Net income (loss) per share

9 Months Ended

Sep. 30, 2018

Net income (loss) per share

Net income (loss) per share

15.    Net income (loss) per share

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

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in thousands, except per share data)		2018	2017			2018	2017
Basic Net Income (Loss) Per Share
Basic net income (loss)	$	29,176	$	36,054	$	40,430	$	(163,513)
Weighted average common shares outstanding		212,627		206,796		212,172		202,399
Basic net income (loss) per share	$	0.14	$	0.17	$	0.19	$	(0.81)
Diluted Net Income (Loss) Per Share
Diluted net income (loss)	$	29,176	$	36,054	$	40,430	$	(163,513)
Weighted average common shares outstanding		212,627		206,796		212,172		202,399
Dilutive stock options and RSUs		3,337		5,814		3,344		—
Weighted average shares used to compute diluted net income (loss) per share		215,964		212,610		215,516		202,399
Diluted net income (loss) per share	$	0.14	$	0.17	$	0.19	$	(0.81)

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

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2018	2017	2018	2017
Outstanding stock options and awards	9,055,004	2,399,468	7,254,774	12,654,718
Common shares issuable upon conversion of the 2018 Notes	148,741	149,527	148,741	149,527
Common shares issuable upon conversion of the 2020 Notes	368,939	368,939	368,939	368,939
Total potential common shares excluded from diluted net loss per share computation	9,572,684	2,917,934	7,772,454	13,173,184