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Commitments - Narrative (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2022 | Dec. 31, 2021
Other Commitments [Line Items] |  |
Threshold of outstanding principal balance on maximum claim amount (as a percent) | 98.00% |
Floating Rate Reverse Mortgage Loans |  |
Other Commitments [Line Items] |  |
Additional borrowing capacity to borrowers | $ 1,700.0 | $ 1,500.0
Funded amount in connection with reverse mortgage loans | 181.2 |
Forward Mortgage Loan Interest Rate Lock Commitments |  |
Other Commitments [Line Items] |  |
Short-term commitments to lend | 1,300.0 |
Reverse loans IRLCs |  |
Other Commitments [Line Items] |  |
Short-term commitments to lend | $ 19.2 |
Customer Concentration Risk | Unpaid Principal Balance | Rithm |  |
Other Commitments [Line Items] |  |
Concentration risk (percent) | 18.00% |
Customer Concentration Risk | Loan Count | Rithm |  |
Other Commitments [Line Items] |  |
Concentration risk (percent) | 28.00% |
Customer Concentration Risk | Delinquent Loans | Rithm |  |
Other Commitments [Line Items] |  |
Concentration risk (percent) | 69.00% |

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