Statutory Information - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) jurisdiction
Statutory capital requirements [Abstract]
Number of jurisdictions with risk-to-capital requirements | jurisdiction	16
Maximum permitted risk-to-capital ratio commonly applied	25 to 1
Insurance Subsidiaries
Statutory capital requirements [Abstract]
Percentage of statutory policyholders surplus used to determine maximum allowable dividends	10.00%
Adjusted statutory net income measurement period	3 years
Adjusted statutory net income dividend payment measurement period	2 years
Maximum
Statutory capital requirements [Abstract]
Risk to capital ratio	25
Mortgage Guaranty Insurance Corporation
Statutory capital requirements [Abstract]
Risk to capital ratio at end of period	10.2 to 1
Risk to capital ratio	10.2
Amount of policyholders position above or below required MPP	$ 3,600,000
Amount of required MPP	$ 2,200,000