Loss Reserves - Reconciliation of Beginning and Ending Balances (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Loss Reserve [Roll Forward]
Reserve at beginning of period	$ 462,662	$ 505,379
Less reinsurance recoverable	47,281	33,302
Net reserve at beginning of period	415,381	472,077
Losses and LAE incurred in respect of delinquency notices received in:
Current year	59,497	53,436
Prior years	(49,906)	(48,881)
Total losses incurred	9,591	4,555
Losses and LAE paid in respect of delinquency notices received in:
Current year	0	0
Prior years	11,803	11,385
Total losses paid	11,803	11,385
Net reserve at end of period	413,169	465,247
Plus reinsurance recoverable	51,864	39,200
Reserve at end of period	$ 465,033	$ 504,447