INVESTMENTS - Schedule of Geographic Composition of Investment at Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2025	Dec. 31, 2024
Schedule of Investments [Line Items]
Fair Value	$ 2,571,228	$ 2,449,272
Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	1,081,889	1,095,308
Jocassee Partners LLC \| Investment, Excluding Short Term Investment, with Previous Commitment to Provide Financing
Schedule of Investments [Line Items]
Fair Value	$ 1,066,250	$ 1,085,025
Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	100.00%	100.00%
Australia \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 22,858	$ 23,187
Australia \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	2.00%	2.00%
Austria \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 5,941	$ 5,695
Austria \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	1.00%	1.00%
Belgium \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 21,637	$ 20,741
Belgium \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	2.00%	2.00%
Canada \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 496	$ 590
Canada \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	0.00%	0.00%
France \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 113,624	$ 124,810
France \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	11.00%	12.00%
Germany \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 36,570	$ 35,691
Germany \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	3.00%	3.00%
Hong Kong \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 14,940	$ 14,843
Hong Kong \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	1.00%	1.00%
Ireland \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 7,619	$ 7,302
Ireland \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	1.00%	1.00%
Luxembourg \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 2,195	$ 2,128
Luxembourg \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	0.00%	0.00%
Netherlands \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 41,528	$ 39,504
Netherlands \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	4.00%	4.00%
Panama \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 0	$ 1,470
Panama \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	0.00%	0.00%
Singapore \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 5,000	$ 5,000
Singapore \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	1.00%	1.00%
Spain \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 0	$ 2,078
Spain \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	0.00%	0.00%
Sweden \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 0	$ 3,523
Sweden \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	0.00%	0.00%
Switzerland \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 588	$ 595
Switzerland \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	0.00%	0.00%
United Kingdom \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 111,432	$ 111,097
United Kingdom \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	10.00%	10.00%
USA \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 681,822	$ 686,771
USA \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	64.00%	63.00%