v3.25.2
Loss And Loss Adjustment Expense Reserves (Activity In The Reserves For Losses And Loss Adjustment Expenses) (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]    
Gross reserves, beginning of period $ 3,152,031 $ 2,785,702
Reinsurance recoverables on unpaid losses 28,645 32,148
Net reserves, beginning of period 3,123,386 2,753,554
Incurred losses and loss adjustment expenses related to:    
Current year 2,207,746 1,832,701
Prior years (46,896) 7,978
Total incurred losses and loss adjustment expenses 2,160,850 1,840,679
Loss and loss adjustment expense payments related to:    
Current year 938,379 801,750
Prior years 896,037 846,290
Total payments 1,834,416 1,648,040
Net reserves, end of period 3,449,820 2,946,193
Reinsurance recoverables on unpaid losses, end of period 162,340 30,210
Gross reserves, end of period $ 3,612,160 $ 2,976,403