Loss Reserves - Reconciliation of Changes in Loss Reserves (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Loss Reserve [Roll Forward]
Reserve at beginning of year	$ 462,662	$ 505,379	$ 557,988
Less reinsurance recoverable	47,281	33,302	28,240
Net reserve at beginning of year	409,829	415,381	472,077	$ 529,748
Losses and LAE incurred in respect of delinquent notices received in:
Current year	204,082	197,615	187,658
Prior years	(155,179)	(212,476)	(208,514)
Total losses incurred	48,903	(14,861)	(20,856)
Losses and LAE paid in respect of delinquent notices received in:
Current year	1,477	946	566
Prior years	54,265	43,585	45,645
Reinsurance terminations	(1,287)	(2,696)	(9,396)
Total losses paid	54,455	41,835	36,815
Net reserve at end of year	409,829	415,381	472,077
Plus reinsurance recoverable	65,055	47,281	33,302
Reserve at end of year	$ 474,884	$ 462,662	$ 505,379