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INVESTMENTS - Schedule of Net Realized and Unrealized Gains (Losses) on Investments (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023
Gain (Loss) on Securities [Line Items] |  |
Net realized and unrealized gains (losses) on investments | $ (213,654) | $ 279,451
Fixed maturity investments trading |  |
Gain (Loss) on Securities [Line Items] |  |
Net realized gains (losses) on fixed maturity investments trading | 9,796 | (104,765)
Net unrealized gains (losses) on fixed maturity investments trading | (211,996) | 312,026
Net realized and unrealized gains (losses) on fixed maturity investments trading | (202,200) | 207,261
Derivatives |  |
Gain (Loss) on Securities [Line Items] |  |
Net realized and unrealized gains (losses) on investment-related derivatives | (57,806) | 12,162
Equity investments |  |
Gain (Loss) on Securities [Line Items] |  |
Net realized gains (losses) on equity investments | 0 | (8,738)
Net unrealized gains (losses) on equity investments | 13,097 | 39,151
Net realized and unrealized gains (losses) on equity investments | 13,097 | 30,413
Catastrophe bonds |  |
Gain (Loss) on Securities [Line Items] |  |
Net realized and unrealized gains (losses) on other investments | 18,907 | 24,126
Other |  |
Gain (Loss) on Securities [Line Items] |  |
Net realized and unrealized gains (losses) on other investments | $ 14,348 | $ 5,489

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- Definition Amount of unrealized and realized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity), investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and investment in debt security measured at fair value with change in fair value recognized in net income (trading). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(7)(c)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(9)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(d)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1 + Details
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