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FAIR VALUE MEASUREMENTS - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Level 3 Inputs (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at beginning of the period | $ 156,880 | $ 166,420 | $ 157,048 | $ 164,948
Included in net investment income |  |  |  |
Total foreign exchange gains (losses) | 1 | 13 | (3) | (6)
Purchases | 0 | 1,666 | 141 | 1,366
Settlements | (895) |  | (1,120) |
Balance at end of the period | $ 141,477 | $ 170,680 | $ 141,477 | $ 170,680
Included in net investment income |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Fair Value, Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Net Investment Income | Net Investment Income | Net Investment Income | Net Investment Income
Included in net investment income |  |  |  |
Included in earnings (loss) | $ 0 | $ 62 | $ 63 | $ 124
Included in net realized and unrealized gains (losses) on investments |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Fair Value, Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Net realized and unrealized gains (losses) on investments | Net realized and unrealized gains (losses) on investments | Net realized and unrealized gains (losses) on investments | Net realized and unrealized gains (losses) on investments
Included in net investment income |  |  |  |
Included in earnings (loss) | $ (14,687) | $ 3,548 | $ (14,687) | $ 4,257
Included in other income (loss) |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Fair Value, Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other income (loss) | Other income (loss) | Other income (loss) | Other income (loss)
Included in net investment income |  |  |  |
Included in earnings (loss) | $ 178 | $ (1,029) | $ 35 | $ (9)
Direct Private Equity Investments |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at beginning of the period | 59,964 | 67,532 | 59,905 | 66,780
Included in net investment income |  |  |  |
Total foreign exchange gains (losses) | 1 | 13 | (3) | (6)
Purchases | 0 | 0 | 0 | 0
Settlements | 0 |  | 0 |
Balance at end of the period | 45,278 | 71,155 | 45,278 | 71,155
Direct Private Equity Investments | Included in net investment income |  |  |  |
Included in net investment income |  |  |  |
Included in earnings (loss) | 0 | 62 | 63 | 124
Direct Private Equity Investments | Included in net realized and unrealized gains (losses) on investments |  |  |  |
Included in net investment income |  |  |  |
Included in earnings (loss) | (14,687) | 3,548 | (14,687) | 4,257
Direct Private Equity Investments | Included in other income (loss) |  |  |  |
Included in net investment income |  |  |  |
Included in earnings (loss) | 0 | 0 | 0 | 0
Term Loans |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at beginning of the period | 97,433 | 100,000 | 97,658 | 100,000
Included in net investment income |  |  |  |
Total foreign exchange gains (losses) | 0 | 0 | 0 | 0
Purchases | 0 | 0 | 0 | 0
Settlements | (794) |  | (1,019) |
Balance at end of the period | 96,639 | 100,000 | 96,639 | 100,000
Term Loans | Included in net investment income |  |  |  |
Included in net investment income |  |  |  |
Included in earnings (loss) | 0 | 0 | 0 | 0
Term Loans | Included in net realized and unrealized gains (losses) on investments |  |  |  |
Included in net investment income |  |  |  |
Included in earnings (loss) | 0 | 0 | 0 | 0
Term Loans | Included in other income (loss) |  |  |  |
Included in net investment income |  |  |  |
Included in earnings (loss) | 0 | 0 | 0 | 0
Other Assets and (Liabilities) |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at beginning of the period | (517) | (1,112) | (515) | (1,832)
Included in net investment income |  |  |  |
Total foreign exchange gains (losses) | 0 | 0 | 0 | 0
Purchases | 0 | 1,666 | 141 | 1,366
Settlements | (101) |  | (101) |
Balance at end of the period | (440) | (475) | (440) | (475)
Other Assets and (Liabilities) | Included in net investment income |  |  |  |
Included in net investment income |  |  |  |
Included in earnings (loss) | 0 | 0 | 0 | 0
Other Assets and (Liabilities) | Included in net realized and unrealized gains (losses) on investments |  |  |  |
Included in net investment income |  |  |  |
Included in earnings (loss) | 0 | 0 | 0 | 0
Other Assets and (Liabilities) | Included in other income (loss) |  |  |  |
Included in net investment income |  |  |  |
Included in earnings (loss) | $ 178 | $ (1,029) | $ 35 | $ (9)

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