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Commitments and Contingent Liabilities (Details Textual) - USD ($)
$ in Millions
Jun. 30, 2017
Dec. 31, 2016
Commitments to extend credit [Member]    
Loss Contingencies [Line Items]    
Amount of commitment $ 165.1 $ 160.5
Standby letters of credit [Member]    
Loss Contingencies [Line Items]    
Amount of commitment $ 9.4 $ 8.5