Reinsurance - Summary of Premiums Earned and Losses Incurred (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Premiums earned:
Direct	$ 287,640	$ 289,072	$ 858,310	$ 864,191
Assumed	3,801	2,254	9,635	6,501
Ceded	(50,164)	(39,215)	(141,842)	(107,644)
Net premiums earned	241,277	252,111	726,103	763,048
Losses incurred:
Direct	6,627	(112,435)	2,044	(242,861)
Assumed	20	21	(7)	(340)
Losses incurred, net	(77)	(105,054)	(11,322)	(223,426)
Quota Share Reinsurance Transactions
Premiums earned:
Ceded	(32,693)	(19,348)	(90,012)	(56,721)
Losses incurred:
Ceded	(6,724)	7,360	(13,359)	19,775
Profit commission on reinsurance	30,698	47,255	97,218	135,049
Ceding commission on reinsurance	12,678	13,321	37,446	38,355
Excess of Loss Reinsurance Transactions
Premiums earned:
Ceded	$ (17,471)	$ (19,867)	$ (51,830)	$ (50,923)