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Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2014
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, 2014   2013     2012  
                   
Numerator:                        
Net income   $ 38,628     $ 111,272     $ 70,629  
Denominator:                        
Weighted average number of common shares outstanding – Basic     19,367,928       19,327,394       19,160,849  
Dilutive effect of options and restricted stock units outstanding under the Company's employee compensation plans     469,480       613,324       474,392  
Weighted average number of common shares outstanding – Diluted     19,837,408       19,940,718       19,635,241