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INVESTMENTS - Schedule of Net Investment Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |  |
Investment income before investment expenses | $ 297,663 | $ 112,494 | $ 557,178 | $ 201,672
Investment expenses | (5,001) | (5,283) | (10,138) | (10,770)
Net investment income | 292,662 | 107,211 | 547,040 | 190,902
Fixed maturity investments trading |  |  |  |
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |  |
Investment income before investment expenses | 169,739 | 76,547 | 325,239 | 138,964
Short term investments |  |  |  |
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |  |
Investment income before investment expenses | 50,231 | 4,397 | 83,181 | 5,533
Equity investments |  |  |  |
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |  |
Investment income before investment expenses | 2,766 | 4,516 | 6,165 | 7,270
Catastrophe bonds |  |  |  |
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |  |
Investment income before investment expenses | 49,522 | 20,235 | 88,353 | 37,595
Other |  |  |  |
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |  |
Investment income before investment expenses | 20,820 | 6,894 | 45,391 | 12,446
Cash and cash equivalents |  |  |  |
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |  |
Investment income before investment expenses | $ 4,585 | $ (95) | $ 8,849 | $ (136)

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