Reinsurance - Total VIE Assets and Liabilities of Eagle Re Issuers (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Ceded Credit Risk [Line Items]
Total assets	$ 8,663,988	$ 7,593,933
Total liabilities	4,040,130	3,196,128
Excess-of-Loss Program | Radian Guaranty
Ceded Credit Risk [Line Items]
Total assets	729,181	964,909
Total liabilities	729,181	964,909
Eagle Re 2021-2 Ltd. | Excess-of-Loss Program | Radian Guaranty | Mortgage insurance
Ceded Credit Risk [Line Items]
Total assets	247,442	354,947
Total liabilities	247,442	354,947
Eagle Re 2023-1 Ltd. | Excess-of-Loss Program | Radian Guaranty | Mortgage insurance
Ceded Credit Risk [Line Items]
Total assets	326,855	353,077
Total liabilities	326,855	353,077
Eagle Re 2021-1 Ltd. | Excess-of-Loss Program | Radian Guaranty | Mortgage insurance
Ceded Credit Risk [Line Items]
Total assets	154,884	250,268
Total liabilities	154,884	250,268
Eagle Re 2020-1 Ltd. | Excess-of-Loss Program | Radian Guaranty | Mortgage insurance
Ceded Credit Risk [Line Items]
Total assets	0	6,617
Total liabilities	$ 0	$ 6,617