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Net Income Per Common Share
 9 Months Ended
Sep. 30, 2020
Earnings Per Share [Abstract]  
NET INCOME PER COMMON SHARE NET INCOME PER COMMON SHARE
Basic net income per common share is calculated by dividing net income by the weighted average number of common shares outstanding during the reporting period. The following table sets forth the computation of basic and diluted net income per common share:
 Three Months Ended September 30,Nine Months Ended September 30,
 2020201920202019
Net income$26,067 $23,515 $61,357 $86,506 
Net income per common share - basic $0.55 $0.50 $1.29 $1.85 
Net income per common share - diluted $0.55 $0.49 $1.29 $1.82 
Weighted average common shares outstanding - basic47,476 46,677 47,406 46,701 
Plus dilutive effect of potential common shares200 930 241 899 
Weighted average common shares outstanding - diluted47,676 47,607 47,647 47,600 
Share-based awards to purchase 84 and 79 shares of common stock were not included in the above calculation of diluted net income per common share for the three and nine months ended September 30, 2020, respectively, because the effect of these instruments was anti-dilutive. Share-based awards to purchase 32 and 55 shares of common stock were not included in the above calculation of diluted net income per common share for the three and nine months ended September 30, 2019, respectively, because the effect of these instruments was anti-dilutive.