Reserves for Losses and Loss Settlement Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Gross liability for losses and loss settlement expenses at beginning of year	$ 1,638,755	$ 1,497,274	$ 1,514,265
Ceded losses and loss settlement expenses	(191,640)	(146,875)	(112,900)
Net liability for losses and loss settlement expenses at beginning of year	1,447,115	1,350,399	1,401,365
Losses and loss settlement expenses incurred for claims occurring during
Current year	745,813	701,664	624,411
Prior years	(1,208)	67,750	12,890
Total incurred	744,605	769,414	637,301
Losses and loss settlement expense payments for claims occurring during
Current year	186,322	191,899	215,891
Prior years	406,699	480,800	472,377
Total paid	593,021	672,699	688,268
Net liability for losses and loss settlement expenses at end of year	1,598,699	1,447,115	1,350,399
Ceded losses and loss settlement expenses	198,083	191,640	146,875
Gross liability for losses and loss settlement expenses at end of year	$ 1,796,782	$ 1,638,755	$ 1,497,274