v3.26.3
Reinsurance (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Program Services Fronting        
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]        
Reinsurance Recoverable, Credit Loss Expense (Reversal)     $ 205,346 $ 0
Fronting        
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]        
Gross losses and loss adjustment expenses $ 2,100,000 $ 1,200,000 $ 4,200,000 $ 3,400,000