Schedule IV Reinsurance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Gross Amount	$ 1,144,361	$ 1,286,527	$ 1,244,870
Ceded to Other Companies	114,244	183,420	109,903
Assumed from Other Companies	7,066	12,214	10,382
Net premiums earned	$ 1,037,183	$ 1,115,321	$ 1,145,349
Assumed Premium as a Percentage of Net Premiums	0.68%	1.10%	0.91%
Mortgage Insurance
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Gross Amount	$ 1,104,696	$ 1,263,684	$ 1,233,528
Ceded to Other Companies	113,480	183,131	109,696
Assumed from Other Companies	7,066	12,214	10,382
Net premiums earned	$ 998,282	$ 1,092,767	$ 1,134,214
Assumed Premium as a Percentage of Net Premiums	0.71%	1.12%	0.92%
Title Insurance
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Gross Amount	$ 39,665	$ 22,843	$ 11,342
Ceded to Other Companies	764	289	207
Assumed from Other Companies	0	0	0
Net premiums earned	$ 38,901	$ 22,554	$ 11,135
Assumed Premium as a Percentage of Net Premiums	0.00%	0.00%	0.00%