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Securitizations and Variable Interest Entities - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Sep. 30, 2023 | Dec. 31, 2023
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |  |  |  |  |
Average period to securitization |  |  | 30 days |  |  |
MSRs retained | $ 67.7 | $ 31.5 | $ 102.4 | $ 62.6 |  |
Percentage of loan transferred through securitization 60 days or more past due |  |  | 2.50% |  | 2.80% |
Threshold period past due | 60 days |  | 60 days |  |  | 60 days
Mortgage Warehouse Agreement | Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |  |  |  |  |
Mortgages Held-for-sale, Fair Value Disclosure | $ 200.1 |  | $ 200.1 |  |  | $ 150.1
Warehouse Mortgage Loan Financing Facility | Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |  |  |  |  |
Loans held for sale pledged as a collateral | 200.0 |  | 200.0 |  |  | 150.0
Mortgages Held-for-sale, Fair Value Disclosure | $ 228.7 |  | $ 228.7 |  |  | $ 119.5
Ginnie Mae Loans |  |  |  |  |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |  |  |  |  |
Percentage of loan transferred through securitization 60 days or more past due |  |  | 7.30% |  | 8.00% |
Threshold period past due | 60 days |  | 60 days |  |  | 60 days

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