Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2017

Earnings Per Share [Abstract]

Computation of Earnings Per Share

The computation of earnings per share is as follows:

	Three Months Ended
	March 31, 2017		March 31, 2016
	(in thousands, except per share data)
Basic earnings per share:
Net income	$	178,222	$	27,658
Shares used in computation:
Weighted-average common shares outstanding	430,600		428,117
Basic earnings per share	$	0.41	$	0.06
Diluted earnings per share:
Net income	$	178,222	$	27,658
Shares used in computation:
Weighted-average common shares outstanding	430,600		428,117
Employee stock options	14,858		9,876
Weighted-average number of shares	445,458		437,993
Diluted earnings per share	$	0.40	$	0.06

Summary of Potential Common Shares Excluded from Diluted Calculation

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

	Three Months Ended
	March 31, 2017	March 31, 2016
	(in thousands)
Employee stock options	237	1,337