v3.26.1
Loss And Loss Adjustment Expense Reserves (Activity In The Reserves For Losses And Loss Adjustment Expenses) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]    
Gross reserves, beginning of period $ 3,633,338 $ 3,152,031
Reinsurance recoverables on unpaid losses, beginning of period (34,008) (28,645)
Net reserves, beginning of period 3,599,330 3,123,386
Incurred losses and loss adjustment expenses related to:    
Current year 942,045 1,271,847
Prior years (9,095) (51,034)
Total incurred losses and loss adjustment expenses 932,950 1,220,813
Loss and loss adjustment expense payments related to:    
Current year 290,085 406,513
Prior years 629,443 529,188
Total payments 919,528 935,701
Net reserves, end of period 3,612,752 3,408,498
Reinsurance recoverables on unpaid losses, end of period 33,449 384,083
Gross reserves, end of period $ 3,646,201 $ 3,792,581