Reinsurance - Net Premiums Written and Earned, Insurance (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Ceded Credit Risk [Line Items]
Direct premiums written	$ 252,383	$ 244,672
Ceded premiums written, net	(18,648)	(13,464)
Net Premiums Written	233,735	231,208
Direct premiums earned	262,655	258,415
Ceded premiums earned	(26,798)	(25,177)
Total net premiums earned	235,857	233,238
Ceding commissions earned	6,113	5,251
Ceded losses	2,195
Ceded losses		(1,166)
Deferred ceding commissions	18,000		$ 20,000
Mortgage insurance
Ceded Credit Risk [Line Items]
Direct premiums written	250,435	242,784
Ceded premiums written, net	(18,558)	(13,364)
Direct premiums earned	260,707	256,527
Ceded premiums earned	(26,708)	(25,077)
Title insurance
Ceded Credit Risk [Line Items]
Direct premiums earned	1,948	1,888
Ceded premiums earned	(90)	(100)
Real estate
Ceded Credit Risk [Line Items]
Direct premiums written	1,948	1,888
Ceded premiums written, net	$ (90)	$ (100)