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Earnings Per Common Share
9 Months Ended
Sep. 30, 2019
Earnings Per Share [Abstract]  
Earnings Per Common Share
Note 14—Earnings Per Common Share

Basic and diluted earnings per common share are computed by dividing net income by the weighted-average number of basic and diluted common shares outstanding, respectively. The weighted-average number of diluted common shares includes the impact of dilutive securities, including outstanding stock options and unvested restricted stock and restricted stock units. The table below reconciles the weighted-average basic and diluted common shares outstanding:
Three Months Ended September 30,Nine Months Ended September 30,
2019201820192018
(in thousands) 
Weighted average number of common shares outstanding - basic74,387  74,019  74,347  73,972  
Effect of dilutive securities 1
120  560  268  626  
Weighted average number of common shares outstanding - diluted74,507  74,579  74,615  74,598  
1.Certain outstanding equity awards are anti-dilutive and were therefore excluded from the calculation of the weighted average number of diluted common shares outstanding.

Anti-dilutive outstanding equity awards under share based compensation plans were as follows:
Three Months Ended September 30,Nine Months Ended September 30,
2019201820192018
(in thousands) 
Anti-dilutive 2,028  760  1,512  770