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Schedule IV Reinsurance (Tables)
 12 Months Ended
Dec. 31, 2021
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]  
SEC Schedule, 12-17, Insurance Companies, Reinsurance, Insurance Premiums Earned
($ in thousands)Gross
Amount		Ceded
to Other
Companies		Assumed
from Other
Companies		Net
Amount		Assumed Premiums
as a Percentage
of Net Premiums
2021
Mortgage insurance$1,104,696 $113,480 $7,066 $998,282 0.71%
Title insurance39,665 764 — 38,901 0.00%
Total$1,144,361 $114,244 $7,066 $1,037,183 0.68%
2020
Mortgage insurance$1,263,684 $183,131 $12,214 $1,092,767 1.12%
Title insurance22,843 289 — 22,554 0.00%
Total$1,286,527 $183,420 $12,214 $1,115,321 1.10%
2019
Mortgage insurance$1,233,528 $109,696 $10,382 $1,134,214 0.92%
Title insurance11,342 207 — 11,135 0.00%
Total$1,244,870 $109,903 $10,382 $1,145,349 0.91%