Reinsurance - Summary of Premiums Earned and Losses Incurred (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Premiums earned:
Direct	$ 289,072	$ 287,223	$ 864,191	$ 876,541
Assumed	2,254	2,660	6,501	7,551
Ceded	(39,215)	(35,039)	(107,644)	(122,664)
Net premiums earned	252,111	254,844	763,048	761,428
Losses incurred:
Direct	(112,435)	17,265	(242,861)	103,319
Assumed	21	(97)	(340)	(43)
Ceded	7,360	3,598	19,775	(13,710)
Losses incurred, net	(105,054)	20,766	(223,426)	89,566
Quota Share Reinsurance Transactions
Premiums earned:
Ceded	(19,348)	(22,911)	(56,721)	(90,284)
Losses incurred:
Ceded	7,360	3,598	19,775	(13,710)
Profit commission on reinsurance	47,255	45,078	135,049	108,000
Ceding commission on reinsurance	13,321	13,599	38,355	39,657
Excess of Loss Reinsurance Transactions
Premiums earned:
Ceded	$ (19,867)	$ (12,128)	$ (50,923)	$ (32,380)