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Mortgage Loan Servicing and Loans Originated for Sale (Narrative) (Details)
12 Months Ended
Jun. 30, 2018
USD ($)
category
Jun. 30, 2017
USD ($)
category
Jun. 30, 2016
USD ($)
Servicing Assets at Fair Value [Line Items]      
Escrow balance $ 18,000 $ 61,000  
CPR assumption (weighted-average) 13.42% 17.02%  
Weighted-average discount rate 9.11% 9.11%  
MSA net carrying value $ 916,000 $ 739,000  
Mortgage servicing assets, fair value 1,015,000 811,000 $ 627,000
Allowance for mortgage servicing assets $ 82,000 $ 158,000 168,000
Number of categories for mortgage servicing assets | category 6 8  
Additions $ 237,000 $ 269,000 394,000
Amortization 136,000 167,000 243,000
Interest-only strips, fair value 23,000 31,000  
Interest-only strips, unamortized cost 0    
Additions to interest-only strips 0 0 0
Amortization of interest-only strips 0   $ 1,000
Loans Serviced for Others [Member]      
Servicing Assets at Fair Value [Line Items]      
Escrow balance $ 577,000 $ 546,000  
Loans Originated for Sale [Member] | Sales to One Investor [Member]      
Servicing Assets at Fair Value [Line Items]      
Loans originated for sale, sold to a single investor 12.00% 12.00% 14.00%