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Net Income Per Share (Tables)
3 Months Ended
Mar. 31, 2016
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Net Income Per Share

The following table sets forth the computation of basic and diluted net income per share:

 

     Three Months Ended March 31,  
     2016      2015  

Numerator:

     

Net income

   $ 17,563       $ 33,786   
  

 

 

    

 

 

 

Denominator:

     

Shares used in net income per common share – basic

     53,235,000         53,214,000   

Effect of dilutive securities:

     

Stock options, restricted stock and employee stock purchase plan

     328,000         315,000   
  

 

 

    

 

 

 

Shares used in net income per common share – diluted

     53,563,000         53,529,000   
  

 

 

    

 

 

 

Net income per common share:

     

Basic

   $ 0.33       $ 0.63   

Diluted

   $ 0.33       $ 0.63