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Derivative and Other Financial Instruments with Off-Balance Sheet Risks: Schedule of Undisbursed Funds Commitments (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Jun. 30, 2016
Derivative [Line Items]    
Undisbursed funds on existing lines of credit and commitments to originate loans $ 29,342 $ 22,728
Undisbursed Loan Funds - Construction Loans    
Derivative [Line Items]    
Undisbursed funds on existing lines of credit and commitments to originate loans 9,015 11,258
Undisbursed Lines of Credit - Mortgage Loans    
Derivative [Line Items]    
Undisbursed funds on existing lines of credit and commitments to originate loans 0 20
Undisbursed Lines of Credit - Commercial Business Loans    
Derivative [Line Items]    
Undisbursed funds on existing lines of credit and commitments to originate loans 646 821
Undisbursed Lines of Credit - Consumer Loans    
Derivative [Line Items]    
Undisbursed funds on existing lines of credit and commitments to originate loans 562 674
Commitments to Extend Credit, Loans to be Held for Investment    
Derivative [Line Items]    
Undisbursed funds on existing lines of credit and commitments to originate loans $ 19,119 $ 9,955