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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Statement of Financial Position [Abstract]    
Amorization cost for investment securities available for sale $ 120,942,615 $ 118,422,116
Common Stock, no par value (in dollars per share)
Common Stock, shares authorized 12,000,000 12,000,000
Common Stock, shares issued 5,197,535 5,157,996
Common Stock, shares outstanding 4,956,139 4,916,600
Treasury stock, shares 241,396 241,396