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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