Net loss per share (Tables)

6 Months Ended

Jun. 30, 2016

Net income (loss) per share

Schedule of calculation of net income (loss) per share

Net income (loss) per share was calculated as follows for the periods indicated:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands, except per share data)		2016	2015			2016	2015
Basic Net Income (Loss) Per Share
Basic net income (loss)	$	34,425	$	9,294	$	58,472	$	(9,063)
Weighted average common shares outstanding		187,682		178,676		187,433		175,373
Basic net income (loss) per share	$	0.18	$	0.05	$	0.31	$	(0.05)
Diluted Net Income (Loss) Per Share
Diluted net income (loss)	$	34,425	$	9,294	$	58,472	$	(9,063)
Weighted average common shares outstanding		187,682		178,676		187,433		175,373
Dilutive stock options and RSU’s		5,333		7,817		5,387		—
Weighted average shares used to compute diluted net income (loss) per share		193,015		186,493		192,820		175,373
Diluted net income (loss) per share	$	0.18	$	0.05	$	0.30	$	(0.05)

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

The following potential common shares were excluded from the calculations as their effect would be anti-dilutive:

	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2016	2015	2016	2015
Outstanding stock options and awards	2,790,121	137,012	2,744,246	13,255,051
Common shares issuable upon conversion of the 4.75% Convertible Senior Notes due 2015	—	4,990,916	—	4,990,916
Common shares issuable upon conversion of the 2018 Notes	7,245,244	7,245,263	7,245,244	7,245,263
Common shares issuable upon conversion of the 2020 Notes	7,241,284	7,245,263	7,241,284	7,245,263
Total potential common shares excluded from diluted net loss per share computation	17,276,649	19,618,454	17,230,774	32,736,493