v3.26.1
Statutory Information - Schedule of Statutory Net Income (Loss) and Statutory Policyholders' Surplus (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Statutory Accounting Practices [Line Items]    
Statutory policyholders' surplus [1] $ 1,610,000  
Radian Guaranty    
Statutory Accounting Practices [Line Items]    
Statutory net income (loss) 150,431 $ 186,096
Statutory policyholders' surplus 656,891 646,115
Other Mortgage Insurance Subsidiaries    
Statutory Accounting Practices [Line Items]    
Statutory net income (loss) 113 477
Statutory policyholders' surplus $ 17,366 $ 17,057
[1] Includes a $620 million letter of credit, which is pledged as FAL and has not been called upon during 2026.