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Residential Mortgage Loans - Additional Information (Details) $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2024 USD ($) State Investment | Jan. 31, 2025 USD ($) | Jun. 30, 2024 | Dec. 31, 2023 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Mortgage loans held for sale-at fair value | $ 519,885 |  |  | $ 32,755
Variable Interest Entity, Primary Beneficiary |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Net consolidated assets (liabilities) | 12,000 |  |  |
Residential Mortgage Loans Held for Sale |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Mortgage loans held for sale-at fair value | $ 520,000 |  |  | $ 33,000
Number of investments | Investment | 808 |  |  |
Residential mortgage loans held for sale-unpaid principal balance | $ 521,000 |  |  |
Number of states | State | 44 |  |  |
Commitments to purchase and fund mortgage loans | $ 52,000 |  |  |
Unpaid principal balance of loans | 63.00% |  | 97.00% |
Residential Mortgage Loans Held for Sale | California |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Percentage of loans on properties | 24.00% |  |  |
Residential Mortgage Loans Held for Sale | California | Subsequent Event |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Residential mortgage loans held for sale for FEMA designated areas |  | $ 3,000 |  |
Residential Mortgage Loans Held for Sale | California | Maximum [Member] |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Percentage of loans for FEMA Designated Areas | 1.00% |  |  |
Residential Mortgage Loans Held for Sale | Other State |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Percentage of loans on properties | 10.00% |  |  |
Residential Mortgage Loans Held for Sale | Financial Asset, Equal to or Greater than 90 Days Past Due |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Number of investments | Investment | 0 |  |  |
Radian Mortgage Capital | Residential Mortgage Loans Held for Sale |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Percentage of net worth for debt covenants | 6.00% |  |  |
Net worth for debt covenants | $ 103,000 |  |  |
Minimum net worth for debt covenants | 36,000 |  |  |
Radian Mortgage Capital Trust 2024-J1 |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Private offering of mortgage loans | 349,000 |  |  |
Radian Mortgage Capital Trust 2024-J2 |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Private offering of mortgage loans | $ 423,000 |  |  |

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