Loss Reserves - Reconciliation of Beginning and Ending Balances (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Loss Reserve [Roll Forward]
Reserve at beginning of period	$ 505,379	$ 557,988
Less reinsurance recoverable	33,302	28,240
Net reserve at beginning of period	472,077	529,748
Losses and LAE incurred in respect of delinquency notices received in:
Current year	158,317	137,626
Prior years	(181,876)	(148,948)
Total losses incurred	(23,559)	(11,322)
Losses and LAE paid in respect of delinquency notices received in:
Current year	133	153
Prior years	33,138	33,679
Total losses paid	33,271	33,832
Net reserve at end of period	415,247	484,594
Plus reinsurance recoverable	45,327	40,934
Reserve at end of period	$ 460,574	$ 525,528