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Net income per share (Tables)

9 Months Ended

Sep. 30, 2019

Net income per share

Schedule of calculation of net income per share

Net income per share was calculated as follows for the periods indicated below:


		Three Months Ended						Nine Months Ended
		September 30,						September 30,
(in thousands, except per share data)			2019		2018				2019		2018
Basic Net Income Per Share
Basic net income		$	128,271		$	29,176		$	335,901		$	40,430
Weighted average common shares outstanding			215,199			212,627			214,628			212,172

Basic net income per share		$	0.60		$	0.14		$	1.57		$	0.19

Diluted Net Income Per Share
Diluted net income		$	128,271		$	29,176		$	335,901		$	40,430
Weighted average common shares outstanding			215,199			212,627			214,628			212,172

Dilutive stock options and awards			2,592			3,337			2,765			3,344

Weighted average shares used to compute diluted net income per share			217,791			215,964			217,393			215,516

Diluted net income per share		$	0.59		$	0.14		$	1.55		$	0.19

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				Nine Months Ended
		September 30,				September 30,
		2019		2018		2019		2018
Outstanding stock options and awards		8,893,596		9,055,004		9,457,441		7,254,774
Common shares issuable upon conversion of the 2018 Notes		—		148,741		—		148,741
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 income (loss) per share computation		9,262,535		9,572,684		9,826,380		7,772,454