Net income (loss) per share (Tables)

6 Months Ended

Jun. 30, 2020

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 below:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands, except per share data)		2020	2019			2020	2019
Basic Net Income (Loss) Per Share
Basic net income (loss) per share	$	290,298	$	105,318	$	(430,344)	$	207,630
Weighted average common shares outstanding		217,549		214,620		217,135		214,342
Basic net income (loss) per share	$	1.33	$	0.49	$	(1.98)	$	0.97
Diluted Net Income (Loss) Per Share
Diluted net income (loss)	$	290,298	$	105,318	$	(430,344)	$	207,630
Weighted average common shares outstanding		217,549		214,620		217,135		214,342
Dilutive stock options and awards		2,885		2,863		—		2,932
Weighted average shares used to compute diluted net income (loss) per share		220,434		217,483		217,135		217,274
Diluted net income (loss) per share	$	1.32	$	0.48	$	(1.98)	$	0.96

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

The potential common shares that were excluded from the diluted net income (loss) per share computation are as follows:

	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2020	2019	2020	2019
Outstanding stock options and awards	4,970,884	9,165,776	14,598,523	9,221,941
Common shares issuable upon conversion of the 2020 Notes	365,752	368,939	365,752	368,939
Total potential common shares excluded from diluted net income (loss) per share computation	5,336,636	9,534,715	14,964,275	9,590,880