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Earnings (Loss) Per Share
 3 Months Ended
Mar. 31, 2013
Earnings Per Share [Abstract]  
Earnings (Loss) Per Share
Earnings (Loss) Per Share
Basic earnings (loss) per share is calculated by dividing the net income (loss) by the weighted average number of common shares outstanding during the period. Diluted earnings (loss) per share is calculated by dividing the earnings (loss) by the weighted average number of common shares and potentially dilutive securities outstanding during the period. Potentially dilutive common shares consist of incremental common shares issuable upon exercise of stock options, employee stock purchases, restricted stock and restricted stock units and shares issuable upon the conversion of convertible notes. The dilutive effect of outstanding shares is reflected in diluted earnings per share by application of the treasury stock method. This method includes consideration of the amounts to be paid by the employees, the amount of excess tax benefits that would be recognized in equity if the instrument was exercised and the amount of unrecognized stock-based compensation related to future services. No potential dilutive common shares are included in the computation of any diluted per share amount when a net loss is reported.
The following table sets forth the computation of basic and diluted loss per share:
 
 
Three Months Ended March 31,
 
 
2013
 
2012
Basic and diluted net loss per share:
 
(In thousands, except per share amounts)
Numerator:
 
 

 
 

Net Loss
 
$
(10,402
)
 
$
(27,890
)
Denominator:
 
 
 
 
Weighted-average shares outstanding
 
111,599

 
110,358

Basic and diluted net loss per share
 
$
(0.09
)
 
$
(0.25
)
For the three months ended March 31, 2013 and 2012, options to purchase approximately 12.9 million and 16.1 million shares, respectively, were excluded from the calculation because they were anti-dilutive after considering proceeds from exercise, taxes and related unrecognized stock-based compensation expense. For the three months ended March 31, 2013 and 2012, an additional 6.4 million and 5.4 million potentially dilutive shares, respectively, have been excluded from the weighted average dilutive shares because there were net losses for the periods.