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Residential Mortgage Loans - Additional Information (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 USD ($) State Investment | Jun. 30, 2025 USD ($) State Investment | Dec. 31, 2024 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Mortgage loans held for sale-at fair value | $ 698,367 | $ 698,367 | $ 519,885
Variable Interest Entity, Primary Beneficiary |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Net consolidated assets (liabilities) | 30,000 | 30,000 |
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 | $ 698,000 | $ 698,000 | $ 520,000
Number of investments | Investment | 832 | 832 |
Residential mortgage loans held for sale-unpaid principal balance | $ 690,000 | $ 690,000 |
Number of states | State | 46 | 46 |
Unpaid principal balance of loan | 76.00% | 99.00% |
Commitments to purchase and fund mortgage loans |  | $ 230,000 |
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% | 24.00% |
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% | 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 | 0 |
Minimum | 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 | 0.00% | 0.00% |
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% | 6.00% |
Net worth for debt covenants | $ 74,000 | $ 74,000 |
Minimum net worth for debt covenants | $ 45,000 | 45,000 |
Radian Mortgage Capital Trust 2025-J1 |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Private offering of mortgage loans |  | 368,000 |
Radian Mortgage Capital Trust 2025-J2 |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Private offering of mortgage loans |  | $ 396,000 |

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