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FAIR VALUE MEASUREMENTS - Summary of Changes in Level 3 for Financial Instruments Measured at Fair Value (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Opening balance | $ 228,342 | $ 260,278
Transfers into Level 3 | 20,832 | 0
Transfers out of Level 3 | (27,731) | (25,510)
Included in net income | 3,526 | (16,036)
Included in OCI | 2,051 | 2,438
Purchases | 47,982 | 59,250
Sales | (165) | (35,302)
Settlements/ distributions | (35,384) | (16,776)
Closing balance | $ 239,453 | $ 228,342
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Net investment income, Net investment gains (losses) | Net investment income, Net investment gains (losses)
FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfOtherComprehensiveIncomeExtensibleListNotDisclosedFlag | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Net investment income, Net investment gains (losses) | Net investment income, Net investment gains (losses)
Change in unrealized gain/(losses) | $ 4,024 | $ (15,591)
Fixed maturities |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Opening balance | 135,753 | 119,104
Transfers into Level 3 | 20,832 | 0
Transfers out of Level 3 | (20,832) | 0
Included in net income | (1,347) | (8,527)
Included in OCI | 2,051 | 2,438
Purchases | 35,744 | 38,173
Sales | (165) | (770)
Settlements/ distributions | (24,813) | (14,665)
Closing balance | 147,223 | 135,753
Change in unrealized gain/(losses) | 0 | 0
Other investments |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Opening balance | 92,589 | 141,174
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | (6,899) | (25,510)
Included in net income | 4,873 | (7,509)
Included in OCI | 0 | 0
Purchases | 12,238 | 21,077
Sales | 0 | (34,532)
Settlements/ distributions | (10,571) | (2,111)
Closing balance | 92,230 | 92,589
Change in unrealized gain/(losses) | 4,024 | (15,591)
Corporate debt | Fixed maturities |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Opening balance | 135,753 | 119,104
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | (20,832) | 0
Included in net income | (1,347) | (8,527)
Included in OCI | 2,051 | 2,438
Purchases | 35,744 | 38,173
Sales | (165) | (770)
Settlements/ distributions | (24,813) | (14,665)
Closing balance | 126,391 | 135,753
Change in unrealized gain/(losses) | 0 | 0
ABS | Fixed maturities |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Opening balance | 0 | 0
Transfers into Level 3 | 20,832 | 0
Transfers out of Level 3 | 0 | 0
Included in net income | 0 | 0
Included in OCI | 0 | 0
Purchases | 0 | 0
Sales | 0 | 0
Settlements/ distributions | 0 | 0
Closing balance | 20,832 | 0
Change in unrealized gain/(losses) | 0 | 0
CLO-Equities | Other investments |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Opening balance | 5,300 | 5,016
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | 0 | 0
Included in net income | 849 | 2,395
Included in OCI | 0 | 0
Purchases | 0 | 0
Sales | 0 | 0
Settlements/ distributions | (6,149) | (2,111)
Closing balance | 0 | 5,300
Change in unrealized gain/(losses) | 0 | 2,395
Other privately held investments | Other investments |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Opening balance | 87,289 | 136,158
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | (6,899) | (25,510)
Included in net income | 4,024 | (9,904)
Included in OCI | 0 | 0
Purchases | 12,238 | 21,077
Sales | 0 | (34,532)
Settlements/ distributions | (4,422) | 0
Closing balance | 92,230 | 87,289
Change in unrealized gain/(losses) | $ 4,024 | $ (17,986)

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