Schedule IV - Reinsurance, Insurance Premiums Earned (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Gross Amount	$ 1,050,029	$ 1,144,361	$ 1,286,527
Ceded to Other Companies	72,923	114,244	183,420
Assumed from Other Companies	4,025	7,066	12,214
Net premiums earned	$ 981,131	$ 1,037,183	$ 1,115,321
Assumed Premiums as a Percentage of Net Premiums	0.41%	0.68%	1.10%
Mortgage Insurance
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Gross Amount	$ 1,025,607	$ 1,104,696	$ 1,263,684
Ceded to Other Companies	72,419	113,480	183,131
Assumed from Other Companies	4,025	7,066	12,214
Net premiums earned	$ 957,213	$ 998,282	$ 1,092,767
Assumed Premiums as a Percentage of Net Premiums	0.42%	0.71%	1.12%
Title Insurance
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Gross Amount	$ 24,422	$ 39,665	$ 22,843
Ceded to Other Companies	504	764	289
Assumed from Other Companies	0	0	0
Net premiums earned	$ 23,918	$ 38,901	$ 22,554
Assumed Premiums as a Percentage of Net Premiums	0.00%	0.00%	0.00%