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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
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance at beginning of the period | $ 43,372 | $ 157,048
Included in net investment income |  |
Net foreign exchange gains (losses) | 14 | (4)
Purchases |  | 141
Settlements | (196) | (225)
Balance at end of the period | $ 38,753 | $ 156,880
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
Included in net investment income |  |
Included in earnings (loss) | $ 69 | $ 63
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 |
Included in net investment income |  |
Included in earnings (loss) | $ (4,873) |
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)
Included in net investment income |  |
Included in earnings (loss) | $ 367 | $ (143)
Direct Private Equity Investments |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance at beginning of the period | 43,777 | 59,905
Included in net investment income |  |
Net foreign exchange gains (losses) | 14 | (4)
Purchases |  | 0
Settlements | 0 | 0
Balance at end of the period | 38,987 | 59,964
Direct Private Equity Investments | Net investment income |  |
Included in net investment income |  |
Included in earnings (loss) | 69 | 63
Direct Private Equity Investments | Net realized and unrealized gains (losses) on investments |  |
Included in net investment income |  |
Included in earnings (loss) | (4,873) |
Direct Private Equity Investments | Other income (loss) |  |
Included in net investment income |  |
Included in earnings (loss) | 0 | 0
Term Loans |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance at beginning of the period |  | 97,658
Included in net investment income |  |
Net foreign exchange gains (losses) |  | 0
Purchases |  | 0
Settlements |  | (225)
Balance at end of the period |  | 97,433
Term Loans | Net investment income |  |
Included in net investment income |  |
Included in earnings (loss) |  | 0
Term Loans | Other income (loss) |  |
Included in net investment income |  |
Included in earnings (loss) |  | 0
Other Assets and (Liabilities) |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance at beginning of the period | (405) | (515)
Included in net investment income |  |
Net foreign exchange gains (losses) | 0 | 0
Purchases |  | 141
Settlements | (196) | 0
Balance at end of the period | (234) | (517)
Other Assets and (Liabilities) | Net investment income |  |
Included in net investment income |  |
Included in earnings (loss) | 0 | 0
Other Assets and (Liabilities) | Net realized and unrealized gains (losses) on investments |  |
Included in net investment income |  |
Included in earnings (loss) | 0 |
Other Assets and (Liabilities) | Other income (loss) |  |
Included in net investment income |  |
Included in earnings (loss) | $ 367 | $ (143)

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