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Net Income Per Share
 6 Months Ended
Jun. 30, 2013
Earnings Per Share [Abstract]  
Net Income Per Share
14)   Net Income Per Share

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

 

     Three Months Ended
June 30,		      Six Months Ended
June 30,		  
     2013      2012      2013      2012  

Numerator:

            

Net income

    $ 7,320       $ 18,572       $ 13,081       $ 41,340   
  

 

 

     

 

 

     

 

 

     

 

 

  

Denominator:

            

Shares used in net income per common share – basic

      53,054,000         52,679,000         52,914,000         52,591,000   

Effect of dilutive securities:

            

Stock options, restricted stock and employee stock purchase plan

      304,000         527,000         445,000         623,000   
  

 

 

     

 

 

     

 

 

     

 

 

  

Shares used in net income per common share – diluted

      53,358,000         53,206,000         53,359,000         53,214,000   
  

 

 

     

 

 

     

 

 

     

 

 

  

Net income per common share:

            

Basic

    $ 0.14       $ 0.35       $ 0.25       $ 0.79   

Diluted

    $ 0.14       $ 0.35       $ 0.25       $ 0.78   

Basic earnings per share (“EPS”) is computed by dividing income available to common stockholders by the weighted-average number of common shares outstanding during the period. The computation of diluted EPS is similar to the computation of basic EPS except that the denominator is increased to include the number of additional common shares that would have been outstanding (using the treasury stock method) if securities containing potentially dilutive common shares (stock options and restricted stock units) had been converted to such common shares, and if such assumed conversion is dilutive.

As of June 30, 2013, stock options and restricted stock units relating to an aggregate of approximately 1,083,000 shares were outstanding. For the three and six months ended June 30, 2013, the potential dilutive effect of approximately 102,000 and 100,000 weighted-average shares, respectively, of restricted stock units and stock options were excluded from the computation of diluted weighted-average shares outstanding as the shares would have an anti-dilutive effect on EPS.

As of June 30, 2012, stock options and restricted stock units relating to an aggregate of approximately 1,277,000 shares were outstanding. For the three and six months ended June 30, 2012, the potential dilutive effect of 479,000 and 288,000 weighted-average shares, respectively, of restricted stock units and stock options were excluded from the computation of diluted weighted-average shares outstanding as the shares would have an anti-dilutive effect on EPS.