Policy Acquisition Costs - Schedule of Policy Acquisition Costs Deferred and Amortized to Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Policy acquisition costs deferred and amortized to income
Deferred policy acquisition costs (DAC), beginning of year	$ 103,553	$ 88,425	$ 85,044
Deferred:
Direct commissions	277,553	236,145	200,917
Premium taxes	18,616	17,012	14,783
Ceding commissions	(39,458)	(47,592)	(42,115)
Net deferred	256,711	205,565	173,585
Amortized	232,405	190,437	170,204
DAC, end of year	127,859	103,553	88,425
Policy acquisition costs:
Amortized	232,405	190,437	170,204
Period costs:
Ceding commission - contingent	(5,882)	(4,303)	(4,053)
Other underwriting expenses	143,109	131,334	120,287
Total policy acquisition costs	$ 369,632	$ 317,468	$ 286,438