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Investments - Industry Composition (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023		Dec. 31, 2022
Schedule of Investments [Line Items]
Fair Value	$ 2,488,715	[1]	$ 2,448,935
Percent of Total Net Assets	208.00%	[1]	205.40%
Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 1,315,630		$ 1,209,063
Sierra JV
Schedule of Investments [Line Items]
Fair Value	$ 79,599		$ 110,047
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	100.00%		100.00%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	100.00%		100.00%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Sierra JV
Schedule of Investments [Line Items]
Percent of Total Portfolio	100.00%		100.00%
Aerospace and Defense
Schedule of Investments [Line Items]
Fair Value	$ 132,498		$ 120,945
Percent of Total Net Assets	11.10%		10.10%
Aerospace and Defense | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 82,200		$ 69,133
Aerospace and Defense | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	5.30%		4.90%
Aerospace and Defense | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	6.30%		5.70%
Automotive
Schedule of Investments [Line Items]
Fair Value	$ 80,828		$ 76,934
Percent of Total Net Assets	6.70%		6.50%
Automotive | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 26,087		$ 20,625
Automotive | Sierra JV
Schedule of Investments [Line Items]
Fair Value	$ 2,463		$ 2,283
Automotive | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	3.30%		3.20%
Automotive | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	2.00%		1.70%
Automotive | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Sierra JV
Schedule of Investments [Line Items]
Percent of Total Portfolio	3.10%		2.10%
Banking, Finance, Insurance and Real Estate
Schedule of Investments [Line Items]
Fair Value	$ 401,816		$ 312,936
Percent of Total Net Assets	33.60%		26.20%
Banking, Finance, Insurance and Real Estate | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 121,798		$ 105,047
Banking, Finance, Insurance and Real Estate | Sierra JV
Schedule of Investments [Line Items]
Fair Value	$ 254		$ 1,414
Banking, Finance, Insurance and Real Estate | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	16.10%		12.80%
Banking, Finance, Insurance and Real Estate | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	9.30%		8.70%
Banking, Finance, Insurance and Real Estate | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Sierra JV
Schedule of Investments [Line Items]
Percent of Total Portfolio	0.30%		1.30%
Beverage, Food and Tobacco
Schedule of Investments [Line Items]
Fair Value	$ 23,135		$ 34,690
Percent of Total Net Assets	1.90%		2.90%
Beverage, Food and Tobacco | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 30,637		$ 25,885
Beverage, Food and Tobacco | Sierra JV
Schedule of Investments [Line Items]
Fair Value	$ 3,172		$ 3,181
Beverage, Food and Tobacco | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	0.90%		1.40%
Beverage, Food and Tobacco | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	2.30%		2.10%
Beverage, Food and Tobacco | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Sierra JV
Schedule of Investments [Line Items]
Percent of Total Portfolio	4.00%		2.90%
Capital Equipment
Schedule of Investments [Line Items]
Fair Value	$ 128,706		$ 141,479
Percent of Total Net Assets	10.80%		11.90%
Capital Equipment | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 17,986		$ 25,014
Capital Equipment | Sierra JV
Schedule of Investments [Line Items]
Fair Value	$ 5,271		$ 9,208
Capital Equipment | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	5.20%		5.80%
Capital Equipment | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	1.40%		2.10%
Capital Equipment | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Sierra JV
Schedule of Investments [Line Items]
Percent of Total Portfolio	6.60%		8.40%
Chemicals, Plastics, and Rubber
Schedule of Investments [Line Items]
Fair Value	$ 35,897		$ 47,076
Percent of Total Net Assets	3.00%		3.90%
Chemicals, Plastics, and Rubber | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 37,030		$ 33,111
Chemicals, Plastics, and Rubber | Sierra JV
Schedule of Investments [Line Items]
Fair Value	$ 2,942		$ 2,772
Chemicals, Plastics, and Rubber | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	1.50%		1.90%
Chemicals, Plastics, and Rubber | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	2.80%		2.70%
Chemicals, Plastics, and Rubber | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Sierra JV
Schedule of Investments [Line Items]
Percent of Total Portfolio	3.70%		2.50%
Construction and Building
Schedule of Investments [Line Items]
Fair Value	$ 30,387		$ 45,049
Percent of Total Net Assets	2.50%		3.80%
Construction and Building | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 16,942		$ 17,616
Construction and Building | Sierra JV
Schedule of Investments [Line Items]
Fair Value	$ 1,867		$ 1,887
Construction and Building | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	1.20%		1.80%
Construction and Building | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	1.30%		1.50%
Construction and Building | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Sierra JV
Schedule of Investments [Line Items]
Percent of Total Portfolio	2.40%		1.70%
Consumer goods: Durable
Schedule of Investments [Line Items]
Fair Value	$ 47,074		$ 43,932
Percent of Total Net Assets	3.90%		3.70%
Consumer goods: Durable | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 26,412		$ 18,751
Consumer goods: Durable | Sierra JV
Schedule of Investments [Line Items]
Fair Value	$ 1,042		$ 1,272
Consumer goods: Durable | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	1.90%		1.80%
Consumer goods: Durable | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	2.00%		1.70%
Consumer goods: Durable | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Sierra JV
Schedule of Investments [Line Items]
Percent of Total Portfolio	1.30%		1.10%
Consumer goods: Non-durable
Schedule of Investments [Line Items]
Fair Value	$ 28,210		$ 27,693
Percent of Total Net Assets	2.40%		2.30%
Consumer goods: Non-durable | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 21,850		$ 22,861
Consumer goods: Non-durable | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	1.10%		1.10%
Consumer goods: Non-durable | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	1.70%		1.90%
Containers, Packaging and Glass
Schedule of Investments [Line Items]
Fair Value	$ 37,524		$ 37,877
Percent of Total Net Assets	3.10%		3.20%
Containers, Packaging and Glass | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 26,829		$ 24,445
Containers, Packaging and Glass | Sierra JV
Schedule of Investments [Line Items]
Fair Value	$ 0		$ 1,812
Containers, Packaging and Glass | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	1.50%		1.50%
Containers, Packaging and Glass | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	2.00%		2.00%
Containers, Packaging and Glass | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Sierra JV
Schedule of Investments [Line Items]
Percent of Total Portfolio	0.00%		1.60%
Energy: Electricity
Schedule of Investments [Line Items]
Fair Value	$ 20,874		$ 7,337
Percent of Total Net Assets	1.70%		0.60%
Energy: Electricity | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 20,250		$ 15,375
Energy: Electricity | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	0.80%		0.30%
Energy: Electricity | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	1.50%		1.30%
Energy: Oil and Gas
Schedule of Investments [Line Items]
Fair Value	$ 3,240		$ 4,776
Percent of Total Net Assets	0.30%		0.40%
Energy: Oil and Gas | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 6,724		$ 5,726
Energy: Oil and Gas | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	0.10%		0.20%
Energy: Oil and Gas | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	0.50%		0.50%
Environmental Industries
Schedule of Investments [Line Items]
Fair Value	$ 53,484		$ 51,006
Percent of Total Net Assets	4.50%		4.30%
Environmental Industries | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 6,986		$ 7,314
Environmental Industries | Sierra JV
Schedule of Investments [Line Items]
Fair Value	$ 3,487		$ 7,797
Environmental Industries | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	2.10%		2.10%
Environmental Industries | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	0.50%		0.60%
Environmental Industries | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Sierra JV
Schedule of Investments [Line Items]
Percent of Total Portfolio	4.40%		7.10%
Forest Products & Paper | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 3,605		$ 2,269
Forest Products & Paper | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	0.30%		0.20%
Healthcare and Pharmaceuticals
Schedule of Investments [Line Items]
Fair Value	$ 216,952		$ 203,576
Percent of Total Net Assets	18.10%		17.10%
Healthcare and Pharmaceuticals | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 141,070		$ 128,983
Healthcare and Pharmaceuticals | Sierra JV
Schedule of Investments [Line Items]
Fair Value	$ 12,880		$ 13,614
Healthcare and Pharmaceuticals | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	8.70%		8.30%
Healthcare and Pharmaceuticals | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	10.70%		10.70%
Healthcare and Pharmaceuticals | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Sierra JV
Schedule of Investments [Line Items]
Percent of Total Portfolio	16.20%		12.40%
High Tech Industries
Schedule of Investments [Line Items]
Fair Value	$ 303,082		$ 300,980
Percent of Total Net Assets	25.40%		25.20%
High Tech Industries | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 174,572		$ 141,906
High Tech Industries | Sierra JV
Schedule of Investments [Line Items]
Fair Value	$ 14,661		$ 13,713
High Tech Industries | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	12.20%		12.30%
High Tech Industries | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	13.30%		11.70%
High Tech Industries | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Sierra JV
Schedule of Investments [Line Items]
Percent of Total Portfolio	18.40%		12.50%
Hotel, Gaming and Leisure
Schedule of Investments [Line Items]
Fair Value	$ 54,256		$ 54,023
Percent of Total Net Assets	4.50%		4.50%
Hotel, Gaming and Leisure | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 22,834		$ 23,587
Hotel, Gaming and Leisure | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	2.20%		2.20%
Hotel, Gaming and Leisure | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	1.70%		2.00%
Investment Funds and Vehicles
Schedule of Investments [Line Items]
Fair Value	$ 110,066		$ 130,427
Percent of Total Net Assets	9.20%		10.90%
Investment Funds and Vehicles | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 33,450		$ 61,028
Investment Funds and Vehicles | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	4.40%		5.30%
Investment Funds and Vehicles | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	2.50%		5.00%
Media: Advertising, Printing and Publishing
Schedule of Investments [Line Items]
Fair Value	$ 39,447		$ 55,477
Percent of Total Net Assets	3.30%		4.70%
Media: Advertising, Printing and Publishing | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 12,081		$ 5,969
Media: Advertising, Printing and Publishing | Sierra JV
Schedule of Investments [Line Items]
Fair Value	$ 0		$ 10,032
Media: Advertising, Printing and Publishing | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	1.60%		2.30%
Media: Advertising, Printing and Publishing | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	0.90%		0.50%
Media: Advertising, Printing and Publishing | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Sierra JV
Schedule of Investments [Line Items]
Percent of Total Portfolio	0.00%		9.10%
Media: Broadcasting and Subscription
Schedule of Investments [Line Items]
Fair Value	$ 13,277		$ 20,257
Percent of Total Net Assets	1.10%		1.70%
Media: Broadcasting and Subscription | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 31,201		$ 34,676
Media: Broadcasting and Subscription | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	0.50%		0.80%
Media: Broadcasting and Subscription | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	2.40%		2.90%
Media: Diversified and Production
Schedule of Investments [Line Items]
Fair Value	$ 64,559		$ 60,561
Percent of Total Net Assets	5.40%		5.10%
Media: Diversified and Production | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 34,391		$ 28,897
Media: Diversified and Production | Sierra JV
Schedule of Investments [Line Items]
Fair Value	$ 0		$ 5,498
Media: Diversified and Production | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	2.60%		2.50%
Media: Diversified and Production | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	2.60%		2.40%
Media: Diversified and Production | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Sierra JV
Schedule of Investments [Line Items]
Percent of Total Portfolio	0.00%		5.00%
Metals and Mining
Schedule of Investments [Line Items]
Fair Value	$ 8,993		$ 33,125
Percent of Total Net Assets	0.80%		2.80%
Metals and Mining | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 3,863		$ 5,069
Metals and Mining | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	0.40%		1.40%
Metals and Mining | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	0.30%		0.40%
Retail | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 13,141		$ 15,720
Retail | Sierra JV
Schedule of Investments [Line Items]
Fair Value	$ 6,255		$ 5,489
Retail | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	1.00%		1.30%
Retail | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Sierra JV
Schedule of Investments [Line Items]
Percent of Total Portfolio	7.90%		5.00%
Services: Business
Schedule of Investments [Line Items]
Fair Value	$ 326,762		$ 338,417
Percent of Total Net Assets	27.30%		28.40%
Services: Business | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 222,610		$ 199,805
Services: Business | Sierra JV
Schedule of Investments [Line Items]
Fair Value	$ 6,798		$ 10,876
Services: Business | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	13.20%		13.80%
Services: Business | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	16.90%		16.50%
Services: Business | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Sierra JV
Schedule of Investments [Line Items]
Percent of Total Portfolio	8.50%		9.90%
Services: Consumer
Schedule of Investments [Line Items]
Fair Value	$ 61,409		$ 67,070
Percent of Total Net Assets	5.10%		5.60%
Services: Consumer | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 58,632		$ 52,543
Services: Consumer | Sierra JV
Schedule of Investments [Line Items]
Fair Value	$ 8,525		$ 8,265
Services: Consumer | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	2.50%		2.70%
Services: Consumer | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	4.50%		4.30%
Services: Consumer | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Sierra JV
Schedule of Investments [Line Items]
Percent of Total Portfolio	10.70%		7.50%
Structured Products
Schedule of Investments [Line Items]
Fair Value	$ 102,922		$ 86,703
Percent of Total Net Assets	8.60%		7.30%
Structured Products | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	4.10%		3.50%
Telecommunications
Schedule of Investments [Line Items]
Fair Value	$ 27,565		$ 24,058
Percent of Total Net Assets	2.30%		2.00%
Telecommunications | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 36,027		$ 38,034
Telecommunications | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	1.10%		1.00%
Telecommunications | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	2.70%		3.10%
Transportation: Cargo
Schedule of Investments [Line Items]
Fair Value	$ 96,450		$ 89,398
Percent of Total Net Assets	8.10%		7.50%
Transportation: Cargo | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 57,575		$ 56,018
Transportation: Cargo | Sierra JV
Schedule of Investments [Line Items]
Fair Value	$ 6,296		$ 6,221
Transportation: Cargo | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	3.90%		3.70%
Transportation: Cargo | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	4.40%		4.60%
Transportation: Cargo | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Sierra JV
Schedule of Investments [Line Items]
Percent of Total Portfolio	7.90%		5.60%
Transportation: Consumer
Schedule of Investments [Line Items]
Fair Value	$ 11,951		$ 11,062
Percent of Total Net Assets	1.00%		0.90%
Transportation: Consumer | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 12,613		$ 12,562
Transportation: Consumer | Sierra JV
Schedule of Investments [Line Items]
Fair Value	$ 3,686		$ 4,713
Transportation: Consumer | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	0.50%		0.50%
Transportation: Consumer | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	1.00%		1.00%
Transportation: Consumer | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Sierra JV
Schedule of Investments [Line Items]
Percent of Total Portfolio	4.60%		4.30%
Utilities: Electric
Schedule of Investments [Line Items]
Fair Value	$ 22,696		$ 17,374
Percent of Total Net Assets	1.90%		1.50%
Utilities: Electric | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 9,396		$ 4,194
Utilities: Electric | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	0.90%		0.70%
Utilities: Electric | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	0.70%		0.30%
Utilities: Oil and Gas
Schedule of Investments [Line Items]
Fair Value	$ 4,655		$ 4,697
Percent of Total Net Assets	0.40%		0.40%
Utilities: Oil and Gas | Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 6,838		$ 6,900
Utilities: Oil and Gas | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member
Schedule of Investments [Line Items]
Percent of Total Portfolio	0.20%		0.20%
Utilities: Oil and Gas | Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Jocassee Partners LLC
Schedule of Investments [Line Items]
Percent of Total Portfolio	0.50%		0.60%
[1] Fair value as a percentage of net assets.

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-42

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
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