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Earnings Per Share
 9 Months Ended
Sep. 30, 2012
Earnings Per Share [Abstract]  
Earnings Per Share

8. Earnings Per Share

Basic earnings per share (“EPS”) excludes dilution and is computed by dividing net income (loss) attributable to common stockholders by the weighted-average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock using the treasury stock method. Potentially dilutive securities (consisting of options and restricted stock units (“RSUs”) and employee stock purchase plan (“ESPP”) withholdings using the treasury stock method) are excluded from the diluted EPS computation in loss periods and when the applicable exercise price is greater than the market price on the period end date as their effect would be anti-dilutive.

The following table sets forth the computation of diluted weighted-average common and potential common shares outstanding for the three and nine months ended September 30, 2012 and 2011 (in thousands):

 

                                 
    Three Months Ended
September 30,		     Nine Months Ended
September 30,		  
    2012     2011     2012     2011  

Basic weighted-average common shares outstanding

     33,074       32,057       32,683       32,005  

Effect of dilutive securities:

                                

Options

     —         33       —         —    

Employee Stock Purchase Plan

     —         258       —         —    

Restricted Stock Units

     —         22       —         —    
   

 

 

    

 

 

    

 

 

    

 

 

  

Diluted weighted-average common and potential common shares outstanding

     33,074       32,370       32,683       32,005  
   

 

 

    

 

 

    

 

 

    

 

 

  

During the three and nine months ended September 30, 2012, weighted-average options, RSUs, and ESPP shares to acquire a total of 6,068,910 and 6,164,954 shares of common stock, respectively, were outstanding but not included in the computation of diluted earnings per share as their effect was anti-dilutive.

During the three and nine months ended September 30, 2011, weighted-average options, RSUs and ESPP shares to acquire a total of 5,718,527 and 4,657,850 shares of common stock, respectively, were outstanding but not included in the computation of diluted earnings per share as their effect was anti-dilutive.