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Earnings Per Share (Weighted Average Shares Oustanding Used in Calculating Basic and Diluted Net Income Per Share) (Details) - shares
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Earnings Per Share [Abstract]    
Basic weighted-average common shares outstanding 27,916,652 27,675,938
Effect of dilutive shares 663,545 479,835
Diluted weighted-average common shares outstanding 28,580,197 28,155,773