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Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2015
Earnings Per Share [Abstract]  
Schedule of Reconciliation of Numerator and Denominator for Basic and Diluted Earnings Per Share
Year ended December 31, 2015   2014     2013  
                   
Numerator:                        
Net income   $ 62,126     $ 38,628     $ 111,272  
Denominator:                        
Weighted average number of common shares outstanding – Basic     18,696,659       19,367,928       19,327,394  
Dilutive effect of options and restricted stock units outstanding under the Company's employee compensation plans     668,420       469,480       613,324  
Weighted average number of common shares outstanding – Diluted     19,365,079       19,837,408       19,940,718