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Business Segment Reporting - Narrative (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Segment Reporting Information [Line Items] |  |  |
Interest expense | $ 186.0 | $ 144.0 | $ 109.4
Restatement Adjustment |  |  |
Segment Reporting Information [Line Items] |  |  |
Interest expense |  | 24.4 |
Servicing |  |  |
Segment Reporting Information [Line Items] |  |  |
Percentage of Revenue | 0.86 |  |
Servicing | Restatement Adjustment |  |  |
Segment Reporting Information [Line Items] |  |  |
Interest expense |  | 23.7 |
Originations | Restatement Adjustment |  |  |
Segment Reporting Information [Line Items] |  |  |
Interest expense |  | $ 0.7 |

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