Net loss per share (Tables)

6 Months Ended

Jun. 30, 2017

Net Income (Loss) Per Share

Schedule of calculation of net income (loss) per share

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands, except per share data)		2017	2016			2017	2016
Basic Net Income (Loss) Per Share
Basic net income (loss)	$	(12,484)	$	34,425	$	(199,567)	$	58,472
Weighted average common shares outstanding		205,141		187,682		200,200		187,433
Basic net income (loss) per share	$	(0.06)	$	0.18	$	(1.00)	$	0.31
Diluted Net Income (Loss) Per Share
Diluted net income (loss)	$	(12,484)	$	34,425	$	(199,567)	$	58,472
Weighted average common shares outstanding		205,141		187,682		200,200		187,433
Dilutive stock options and RSUs		—		5,333		—		5,387
Weighted average shares used to compute diluted net income (loss) per share		205,141		193,015		200,200		192,820
Diluted net income (loss) per share	$	(0.06)	$	0.18	$	(1.00)	$	0.30

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

	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2017	2016	2017	2016
Outstanding stock options and awards	12,085,346	2,790,121	12,085,346	2,744,246
Common shares issuable upon conversion of the 2018 Notes	149,603	7,245,244	149,603	7,245,244
Common shares issuable upon conversion of the 2020 Notes	368,939	7,241,284	368,939	7,241,284
Total potential common shares excluded from diluted net loss per share computation	12,603,888	17,276,649	12,603,888	17,230,774