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Net Income Per Share (Tables)
3 Months Ended
Mar. 31, 2018
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,  
     2018      2017  

Numerator:

     

Net income

   $ 105,121      $ 65,060  
  

 

 

    

 

 

 

Denominator:

     

Shares used in net income per common share — basic

     54,423,000        53,769,000  

Effect of dilutive securities:

     

Restricted stock units, stock appreciation rights and shares issued under employee stock purchase plan

     863,000        1,189,000  
  

 

 

    

 

 

 

Shares used in net income per common share — diluted

     55,286,000        54,958,000  
  

 

 

    

 

 

 

Net income per common share:

     

Basic

   $ 1.93      $ 1.21  

Diluted

   $ 1.90      $ 1.18