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Mortgage Loan Servicing and Loans Originating for Sale - Fair Value (Details) - USD ($)
12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Servicing Asset at Fair Value, Amount    
Fair value, beginning of fiscal year $ 627,000 $ 1,015,000
Fair value, end of fiscal year 382,000 627,000
Valuation Allowance for Impairment of Recognized Servicing Assets    
Allowance, beginning of fiscal year 298,000 82,000
Impairment (recovery) provision (7,000) 216,000
Allowance, end of fiscal year $ 291,000 $ 298,000
Weighted-average discount rate 9.11% 9.11%
Weighted-average prepayment speed 26.07% 23.86%