v3.26.3
Reinsurance (Reinsurance Recoverable , Allowance for Credit Loss) (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]    
Reinsurance Recoverable, Allowance for Credit Loss $ 234,696 $ 18,122
Fronting    
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]    
Reinsurance Recoverable, Allowance for Credit Loss 206,801 1,454
Underwriting    
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]    
Reinsurance Recoverable, Allowance for Credit Loss $ 27,895 $ 16,668