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Fair Value of Financial Assets and Liabilities - Fair Value of Senior Notes and Residual Trust Certificates (Details) - Senior Notes And Residual Trust Certificates - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value at beginning of period $ 16,170 $ 0
Additions 54,998 16,144
Cash received (due to payments or sales) (19,559) 0
Change in unrealized gain (loss) (509) 29
Accrued interest 595 0
Reversal of (impairment on) securities available for sale (17) (3)
Fair value at end of period $ 51,678 $ 16,170