INVESTMENTS - Schedule of Geographic Composition of Investment at Fair Value (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2024	Dec. 31, 2023
Schedule of Investments [Line Items]
Fair Value	$ 2,395,660	$ 2,488,715
Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	1,187,331	1,330,526
Jocassee Partners LLC \| Investment, Excluding Short Term Investment, with Previous Commitment to Provide Financing
Schedule of Investments [Line Items]
Fair Value	$ 1,168,585	$ 1,315,630
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	$ 19,825	$ 26,291
Australia \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	1.70%	2.00%
Austria \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 5,895	$ 6,026
Austria \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	0.50%	0.50%
Belgium \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 20,839	$ 20,379
Belgium \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	1.80%	1.50%
Canada \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 830	$ 3,998
Canada \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	0.10%	0.30%
Denmark \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 0	$ 1,082
Denmark \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	0.00%	0.10%
Finland \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 0	$ 2,207
Finland \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	0.00%	0.20%
France \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 133,666	$ 137,072
France \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	11.40%	10.40%
Germany \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 48,440	$ 50,672
Germany \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	4.20%	3.90%
Hong Kong \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 14,625	$ 14,162
Hong Kong \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	1.30%	1.10%
Ireland \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 7,228	$ 7,445
Ireland \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	0.60%	0.60%
Luxembourg \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 2,225	$ 1,839
Luxembourg \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	0.20%	0.10%
Netherlands \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 41,995	$ 41,260
Netherlands \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	3.60%	3.10%
Panama \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 1,425	$ 1,466
Panama \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	0.10%	0.10%
Singapore \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 5,000	$ 4,980
Singapore \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	0.40%	0.40%
Spain \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 2,147	$ 4,777
Spain \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	0.20%	0.40%
Sweden \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 3,675	$ 4,519
Sweden \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	0.30%	0.30%
Switzerland \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 583	$ 592
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	$ 114,697	$ 120,398
United Kingdom \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	9.80%	9.20%
USA \| Jocassee Partners LLC
Schedule of Investments [Line Items]
Fair Value	$ 745,490	$ 866,465
USA \| Jocassee Partners LLC \| Percentage of Total Portfolio, at Fair Value \| Geographic Concentration Risk
Schedule of Investments [Line Items]
Percentage of Total Portfolio	63.80%	65.80%