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Other Debt - Summary of Interest Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Debt Instrument [Line Items]        
Interest expense — portfolio related $ 47,583 $ 34,561 $ 135,062 $ 86,869
Interest expense — corporate debt 4,138 4,011 12,417 25,333
Total interest expense 51,721 38,572 147,479 112,202
Warehouse and Repurchase Facilities        
Debt Instrument [Line Items]        
Interest expense — portfolio related 4,943 3,798 15,685 11,678
Securitized debt        
Debt Instrument [Line Items]        
Interest expense — portfolio related $ 42,640 $ 30,763 $ 119,377 $ 75,191