Schedule IV - Reinsurance, Insurance Premiums Earned (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Gross Amount	$ 1,040,406	$ 1,050,029	$ 1,144,361
Ceded to Other Companies	120,828	72,923	114,244
Assumed from Other Companies	0	4,025	7,066
Net premiums earned	$ 919,578	$ 981,131	$ 1,037,183
Assumed Premiums as a Percentage of Net Premiums	0.00%	0.41%	0.68%
Mortgage Insurance
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Gross Amount	$ 1,029,941	$ 1,025,607	$ 1,104,696
Ceded to Other Companies	120,578	72,419	113,480
Assumed from Other Companies	0	4,025	7,066
Net premiums earned	$ 909,363	$ 957,213	$ 998,282
Assumed Premiums as a Percentage of Net Premiums	0.00%	0.42%	0.71%
Title Insurance
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Gross Amount	$ 10,465	$ 24,422	$ 39,665
Ceded to Other Companies	250	504	764
Assumed from Other Companies	0	0	0
Net premiums earned	$ 10,215	$ 23,918	$ 38,901
Assumed Premiums as a Percentage of Net Premiums	0.00%	0.00%	0.00%