Reinsurance - Effect of Reinsurance Programs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Ceded Credit Risk [Line Items]
Direct premiums written	$ 994,323	$ 992,418	$ 1,024,660
Ceded premiums written	(79,868)	(12,652)	(48,279)
Total net premiums written	914,455	983,791	983,447
Direct premiums earned	1,040,406	1,050,029	1,144,361
Assumed premiums earned	0	4,025	7,066
Ceded premiums earned	(120,828)	(72,923)	(114,244)
Total net premiums earned	919,578	981,131	1,037,183
Ceding commissions earned	21,719	18,998	31,745
Ceded losses	773
Ceded losses		(41,980)	(4,570)
Deferred ceding commissions	20,000	27,000
Mortgage insurance
Ceded Credit Risk [Line Items]
Direct premiums written	983,858	967,996	984,995
Assumed premiums written	0	4,025	7,066
Ceded premiums written	(79,618)	(12,148)	(47,515)
Direct premiums earned	1,029,941	1,025,607	1,104,696
Assumed premiums earned	0	4,025	7,066
Ceded premiums earned	(120,578)	(72,419)	(113,480)
Title insurance
Ceded Credit Risk [Line Items]
Direct premiums written	10,465	24,422	39,665
Ceded premiums written	(250)	(504)	(764)
Direct premiums earned	10,465	24,422	39,665
Ceded premiums earned	$ (250)	$ (504)	$ (764)