Reinsurance - Reinsurance Recoverables and Ceded Premiums (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Insurance [Abstract]
Unpaid losses and loss adjustment expenses ceded	$ 429,752	$ 435,986	$ 385,146	$ 381,338
Paid losses and loss adjustment expense ceded	107,463	107,228
Loss portfolio transfer	35,584	38,145
Allowance for credit losses	(2,295)	0
Reinsurance recoverables	570,504	581,359
Ceded unearned premium	$ 197,044	$ 157,645