Statutory Information - Statutory Financial Statements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Radian Guaranty
Statutory Accounting Practices [Line Items]
Statutory net income	$ 803,804	$ 1,091,946	$ 762,609
Statutory policyholders' surplus	619,584	758,467	1,105,266
Other mortgage insurance subsidiaries
Statutory Accounting Practices [Line Items]
Statutory net income	311	1,957	1,669
Statutory policyholders' surplus	17,444	17,086	14,524
Radian Title Insurance
Statutory Accounting Practices [Line Items]
Statutory net income	1,844	2,589	6,862
Statutory policyholders' surplus	$ 41,108	$ 39,285	$ 36,599