Reinsurance - Net Premiums Written and Earned, Insurance (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Ceded Credit Risk [Line Items]
Direct premiums written	$ 248,245	$ 250,925	$ 492,917	$ 501,305
Ceded premiums written	(31,009)	3,164	(44,473)	8,828
Net Premiums Written	217,236	255,627	448,444	513,003
Direct premiums earned	259,314	263,947	517,729	531,405
Ceded premiums earned	(45,885)	(11,594)	(71,062)	(26,193)
Net Premiums Earned	213,429	253,892	446,667	508,082
Ceding commissions earned	5,052	3,424	10,303	8,558
Ceded losses	(1,218)	(15,093)	(2,384)	(27,860)
Deferred ceding commissions	23,000		23,000		$ 27,000
Radian Guaranty | Eagle Re 2019-1 Ltd. and Eagle Re 2020-1 Ltd.
Ceded Credit Risk [Line Items]
Ceded premiums earned	(21,000)
Mortgage
Ceded Credit Risk [Line Items]
Direct premiums written	245,448	243,808	488,232	485,026
Assumed premiums written	0	1,538	0	2,870
Ceded premiums written	(30,909)	3,298	(44,273)	9,108
Direct premiums earned	256,517	256,830	513,044	515,126
Assumed premiums earned	0	1,539	0	2,870
Ceded premiums earned	(45,785)	(11,460)	(70,862)	(25,913)
homegenius
Ceded Credit Risk [Line Items]
Direct premiums written	2,797	7,117	4,685	16,279
Ceded premiums written	(100)	(134)	(200)	(280)
Direct premiums earned	2,797	7,117	4,685	16,279
Ceded premiums earned	$ (100)	$ (134)	$ (200)	$ (280)