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Common and Common Equivalent Shares (Tables)
6 Months Ended
Jun. 30, 2018
Earnings Per Share [Abstract]  
Schedule of Calculation of Shares Used in Basic and Diluted Net Income Per Share

The calculation of shares used in the basic and diluted net income per common share calculation for the three and six months ended June 30, 2018 and 2017 is as follows (in thousands):

 

     Three Months Ended
June 30,
     Six Months Ended
June 30,
 
     2018      2017      2018      2017  

Weighted average number of common shares outstanding

     92,987        92,181        92,922        92,270  

Weighted average number of dilutive common share equivalents

     542        631        594        707  
  

 

 

    

 

 

    

 

 

    

 

 

 

Weighted average number of common and common equivalent shares outstanding

     93,529        92,812        93,516        92,977  
  

 

 

    

 

 

    

 

 

    

 

 

 

Antidilutive securities not included in the diluted net income per common share calculation

     392        8        197        5