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Unpaid Losses And Loss Adjustment Expenses (Tables)
9 Months Ended
Sep. 30, 2023
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]  
Reconciliation Of Consolidated Reserves For Losses And Loss Adjustment Expenses
The following table presents a reconciliation of consolidated beginning and ending reserves for losses and loss adjustment expenses.

Nine Months Ended September 30,
(dollars in thousands)20232022
Gross reserves for losses and loss adjustment expenses, beginning of year$20,947,898 $18,178,894 
Reinsurance recoverables on unpaid losses, beginning of year7,994,884 6,876,317 
Net reserves for losses and loss adjustment expenses, beginning of year12,953,014 11,302,577 
Effect of foreign currency rate changes on beginning of year balance16,246 (275,364)
Adjusted net reserves for losses and loss adjustment expenses, beginning of year12,969,260 11,027,213 
Incurred losses and loss adjustment expenses:
Current accident year3,934,969 3,420,906 
Prior accident years(169,754)(204,411)
Total incurred losses and loss adjustment expenses3,765,215 3,216,495 
Payments:
Current accident year419,998 350,684 
Prior accident years2,018,199 1,880,471 
Total payments2,438,197 2,231,155 
Effect of foreign currency rate changes on current year activity416 (7,499)
Change in net reserves for losses and loss adjustment expenses of Markel CATCo Re (see note 11)
(146,895)375,222 
Reinsurance recoverable for retroactive reinsurance transaction(125,067)— 
Net reserves for losses and loss adjustment expenses, end of period14,024,732 12,380,276 
Reinsurance recoverables on unpaid losses8,119,634 7,814,098 
Gross reserves for losses and loss adjustment expenses, end of period$22,144,366 $20,194,374