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Common and Common Equivalent Shares (Tables)
3 Months Ended
Mar. 31, 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 months ended March 31, 2018 and 2017 is as follows (in thousands):

 

     Three Months Ended
March 31,
 
     2018      2017  

Weighted average number of common shares outstanding

     92,859        92,360  

Weighted average number of dilutive common share equivalents

     646        783  
  

 

 

    

 

 

 

Weighted average number of common and common equivalent shares outstanding

     93,505        93,143  
  

 

 

    

 

 

 

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

     1        3