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Fair Value of Financial Assets and Liabilities - Summary of Adverse Changes in Estimates for Residual Trust Certificates Inputs (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Jun. 30, 2021
Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Residual trust certificates, effect of 25% increase in measurement input $ (6) $ (21)
Residual trust certificates, effect of 50% increase in measurement input (11) (42)
Loss rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Residual trust certificates, effect of 25% increase in measurement input (8) (28)
Residual trust certificates, effect of 50% increase in measurement input (16) (56)
Prepayment rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Residual trust certificates, effect of 25% increase in measurement input (2) (10)
Residual trust certificates, effect of 50% increase in measurement input $ (3) $ (20)