Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

Computation of Earnings Per Share

The computation of earnings per share is as follows:

	Three Months Ended				Six Months Ended
	June 30, 2020		June 30, 2019		June 30, 2020		June 30, 2019
	(in thousands, except per share data)
Basic earnings per share:
Net income	$	720,196	$	270,650	$	1,429,263	$	614,702
Shares used in computation:
Weighted-average common shares outstanding	440,569		437,587		439,961		437,271
Basic earnings per share	$	1.63	$	0.62	$	3.25	$	1.41
Diluted earnings per share:
Net income	$	720,196	$	270,650	$	1,429,263	$	614,702
Shares used in computation:
Weighted-average common shares outstanding	440,569		437,587		439,961		437,271
Employee stock options	13,376		14,608		13,259		14,792
Weighted-average number of shares	453,945		452,195		453,220		452,063
Diluted earnings per share	$	1.59	$	0.60	$	3.15	$	1.36

Summary of Potential Common Shares Excluded from the Diluted Calculation

The following table summarizes the potential common shares excluded from the diluted calculation:

	Three Months Ended		Six Months Ended
	June 30, 2020	June 30, 2019	June 30, 2020	June 30, 2019
	(in thousands)
Employee stock options	39	750	777	701