Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Computation of Earnings Per Share

The computation of earnings per share is as follows:

	Three Months Ended
	March 31, 2018		March 31, 2017
	(in thousands, except per share data)
Basic earnings per share:
Net income	$	290,124	$	178,222
Shares used in computation:
Weighted-average common shares outstanding	434,174		430,600
Basic earnings per share	$	0.67	$	0.41
Diluted earnings per share:
Net income	$	290,124	$	178,222
Shares used in computation:
Weighted-average common shares outstanding	434,174		430,600
Employee stock options	16,185		14,858
Weighted-average number of shares	450,359		445,458
Diluted earnings per share	$	0.64	$	0.40