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Derivative and Other Financial Instruments with Off-Balance Sheet Risks: Schedule of Undisbursed Funds Commitments (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Jun. 30, 2017
Derivative [Line Items]    
Loans and Leases Receivable, Loans in Process $ 8,189 $ 9,015
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability 13,688 29,342
Undisbursed Lines of Credit - Mortgage Loans    
Derivative [Line Items]    
Loans and Leases Receivable, Loans in Process 8,189 9,015
Undisbursed Lines of Credit - Commercial Business Loans    
Derivative [Line Items]    
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability 674 646
Undisbursed Lines of Credit - Consumer Loans    
Derivative [Line Items]    
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability 549 562
Commitments to Extend Credit, Loans to be Held for Investment    
Derivative [Line Items]    
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability $ 4,276 $ 19,119