Statutory Information - Statutory Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Radian Guaranty
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	$ 388,372	$ 382,173
Statutory policyholders’ surplus	686,189		$ 619,584
Other mortgage insurance subsidiaries
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	(882)	(261)
Statutory policyholders’ surplus	16,773		17,444
Radian Title Insurance
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	1,015	$ 808
Statutory policyholders’ surplus	$ 41,936		$ 41,108