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INVESTMENTS - Schedule of Other Investments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Schedule of Investments [Line Items] |  |  |
Other investments | $ 4,324,761 | $ 3,515,566 |
Initial commitments | 4,500,000 | 3,600,000 |
Fulfilled commitments | 2,500,000 | 2,000,000 |
Unfunded commitments | $ 2,000,000 | 1,600,000 |
Maturity period | 5 years |  |
Other Investments |  |  |
Schedule of Investments [Line Items] |  |  |
Net unrealized gain (loss) recognized in earnings due to change in estimate | $ (9,700) | (3,000) | $ 19,800
Fund investments |  |  |
Schedule of Investments [Line Items] |  |  |
Other investments | 2,128,499 | 1,415,804 |
Catastrophe bonds |  |  |
Schedule of Investments [Line Items] |  |  |
Other investments | $ 1,984,396 | 1,942,199 |
Catastrophe bonds | Minimum |  |  |
Schedule of Investments [Line Items] |  |  |
Maturity period | 1 year |  |
Catastrophe bonds | Maximum |  |  |
Schedule of Investments [Line Items] |  |  |
Maturity period | 5 years |  |
Direct private equity investments |  |  |
Schedule of Investments [Line Items] |  |  |
Other investments | $ 211,866 | 59,905 |
Term loans |  |  |
Schedule of Investments [Line Items] |  |  |
Other investments | $ 0 | $ 97,658 |

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