RESERVE FOR LOSSES AND LOSS EXPENSES - Prior Year Development (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
| Prior years - net favorable (adverse) effect | $ 20,229 | $ 0 | $ 38,166 | $ 0 |
| Insurance | ||||
| Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
| Prior years - net favorable (adverse) effect | 15,216 | 0 | 29,194 | 0 |
| Reinsurance | ||||
| Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
| Prior years - net favorable (adverse) effect | $ 5,013 | $ 0 | $ 8,972 | $ 0 |