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Earnings Per Common Share (Tables)
9 Months Ended
Sep. 30, 2018
Earnings Per Share [Abstract]  
Diluted weighted average number of common shares outstanding
In accordance with the treasury stock method, the Company has included the following common equivalent shares in the calculation of diluted weighted average number of common shares outstanding for the three and nine month periods ended September 30, relating to outstanding stock options and restricted stock units:
 
2018
 
2017
Three months ended
557,304

 
690,096

Nine months ended
581,299

 
682,205