Net loss per share (Tables)

9 Months Ended

Sep. 30, 2016

Net income (loss) per share

Schedule of calculation of net income (loss) per share

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in thousands, except per share data)		2016	2015			2016	2015
Basic Net Income (Loss) Per Share
Basic net income (loss)	$	36,877	$	(39,582)	$	95,349	$	(48,645)
Weighted average common shares outstanding		188,029		181,387		187,632		177,378
Basic net income (loss) per share	$	0.20	$	(0.22)	$	0.51	$	(0.27)
Diluted Net Income (Loss) Per Share
Diluted net income (loss)	$	36,877	$	(39,582)	$	95,349	$	(48,645)
Weighted average common shares outstanding		188,029		181,387		187,632		177,378
Dilutive stock options and RSU’s		6,236		—		6,122		—
Weighted average shares used to compute diluted net income (loss) per share		194,265		181,387		193,754		177,378
Diluted net income (loss) per share	$	0.19	$	(0.22)	$	0.49	$	(0.27)

Schedule of antidilutive securities excluded from the computation of earnings per share

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2016	2015	2016	2015
Outstanding stock options and awards	3,119,097	12,520,799	2,947,152	12,520,799
Common shares issuable upon conversion of the 4.75% Convertible Senior Notes due 2015	—	632	—	632
Common shares issuable upon conversion of the 0.375% Notes due 2018	7,245,206	7,245,263	7,245,206	7,245,263
Common shares issuable upon conversion of the 1.25% Notes due 2020	7,241,284	7,245,225	7,241,284	7,245,225
Total potential common shares excluded from diluted net loss per share computation	17,605,587	27,011,919	17,433,642	27,011,919