v3.25.1
Unpaid Losses And Loss Adjustment Expenses (Reconciliation Of Consolidated Reserves For Losses And Loss Adjustment Expenses) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]    
Gross reserves for losses and loss adjustment expenses, beginning of year $ 26,633,094 $ 23,483,321
Reinsurance recoverable on unpaid losses, beginning of year 11,120,367 8,820,567
Net reserves for losses and loss adjustment expenses, beginning of year 15,512,727 14,662,754
Effect of foreign currency rate changes on beginning of year balance 56,701 (33,620)
Adjusted net reserves for losses and loss adjustment expenses, beginning of year 15,569,428 14,629,134
Incurred losses and loss adjustment expenses, current accident year 1,404,772 1,364,770
Incurred losses and loss adjustment expenses, prior accident years (150,107) (77,023)
Total incurred losses and loss adjustment expenses 1,254,665 1,287,747
Payments, current accident year 50,284 75,509
Payments, prior accident years 901,098 819,185
Total payments 951,382 894,694
Effect of foreign currency rate changes on current year activity 54 (1,018)
Net reserves for losses and loss adjustment expenses of Markel CATCo Re (121) (16,338)
Net reserves for losses and loss adjustment expenses, end of period 15,872,644 15,004,831
Reinsurance recoverable on unpaid losses 12,015,613 9,140,124
Gross reserves for losses and loss adjustment expenses, end of period $ 27,888,257 $ 24,144,955