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Fair Value of Financial Assets and Liabilities - Summary of Adverse Changes in Estimates for Securitization Notes and Residual Trust Certificates (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Jun. 30, 2021
Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Securitization notes and residual trust certificates, effect of 25% increase (decrease) in measurement input $ (1,410) $ (22)
Securitization notes and residual trust certificates, effect of 50% increase (decrease) in measurement input (2,295) (44)
Loss rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Securitization notes and residual trust certificates, effect of 25% increase (decrease) in measurement input (729) (24)
Securitization notes and residual trust certificates, effect of 50% increase (decrease) in measurement input (964) (48)
Prepayment rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Securitization notes and residual trust certificates, effect of 25% increase (decrease) in measurement input (545) (13)
Securitization notes and residual trust certificates, effect of 50% increase (decrease) in measurement input $ (519) $ (27)