Earnings Per Share

9 Months Ended

Sep. 30, 2011

9. 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, 2011 and 2010 (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Basic weighted-average common shares outstanding		32,057		31,615		32,005		31,414
Effect of dilutive securities:
Options		33		0		0		0
Employee Stock Purchase Plan		258		0		0		0
Restricted Stock Units		22		0		0		0

Diluted weighted-average common and potential common shares outstanding		32,370		31,615		32,005		31,414

During the three and nine months ended September 30, 2011, weighted-average options, RSUs and unissued 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.

During three and nine months ended September 30, 2010, weighted-average options, RSUs, and unissued ESPP shares to acquire a total of 4,554,343 and 4,445,049 shares of common stock, respectively, were outstanding but not included in the computation of diluted earnings per share as their effect was anti-dilutive.