Losses and LAE - Schedule of Provision for Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Effects of Reinsurance [Line Items]
Total provision for losses	$ 6,889	$ (8,135)	$ (1,890)	$ (46,696)
Mortgage insurance
Effects of Reinsurance [Line Items]
Total provision for losses	6,346	(8,257)	(2,309)	(46,744)
Title insurance
Effects of Reinsurance [Line Items]
Total provision for losses	$ 543	$ 122	$ 419	$ 48