Consolidated Schedule of Investments In and Advances to Affiliates (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2022		Sep. 30, 2021	Sep. 30, 2022		Sep. 30, 2021	Dec. 31, 2021
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 5,031		$ 8,305	$ 3,302		$ 10,575
Amount of Unrealized Gain/(Loss)		(10,081)		38,631	(19,922)		117,072
Control investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					(5,822)		(4,459)
Amount of Unrealized Gain/(Loss)					20,618		65,756
Amount of Interest, Fees or Dividends Credited to Income					110,751		85,904
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,489,257		1,113,725
Gross Additions					280,134		340,046
Gross Reductions					128,214		117,553
Ending balance		1,599,429		1,336,218	1,599,429		1,336,218
Control investments | Midwest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 346,535		$ 297,953	$ 346,535		$ 297,953
Net assets, percentage		21.70%		25.90%	21.70%		25.90%
Control investments | Northeast
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance				$ 117,017			$ 117,017
Net assets, percentage				10.80%			10.80%
Control investments | Southeast
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 16,360		$ 44,538	$ 16,360		$ 44,538
Net assets, percentage		1.00%		1.20%	1.00%		1.20%
Control investments | Southwest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 593,513		$ 573,437	$ 593,513		$ 573,437
Net assets, percentage		37.10%		44.40%	37.10%		44.40%
Control investments | West
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 498,340		$ 303,273	$ 498,340		$ 303,273
Net assets, percentage		31.20%		37.30%	31.20%		37.30%
Control investments | Northeast Region and Canada
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 144,681			$ 144,681
Net assets, percentage		9.00%			9.00%
Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 1,340		$ 3,962
Amount of Unrealized Gain/(Loss)					3,703		30,518
Amount of Interest, Fees or Dividends Credited to Income					38,300		34,785
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					549,214		366,301
Gross Additions					92,606		195,509
Gross Reductions					56,642		88,934
Ending balance		$ 552,581		$ 485,139	552,581		485,139
Affiliate investments | Midwest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 67,491		$ 41,535	$ 67,491		$ 41,535
Net assets, percentage		12.20%		13.90%	12.20%		13.90%
Affiliate investments | Northeast
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance				$ 144,241			$ 144,241
Net assets, percentage				21.70%			21.70%
Affiliate investments | Southeast
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 196,507		$ 134,602	$ 196,507		$ 134,602
Net assets, percentage		35.60%		40.50%	35.60%		40.50%
Affiliate investments | Southwest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 99,261		$ 109,522	$ 99,261		$ 109,522
Net assets, percentage		18.00%		20.50%	18.00%		20.50%
Affiliate investments | West
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 83,950		$ 55,239	$ 83,950		$ 55,239
Net assets, percentage		15.20%		17.30%	15.20%		17.30%
Affiliate investments | Northeast Region and Canada
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 105,372			$ 105,372
Net assets, percentage		19.10%			19.10%
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt One August 16, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	11.13%			11.13%
Spread	[1],[2],[3]	8.00%			8.00%
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt Three August 16, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	11.31%			11.31%
Spread	[1],[2],[3]	8.00%			8.00%
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt Two August 16, 2022
Schedule of Investments [Line Items]
Spread	[1],[2],[3],[4]	8.00%			8.00%
Investment, Identifier [Axis]: Salient Partners L.P., Secured Debt September 30,2021
Schedule of Investments [Line Items]
Total Rate	[5],[6]							6.00%
Spread	[5],[6]							5.00%
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt November 19,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							8.00%
Spread	[6],[7]							7.00%
Investment, Identifier [Axis]: 2717 MH, L.P., LP Interests (2717 HPP-MS, L.P.) | Other controlled 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		250
Gross Additions					244		0
Gross Reductions					0		250
Ending balance		$ 244		$ 0	244		0
Investment, Identifier [Axis]: 2717 MH, L.P., LP Interests (2717 MH, L.P.) | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					1,979		585
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,971		2,702
Gross Additions					3,171		689
Gross Reductions					0		0
Ending balance		7,142		$ 3,391	7,142		$ 3,391
Investment, Identifier [Axis]: AAC Holdings, Inc, Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate				18.00%			18.00%
PIK Rate				8.00%			8.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(89)
Amount of Interest, Fees or Dividends Credited to Income							1,329
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							9,187
Gross Additions							744
Gross Reductions							223
Ending balance				$ 9,708			9,708
Investment, Identifier [Axis]: AAC Holdings, Inc, Warrants | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(968)
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							2,938
Gross Additions							0
Gross Reductions							968
Ending balance				1,970			1,970
Investment, Identifier [Axis]: AAC Holdings, Inc., Common Stock | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(2,004)		(1,038)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,079		3,148
Gross Additions					0		0
Gross Reductions					2,004		1,038
Ending balance		$ 75		2,110	$ 75		2,110
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		18.00%			18.00%
PIK Rate		18.00%			18.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					143
Amount of Interest, Fees or Dividends Credited to Income					1,492
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					9,794
Gross Additions					1,182
Gross Reductions					0
Ending balance		$ 10,976			$ 10,976
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt December 11, 2020
Schedule of Investments [Line Items]
Total Rate	[8]	18.00%			18.00%
PIK Rate	[8]	18.00%			18.00%
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt December 11,2020
Schedule of Investments [Line Items]
Total Rate	[5]							18.00%
PIK Rate	[5]							8.00%
Investment, Identifier [Axis]: AAC Holdings, Inc., Warrant | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(1,865)
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,940
Gross Additions					0
Gross Reductions					1,865
Ending balance		$ 75			$ 75
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt One September 06, 2022
Schedule of Investments [Line Items]
Spread	[1],[2],[3],[4]	6.00%			6.00%
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt Three September 06, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	9.17%			9.17%
Spread	[1],[2],[3]	6.00%			6.00%
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt Two September 06, 2022
Schedule of Investments [Line Items]
Spread	[1],[2],[3],[4]	6.00%			6.00%
Investment, Identifier [Axis]: ADS Tactical, Inc. Secured Debt March 29, 2021
Schedule of Investments [Line Items]
Total Rate	[3],[8]	8.80%			8.80%
Spread	[3],[8]	5.75%			5.75%
Investment, Identifier [Axis]: ADS Tactical, Inc., Secured Debt March 29,2021
Schedule of Investments [Line Items]
Total Rate	[5],[6]							6.75%
Spread	[5],[6]							5.75%
Investment, Identifier [Axis]: AFG Capital Group, LLC, Preferred Member Units | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							1,570
Amount of Interest, Fees or Dividends Credited to Income							200
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							5,810
Gross Additions							1,570
Gross Reductions							0
Ending balance				$ 7,380			$ 7,380
Investment, Identifier [Axis]: AFG Capital Group, LLC, Preferred Member Units One | 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					2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					144
Gross Additions					0
Gross Reductions					144
Ending balance		$ 0			0
Investment, Identifier [Axis]: AFG Capital Group, LLC, Preferred Member Units Two | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					1,040
Amount of Interest, Fees or Dividends Credited to Income					200
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					7,740
Gross Additions					1,040
Gross Reductions					0
Ending balance		$ 8,780			$ 8,780
Investment, Identifier [Axis]: AFG Capital Group, LLC, Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate				10.00%			10.00%
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							491
Gross Additions							0
Gross Reductions							260
Ending balance				$ 231			231
Investment, Identifier [Axis]: AFG Capital Group, LLC, Secured Debt April 25,2019
Schedule of Investments [Line Items]
Total Rate								10.00%
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt One August 31, 2022
Schedule of Investments [Line Items]
Spread	[1],[2],[3],[4]	7.40%			7.40%
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt Two August 31, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	9.84%			9.84%
Spread	[1],[2],[3]	7.40%			7.40%
Investment, Identifier [Axis]: ASC Interests, LLC, Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					80		(400)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					720		1,120
Gross Additions					80		0
Gross Reductions					0		400
Ending balance		$ 800		$ 720	$ 800		$ 720
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				13.00%			13.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							193
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							1,715
Gross Additions							116
Gross Reductions							0
Ending balance				$ 1,831			1,831
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt August 1,2013
Schedule of Investments [Line Items]
Total Rate								13.00%
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt December 31,2019
Schedule of Investments [Line Items]
Total Rate								13.00%
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt One | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					24
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					200
Gross Additions					130
Gross Reductions					30
Ending balance		$ 300			$ 300
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt One December 31,2019
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt Two | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					211
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,636
Gross Additions					12
Gross Reductions					0
Ending balance		$ 1,648			$ 1,648
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt Two August 1,2013
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Preferred Member Units One | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(3,200)
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							3,200
Gross Additions							0
Gross Reductions							3,200
Ending balance				0			0
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Preferred Member Units Two | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							2,356
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							4,783
Gross Reductions							0
Ending balance				$ 4,783			$ 4,783
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Secured Debt | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%
Spread				10.00%			10.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							520
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							4,873
Gross Additions							134
Gross Reductions							220
Ending balance				$ 4,787			4,787
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Warrants | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(10)
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							10
Gross Additions							0
Gross Reductions							10
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: ASK Analytical Systems Keco Holdings, LLC, Preferred Member Units One | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		12.63%			12.63%
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			0
Investment, Identifier [Axis]: ASK Analytical Systems Keco Holdings, LLC, Preferred Member Units Two | Majority-owned investments
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					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,894
Gross Additions					0
Gross Reductions					1,050
Ending balance		$ 3,844			$ 3,844
Investment, Identifier [Axis]: ASK Analytical Systems Keco Holdings, LLC, Secured Debt One | Majority-owned investments
Schedule of Investments [Line Items]
Spread		10.00%			10.00%
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					(4)
Gross Additions					1
Gross Reductions					0
Ending balance		$ (3)			$ (3)
Investment, Identifier [Axis]: ASK Analytical Systems Keco Holdings, LLC, Secured Debt Two | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		12.63%			12.63%
Spread		10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					506
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,740
Gross Additions					65
Gross Reductions					210
Ending balance		$ 4,595			4,595
Investment, Identifier [Axis]: ASK Analytical Systems Keco Holdings, LLC, Warrants | Majority-owned 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			$ 0
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt One January 18,2022
Schedule of Investments [Line Items]
Spread	[1],[2],[3],[4]	6.50%			6.50%
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt Three January 18,2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	9.84%			9.84%
Spread	[1],[2],[3]	7.50%			7.50%
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt Two January 18,2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	7.84%			7.84%
Spread	[1],[2],[3]	5.50%			5.50%
Investment, Identifier [Axis]: ATS Workholding, LLC, Preferred Member Units | Other controlled 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			$ 0
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				5.00%			5.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(304)
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							3,347
Gross Additions							0
Gross Reductions							472
Ending balance				$ 2,875			$ 2,875
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt November 16,2017
Schedule of Investments [Line Items]
Total Rate	[7],[9]							5.00%
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt One | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		5.00%			5.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(411)
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,088
Gross Additions					147
Gross Reductions					435
Ending balance		$ 800			$ 800
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt One November 16,2017
Schedule of Investments [Line Items]
Total Rate	[1],[10]	5.00%			5.00%
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt Two | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		5.00%			5.00%
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					1,917
Gross Additions					0
Gross Reductions					619
Ending balance		$ 1,298			$ 1,298
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt Two November 16,2017
Schedule of Investments [Line Items]
Total Rate	[1],[10]	5.00%			5.00%
Investment, Identifier [Axis]: ATX Networks Corp., Common Stock | 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					0
Gross Additions					0
Gross Reductions					0
Ending balance		$ 0			$ 0
Investment, Identifier [Axis]: ATX Networks Corp., Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		11.14%			11.14%
Spread		7.50%			7.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					403
Amount of Interest, Fees or Dividends Credited to Income					562
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					7,092
Gross Additions					631
Gross Reductions					1,016
Ending balance		$ 6,707			$ 6,707
Investment, Identifier [Axis]: ATX Networks Corp., Secured Debt One | Affiliate investments
Schedule of Investments [Line Items]
Total Rate				10.00%			10.00%
PIK Rate				10.00%			10.00%
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							1,963
Gross Reductions							0
Ending balance				$ 1,963			$ 1,963
Investment, Identifier [Axis]: ATX Networks Corp., Secured Debt September 01, 2021
Schedule of Investments [Line Items]
Total Rate	[3],[8]	11.14%			11.14%
Spread	[3],[8]	7.50%			7.50%
Investment, Identifier [Axis]: ATX Networks Corp., Secured Debt September 01,2021
Schedule of Investments [Line Items]
Total Rate	[5],[6]							8.50%
Spread	[5],[6]							7.50%
Investment, Identifier [Axis]: ATX Networks Corp., Secured Debt Three | Affiliate investments
Schedule of Investments [Line Items]
Total Rate				8.75%			8.75%
Spread				6.25%			6.25%
PIK Rate				1.50%			1.50%
Amount of Realized Gain/(Loss)							$ (4,528)
Amount of Unrealized Gain/(Loss)							1,133
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							12,263
Gross Additions							1,521
Gross Reductions							13,784
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: ATX Networks Corp., Secured Debt Two | Affiliate investments
Schedule of Investments [Line Items]
Total Rate				8.50%			8.50%
Spread				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							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							7,092
Gross Reductions							0
Ending balance				$ 7,092			7,092
Investment, Identifier [Axis]: ATX Networks Corp., Unsecured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		10.00%			10.00%
PIK Rate		10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					260
Amount of Interest, Fees or Dividends Credited to Income					242
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,963
Gross Additions					502
Gross Reductions					0
Ending balance		$ 2,465			$ 2,465
Investment, Identifier [Axis]: ATX Networks Corp., Unsecured Debt September 01, 2021
Schedule of Investments [Line Items]
Total Rate	[8]	10.00%			10.00%
PIK Rate	[8]	10.00%			10.00%
Investment, Identifier [Axis]: ATX Networks Corp., Unsecured Debt September 01,2021
Schedule of Investments [Line Items]
Total Rate	[5]							10.00%
PIK Rate	[5]							10.00%
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt December 15,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							7.50%
Spread	[6],[7]							6.50%
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt One December 15, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	10.32%			10.32%
Spread	[1],[3]	7.00%			7.00%
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt Two December 15, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	10.29%			10.29%
Spread	[1],[3]	7.00%			7.00%
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt May 26,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							14.00%
Spread	[6],[7]							12.50%
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt November 02,2020
Schedule of Investments [Line Items]
Total Rate	[6],[7]							10.00%
Spread	[6],[7]							8.50%
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt One November 02, 2020
Schedule of Investments [Line Items]
Total Rate	[1],[3]	10.78%			10.78%
Spread	[1],[3]	8.50%			8.50%
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt Two November 02, 2020
Schedule of Investments [Line Items]
Total Rate	[1],[3]	10.00%			10.00%
Spread	[1],[3]	8.50%			8.50%
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt Two May 26 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	14.78%			14.78%
Spread	[1],[3]	12.50%			12.50%
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt One June 28, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[3]	12.02%			12.02%
Spread	[1],[3]	9.50%			9.50%
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt Two June 28, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[3]	12.02%			12.02%
Spread	[1],[3]	9.50%			9.50%
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt One March 11, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[3]	12.75%			12.75%
Spread	[1],[3]	6.50%			6.50%
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt Two March 11, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[3]	10.75%			10.75%
Spread	[1],[3]	7.50%			7.50%
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt November 19,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							7.00%
Spread	[6],[7]							6.00%
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt One November 19, 2021
Schedule of Investments [Line Items]
Spread	[1],[3],[4]	7.00%			7.00%
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt Two November 19, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	8.01%			8.01%
Spread	[1],[3]	7.00%			7.00%
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt December 21,2018
Schedule of Investments [Line Items]
Total Rate	[6],[7]							9.00%
Spread	[6],[7]							8.00%
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt Two March 11, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	10.98%			10.98%
Spread	[1],[2],[3]	8.75%			8.75%
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt one March 11, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	8.98%			8.98%
Spread	[1],[2],[3]	6.75%			6.75%
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt May 19,2016
Schedule of Investments [Line Items]
Total Rate	[5],[6],[9]							7.50%
Spread	[5],[6],[9]							6.50%
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt One, May 19, 2016
Schedule of Investments [Line Items]
Total Rate	[3],[8],[10]	7.50%			7.50%
Spread	[3],[8],[10]	6.50%			6.50%
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt September 17, 2021
Schedule of Investments [Line Items]
Total Rate	[8],[10]	7.50%			7.50%
Spread	[8],[10]	6.50%			6.50%
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt September 17,2021
Schedule of Investments [Line Items]
Total Rate	[5],[6],[9],[11]							7.50%
Spread	[5],[6],[9],[11]							6.50%
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units One August 16, 2019
Schedule of Investments [Line Items]
Total Rate		12.63%			12.63%
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt One August 16,2019
Schedule of Investments [Line Items]
Spread	[3],[4]	10.00%			10.00%
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt August 16,2019
Schedule of Investments [Line Items]
Total Rate	[6]							12.00%
Spread	[6]							10.00%
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt Two August 16, 2019
Schedule of Investments [Line Items]
Total Rate	[3]	12.63%			12.63%
Spread	[3]	10.00%			10.00%
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt November 09,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							8.00%
Spread	[6],[7]							7.00%
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt One November 09, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.97%			9.97%
Spread	[1],[3]	7.00%			7.00%
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt Two November 09, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.87%			9.87%
Spread	[1],[3]	7.00%			7.00%
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt One August 11, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	9.65%			9.65%
Spread	[1],[2],[3]	6.50%			6.50%
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt Two August 11, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	8.91%			8.91%
Spread	[1],[2],[3]	6.50%			6.50%
Investment, Identifier [Axis]: Arrow International, Inc, Secured Debt December 21, 2020
Schedule of Investments [Line Items]
Total Rate	[1],[3],[12]	11.96%			11.96%
Spread	[1],[3],[12]	5.61%			5.61%
Investment, Identifier [Axis]: Arrow International, Inc, Secured Debt December 21,2020
Schedule of Investments [Line Items]
Total Rate	[6],[7],[13]							9.18%
Spread	[6],[7],[13]							7.93%
Investment, Identifier [Axis]: BBB Tank Services, LLC, Member Units | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					0		(280)
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		280
Gross Additions					0		0
Gross Reductions					0		280
Ending balance		$ 0		$ 0	$ 0		$ 0
Investment, Identifier [Axis]: BBB Tank Services, LLC, Preferred Stock (non-voting) | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		15.00%		15.00%	15.00%		15.00%
PIK Rate		15.00%		15.00%	15.00%		15.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		(162)
Amount of Interest, Fees or Dividends Credited to Income					0		11
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		151
Gross Additions					0		11
Gross Reductions					0		162
Ending balance		$ 0		$ 0	$ 0		$ 0
Investment, Identifier [Axis]: BBB Tank Services, LLC, Preferred Stock (non-voting) December 17, 2018
Schedule of Investments [Line Items]
Total Rate		15.00%			15.00%
PIK Rate		15.00%			15.00%
Investment, Identifier [Axis]: BBB Tank Services, LLC, Preferred Stock (non-voting) December 17,2018
Schedule of Investments [Line Items]
Total Rate	[14]							15.00%
PIK Rate	[14]							15.00%
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%
Spread				11.00%			11.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(1,000)
Amount of Interest, Fees or Dividends Credited to Income							464
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							4,722
Gross Additions							27
Gross Reductions							1,001
Ending balance				$ 3,748			3,748
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt April 08,2016
Schedule of Investments [Line Items]
Total Rate	[6],[11]							12.00%
Spread	[6],[11]							11.00%
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt One | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		13.56%			13.56%
Spread		11.00%			11.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					75
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					800
Gross Additions					0
Gross Reductions					0
Ending balance		$ 800			$ 800
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt One April 08, 2016
Schedule of Investments [Line Items]
Total Rate	[3],[15]	13.56%			13.56%
Spread	[3],[15]	11.00%			11.00%
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt Two | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		13.56%			13.56%
Spread		11.00%			11.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(209)
Amount of Interest, Fees or Dividends Credited to Income					377
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,707
Gross Additions					0
Gross Reductions					209
Ending balance		$ 1,498			$ 1,498
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt Two April 08, 2016
Schedule of Investments [Line Items]
Total Rate	[3],[15]	13.56%			13.56%
Spread	[3],[15]	11.00%			11.00%
Investment, Identifier [Axis]: Barfly Ventures, LLC, Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					1,390
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,930
Gross Additions					1,390
Gross Reductions					0
Ending balance		$ 3,320			$ 3,320
Investment, Identifier [Axis]: Barfly Ventures, LLC, Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							346
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							1,584
Gross Additions							346
Gross Reductions							0
Ending balance				$ 1,930			$ 1,930
Investment, Identifier [Axis]: Barfly Ventures, LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		7.00%		7.00%	7.00%		7.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					38		58
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					710		343
Gross Additions					1		367
Gross Reductions					0		0
Ending balance		$ 711		$ 710	$ 711		710
Investment, Identifier [Axis]: Barfly Ventures, LLC, Secured Debt October 15, 2020
Schedule of Investments [Line Items]
Total Rate	[1]	7.00%			7.00%
Investment, Identifier [Axis]: Barfly Ventures, LLC, Secured Debt October 15,2020
Schedule of Investments [Line Items]
Total Rate	[7]							7.00%
Investment, Identifier [Axis]: Batjer TopCo, LLC, Preferred Stock | Other controlled 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					4,095
Gross Reductions					0
Ending balance		$ 4,095			4,095
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt One | Other controlled 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					4
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					451
Gross Reductions					459
Ending balance		$ (8)			$ (8)
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt Three | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		11.00%			11.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					824
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					10,927
Gross Reductions					0
Ending balance		$ 10,927			$ 10,927
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt Three March 7,2022
Schedule of Investments [Line Items]
Total Rate		11.00%			11.00%
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt Two | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		11.00%			11.00%
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			$ 0
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units July 06,2018
Schedule of Investments [Line Items]
Total Rate	[7],[16]							8.00%
PIK Rate	[7],[16]							8.00%
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units November 12,2019
Schedule of Investments [Line Items]
Total Rate	[7],[14],[16]							16.00%
PIK Rate	[7],[14],[16]							16.00%
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units One July 06, 2018
Schedule of Investments [Line Items]
Total Rate	[1],[17],[18]	8.00%			8.00%
PIK Rate	[1],[17],[18]	8.00%			8.00%
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units Two November 12, 2019
Schedule of Investments [Line Items]
Total Rate	[1],[17],[18]	16.00%			16.00%
PIK Rate	[1],[17],[18]	16.00%			16.00%
Investment, Identifier [Axis]: Berry Aviation, Inc., Secured Debt July 06, 2018
Schedule of Investments [Line Items]
Total Rate	[1]	12.00%			12.00%
Spread	[1]	10.50%			10.50%
PIK Rate	[1]	1.50%			1.50%
Investment, Identifier [Axis]: Berry Aviation, Inc., Secured Debt July 06,2018
Schedule of Investments [Line Items]
Total Rate	[7]							12.00%
PIK Rate	[7]							1.50%
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt One June 30, 2022
Schedule of Investments [Line Items]
Spread	[1],[2],[3],[4]	6.00%			6.00%
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt Two June 30, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	9.78%			9.78%
Spread	[1],[2],[3]	6.75%			6.75%
PIK Rate	[1],[2],[3]	5.75%			5.75%
Investment, Identifier [Axis]: Binswanger Enterprises, LLC, Secured Debt March 10,2017
Schedule of Investments [Line Items]
Total Rate	[6],[7]							9.50%
Spread	[6],[7]							8.50%
Investment, Identifier [Axis]: Bluestem Brands, Inc, Secured Debt August 28, 2020
Schedule of Investments [Line Items]
Total Rate	[3],[8]	11.29%			11.29%
Spread	[3],[8]	8.50%			8.50%
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt August 28,2020
Schedule of Investments [Line Items]
Total Rate	[5],[6]							10.00%
Spread	[5],[6]							8.50%
Investment, Identifier [Axis]: Boccella Precast Products LLC, Member Units | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					(1,510)		(1,210)
Amount of Interest, Fees or Dividends Credited to Income					73		379
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,830		6,040
Gross Additions					0		0
Gross Reductions					1,510		1,210
Ending balance		$ 3,320		$ 4,830	$ 3,320		$ 4,830
Investment, Identifier [Axis]: Boccella Precast Products LLC, Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate				10.00%			10.00%
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							320
Gross Reductions							0
Ending balance				$ 320			$ 320
Investment, Identifier [Axis]: Boccella Precast Products LLC, Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					24
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					320
Gross Additions					0
Gross Reductions					0
Ending balance		$ 320			$ 320
Investment, Identifier [Axis]: Boccella Precast Products LLC, Secured Debt September 23, 2021
Schedule of Investments [Line Items]
Total Rate		10.00%			10.00%
Investment, Identifier [Axis]: Boccella Precast Products LLC, Secured Debt September 23,2021
Schedule of Investments [Line Items]
Total Rate								10.00%
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Class A Preferred Member Units | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				14.00%			14.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							1,067
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							10,194
Gross Additions							0
Gross Reductions							0
Ending balance				$ 10,194			$ 10,194
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Class A Preferred Member Units December 31,2020
Schedule of Investments [Line Items]
Total Rate	[14]							14.00%
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Class B Preferred Member Units | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		8.00%		8.00%	8.00%		8.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					3,840		6,310
Amount of Interest, Fees or Dividends Credited to Income					558		2,087
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					23,170		14,000
Gross Additions					3,840		6,310
Gross Reductions					0		0
Ending balance		$ 27,010		$ 20,310	$ 27,010		$ 20,310
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Class B Preferred Member Units December 31,2020
Schedule of Investments [Line Items]
Total Rate		8.00%	[17]		8.00%	[17]		8.00%	[14]
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt December 31,2020
Schedule of Investments [Line Items]
Total Rate	[6]							10.50%
Spread	[6]							9.00%
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt One | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				10.50%			10.50%
Spread		8.00%		9.00%	8.00%		9.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		329
Amount of Interest, Fees or Dividends Credited to Income					19		2,582
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		27,225
Gross Additions					0		11,775
Gross Reductions					0		0
Ending balance		$ 0		$ 39,000	$ 0		$ 39,000
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt One December 31,2020
Schedule of Investments [Line Items]
Spread	[3],[4]	8.00%			8.00%
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt Two | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		12.63%		9.50%	12.63%		9.50%
Spread		10.00%		8.00%	10.00%		8.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					266		0
Amount of Interest, Fees or Dividends Credited to Income					5,780		36
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					39,000		0
Gross Additions					60,194		500
Gross Reductions					0		500
Ending balance		$ 99,194		$ 0	$ 99,194		0
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt Two December 31,2020
Schedule of Investments [Line Items]
Total Rate	[3]	12.63%			12.63%
Spread	[3]	10.00%			10.00%
Investment, Identifier [Axis]: Bond-Coat, Inc., Common Stock | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							(2,320)
Amount of Unrealized Gain/(Loss)							4,310
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							2,040
Gross Additions							4,310
Gross Reductions							6,350
Ending balance				0			0
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt August 12,2014
Schedule of Investments [Line Items]
Total Rate	[6],[7],[9],[11]							12.50%
Spread	[6],[7],[9],[11]							9.25%
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt One August 12, 2014
Schedule of Investments [Line Items]
Total Rate	[1],[3],[10],[15]	12.50%			12.50%
Spread	[1],[3],[10],[15]	9.25%			9.25%
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt Two August 12, 2014
Schedule of Investments [Line Items]
Total Rate	[1],[3],[10],[15]	12.50%			12.50%
Spread	[1],[3],[10],[15]	9.25%			9.25%
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Preferred Member Units | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(2,040)
Amount of Interest, Fees or Dividends Credited to Income					795
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					7,710
Gross Additions					0
Gross Reductions					2,040
Ending balance		$ 5,670			$ 5,670
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Preferred Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(1,570)
Amount of Interest, Fees or Dividends Credited to Income							397
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							5,850
Gross Additions							0
Gross Reductions							1,570
Ending balance				$ 4,280			$ 4,280
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Secured Debt | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		12.56%			12.56%
Spread		10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					649
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					8,037
Gross Additions					19
Gross Reductions					1,972
Ending balance		$ 6,084			$ 6,084
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				11.00%			11.00%
Spread				10.00%			10.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							708
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							8,513
Gross Additions							15
Gross Reductions							372
Ending balance				$ 8,156			8,156
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Secured Debt January 09,2018
Schedule of Investments [Line Items]
Total Rate	[6]							11.00%
Spread	[6]							10.00%
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Secured Debt January 9, 2018
Schedule of Investments [Line Items]
Total Rate	[3]	12.56%			12.56%
Spread		10.00%			10.00%
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Preferred Member Units | Other controlled 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					75		75
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	$ 1,000		$ 1,000
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt July 25, 2016
Schedule of Investments [Line Items]
Total Rate	[16]							13.00%
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt July 25,2016
Schedule of Investments [Line Items]
Total Rate								13.00%
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt One | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		13.00%		13.00%	13.00%		13.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					869		100
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					8,813		998
Gross Additions					0		2
Gross Reductions					0		0
Ending balance		$ 8,813		$ 1,000	$ 8,813		$ 1,000
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt One July 25, 2016
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt Two | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		13.00%		13.00%	13.00%		13.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					99		1,279
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,000		8,403
Gross Additions					0		410
Gross Reductions					0		0
Ending balance		$ 1,000		$ 8,813	$ 1,000		8,813
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt Two July 25, 2016
Schedule of Investments [Line Items]
Total Rate	[18]	13.00%			13.00%
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							840
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							3,220
Gross Additions							840
Gross Reductions							0
Ending balance				4,060			4,060
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants One | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					83
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,712
Gross Additions					83
Gross Reductions					0
Ending balance		$ 1,795			1,795
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants Two | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					117
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,348
Gross Additions					117
Gross Reductions					0
Ending balance		$ 2,465			$ 2,465
Investment, Identifier [Axis]: Brightwood Capital Fund Investments - Fund V, LP Interests (Brightwood Capital Fund V, LP) | 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							0
Gross Additions							1,000
Gross Reductions							0
Ending balance				$ 1,000			$ 1,000
Investment, Identifier [Axis]: Buca C, LLC, Preferred Member Units | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		6.00%			6.00%
PIK Rate		6.00%			6.00%
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			$ 0
Investment, Identifier [Axis]: Buca C, LLC, Preferred Member Units June 30, 2015
Schedule of Investments [Line Items]
Total Rate		6.00%			6.00%
PIK Rate		6.00%			6.00%
Investment, Identifier [Axis]: Buca C, LLC, Preferred Member Units June 30,2015
Schedule of Investments [Line Items]
Total Rate								6.00%
PIK Rate								6.00%
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		9.00%		10.25%	9.00%		10.25%
Spread				9.25%			9.25%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					1,604		(373)
Amount of Interest, Fees or Dividends Credited to Income					1,488		1,264
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					14,370		14,256
Gross Additions					1,602		487
Gross Reductions					1,966		373
Ending balance		$ 14,006		$ 14,370	$ 14,006		14,370
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt June 30, 2015
Schedule of Investments [Line Items]
Total Rate		9.00%			9.00%
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt June 30,2015
Schedule of Investments [Line Items]
Total Rate	[6],[11]							10.25%
Spread	[6],[11]							9.25%
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt June 14,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							6.00%
Spread	[6],[7]							5.00%
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt One June 14, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	7.52%			7.52%
Spread	[1],[3]	5.00%			5.00%
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt One June 14,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							6.00%
Spread	[6],[7]							5.00%
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt Two June 14, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	7.52%			7.52%
Spread	[1],[3]	5.00%			5.00%
Investment, Identifier [Axis]: CAI Software LLC, Member Units | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							7,321
Amount of Interest, Fees or Dividends Credited to Income							1,900
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							7,190
Gross Additions							7,321
Gross Reductions							1,921
Ending balance				$ 12,590			$ 12,590
Investment, Identifier [Axis]: CAI Software LLC, Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate				12.50%			12.50%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(1)
Amount of Interest, Fees or Dividends Credited to Income							5,547
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							47,474
Gross Additions							23,601
Gross Reductions							4,474
Ending balance				$ 66,601			66,601
Investment, Identifier [Axis]: CBT Nuggets, LLC, Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(2,370)
Amount of Interest, Fees or Dividends Credited to Income					2,471
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					50,620
Gross Additions					0
Gross Reductions					2,370
Ending balance		$ 48,250			48,250
Investment, Identifier [Axis]: CBT Nuggets, LLC, Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							6,540
Amount of Interest, Fees or Dividends Credited to Income							1,901
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							46,080
Gross Additions							6,540
Gross Reductions							0
Ending balance				52,620			52,620
Investment, Identifier [Axis]: CMS Minerals Investments, Member Units | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					331		453
Amount of Interest, Fees or Dividends Credited to Income					150		22
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,974		1,624
Gross Additions					331		454
Gross Reductions					415		195
Ending balance		$ 1,890		1,883	$ 1,890		1,883
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt November 14, 2017
Schedule of Investments [Line Items]
Total Rate	[1],[3],[19]	11.31%			11.31%
Spread	[1],[3],[19]	8.50%			8.50%
PIK Rate	[1],[3],[19]	0.13%			0.13%
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt November 14, 2017
Schedule of Investments [Line Items]
PIK Rate		2.00%			2.00%
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt November 14,2017
Schedule of Investments [Line Items]
Total Rate	[7],[20]							9.28%
PIK Rate	[7],[20]							0.22%
Investment, Identifier [Axis]: Café Brazil, LLC, Member Units | Majority-owned investments
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					178
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,570
Gross Additions					0
Gross Reductions					200
Ending balance		$ 2,370			2,370
Investment, Identifier [Axis]: Café Brazil, LLC, Member Units | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							540
Amount of Interest, Fees or Dividends Credited to Income							470
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							2,030
Gross Additions							540
Gross Reductions							0
Ending balance				2,570			2,570
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units July 31,2019
Schedule of Investments [Line Items]
Total Rate	[14]							15.00%
PIK Rate	[14]							15.00%
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units One | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					7,750		4,564
Amount of Interest, Fees or Dividends Credited to Income					188		188
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					13,275		6,241
Gross Additions					7,750		4,564
Gross Reductions					0		0
Ending balance		$ 21,025		$ 10,805	$ 21,025		$ 10,805
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units Two | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		15.00%		15.00%	15.00%		15.00%
PIK Rate		15.00%		15.00%	15.00%		15.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					792		939
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					9,510		8,255
Gross Additions					792		939
Gross Reductions					6,449		0
Ending balance		$ 3,853		$ 9,194	$ 3,853		$ 9,194
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units Two March 30,2018
Schedule of Investments [Line Items]
Total Rate	[17]	15.00%			15.00%
PIK Rate	[17]	15.00%			15.00%
Investment, Identifier [Axis]: California Splendor Holdings LLC, Secured Debt | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		12.38%		11.00%	12.38%		11.00%
Spread		10.00%		10.00%	10.00%		10.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					52		36
Amount of Interest, Fees or Dividends Credited to Income					2,467		2,579
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					27,915		35,832
Gross Additions					85		196
Gross Reductions					0		8,129
Ending balance		$ 28,000		$ 27,899	$ 28,000		27,899
Investment, Identifier [Axis]: California Splendor Holdings LLC, Secured Debt March 30,2018
Schedule of Investments [Line Items]
Total Rate		12.38%	[3]		12.38%	[3]		11.00%	[6]
Spread		10.00%	[3]		10.00%	[3]		10.00%	[6]
Investment, Identifier [Axis]: Camin Cargo Control, Inc., Secured Debt June 14, 2021
Schedule of Investments [Line Items]
Total Rate	[3],[8]	9.62%			9.62%
Spread	[3],[8]	6.50%			6.50%
Investment, Identifier [Axis]: Camin Cargo Control, Inc., Secured Debt June 14,2021
Schedule of Investments [Line Items]
Total Rate	[5],[6]							7.50%
Spread	[5],[6]							6.50%
Investment, Identifier [Axis]: Career Team Holdings, LLC, Common Stock | 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					4,500
Gross Additions					0
Gross Reductions					0
Ending balance		$ 4,500			$ 4,500
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt December 17,2021
Schedule of Investments [Line Items]
Total Rate								12.50%
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt One | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		8.63%			8.63%
Spread		6.00%			6.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					5
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					0
Gross Reductions					0
Ending balance		$ 0			$ 0
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt One December 17, 2021
Schedule of Investments [Line Items]
Spread	[3],[4]	6.00%			6.00%
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt Two | Affiliate investments
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					1,950
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					20,050
Gross Additions					30
Gross Reductions					0
Ending balance		$ 20,080			$ 20,080
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt Two December 17, 2021
Schedule of Investments [Line Items]
Total Rate		12.50%			12.50%
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt One May 18, 2022
Schedule of Investments [Line Items]
Spread	[1],[3],[4]	5.25%			5.25%
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt Three May 18, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[3]	8.26%			8.26%
Spread	[1],[3]	5.25%			5.25%
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt Two May 18, 2022
Schedule of Investments [Line Items]
Spread	[1],[3],[4]	5.25%			5.25%
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Preferred Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					2,038
Amount of Interest, Fees or Dividends Credited to Income					90
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,840
Gross Additions					2,320
Gross Reductions					0
Ending balance		$ 8,160			$ 8,160
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Preferred Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(320)
Amount of Interest, Fees or Dividends Credited to Income							90
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							6,160
Gross Additions							0
Gross Reductions							320
Ending balance				$ 5,840			$ 5,840
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%
Spread				10.00%			10.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							969
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							11,549
Gross Additions							28
Gross Reductions							2,059
Ending balance				$ 9,518			9,518
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt One | Other controlled investments
Schedule of Investments [Line Items]
Spread		9.00%			9.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					25
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					1,440
Gross Reductions					1,440
Ending balance		$ 0			$ 0
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt Two | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		11.63%			11.63%
Spread		9.00%			9.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					507
Amount of Interest, Fees or Dividends Credited to Income					1,271
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					8,864
Gross Additions					6,470
Gross Reductions					387
Ending balance		$ 14,947			$ 14,947
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt January 04,2019
Schedule of Investments [Line Items]
Total Rate	[6]							12.00%
Spread	[6]							10.00%
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt One January 4, 2019
Schedule of Investments [Line Items]
Spread	[3],[4]	9.00%			9.00%
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt Two January 4, 2019
Schedule of Investments [Line Items]
Total Rate	[3]	11.63%			11.63%
Spread	[3]	9.00%			9.00%
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units One | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					(1,810)		160
Amount of Interest, Fees or Dividends Credited to Income					1,335		51
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					24,140		1,270
Gross Additions					0		160
Gross Reductions					1,810		0
Ending balance		$ 22,330		1,430	22,330		1,430
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units Two | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		(3,930)
Amount of Interest, Fees or Dividends Credited to Income					55		3,707
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,540		28,070
Gross Additions					451		0
Gross Reductions					0		3,930
Ending balance		$ 1,991		$ 24,140	$ 1,991		$ 24,140
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				9.00%			9.00%
Spread				8.00%			8.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							18
Amount of Interest, Fees or Dividends Credited to Income							1,117
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							15,212
Gross Additions							4,000
Gross Reductions							1,395
Ending balance				$ 17,817			17,817
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt February 26,2018
Schedule of Investments [Line Items]
Total Rate	[6]							9.00%
Spread	[6]							8.00%
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt One | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		8.63%			8.63%
Spread		6.00%			6.00%
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			$ 0
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt One February 26, 2018
Schedule of Investments [Line Items]
Spread	[3],[4]	6.00%			6.00%
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt Two | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		10.63%			10.63%
Spread		8.00%			8.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(51)
Amount of Interest, Fees or Dividends Credited to Income					1,314
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					17,817
Gross Additions					51
Gross Reductions					402
Ending balance		$ 17,466			$ 17,466
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt Two February 26, 2018
Schedule of Investments [Line Items]
Total Rate	[3]	10.63%			10.63%
Spread	[3]	8.00%			8.00%
Investment, Identifier [Axis]: Chandler Signs Holdings, LLC, Class A Units | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					510		(810)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					460		1,460
Gross Additions					510		0
Gross Reductions					0		810
Ending balance		$ 970		650	$ 970		650
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt One February 07, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	9.08%			9.08%
Spread	[1],[2],[3]	6.25%			6.25%
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt Two February 07, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3],[21]	7.70%			7.70%
Spread	[1],[2],[3],[21]	6.25%			6.25%
Investment, Identifier [Axis]: Charlotte Russe, Inc, Common Stock | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							(3,141)
Amount of Unrealized Gain/(Loss)							3,141
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							3,141
Gross Reductions							3,141
Ending balance				0			0
Investment, Identifier [Axis]: Charps, LLC, Preferred Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							3,720
Amount of Interest, Fees or Dividends Credited to Income							2,120
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							10,520
Gross Additions							3,720
Gross Reductions							0
Ending balance				$ 14,240			$ 14,240
Investment, Identifier [Axis]: Charps, LLC, Preferred Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(780)
Amount of Interest, Fees or Dividends Credited to Income					425
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					13,990
Gross Additions					0
Gross Reductions					780
Ending balance		$ 13,210			$ 13,210
Investment, Identifier [Axis]: Charps, LLC, Preferred Unsecured Debt August 26, 2020
Schedule of Investments [Line Items]
Total Rate		10.00%			10.00%
Investment, Identifier [Axis]: Charps, LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				15.00%			15.00%
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							669
Gross Additions							0
Gross Reductions							669
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: Charps, LLC, Unsecured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		10.00%		10.00%	10.00%		10.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(36)		(382)
Amount of Interest, Fees or Dividends Credited to Income					461		846
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,694		8,475
Gross Additions					36		282
Gross Reductions					36		3,723
Ending balance		$ 5,694		$ 5,034	5,694		5,034
Investment, Identifier [Axis]: Charps, LLC, Unsecured Debt February 26,2018
Schedule of Investments [Line Items]
Total Rate								10.00%
Investment, Identifier [Axis]: Chisholm Energy Holdings, LLC, Secured Debt May 15,2019
Schedule of Investments [Line Items]
Total Rate	[6],[7]							7.75%
Spread	[6],[7]							6.25%
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units One | Majority-owned 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							530
Gross Additions							0
Gross Reductions							0
Ending balance				530			530
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units Two | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							1,640
Amount of Interest, Fees or Dividends Credited to Income							2,181
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							8,610
Gross Additions							1,640
Gross Reductions							0
Ending balance				$ 10,250			$ 10,250
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units One | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					(760)
Amount of Interest, Fees or Dividends Credited to Income					595
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					10,250
Gross Additions					0
Gross Reductions					760
Ending balance		9,490			9,490
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units Two | Majority-owned investments
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					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					530
Gross Additions					80
Gross Reductions					0
Ending balance		$ 610			$ 610
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt One | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		12.13%		10.00%	12.13%		10.00%
Spread		9.50%			9.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					898		83
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					10,401		1,100
Gross Additions					29		0
Gross Reductions					0		22
Ending balance		$ 10,430		$ 1,078	$ 10,430		$ 1,078
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt One December 20, 2016
Schedule of Investments [Line Items]
Total Rate	[3]	12.13%			12.13%
Spread	[3]	9.50%			9.50%
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt One December 20,2016
Schedule of Investments [Line Items]
Total Rate	[6]							10.50%
Spread	[6]							9.50%
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt Two | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		10.00%		10.50%	10.00%		10.50%
Spread				9.50%			9.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					81		878
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,071		10,853
Gross Additions					0		0
Gross Reductions					24		460
Ending balance		$ 1,047		$ 10,393	$ 1,047		10,393
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt Two December 20, 2016
Schedule of Investments [Line Items]
Total Rate		10.00%			10.00%
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt Two December 20,2016
Schedule of Investments [Line Items]
Total Rate								10.00%
Investment, Identifier [Axis]: Clarius BIGS, LLC , Secured Debt September 23,2014
Schedule of Investments [Line Items]
Total Rate	[1],[10],[15]	15.00%			15.00%
PIK Rate	[1],[10],[15]	15.00%			15.00%
Investment, Identifier [Axis]: Clarius BIGS, LLC, Secured Debt September 23,2014
Schedule of Investments [Line Items]
Total Rate	[7],[9],[11]							15.00%
PIK Rate	[7],[9],[11]							15.00%
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Preferred Member Units | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					8,530		4,110
Amount of Interest, Fees or Dividends Credited to Income					1,294		820
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					15,260		9,510
Gross Additions					8,530		4,110
Gross Reductions					0		0
Ending balance		$ 23,790		$ 13,620	$ 23,790		$ 13,620
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt One | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		8.38%		7.00%	8.38%		7.00%
Spread		6.00%		6.00%	6.00%		6.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					455		26
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,000		0
Gross Additions					11,720		1,400
Gross Reductions					7,960		0
Ending balance		$ 7,760		$ 1,400	$ 7,760		$ 1,400
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt One March 12, 2020
Schedule of Investments [Line Items]
Total Rate	[3]	8.38%			8.38%
Spread	[3]	6.00%			6.00%
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt One March 12,2020
Schedule of Investments [Line Items]
Total Rate	[6]							7.00%
Spread	[6]							6.00%
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt Two | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		8.00%		8.00%	8.00%		8.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(32)		(73)
Amount of Interest, Fees or Dividends Credited to Income					1,201		1,807
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					19,274		24,800
Gross Additions					32		73
Gross Reductions					32		5,599
Ending balance		$ 19,274		$ 19,274	$ 19,274		19,274
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt Two March 12, 2020
Schedule of Investments [Line Items]
Total Rate		8.00%			8.00%
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt Two March 12,2020
Schedule of Investments [Line Items]
Total Rate								8.00%
Investment, Identifier [Axis]: Cody Pools, Inc., Preferred Member Units | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					9,570
Amount of Interest, Fees or Dividends Credited to Income					3,710
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					47,640
Gross Additions					9,570
Gross Reductions					0
Ending balance		$ 57,210			$ 57,210
Investment, Identifier [Axis]: Cody Pools, Inc., Preferred Member Units | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							15,450
Amount of Interest, Fees or Dividends Credited to Income							1,602
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							14,940
Gross Additions							15,450
Gross Reductions							0
Ending balance				$ 30,390			$ 30,390
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate				12.25%			12.25%
Spread				10.50%			10.50%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							6
Amount of Interest, Fees or Dividends Credited to Income							1,400
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							14,216
Gross Additions							8,000
Gross Reductions							4,169
Ending balance				$ 18,047			18,047
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt March 06,2020
Schedule of Investments [Line Items]
Total Rate	[6]							12.25%
Spread	[6]							10.50%
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt One | Majority-owned investments
Schedule of Investments [Line Items]
Spread		10.50%			10.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					84
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					(13)
Gross Additions					2,866
Gross Reductions					2,864
Ending balance		$ (11)			$ (11)
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt One March 06, 2020
Schedule of Investments [Line Items]
Spread	[3],[4]	10.50%			10.50%
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt Two | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		13.63%			13.63%
Spread		10.50%			10.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(66)
Amount of Interest, Fees or Dividends Credited to Income					4,044
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					42,497
Gross Additions					66
Gross Reductions					1,338
Ending balance		$ 41,225			$ 41,225
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt Two March 06, 2020
Schedule of Investments [Line Items]
Total Rate	[3]	13.63%			13.63%
Spread	[3]	10.50%			10.50%
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					80		780
Amount of Interest, Fees or Dividends Credited to Income					1,287		200
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					9,130		0
Gross Additions					80		8,460
Gross Reductions					0		0
Ending balance		$ 9,210		$ 8,460	9,210		$ 8,460
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							1,938
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							24,969
Gross Reductions							315
Ending balance				$ 24,654			24,654
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt March 31,2021
Schedule of Investments [Line Items]
Total Rate								12.00%
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt One | Other controlled 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					46
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					1,600
Gross Reductions					1,600
Ending balance		$ 0			$ 0
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt Two | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					2,224
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					24,351
Gross Additions					45
Gross Reductions					945
Ending balance		$ 23,451			$ 23,451
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt Two March 31, 2021
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Preferred Member Units | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					6,570
Amount of Interest, Fees or Dividends Credited to Income					474
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					12,000
Gross Additions					6,570
Gross Reductions					0
Ending balance		$ 18,570			$ 18,570
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Preferred Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							5,220
Amount of Interest, Fees or Dividends Credited to Income							316
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							6,780
Gross Additions							5,220
Gross Reductions							0
Ending balance				$ 12,000			$ 12,000
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				10.00%			10.00%
Spread				9.00%			9.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(16)
Amount of Interest, Fees or Dividends Credited to Income							609
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							7,954
Gross Additions							15
Gross Reductions							1,492
Ending balance				$ 6,477			6,477
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt January 29,2019
Schedule of Investments [Line Items]
Total Rate	[6]							10.00%
Spread	[6]							9.00%
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt One | Majority-owned investments
Schedule of Investments [Line Items]
Spread		9.00%			9.00%
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			$ 0
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt Two | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		11.63%			11.63%
Spread		9.00%			9.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(13)
Amount of Interest, Fees or Dividends Credited to Income					468
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,477
Gross Additions					13
Gross Reductions					1,140
Ending balance		$ 5,350			$ 5,350
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt Two January 29, 2019
Schedule of Investments [Line Items]
Total Rate	[3]	11.63%			11.63%
Spread	[3]	9.00%			9.00%
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt August 06,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							8.50%
Spread	[6],[7]							7.50%
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt One August 06, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	10.13%			10.13%
Spread	[1],[3]	7.50%			7.50%
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt Two August 06, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	10.37%			10.37%
Spread	[1],[3]	7.50%			7.50%
Investment, Identifier [Axis]: Congruent Credit Opportunities Funds, LP Interests (Congruent Credit Opportunities Fund II, LP) | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							(4,449)
Amount of Unrealized Gain/(Loss)							4,355
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							94
Gross Additions							4,355
Gross Reductions							4,449
Ending balance				0			0
Investment, Identifier [Axis]: Congruent Credit Opportunities Funds, LP Interests (Congruent Credit Opportunities Fund III, LP) | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					(63)		(96)
Amount of Interest, Fees or Dividends Credited to Income					427		583
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					9,959		11,540
Gross Additions					0		0
Gross Reductions					2,105		1,137
Ending balance		$ 7,854		10,403	7,854		10,403
Investment, Identifier [Axis]: Copper Trail Energy Fund I, LP - CTMH, LP Interests (CTMH, LP) | Other controlled 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					710		747
Gross Additions					0		0
Gross Reductions					0		37
Ending balance		710		710	710		710
Investment, Identifier [Axis]: Copper Trail Energy Fund I, LP, LP Interests (Copper Trail Energy Fund I, LP) | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							(203)
Amount of Unrealized Gain/(Loss)							379
Amount of Interest, Fees or Dividends Credited to Income							378
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							1,782
Gross Additions							379
Gross Reductions							2,161
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: DMA Industries, LLC, Preferred Equity | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					1,316
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,944
Gross Additions					1,316
Gross Reductions					0
Ending balance		$ 7,260			$ 7,260
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					175
Amount of Interest, Fees or Dividends Credited to Income					1,961
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					20,993
Gross Additions					207
Gross Reductions					0
Ending balance		$ 21,200			$ 21,200
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt November 19, 2021
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt November 30,2015
Schedule of Investments [Line Items]
Total Rate								12.00%
Investment, Identifier [Axis]: DTE Enterprises LLC Class A Class AA Preferred Member Units (non-voting) April 13, 2018
Schedule of Investments [Line Items]
Total Rate	[1],[17]	10.00%			10.00%
PIK Rate	[1],[17]	10.00%			10.00%
Investment, Identifier [Axis]: DTE Enterprises LLC Class A Preferred Member Units April 13, 2018
Schedule of Investments [Line Items]
Total Rate	[1]	8.00%			8.00%
PIK Rate	[1]	8.00%			8.00%
Investment, Identifier [Axis]: DTE Enterprises LLC Secured Debt One April 13, 2018
Schedule of Investments [Line Items]
Spread	[1],[3],[4]	7.50%			7.50%
Investment, Identifier [Axis]: DTE Enterprises LLC Secured Debt Two April 13, 2018
Schedule of Investments [Line Items]
Total Rate	[1],[3]	10.44%			10.44%
Spread	[1],[3]	7.50%			7.50%
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class A Preferred Member Units April 13,2018
Schedule of Investments [Line Items]
Total Rate	[7]							8.00%
PIK Rate	[7]							8.00%
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class AA Preferred Member Units (non-voting) April 13,2018
Schedule of Investments [Line Items]
Total Rate	[6],[7]							10.00%
PIK Rate	[6],[7]							10.00%
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt April 13,2018
Schedule of Investments [Line Items]
Total Rate	[6],[7]							9.50%
Spread	[6],[7]							8.00%
Investment, Identifier [Axis]: Darr Equipment LP, Secured Debt December 26,2017
Schedule of Investments [Line Items]
Total Rate	[7]							12.50%
PIK Rate	[7]							1.00%
Investment, Identifier [Axis]: Datacom, LLC , Preferred Member Units | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					60
Amount of Interest, Fees or Dividends Credited to Income					72
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,610
Gross Additions					60
Gross Reductions					0
Ending balance		$ 2,670			$ 2,670
Investment, Identifier [Axis]: Datacom, LLC , Secured Debt One | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		7.50%		8.00%	7.50%		8.00%
Amount of Realized Gain/(Loss)					$ 0		$ (1,800)
Amount of Unrealized Gain/(Loss)					0		185
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		1,615
Gross Additions					223		185
Gross Reductions					0		1,800
Ending balance		$ 223		$ 0	$ 223		$ 0
Investment, Identifier [Axis]: Datacom, LLC , Secured Debt Three | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate				5.00%			5.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							564
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							8,288
Gross Reductions							81
Ending balance				$ 8,207			$ 8,207
Investment, Identifier [Axis]: Datacom, LLC , Secured Debt Two | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		7.50%		10.50%	7.50%		10.50%
PIK Rate				10.50%			10.50%
Amount of Realized Gain/(Loss)					$ 0		$ (1,801)
Amount of Unrealized Gain/(Loss)					160		1,945
Amount of Interest, Fees or Dividends Credited to Income					624		1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					7,668		10,531
Gross Additions					284		1,945
Gross Reductions					203		12,476
Ending balance		$ 7,749		$ 0	$ 7,749		0
Investment, Identifier [Axis]: Datacom, LLC, Preferred Member Units One | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							(1,294)
Amount of Unrealized Gain/(Loss)							1,294
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							1,294
Gross Reductions							1,294
Ending balance				0			0
Investment, Identifier [Axis]: Datacom, LLC, Preferred Member Units Three | Majority-owned 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							2,610
Gross Reductions							0
Ending balance				2,610			2,610
Investment, Identifier [Axis]: Datacom, LLC, Preferred Member Units Two | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							(6,030)
Amount of Unrealized Gain/(Loss)							6,030
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							6,030
Gross Reductions							6,030
Ending balance				0			0
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt March 31,2021
Schedule of Investments [Line Items]
Total Rate								5.00%
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt One March 1, 2022
Schedule of Investments [Line Items]
Total Rate		7.50%			7.50%
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt Two March 31, 2021
Schedule of Investments [Line Items]
Total Rate		7.50%			7.50%
Investment, Identifier [Axis]: Digital Products Holdings LLC, Preferred Member Units | Other controlled 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					150		150
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	$ 9,835		$ 9,835
Investment, Identifier [Axis]: Digital Products Holdings LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				11.00%			11.00%
Spread				10.00%			10.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							1,494
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							18,077
Gross Additions							33
Gross Reductions							990
Ending balance				$ 17,120			17,120
Investment, Identifier [Axis]: Digital Products Holdings LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		12.63%			12.63%
Spread		10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					1,436
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					16,801
Gross Additions					33
Gross Reductions					990
Ending balance		$ 15,844			$ 15,844
Investment, Identifier [Axis]: Digital Products Holdings LLC, Secured Debt April 01, 2018
Schedule of Investments [Line Items]
Total Rate	[3]	12.63%			12.63%
Spread	[3]	10.00%			10.00%
Investment, Identifier [Axis]: Digital Products Holdings LLC, Secured Debt January 29,2019
Schedule of Investments [Line Items]
Total Rate	[6]							11.00%
Spread	[6]							10.00%
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Preferred Stock | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					3,870		(2,230)
Amount of Interest, Fees or Dividends Credited to Income					1,029		672
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					18,350		19,380
Gross Additions					3,870		0
Gross Reductions					0		2,230
Ending balance		$ 22,220		$ 17,150	$ 22,220		$ 17,150
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%
Spread				11.00%			11.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							1,401
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							15,006
Gross Additions							28
Gross Reductions							235
Ending balance				$ 14,799			14,799
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt February 13,2018
Schedule of Investments [Line Items]
Total Rate	[6]							12.00%
Spread	[6]							11.00%
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt One | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		13.63%			13.63%
Spread		11.00%			11.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					14
Amount of Interest, Fees or Dividends Credited to Income					102
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					(22)
Gross Additions					4,272
Gross Reductions					850
Ending balance		$ 3,400			$ 3,400
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt One February 13, 2018
Schedule of Investments [Line Items]
Total Rate	[3]	13.63%			13.63%
Spread	[3]	11.00%			11.00%
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt Two | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		13.63%			13.63%
Spread		11.00%			11.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(53)
Amount of Interest, Fees or Dividends Credited to Income					2,322
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					24,070
Gross Additions					53
Gross Reductions					1,073
Ending balance		$ 23,050			$ 23,050
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt Two February 13, 2018
Schedule of Investments [Line Items]
Total Rate	[3]	13.63%			13.63%
Spread	[3]	11.00%			11.00%
Investment, Identifier [Axis]: Dos Rios Partners, LP Interests (Dos Rios Partners - A, LP) | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					(1,147)		1,450
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					10,329		1,720
Gross Additions					0		1,450
Gross Reductions					1,147		0
Ending balance		$ 9,182		3,170	9,182		3,170
Investment, Identifier [Axis]: Dos Rios Partners, LP Interests (Dos Rios Partners, LP) | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(364)		4,567
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		5,417
Gross Additions					0		4,567
Gross Reductions					364		0
Ending balance		2,916		9,984	2,916		9,984
Investment, Identifier [Axis]: Dos Rios Stone Products LLC, Class A Preferred Units | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(290)		(340)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					640		1,250
Gross Additions					0		0
Gross Reductions					290		340
Ending balance		$ 350		910	$ 350		910
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt July 17,2018
Schedule of Investments [Line Items]
Total Rate	[6],[7]							9.50%
Spread	[6],[7]							8.50%
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt One July 17, 2018
Schedule of Investments [Line Items]
Spread	[1],[3],[4]	8.50%			8.50%
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt Three September 28, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[3]	12.75%			12.75%
Spread	[1],[3]	9.50%			9.50%
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt Two September 28, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[3]	10.75%			10.75%
Spread	[1],[3]	7.50%			7.50%
Investment, Identifier [Axis]: EIG Fund Investments, LP Interests (EIG Global Private Debt Fund-A, L.P.) | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 11		9
Amount of Unrealized Gain/(Loss)					0		92
Amount of Interest, Fees or Dividends Credited to Income					46		35
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					547		526
Gross Additions					1,093		125
Gross Reductions					170		177
Ending balance		$ 1,470		474	$ 1,470		474
Investment, Identifier [Axis]: EPIC Y-Grade Services, LP, Secured Debt June 22, 2018
Schedule of Investments [Line Items]
Total Rate	[3],[8]	8.08%			8.08%
Spread	[3],[8]	6.00%			6.00%
Investment, Identifier [Axis]: EPIC Y-Grade Services, LP, Secured Debt June 22,2018
Schedule of Investments [Line Items]
Total Rate	[5],[6]							7.00%
Spread	[5],[6]							6.00%
Investment, Identifier [Axis]: East Teak Fine Hardwoods, Inc., Common Stock | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							(80)
Amount of Unrealized Gain/(Loss)							180
Amount of Interest, Fees or Dividends Credited to Income							100
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							300
Gross Additions							180
Gross Reductions							480
Ending balance				0			0
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt November 19,2020
Schedule of Investments [Line Items]
Total Rate	[6],[7]							8.00%
Spread	[6],[7]							7.00%
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt One November 19, 2020
Schedule of Investments [Line Items]
Total Rate	[1],[3]	10.07%			10.07%
Spread	[1],[3]	7.00%			7.00%
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt Three November 19, 2020
Schedule of Investments [Line Items]
Total Rate	[1],[3]	10.07%			10.07%
Spread	[1],[3]	7.00%			7.00%
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt Two November 19, 2020
Schedule of Investments [Line Items]
Total Rate	[1],[3]	10.07%			10.07%
Spread	[1],[3]	7.00%			7.00%
Investment, Identifier [Axis]: Emerald Technologies Acquisition Co, Inc., Secured Debt February 10, 2022
Schedule of Investments [Line Items]
Total Rate	[2],[3],[8]	9.38%			9.38%
Spread	[2],[3],[8]	6.25%			6.25%
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt One May 23, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	11.00%			11.00%
Spread	[1],[2],[3]	6.25%			6.25%
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt Two May 23, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	9.38%			9.38%
Spread	[1],[2],[3]	6.25%			6.25%
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt December 22,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7],[16]							8.00%
Spread	[6],[7],[16]							7.00%
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt One December 22, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3],[18]	9.25%			9.25%
Spread	[1],[3],[18]	7.00%			7.00%
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt Two December 22, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3],[18]	10.67%			10.67%
Spread	[1],[3],[18]	7.00%			7.00%
Investment, Identifier [Axis]: Flame King Holdings, LLC, Preferred Equity | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					3,440
Amount of Interest, Fees or Dividends Credited to Income					909
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					10,400
Gross Additions					3,440
Gross Reductions					0
Ending balance		$ 13,840			$ 13,840
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt One | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		9.25%			9.25%
Spread		6.50%			6.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					64
Amount of Interest, Fees or Dividends Credited to Income					464
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,324
Gross Additions					1,276
Gross Reductions					0
Ending balance		$ 7,600			$ 7,600
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt One October 29, 2021
Schedule of Investments [Line Items]
Total Rate	[3]	9.25%			9.25%
Spread	[3]	6.50%			6.50%
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt One October 29,2021
Schedule of Investments [Line Items]
Total Rate	[6]							7.50%
Spread	[6]							6.50%
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt Two | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		13.75%			13.75%
Spread		11.00%			11.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					173
Amount of Interest, Fees or Dividends Credited to Income					2,035
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					20,996
Gross Additions					204
Gross Reductions					0
Ending balance		$ 21,200			$ 21,200
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt Two October 29, 2021
Schedule of Investments [Line Items]
Total Rate	[3]	13.75%			13.75%
Spread	[3]	11.00%			11.00%
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt Two October 29,2021
Schedule of Investments [Line Items]
Total Rate	[6]							12.00%
Spread	[6]							11.00%
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt January 04,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7],[22]							9.09%
Spread	[6],[7],[22]							8.09%
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt One March 24, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	11.21%			11.21%
Spread	[1],[2],[3]	7.50%			7.50%
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt Two January 04, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	11.19%			11.19%
Spread	[1],[2],[3]	7.50%			7.50%
Investment, Identifier [Axis]: Fortna Acquisition Co., Inc., Secured Debt July 23,2019
Schedule of Investments [Line Items]
Total Rate	[7]							5.09%
Spread	[7]							5.00%
Investment, Identifier [Axis]: Freeport Financial SBIC Fund LP, LP Interests (Freeport Financial SBIC Fund LP) | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					(52)		869
Amount of Interest, Fees or Dividends Credited to Income					2		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,078		5,264
Gross Additions					0		869
Gross Reductions					1,962		0
Ending balance		$ 4,116		6,133	4,116		6,133
Investment, Identifier [Axis]: Freeport Financial SBIC Fund LP, LP Interests (Freeport First Lien Loan Fund III LP) | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(57)		66
Amount of Interest, Fees or Dividends Credited to Income					309		613
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					7,231		10,321
Gross Additions					0		66
Gross Reductions					1,056		3,156
Ending balance		$ 6,175		$ 7,231	$ 6,175		$ 7,231
Investment, Identifier [Axis]: Fuse, LLC, Secured Debt June 30, 2019
Schedule of Investments [Line Items]
Total Rate	[8]	12.00%			12.00%
Investment, Identifier [Axis]: Fuse, LLC, Secured Debt June 30,2019
Schedule of Investments [Line Items]
Total Rate	[5]							12.00%
Investment, Identifier [Axis]: GFG Group, LLC., 12.00% Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							1,211
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							15,631
Gross Reductions							3,200
Ending balance				$ 12,431			12,431
Investment, Identifier [Axis]: GFG Group, LLC., Preferred Member Units | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					150		2,090
Amount of Interest, Fees or Dividends Credited to Income					417		460
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,990		0
Gross Additions					150		6,990
Gross Reductions					0		0
Ending balance		$ 7,140		6,990	$ 7,140		6,990
Investment, Identifier [Axis]: GFG Group, LLC., Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		9.00%			9.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(25)
Amount of Interest, Fees or Dividends Credited to Income					969
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					12,545
Gross Additions					25
Gross Reductions					825
Ending balance		$ 11,745			$ 11,745
Investment, Identifier [Axis]: GFG Group, LLC., Secured Debt March 31, 2021
Schedule of Investments [Line Items]
Total Rate		9.00%			9.00%
Investment, Identifier [Axis]: GFG Group, LLC., Secured Debt March 31,2021
Schedule of Investments [Line Items]
Total Rate								12.00%
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Member Units | Majority-owned 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					2,483		3,636
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					46,190		44,900
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 46,190		$ 44,900	$ 46,190		$ 44,900
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		10.56%		7.10%	10.56%		7.10%
Spread		8.00%		7.00%	8.00%		7.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(21)		0
Amount of Interest, Fees or Dividends Credited to Income					2,756		904
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					38,885		16,775
Gross Additions					1,629		0
Gross Reductions					21		0
Ending balance		$ 40,493		$ 16,775	$ 40,493		16,775
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt December 19, 2014
Schedule of Investments [Line Items]
Total Rate		10.56%			10.56%
Spread		8.00%			8.00%
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt December 19,2014
Schedule of Investments [Line Items]
Total Rate								8.10%
Spread								8.00%
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt October 18,2019
Schedule of Investments [Line Items]
Total Rate	[6],[7]							6.75%
Spread	[6],[7]							5.75%
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt One October 18, 2019
Schedule of Investments [Line Items]
Total Rate	[1],[3]	8.26%			8.26%
Spread	[1],[3]	6.50%			6.50%
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt Two October 18, 2019
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.62%			9.62%
Spread	[1],[3]	6.50%			6.50%
Investment, Identifier [Axis]: GS Operating, LLC, Secured Debt February 24,2020
Schedule of Investments [Line Items]
Total Rate	[6],[7]							8.00%
Spread	[6],[7]							6.50%
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt One September 30, 2022
Schedule of Investments [Line Items]
Spread	[1],[2],[3],[4]	6.00%			6.00%
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt Three September 30, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	9.59%			9.59%
Spread	[1],[2],[3]	6.00%			6.00%
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt Two September 30, 2022
Schedule of Investments [Line Items]
Spread	[1],[2],[3],[4]	6.00%			6.00%
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Member Units | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					(3,230)		32
Amount of Interest, Fees or Dividends Credited to Income					715		3,744
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					49,700		52,490
Gross Additions					0		2,880
Gross Reductions					3,230		0
Ending balance		$ 46,470		$ 55,370	$ 46,470		$ 55,370
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate				9.00%			9.00%
Spread				7.00%			7.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(31)
Amount of Interest, Fees or Dividends Credited to Income							1,435
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							19,838
Gross Additions							830
Gross Reductions							30
Ending balance				$ 20,638			20,638
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt June 24,2016
Schedule of Investments [Line Items]
Total Rate	[6]							9.50%
Spread	[6]							7.50%
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt One | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		10.63%			10.63%
Spread		8.00%			8.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					5
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					0
Gross Reductions					0
Ending balance		$ 0			$ 0
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt One June 24, 2016
Schedule of Investments [Line Items]
Spread	[3],[4]	8.00%			8.00%
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt Two | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		10.63%			10.63%
Spread		8.00%			8.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(4)
Amount of Interest, Fees or Dividends Credited to Income					1,722
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					21,598
Gross Additions					2,484
Gross Reductions					4
Ending balance		$ 24,078			$ 24,078
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt Two June 24, 2016
Schedule of Investments [Line Items]
Total Rate	[3]	10.63%			10.63%
Spread	[3]	8.00%			8.00%
Investment, Identifier [Axis]: Garreco, LLC, Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							800
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							1,410
Gross Additions							800
Gross Reductions							0
Ending balance				$ 2,210			$ 2,210
Investment, Identifier [Axis]: Garreco, LLC, Member Units | Other controlled investments
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					321
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,270
Gross Additions					0
Gross Reductions					280
Ending balance		$ 1,990			$ 1,990
Investment, Identifier [Axis]: Garreco, LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				9.00%			9.00%
Spread				8.00%			8.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							308
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							4,519
Gross Additions							0
Gross Reductions							0
Ending balance				$ 4,519			4,519
Investment, Identifier [Axis]: Garreco, LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		9.50%			9.50%
Spread		8.00%			8.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					290
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,196
Gross Additions					0
Gross Reductions					370
Ending balance		$ 3,826			$ 3,826
Investment, Identifier [Axis]: Garreco, LLC, Secured Debt July 15, 2013
Schedule of Investments [Line Items]
Total Rate	[3],[23]	9.50%			9.50%
Spread	[3],[23]	8.00%			8.00%
Investment, Identifier [Axis]: Garreco, LLC, Secured Debt July 15,2013
Schedule of Investments [Line Items]
Total Rate	[6],[24]							9.00%
Spread	[6],[24]							8.00%
Investment, Identifier [Axis]: GeoStabilization International (GSI), Secured Debt January 02, 2019
Schedule of Investments [Line Items]
Total Rate	[8]	8.07%			8.07%
Spread	[8]	5.25%			5.25%
Investment, Identifier [Axis]: GeoStabilization International (GSI), Secured Debt January 02,2019
Schedule of Investments [Line Items]
Total Rate	[5]							5.35%
Spread	[5]							5.25%
Investment, Identifier [Axis]: GoWireless Holdings, Inc., Secured Debt January 10,2018
Schedule of Investments [Line Items]
Total Rate	[5],[6]							7.50%
Spread	[5],[6]							6.50%
Investment, Identifier [Axis]: Grupo Hima San Pablo, Inc., Secured Debt March 07,2013
Schedule of Investments [Line Items]
Total Rate	[5],[6],[9],[11]							9.25%
Spread	[5],[6],[9],[11]							7.00%
Investment, Identifier [Axis]: Grupo Hima San Pablo, Inc., Secured Debt One March 07,2013
Schedule of Investments [Line Items]
Total Rate	[5],[9],[11]							13.75%
Investment, Identifier [Axis]: Grupo Hima San Pablo, Inc., Secured Debt Two March 07,2013
Schedule of Investments [Line Items]
Total Rate	[5],[11]							12.00%
Investment, Identifier [Axis]: Gulf Manufacturing, LLC, Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							1,130
Amount of Interest, Fees or Dividends Credited to Income							1,210
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							4,510
Gross Additions							1,130
Gross Reductions							0
Ending balance				$ 5,640			$ 5,640
Investment, Identifier [Axis]: Gulf Manufacturing, LLC, Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					170
Amount of Interest, Fees or Dividends Credited to Income					1,365
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,640
Gross Additions					170
Gross Reductions					0
Ending balance		$ 5,810			5,810
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Member Units One | Other controlled 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			0
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Member Units Two | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					(1,680)
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					5,600
Gross Reductions					1,680
Ending balance		$ 3,920			$ 3,920
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt April 29, 2016
Schedule of Investments [Line Items]
Total Rate	[11]							12.50%
PIK Rate	[11]							6.25%
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt One | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				10.50%			10.50%
Spread		9.50%		9.50%	9.50%		9.50%
PIK Rate				5.25%			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					7		17
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					257		250
Gross Additions					0		14
Gross Reductions					257		7
Ending balance		$ 0		$ 257	$ 0		$ 257
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt One September 29, 2017
Schedule of Investments [Line Items]
Spread	[3],[4]	9.50%			9.50%
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt September 29,2017
Schedule of Investments [Line Items]
Total Rate	[6],[11]							10.50%
Spread	[6],[11]							9.50%
PIK Rate	[6],[11]							5.25%
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt Three | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		12.50%			12.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(116)
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					2,400
Gross Reductions					116
Ending balance		$ 2,284			2,284
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt Two | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				12.50%			12.50%
PIK Rate				6.25%			6.25%
Amount of Realized Gain/(Loss)					(5,822)		$ 0
Amount of Unrealized Gain/(Loss)					3,848		(2,012)
Amount of Interest, Fees or Dividends Credited to Income					503		1,065
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					9,717		12,044
Gross Additions					0		849
Gross Reductions					9,717		2,431
Ending balance		$ 0		$ 10,462	$ 0		10,462
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt Two July 01, 2022
Schedule of Investments [Line Items]
Total Rate		12.50%			12.50%
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt December 21,2018
Schedule of Investments [Line Items]
Total Rate	[6],[7]							8.50%
Spread	[6],[7]							7.50%
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt One December 21, 2018
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	11.76%			11.76%
Spread	[1],[2],[3]	9.50%			9.50%
PIK Rate	[1],[2],[3]	5.75%			5.75%
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt Two December 21, 2018
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	11.76%			11.76%
Spread	[1],[2],[3]	9.50%			9.50%
PIK Rate	[1],[2],[3]	5.75%			5.75%
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt One August 01, 2022
Schedule of Investments [Line Items]
Spread	[1],[2],[3],[4]	6.50%			6.50%
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt Three August 01, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	9.52%			9.52%
Spread	[1],[2],[3]	6.50%			6.50%
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt Two August 01, 2022
Schedule of Investments [Line Items]
Spread	[1],[2],[3],[4]	6.50%			6.50%
Investment, Identifier [Axis]: HOWLCO LLC, Secured Debt August 11, 2021
Schedule of Investments [Line Items]
Total Rate	[3],[8],[25],[26]	8.96%			8.96%
Spread	[3],[8],[25],[26]	6.00%			6.00%
Investment, Identifier [Axis]: HOWLCO LLC, Secured Debt August 19,2021
Schedule of Investments [Line Items]
Total Rate	[5],[6],[27],[28]							7.00%
Spread	[5],[6],[27],[28]							6.00%
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (423 COR, LP) | 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					0
Gross Additions					1,400
Gross Reductions					0
Ending balance		$ 1,400			1,400
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (HPEP 3, L.P.) | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					779		0
Amount of Unrealized Gain/(Loss)					254		803
Amount of Interest, Fees or Dividends Credited to Income					(80)		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,712		3,258
Gross Additions					1,033		1,177
Gross Reductions					1,414		252
Ending balance		4,331		4,183	4,331		4,183
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (HPEP 4, L.P.) | 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					0
Gross Additions					1,896
Gross Reductions					0
Ending balance		1,896			1,896
Investment, Identifier [Axis]: Harrison Hydra-Gen, Ltd., Common Stock | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(250)		(1,920)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,530		5,450
Gross Additions					0		0
Gross Reductions					250		1,920
Ending balance		3,280		3,530	3,280		3,530
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt One December 02,2016
Schedule of Investments [Line Items]
Total Rate	[6],[27]							7.00%
Spread	[6],[27]							6.00%
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt Two December 02,2016
Schedule of Investments [Line Items]
Total Rate	[27]							8.00%
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Preferred Member Units One | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					4,400		270
Amount of Interest, Fees or Dividends Credited to Income					803		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					14,680		420
Gross Additions					4,400		270
Gross Reductions					0		0
Ending balance		19,080		690	19,080		690
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Preferred Member Units Two | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					230		5,130
Amount of Interest, Fees or Dividends Credited to Income					0		691
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					770		8,030
Gross Additions					230		5,130
Gross Reductions					0		0
Ending balance		$ 1,000		$ 13,160	$ 1,000		$ 13,160
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt One | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		8.38%		7.00%	8.38%		7.00%
Spread		6.00%		6.00%	6.00%		6.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					150		23
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,585		0
Gross Additions					597		2,585
Gross Reductions					0		0
Ending balance		$ 3,182		$ 2,585	$ 3,182		$ 2,585
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt One December 02, 2016
Schedule of Investments [Line Items]
Total Rate	[3]	8.38%			8.38%
Spread	[3]	6.00%			6.00%
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt Two | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		8.00%		9.00%	8.00%		9.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(4)		(25)
Amount of Interest, Fees or Dividends Credited to Income					2,145		1,366
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					34,800		18,400
Gross Additions					3,004		25
Gross Reductions					4		25
Ending balance		$ 37,800		$ 18,400	$ 37,800		18,400
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt Two December 02, 2016
Schedule of Investments [Line Items]
Total Rate		8.00%			8.00%
Investment, Identifier [Axis]: Heartland Dental, LLC, Secured Debt September 09, 2020,
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.62%			9.62%
Spread	[1],[3]	6.50%			6.50%
Investment, Identifier [Axis]: Heartland Dental, LLC, Secured Debt September 09,2020
Schedule of Investments [Line Items]
Total Rate	[6],[7]							7.50%
Spread	[6],[7]							6.50%
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Member Units | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					(990)		(1,620)
Amount of Interest, Fees or Dividends Credited to Income					17		180
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,210		5,080
Gross Additions					0		0
Gross Reductions					990		1,620
Ending balance		$ 2,220		$ 3,460	$ 2,220		$ 3,460
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Unsecured Convertible Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		8.00%		8.00%	8.00%		8.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(210)		0
Amount of Interest, Fees or Dividends Credited to Income					182		182
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,960		2,900
Gross Additions					0		0
Gross Reductions					210		0
Ending balance		$ 2,750		$ 2,900	$ 2,750		$ 2,900
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Unsecured Convertible Debt May 01, 2017
Schedule of Investments [Line Items]
Total Rate		8.00%			8.00%
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Unsecured Convertible Debt May 01,2017
Schedule of Investments [Line Items]
Total Rate								8.00%
Investment, Identifier [Axis]: Hybrid Promotions, LLC, Secured Debt June 30, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	10.33%			10.33%
Spread	[1],[3]	8.25%			8.25%
Investment, Identifier [Axis]: Hybrid Promotions, LLC, Secured Debt June 30,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							9.25%
Spread	[6],[7]							8.25%
Investment, Identifier [Axis]: I-45 SLF LLC, Member Units (Fully diluted 20.0%; 21.75% profits interest) | Affiliate investments
Schedule of Investments [Line Items]
Diluted, percentage		20.00%			20.00%
Profits, percentage		21.75%			21.75%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(1,880)
Amount of Interest, Fees or Dividends Credited to Income					1,499
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					14,387
Gross Additions					0
Gross Reductions					1,880
Ending balance		$ 12,507			$ 12,507
Investment, Identifier [Axis]: I-45 SLF LLC, Member Units (Fully diluted 20.0%; 24.40% profits interest) | Affiliate investments
Schedule of Investments [Line Items]
Diluted, percentage				20.00%			20.00%
Profits, percentage				24.40%			24.40%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							413
Amount of Interest, Fees or Dividends Credited to Income							1,386
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							15,787
Gross Additions							1,215
Gross Reductions							2,000
Ending balance				$ 15,002			15,002
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt July 30,2021
Schedule of Investments [Line Items]
Total Rate	[5],[6]							6.75%
Spread	[5],[6]							5.75%
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt One July 30, 2021
Schedule of Investments [Line Items]
Total Rate	[2],[3],[8]	8.41%			8.41%
Spread	[2],[3],[8]	5.75%			5.75%
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt Two July 30, 2021
Schedule of Investments [Line Items]
Total Rate	[2],[3],[8]	8.23%			8.23%
Spread	[2],[3],[8]	5.75%			5.75%
Investment, Identifier [Axis]: INW Manufacturing, LLC, Secured Debt May 19, 2021
Schedule of Investments [Line Items]
Total Rate	[3],[8]	8.71%			8.71%
Spread	[3],[8]	5.75%			5.75%
Investment, Identifier [Axis]: INW Manufacturing, LLC, Secured Debt May 19,2021
Schedule of Investments [Line Items]
Total Rate	[5],[6]							6.50%
Spread	[5],[6]							5.75%
Investment, Identifier [Axis]: Implus Footcare, LLC, Secured Debt June 01, 2017
Schedule of Investments [Line Items]
Total Rate	[1],[3]	10.25%			10.25%
Spread	[1],[3]	7.75%			7.75%
PIK Rate	[1],[3]	0.25%			0.25%
Investment, Identifier [Axis]: Implus Footcare, LLC, Secured Debt June 01,2017
Schedule of Investments [Line Items]
Total Rate	[6],[7]							8.75%
Spread	[6],[7]							7.75%
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Preferred Stock (non-voting) One December 10, 2020
Schedule of Investments [Line Items]
Total Rate	[1],[10]	6.00%			6.00%
PIK Rate	[1],[10]	6.00%			6.00%
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Preferred Stock (non-voting) One December 10,2020
Schedule of Investments [Line Items]
Total Rate	[7]							6.00%
PIK Rate	[7]							6.00%
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt August 20,2020
Schedule of Investments [Line Items]
Total Rate	[7],[29]							7.20%
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt December 10,2020
Schedule of Investments [Line Items]
Total Rate	[7]							6.00%
PIK Rate	[7]							6.00%
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt One August 20, 2020
Schedule of Investments [Line Items]
Total Rate	[1],[30]	11.26%			11.26%
PIK Rate	[1],[30]	11.26%			11.26%
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt Two December 10, 2020
Schedule of Investments [Line Items]
Total Rate	[1],[10]	6.00%			6.00%
PIK Rate	[1],[10]	6.00%			6.00%
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units January 31,2018
Schedule of Investments [Line Items]
Total Rate	[7],[14],[16]							10.00%
PIK Rate	[7],[14],[16]							10.00%
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units May 17,2019
Schedule of Investments [Line Items]
Total Rate	[7],[14],[16]							20.00%
PIK Rate	[7],[14],[16]							20.00%
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units One January 31, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[17],[18]	10.00%			10.00%
PIK Rate	[1],[17],[18]	10.00%			10.00%
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units Two May 17, 2019
Schedule of Investments [Line Items]
Total Rate	[1],[17],[18]	20.00%			20.00%
PIK Rate	[1],[17],[18]	20.00%			20.00%
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt August 13,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							7.75%
Spread	[6],[7]							6.75%
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt One August 13, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.88%			9.88%
Spread	[1],[3]	6.75%			6.75%
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt Two August 13, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.69%			9.69%
Spread	[1],[3]	6.75%			6.75%
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt November 01,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							7.00%
Spread	[6],[7]							6.00%
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt One November 01, 2021
Schedule of Investments [Line Items]
Spread	[1],[3],[4]	5.75%			5.75%
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt Two November 01, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.42%			9.42%
Spread	[1],[3]	5.75%			5.75%
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt One December 09,2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	12.32%			12.32%
Spread	[1],[3]	10.00%			10.00%
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt Two August 07,2019
Schedule of Investments [Line Items]
Total Rate	[1],[3],[10]	10.52%			10.52%
Spread	[1],[3],[10]	7.00%			7.00%
PIK Rate	[1],[3],[10]	1.00%			1.00%
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt August 07,2019
Schedule of Investments [Line Items]
Total Rate	[6],[7],[9]							9.75%
Spread	[6],[7],[9]							7.00%
PIK Rate	[6],[7],[9]							1.00%
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt December 09,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							11.75%
Spread	[6],[7]							10.00%
Investment, Identifier [Axis]: Intermedia Holdings, Inc., Secured Debt August 03, 2018
Schedule of Investments [Line Items]
Total Rate	[3],[8]	9.12%			9.12%
Spread	[3],[8]	6.00%			6.00%
Investment, Identifier [Axis]: Intermedia Holdings, Inc., Secured Debt August 03,2018
Schedule of Investments [Line Items]
Total Rate	[5],[6]							7.00%
Spread	[5],[6]							6.00%
Investment, Identifier [Axis]: Investments transferred from other 1940 Act classification during the period | Control 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					985		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					41,748		0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0		0	0		0
Investment, Identifier [Axis]: Investments transferred from other 1940 Act classification during the period | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					139		0
Amount of Interest, Fees or Dividends Credited to Income					1,302		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					32,597		(12,263)
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0		0	$ 0		0
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt August 28,2019
Schedule of Investments [Line Items]
Total Rate	[6],[7]							8.00%
Spread	[6],[7]							6.50%
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt One August 28, 2019
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.42%			9.42%
Spread	[1],[3]	6.50%			6.50%
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt Two August 28, 2019
Schedule of Investments [Line Items]
Total Rate	[1],[3]	8.75%			8.75%
Spread	[1],[3]	6.50%			6.50%
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Common Stock | 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							0
Gross Additions							1,027
Gross Reductions							0
Ending balance				$ 1,027			$ 1,027
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt September 01,2021
Schedule of Investments [Line Items]
Total Rate								12.50%
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt Four | Affiliate investments
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					1,926
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					19,805
Gross Additions					30
Gross Reductions					0
Ending balance		$ 19,835			$ 19,835
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt Four November 15, 2021
Schedule of Investments [Line Items]
Total Rate		12.50%			12.50%
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt One | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		12.50%		12.50%	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					443		98
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,557		0
Gross Additions					7		3,168
Gross Reductions					0		0
Ending balance		$ 4,564		$ 3,168	$ 4,564		$ 3,168
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt One August 02, 2021
Schedule of Investments [Line Items]
Total Rate		12.50%			12.50%
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt One August 03,2021
Schedule of Investments [Line Items]
Total Rate								13.00%
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt Three | Affiliate investments
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					848
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					8,944
Gross Additions					0
Gross Reductions					0
Ending balance		$ 8,944			$ 8,944
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt Three August 03,2021
Schedule of Investments [Line Items]
Total Rate								12.50%
PIK Rate								12.50%
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt Three November 15, 2021
Schedule of Investments [Line Items]
Total Rate		12.50%			12.50%
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt Two | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		12.50%		13.00%	12.50%		13.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					308		191
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,170		0
Gross Additions					4		4,555
Gross Reductions					0		0
Ending balance		$ 3,174		$ 4,555	$ 3,174		4,555
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt Two August 03,2021
Schedule of Investments [Line Items]
Total Rate								12.50%
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt Two September 01, 2021
Schedule of Investments [Line Items]
Total Rate		12.50%			12.50%
Investment, Identifier [Axis]: Iron-Main Investments, LLC,Common Stock | 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					1,798
Gross Additions					0
Gross Reductions					0
Ending balance		$ 1,798			$ 1,798
Investment, Identifier [Axis]: Isagenix International, LLC, Secured Debt June 21, 2018
Schedule of Investments [Line Items]
Total Rate	[3],[8]	9.93%			9.93%
Spread	[3],[8]	7.75%			7.75%
PIK Rate	[3],[8]	9.93%			9.93%
Investment, Identifier [Axis]: Isagenix International, LLC, Secured Debt June 21,2018
Schedule of Investments [Line Items]
Total Rate	[5],[6]							6.75%
Spread	[5],[6]							5.75%
Investment, Identifier [Axis]: J&J Services, Inc., Preferred Stock | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							2,720
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							12,680
Gross Additions							2,720
Gross Reductions							0
Ending balance				$ 15,400			$ 15,400
Investment, Identifier [Axis]: J&J Services, Inc., Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				11.50%			11.50%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(30)
Amount of Interest, Fees or Dividends Credited to Income							1,084
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							12,800
Gross Additions							30
Gross Reductions							2,030
Ending balance				$ 10,800			10,800
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt December 22,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							7.00%
Spread	[6],[7]							6.00%
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt One December 22, 2021
Schedule of Investments [Line Items]
Spread	[1],[3],[4]	6.00%			6.00%
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt Two December 22, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	8.26%			8.26%
Spread	[1],[3]	6.00%			6.00%
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt May 26,2015
Schedule of Investments [Line Items]
Total Rate	[6],[7]							8.00%
Spread	[6],[7]							7.00%
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt November 08, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	8.75%			8.75%
Spread	[1],[3]	6.50%			6.50%
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Member Units | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					2,550		3,640
Amount of Interest, Fees or Dividends Credited to Income					1,996		1,264
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					12,420		7,620
Gross Additions					2,550		3,640
Gross Reductions					0		0
Ending balance		$ 14,970		$ 11,260	$ 14,970		$ 11,260
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		12.25%		10.00%	12.25%		10.00%
Spread		6.75%		6.75%	6.75%		6.75%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(6)		(10)
Amount of Interest, Fees or Dividends Credited to Income					207		244
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,550		3,400
Gross Additions					6		10
Gross Reductions					106		660
Ending balance		$ 2,450		$ 2,750	$ 2,450		2,750
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt November 14, 2006
Schedule of Investments [Line Items]
Total Rate	[3]	12.25%			12.25%
Spread	[3]	6.75%			6.75%
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt November 14,2006
Schedule of Investments [Line Items]
Total Rate	[6]							10.00%
Spread	[6]							6.75%
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt August 21,2019
Schedule of Investments [Line Items]
Total Rate	[5],[6]							7.00%
Spread	[5],[6]							6.00%
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt November 15,2021
Schedule of Investments [Line Items]
Total Rate	[5]							15.00%
PIK Rate	[5]							15.00%
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt One November 15, 2021
Schedule of Investments [Line Items]
Total Rate	[8]	15.00%			15.00%
Spread	[8]	15.00%			15.00%
PIK Rate	[8]	15.00%			15.00%
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt Two August 21, 2019
Schedule of Investments [Line Items]
Total Rate	[8],[10]	19.75%			19.75%
PIK Rate	[8],[10]	19.75%			19.75%
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Preferred Equity | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					2,730
Amount of Interest, Fees or Dividends Credited to Income					808
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,150
Gross Additions					2,730
Gross Reductions					0
Ending balance		$ 5,880			$ 5,880
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt December 10,2021
Schedule of Investments [Line Items]
Total Rate	[6]							13.00%
Spread	[6]							11.50%
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt One | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		14.13%			14.13%
Spread		11.50%			11.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					10
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					(18)
Gross Additions					3
Gross Reductions					0
Ending balance		$ (15)			$ (15)
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt One December 10, 2021
Schedule of Investments [Line Items]
Spread	[3],[4]	11.50%			11.50%
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt Two | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		14.13%			14.13%
Spread		11.50%			11.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					84
Amount of Interest, Fees or Dividends Credited to Income					1,109
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					11,362
Gross Additions					114
Gross Reductions					1,477
Ending balance		$ 9,999			$ 9,999
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt Two December 10, 2021
Schedule of Investments [Line Items]
Total Rate	[3]	14.13%			14.13%
Spread	[3]	11.50%			11.50%
Investment, Identifier [Axis]: JorVet Holdings, LLC, Common Stock | Other controlled 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					468
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			$ 10,741
Investment, Identifier [Axis]: JorVet Holdings, LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					1,881
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					25,419
Gross Reductions					0
Ending balance		$ 25,419			$ 25,419
Investment, Identifier [Axis]: JorVet Holdings, LLC, Secured Debt March 28, 2022
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Investment, Identifier [Axis]: KBK Industries, LLC, Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					770		420
Amount of Interest, Fees or Dividends Credited to Income					1,007		456
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					13,620		13,200
Gross Additions					770		420
Gross Reductions					0		0
Ending balance		$ 14,390		13,620	$ 14,390		13,620
Investment, Identifier [Axis]: KMS, LLC, Secured Debt October 04,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							8.25%
Spread	[6],[7]							7.25%
Investment, Identifier [Axis]: KMS, LLC, Secured Debt One October 04, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.56%			9.56%
Spread	[1],[3]	7.25%			7.25%
Investment, Identifier [Axis]: KMS, LLC, Secured Debt Two October 04, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.56%			9.56%
Spread	[1],[3]	7.25%			7.25%
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units One | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							50
Amount of Interest, Fees or Dividends Credited to Income							75
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							1,160
Gross Additions							50
Gross Reductions							0
Ending balance				1,210			1,210
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units Two | Majority-owned 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							12,240
Gross Additions							0
Gross Reductions							0
Ending balance				$ 12,240			$ 12,240
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt One | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		11.50%		11.50%	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					1,818		1,915
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					20,324		22,269
Gross Additions					37		44
Gross Reductions					0		2,000
Ending balance		$ 20,361		$ 20,313	$ 20,361		$ 20,313
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt One October 31, 2018
Schedule of Investments [Line Items]
Total Rate		11.50%			11.50%
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt One October 31,2018
Schedule of Investments [Line Items]
Total Rate								11.50%
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt Two | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		9.00%		9.00%	9.00%		9.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					265		266
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,876		3,909
Gross Additions					1		0
Gross Reductions					26		24
Ending balance		$ 3,851		$ 3,885	$ 3,851		3,885
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt Two October 31, 2018
Schedule of Investments [Line Items]
Total Rate		9.00%			9.00%
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt Two October 31,2018
Schedule of Investments [Line Items]
Total Rate								9.00%
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC,, Member Units One | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(3,060)
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					3,060
Ending balance		$ 9,250			9,250
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC,, Member Units Two | Majority-owned 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					84
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			$ 2,460
Investment, Identifier [Axis]: Klein Hersh, LLC, Secured Debt November 13,2020
Schedule of Investments [Line Items]
Total Rate	[6],[7]							7.75%
Spread	[6],[7]							7.00%
Investment, Identifier [Axis]: Kore Wireless Group Inc., Secured Debt December 11, 2022
Schedule of Investments [Line Items]
Total Rate	[8],[25]	9.17%			9.17%
Spread	[8],[25]	5.50%			5.50%
Investment, Identifier [Axis]: Kore Wireless Group Inc., Secured Debt December 31,2018
Schedule of Investments [Line Items]
Total Rate	[5],[27]							5.72%
Spread	[5],[27]							5.50%
Investment, Identifier [Axis]: L.F. Manufacturing Holdings, LLC, Member Units | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							50
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							2,050
Gross Additions							50
Gross Reductions							0
Ending balance				$ 2,100			$ 2,100
Investment, Identifier [Axis]: L.F. Manufacturing Holdings, LLC, Preferred Member Units (non-voting) | Affiliate investments
Schedule of Investments [Line Items]
Total Rate				14.00%			14.00%
PIK Rate				14.00%			14.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					9		10
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					107		93
Gross Additions					10		10
Gross Reductions					117		0
Ending balance		$ 0		$ 103	$ 0		103
Investment, Identifier [Axis]: L.F. Manufacturing Holdings, LLC, Preferred Member Units (non-voting) January 01,2019
Schedule of Investments [Line Items]
Total Rate	[7],[14]							14.00%
PIK Rate	[7],[14]							14.00%
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt May 02,2019
Schedule of Investments [Line Items]
Total Rate	[6],[7]							8.25%
Spread	[6],[7]							7.25%
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt One May 02, 2019
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	10.20%			10.20%
Spread	[1],[2],[3]	7.25%			7.25%
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt Three May 12, 2019
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	9.13%			9.13%
Spread	[1],[2],[3]	7.25%			7.25%
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt Two May 02, 2019
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	9.81%			9.81%
Spread	[1],[2],[3]	7.25%			7.25%
Investment, Identifier [Axis]: LLFlex, LLC, Secured Debt August 16, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	11.28%			11.28%
Spread	[1],[3]	9.00%			9.00%
Investment, Identifier [Axis]: LLFlex, LLC, Secured Debt August 16,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							10.00%
Spread	[6],[7]							9.00%
Investment, Identifier [Axis]: LaserAway Intermediate Holdings II, LLC, Secured Debt October 18,2021
Schedule of Investments [Line Items]
Total Rate	[5],[6]							6.50%
Spread	[5],[6]							5.75%
Investment, Identifier [Axis]: Lightbox Holdings, L.P., Secured Debt May 09, 2019
Schedule of Investments [Line Items]
Total Rate	[8]	7.96%			7.96%
Spread	[8]	5.00%			5.00%
Investment, Identifier [Axis]: Lightbox Holdings, L.P., Secured Debt May 23, 2019
Schedule of Investments [Line Items]
Total Rate	[5]							5.22%
Spread	[5]							5.00%
Investment, Identifier [Axis]: Logix Acquisition Company, LLC, Secured Debt January 08, 2018
Schedule of Investments [Line Items]
Total Rate	[1],[3]	8.87%			8.87%
Spread	[1],[3]	5.75%			5.75%
Investment, Identifier [Axis]: Logix Acquisition Company, LLC, Secured Debt January 08,2018
Schedule of Investments [Line Items]
Total Rate	[6],[7]							6.75%
Spread	[6],[7]							5.75%
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt January 28,2021
Schedule of Investments [Line Items]
Total Rate	[5],[6]							7.00%
Spread	[5],[6]							6.00%
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt One January 28,2021
Schedule of Investments [Line Items]
Total Rate	[2],[3],[8],[31]	9.08%			9.08%
Spread	[2],[3],[8],[31]	6.00%			6.00%
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt Two January 28,2021
Schedule of Investments [Line Items]
Total Rate	[2],[3],[8]	9.70%			9.70%
Spread	[2],[3],[8]	6.00%			6.00%
Investment, Identifier [Axis]: MH Corbin Holding LLC, Preferred Member Units | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(2,370)
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							2,370
Gross Additions							0
Gross Reductions							2,370
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: MH Corbin Holding LLC, Preferred Member Units One | Majority-owned 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			0
Investment, Identifier [Axis]: MH Corbin Holding LLC, Preferred Member Units Two | Majority-owned 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			$ 0
Investment, Identifier [Axis]: MH Corbin Holding LLC, Secured Debt | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		13.00%		13.00%	13.00%		13.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(1,220)		(2,059)
Amount of Interest, Fees or Dividends Credited to Income					795		854
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,934		8,280
Gross Additions					9		25
Gross Reductions					3,234		2,299
Ending balance		$ 2,709		$ 6,006	$ 2,709		6,006
Investment, Identifier [Axis]: MH Corbin Holding LLC, Secured Debt August 31,2015
Schedule of Investments [Line Items]
Total Rate								13.00%
Investment, Identifier [Axis]: MH Corbin Holding LLC, Secured Debt August 31, 2015
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%
Investment, Identifier [Axis]: MS Private Loan Fund I, LP, Unsecured Debt February 11,2021
Schedule of Investments [Line Items]
Total Rate	[27],[32]							5.00%
Investment, Identifier [Axis]: MS Private Loan Fund, LP Interests | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					20		0
Amount of Interest, Fees or Dividends Credited to Income					437		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,581		0
Gross Additions					11,770		1,000
Gross Reductions					0		0
Ending balance		$ 14,351		$ 1,000	14,351		$ 1,000
Investment, Identifier [Axis]: MS Private Loan Fund, Unsecured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				5.00%			5.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							642
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							33,866
Gross Reductions							3,575
Ending balance				$ 30,291			30,291
Investment, Identifier [Axis]: MSC Adviser I, LLC, Member Units | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(27,910)		11,320
Amount of Interest, Fees or Dividends Credited to Income					5,620		3,908
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					140,400		116,760
Gross Additions					0		11,320
Gross Reductions					27,910		0
Ending balance		112,490		$ 128,080	112,490		$ 128,080
Investment, Identifier [Axis]: MSC Income Fund Inc., Unsecured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				5.00%			5.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							352
Amount of Interest, Fees or Dividends Credited to Income							1,603
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							60,000
Gross Reductions							0
Ending balance				$ 60,000			$ 60,000
Investment, Identifier [Axis]: MSC Income Fund, Inc., Common Equity | Other controlled investments
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					15
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					761
Gross Reductions					0
Ending balance		$ 761			$ 761
Investment, Identifier [Axis]: Mac Lean-Fogg Company, Preferred Stock October 01, 2019
Schedule of Investments [Line Items]
Total Rate	[1]	13.75%			13.75%
PIK Rate	[1]	9.25%			9.25%
Investment, Identifier [Axis]: Mac Lean-Fogg Company, Preferred Stock October 01,2019
Schedule of Investments [Line Items]
Total Rate	[7]							13.75%
PIK Rate	[7]							9.25%
Investment, Identifier [Axis]: Mac Lean-Fogg Company, Secured Debt April 22,2019
Schedule of Investments [Line Items]
Total Rate	[6],[7]							5.88%
Spread	[6],[7]							5.25%
Investment, Identifier [Axis]: Mac Lean-Fogg Company, Secured Debt One April 22, 2019
Schedule of Investments [Line Items]
Total Rate	[1],[3]	7.87%			7.87%
Spread	[1],[3]	4.75%			4.75%
Investment, Identifier [Axis]: Mac Lean-Fogg Company, Secured Debt Two April 22, 2019
Schedule of Investments [Line Items]
Total Rate	[1],[3]	7.87%			7.87%
Spread	[1],[3]	4.75%			4.75%
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt March 15,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							8.00%
Spread	[6],[7]							7.25%
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt One March 15, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	10.42%			10.42%
Spread	[1],[3]	7.25%			7.25%
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt Two March 15, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	11.09%			11.09%
Spread	[1],[3]	7.25%			7.25%
Investment, Identifier [Axis]: Market Force Information, LLC, Member Units | Majority-owned 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			$ 0
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt One | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		13.38%		12.00%	13.38%		12.00%
Spread		11.00%		11.00%	11.00%		11.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					374		282
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,400		1,600
Gross Additions					1,600		1,800
Gross Reductions					0		0
Ending balance		$ 5,000		$ 3,400	$ 5,000		$ 3,400
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt One July 28, 2017
Schedule of Investments [Line Items]
Total Rate	[3]	13.38%			13.38%
Spread	[3]	11.00%			11.00%
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt One July 28,2017
Schedule of Investments [Line Items]
Total Rate	[6]							12.00%
Spread	[6]							11.00%
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt Two | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		12.00%		12.00%	12.00%		12.00%
PIK Rate		12.00%		12.00%	12.00%		12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(6,065)		(2,403)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					8,936		13,562
Gross Additions					0		0
Gross Reductions					6,065		2,403
Ending balance		$ 2,871		$ 11,159	$ 2,871		11,159
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt Two July 28, 2017
Schedule of Investments [Line Items]
Total Rate	[10]	12.00%			12.00%
PIK Rate	[10]	12.00%			12.00%
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt Two July 28,2017
Schedule of Investments [Line Items]
Total Rate	[11]							12.00%
PIK Rate	[11]							12.00%
Investment, Identifier [Axis]: Meisler Operating LLC, Common Stock | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							17,048
Amount of Unrealized Gain/(Loss)							(7,414)
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							16,010
Gross Additions							0
Gross Reductions							16,010
Ending balance				0			0
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt One April 04, 2022
Schedule of Investments [Line Items]
Spread	[1],[2],[3],[4]	6.25%			6.25%
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt Two April 04, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	8.36%			8.36%
Spread	[1],[2],[3]	6.25%			6.25%
Investment, Identifier [Axis]: Mills Fleet Farm Group, LLC, Secured Debt October 24, 2018
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.06%			9.06%
Spread	[1],[3]	6.25%			6.25%
Investment, Identifier [Axis]: Mills Fleet Farm Group, LLC, Secured Debt October 24,2018
Schedule of Investments [Line Items]
Total Rate	[6],[7]							7.25%
Spread	[6],[7]							6.25%
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt One May 24, 2022
Schedule of Investments [Line Items]
Spread	[1],[3],[4],[25],[26]	7.00%			7.00%
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt Three May 24, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[3],[25],[26]	8.51%			8.51%
Spread	[1],[3],[25],[26]	7.00%			7.00%
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt Two May 24, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[3],[25],[26]	9.43%			9.43%
Spread	[1],[3],[25],[26]	7.00%			7.00%
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Common Stock | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					11,860		(1,820)
Amount of Interest, Fees or Dividends Credited to Income					2,860		548
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					8,840		8,990
Gross Additions					11,860		0
Gross Reductions					0		1,820
Ending balance		$ 20,700		$ 7,170	$ 20,700		$ 7,170
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							622
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							6,723
Gross Additions							7
Gross Reductions							24
Ending balance				$ 6,706			6,706
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt August 18,2014
Schedule of Investments [Line Items]
Total Rate								12.00%
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt One | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		10.00%			10.00%
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			$ 0
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt Two | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(1)
Amount of Interest, Fees or Dividends Credited to Income					460
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,378
Gross Additions					1
Gross Reductions					633
Ending balance		$ 5,746			$ 5,746
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt Two August 18, 2014
Schedule of Investments [Line Items]
Total Rate		10.00%			10.00%
Investment, Identifier [Axis]: NAPCO Precast, LLC, Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					(2,380)		(2,540)
Amount of Interest, Fees or Dividends Credited to Income					4		1,823
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					13,560		16,100
Gross Additions					0		0
Gross Reductions					2,380		2,540
Ending balance		$ 11,180		13,560	$ 11,180		13,560
Investment, Identifier [Axis]: NBG Acquisition Inc, Secured Debt April 28, 2017
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.67%			9.67%
Spread	[1],[3]	5.50%			5.50%
Investment, Identifier [Axis]: NBG Acquisition Inc, Secured Debt April 28,2017
Schedule of Investments [Line Items]
Total Rate	[5],[6]							6.50%
Spread	[5],[6]							5.50%
Investment, Identifier [Axis]: NNE Partners, LLC, Secured Debt March 02, 2017
Schedule of Investments [Line Items]
Total Rate	[1]	10.86%			10.86%
Spread	[1]	9.25%			9.25%
Investment, Identifier [Axis]: NNE Partners, LLC, Secured Debt March 02,2017
Schedule of Investments [Line Items]
Total Rate	[7]							9.37%
Spread	[7]							4.75%
PIK Rate	[7]							4.50%
Investment, Identifier [Axis]: NRI Clinical Research, LLC, Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							8,786
Amount of Unrealized Gain/(Loss)							(4,835)
Amount of Interest, Fees or Dividends Credited to Income							2,805
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							5,600
Gross Additions							0
Gross Reductions							5,600
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: NRI Clinical Research, LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				9.00%			9.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(48)
Amount of Interest, Fees or Dividends Credited to Income							380
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							5,620
Gross Additions							48
Gross Reductions							5,668
Ending balance				$ 0			0
Investment, Identifier [Axis]: NRI Clinical Research, LLC, Warrants | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(1,238)
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							1,490
Gross Additions							0
Gross Reductions							1,490
Ending balance				0			0
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							3,619
Amount of Interest, Fees or Dividends Credited to Income							(45)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							2,821
Gross Additions							3,619
Gross Reductions							0
Ending balance				$ 6,440			$ 6,440
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units One | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(1,585)
Amount of Interest, Fees or Dividends Credited to Income					449
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,200
Gross Additions					0
Gross Reductions					1,585
Ending balance		$ 4,615			4,615
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units Two | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					(65)
Amount of Interest, Fees or Dividends Credited to Income					13
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					240
Gross Additions					0
Gross Reductions					65
Ending balance		$ 175			$ 175
Investment, Identifier [Axis]: NRP Jones, LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		12.00%		12.00%	12.00%		12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					189		189
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	$ 2,080		2,080
Investment, Identifier [Axis]: NRP Jones, LLC, Secured Debt December 21, 2017
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Investment, Identifier [Axis]: NRP Jones, LLC, Secured Debt December 21,2017
Schedule of Investments [Line Items]
Total Rate								12.00%
Investment, Identifier [Axis]: NTM Acquisition Corp., Secured Debt July 12, 2016
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.50%			9.50%
Spread	[1],[3]	6.25%			6.25%
PIK Rate	[1],[3]	1.00%			1.00%
Investment, Identifier [Axis]: NTM Acquisition Corp., Secured Debt July 12,2016
Schedule of Investments [Line Items]
Total Rate	[5],[6]							8.25%
Spread	[5],[6]							6.25%
PIK Rate	[5],[6]							1.00%
Investment, Identifier [Axis]: NWN Corporation, Secured Debt May 07,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							7.50%
Spread	[6],[7]							6.50%
Investment, Identifier [Axis]: NWN Corporation, Secured Debt One May 07, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.27%			9.27%
Spread	[1],[3]	6.50%			6.50%
Investment, Identifier [Axis]: NWN Corporation, Secured Debt Two May 07, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.37%			9.37%
Spread	[1],[3]	6.50%			6.50%
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC (NVS), Preferred Member Units | Other controlled 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					7,700		6,500
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 7,700		$ 6,500	$ 7,700		$ 6,500
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC (NVS), Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							979
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							10,395
Gross Additions							13
Gross Reductions							0
Ending balance				$ 10,408			10,408
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC (NVS), Secured Debt One | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		8.71%			8.71%
Spread		7.00%			7.00%
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			$ 0
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC (NVS), Secured Debt Three | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					71
Amount of Interest, Fees or Dividends Credited to Income					972
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					10,412
Gross Additions					88
Gross Reductions					0
Ending balance		$ 10,500			$ 10,500
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC (NVS), Secured Debt Two | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					121
Amount of Interest, Fees or Dividends Credited to Income					1,146
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,829
Gross Additions					13,452
Gross Reductions					0
Ending balance		$ 18,281			$ 18,281
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt One December 31,2020
Schedule of Investments [Line Items]
Total Rate								12.00%
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt Three December 31, 2020
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt Two December 31, 2020
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt Two December 31,2020
Schedule of Investments [Line Items]
Total Rate								12.00%
Investment, Identifier [Axis]: NexRev LLC, Preferred Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					(2,913)		1,810
Amount of Interest, Fees or Dividends Credited to Income					60		60
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,690		1,470
Gross Additions					1,333		1,810
Gross Reductions					2,913		0
Ending balance		$ 1,110		$ 3,280	$ 1,110		$ 3,280
Investment, Identifier [Axis]: NexRev LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				11.00%			11.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(1,351)
Amount of Interest, Fees or Dividends Credited to Income							1,417
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							16,727
Gross Additions							28
Gross Reductions							2,005
Ending balance				$ 14,750			14,750
Investment, Identifier [Axis]: NexRev LLC, Secured Debt February 28,2018
Schedule of Investments [Line Items]
Total Rate								11.00%
Investment, Identifier [Axis]: NexRev LLC, Secured Debt One | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		11.00%			11.00%
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					800
Gross Additions					0
Gross Reductions					640
Ending balance		$ 160			$ 160
Investment, Identifier [Axis]: NexRev LLC, Secured Debt One February 28, 2018
Schedule of Investments [Line Items]
Total Rate		11.00%			11.00%
Investment, Identifier [Axis]: NexRev LLC, Secured Debt Two | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		11.00%			11.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(928)
Amount of Interest, Fees or Dividends Credited to Income					1,560
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					13,245
Gross Additions					0
Gross Reductions					4,192
Ending balance		$ 9,053			$ 9,053
Investment, Identifier [Axis]: NexRev LLC, Secured Debt Two February 28, 2018
Schedule of Investments [Line Items]
Total Rate		11.00%			11.00%
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt December 18,2019
Schedule of Investments [Line Items]
Total Rate	[6],[7]							7.25%
Spread	[6],[7]							6.25%
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt One December 18, 2019
Schedule of Investments [Line Items]
Spread	[1],[3],[4]	6.75%			6.75%
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt Three December 18, 2019
Schedule of Investments [Line Items]
Total Rate	[1],[3]	8.53%			8.53%
Spread	[1],[3]	6.75%			6.75%
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt Two December 18, 2019
Schedule of Investments [Line Items]
Spread	[1],[3],[4]	6.75%			6.75%
Investment, Identifier [Axis]: Northstar Group Services, Inc, Secured Debt November 01, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	8.62%			8.62%
Spread	[1],[3]	5.50%			5.50%
Investment, Identifier [Axis]: Northstar Group Services, Inc, Secured Debt November 01,2021
Schedule of Investments [Line Items]
Total Rate	[5],[6]							6.50%
Spread	[5],[6]							5.50%
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					(3,300)		2,720
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					13,500		10,780
Gross Additions					0		2,720
Gross Reductions					3,300		0
Ending balance		$ 10,200		$ 13,500	$ 10,200		$ 13,500
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt One | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		9.13%		10.50%	9.13%		10.50%
Spread		6.50%			6.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		17
Amount of Interest, Fees or Dividends Credited to Income					208		1,507
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,720		17,193
Gross Additions					2,679		47
Gross Reductions					0		0
Ending balance		$ 4,399		$ 17,240	$ 4,399		$ 17,240
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt One January 31, 2017
Schedule of Investments [Line Items]
Total Rate	[3]	9.13%			9.13%
Spread	[3]	6.50%			6.50%
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt One January 31,2017
Schedule of Investments [Line Items]
Total Rate	[6]							7.50%
Spread	[6]							6.50%
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt Two | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		12.00%		7.50%	12.00%		7.50%
Spread				6.50%			6.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(4)		0
Amount of Interest, Fees or Dividends Credited to Income					1,612		25
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					17,240		0
Gross Additions					1,175		2,000
Gross Reductions					4		400
Ending balance		$ 18,411		$ 1,600	$ 18,411		1,600
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt Two January 31, 2017
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt Two January 31,2017
Schedule of Investments [Line Items]
Total Rate								11.00%
Investment, Identifier [Axis]: OMi Holdings, Inc., Preferred Member Units | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(170)
Amount of Interest, Fees or Dividends Credited to Income							1,330
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							20,380
Gross Additions							0
Gross Reductions							170
Ending balance				$ 20,210			$ 20,210
Investment, Identifier [Axis]: OMi Holdings, Inc.C, Secured Debt | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							176
Amount of Interest, Fees or Dividends Credited to Income							550
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							18,000
Gross Reductions							0
Ending balance				$ 18,000			18,000
Investment, Identifier [Axis]: OMi Topco, LLC, Secured Debt | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(41)
Amount of Interest, Fees or Dividends Credited to Income					1,625
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					18,000
Gross Additions					41
Gross Reductions					1,791
Ending balance		$ 16,250			16,250
Investment, Identifier [Axis]: OMi Topco, LLC, Preferred Member Units | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					470
Amount of Interest, Fees or Dividends Credited to Income					1,676
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					20,210
Gross Additions					470
Gross Reductions					0
Ending balance		$ 20,680			$ 20,680
Investment, Identifier [Axis]: OMi Topco, LLC, Secured Debt August 31, 2021
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Investment, Identifier [Axis]: OMi Topco, LLC, Secured Debt August 31,2021
Schedule of Investments [Line Items]
Total Rate								12.00%
Investment, Identifier [Axis]: OVG Business Services, LLC, Secured Debt November 29, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.34%			9.34%
Spread	[1],[3]	6.25%			6.25%
Investment, Identifier [Axis]: OVG Business Services, LLC, Secured Debt November 29,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							7.25%
Spread	[6],[7]							6.25%
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Common Stock | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					0		(830)
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		830
Gross Reductions					0		830
Ending balance		$ 0		$ 0	$ 0		$ 0
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Preferred Stock | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		7.00%			7.00%
PIK Rate		7.00%			7.00%
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			$ 0
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Preferred Stock April 18, 2011
Schedule of Investments [Line Items]
Total Rate	[10]	7.00%			7.00%
PIK Rate	[10]	7.00%			7.00%
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Preferred Stock April 18,2011
Schedule of Investments [Line Items]
Total Rate								7.00%
PIK Rate								7.00%
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%
PIK Rate				12.00%			12.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							685
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							7,301
Gross Additions							686
Gross Reductions							0
Ending balance				$ 7,987			$ 7,987
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt April 18, 2011
Schedule of Investments [Line Items]
Total Rate	[10]	12.00%			12.00%
PIK Rate	[10]	12.00%			12.00%
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt April 18,2011
Schedule of Investments [Line Items]
Total Rate								12.00%
PIK Rate								12.00%
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt Four | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
PIK Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(1,255)
Amount of Interest, Fees or Dividends Credited to Income					129
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,285
Gross Additions					130
Gross Reductions					1,255
Ending balance		$ 3,160			$ 3,160
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt March 21, 2014
Schedule of Investments [Line Items]
Total Rate	[10]	12.00%			12.00%
PIK Rate	[10]	12.00%			12.00%
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt March 21,2014
Schedule of Investments [Line Items]
Total Rate								12.00%
PIK Rate								12.00%
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt May 10, 2013
Schedule of Investments [Line Items]
Total Rate	[10]	12.00%			12.00%
PIK Rate	[10]	12.00%			12.00%
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt May 10,2013
Schedule of Investments [Line Items]
Total Rate								12.00%
PIK Rate								12.00%
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt May 20, 2014
Schedule of Investments [Line Items]
Total Rate	[10]	12.00%			12.00%
PIK Rate	[10]	12.00%			12.00%
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt May 20,2014
Schedule of Investments [Line Items]
Total Rate								12.00%
PIK Rate								12.00%
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt One | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
PIK Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(273)
Amount of Interest, Fees or Dividends Credited to Income					28
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					935
Gross Additions					28
Gross Reductions					273
Ending balance		$ 690			$ 690
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt Three | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
PIK Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(602)
Amount of Interest, Fees or Dividends Credited to Income					62
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,055
Gross Additions					62
Gross Reductions					602
Ending balance		$ 1,515			$ 1,515
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt Two | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
PIK Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(280)
Amount of Interest, Fees or Dividends Credited to Income					29
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					954
Gross Additions					29
Gross Reductions					280
Ending balance		$ 703			$ 703
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Unsecured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		10.00%		10.00%	10.00%		10.00%
PIK Rate		10.00%		10.00%	10.00%		10.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					5		6
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					192		64
Gross Additions					5		129
Gross Reductions					0		6
Ending balance		$ 197		$ 187	$ 197		187
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Unsecured Debt June 05, 2017
Schedule of Investments [Line Items]
Total Rate	[10]	10.00%			10.00%
PIK Rate	[10]	10.00%			10.00%
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Unsecured Debt June 05,2017
Schedule of Investments [Line Items]
Total Rate								10.00%
PIK Rate								10.00%
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Warrants | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					0		830
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		830
Gross Reductions					0		830
Ending balance		$ 0		0	0		0
Investment, Identifier [Axis]: Oneliance, LLC, Preferred Stock | 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					1,056		0
Gross Additions					0		1,056
Gross Reductions					0		0
Ending balance		$ 1,056		$ 1,056	$ 1,056		$ 1,056
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%
Spread				11.00%			11.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							162
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							5,545
Gross Reductions							0
Ending balance				$ 5,545			5,545
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt August 06,2021
Schedule of Investments [Line Items]
Total Rate	[6]							12.00%
Spread	[6]							11.00%
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt One | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		13.56%			13.56%
Spread		11.00%			11.00%
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			$ 0
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt One August 06, 2021
Schedule of Investments [Line Items]
PIK Rate	[3],[4]	11.00%			11.00%
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt Two | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		13.56%			13.56%
Spread		11.00%			11.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					536
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,547
Gross Additions					9
Gross Reductions					0
Ending balance		$ 5,556			$ 5,556
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt Two August 06, 2021
Schedule of Investments [Line Items]
Total Rate	[3]	13.56%			13.56%
PIK Rate	[3]	11.00%			11.00%
Investment, Identifier [Axis]: Orttech Holdings, LLC, Preferred Stock | Other controlled 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					579		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					10,000		0
Gross Additions					0		12,600
Gross Reductions					0		1,000
Ending balance		$ 10,000		$ 11,600	$ 10,000		$ 11,600
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%
Spread				11.00%			11.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							767
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							24,183
Gross Reductions							0
Ending balance				$ 24,183			24,183
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt July 30,2021
Schedule of Investments [Line Items]
Total Rate	[6]							12.00%
Spread	[6]							11.00%
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt One | Other controlled investments
Schedule of Investments [Line Items]
Spread		11.00%			11.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					16
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					175
Gross Additions					0
Gross Reductions					175
Ending balance		$ 0			$ 0
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt One July 30, 2021
Schedule of Investments [Line Items]
Spread	[3],[4]	11.00%			11.00%
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt Two | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		13.63%			13.63%
Spread		11.00%			11.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					2,305
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					23,976
Gross Additions					41
Gross Reductions					600
Ending balance		$ 23,417			$ 23,417
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt Two July 30, 2021
Schedule of Investments [Line Items]
Total Rate	[3]	13.63%			13.63%
Spread	[3]	11.00%			11.00%
Investment, Identifier [Axis]: Ospemifene Royalty Sub LLC, Secured Debt July 08, 2013
Schedule of Investments [Line Items]
Total Rate	[1],[10]	11.50%			11.50%
Investment, Identifier [Axis]: Ospemifene Royalty Sub LLC, Secured Debt July 08,2013
Schedule of Investments [Line Items]
Total Rate	[7],[9]							11.50%
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			0
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	0		0
Investment, Identifier [Axis]: PCI Holding Company, Inc., Preferred Stock | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(203)
Amount of Interest, Fees or Dividends Credited to Income							2,852
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							4,130
Gross Additions							0
Gross Reductions							4,130
Ending balance				0			0
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							2,190
Amount of Interest, Fees or Dividends Credited to Income							805
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							11,500
Gross Additions							2,190
Gross Reductions							0
Ending balance				$ 13,690			$ 13,690
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock One | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					5,150
Amount of Interest, Fees or Dividends Credited to Income					908
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					14,360
Gross Additions					5,150
Gross Reductions					0
Ending balance		19,510			19,510
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock Two | Majority-owned 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					157
Gross Reductions					0
Ending balance		$ 157			$ 157
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate				7.50%			7.50%
Spread				7.00%			7.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(21)
Amount of Interest, Fees or Dividends Credited to Income							708
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							11,806
Gross Additions							790
Gross Reductions							221
Ending balance				$ 12,375			12,375
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt November 15,2016
Schedule of Investments [Line Items]
Total Rate	[6]							7.50%
Spread	[6]							7.00%
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt October 31,2019
Schedule of Investments [Line Items]
Total Rate	[6]							7.50%
Spread	[6]							7.00%
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt One | Majority-owned investments
Schedule of Investments [Line Items]
Spread		7.00%			7.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					79
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					727
Gross Additions					1,264
Gross Reductions					2,000
Ending balance		$ (9)			$ (9)
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt One October 31, 2019
Schedule of Investments [Line Items]
Spread	[3],[4]	7.00%			7.00%
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt Two | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		8.75%			8.75%
Spread		7.00%			7.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					239
Amount of Interest, Fees or Dividends Credited to Income					1,155
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					11,655
Gross Additions					8,000
Gross Reductions					0
Ending balance		$ 19,655			$ 19,655
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt Two November 15, 2016
Schedule of Investments [Line Items]
Total Rate	[3]	8.75%			8.75%
Spread	[3]	7.00%			7.00%
Investment, Identifier [Axis]: PT Network, LLC, Secured Debt October 12,2017
Schedule of Investments [Line Items]
Total Rate	[6],[7]							8.50%
Spread	[6],[7]							5.50%
PIK Rate	[6],[7]							2.00%
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt One August 19, 2022
Schedule of Investments [Line Items]
Spread	[1],[2],[3],[4]	8.25%			8.25%
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt Two August 19, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	11.40%			11.40%
Spread	[1],[2],[3]	8.25%			8.25%
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt One January 19, 2022
Schedule of Investments [Line Items]
Spread	[1],[2],[3],[4]	5.75%			5.75%
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt Three January 19, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	8.40%			8.40%
Spread	[1],[2],[3]	5.75%			5.75%
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt Two January 19, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	8.45%			8.45%
Spread	[1],[2],[3]	5.75%			5.75%
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					14,850		5,539
Amount of Interest, Fees or Dividends Credited to Income					5,754		1,949
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					26,970		15,940
Gross Additions					14,850		5,540
Gross Reductions					0		0
Ending balance		$ 41,820		$ 21,480	41,820		$ 21,480
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							258
Amount of Interest, Fees or Dividends Credited to Income							3,223
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							37,202
Gross Additions							310
Gross Reductions							3,838
Ending balance				$ 33,674			33,674
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt April 27,2020
Schedule of Investments [Line Items]
Total Rate								12.00%
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt One | Other controlled 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					24
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					1,500
Gross Reductions					1,500
Ending balance		$ 0			$ 0
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt Three | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(76)
Amount of Interest, Fees or Dividends Credited to Income					2,819
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					32,674
Gross Additions					76
Gross Reductions					4,069
Ending balance		$ 28,681			$ 28,681
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt Three April 27, 2020
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt Two | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
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			0
Investment, Identifier [Axis]: Pegasus Research Group, LLC, Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(1,550)
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							8,830
Gross Additions							0
Gross Reductions							1,550
Ending balance				7,280			7,280
Investment, Identifier [Axis]: Preferred Member Units (non-voting), Member Units | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					617
Amount of Unrealized Gain/(Loss)					(541)
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					617
Gross Reductions					3,177
Ending balance		0			0
Investment, Identifier [Axis]: Principle Environmental, LLC, Common Stock | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					80		(490)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					710		0
Gross Additions					80		1,200
Gross Reductions					0		490
Ending balance		790		710	790		710
Investment, Identifier [Axis]: Principle Environmental, LLC, Preferred Member Units | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					1,070		(920)
Amount of Interest, Fees or Dividends Credited to Income					656		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					11,160		10,500
Gross Additions					1,070		0
Gross Reductions					0		920
Ending balance		12,230		$ 9,580	12,230		$ 9,580
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate				13.00%			13.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(62)
Amount of Interest, Fees or Dividends Credited to Income							649
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							6,397
Gross Additions							18
Gross Reductions							63
Ending balance				$ 6,352			6,352
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt February 01,2011
Schedule of Investments [Line Items]
Total Rate								13.00%
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt July 01,2011
Schedule of Investments [Line Items]
Total Rate								13.00%
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt One | Majority-owned 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					104
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,465
Gross Additions					9
Gross Reductions					1,474
Ending balance		$ 0			$ 0
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt Two | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					602
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,808
Gross Additions					18
Gross Reductions					26
Ending balance		$ 5,800			$ 5,800
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt Two February 01, 2011
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%
Investment, Identifier [Axis]: Principle Environmental, LLC, Warrants | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							330
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							870
Gross Additions							330
Gross Reductions							1,200
Ending balance				0			0
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt July 06,2020
Schedule of Investments [Line Items]
Total Rate	[6],[7]							7.75%
Spread	[6],[7]							6.75%
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt One July 06, 2020
Schedule of Investments [Line Items]
Spread	[1],[3],[4]	6.50%			6.50%
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt Two July 06, 2020
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.33%			9.33%
Spread	[1],[3]	6.50%			6.50%
Investment, Identifier [Axis]: Quality Lease Service, LLC, Member Units | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					76		(180)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,148		4,460
Gross Additions					76		0
Gross Reductions					1,599		1,430
Ending balance		$ 625		3,030	$ 625		3,030
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt April 08,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							7.75%
Spread	[6],[7]							6.75%
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt One April 08, 2021
Schedule of Investments [Line Items]
Spread	[1],[2],[3],[4]	6.75%			6.75%
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt Two April 08, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	9.03%			9.03%
Spread	[1],[2],[3]	6.75%			6.75%
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt One September 01, 2020
Schedule of Investments [Line Items]
Total Rate	[1],[3]	10.59%			10.59%
Spread	[1],[3]	7.75%			7.75%
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt September 01,2020
Schedule of Investments [Line Items]
Total Rate	[6],[7]							9.00%
Spread	[6],[7]							7.75%
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt Two September 01, 2020
Schedule of Investments [Line Items]
Total Rate	[1],[3]	10.03%			10.03%
Spread	[1],[3]	7.75%			7.75%
Investment, Identifier [Axis]: Research Now Group, Inc. and Survey Sampling International, LLC, Secured Debt December 29, 2017
Schedule of Investments [Line Items]
Total Rate	[2],[3],[8]	8.84%			8.84%
Spread	[2],[3],[8]	5.50%			5.50%
Investment, Identifier [Axis]: Research Now Group, Inc. and Survey Sampling International, LLC, Secured Debt December 29,2017
Schedule of Investments [Line Items]
Total Rate	[5],[6]							6.50%
Spread	[5],[6]							5.50%
Investment, Identifier [Axis]: River Aggregates, LLC, Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					180
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,280
Gross Additions					180
Gross Reductions					0
Ending balance		$ 3,460			3,460
Investment, Identifier [Axis]: River Aggregates, LLC, Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							160
Amount of Interest, Fees or Dividends Credited to Income							125
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							3,240
Gross Additions							160
Gross Reductions							0
Ending balance				$ 3,400			$ 3,400
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Preferred Equity | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					4,140
Amount of Interest, Fees or Dividends Credited to Income					558
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					11,070
Gross Additions					4,140
Gross Reductions					0
Ending balance		$ 15,210			$ 15,210
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt December 15,2021
Schedule of Investments [Line Items]
Total Rate	[6]							12.00%
Spread	[6]							11.00%
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt One | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		13.63%			13.63%
Spread		11.00%			11.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					24
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					(44)
Gross Additions					6
Gross Reductions					0
Ending balance		$ (38)			$ (38)
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt One December 15, 2021
Schedule of Investments [Line Items]
Spread	[3],[4]	11.00%			11.00%
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt Two | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		13.63%			13.63%
Spread		11.00%			11.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					3,465
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					36,000
Gross Additions					59
Gross Reductions					450
Ending balance		$ 35,609			$ 35,609
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt Two December 15, 2021
Schedule of Investments [Line Items]
Total Rate	[3]	13.63%			13.63%
Spread	[3]	11.00%			11.00%
Investment, Identifier [Axis]: Rocaceia, LLC (Quality Lease and Rental Holdings, LLC), Preferred Member Units | 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					0
Gross Additions					0
Gross Reductions					0
Ending balance		$ 0			$ 0
Investment, Identifier [Axis]: Rocaceia, LLC (Quality Lease and Rental Holdings, LLC), Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		12.00%		12.00%	12.00%		12.00%
Amount of Realized Gain/(Loss)					$ (67)		$ (694)
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	$ 0		0
Investment, Identifier [Axis]: Rocaceia, LLC (Quality Lease and Rental Holdings, LLC), Secured Debt June 30,2015
Schedule of Investments [Line Items]
Total Rate	[9],[11],[33]							12.00%
Investment, Identifier [Axis]: Rocaceia, LLC Secured Debt June 30, 2015
Schedule of Investments [Line Items]
Total Rate	[10],[15],[34]	12.00%			12.00%
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt August 27,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							7.00%
Spread	[6],[7]							6.00%
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt One August 27, 2021
Schedule of Investments [Line Items]
Spread	[1],[3],[4]	6.50%			6.50%
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt Three August 27, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	8.78%			8.78%
Spread	[1],[3]	6.50%			6.50%
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt Two August 27, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	8.78%			8.78%
Spread	[1],[3]	6.50%			6.50%
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt July 16,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							7.25%
Spread	[6],[7]							6.25%
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt One July 16, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	11.99%			11.99%
Spread	[1],[2],[3]	8.25%			8.25%
PIK Rate	[1],[2],[3]	2.00%			2.00%
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt Two July 16, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	11.99%			11.99%
Spread	[1],[2],[3]	8.25%			8.25%
PIK Rate	[1],[2],[3]	2.00%			2.00%
Investment, Identifier [Axis]: SI East, LLC (Stavig), Preferred Member Units | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					3,380		5,422
Amount of Interest, Fees or Dividends Credited to Income					568		2,102
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					11,570		9,780
Gross Additions					3,380		5,422
Gross Reductions					0		4,782
Ending balance		$ 14,950		$ 10,420	$ 14,950		$ 10,420
Investment, Identifier [Axis]: SI East, LLC (Stavig), Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate				10.25%			10.25%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(74)
Amount of Interest, Fees or Dividends Credited to Income							2,332
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							32,962
Gross Additions							34,500
Gross Reductions							3,862
Ending balance				$ 63,600			63,600
Investment, Identifier [Axis]: SI East, LLC (Stavig), Secured Debt One | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		10.25%			10.25%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					195
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,250
Gross Additions					3,750
Gross Reductions					3,750
Ending balance		$ 2,250			$ 2,250
Investment, Identifier [Axis]: SI East, LLC (Stavig), Secured Debt Two | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		10.25%			10.25%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					6,068
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					63,600
Gross Additions					31,125
Gross Reductions					1,489
Ending balance		$ 93,236			$ 93,236
Investment, Identifier [Axis]: SI East, LLC, Secured Debt August 31,2018
Schedule of Investments [Line Items]
Total Rate								10.25%
Investment, Identifier [Axis]: SI East, LLC, Senior Debt One August 31, 2018
Schedule of Investments [Line Items]
Total Rate		10.25%			10.25%
Investment, Identifier [Axis]: SI East, LLC, Senior Debt Two August 31, 2018
Schedule of Investments [Line Items]
Total Rate		10.25%			10.25%
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt October 29,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							7.00%
Spread	[6],[7]							6.00%
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt One October 29, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	8.81%			8.81%
Spread	[1],[2],[3]	6.25%			6.25%
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt Three October 29, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	8.14%			8.14%
Spread	[1],[2],[3]	6.25%			6.25%
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt Two October 29, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	8.81%			8.81%
Spread	[1],[2],[3]	6.25%			6.25%
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt One July 01, 2022
Schedule of Investments [Line Items]
Spread	[1],[2],[3],[4]	7.50%			7.50%
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt Two July 01, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	9.58%			9.58%
Spread	[1],[2],[3]	7.50%			7.50%
Investment, Identifier [Axis]: Salient Partners L.P., Secured Debt August 31,2018
Schedule of Investments [Line Items]
Total Rate	[5],[6]							7.00%
Spread	[5],[6]							6.00%
Investment, Identifier [Axis]: Salient Partners L.P., Secured Debt One August 31, 2018
Schedule of Investments [Line Items]
Total Rate	[3],[8]	9.67%			9.67%
Spread	[3],[8]	6.00%			6.00%
Investment, Identifier [Axis]: Salient Partners L.P., Secured Debt Two September 30, 2021
Schedule of Investments [Line Items]
Total Rate	[3],[8]	9.67%			9.67%
Spread	[3],[8]	6.00%			6.00%
Investment, Identifier [Axis]: Savers, Inc., Secured Debt May 14, 2021
Schedule of Investments [Line Items]
Total Rate	[3],[8]	9.17%			9.17%
Spread	[3],[8]	5.50%			5.50%
Investment, Identifier [Axis]: Savers, Inc., Secured Debt May 14,2021
Schedule of Investments [Line Items]
Total Rate	[5],[6]							6.25%
Spread	[5],[6]							5.50%
Investment, Identifier [Axis]: Slick Innovations, LLC, Common Stock | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					130		180
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,510		1,330
Gross Additions					130		180
Gross Reductions					0		0
Ending balance		$ 1,640		$ 1,510	$ 1,640		$ 1,510
Investment, Identifier [Axis]: Slick Innovations, LLC, Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		11.00%		13.00%	11.00%		13.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(41)		(33)
Amount of Interest, Fees or Dividends Credited to Income					481		545
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,320		5,720
Gross Additions					41		33
Gross Reductions					1,121		433
Ending balance		$ 4,240		$ 5,320	$ 4,240		5,320
Investment, Identifier [Axis]: Slick Innovations, LLC, Secured Debt September 13, 2018
Schedule of Investments [Line Items]
Total Rate		11.00%			11.00%
Investment, Identifier [Axis]: Slick Innovations, LLC, Secured Debt September 13,2018
Schedule of Investments [Line Items]
Total Rate								13.00%
Investment, Identifier [Axis]: Slick Innovations, LLC, Warrants | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					40		40
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					400		360
Gross Additions					40		40
Gross Reductions					0		0
Ending balance		$ 440		400	440		400
Investment, Identifier [Axis]: Sonic Systems International, LLC, Common Stock | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					64		0
Amount of Interest, Fees or Dividends Credited to Income					32		26
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,070		0
Gross Additions					350		1,070
Gross Reductions					0		0
Ending balance		$ 1,420		$ 1,070	$ 1,420		$ 1,070
Investment, Identifier [Axis]: Sonic Systems International, LLC, Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		9.75%		8.50%	9.75%		8.50%
Spread		7.50%		7.50%	7.50%		7.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					102		0
Amount of Interest, Fees or Dividends Credited to Income					966		111
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					11,757		0
Gross Additions					3,856		11,747
Gross Reductions					0		0
Ending balance		$ 15,613		$ 11,747	$ 15,613		11,747
Investment, Identifier [Axis]: Sonic Systems International, LLC, Secured Debt August 20, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.78%			9.78%
Spread	[1],[3]	7.50%			7.50%
Investment, Identifier [Axis]: Sonic Systems International, LLC, Secured Debt August 20,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							8.50%
Spread	[6],[7]							7.50%
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt December 10,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							7.25%
Spread	[6],[7]							6.25%
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt One December 10, 2021
Schedule of Investments [Line Items]
Spread	[1],[3],[4]	5.75%			5.75%
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt Two December 10, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	8.74%			8.74%
Spread	[1],[3]	5.75%			5.75%
Investment, Identifier [Axis]: Staples Canada ULC, Secured Debt September 14, 2017
Schedule of Investments [Line Items]
Total Rate	[1],[3],[25],[26],[35]	10.19%			10.19%
Spread	[1],[3],[25],[26],[35]	7.00%			7.00%
Investment, Identifier [Axis]: Staples Canada ULC, Secured Debt September 14,2017
Schedule of Investments [Line Items]
Total Rate	[6],[7],[27],[28],[36]							8.00%
Spread	[6],[7],[27],[28],[36]							7.00%
Investment, Identifier [Axis]: Stellant Systems, Inc., Secured Debt October 22, 2021
Schedule of Investments [Line Items]
Total Rate	[2],[3],[8]	8.41%			8.41%
Spread	[2],[3],[8]	5.50%			5.50%
Investment, Identifier [Axis]: Stellant Systems, Inc., Secured Debt October 22,2021
Schedule of Investments [Line Items]
Total Rate	[5],[6]							6.25%
Spread	[5],[6]							5.50%
Investment, Identifier [Axis]: Student Resource Center, LLC, Secured Debt June 25,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							9.00%
Spread	[6],[7]							8.00%
Investment, Identifier [Axis]: Student Resource Center, LLC, Secured Debt One June 15, 2021
Schedule of Investments [Line Items]
Spread	[1],[3],[4]	8.00%			8.00%
Investment, Identifier [Axis]: Student Resource Center, LLC, Secured Debt Three September 30, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[3]	11.75%			11.75%
Spread	[1],[3]	9.50%			9.50%
Investment, Identifier [Axis]: Student Resource Center, LLC, Secured Debt Two September 30, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[3]	10.25%			10.25%
Spread	[1],[3]	7.00%			7.00%
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., Preferred Member Units | 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					4,500		4,500
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 4,500		$ 4,500	$ 4,500		$ 4,500
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		12.00%		12.00%	12.00%		12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					1,991		1,982
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					21,332		21,298
Gross Additions					35		25
Gross Reductions					0		0
Ending balance		$ 21,367		$ 21,323	$ 21,367		21,323
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., Secured Debt August 31, 2020
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., Secured Debt August 31,2020
Schedule of Investments [Line Items]
Total Rate								12.00%
Investment, Identifier [Axis]: Tacala Investment Corp., Secured Debt March 19,2021
Schedule of Investments [Line Items]
Total Rate	[6],[37]							4.25%
Spread	[6],[37]							3.50%
PIK Rate								2.00%
Investment, Identifier [Axis]: Tacala Investment Corp., Secured Debt May 19, 2021
Schedule of Investments [Line Items]
Total Rate	[3],[38],[39]	6.62%			6.62%
Spread	[3],[38],[39]	3.50%			3.50%
Investment, Identifier [Axis]: Team Public Choices, LLC, Secured Debt December 22, 2020
Schedule of Investments [Line Items]
Total Rate	[3],[8]	7.81%			7.81%
Spread	[3],[8]	5.00%			5.00%
Investment, Identifier [Axis]: Team Public Choices, LLC, Secured Debt December 22,2020
Schedule of Investments [Line Items]
Total Rate	[5],[6]							6.00%
Spread	[5],[6]							5.00%
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					(1,933)		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					8,579		8,136
Gross Additions					488		0
Gross Reductions					1,930		0
Ending balance		$ 7,137		$ 8,136	$ 7,137		$ 8,136
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							1,486
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							16,301
Gross Additions							2,032
Gross Reductions							1,600
Ending balance				$ 16,733			16,733
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt August 31,2018
Schedule of Investments [Line Items]
Total Rate								12.00%
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt One | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					158
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,040
Gross Additions					800
Gross Reductions					0
Ending balance		$ 1,840			$ 1,840
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt One August 31, 2018
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt Two | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(71)
Amount of Interest, Fees or Dividends Credited to Income					1,431
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					15,141
Gross Additions					47
Gross Reductions					71
Ending balance		$ 15,117			$ 15,117
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt Two August 31, 2018
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Investment, Identifier [Axis]: Televerde, LLC, Member Units | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(2,076)
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					7,280
Gross Additions					0
Gross Reductions					2,076
Ending balance		$ 5,204			5,204
Investment, Identifier [Axis]: Televerde, LLC, Preferred Stock | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					1,076
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					1,794
Gross Reductions					0
Ending balance		1,794			1,794
Investment, Identifier [Axis]: The Affiliati Network, LLC, Preferred Stock | 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							0
Gross Additions							6,400
Gross Reductions							0
Ending balance				$ 6,400			$ 6,400
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt August 09,2021
Schedule of Investments [Line Items]
Total Rate								7.00%
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt One | Affiliate investments
Schedule of Investments [Line Items]
Total Rate				10.00%			10.00%
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							381
Gross Reductions							0
Ending balance				$ 381			$ 381
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt One August 09,2021
Schedule of Investments [Line Items]
Total Rate								11.83%
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt Two | Affiliate investments
Schedule of Investments [Line Items]
Total Rate				11.83%			11.83%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							421
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							13,862
Gross Reductions							239
Ending balance				$ 13,623			13,623
Investment, Identifier [Axis]: The Affiliati Network, LLC., Preferred Stock | 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					339
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,400
Gross Additions					0
Gross Reductions					0
Ending balance		6,400			6,400
Investment, Identifier [Axis]: The Affiliati Network, LLC., Secured Debt One | 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					28
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					262
Gross Additions					3,523
Gross Reductions					3,800
Ending balance		$ (15)			$ (15)
Investment, Identifier [Axis]: The Affiliati Network, LLC., Secured Debt Two | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					1,166
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					12,834
Gross Additions					35
Gross Reductions					1,720
Ending balance		$ 11,149			$ 11,149
Investment, Identifier [Axis]: The Affiliati Network, LLC., Secured Debt Two August 09, 2021
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Common Stock | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					(1,240)		620
Amount of Interest, Fees or Dividends Credited to Income					87		87
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					8,660		6,030
Gross Additions					0		620
Gross Reductions					1,240		0
Ending balance		$ 7,420		$ 6,650	$ 7,420		$ 6,650
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							811
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							8,644
Gross Additions							14
Gross Reductions							0
Ending balance				$ 8,658			$ 8,658
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt May 31,2019
Schedule of Investments [Line Items]
Total Rate								12.00%
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt One | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		8.00%			8.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					5
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					(8)
Gross Additions					3
Gross Reductions					0
Ending balance		$ (5)			$ (5)
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt Two | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(17)
Amount of Interest, Fees or Dividends Credited to Income					785
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					8,720
Gross Additions					17
Gross Reductions					417
Ending balance		$ 8,320			$ 8,320
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt Two May 31, 2019
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt May 17, 2017
Schedule of Investments [Line Items]
Total Rate	[2],[3],[8]	11.57%			11.57%
Spread	[2],[3],[8]	8.50%			8.50%
PIK Rate	[2],[3],[8]	7.25%			7.25%
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt May 17,2017
Schedule of Investments [Line Items]
Total Rate	[5],[6]							7.00%
Spread	[5],[6]							6.00%
Investment, Identifier [Axis]: USA DeBusk LLC, Secured Debt October 22, 2019
Schedule of Investments [Line Items]
Total Rate	[1],[3]	8.27%			8.27%
Spread	[1],[3]	5.75%			5.75%
Investment, Identifier [Axis]: USA DeBusk LLC, Secured Debt October 22,2019
Schedule of Investments [Line Items]
Total Rate	[6],[7]							6.75%
Spread	[6],[7]							5.75%
Investment, Identifier [Axis]: UniTek Global Services, Inc., Common Stock | 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					0
Gross Additions					0
Gross Reductions					0
Ending balance		$ 0			$ 0
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock August 21,2018
Schedule of Investments [Line Items]
Total Rate	[5]							20.00%
PIK Rate	[5]							20.00%
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock August 29,2019
Schedule of Investments [Line Items]
Total Rate	[5],[14]							20.00%
PIK Rate	[5],[14]							20.00%
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock Four | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		13.50%			13.50%
PIK Rate		13.50%			13.50%
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			$ 0
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock January 15,2015
Schedule of Investments [Line Items]
Total Rate	[5]							13.50%
PIK Rate	[5]							13.50%
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock June 30,2017
Schedule of Investments [Line Items]
Total Rate	[5]							19.00%
PIK Rate	[5]							19.00%
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock One | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		20.00%		20.00%	20.00%		20.00%
PIK Rate		20.00%		20.00%	20.00%		20.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(280)		737
Amount of Interest, Fees or Dividends Credited to Income					280		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,832		375
Gross Additions					281		737
Gross Reductions					280		0
Ending balance		$ 2,833		$ 1,112	$ 2,833		$ 1,112
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock Three | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		19.00%			19.00%
PIK Rate		19.00%			19.00%
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			$ 0
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock Two | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		20.00%		20.00%	20.00%		20.00%
PIK Rate		20.00%		20.00%	20.00%		20.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					153		(230)
Amount of Interest, Fees or Dividends Credited to Income					0		230
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,498		2,833
Gross Additions					153		230
Gross Reductions					0		230
Ending balance		$ 1,651		$ 2,833	$ 1,651		$ 2,833
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Convertible Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		15.00%		15.00%	15.00%		15.00%
PIK Rate		15.00%		15.00%	15.00%		15.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					782		966
Amount of Interest, Fees or Dividends Credited to Income					167		105
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,375		0
Gross Additions					1,896		2,249
Gross Reductions					0		87
Ending balance		$ 4,271		$ 2,162	$ 4,271		$ 2,162
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Convertible Debt January 01,2021
Schedule of Investments [Line Items]
Total Rate	[5]							15.00%
PIK Rate	[5]							15.00%
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate				8.50%			8.50%
Spread				5.50%			5.50%
PIK Rate				2.00%			2.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							114
Amount of Interest, Fees or Dividends Credited to Income							183
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							2,425
Gross Additions							243
Gross Reductions							454
Ending balance				$ 2,214			2,214
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt August 27,2018
Schedule of Investments [Line Items]
Total Rate	[5],[6]							8.50%
Spread	[5],[6]							5.50%
PIK Rate	[5],[6]							2.00%
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt October 15,2018
Schedule of Investments [Line Items]
Total Rate	[5],[6]							8.50%
Spread	[5],[6]							5.50%
PIK Rate	[5],[6]							2.00%
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt One | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		10.76%			10.76%
Spread		5.50%			5.50%
PIK Rate		2.00%			2.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					3
Amount of Interest, Fees or Dividends Credited to Income					29
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					371
Gross Additions					9
Gross Reductions					0
Ending balance		$ 380			$ 380
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt Two | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		10.76%			10.76%
Spread		5.50%			5.50%
PIK Rate		2.00%			2.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					26
Amount of Interest, Fees or Dividends Credited to Income					146
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,852
Gross Additions					61
Gross Reductions					212
Ending balance		$ 1,701			$ 1,701
Investment, Identifier [Axis]: UniTek Global Services, Inc.., Preferred Stock August 21, 2018
Schedule of Investments [Line Items]
Total Rate	[8]	20.00%			20.00%
PIK Rate	[8]	20.00%			20.00%
Investment, Identifier [Axis]: UniTek Global Services, Inc.., Preferred Stock August 29, 2019
Schedule of Investments [Line Items]
Total Rate	[8],[17]	20.00%			20.00%
PIK Rate	[8],[17]	20.00%			20.00%
Investment, Identifier [Axis]: UniTek Global Services, Inc.., Preferred Stock January 15, 2015
Schedule of Investments [Line Items]
Total Rate	[8]	13.50%			13.50%
PIK Rate	[8]	13.50%			13.50%
Investment, Identifier [Axis]: UniTek Global Services, Inc.., Preferred Stock June 30, 2017
Schedule of Investments [Line Items]
Total Rate	[8]	19.00%			19.00%
PIK Rate	[8]	19.00%			19.00%
Investment, Identifier [Axis]: UniTek Global Services, Inc.., Secured Convertible Debt January 1, 2018
Schedule of Investments [Line Items]
Total Rate	[8]	15.00%			15.00%
PIK Rate	[8]	15.00%			15.00%
Investment, Identifier [Axis]: UniTek Global Services, Inc.., Secured Debt August 27, 2018
Schedule of Investments [Line Items]
Total Rate	[2],[3],[8]	10.76%			10.76%
Spread	[2],[3],[8]	5.50%			5.50%
PIK Rate	[2],[3],[8]	2.00%			2.00%
Investment, Identifier [Axis]: UniTek Global Services, Inc.., Secured Debt October 15, 2018
Schedule of Investments [Line Items]
Total Rate	[2],[3],[8]	10.76%			10.76%
Spread	[2],[3],[8]	5.50%			5.50%
PIK Rate	[2],[3],[8]	2.00%			2.00%
Investment, Identifier [Axis]: UnionRock Energy Fund II, LP, LP Interests | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							2,407
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							2,894
Gross Additions							3,781
Gross Reductions							220
Ending balance				$ 6,455			$ 6,455
Investment, Identifier [Axis]: UnionRock Energy Fund II, LP, LP Interests | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(64)
Amount of Interest, Fees or Dividends Credited to Income					194
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,123
Gross Additions					1,880
Gross Reductions					2,649
Ending balance		$ 5,354			$ 5,354
Investment, Identifier [Axis]: Universal Wellhead Services Holdings, LLC, Preferred Member Units December 07, 2016
Schedule of Investments [Line Items]
Total Rate	[1],[18]	14.00%			14.00%
PIK Rate	[1],[18]	14.00%			14.00%
Investment, Identifier [Axis]: Universal Wellhead Services Holdings, LLC, Preferred Member Units December 07,2016
Schedule of Investments [Line Items]
Total Rate	[7],[16]							14.00%
PIK Rate	[7],[16]							14.00%
Investment, Identifier [Axis]: VORTEQ Coil Finishers, LLC, Secured Debt November 30, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.75%			9.75%
Spread	[1],[3]	7.25%			7.25%
Investment, Identifier [Axis]: VORTEQ Coil Finishers, LLC, Secured Debt November 30,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							8.50%
Spread	[6],[7]							7.50%
Investment, Identifier [Axis]: VVS Holdco LLC, Preferred Equity | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					240
Amount of Interest, Fees or Dividends Credited to Income					300
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					11,840
Gross Additions					238
Gross Reductions					0
Ending balance		$ 12,078			$ 12,078
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt One | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		8.63%			8.63%
Spread		6.00%			6.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					45
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,169
Gross Additions					805
Gross Reductions					1,201
Ending balance		$ 773			$ 773
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt One December 01, 2021
Schedule of Investments [Line Items]
Total Rate	[3],[18]	8.63%			8.63%
Spread	[3],[18]	6.00%			6.00%
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt One December 01,2021
Schedule of Investments [Line Items]
Total Rate	[6],[16]							7.00%
Spread	[6],[16]							6.00%
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt Two | Other controlled investments
Schedule of Investments [Line Items]
Total Rate		11.50%			11.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					2,697
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					30,100
Gross Additions					46
Gross Reductions					0
Ending balance		$ 30,146			$ 30,146
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt Two December 01, 2021
Schedule of Investments [Line Items]
Total Rate	[18]	11.50%			11.50%
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt Two December 01,2021
Schedule of Investments [Line Items]
Total Rate	[16]							11.50%
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt November 09, 2020
Schedule of Investments [Line Items]
Spread	[3],[4],[8]	5.25%			5.25%
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt November 09,2020
Schedule of Investments [Line Items]
Total Rate	[5],[6]							6.25%
Spread	[5],[6]							5.25%
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt One November 09,2020
Schedule of Investments [Line Items]
Total Rate	[5],[6]							7.00%
Spread	[5],[6]							6.00%
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt Two November 09, 2020
Schedule of Investments [Line Items]
Total Rate	[3],[8]	8.81%			8.81%
Spread	[3],[8]	6.00%			6.00%
Investment, Identifier [Axis]: Vida Capital, Inc, Secured Debt October 10, 2019
Schedule of Investments [Line Items]
Total Rate	[8]	9.12%			9.12%
Spread	[8]	6.00%			6.00%
Investment, Identifier [Axis]: Vida Capital, Inc, Secured Debt October 10,2019
Schedule of Investments [Line Items]
Total Rate	[5]							6.10%
Spread	[5]							6.00%
Investment, Identifier [Axis]: Vision Interests, Inc., Secured Debt | Other controlled investments
Schedule of Investments [Line Items]
Total Rate				13.00%			13.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							200
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							2,028
Gross Additions							0
Gross Reductions							0
Ending balance				$ 2,028			2,028
Investment, Identifier [Axis]: Vision Interests, Inc., Series A Preferred Stock | Other controlled investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					0		(160)
Amount of Interest, Fees or Dividends Credited to Income					144		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,000		3,160
Gross Additions					0		0
Gross Reductions					0		160
Ending balance		$ 3,000		3,000	3,000		3,000
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units | Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(5,989)		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					5,990		5,990
Gross Additions					0		0
Gross Reductions					5,990		0
Ending balance		$ 0		$ 5,990	$ 0		$ 5,990
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		11.50%		11.50%	11.50%		11.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(104)		991
Amount of Interest, Fees or Dividends Credited to Income					1,490		1,736
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					17,434		19,243
Gross Additions					0		991
Gross Reductions					804		2,800
Ending balance		$ 16,630		$ 17,434	$ 16,630		$ 17,434
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt January 26, 2015
Schedule of Investments [Line Items]
Total Rate	[15]	11.50%			11.50%
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt January 26,2015
Schedule of Investments [Line Items]
Total Rate	[11]							11.50%
Investment, Identifier [Axis]: Volusion, LLC, Unsecured Convertible Debt | Affiliate investments
Schedule of Investments [Line Items]
Total Rate		8.00%		8.00%	8.00%		8.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		118
Amount of Interest, Fees or Dividends Credited to Income					24		24
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					409		291
Gross Additions					0		118
Gross Reductions					0		0
Ending balance		$ 409		$ 409	$ 409		409
Investment, Identifier [Axis]: Volusion, LLC, Unsecured Convertible Debt May 16, 2018
Schedule of Investments [Line Items]
Total Rate		8.00%			8.00%
Investment, Identifier [Axis]: Volusion, LLC, Unsecured Convertible Debt May 16,2018
Schedule of Investments [Line Items]
Total Rate								8.00%
Investment, Identifier [Axis]: Volusion, LLC, Warrants | 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					0
Gross Additions					0
Gross Reductions					0
Ending balance		$ 0			$ 0
Investment, Identifier [Axis]: Wahoo Fitness Acquisition L.L.C., Secured Debt August 17, 2021
Schedule of Investments [Line Items]
Total Rate	[2],[3],[8]	9.57%			9.57%
Spread	[2],[3],[8]	5.75%			5.75%
Investment, Identifier [Axis]: Wahoo Fitness Acquisition L.L.C., Secured Debt August 17,2021
Schedule of Investments [Line Items]
Total Rate	[5],[6]							6.75%
Spread	[5],[6]							5.75%
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt July 19,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							8.00%
Spread	[6],[7]							7.00%
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt One July 19, 2021
Schedule of Investments [Line Items]
Spread	[1],[3],[4]	7.00%			7.00%
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt Two July 19, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.28%			9.28%
Spread	[1],[3]	7.00%			7.00%
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt December 17,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							7.25%
Spread	[6],[7]							6.25%
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt One December 17, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.63%			9.63%
Spread	[1],[3]	6.00%			6.00%
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt Three December 17, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	8.25%			8.25%
Spread	[1],[3]	6.00%			6.00%
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt Two December 17, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	8.25%			8.25%
Spread	[1],[3]	6.00%			6.00%
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt One March 01, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	8.59%			8.59%
Spread	[1],[2],[3]	6.00%			6.00%
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt Two March 01, 2022
Schedule of Investments [Line Items]
Spread	[1],[2],[3],[4]	6.00%			6.00%
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt One November 19, 2021
Schedule of Investments [Line Items]
Spread	[1],[3],[4]	7.00%			7.00%
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt Three November 19, 2021
Schedule of Investments [Line Items]
Total Rate	[1],[3]	9.23%			9.23%
Spread	[1],[3]	7.00%			7.00%
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt Two November 19, 2021
Schedule of Investments [Line Items]
Spread	[1],[3],[4]	7.00%			7.00%
Investment, Identifier [Axis]: Xenon Arc, Inc, Secured Debt December 17,2021
Schedule of Investments [Line Items]
Total Rate	[6],[7]							6.75%
Spread	[6],[7]							6.00%
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt One December 17, 2021
Schedule of Investments [Line Items]
Spread	[1],[4]	5.25%			5.25%
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt Three December 17, 2021
Schedule of Investments [Line Items]
Total Rate	[1]	8.63%			8.63%
Spread	[1]	5.25%			5.25%
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt Two December 17, 2021
Schedule of Investments [Line Items]
Spread	[1],[4]	5.25%			5.25%
Investment, Identifier [Axis]: YS Garments, LLC, Secured Debt August 22, 2018
Schedule of Investments [Line Items]
Total Rate	[3],[8]	7.92%			7.92%
Spread	[3],[8]	5.50%			5.50%
Investment, Identifier [Axis]: YS Garments, LLC, Secured Debt August 22,2018
Schedule of Investments [Line Items]
Total Rate	[5],[6]							6.50%
Spread	[5],[6]							5.50%
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Preferred Member Units | Majority-owned investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					(940)		350
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,130		1,780
Gross Additions					0		350
Gross Reductions					940		0
Ending balance		$ 1,190		$ 2,130	$ 1,190		$ 2,130
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt June 01,2015
Schedule of Investments [Line Items]
Total Rate								12.00%
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt One | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		12.00%		12.00%	12.00%		12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					57		57
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					625		625
Gross Additions					0		0
Gross Reductions					175		0
Ending balance		$ 450		$ 625	$ 450		$ 625
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt One June 01, 2015
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt One October 01,2008
Schedule of Investments [Line Items]
Total Rate								6.50%
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt Three | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		14.00%		6.50%	14.00%		6.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(74)		21
Amount of Interest, Fees or Dividends Credited to Income					292		49
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,750		979
Gross Additions					0		21
Gross Reductions					74		0
Ending balance		$ 2,676		$ 1,000	$ 2,676		$ 1,000
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt Three October 01, 2008
Schedule of Investments [Line Items]
Total Rate		14.00%			14.00%
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt Two | Majority-owned investments
Schedule of Investments [Line Items]
Total Rate		6.50%		14.00%	6.50%		14.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					49		292
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,000		2,750
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 1,000		$ 2,750	$ 1,000		$ 2,750
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt Two October 01, 2008
Schedule of Investments [Line Items]
Total Rate		6.50%			6.50%
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt Two October 01,2008
Schedule of Investments [Line Items]
Total Rate								14.00%
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Warrants | Majority-owned 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			$ 0
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt One February 11, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3]	9.94%			9.94%
Spread	[1],[2],[3]	7.25%			7.25%
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt Two February 11, 2022
Schedule of Investments [Line Items]
Total Rate	[1],[2],[3],[39]	9.86%			9.86%
Spread	[1],[2],[3],[39]	7.25%			7.25%

[1] Private Loan portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Private Loan portfolio investments.

[2] A majority of the variable rate loans in the Company’s investment portfolio bear interest at a rate that may be determined by reference to either LIBOR (“L”), SOFR (“SF”) or an alternate Base Rate (commonly based on the Federal Funds Rate or the Prime Rate (“P”)), which typically resets every one, three, or six months at the borrower’s option. SOFR based contracts may include a credit spread adjustment (the “Adjustment”) that is charged in addition to the stated spread. The Adjustment is applied when the SOFR rate, plus the Adjustment, exceeds the stated floor rate, as applicable. As of September 30, 2022, SOFR based contracts in the portfolio had Adjustments ranging from 0.10% to 0.26%.

[3] Index based floating interest rate is subject to contractual minimum interest rate. As noted in this schedule, 70% of the loans (based on the par amount) contain LIBOR or Term SOFR (“SOFR”) floors which range between 0.50% and 2.00%, with a weighted-average floor of 1.06%.

[4] The position is unfunded and no interest income is being earned as of September 30, 2022. The position may earn a nominal unused facility fee on committed amounts.

[5] Middle Market portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Middle Market portfolio investments.

[6] Index based floating interest rate is subject to contractual minimum interest rate. As noted in this schedule, 67% of the loans (based on the par amount) contain LIBOR floors which range between 0.50% and 2.00%, with a weighted-average LIBOR floor of 1.06%.

[7] Private Loan portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Private Loan portfolio investments.

[8] Middle Market portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Middle Market portfolio investments.

[9] Non-accrual and non-income producing investment.

[10] Non-accrual and non-income producing investment.

[11] Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable.

[12] The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of Prime plus 5.10% (Floor 2.00%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.

[13] The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of LIBOR plus 7.25% (Floor 1.25%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.

[14] Income producing through dividends or distributions.

[15] Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable.

[16] Shares/Units represent ownership in a related Real Estate or HoldCo entity.

[17] Income producing through dividends or distributions.

[18] Shares/Units represent ownership in a related Real Estate or HoldCo entity.

[19] The security has an effective contractual interest rate of 2.00% PIK + LIBOR+6.50%, Floor 1.00%, but the issuer may, in its discretion, elect to pay the PIK interest in cash. The rate presented represents the effective current yield based on actual payments received during the period.

[20] The security has an effective contractual interest rate of 2.00% PIK + LIBOR+6.50%, Floor 1.00%, but the issuer may, in its discretion, elect to pay the PIK interest in cash. The rate presented represents the effective current yield based on actual payments received during the period.

[21] As of September 30, 2022, borrowings under the loan facility bore interest at SOFR+6.25% (Floor 1.00%). Due to an amendment and subsequent funding during the quarter, the term loan facility has different floating rate reset dates. The rate presented represents a weighted-average rate for borrowings under the facility, as of September 30, 2022.

[22] The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of LIBOR plus 7.96% (Floor 1.00%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.

[23] Index based floating interest rate is subject to contractual maximum index rate of 1.50% as of September 30, 2022.

[24] Index based floating interest rate is subject to contractual maximum index rate of 1.50% as of December 31, 2021.

[25] Investment is not a qualifying asset as defined under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets.

[26] Portfolio company headquarters are located outside of the United States.

[27] Investment is not a qualifying asset as defined under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets.

[28] Portfolio company headquarters are located outside of the United States.

[29] As of December 31, 2021, borrowings under the loan facility bore interest at LIBOR+6.00% or Prime+5.00%. Delayed draw term loan facility permits the borrower to make an interest rate election on each new tranche of borrowings under the facility. The rate presented represents a weighted-average rate for borrowings under the facility.

[30] As of September 30, 2022, borrowings under the loan facility bore interest at LIBOR+6.50% PIK or Prime+5.50% PIK. Revolving facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of September 30, 2022.

[31] As of September 30, 2022, borrowings under the loan facility bore interest at SOFR+6.00% (Floor 1.00%) . Delayed draw term loan facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of September 30, 2022.

[32] Other Portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Other Portfolio investments.

[33] Portfolio company is in a bankruptcy process and, as such, the maturity date of our debt investment in this portfolio company will not be finally determined until such process is complete. As noted in footnote (14), our debt investment in this portfolio company is on non-accrual status.

[34] Portfolio company is in a bankruptcy process and, as such, the maturity date of our debt investment in this portfolio company will not be finally determined until such process is complete. As noted in footnote (14), our debt investment in this portfolio company is on non-accrual status.

[35] In connection with the Company's debt investment in Staples Canada ULC and in an attempt to mitigate any potential adverse change in foreign exchange rates during the term of the Company’s investment, the Company maintains a forward foreign currency contract with Cadence Bank to lend $17.6 million Canadian Dollars and receive $13.6 million U.S. Dollars with a settlement date of September 14, 2023. The unrealized appreciation on the forward foreign currency contract was $0.8 million as of September 30, 2022.

[36] In connection with the Company's debt investment in Staples Canada ULC and in an attempt to mitigate any potential adverse change in foreign exchange rates during the term of the Company's investment, the Company maintains a forward foreign currency contract with Cadence Bank to lend $21.4 million Canadian Dollars and receive $16.9 million U.S. Dollars with a settlement date of September 14, 2022. The unrealized depreciation on the forward foreign currency contract was not significant as of December 31, 2021.

[37] Short-term portfolio investments. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of short-term portfolio investments.

[38] Short-term portfolio investments. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of short-term portfolio investments.

[39] As of September 30, 2022, borrowings under the loan facility bore interest at SOFR+7.25% (Floor 1.00%). Each new draw on the delayed draw term loan facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of September 30, 2022.