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INVESTMENTS - Schedule of Components of Net Investment Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |  |
Investment income before investment expenses | $ 419,704 | $ 417,373 | $ 831,953 | $ 812,909
Investment expenses | (6,596) | (6,528) | (13,492) | (11,289)
Net investment income | 413,108 | 410,845 | 818,461 | 801,620
Fixed maturity investments trading |  |  |  |
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |  |
Investment income before investment expenses | 282,173 | 273,900 | 566,896 | 531,189
Short term investments |  |  |  |
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |  |
Investment income before investment expenses | 48,415 | 48,386 | 89,444 | 95,177
Fixed income exchange traded funds |  |  |  |
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |  |
Investment income before investment expenses | 6,528 | 0 | 7,712 | 0
Other equity investments |  |  |  |
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |  |
Investment income before investment expenses | 615 | 589 | 1,341 | 1,149
Catastrophe bonds |  |  |  |
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |  |
Investment income before investment expenses | 47,948 | 58,436 | 102,702 | 116,685
Other |  |  |  |
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |  |
Investment income before investment expenses | 21,692 | 20,663 | 40,415 | 38,588
Cash and cash equivalents |  |  |  |
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |  |
Investment income before investment expenses | $ 12,333 | $ 15,399 | $ 23,443 | $ 30,121

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