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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, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Sep. 30, 2024 | May 31, 2025 | Feb. 28, 2025 | Dec. 31, 2024
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |  |  |  |  |  |  |
Average period to securitization |  |  | 30 days |  |  |  |  |
MSRs retained | $ 82.4 | $ 67.7 | $ 142.9 | $ 102.4 |  |  |  |
Percentage of loan transferred through securitization 60 days or more past due |  |  | 2.00% |  | 2.70% |  |  |
Threshold period past due | 60 days |  | 60 days |  |  |  |  | 60 days
Maximum borrowing capacity |  |  |  |  |  | $ 350.0 |  |
Percentage Of The Limited Liability Company Interest | 100.00% |  | 100.00% |  |  |  | 100.00% |
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 | $ 200.0 |  | $ 200.0 |  |  |  |  | $ 200.0
Warehouse Mortgage Loan Financing Facility | Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |  |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |  |  |  |  |  |  |
Mortgages Held-for-sale, Fair Value Disclosure | 335.7 |  | 335.7 |  |  |  |  | 375.4
Loans held for sale pledged as a collateral | 200.0 |  | 200.0 |  |  |  |  | $ 200.0
Mortgage Warehouse Agreement Two | Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |  |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |  |  |  |  |  |  |
Mortgages Held-for-sale, Fair Value Disclosure | 286.2 |  | 286.2 |  |  |  |  |
Loans held for sale pledged as a collateral | 310.5 |  | 310.5 |  |  |  |  |
Maximum borrowing capacity | $ 350.0 |  | $ 350.0 |  |  |  |  |
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 |  |  | 5.10% |  | 7.00% |  |  |
Threshold period past due | 60 days |  | 60 days |  |  |  |  | 60 days

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