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Short-Term Debt - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Jul. 01, 2022
Short-term Debt [Line Items]      
Average balance of short-term debt $ 1,170.0    
Accrued interest payable on short-term debt 7.0 $ 7.0  
Convertible notes      
Short-term Debt [Line Items]      
Repurchased debt instrument, face amount 33.0    
Gain (loss) on extinguishment of debt 0.1    
Debt instrument, face amount 144.0    
Riverbend Funding, LLC      
Short-term Debt [Line Items]      
Promissory notes     $ 43.0
Debt instrument, periodic payment, principal 5.0    
Riverbend Funding, LLC | Minimum      
Short-term Debt [Line Items]      
Fixed interest rate (as a percentage)     6.00%
Riverbend Funding, LLC | Maximum      
Short-term Debt [Line Items]      
Fixed interest rate (as a percentage)     8.00%
Servicer advance financing      
Short-term Debt [Line Items]      
Accrued interest payable on short-term debt 0.5    
Unamortized capitalized commitment costs $ 0.5