v3.26.1
INVESTMENTS - Schedule of Fair Value of Fixed Maturity Investments Trading (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Schedule of Investments [Line Items]    
Total fixed maturity investments trading $ 25,185,430 $ 24,884,323
U.S. treasuries    
Schedule of Investments [Line Items]    
Total fixed maturity investments trading 9,308,212 10,641,503
Corporate    
Schedule of Investments [Line Items]    
Total fixed maturity investments trading 9,916,723 8,528,828
Residential mortgage-backed    
Schedule of Investments [Line Items]    
Total fixed maturity investments trading 2,690,648 2,606,882
Asset-backed    
Schedule of Investments [Line Items]    
Total fixed maturity investments trading 1,688,500 1,606,790
Non-U.S. government    
Schedule of Investments [Line Items]    
Total fixed maturity investments trading 683,983 691,912
Agencies    
Schedule of Investments [Line Items]    
Total fixed maturity investments trading 560,030 486,817
Commercial mortgage-backed    
Schedule of Investments [Line Items]    
Total fixed maturity investments trading $ 337,334 $ 321,591