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Securitizations and Variable Interests Entities - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Servicing Assets at Fair Value [Line Items] |  |  |
Average period to securitization | 30 days |  |
Financing Receivable, Threshold Period Past Due | 60 days | 60 days |
Mortgages Held-for-sale, Fair Value Disclosure | $ 674.2 | $ 617.8 |
Variable Interest Entity, Primary Beneficiary | Warehouse Mortgage Loan Financing Facility |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |
Deposit Liabilities, Collateral Issued, Financial Instruments | 150.0 |  |
Mortgages Held-for-sale, Fair Value Disclosure | 119.5 |  |
Variable Interest Entity, Primary Beneficiary | Mortgage Warehouse Agreement [Member] |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |
Mortgages Held-for-sale, Fair Value Disclosure | $ 150.1 |  |
Ginnie Mae |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |
Percentage of transferred residential loans serviced 60 days or more past due | 8.00% | 8.30% |
Financing Receivable, Threshold Period Past Due | 60 days |  |
Forward Loans |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |
MSRs retained | $ 183.0 | $ 234.7 | $ 222.7
Percentage of transferred residential loans serviced 60 days or more past due | 2.80% | 2.50% |

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