]: Lightbox Holdings, L.P., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.16%	[2]		9.73%	[1]
Spread		5%	[2]		5%	[1]
Investment, Identifier [Axis]: Logix Acquisition Company, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.59%	[3],[4]		10.13%	[5],[7]
Spread		5.75%	[3],[4]		5.75%	[5],[7]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.72%	[2],[4],[9],[10]		10.42%	[1],[6],[7]
Spread		6%	[2],[4],[9],[10]		6%	[1],[6],[7]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.72%	[2],[4],[9]		10.42%	[1],[6],[7]
Spread		6%	[2],[4],[9]		6%	[1],[6],[7]
Investment, Identifier [Axis]: MH Corbin Holding LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		0
Investment, Identifier [Axis]: MH Corbin Holding LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: MH Corbin Holding LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13%	[19]	13%	13%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		952		(1,495)
Amount of Interest, Fees or Dividends Credited to Income		196		274
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		4,548		5,934
Gross Additions		952		9
Gross Reductions		116		1,575
Ending balance		5,384		4,368
Investment, Identifier [Axis]: MS Private Loan Fund, LP Interests
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		(58)		0
Amount of Interest, Fees or Dividends Credited to Income		370		72
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		14,833		2,581
Gross Additions		0		5,000
Gross Reductions		58		0
Ending balance		14,775		$ 7,581
Investment, Identifier [Axis]: MS Private Loan Fund, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		6
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		0
Investment, Identifier [Axis]: MS Private Loan Fund, Secured Debt 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		0
Investment, Identifier [Axis]: MS Private Loan Fund, Unsecured Debt
Schedule of Investments [Line Items]
Total Rate				5%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				435
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				63,151
Gross Additions				17,000
Gross Reductions				80,151
Ending balance				0
Investment, Identifier [Axis]: MSC Adviser I, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		9,720		(7,480)
Amount of Interest, Fees or Dividends Credited to Income		3,057		2,277
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		122,930		140,400
Gross Additions		9,720		0
Gross Reductions		0		7,480
Ending balance		132,650		$ 132,920
Investment, Identifier [Axis]: MSC Income Fund, Inc., Common Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		7
Amount of Interest, Fees or Dividends Credited to Income		15
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		753
Gross Additions		7
Gross Reductions		0
Ending balance		$ 760
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.30%	[3],[4]		11.79%	[5],[7],[50]
Spread		7.25%	[3],[4]		7.25%	[5],[7],[50]
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.30%	[3],[4]		11.09%	[5],[7]
Spread		7.25%	[3],[4]		7.25%	[5],[7]
Investment, Identifier [Axis]: Market Force Information, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.75%	[4]	12%	15.13%	[7]
Spread		11%	[4]	11%	11%	[7]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(6,725)		0
Amount of Interest, Fees or Dividends Credited to Income		260		102
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		6,090		3,400
Gross Additions		635		0
Gross Reductions		6,725		0
Ending balance		$ 0		$ 3,400
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%	[12]	12%	12%	[13]
PIK Rate		12%	[12]	12%	12%	[13]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(1,610)		0
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,610		8,936
Gross Additions		0		0
Gross Reductions		1,610		0
Ending balance		0		8,936
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		327
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,537
Gross Additions		0
Gross Reductions		0
Ending balance		$ 1,537
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Preferred Equity
Schedule of Investments [Line Items]
Total Rate		8%	[21]		8%	[23]
Spread	[21]	8%
PIK Rate		8%			8%	[23]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		148
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		6,010
Gross Additions		117
Gross Reductions		0
Ending balance		6,127
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.75%			12.75%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		739
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		23,576
Gross Additions		12
Gross Reductions		0
Ending balance		$ 23,588
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.25%	[3],[4],[9],[11]		6.25%	[5],[6],[7],[8]
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.09%	[3],[4],[9]		9.86%	[5],[6],[7]
Spread		6.25%	[3],[4],[9]		6.25%	[5],[6],[7]
Investment, Identifier [Axis]: Mills Fleet Farm Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.08%	[3],[4]		10.66%	[5],[7]
Spread		6.25%	[3],[4]		6.25%	[5],[7]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[3],[4],[41],[42]	12.11%
Spread		7%	[3],[4],[41],[42]		7%	[5],[7],[8],[35],[43]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.73%	[3],[4],[41],[42]		11.73%	[5],[7],[35],[43]
Spread		7%	[3],[4],[41],[42]		7%	[5],[7],[35],[43]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.73%	[3],[4],[41],[42]		11.73%	[5],[7],[35],[43]
Spread		7%	[3],[4],[41],[42]		7%	[5],[7],[35],[43]
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		2,180		2,220
Amount of Interest, Fees or Dividends Credited to Income		992		568
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		22,830		8,840
Gross Additions		2,180		2,220
Gross Reductions		0		0
Ending balance		25,010		$ 11,060
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				10%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				(1)
Amount of Interest, Fees or Dividends Credited to Income				157
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				6,378
Gross Additions				1
Gross Reductions				281
Ending balance				6,098
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10%			10%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		144
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		5,746
Gross Additions		0
Gross Reductions		0
Ending balance		5,746
Investment, Identifier [Axis]: NAPCO Precast, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		670		(190)
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		11,830		13,560
Gross Additions		670		0
Gross Reductions		0		190
Ending balance		$ 12,500		13,370
Investment, Identifier [Axis]: NBG Acquisition Inc, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.71%	[2],[4],[12]		9.67%	[1],[7]
Spread		5.50%	[2],[4],[12]		5.50%	[1],[7]
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				(150)
Amount of Interest, Fees or Dividends Credited to Income				101
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				6,440
Gross Additions				0
Gross Reductions				150
Ending balance				$ 6,290
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		279
Amount of Interest, Fees or Dividends Credited to Income		13
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		4,615
Gross Additions		278
Gross Reductions		0
Ending balance		4,893
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		11
Amount of Interest, Fees or Dividends Credited to Income		(2)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		175
Gross Additions		12
Gross Reductions		0
Ending balance		$ 187
Investment, Identifier [Axis]: NRP Jones, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%	12%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		62		62
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		2,080		2,080
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		$ 2,080		2,080
Investment, Identifier [Axis]: NTM Acquisition Corp., Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.30%	[2],[4],[9]		9.50%	[1],[7]
Spread		7.25%	[2],[4],[9]		6.25%	[1],[7]
PIK Rate		1%	[2],[4],[9]		1%	[1],[7]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.85%	[3],[4],[9],[51]		10.85%	[5],[6],[7],[52]
Spread		8%	[3],[4],[9],[51]		8%	[5],[6],[7],[52]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.87%	[3],[4],[9]		12.56%	[5],[6],[7]
Spread		8%	[3],[4],[9]		8%	[5],[6],[7]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		20%	[3]		20%	[5]
PIK Rate		20%	[3]		20%	[5]
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC (NVS), Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		3,520		0
Amount of Interest, Fees or Dividends Credited to Income		125		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		7,700		7,700
Gross Additions		3,520		0
Gross Reductions		0		0
Ending balance		$ 11,220		$ 7,700
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC (NVS), Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				12%
Spread		7%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		2		541
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0		10,412
Gross Additions		0		6
Gross Reductions		0		0
Ending balance		$ 0		$ 10,418
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC (NVS), Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%		12%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(10)		0
Amount of Interest, Fees or Dividends Credited to Income		613		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		20,094		4,829
Gross Additions		10		1,408
Gross Reductions		10		0
Ending balance		$ 20,094		6,237
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC (NVS), Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(5)
Amount of Interest, Fees or Dividends Credited to Income		320
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		10,500
Gross Additions		5
Gross Reductions		5
Ending balance		$ 10,500
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%
Spread	[7],[8]				7%
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%			12%
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate					12%
Investment, Identifier [Axis]: NexRev LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		1,880		0
Amount of Interest, Fees or Dividends Credited to Income		131		20
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,110		2,690
Gross Additions		1,880		0
Gross Reductions		0		0
Ending balance		2,990		$ 2,690
Investment, Identifier [Axis]: NexRev LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				11%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				850
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				14,045
Gross Additions				10
Gross Reductions				218
Ending balance				13,837
Investment, Identifier [Axis]: NexRev LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: NexRev LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11%			11%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		1,000
Amount of Interest, Fees or Dividends Credited to Income		320
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		8,477
Gross Additions		1,022
Gross Reductions		629
Ending balance		$ 8,870
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.25%	[3],[4],[11]		6.25%	[5],[7],[8]
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Spread		6.25%	[3],[4],[11]		6.25%	[5],[7],[8]
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11%	[3],[4]		9.99%	[5],[7]
Spread		6.25%	[3],[4]		6.25%	[5],[7]
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				13,500
Gross Additions				0
Gross Reductions				0
Ending balance				$ 13,500
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(410)
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		8,040
Gross Additions		0
Gross Reductions		410
Ending balance		7,630
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		5,150
Gross Additions		0
Gross Reductions		0
Ending balance		$ 5,150
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.25%	[4]	7.50%	10.63%	[7]
Spread		6.50%	[4]	6.50%	6.50%	[7]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		122		48
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		4,399		1,720
Gross Additions		0		1,200
Gross Reductions		0		0
Ending balance		$ 4,399		$ 2,920
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%		12%	12%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		556		504
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		18,414		17,240
Gross Additions		3		0
Gross Reductions		0		0
Ending balance		18,417		17,240
Investment, Identifier [Axis]: OMi Topco, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		2,290		0
Amount of Interest, Fees or Dividends Credited to Income		675		479
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		22,810		20,210
Gross Additions		2,290		0
Gross Reductions		0		0
Ending balance		$ 25,100		$ 20,210
Investment, Identifier [Axis]: OMi Topco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%	12%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(13)		(14)
Amount of Interest, Fees or Dividends Credited to Income		485		554
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		15,750		18,000
Gross Additions		13		14
Gross Reductions		763		514
Ending balance		$ 15,000		$ 17,500
Investment, Identifier [Axis]: OVG Business Services, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.89%	[3],[4]		10.64%	[5],[7]
Spread		6.25%	[3],[4]		6.25%	[5],[7]
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Preferred Stock
Schedule of Investments [Line Items]
Total Rate		7%			7%
PIK Rate		7%			7%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%	[12]	12%	12%	[13]
PIK Rate		12%	[12]	12%	12%	[13]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(6)		0
Amount of Interest, Fees or Dividends Credited to Income		0		29
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		569		935
Gross Additions		0		29
Gross Reductions		6		0
Ending balance		$ 563		$ 964
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%	[12]	12%	12%	[13]
PIK Rate		12%	[12]	12%	12%	[13]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(6)		0
Amount of Interest, Fees or Dividends Credited to Income		0		29
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		580		954
Gross Additions		0		29
Gross Reductions		6		0
Ending balance		$ 574		$ 983
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12%	[12]	12%	12%	[13]
PIK Rate		12%	[12]	12%	12%	[13]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(14)		0
Amount of Interest, Fees or Dividends Credited to Income		0		62
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,249		2,055
Gross Additions		0		61
Gross Reductions		13		0
Ending balance		$ 1,236		$ 2,116
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		12%	[12]	12%	12%	[13]
PIK Rate		12%	[12]	12%	12%	[13]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(28)		0
Amount of Interest, Fees or Dividends Credited to Income		0		129
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		2,606		4,286
Gross Additions		0		129
Gross Reductions		29		0
Ending balance		$ 2,577		$ 4,415
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Unsecured Debt
Schedule of Investments [Line Items]
Total Rate		10%	[12]	10%	10%	[13]
PIK Rate		10%	[12]	10%	10%	[13]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		0		5
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		305		191
Gross Additions		0		6
Gross Reductions		0		0
Ending balance		305		197
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		0
Investment, Identifier [Axis]: Oneliance, LLC, Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,056		1,056
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		$ 1,056		$ 1,056
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12%
Spread				11%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				171
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				5,547
Gross Additions				3
Gross Reductions				0
Ending balance				5,550
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		11%			11%	[7],[8]
PIK Rate	[4],[11]	11%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.75%	[4]		15.13%	[7]
Spread		11%			11%	[7]
PIK Rate	[4]	11%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		219
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		5,559
Gross Additions		3
Gross Reductions		80
Ending balance		5,482
Investment, Identifier [Axis]: Orttech Holdings, LLC, Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		1,750		0
Amount of Interest, Fees or Dividends Credited to Income		269		193
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		11,750		10,000
Gross Additions		1,750		0
Gross Reductions		0		0
Ending balance		$ 13,500		$ 10,000
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12%
Spread				11%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				743
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				24,150
Gross Additions				13
Gross Reductions				0
Ending balance				24,163
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		11%	[4],[11]		11%	[7],[8]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.75%	[4]		15.13%	[7]
Spread		11%	[4]		11%	[7]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		924
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		23,429
Gross Additions		17
Gross Reductions		800
Ending balance		$ 22,646
Investment, Identifier [Axis]: Ospemifene Royalty Sub LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.50%	[3],[12]		11.50%	[5],[13]
Investment, Identifier [Axis]: Other, Affiliate Investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0		0
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		0		0
Investment, Identifier [Axis]: Other, Control Investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		0
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				560
Amount of Interest, Fees or Dividends Credited to Income				104
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				14,360
Gross Additions				560
Gross Reductions				0
Ending balance				$ 14,920
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		104
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		18,950
Gross Additions		0
Gross Reductions		0
Ending balance		18,950
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(68)
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		238
Gross Additions		0
Gross Reductions		68
Ending balance		$ 170
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				7.50%
Spread		7%	[4],[11]	7%	7%	[7],[8]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		0		36
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0		726
Gross Additions		0		1,257
Gross Reductions		0		0
Ending balance		$ 0		$ 1,983
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.38%	[4]	7.50%	10.25%	[7]
Spread		7%	[4]	7%	7%	[7]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(13)		0
Amount of Interest, Fees or Dividends Credited to Income		629		219
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		21,655		11,655
Gross Additions		13		0
Gross Reductions		13		0
Ending balance		$ 21,655		11,655
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[4],[41]	14.25%
Spread		6.25%	[4],[41]		7.25%	[5],[6],[7],[8],[35]
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.32%	[4],[9],[41]		11.80%	[5],[6],[7],[35]
Spread		7.25%	[4],[9],[41]		7.25%	[5],[6],[7],[35]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.70%	[3],[4],[9]		10.26%	[5],[6],[7]
Spread		5.75%	[3],[4],[9]		5.75%	[5],[6],[7]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.78%	[3],[4],[9]		9.96%	[5],[6],[7],[53]
Spread		5.75%	[3],[4],[9]		5.75%	[5],[6],[7],[53]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.48%	[3],[4],[9]		9.81%	[5],[6],[7]
Spread		5.75%	[3],[4],[9]		5.75%	[5],[6],[7]
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				8,080
Amount of Interest, Fees or Dividends Credited to Income				1,756
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				26,970
Gross Additions				8,080
Gross Reductions				0
Ending balance				$ 35,050
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		280
Amount of Interest, Fees or Dividends Credited to Income		2,879
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		43,260
Gross Additions		280
Gross Reductions		0
Ending balance		$ 43,540
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				(18)
Amount of Interest, Fees or Dividends Credited to Income				1,004
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				32,674
Gross Additions				1,518
Gross Reductions				18
Ending balance				34,174
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		5
Amount of Interest, Fees or Dividends Credited to Income		29
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		3,500
Gross Reductions		0
Ending balance		$ 3,500
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		38
Amount of Interest, Fees or Dividends Credited to Income		142
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		11,500
Gross Reductions		0
Ending balance		$ 11,500
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12%			12%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(20)
Amount of Interest, Fees or Dividends Credited to Income		868
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		28,681
Gross Additions		20
Gross Reductions		1,020
Ending balance		27,681
Investment, Identifier [Axis]: Principle Environmental, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		(90)		0
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		590		710
Gross Additions		0		0
Gross Reductions		90		0
Ending balance		500		710
Investment, Identifier [Axis]: Principle Environmental, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		(1,940)		0
Amount of Interest, Fees or Dividends Credited to Income		286		219
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		12,420		11,160
Gross Additions		0		0
Gross Reductions		1,940		0
Ending balance		$ 10,480		$ 11,160
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13%
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				13%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		0		51
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0		1,465
Gross Additions		0		3
Gross Reductions		0		500
Ending balance		$ 0		$ 968
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%		13%	13%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		198		198
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		5,806		5,808
Gross Additions		6		6
Gross Reductions		0		0
Ending balance		$ 5,812		5,814
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.25%	[3],[4],[11]		6.25%	[5],[7],[8]
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.89%	[3],[4]		10.64%	[5],[7]
Spread		6.25%	[3],[4]		6.25%	[5],[7]
Investment, Identifier [Axis]: Quality Lease Service, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		0		(29)
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		525		2,149
Gross Additions		0		0
Gross Reductions		0		679
Ending balance		$ 525		1,470
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[3],[4],[9]	11.47%
Spread		6.75%	[3],[4],[9]		6.75%	[5],[6],[7],[8]
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.63%	[3],[4],[9]		10.56%	[5],[6],[7]
Spread		6.75%	[3],[4],[9]		6.75%	[5],[6],[7]
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.52%	[3],[4],[9]		12.02%	[5],[6],[7],[54]
Spread		7.75%	[3],[4],[9]		7.75%	[5],[6],[7],[54]
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.52%	[3],[4],[9]		11.49%	[5],[6],[7]
Spread		7.75%	[3],[4],[9]		7.75%	[5],[6],[7]
Investment, Identifier [Axis]: Research Now Group, Inc. and Survey Sampling International, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.31%	[2],[4]		8.84%	[1],[7]
Spread		5.50%	[2],[4]		5.50%	[1],[7]
Investment, Identifier [Axis]: River Aggregates, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		3,620		3,280
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		3,620		3,280
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		(4,950)		0
Amount of Interest, Fees or Dividends Credited to Income		0		140
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		14,880		11,070
Gross Additions		0		0
Gross Reductions		4,950		0
Ending balance		9,930		$ 11,070
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate				12%
Spread				11%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				1,117
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				35,956
Gross Additions				21
Gross Reductions				0
Ending balance				$ 35,977
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		8
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		(35)
Gross Additions		2
Gross Reductions		0
Ending balance		$ (33)
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%			12.50%	[7]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		1,128
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		35,404
Gross Additions		19
Gross Reductions		225
Ending balance		35,198
Investment, Identifier [Axis]: Rocaceia, LLC (Quality Lease and Rental Holdings, LLC), Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		0
Investment, Identifier [Axis]: Rocaceia, LLC (Quality Lease and Rental Holdings, LLC), Secured Debt
Schedule of Investments [Line Items]
Total Rate				12%	12%	[13],[20],[55]
Amount of Realized Gain/(Loss)		(29,526)		$ (8)
Amount of Unrealized Gain/(Loss)		29,865		0
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0		0
Gross Additions		29,865		0
Gross Reductions		29,865		0
Ending balance		$ 0		0
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[5],[6],[7]				10.97%
Spread		6.50%	[3],[4],[9],[11]		6.50%	[5],[6],[7]
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.35%	[3],[4],[9]		10.32%	[5],[6],[7]
Spread		6.50%	[3],[4],[9]		6.50%	[5],[6],[7]
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.35%	[3],[4],[9]		10.32%	[5],[6],[7]
Spread		6.50%	[3],[4],[9]		6.50%	[5],[6],[7]
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.02%	[3],[4],[9]		13.02%	[5],[6],[7]
Spread		6.25%	[3],[4],[9]		6.25%	[5],[6],[7]
PIK Rate		2%	[3],[4],[9]		2%	[5],[6],[7]
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.02%	[3],[4],[9]		13.02%	[5],[6],[7]
Spread		6.25%	[3],[4],[9]		6.25%	[5],[6],[7]
PIK Rate		2%	[3],[4],[9]		2%	[5],[6],[7]
Investment, Identifier [Axis]: SI East, LLC (Stavig), Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		0		960
Amount of Interest, Fees or Dividends Credited to Income		343		89
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		13,650		11,570
Gross Additions		0		959
Gross Reductions		0		0
Ending balance		13,650		$ 12,529
Investment, Identifier [Axis]: SI East, LLC (Stavig), Secured Debt
Schedule of Investments [Line Items]
Total Rate				10.25%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				(18)
Amount of Interest, Fees or Dividends Credited to Income				2,048
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				65,850
Gross Additions				18
Gross Reductions				325
Ending balance				65,543
Investment, Identifier [Axis]: SI East, LLC (Stavig), Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		7
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: SI East, LLC (Stavig), Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		9.50%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(33)
Amount of Interest, Fees or Dividends Credited to Income		2,144
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		89,786
Gross Additions		33
Gross Reductions		5,283
Ending balance		$ 84,536
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		9.50%			9.50%
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.21%	[3],[4]		11.01%	[5],[7]
Spread		6.25%	[3],[4]		6.25%	[5],[7]
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.21%	[3],[4]		11.01%	[5],[7]
Spread		6.25%	[3],[4]		6.25%	[5],[7]
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.21%	[3],[4]		11.01%	[5],[7]
Spread		6.25%	[3],[4]		6.25%	[5],[7]
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		7.50%	[3],[4],[9],[11]		7.50%	[5],[6],[7],[8]
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.23%	[3],[4],[9]		11.06%	[5],[6],[7]
Spread		7.50%	[3],[4],[9]		7.50%	[5],[6],[7]
Investment, Identifier [Axis]: Savers, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.34%	[2],[4],[9]		10.34%	[1],[6],[7]
Spread		5.50%	[2],[4],[9]		5.50%	[1],[6],[7]
Investment, Identifier [Axis]: Slick Innovations, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		260		0
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,530		1,510
Gross Additions		260		0
Gross Reductions		0		0
Ending balance		$ 1,790		$ 1,510
Investment, Identifier [Axis]: Slick Innovations, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14%		13%	14%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(9)		(13)
Amount of Interest, Fees or Dividends Credited to Income		492		182
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		13,840		5,320
Gross Additions		9		13
Gross Reductions		249		213
Ending balance		13,600		5,120
Investment, Identifier [Axis]: Slick Innovations, LLC, Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				400
Gross Additions				0
Gross Reductions				0
Ending balance				400
Investment, Identifier [Axis]: Sonic Systems International, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		(50)		(60)
Amount of Interest, Fees or Dividends Credited to Income		11		11
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,280		1,070
Gross Additions		0		0
Gross Reductions		50		60
Ending balance		$ 1,230		$ 1,010
Investment, Identifier [Axis]: Sonic Systems International, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.26%	[3],[4]	8.50%	11.24%	[5],[7]
Spread		7.50%	[3],[4]	7.50%	7.50%	[5],[7]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(17)		0
Amount of Interest, Fees or Dividends Credited to Income		499		267
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		15,769		11,757
Gross Additions		17		12
Gross Reductions		17		0
Ending balance		$ 15,769		11,769
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		5.25%	[3],[4],[11]		5.75%	[5],[7],[8]
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.03%	[3],[4]		9.69%	[5],[7]
Spread		5.25%	[3],[4]		5.75%	[5],[7]
Investment, Identifier [Axis]: Staples Canada ULC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.02%	[3],[4],[41],[42],[56]		11.83%	[5],[7],[35],[43],[57]
Spread		7%	[3],[4],[41],[42],[56]		7%	[5],[7],[35],[43],[57]
Investment, Identifier [Axis]: Stellant Systems, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.54%	[2],[4],[9]		10.05%	[1],[6],[7]
Spread		5.50%	[2],[4],[9]		5.50%	[1],[6],[7]
Investment, Identifier [Axis]: Student Resource Center, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: Student Resource Center, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.69%	[3]		13.27%	[5]
Spread		8.50%	[3]		8.50%	[5]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		108
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		4,556
Gross Additions		0
Gross Reductions		0
Ending balance		4,556
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		470		0
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		4,500		4,500
Gross Additions		470		0
Gross Reductions		0		0
Ending balance		$ 4,970		$ 4,500
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%	12%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		652		656
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		21,378		21,332
Gross Additions		17		12
Gross Reductions		1,000		0
Ending balance		$ 20,395		21,344
Investment, Identifier [Axis]: Tacala Investment Corp., Secured Debt
Schedule of Investments [Line Items]
Total Rate		8.34%	[4],[28],[58]		7.88%	[7],[59],[60]
Spread		3.50%	[4],[28],[58]		3.50%	[7],[59],[60]
Investment, Identifier [Axis]: Team Public Choices, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		9.93%	[2],[4]		9.93%	[1],[7]
Spread		5%	[2],[4]		5%	[1],[7]
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				8,579
Gross Additions				0
Gross Reductions				0
Ending balance				$ 8,579
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(810)
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		7,681
Gross Additions		0
Gross Reductions		810
Ending balance		6,871
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		111
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		333
Gross Reductions		0
Ending balance		$ 333
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				525
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				16,181
Gross Additions				582
Gross Reductions				0
Ending balance				16,763
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%			12%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		55
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,840
Gross Additions		0
Gross Reductions		0
Ending balance		$ 1,840
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%			12%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		459
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		15,120
Gross Additions		3
Gross Reductions		0
Ending balance		15,123
Investment, Identifier [Axis]: Televerde, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		1,191		(731)
Amount of Interest, Fees or Dividends Credited to Income		171		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		5,408		7,280
Gross Additions		1,191		0
Gross Reductions		0		1,808
Ending balance		6,599		5,472
Investment, Identifier [Axis]: Televerde, LLC, Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,794		0
Gross Additions		0		1,794
Gross Reductions		0		0
Ending balance		1,794		1,794
Investment, Identifier [Axis]: The Affiliati Network, LLC, Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		0		590
Amount of Interest, Fees or Dividends Credited to Income		80		122
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		6,400		6,400
Gross Additions		0		590
Gross Reductions		0		0
Ending balance		6,400		$ 6,990
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				7%	13%
Amount of Realized Gain/(Loss)		0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		7		14
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		106		262
Gross Additions		1,321		1,521
Gross Reductions		1,440		720
Ending balance		$ (13)		$ 1,063
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%		11.83%	13%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		293		390
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		9,442		12,834
Gross Additions		7		7
Gross Reductions		200		0
Ending balance		9,249		12,841
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		1,510		0
Amount of Interest, Fees or Dividends Credited to Income		29		29
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		7,800		8,660
Gross Additions		1,506		0
Gross Reductions		0		0
Ending balance		9,306		$ 8,660
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12%
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				(7)
Amount of Interest, Fees or Dividends Credited to Income				269
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				8,712
Gross Additions				8
Gross Reductions				407
Ending balance				8,313
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(1)
Amount of Interest, Fees or Dividends Credited to Income		2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		1
Gross Reductions		1
Ending balance		$ 0
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%			12%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		(5)
Amount of Interest, Fees or Dividends Credited to Income		242
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		7,920
Gross Additions		5
Gross Reductions		5
Ending balance		$ 7,920
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.16%	[2],[4],[9]		11.57%	[1],[6],[7]
Spread		8.40%	[2],[4],[9]		1.25%	[1],[6],[7]
PIK Rate		7.25%	[2],[4],[9]		7.25%	[1],[6],[7]
Investment, Identifier [Axis]: USA DeBusk LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.38%	[3],[4]		9.82%	[5],[7]
Spread		5.75%	[3],[4]		5.75%	[5],[7]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 1
Schedule of Investments [Line Items]
Total Rate		20%	[2],[21]		20%	[1],[23]
PIK Rate		20%	[2],[21]		20%	[1],[23]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		(107)		(87)
Amount of Interest, Fees or Dividends Credited to Income		107		88
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		2,833		2,833
Gross Additions		107		88
Gross Reductions		107		88
Ending balance		$ 2,833		2,833
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 2
Schedule of Investments [Line Items]
Total Rate		20%	[2]		20%	[1]
PIK Rate		20%	[2]		20%	[1]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		385		337
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,991		1,498
Gross Additions		385		337
Gross Reductions		0		0
Ending balance		$ 2,376		$ 1,835
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 3
Schedule of Investments [Line Items]
Total Rate		19%	[2]		19%	[1]
PIK Rate		19%	[2]		19%	[1]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 4
Schedule of Investments [Line Items]
Total Rate		13.50%	[2]		13.50%	[1]
PIK Rate		13.50%	[2]		13.50%	[1]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Convertible Debt
Schedule of Investments [Line Items]
Total Rate		15%	[2]	15%	15%	[1]
PIK Rate		15%	[2]	15%	15%	[1]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		262		(80)
Amount of Interest, Fees or Dividends Credited to Income		91		47
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		4,592		2,375
Gross Additions		353		47
Gross Reductions		0		34
Ending balance		$ 4,945		$ 2,388
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		14.22%	[2],[4],[9]	8.50%	10.76%	[1],[6],[7]
Spread		7.50%	[2],[4],[9]	5.50%	5.50%	[1],[6],[7]
PIK Rate		2%	[2],[4],[9]	2%	2%	[1],[6],[7]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		23		0
Amount of Interest, Fees or Dividends Credited to Income		12		9
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		382		371
Gross Additions		25		2
Gross Reductions		0		0
Ending balance		$ 407		$ 373
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.22%	[2],[4],[9]	8.50%	10.76%	[1],[6],[7]
Spread		7.50%	[2],[4],[9]	5.50%	5.50%	[1],[6],[7]
PIK Rate		2%	[2],[4],[9]	2%	2%	[1],[6],[7]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		102		0
Amount of Interest, Fees or Dividends Credited to Income		62		43
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		1,712		1,852
Gross Additions		112		12
Gross Reductions		3		0
Ending balance		1,821		1,864
Investment, Identifier [Axis]: UnionRock Energy Fund II, LP, LP Interests
Schedule of Investments [Line Items]
Total Rate	[23],[34],[35],[36]				11.11%
Amount of Realized Gain/(Loss)		0		0
Amount of Unrealized Gain/(Loss)		0		(1,885)
Amount of Interest, Fees or Dividends Credited to Income		0		236
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		5,855		6,123
Gross Additions		530		0
Gross Reductions		197		4,470
Ending balance		6,188		1,653
Investment, Identifier [Axis]: Universal Wellhead Services Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: Universal Wellhead Services Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Total Rate		14%	[3],[22]		14%	[5],[24]
PIK Rate		14%	[3],[22]		14%	[5],[24]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		220
Gross Additions		0
Gross Reductions		2
Ending balance		$ 218
Investment, Identifier [Axis]: UserZoom Technologies, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[3],[4],[9]	12.13%
Spread	[3],[4],[9]	7.50%
Investment, Identifier [Axis]: VVS Holdco LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		100		0
Amount of Interest, Fees or Dividends Credited to Income		38		150
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		11,940		11,840
Gross Additions		100		0
Gross Reductions		0		0
Ending balance		$ 12,040		$ 11,840
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				7%
Spread		6%	[4],[11],[22]	6%	6%	[7],[8],[24]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		8		21
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		(21)		1,169
Gross Additions		6		1
Gross Reductions		0		400
Ending balance		$ (15)		$ 770
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.50%	[22]	11.50%	11.50%	[24]
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		889		889
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		30,161		30,100
Gross Additions		15		15
Gross Reductions		0		0
Ending balance		$ 30,176		30,115
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		5.25%	[2],[4],[11]		5.25%	[1],[7],[8]
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.83%	[2],[4]		10.41%	[1],[7]
Spread		6%	[2],[4]		6%	[1],[7]
Investment, Identifier [Axis]: Vida Capital, Inc, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[1]				10.38%
Spread	[1]				6%
Investment, Identifier [Axis]: Vida Capital, Inc, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[2]	10.63%
Spread	[2]	6%
Investment, Identifier [Axis]: Vision Interests, Inc., Series A Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		168		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		3,000		3,000
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		3,000		3,000
Investment, Identifier [Axis]: Volusion, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(2,576)
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		2,576
Gross Reductions		2,576
Ending balance		0
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)				0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				5,989
Gross Additions				0
Gross Reductions				0
Ending balance				$ 5,989
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		0
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		11,446
Gross Reductions		0
Ending balance		11,446
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 3
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10%		11.50%	11.50%	[20]
Amount of Realized Gain/(Loss)				$ 0
Amount of Unrealized Gain/(Loss)				0
Amount of Interest, Fees or Dividends Credited to Income				496
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance				17,434
Gross Additions				0
Gross Reductions				350
Ending balance				$ 17,084
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		2,100
Gross Reductions		0
Ending balance		2,100
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		(3,188)
Amount of Unrealized Gain/(Loss)		1,821
Amount of Interest, Fees or Dividends Credited to Income		166
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		14,914
Gross Additions		0
Gross Reductions		14,914
Ending balance		0
Investment, Identifier [Axis]: Volusion, LLC, Unsecured Convertible Debt
Schedule of Investments [Line Items]
Total Rate				8%	8%
Amount of Realized Gain/(Loss)		(409)		$ 0
Amount of Unrealized Gain/(Loss)		409		0
Amount of Interest, Fees or Dividends Credited to Income		0		8
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0		409
Gross Additions		409		0
Gross Reductions		409		0
Ending balance		0		409
Investment, Identifier [Axis]: Volusion, LLC, Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		2,576
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: Wahoo Fitness Acquisition L.L.C., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[1],[6],[7]				10.64%
Spread	[1],[6],[7]				5.75%
Investment, Identifier [Axis]: Wahoo Fitness Acquisition L.L.C., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[2],[4],[9]	14.93%
Spread	[2],[4],[9]	5.25%
PIK Rate	[2],[4],[9]	4.75%
Investment, Identifier [Axis]: Wahoo Fitness Acquisition L.L.C., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[2],[4],[9],[12]	10.64%
Spread	[2],[4],[9],[12]	5.75%
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		7%	[3],[4],[11]		7%	[5],[7],[8]
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.75%	[3],[4]		10.74%	[5],[7]
Spread		7%	[3],[4]		7%	[5],[7]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.07%	[3],[4],[61]		10.73%	[5],[7]
Spread		6.25%	[3],[4],[61]		6%	[5],[7]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.98%	[3],[4]		10.73%	[5],[7]
Spread		6%	[3],[4]		6%	[5],[7]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.98%	[3],[4]		10.73%	[5],[7]
Spread		6.25%	[3],[4]		6%	[5],[7]
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6%	[3],[4],[9],[11]		6%	[5],[6],[7],[8]
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.79%	[3],[4],[9]		8.59%	[5],[6],[7]
Spread		6%	[3],[4],[9]		6%	[5],[6],[7]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		7%	[3],[4],[11]		7%	[5],[7],[8]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 2
Schedule of Investments [Line Items]
Spread		7%	[3],[4],[11]		7%	[5],[7],[8]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.75%	[3],[4]		10.74%	[5],[7]
Spread		7%	[3],[4]		7%	[5],[7]
Investment, Identifier [Axis]: World Micro Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		3,845
Gross Additions		0
Gross Reductions		0
Ending balance		$ 3,845
Investment, Identifier [Axis]: World Micro Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13%			13%
Amount of Realized Gain/(Loss)		$ 0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		471
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		14,140
Gross Additions		7
Gross Reductions		0
Ending balance		$ 14,147
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[3]	9.92%
Spread		5.25%	[3]		5.25%	[5],[8]
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.34%	[3]		10.84%	[5]
Spread		5.25%	[3]		5.25%	[5]
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.35%	[3]		8.63%	[5]
Spread		5.25%	[3]		5.25%	[5]
Investment, Identifier [Axis]: YS Garments, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.50%	[2],[4]		9.51%	[1],[7]
Spread		6%	[2],[4]		5.50%	[1],[7]
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 0		0
Amount of Unrealized Gain/(Loss)		(170)		0
Amount of Interest, Fees or Dividends Credited to Income		0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		240		2,130
Gross Additions		0		0
Gross Reductions		170		0
Ending balance		$ 70		$ 2,130
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%		12%	12%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		14		19
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		450		625
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		$ 450		$ 625
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		6.50%		6.50%	6.50%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		0		0
Amount of Interest, Fees or Dividends Credited to Income		16		16
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		945		1,000
Gross Additions		0		0
Gross Reductions		0		0
Ending balance		$ 945		$ 1,000
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		14%		14%	14%
Amount of Realized Gain/(Loss)		$ 0		$ 0
Amount of Unrealized Gain/(Loss)		(215)		0
Amount of Interest, Fees or Dividends Credited to Income		96		96
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		2,676		2,750
Gross Additions		0		0
Gross Reductions		215		0
Ending balance		2,461		$ 2,750
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Amount of Interest, Fees or Dividends Credited to Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance		0
Gross Additions		0
Gross Reductions		0
Ending balance		$ 0
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.15%	[3],[4],[9],[49]		11.67%	[5],[6],[7]
Spread		7.25%	[3],[4],[9],[49]		7.25%	[5],[6],[7]
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.12%	[3],[4],[9],[49]		11.67%	[5],[6],[7],[60]
Spread		7.25%	[3],[4],[9],[49]		7.25%	[5],[6],[7],[60]
[1] Middle Market portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Middle Market portfolio investments. Middle Market portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Middle Market portfolio investments. Private Loan portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Private Loan portfolio investments. Private Loan portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Private Loan portfolio investments. Other Portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Other Portfolio investments. Other Portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Other Portfolio investments. Short-term portfolio investments. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of short-term portfolio investments. Short-term portfolio investments. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of short-term portfolio investments.