Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Computation of Earnings Per Share

The computation of earnings per share is as follows:

	Three Months Ended				Nine Months Ended
	September 30, 2018		September 30, 2017		September 30, 2018		September 30, 2017
	(in thousands, except per share data)
Basic earnings per share:
Net income	$	402,835	$	129,590	$	1,077,308	$	373,412
Shares used in computation:
Weighted-average common shares outstanding	435,809		432,404		435,033		431,473
Basic earnings per share	$	0.92	$	0.30	$	2.48	$	0.87
Diluted earnings per share:
Net income	$	402,835	$	129,590	$	1,077,308	$	373,412
Shares used in computation:
Weighted-average common shares outstanding	435,809		432,404		435,033		431,473
Employee stock options	16,110		14,958		16,250		14,894
Weighted-average number of shares	451,919		447,362		451,283		446,367
Diluted earnings per share	$	0.89	$	0.29	$	2.39	$	0.84