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INVESTMENTS - Geographic Composition Of Investment At Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Summary of Investment Holdings [Line Items]
Fair Value	$ 2,556,114	$ 2,448,935
Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 1,212,132	$ 1,209,063
Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	100.00%	100.00%
Australia | Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 25,771	$ 26,111
Australia | Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	2.10%	2.10%
Austria | Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 6,924	$ 6,697
Austria | Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	0.60%	0.50%
Belgium | Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 17,075	$ 16,385
Belgium | Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	1.40%	1.40%
Canada | Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 7,309	$ 7,280
Canada | Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	0.60%	0.60%
Denmark | Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 986	$ 953
Denmark | Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	0.10%	0.10%
Finland | Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 2,112	$ 1,967
Finland | Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	0.20%	0.20%
France | Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 135,678	$ 133,682
France | Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	11.20%	11.10%
Germany | Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 39,323	$ 38,068
Germany | Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	3.20%	3.10%
Hong Kong | Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 16,635	$ 16,593
Hong Kong | Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	1.40%	1.40%
Ireland | Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 4,336	$ 4,334
Ireland | Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	0.30%	0.40%
Luxembourg | Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 1,795	$ 1,759
Luxembourg | Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	0.10%	0.10%
Netherlands | Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 35,965	$ 35,194
Netherlands | Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	3.00%	2.90%
Panama | Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 946	$ 945
Panama | Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	0.10%	0.10%
Singapore | Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 4,961	$ 4,955
Singapore | Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	0.40%	0.40%
Spain | Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 4,452	$ 4,189
Spain | Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	0.40%	0.30%
Sweden | Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 4,392	$ 4,371
Sweden | Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	0.40%	0.40%
Switzerland | Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 2,404	$ 5,558
Switzerland | Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	0.20%	0.50%
United Kingdom | Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 128,084	$ 126,305
United Kingdom | Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	10.50%	10.40%
USA | Jocassee Partners LLC
Summary of Investment Holdings [Line Items]
Fair Value	$ 772,984	$ 773,717
USA | Jocassee Partners LLC | Fair Value | Geographic Concentration Risk
Summary of Investment Holdings [Line Items]
Percentage of Total Portfolio	63.80%	64.00%

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