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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
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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)

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