v3.25.4
INVESTMENTS - Schedule of Net Realized and Unrealized Gains (Losses) on Investments (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Gain (Loss) on Securities [Line Items]      
Net realized and unrealized gains (losses) on investments $ 1,181,268 $ (27,840) $ 414,522
Fixed maturity investments trading      
Gain (Loss) on Securities [Line Items]      
Fixed maturity investments trading 419,857 (246,423) 292,054
Fixed maturity investments trading | Not Designated as Hedging Instrument      
Gain (Loss) on Securities [Line Items]      
Investment-related derivatives 84,100 (136,200) (67,000)
Investments-related derivatives      
Gain (Loss) on Securities [Line Items]      
Investment-related derivatives 638,534 (57,279) (68,272)
Equity investments      
Gain (Loss) on Securities [Line Items]      
Equity investments 49,374 10,976 45,751
Equity investments | Not Designated as Hedging Instrument      
Gain (Loss) on Securities [Line Items]      
Investment-related derivatives 138,900 2,300 (1,900)
Catastrophe bonds      
Gain (Loss) on Securities [Line Items]      
Other investments (10,978) 62,353 101,897
Fund and direct private equity investments      
Gain (Loss) on Securities [Line Items]      
Other investments 84,481 202,533 43,092
Commodity | Not Designated as Hedging Instrument      
Gain (Loss) on Securities [Line Items]      
Investment-related derivatives $ 415,500 $ 76,500 $ 700