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Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Schedule of Reconciliation of Numerator and Denominator for Basic and Diluted Earnings Per Share

Set forth below is a reconciliation of the numerator and denominator for basic and diluted earnings per share calculations for the periods indicated:

 

Year ended December 31,  2017   2016   2015 
             
Numerator:               
Net income  $52,142   $87,472   $62,126 
Denominator:               
Weighted average number of common shares outstanding – Basic   17,725,494    18,931,415    18,696,659 
Dilutive effect of options and restricted stock units outstanding under the Company’s employee compensation plans   213,596    118,100    668,420 
Weighted average number of common shares outstanding – Diluted   17,939,090    19,049,515    19,365,079