Reinsurance - Schedule of Premiums Written and Earned Along with Losses and Settlement Expenses Incurred (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
WRITTEN
Direct	$ 1,531,656	$ 1,313,093	$ 1,107,303
Reinsurance assumed	33,830	34,261	29,129
Reinsurance ceded	(323,950)	(289,821)	(244,344)
Net	1,241,536	1,057,533	892,088
EARNED
Direct	1,425,165	1,222,346	1,062,608
Reinsurance assumed	35,680	30,950	27,651
Reinsurance ceded	(316,409)	(272,393)	(224,512)
Net	1,144,436	980,903	865,747
LOSSES AND SETTLEMENT EXPENSES INCURRED
Direct	776,448	703,903	608,638
Reinsurance assumed	22,813	18,087	18,783
Reinsurance ceded	(284,885)	(265,388)	(184,537)
Net	$ 514,376	$ 456,602	$ 442,884