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Earnings Per Share (Details Textual) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Earnings Per Share (Textual)        
Shares excluded from calculations of dilutive net income per share 820,312 820,312 820,312 820,312