Reinsurance - Total VIE Assets and Liabilities of Eagle Re Issuers (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Ceded Credit Risk [Line Items]
Total assets	$ 8,765,386	$ 8,663,988
Total liabilities	4,178,560	4,040,130
Excess-of-Loss Program | Radian Guaranty
Ceded Credit Risk [Line Items]
Total assets	672,123	729,181
Total liabilities	672,123	729,181
Eagle Re 2023-1 Ltd. | Excess-of-Loss Program | Radian Guaranty | Mortgage Insurance revenues
Ceded Credit Risk [Line Items]
Total assets	311,921	326,855
Total liabilities	311,921	326,855
Eagle Re 2021-2 Ltd. | Excess-of-Loss Program | Radian Guaranty | Mortgage Insurance revenues
Ceded Credit Risk [Line Items]
Total assets	224,315	247,442
Total liabilities	224,315	247,442
Eagle Re 2021-1 Ltd. | Excess-of-Loss Program | Radian Guaranty | Mortgage Insurance revenues
Ceded Credit Risk [Line Items]
Total assets	135,887	154,884
Total liabilities	$ 135,887	$ 154,884