Statutory Information - Statutory Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Radian Guaranty
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	$ 382,173	$ 578,470
Statutory policyholders’ surplus	668,333		$ 758,467
Other mortgage subsidiaries
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	(261)	1,082
Statutory policyholders’ surplus	17,268		17,086
Radian Title Insurance
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	808	$ 1,964
Statutory policyholders’ surplus	$ 40,055		$ 39,285