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Mortgage Loan Servicing and Loans Originated for Sale (Narrative) (Details)
12 Months Ended
Jun. 30, 2017
USD ($)
category
Jun. 30, 2016
USD ($)
category
Jun. 30, 2015
USD ($)
Servicing Assets at Fair Value [Line Items]      
Escrow balance $ 61,000 $ 56,000  
CPR assumption (weighted-average) 17.02% 19.68%  
Weighted-average discount rate 9.11% 9.07%  
MSA net carrying value $ 739,000 $ 627,000  
Mortgage servicing assets, fair value 811,000 627,000 $ 470,000
Allowance for mortgage servicing assets $ 158,000 $ 168,000 248,000
Number of categories for mortgage servicing assets | category 8 9  
Additions $ 269,000 $ 394,000 150,000
Amortization 167,000 243,000 60,000
Interest-only strips, fair value 31,000 47,000  
Unrealized gain on interest-only strips, gross 31,000 47,000  
Interest-only strips, unamortized cost 0 0  
Additions to interest-only strips 0 0 0
Amortization of interest-only strips 0 1,000 $ 1,000
Loans Serviced for Others [Member]      
Servicing Assets at Fair Value [Line Items]      
Escrow balance $ 546,000 $ 482,000  
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% 14.00% 13.00%