Loss Reserves - Reconciliation of Changes in Loss Reserves (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Loss Reserve [Roll Forward]
Reserve at beginning of year	$ 505,379	$ 557,988	$ 883,522
Less reinsurance recoverable	33,302	28,240	66,905
Net reserve at beginning of year	415,381	472,077	529,748	$ 816,617
Losses and LAE incurred in respect of delinquent notices received in:
Current year	197,615	187,658	149,565
Prior years	(212,476)	(208,514)	(404,130)
Total losses incurred	(14,861)	(20,856)	(254,565)
Losses and LAE paid in respect of delinquent notices received in:
Current year	946	566	362
Prior years	43,585	45,645	49,626
Reinsurance terminations	(2,696)	(9,396)	(17,684)
Total losses paid	41,835	36,815	32,304
Net reserve at end of year	415,381	472,077	529,748
Plus reinsurance recoverables	47,281	33,302	28,240
Reserve at end of year	$ 462,662	$ 505,379	$ 557,988