Reserve for Loss and Loss Expense (Tables)

9 Months Ended

Sep. 30, 2026

Insurance Loss Reserves [Abstract]

Schedule of Roll Forward of Reserve for Loss and Loss Expense

The table below provides a roll forward of the reserve for loss and loss expense for beginning and ending reserve balances:


						Nine Months ended September 30,
($ in thousands)						2026						2025
Gross reserve for loss and loss expense, at beginning of period						$	7,225,398					6,589,801
Less: reinsurance recoverable on unpaid loss and loss expense, at beginning of period						877,843						1,022,245
Net reserve for loss and loss expense, at beginning of period						6,347,555						5,567,556
Incurred loss and loss expense for claims occurring in the:
Current year						2,417,011						2,319,158
Prior years						(22,545)						70,096
Total incurred loss and loss expense						2,394,466						2,389,254
Paid loss and loss expense for claims occurring in the:
Current year						610,602						594,811
Prior years						1,210,969						1,199,822
Total paid loss and loss expense						1,821,571						1,794,633
Net reserve for loss and loss expense, at end of period						6,920,450						6,162,177
Add: Reinsurance recoverable on unpaid loss and loss expense, at end of period						1,086,045						914,245
Gross reserve for loss and loss expense, at end of period						8,006,495						7,076,422