NET INCOME (LOSS) PER SHARE (Tables)

6 Months Ended

Jun. 30, 2013

NET INCOME (LOSS) PER SHARE

Computations for 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)	2013			2012			2013			2012
Numerator:
Net income (loss) — basic	$	(36,429	)	$	(37,120	)	$	(73,789	)	$	47,474
Add: interest and issuance costs related to convertible notes	—			—			—			3,002
Net income (loss) — diluted	(36,429		)	(37,120		)	(73,789		)	50,476
Denominator:
Weighted-average common shares outstanding	100,316			91,809			99,677			89,019
Less: unvested RSAs	(2,713		)	(2,640		)	(2,713		)	(2,640		)
Weighted-average common shares outstanding — basic	97,603			89,169			96,964			86,379
Dilutive effect of equity incentive plans and ESPP	—			—			—			1,997
Dilutive effect of convertible subordinated notes	—			—			—			6,668
Weighted-average common shares outstanding and dilutive potential common shares - diluted	97,603			89,169			96,964			95,044

Schedule of anti-dilutive securities

	Three Months Ended June 30,		Six Months Ended June 30,
(in thousands)	2013	2012	2013	2012
Shares issuable under equity incentive plans and ESPP	3,848	6,348	4,519	3,801
Shares issuable upon the conversion of convertible subordinated notes	17,015	6,668	15,643	—
Total anti-dilutive securities	20,863	13,016	20,162	3,801