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Securitized Debt and Securitized Debt at Fair Value - Summary of Effective Interest Rate of Securitized Debt and Securitized Debt at Fair Value (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Debt Instrument [Line Items]    
Average outstanding unpaid principal balance $ 3,044,511 $ 2,331,672
Effective interest rate 5.23% 4.30%
Securitized debt    
Debt Instrument [Line Items]    
Interest expense - portfolio related $ 119,377 $ 75,191