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Investments - Schedule of Net Realized and Unrealized Gains (Losses) on Investments (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Gain (Loss) on Securities [Line Items] |  |  |
Net realized and unrealized gains (losses) on fixed maturity investments trading | $ 292,054 | $ (1,369,323) | $ (309,788)
Net realized and unrealized gains (losses) on equity investments | 45,751 | (123,788) | 49,609
Net realized and unrealized gains (losses) on investments | 414,522 | (1,800,485) | (218,134)
Fixed maturity investments trading |  |  |
Gain (Loss) on Securities [Line Items] |  |  |
Net realized gains (losses) on fixed maturity investments trading | (393,041) | (732,561) | 79,588
Net unrealized gains (losses) on fixed maturity investments trading | 685,095 | (636,762) | (389,376)
Investments-related derivatives |  |  |
Gain (Loss) on Securities [Line Items] |  |  |
Net realized and unrealized gains (losses) on investments-related derivatives | (68,272) | (165,293) | (12,237)
Equity investments |  |  |
Gain (Loss) on Securities [Line Items] |  |  |
Net realized gains (losses) on equity investments | (27,492) | 43,035 | 335,491
Net unrealized gains (losses) on equity investments | 73,243 | (166,823) | (285,882)
Catastrophe bonds |  |  |
Gain (Loss) on Securities [Line Items] |  |  |
Net realized and unrealized gains (losses) on other investments | 101,897 | (130,335) | (35,033)
Other |  |  |
Gain (Loss) on Securities [Line Items] |  |  |
Net realized and unrealized gains (losses) on other investments | $ 43,092 | $ (11,746) | $ 89,315

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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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