Consolidated Schedule of Investments In and Advances to Affiliates (Details)

v3.23.2

Consolidated Schedule of Investments In and Advances to Affiliates (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2023		Jun. 30, 2022		Jun. 30, 2023		Jun. 30, 2022		Dec. 31, 2022
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ (75,506)		$ (5,064)		$ (103,886)		$ (1,728)
Amount of Unrealized Gain/(Loss)		104,941		(24,593)		140,059		(9,841)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[1]					4,102,177
Ending balance		4,210,543		4,210,543	[2]	4,210,543		4,210,543	[2]
Fair value		4,210,543		4,210,543	[2]	4,210,543		4,210,543	[2]	$ 4,102,177	[1]
Control investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		(48,111)		0		(51,077)		0
Amount of Unrealized Gain/(Loss)		75,779		4,822		92,940		13,101
Amount of Interest, Fees or Dividends Credited to Income						96,841		69,385
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,703,172	[1],[3]	1,489,257
Gross Additions						338,651		176,645
Gross Reductions						173,038		85,996
Ending balance		1,883,699	[2],[4]	1,538,158		1,883,699	[2],[4]	1,538,158
Fair value		1,883,699	[2],[4]	1,538,158		1,883,699	[2],[4]	1,538,158		1,703,172	[1],[3]
Control investments | Midwest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		453,692		341,821		453,692		341,821
Fair value		$ 453,692		$ 341,821		$ 453,692		$ 341,821
Net assets, percentage		24.10%		22.20%		24.10%		22.20%
Control investments | Northeast Region and Canada
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 283,469				$ 283,469
Fair value		$ 283,469				$ 283,469
Net assets, percentage		15.00%				15.00%
Control investments | Northeast
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance				$ 140,103				$ 140,103
Fair value				$ 140,103				$ 140,103
Net assets, percentage				9.10%				9.10%
Control investments | Southeast
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 51,394		$ 17,479		$ 51,394		$ 17,479
Fair value		$ 51,394		$ 17,479		$ 51,394		$ 17,479
Net assets, percentage		2.70%		1.10%		2.70%		1.10%
Control investments | Southwest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 655,449		$ 588,039		$ 655,449		$ 588,039
Fair value		$ 655,449		$ 588,039		$ 655,449		$ 588,039
Net assets, percentage		34.80%		38.20%		34.80%		38.20%
Control investments | West
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 439,695		$ 450,716		$ 439,695		$ 450,716
Fair value		$ 439,695		$ 450,716		$ 439,695		$ 450,716
Net assets, percentage		23.30%		29.30%		23.30%		29.30%
Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 9,997		$ 47		$ (16,267)		$ 739
Amount of Unrealized Gain/(Loss)		(11,469)		1,731		21,672		4,772
Amount of Interest, Fees or Dividends Credited to Income						38,455		25,810
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						618,359	[1],[5]	549,214
Gross Additions						175,201		37,832
Gross Reductions						215,521		36,388
Ending balance		563,125	[2],[6]	518,061		563,125	[2],[6]	518,061
Fair value		563,125	[2],[6]	518,061		563,125	[2],[6]	518,061		618,359	[1],[5]
Affiliate investments | Midwest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		78,205		68,747		78,205		68,747
Fair value		$ 78,205		$ 68,747		$ 78,205		$ 68,747
Net assets, percentage		13.90%		13.30%		13.90%		13.30%
Affiliate investments | Northeast Region and Canada
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 102,097				$ 102,097
Fair value		$ 102,097				$ 102,097
Net assets, percentage		18.10%				18.10%
Affiliate investments | Northeast
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance				$ 102,679				$ 102,679
Fair value				$ 102,679				$ 102,679
Net assets, percentage				19.80%				19.80%
Affiliate investments | Southeast
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 172,637		$ 162,554		$ 172,637		$ 162,554
Fair value		$ 172,637		$ 162,554		$ 172,637		$ 162,554
Net assets, percentage		30.70%		31.40%		30.70%		31.40%
Affiliate investments | Southwest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 79,676		$ 103,708		$ 79,676		$ 103,708
Fair value		$ 79,676		$ 103,708		$ 79,676		$ 103,708
Net assets, percentage		14.10%		20.00%		14.10%		20.00%
Affiliate investments | West
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 130,510		$ 80,373		$ 130,510		$ 80,373
Fair value		$ 130,510		$ 80,373		$ 130,510		$ 80,373
Net assets, percentage		23.20%		15.50%		23.20%		15.50%
Investment, Identifier [Axis]: 2717 MH, L.P., LP Interests (2717 HPP-MS, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						67		0
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						248		0
Gross Additions						67		244
Gross Reductions						0		0
Ending balance		$ 315		$ 244		315		244
Fair value		315		244		315		244		248
Investment, Identifier [Axis]: 2717 MH, L.P., LP Interests (2717 MH, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						1,677		0
Amount of Unrealized Gain/(Loss)						(675)		1,408
Amount of Interest, Fees or Dividends Credited to Income						141		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						7,552		3,971
Gross Additions						2,077		2,583
Gross Reductions						3,283		0
Ending balance		6,346		6,554		6,346		6,554
Fair value		6,346		6,554		6,346		6,554		7,552
Investment, Identifier [Axis]: 423 HAR, LP, LP Interests (423 HAR, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						750
Gross Reductions						0
Ending balance		750				750
Fair value		750				750				0
Investment, Identifier [Axis]: AAC Holdings, Inc., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		(1,279)
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	[7]	2,079
Gross Additions						0		0
Gross Reductions						0		1,279
Ending balance		0	[8]	800		0	[8]	800
Fair value		$ 0	[8]	$ 800		0	[8]	$ 800		$ 0	[7]
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate				18.00%				18.00%		18.00%	[7]
PIK Rate				8.00%				8.00%		18.00%	[7]
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								(150)
Amount of Interest, Fees or Dividends Credited to Income								970
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						$ 11,550	[7]	9,794
Gross Additions								296
Gross Reductions								0
Ending balance				$ 10,090				10,090
Fair value				10,090				10,090		$ 11,550	[7]
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[8]	18.00%				18.00%
PIK Rate	[8]	18.00%				18.00%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(16)
Amount of Interest, Fees or Dividends Credited to Income						27
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						376
Gross Reductions						16
Ending balance	[8]	$ 360				360
Fair value		$ 360	[8]			$ 360	[8]			0
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[8]	18.00%				18.00%
PIK Rate	[8]	18.00%				18.00%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(558)
Amount of Interest, Fees or Dividends Credited to Income						1,149
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						11,550
Gross Additions						1,149
Gross Reductions						558
Ending balance	[8]	$ 12,141				12,141
Fair value		12,141	[8]			12,141	[8]			11,550
Investment, Identifier [Axis]: AAC Holdings, Inc., Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		(1,200)
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	[7],[9]	1,940
Gross Additions						0		0
Gross Reductions						0		1,200
Ending balance		0	[8],[10]	740		0	[8],[10]	740
Fair value		$ 0	[8],[10]	740		$ 0	[8],[10]	740		$ 0	[7],[9]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Spread		5.00%	[11],[12],[13]			5.00%	[11],[12],[13]			6.00%	[14],[15],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ (39)
Ending balance	[11],[12],[13]	$ (68)				(68)
Fair value		$ (68)	[11],[12],[13]			$ (68)	[11],[12],[13]			$ (39)	[14],[15],[16],[17]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[14],[15],[16]									10.20%
Spread		6.00%	[11],[12],[13],[18]			6.00%	[11],[12],[13],[18]			6.00%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 741
Ending balance	[11],[12],[13],[18]	$ 0				0
Fair value		$ 0	[11],[12],[13],[18]			$ 0	[11],[12],[13],[18]			$ 741	[14],[15],[16]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.20%	[11],[12],[18]			11.20%	[11],[12],[18]			10.58%	[14],[15],[16]
Spread		6.00%	[11],[12],[18]			6.00%	[11],[12],[18]			6.00%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 17,052
Ending balance	[11],[12],[18]	$ 21,296				21,296
Fair value		$ 21,296	[11],[12],[18]			$ 21,296	[11],[12],[18]			$ 17,052	[14],[15],[16]
Investment, Identifier [Axis]: ADS Tactical, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.94%	[8],[12],[18]			10.94%	[8],[12],[18]			10.14%	[7],[16]
Spread		5.75%	[8],[12],[18]			5.75%	[8],[12],[18]			5.75%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]					$ 18,969
Ending balance	[8],[12],[18]	$ 19,492				19,492
Fair value		19,492	[8],[12],[18]			19,492	[8],[12],[18]			$ 18,969	[7],[16]
Investment, Identifier [Axis]: AFG Capital Group, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						7,200		0
Amount of Unrealized Gain/(Loss)						(8,200)		1,040
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						9,400	[19]	7,740
Gross Additions						7,200		1,040
Gross Reductions						16,600		0
Ending balance		0		8,780		0		8,780
Fair value		0		$ 8,780		0		$ 8,780		9,400	[19]
Investment, Identifier [Axis]: AFG Capital Group, LLC, Secured Debt
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								144
Gross Additions								0
Gross Reductions								144
Ending balance				$ 0				0
Fair value				0				0
Investment, Identifier [Axis]: AMEREQUIP LLC., Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					1,779
Ending balance	[11],[20]	1,930				1,930
Fair value		$ 1,930	[11],[20]			$ 1,930	[11],[20]			$ 1,779	[14]
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 1
Schedule of Investments [Line Items]
Spread		7.40%	[11],[12],[13],[18]			7.40%	[11],[12],[13],[18]			7.40%	[14],[15],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ (137)
Ending balance	[11],[12],[13],[18]	$ (122)				(122)
Fair value		$ (122)	[11],[12],[13],[18]			$ (122)	[11],[12],[13],[18]			$ (137)	[14],[15],[16],[17]
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.70%	[11],[12],[18]			12.70%	[11],[12],[18]			11.72%	[14],[15],[16]
Spread		7.40%	[11],[12],[18]			7.40%	[11],[12],[18]			7.40%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 37,463
Ending balance	[11],[12],[18]	$ 37,264				37,264
Fair value		37,264	[11],[12],[18]			37,264	[11],[12],[18]			$ 37,463	[14],[15],[16]
Investment, Identifier [Axis]: ASC Interests, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(384)		80
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						800		720
Gross Additions						94		80
Gross Reductions						384		0
Ending balance		510		800		510		800
Fair value		$ 510		$ 800		$ 510		$ 800		$ 800
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.00%		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						27		13
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						400		200
Gross Additions						0		0
Gross Reductions						0		30
Ending balance		$ 400		$ 170		400		170
Fair value		$ 400		$ 170		$ 400		$ 170		$ 400
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.00%		13.00%		13.00%		13.00%		13.00%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(52)		0
Amount of Interest, Fees or Dividends Credited to Income						108		120
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,649		1,636
Gross Additions						0		12
Gross Reductions						52		0
Ending balance		$ 1,597		$ 1,648		1,597		1,648
Fair value		1,597		$ 1,648		1,597		$ 1,648		$ 1,649
Investment, Identifier [Axis]: ATS Operating, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					660
Ending balance	[11]	660				660
Fair value		$ 660	[11]			$ 660	[11]			$ 660	[14]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	11.75%				11.75%
Spread		6.50%	[11],[12],[18]			6.50%	[11],[12],[18]			5.50%	[14],[15],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ 0
Ending balance	[11],[12],[18]	$ 720				720
Fair value		$ 720	[11],[12],[18]			$ 720	[11],[12],[18]			$ 0	[14],[15],[16],[17]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.65%	[11],[12],[18]			10.65%	[11],[12],[18]			9.32%	[14],[15],[16]
Spread		5.50%	[11],[12],[18]			5.50%	[11],[12],[18]			5.50%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 6,582
Ending balance	[11],[12],[18]	$ 6,660				6,660
Fair value		$ 6,660	[11],[12],[18]			$ 6,660	[11],[12],[18]			$ 6,582	[14],[15],[16]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.65%	[11],[12],[18]			12.65%	[11],[12],[18]			11.32%	[14],[15],[16]
Spread		7.50%	[11],[12],[18]			7.50%	[11],[12],[18]			7.50%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 6,593
Ending balance	[11],[12],[18]	$ 6,660				6,660
Fair value		6,660	[11],[12],[18]			6,660	[11],[12],[18]			$ 6,593	[14],[15],[16]
Investment, Identifier [Axis]: ATS Workholding, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[11]	0				0
Fair value		$ 0	[11]			$ 0	[11]			$ 0	[14]
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt
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								0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								3,005
Gross Additions								0
Gross Reductions								66
Ending balance				$ 2,939				2,939
Fair value				$ 2,939				$ 2,939
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		5.00%	[11],[21]			5.00%	[11],[21]			5.00%	[14],[22]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(277)
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[22]					634
Gross Additions						126
Gross Reductions						277
Ending balance	[11],[21]	$ 483				483
Fair value		$ 483	[11],[21]			$ 483	[11],[21]			$ 634	[14],[22]
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		5.00%	[11],[21]			5.00%	[11],[21]			5.00%	[14],[22]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(286)
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[22]					1,005
Gross Additions						0
Gross Reductions						286
Ending balance	[11],[21]	$ 719				719
Fair value		719	[11],[21]			719	[11],[21]			$ 1,005	[14],[22]
Investment, Identifier [Axis]: ATX Networks Corp., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						3,248
Amount of Unrealized Gain/(Loss)						(3,270)
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]					3,270
Gross Additions						3,248
Gross Reductions						6,518
Ending balance		0				0
Fair value		$ 0				$ 0				$ 3,270	[7]
Investment, Identifier [Axis]: ATX Networks Corp., Secured Debt
Schedule of Investments [Line Items]
Total Rate				8.92%				8.92%		12.23%	[7],[16]
Spread		7.50%		7.50%		7.50%		7.50%		7.50%	[7],[16]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(134)		(309)
Amount of Interest, Fees or Dividends Credited to Income						886		388
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						6,343	[7],[16]	7,092
Gross Additions						575		228
Gross Reductions						6,918		1,133
Ending balance		$ 0		$ 6,187		0		6,187
Fair value		0		$ 6,187		0		$ 6,187		$ 6,343	[7],[16]
Investment, Identifier [Axis]: ATX Networks Corp., Unsecured Debt
Schedule of Investments [Line Items]
Total Rate				10.00%				10.00%		10.00%	[7]
PIK Rate				10.00%				10.00%		10.00%	[7]
Amount of Realized Gain/(Loss)						0		$ 0
Amount of Unrealized Gain/(Loss)						(306)		120
Amount of Interest, Fees or Dividends Credited to Income						1,160		159
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						2,598	[7]	1,963
Gross Additions						1,160		437
Gross Reductions						3,758		158
Ending balance		0		$ 2,242		0		2,242
Fair value		0		2,242		0		2,242		$ 2,598	[7]
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					406
Ending balance	[11]	1,011				1,011
Fair value		$ 1,011	[11]			$ 1,011	[11]			$ 406	[14]
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	12.63%				12.63%
Spread		7.25%	[11],[12],[18]			7.25%	[11],[12],[18]			7.25%	[14],[15],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ (57)
Ending balance	[11],[12],[18]	$ 1,425				1,425
Fair value		$ 1,425	[11],[12],[18]			$ 1,425	[11],[12],[18]			$ (57)	[14],[15],[16],[17]
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.65%	[11],[12],[18]			12.65%	[11],[12],[18]			12.17%	[14],[15],[16]
Spread		7.25%	[11],[12],[18]			7.25%	[11],[12],[18]			7.25%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 27,927
Ending balance	[11],[12],[18]	$ 18,714				18,714
Fair value		$ 18,714	[11],[12],[18]			$ 18,714	[11],[12],[18]			$ 27,927	[14],[15],[16]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.75%	[11],[12]			15.75%	[11],[12]			13.23%	[14],[16]
Spread		7.50%	[11],[12]			7.50%	[11],[12]			8.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 1,678
Ending balance	[11],[12]	$ 1,678				1,678
Fair value		$ 1,678	[11],[12]			$ 1,678	[11],[12]			$ 1,678	[14],[16]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.75%	[11],[12]			15.75%	[11],[12]			13.23%	[14],[16]
Spread		7.50%	[11],[12]			7.50%	[11],[12]			8.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 9,891
Ending balance	[11],[12]	$ 9,620				9,620
Fair value		$ 9,620	[11],[12]			$ 9,620	[11],[12]			$ 9,891	[14],[16]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		19.75%	[11],[12]			19.75%	[11],[12]			16.17%	[14],[16]
Spread		11.50%	[11],[12]			11.50%	[11],[12]			12.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 807
Ending balance	[11],[12]	$ 785				785
Fair value		$ 785	[11],[12]			$ 785	[11],[12]			$ 807	[14],[16]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[14],[16]									13.88%
Spread		7.50%	[11],[12],[13],[18]			7.50%	[11],[12],[13],[18]			9.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 14,618
Ending balance	[11],[12],[13],[18]	$ (30)				(30)
Fair value		$ (30)	[11],[12],[13],[18]			$ (30)	[11],[12],[13],[18]			$ 14,618	[14],[16]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.85%	[11],[12],[18]			12.85%	[11],[12],[18]			13.57%	[14],[16]
Spread		7.50%	[11],[12],[18]			7.50%	[11],[12],[18]			9.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 4,368
Ending balance	[11],[12],[18]	$ 43,162				43,162
Fair value		43,162	[11],[12],[18]			43,162	[11],[12],[18]			$ 4,368	[14],[16]
Investment, Identifier [Axis]: Acumera, Inc., Warrants
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[23]	0				0
Fair value	[11],[23]	$ 0				$ 0
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.00%	[11],[12],[18],[24]			10.00%	[11],[12],[18],[24]			10.00%	[14],[16],[25]
Spread		7.00%	[11],[12],[18],[24]			7.00%	[11],[12],[18],[24]			6.00%	[14],[16],[25]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[25]					$ 4,729
Ending balance	[11],[12],[18],[24]	$ 6,976				6,976
Fair value		$ 6,976	[11],[12],[18],[24]			$ 6,976	[11],[12],[18],[24]			$ 4,729	[14],[16],[25]
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.00%	[11],[12],[18],[24]			10.00%	[11],[12],[18],[24]			10.00%	[14],[16],[25]
Spread		7.00%	[11],[12],[18],[24]			7.00%	[11],[12],[18],[24]			7.50%	[14],[16],[25]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[25]					$ 24,086
Ending balance	[11],[12],[18],[24]	$ 22,383				22,383
Fair value		$ 22,383	[11],[12],[18],[24]			$ 22,383	[11],[12],[18],[24]			$ 24,086	[14],[16],[25]
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.00%	[11],[12],[13]			6.00%	[11],[12],[13]			6.00%	[14],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[17]					$ (10)
Ending balance	[11],[12],[13]	$ (9)				(9)
Fair value		$ (9)	[11],[12],[13]			$ (9)	[11],[12],[13]			$ (10)	[14],[16],[17]
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.43%	[11],[12]			11.43%	[11],[12]			11.12%	[14],[16]
Spread		6.00%	[11],[12]			6.00%	[11],[12]			6.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 6,617
Ending balance	[11],[12]	$ 6,583				6,583
Fair value		$ 6,583	[11],[12]			$ 6,583	[11],[12]			$ 6,617	[14],[16]
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.79%	[11],[12],[18]			11.79%	[11],[12],[18]			10.46%	[14],[15],[16]
Spread		6.75%	[11],[12],[18]			6.75%	[11],[12],[18]			6.75%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 14,606
Ending balance	[11],[12],[18]	$ 12,216				12,216
Fair value		$ 12,216	[11],[12],[18]			$ 12,216	[11],[12],[18]			$ 14,606	[14],[15],[16]
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.79%	[11],[12],[18],[21]			14.79%	[11],[12],[18],[21]			12.46%	[14],[15],[16]
Spread		8.75%	[11],[12],[18],[21]			8.75%	[11],[12],[18],[21]			8.75%	[14],[15],[16]
PIK Rate	[11],[12],[18],[21]	1.00%				1.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 14,654
Ending balance	[11],[12],[18],[21]	$ 10,618				10,618
Fair value		$ 10,618	[11],[12],[18],[21]			$ 10,618	[11],[12],[18],[21]			$ 14,654	[14],[15],[16]
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		7.50%	[8],[21],[26]			7.50%	[8],[21],[26]			7.50%	[7],[22]
Spread		6.50%	[8],[21],[26]			6.50%	[8],[21],[26]			6.50%	[7],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[22]					$ 168
Ending balance	[8],[21],[26]	$ 135				135
Fair value		$ 135	[8],[21],[26]			$ 135	[8],[21],[26]			$ 168	[7],[22]
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		7.50%	[8],[12],[21],[26]			7.50%	[8],[12],[21],[26]			7.50%	[7],[16],[22]
Spread		6.50%	[8],[12],[21],[26]			6.50%	[8],[12],[21],[26]			6.50%	[7],[16],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16],[22]					$ 808
Ending balance	[8],[12],[21],[26]	$ 647				647
Fair value		647	[8],[12],[21],[26]			647	[8],[12],[21],[26]			$ 808	[7],[16],[22]
Investment, Identifier [Axis]: Amounts related to investments transferred to or from other 1940 Act classification during the period, Affiliate Investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		139
Amount of Interest, Fees or Dividends Credited to Income						171		1,302
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						14,914		32,597
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		0		0		0		0
Fair value		0		0		0		0		14,914
Investment, Identifier [Axis]: Amounts related to investments transferred to or from other 1940 Act classification during the period, Control Investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						(171)		57
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						(14,914)		41,748
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		0		0		0		0
Fair value		$ 0		0		$ 0		0		$ (14,914)
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								(576)
Amount of Interest, Fees or Dividends Credited to Income								0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								4,894
Gross Additions								0
Gross Reductions								576
Ending balance				4,318				4,318
Fair value				$ 4,318				$ 4,318
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Total Rate		14.13%				14.13%				14.13%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		$ 0				0
Fair value		0				0				$ 0
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						566
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						3,504
Gross Additions						566
Gross Reductions						0
Ending balance		4,070				4,070
Fair value		$ 4,070				$ 4,070				$ 3,504
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt
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								339
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								4,736
Gross Additions								45
Gross Reductions								140
Ending balance				$ 4,641				4,641
Fair value				4,641				4,641
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		10.00%	[12],[13]			10.00%	[12],[13]			10.00%	[16],[17]
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	[16],[17]					(3)
Gross Additions						1
Gross Reductions						0
Ending balance	[12],[13]	$ (2)				(2)
Fair value		$ (2)	[12],[13]			$ (2)	[12],[13]			$ (3)	[16],[17]
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.25%	[12]			15.25%	[12]			14.13%	[16]
Spread		10.00%	[12]			10.00%	[12]			10.00%	[16]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						379
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16]					4,545
Gross Additions						39
Gross Reductions						140
Ending balance	[12]	$ 4,444				4,444
Fair value		4,444	[12]			4,444	[12]			$ 4,545	[16]
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[9]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[10]	0				0
Fair value		0	[10]			0	[10]			0	[9]
Investment, Identifier [Axis]: ArborWorks, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					0
Ending balance	[11]	0				0
Fair value		$ 0	[11]			$ 0	[11]			$ 0	[14]
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.25%	[11],[12],[18]			15.25%	[11],[12],[18]			13.41%	[14],[16]
Spread		7.00%	[11],[12],[18]			7.00%	[11],[12],[18]			9.00%	[14],[16]
PIK Rate	[11],[12],[18]	3.00%				3.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 3,945
Ending balance	[11],[12],[18]	$ 3,799				3,799
Fair value		$ 3,799	[11],[12],[18]			$ 3,799	[11],[12],[18]			$ 3,945	[14],[16]
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.23%	[11],[12],[18]			15.23%	[11],[12],[18]			13.56%	[14],[16]
Spread		7.00%	[11],[12],[18]			7.00%	[11],[12],[18]			9.00%	[14],[16]
PIK Rate	[11],[12],[18]	14.40%				14.40%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 25,065
Ending balance	[11],[12],[18]	$ 22,962				22,962
Fair value		22,962	[11],[12],[18]			22,962	[11],[12],[18]			$ 25,065	[14],[16]
Investment, Identifier [Axis]: Archer Systems, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					1,388
Ending balance	[11]	1,940				1,940
Fair value		$ 1,940	[11]			$ 1,940	[11]			$ 1,388	[14]
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.00%	[11],[12],[13],[18]			6.00%	[11],[12],[13],[18]			6.50%	[14],[15],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ (135)
Ending balance	[11],[12],[13],[18]	$ (121)				(121)
Fair value		$ (121)	[11],[12],[13],[18]			$ (121)	[11],[12],[13],[18]			$ (135)	[14],[15],[16],[17]
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.39%	[11],[12],[18]			11.39%	[11],[12],[18]			10.92%	[14],[15],[16]
Spread		6.00%	[11],[12],[18]			6.00%	[11],[12],[18]			6.50%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 66,511
Ending balance	[11],[12],[18]	$ 52,846				52,846
Fair value		52,846	[11],[12],[18]			52,846	[11],[12],[18]			$ 66,511	[14],[15],[16]
Investment, Identifier [Axis]: Arrow International, Inc, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[14],[15],[16],[27]									10.36%
Spread	[14],[15],[16],[27]									6.60%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[27]					36,000
Fair value	[14],[15],[16],[27]									$ 36,000
Investment, Identifier [Axis]: BBB Tank Services, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0		0
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		0		0		0		0
Fair value		$ 0		0		$ 0		0		$ 0
Investment, Identifier [Axis]: BBB Tank Services, LLC, Preferred Stock (non-voting)
Schedule of Investments [Line Items]
Total Rate		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						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
Fair value		$ 0		$ 0		$ 0		$ 0		$ 0
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt
Schedule of Investments [Line Items]
Total Rate				12.06%				12.06%
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								290
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								2,507
Gross Additions								0
Gross Reductions								209
Ending balance				$ 2,298				2,298
Fair value				2,298				2,298
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 1
Schedule of Investments [Line Items]
Total Rate		16.17%	[12],[26]			16.17%	[12],[26]			15.12%	[16],[28]
Spread		11.00%	[12],[26]			11.00%	[12],[26]			11.00%	[16],[28]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						63
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16],[28]					800
Gross Additions						0
Gross Reductions						0
Ending balance	[12],[26]	$ 800				800
Fair value		$ 800	[12],[26]			$ 800	[12],[26]			$ 800	[16],[28]
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 2
Schedule of Investments [Line Items]
Total Rate		16.17%	[12],[26]			16.17%	[12],[26]			15.12%	[16],[28]
Spread		11.00%	[12],[26]			11.00%	[12],[26]			11.00%	[16],[28]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						116
Amount of Interest, Fees or Dividends Credited to Income						317
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16],[28]					2,086
Gross Additions						116
Gross Reductions						0
Ending balance	[12],[26]	$ 2,202				2,202
Fair value		2,202	[12],[26]			2,202	[12],[26]			$ 2,086	[16],[28]
Investment, Identifier [Axis]: Barfly Ventures, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(280)		470
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						3,320	[14]	1,930
Gross Additions						0		470
Gross Reductions						280		0
Ending balance		3,040	[11]	2,400		3,040	[11]	2,400
Fair value		$ 3,040	[11]	$ 2,400		$ 3,040	[11]	$ 2,400		$ 3,320	[14]
Investment, Identifier [Axis]: Barfly Ventures, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		7.00%	[11]	7.00%		7.00%	[11]	7.00%		7.00%	[14]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						44		25
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						711	[14]	711
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		$ 711	[11]	$ 711		711	[11]	711
Fair value		711	[11]	711		711	[11]	711		$ 711	[14]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								0
Gross Additions								4,073
Gross Reductions								0
Ending balance				4,073				4,073
Fair value				$ 4,073				$ 4,073
Investment, Identifier [Axis]: Batjer TopCo, LLC, Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						2,055
Amount of Interest, Fees or Dividends Credited to Income						574
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19]					4,095
Gross Additions						2,055
Gross Reductions						0
Ending balance	[20]	6,150				6,150
Fair value		6,150	[20]			6,150	[20]			4,095	[19]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt
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								512
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								0
Gross Additions								11,372
Gross Reductions								459
Ending balance				$ 10,913				10,913
Fair value				10,913				10,913
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						7
Amount of Interest, Fees or Dividends Credited to Income						1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[17]					(8)
Gross Additions						8
Gross Reductions						0
Ending balance	[13]	0				0
Fair value		$ 0	[13]			$ 0	[13]			(8)	[17]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.00%				10.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[17]					$ 0
Ending balance		$ 10,575				10,575
Fair value		10,575				10,575				0	[17]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 2.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		0				0
Fair value		$ 0				$ 0				$ 0
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.00%				10.00%				11.00%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						78
Amount of Interest, Fees or Dividends Credited to Income						583
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						10,933
Gross Additions						92
Gross Reductions						450
Ending balance		$ 10,575				10,575
Fair value		10,575				10,575				$ 10,933
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 1
Schedule of Investments [Line Items]
Total Rate	[14],[19],[29]									8.00%
PIK Rate	[14],[19],[29]									8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[19],[29]					4,561
Ending balance	[11],[20],[30]	3,940				3,940
Fair value		3,940	[11],[20],[30]			3,940	[11],[20],[30]			$ 4,561	[14],[19],[29]
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 2
Schedule of Investments [Line Items]
PIK Rate	[14],[17],[19],[29]									16.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[17],[19],[29]					270
Ending balance	[11],[20],[30]	310				310
Fair value		$ 310	[11],[20],[30]			310	[11],[20],[30]			$ 270	[14],[17],[19],[29]
Investment, Identifier [Axis]: Berry Aviation, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[14]									12.00%
PIK Rate	[14]									1.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					$ 195
Fair value	[14]									$ 195
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		7.00%	[11],[12],[13],[18]			7.00%	[11],[12],[13],[18]			1.00%	[14],[15],[16],[17]
PIK Rate	[14],[15],[16],[17]									6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ (76)
Ending balance	[11],[12],[13],[18]	$ (69)				(69)
Fair value		$ (69)	[11],[12],[13],[18]			$ (69)	[11],[12],[13],[18]			$ (76)	[14],[15],[16],[17]
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.26%	[11],[12],[18]			12.26%	[11],[12],[18]			11.40%	[14],[15],[16]
Spread		7.00%	[11],[12],[18]			7.00%	[11],[12],[18]			1.00%	[14],[15],[16]
PIK Rate		6.00%	[11],[12],[18]			6.00%	[11],[12],[18]			6.00%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 27,505
Ending balance	[11],[12],[18]	$ 28,345				28,345
Fair value		28,345	[11],[12],[18]			28,345	[11],[12],[18]			$ 27,505	[14],[15],[16]
Investment, Identifier [Axis]: Binswanger Enterprises, LLC, Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					420
Ending balance	[11]	180				180
Fair value		180	[11]			180	[11]			420	[14]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[19]					4,860
Ending balance	[8]	2,265				2,265
Fair value		$ 2,265	[8]			$ 2,265	[8]			$ 4,860	[7],[19]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[8],[12]	15.75%				15.75%
Spread		7.50%	[8],[12]			7.50%	[8],[12]			8.50%	[7],[16],[17]
PIK Rate	[8],[12]	14.75%				14.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16],[17]					$ 0
Ending balance	[8],[12]	$ 1,333				1,333
Fair value		$ 1,333	[8],[12]			$ 1,333	[8],[12]			$ 0	[7],[16],[17]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.77%	[8],[12],[18]			13.77%	[8],[12],[18]			12.94%	[7],[16]
Spread		8.50%	[8],[12],[18]			8.50%	[8],[12],[18]			8.50%	[7],[16]
PIK Rate	[8],[12],[18]	12.77%				12.77%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]					$ 3,139
Ending balance	[8],[12],[18]	$ 3,210				3,210
Fair value		3,210	[8],[12],[18]			3,210	[8],[12],[18]			$ 3,139	[7],[16]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Warrants
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[9]					1,095
Ending balance	[8],[10]	510				510
Fair value		510	[8],[10]			510	[8],[10]			1,095	[7],[9]
Investment, Identifier [Axis]: Boccella Precast Products LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(620)		(320)
Amount of Interest, Fees or Dividends Credited to Income						41		70
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						2,970	[19]	4,830
Gross Additions						0		0
Gross Reductions						620		320
Ending balance		2,350		4,510		2,350		4,510
Fair value		$ 2,350		$ 4,510		$ 2,350		$ 4,510		$ 2,970	[19]
Investment, Identifier [Axis]: Boccella Precast Products LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.00%		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						16		16
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						320		320
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		$ 320		$ 320		320		320
Fair value		$ 320		320		$ 320		320		$ 320
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Class B Preferred Member Units
Schedule of Investments [Line Items]
Total Rate		8.00%	[20]			8.00%	[20]			8.00%	[19]
Amount of Realized Gain/(Loss)						$ 0		0
Amount of Unrealized Gain/(Loss)						(300)		2,760
Amount of Interest, Fees or Dividends Credited to Income						2,137		276
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						31,420	[19]	23,170
Gross Additions						0		2,760
Gross Reductions						300		0
Ending balance		$ 31,120	[20]	25,930		31,120	[20]	25,930
Fair value		$ 31,120	[20]	$ 25,930		$ 31,120	[20]	$ 25,930		$ 31,420	[19]
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.37%	[12],[18],[31]	10.50%		14.37%	[12],[18],[31]	10.50%		13.39%	[15],[16],[32]
Spread		9.19%	[12],[18],[31]	9.00%		9.19%	[12],[18],[31]	9.00%		9.26%	[15],[16],[32]
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								(39)
Amount of Interest, Fees or Dividends Credited to Income								2,491
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						$ 99,194	[15],[16],[32]	39,000
Gross Additions								10,233
Gross Reductions								39
Ending balance		$ 97,875	[12],[18],[31]	$ 49,194		97,875	[12],[18],[31]	49,194
Fair value		97,875	[12],[18],[31]	49,194		97,875	[12],[18],[31]	49,194		$ 99,194	[15],[16],[32]
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		0				0
Fair value		$ 0				$ 0				0
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.37%				14.37%
Spread		9.19%				9.19%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(71)
Amount of Interest, Fees or Dividends Credited to Income						6,976
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						99,194
Gross Additions						71
Gross Reductions						1,390
Ending balance		$ 97,875				97,875
Fair value		97,875				97,875				$ 99,194
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[33],[34]	571				571
Fair value	[11],[33],[34]	$ 571				$ 571
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[11],[12],[13],[18],[33],[34]	7.00%				7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[13],[18],[33],[34]	$ (28)				$ (28)
Fair value	[11],[12],[13],[18],[33],[34]	$ (28)				$ (28)
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18],[33],[34]	11.19%				11.19%
Spread	[11],[12],[18],[33],[34]	6.00%				6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18],[33],[34]	$ 6,297				$ 6,297
Fair value	[11],[12],[18],[33],[34]	$ 6,297				$ 6,297
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18],[33],[34]	13.19%				13.19%
Spread	[11],[12],[18],[33],[34]	8.00%				8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18],[33],[34]	$ 6,297				$ 6,297
Fair value	[11],[12],[18],[33],[34]	$ 6,297				$ 6,297
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.50%	[11],[12],[21],[26]			12.50%	[11],[12],[21],[26]			12.50%	[14],[16],[22],[28]
Spread		9.25%	[11],[12],[21],[26]			9.25%	[11],[12],[21],[26]			9.25%	[14],[16],[22],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[22],[28]					$ 761
Ending balance	[11],[12],[21],[26]	$ 761				761
Fair value		$ 761	[11],[12],[21],[26]			$ 761	[11],[12],[21],[26]			$ 761	[14],[16],[22],[28]
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%	[11],[12],[21],[26]			12.50%	[11],[12],[21],[26]			12.50%	[14],[16],[22],[28]
Spread		9.25%	[11],[12],[21],[26]			9.25%	[11],[12],[21],[26]			9.25%	[14],[16],[22],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[22],[28]					$ 2,916
Ending balance	[11],[12],[21],[26]	$ 1,382				1,382
Fair value		1,382	[11],[12],[21],[26]			1,382	[11],[12],[21],[26]			$ 2,916	[14],[16],[22],[28]
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(720)		(660)
Amount of Interest, Fees or Dividends Credited to Income						60		530
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						7,080	[19]	7,710
Gross Additions						0		0
Gross Reductions						720		660
Ending balance		6,360	[20]	7,050		6,360	[20]	7,050
Fair value		$ 6,360	[20]	$ 7,050		$ 6,360	[20]	$ 7,050		$ 7,080	[19]
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15.17%	[12]	11.06%		15.17%	[12]	11.06%		14.12%	[16]
Spread		10.00%	[12]	10.00%		10.00%	[12]	10.00%		10.00%	[16]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(63)		0
Amount of Interest, Fees or Dividends Credited to Income						429		448
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						5,964	[16]	8,037
Gross Additions						0		12
Gross Reductions						311		248
Ending balance		$ 5,653	[12]	$ 7,801		5,653	[12]	7,801
Fair value		5,653	[12]	7,801		5,653	[12]	7,801		$ 5,964	[16]
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						50		50
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,000	[19],[29]	1,000
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		1,000		1,000		1,000		1,000
Fair value		1,000		$ 1,000		1,000		$ 1,000		$ 1,000	[19],[29]
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Preferred Member Units 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[20],[30]	1,000				1,000
Fair value	[20],[30]	$ 1,000				$ 1,000
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.00%		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						576		576
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						8,813		8,813
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		$ 8,813		$ 8,813		8,813		8,813
Fair value		$ 8,813		$ 8,813		$ 8,813		$ 8,813		$ 8,813
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.00%	[30]	13.00%		13.00%	[30]	13.00%		13.00%	[29]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						65		65
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,000	[29]	1,000
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		$ 1,000	[30]	$ 1,000		1,000	[30]	1,000
Fair value		1,000	[30]	1,000		1,000	[30]	1,000		$ 1,000	[29]
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								200
Amount of Interest, Fees or Dividends Credited to Income								0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						4,340	[9]	4,060
Gross Additions								200
Gross Reductions								0
Ending balance		4,450	[10]	4,260		4,450	[10]	4,260
Fair value		4,450	[10]	$ 4,260		4,450	[10]	$ 4,260		4,340	[9]
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						46
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,828
Gross Additions						46
Gross Reductions						0
Ending balance		1,874				1,874
Fair value		1,874				1,874				1,828
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						64
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						2,512
Gross Additions						64
Gross Reductions						0
Ending balance		2,576				2,576
Fair value		2,576				2,576				2,512
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund III, LP)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19],[35],[36],[37]					4,727
Ending balance	[33],[38],[39]	4,586				4,586
Fair value		4,586	[33],[38],[39]			4,586	[33],[38],[39]			4,727	[19],[35],[36],[37]
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund IV, LP)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19],[35],[36],[37]					4,541
Ending balance	[20],[33],[38],[39]	4,589				4,589
Fair value		4,589	[20],[33],[38],[39]			4,589	[20],[33],[38],[39]			4,541	[19],[35],[36],[37]
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund V, LP)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[35],[36],[37]					2,229
Ending balance	[20],[33],[38],[39]	2,331				2,331
Fair value		$ 2,331	[20],[33],[38],[39]			$ 2,331	[20],[33],[38],[39]			$ 2,229	[35],[36],[37]
Investment, Identifier [Axis]: Buca C, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Total Rate		6.00%				6.00%				6.00%
PIK Rate		6.00%				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
Fair value		$ 0				$ 0				$ 0
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.00%		10.37%		12.00%		10.37%		9.00%
Spread				9.25%				9.25%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						1,044		1,036
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						12,337		14,370
Gross Additions						0		0
Gross Reductions						373		1,221
Ending balance		$ 11,964		$ 13,149		11,964		13,149
Fair value		$ 11,964		13,149		$ 11,964		13,149		$ 12,337
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	10.20%				10.20%
Spread		5.00%	[11],[12],[18]			5.00%	[11],[12],[18]			5.00%	[14],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[17]					$ 0
Ending balance	[11],[12],[18]	$ 774				774
Fair value		$ 774	[11],[12],[18]			$ 774	[11],[12],[18]			$ 0	[14],[16],[17]
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.20%	[11],[12],[18]			10.20%	[11],[12],[18]			8.91%	[14],[16]
Spread		5.00%	[11],[12],[18]			5.00%	[11],[12],[18]			5.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 19,933
Ending balance	[11],[12],[18]	$ 19,782				19,782
Fair value		19,782	[11],[12],[18]			19,782	[11],[12],[18]			$ 19,933	[14],[16]
Investment, Identifier [Axis]: CAI Software LLC, Preferred Equity 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19]					1,789
Ending balance		1,789				1,789
Fair value		1,789				1,789				1,789	[19]
Investment, Identifier [Axis]: CAI Software LLC, Preferred Equity 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Ending balance		0				0
Fair value		0				0				0
Investment, Identifier [Axis]: CBT Nuggets, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						1,570		(2,720)
Amount of Interest, Fees or Dividends Credited to Income						1,647		1,647
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						49,002	[19]	50,620
Gross Additions						1,568		0
Gross Reductions						0		2,720
Ending balance		50,570	[20]	47,900		50,570	[20]	47,900
Fair value		50,570	[20]	47,900		50,570	[20]	47,900		49,002	[19]
Investment, Identifier [Axis]: CMS Minerals Investments, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						99		0
Amount of Unrealized Gain/(Loss)						(366)		447
Amount of Interest, Fees or Dividends Credited to Income						44		69
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,670	[19],[29]	1,974
Gross Additions						99		447
Gross Reductions						1,769		147
Ending balance		0		2,274		0		2,274
Fair value		$ 0		2,274		0		2,274		$ 1,670	[19],[29]
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[14],[16],[40]									11.99%
Spread	[14],[16],[40]									8.50%
PIK Rate	[14],[16],[40]									0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[40]					$ 28,328
Fair value	[14],[16],[40]									$ 28,328
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	13.91%				13.91%
Spread	[11],[12],[18]	6.50%				6.50%
PIK Rate	[11],[12],[18]	2.00%				2.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18]	$ 5,044				$ 5,044
Fair value	[11],[12],[18]	$ 5,044				$ 5,044
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	13.91%				13.91%
Spread	[11],[12],[18]	6.50%				6.50%
PIK Rate	[11],[12],[18]	2.00%				2.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18]	$ 1,569				$ 1,569
Fair value	[11],[12],[18]	$ 1,569				$ 1,569
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	13.91%				13.91%
Spread	[11],[12],[18]	6.50%				6.50%
PIK Rate	[11],[12],[18]	2.00%				2.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18]	$ 2,064				$ 2,064
Fair value	[11],[12],[18]	$ 2,064				$ 2,064
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	13.91%				13.91%
Spread	[11],[12],[18]	6.50%				6.50%
PIK Rate	[11],[12],[18]	2.00%				2.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18]	$ 594				$ 594
Fair value	[11],[12],[18]	594				594
Investment, Identifier [Axis]: Café Brazil, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(80)		(50)
Amount of Interest, Fees or Dividends Credited to Income						103		99
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						2,210	[19]	2,570
Gross Additions						0		0
Gross Reductions						80		50
Ending balance		2,130	[20]	2,520		2,130	[20]	2,520
Fair value		2,130	[20]	$ 2,520		2,130	[20]	$ 2,520		2,210	[19]
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Total Rate				15.00%				15.00%
PIK Rate				15.00%				15.00%
Amount of Realized Gain/(Loss)						0		$ 0
Amount of Unrealized Gain/(Loss)						(2,060)		0
Amount of Interest, Fees or Dividends Credited to Income						125		652
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						25,495	[19]	9,510
Gross Additions						0		652
Gross Reductions						2,060		6,449
Ending balance		23,435	[20]	$ 3,713		23,435	[20]	3,713
Fair value		$ 23,435	[20]	3,713		$ 23,435	[20]	3,713		$ 25,495	[19]
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Total Rate		15.00%	[20]			15.00%	[20]			15.00%	[19]
PIK Rate		15.00%	[20]			15.00%	[20]			15.00%	[19]
Amount of Realized Gain/(Loss)						$ 0		0
Amount of Unrealized Gain/(Loss)						0		6,020
Amount of Interest, Fees or Dividends Credited to Income						301		125
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						3,994	[19]	13,275
Gross Additions						301		6,020
Gross Reductions						0		0
Ending balance		$ 4,295	[20]	19,295		4,295	[20]	19,295
Fair value		$ 4,295	[20]	$ 19,295		$ 4,295	[20]	$ 19,295		$ 3,994	[19]
Investment, Identifier [Axis]: California Splendor Holdings LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15.25%	[12]	11.00%		15.25%	[12]	11.00%		13.75%	[16]
Spread		10.00%	[12]	10.00%		10.00%	[12]	10.00%		10.00%	[16]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(7)		56
Amount of Interest, Fees or Dividends Credited to Income						2,127		1,578
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						28,000	[16]	27,915
Gross Additions						7		85
Gross Reductions						7		0
Ending balance		$ 28,000	[12]	$ 28,000		28,000	[12]	28,000
Fair value		$ 28,000	[12]	28,000		$ 28,000	[12]	28,000		$ 28,000	[16]
Investment, Identifier [Axis]: Camin Cargo Control, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.72%	[8],[12],[18]			11.72%	[8],[12],[18]			10.88%	[7],[16]
Spread		6.50%	[8],[12],[18]			6.50%	[8],[12],[18]			6.50%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]					$ 14,685
Ending balance	[8],[12],[18]	$ 14,608				14,608
Fair value		14,608	[8],[12],[18]			14,608	[8],[12],[18]			$ 14,685	[7],[16]
Investment, Identifier [Axis]: Career Team Holdings, LLC, Class A Common Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								4,499
Gross Additions								1
Gross Reductions								0