Net Income (Loss) per Share (Tables)

6 Months Ended

Jun. 30, 2012

Net Income (Loss) per Share

Computation of basic and diluted net income (loss) and the weighted-average number of shares used in computing basic and diluted net income (loss) per share

	Three Months Ended June 30,						Six Months Ended June 30,
(in thousands, except for per share amounts)	2012			2011			2012			2011
Numerator:
Net income (loss) — basic	$	(37,120	)	$	(25,045	)	$	47,474		$	(47,712	)
Add: interest and issuance costs related to convertible notes	—			—			3,002			—
Net income (loss) — diluted	(37,120		)	(25,045		)	50,476			(47,712		)
Denominator:
Weighted-average common shares outstanding	91,809			84,263			89,019			83,867
Less: unvested RSAs	(2,640		)	(2,452		)	(2,640		)	(2,452		)
Weighted-average common shares outstanding — basic	89,169			81,811			86,379			81,415
Effect of dilutive equity incentive plans and ESPP	—			—			1,997			—
Effect of dilutive convertible subordinated notes	—			—			6,668			—
Weighted-average common shares outstanding —diluted	89,169			81,811			95,044			81,415

Schedule of anti-dilutive shares

	Three Months Ended June 30,		Six Months Ended June 30,
(in thousands)	2012	2011	2012	2011
Shares issuable under Equity Incentive Plans and ESPP	6,348	5,472	3,801	5,616
Shares issuable upon the conversion of convertible debt	6,668	6,668	—	6,668
Total anti-dilutive securities	13,016	12,140	3,801	12,284