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INVESTMENTS - Geographic Composition Of Investment At Fair Value (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2022 | Dec. 31, 2021
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 2,332,492 | [1] | $ 1,800,594 | [2]
Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 1,213,233 |  | $ 1,245,647 |
Jocassee Partners LLC | Percentage of Total Portfolio | 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 of investment owned | $ 24,788 |  | $ 16,509 |
Australia | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 2.00% |  | 1.30% |
Austria | Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 6,141 |  | $ 1,115 |
Austria | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 0.50% |  | 0.10% |
Belgium | Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 15,670 |  | $ 14,814 |
Belgium | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 1.30% |  | 1.20% |
Canada | Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 7,273 |  | $ 8,507 |
Canada | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 0.60% |  | 0.70% |
Denmark | Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 889 |  | $ 6,960 |
Denmark | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 0.10% |  | 0.60% |
Finland | Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 1,733 |  | $ 47,992 |
Finland | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 0.10% |  | 3.90% |
France | Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 124,836 |  | $ 3,391 |
France | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 10.30% |  | 0.30% |
Germany | Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 51,063 |  | $ 6,357 |
Germany | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 4.20% |  | 0.50% |
Hong Kong | Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 16,262 |  | $ 2,272 |
Hong Kong | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 1.40% |  | 0.20% |
Ireland | Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 3,632 |  | $ 123,816 |
Ireland | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 0.30% |  | 9.90% |
Italy | Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 0 |  | $ 113,896 |
Italy | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 0.00% |  | 9.10% |
Luxembourg | Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 1,608 |  | $ 4,766 |
Luxembourg | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 0.10% |  | 0.40% |
Netherlands | Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 32,866 |  | $ 3,744 |
Netherlands | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 2.70% |  | 0.30% |
Panama | Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 939 |  | $ 0 |
Panama | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 0.10% |  | 0.00% |
Singapore | Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 4,905 |  | $ 0 |
Singapore | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 0.40% |  | 0.00% |
Spain | Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 3,806 |  | $ 1,225 |
Spain | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 0.30% |  | 0.10% |
Sweden | Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 4,104 |  | $ 32,150 |
Sweden | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 0.40% |  | 2.60% |
Switzerland | Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 5,176 |  | $ 965 |
Switzerland | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 0.40% |  | 0.10% |
United Kingdom | Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 116,853 |  | $ 5,305 |
United Kingdom | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 9.60% |  | 0.40% |
USA | Jocassee Partners LLC |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Fair value of investment owned | $ 790,689 |  | $ 851,863 |
USA | Jocassee Partners LLC | Percentage of Total Portfolio | Geographic Concentration Risk |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Percentage of Total Portfolio | 65.20% |  | 68.40% |
[1] | Some or all of the investment is or will be encumbered as security for the Company's $1.1 billion senior secured credit facility with ING Capital LLC initially entered into in February 2019 (as amended, restated and otherwise modified from time to time, the "February 2019 Credit Facility").
[2] | Some or all of the investment is or will be encumbered as security for the Company's senior secured credit facility with ING Capital LLC.

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