Loss Reserves - Reconciliation of Beginning and Ending Balances (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 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	102,553	89,465
Prior years	(116,270)	(100,710)
Total losses incurred	(13,717)	(11,245)
Losses and LAE paid in respect of delinquency notices received in:
Current year	52	25
Prior years	23,040	22,272
Total losses paid	23,092	22,297
Net reserve at end of period	435,268	496,206
Plus reinsurance recoverable	42,346	34,475
Reserve at end of period	$ 477,614	$ 530,681