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Earnings Per Share (Details Textual) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Earnings Per Share (Textual) [Abstract]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 465,826 3,440,775 556,683 3,266,844