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INVESTMENTS - Schedule of Geographic Composition of Investment at Fair Value (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Schedule of Investments [Line Items] |  |
Fair Value | $ 2,527,537 | $ 2,488,715
Jocassee Partners LLC |  |
Schedule of Investments [Line Items] |  |
Fair Value | $ 1,240,745 | $ 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 | $ 25,432 | $ 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 | 2.00% | 2.00%
Austria | Jocassee Partners LLC |  |
Schedule of Investments [Line Items] |  |
Fair Value | $ 5,940 | $ 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 | $ 20,564 | $ 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 | 1.70% | 1.50%
Canada | Jocassee Partners LLC |  |
Schedule of Investments [Line Items] |  |
Fair Value | $ 1,895 | $ 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 | 0.20% | 0.30%
Denmark | Jocassee Partners LLC |  |
Schedule of Investments [Line Items] |  |
Fair Value | $ 538 | $ 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 | $ 133,970 | $ 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 | 10.80% | 10.40%
Germany | Jocassee Partners LLC |  |
Schedule of Investments [Line Items] |  |
Fair Value | $ 49,125 | $ 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 | 4.00% | 3.90%
Hong Kong | Jocassee Partners LLC |  |
Schedule of Investments [Line Items] |  |
Fair Value | $ 14,570 | $ 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 | 1.20% | 1.10%
Ireland | Jocassee Partners LLC |  |
Schedule of Investments [Line Items] |  |
Fair Value | $ 7,248 | $ 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 | $ 1,803 | $ 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 | 0.10% | 0.10%
Netherlands | Jocassee Partners LLC |  |
Schedule of Investments [Line Items] |  |
Fair Value | $ 41,631 | $ 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 | 3.40% | 3.10%
Panama | Jocassee Partners LLC |  |
Schedule of Investments [Line Items] |  |
Fair Value | $ 1,456 | $ 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 | $ 4,990 | $ 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 | $ 4,681 | $ 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 | 0.40% | 0.40%
Sweden | Jocassee Partners LLC |  |
Schedule of Investments [Line Items] |  |
Fair Value | $ 3,950 | $ 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 | $ 585 | $ 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 | $ 120,445 | $ 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 | 9.70% | 9.20%
USA | Jocassee Partners LLC |  |
Schedule of Investments [Line Items] |  |
Fair Value | $ 801,922 | $ 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 | 64.60% | 65.80%

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