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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, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at beginning of the period | $ 38,753 | $ 156,880 | $ 43,372 | $ 157,048
Included in net investment income |  |  |  |
Net foreign exchange gains (losses) | 29 | 1 | 43 | (3)
Purchases | 41,459 |  | 41,459 | 141
Settlements | (565) | (895) | (761) | (1,120)
Balance at end of the period | $ 76,094 | $ 141,477 | $ 76,094 | $ 141,477
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
Included in net investment income |  |  |  |
Included in earnings (loss) | $ 70 |  | $ 139 | $ 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 | 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) | $ (3,778) | $ (14,687) | $ (8,651) | $ (14,687)
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) | $ 126 | $ 178 | $ 493 | $ 35
Asset-backed |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at beginning of the period | 0 |  | 0 |
Included in net investment income |  |  |  |
Net foreign exchange gains (losses) | 0 |  | 0 |
Purchases | 41,459 |  | 41,459 |
Settlements | (523) |  | (523) |
Balance at end of the period | 40,936 |  | 40,936 |
Asset-backed | Net investment income |  |  |  |
Included in net investment income |  |  |  |
Included in earnings (loss) | 0 |  | 0 |
Asset-backed | Net realized and unrealized gains (losses) on investments |  |  |  |
Included in net investment income |  |  |  |
Included in earnings (loss) | 0 |  | 0 |
Asset-backed | Other income (loss) |  |  |  |
Included in net investment income |  |  |  |
Included in earnings (loss) | 0 |  | 0 |
Direct Private Equity Investments |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at beginning of the period | 38,987 | 59,964 | 43,777 | 59,905
Included in net investment income |  |  |  |
Net foreign exchange gains (losses) | 29 | 1 | 43 | (3)
Purchases | 0 |  | 0 | 0
Settlements | 0 | 0 | 0 | 0
Balance at end of the period | 35,308 | 45,278 | 35,308 | 45,278
Direct Private Equity Investments | Net investment income |  |  |  |
Included in net investment income |  |  |  |
Included in earnings (loss) | 70 |  | 139 | 63
Direct Private Equity Investments | Net realized and unrealized gains (losses) on investments |  |  |  |
Included in net investment income |  |  |  |
Included in earnings (loss) | (3,778) | (14,687) | (8,651) | (14,687)
Direct Private Equity Investments | 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 |  | 97,658
Included in net investment income |  |  |  |
Net foreign exchange gains (losses) |  | 0 |  | 0
Purchases |  |  |  | 0
Settlements |  | (794) |  | (1,019)
Balance at end of the period |  | 96,639 |  | 96,639
Term Loans | Net investment income |  |  |  |
Included in net investment income |  |  |  |
Included in earnings (loss) |  |  |  | 0
Term Loans | Net realized and unrealized gains (losses) on investments |  |  |  |
Included in net investment income |  |  |  |
Included in earnings (loss) |  | 0 |  | 0
Term Loans | Other income (loss) |  |  |  |
Included in net investment income |  |  |  |
Included in earnings (loss) |  | 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 | (234) | (517) | (405) | (515)
Included in net investment income |  |  |  |
Net foreign exchange gains (losses) | 0 | 0 | 0 | 0
Purchases | 0 |  | 0 | 141
Settlements | (42) | (101) | (238) | (101)
Balance at end of the period | (150) | (440) | (150) | (440)
Other Assets and (Liabilities) | Net investment income |  |  |  |
Included in net investment income |  |  |  |
Included in earnings (loss) | 0 |  | 0 | 0
Other Assets and (Liabilities) | 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) | Other income (loss) |  |  |  |
Included in net investment income |  |  |  |
Included in earnings (loss) | $ 126 | $ 178 | $ 493 | $ 35

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