Organization and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Computation of Net Income Per Share

The computation of earnings per share is as follows:

	Year ended December 31,
	2018		2017		2016
	(in thousands, except per share data)
Basic earnings per share:
Net income	$	1,211,242	$	558,929	$	186,678
Shares used in computation:
Weighted-average common shares outstanding	435,374		431,885		428,822
Basic earnings per share	$	2.78	$	1.29	$	0.44
Diluted earnings per share:
Net income	$	1,211,242	$	558,929	$	186,678
Shares used in computation:
Weighted-average common shares outstanding	435,374		431,885		428,822
Employee stock options	15,870		14,929		9,830
Weighted-average number of shares	451,244		446,814		438,652
Diluted earnings per share	$	2.68	$	1.25	$	0.43

Summary of Potential Common Shares Excluded from Diluted Calculation

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

	Year ended December 31,
	2018	2017	2016
	(in thousands)
Employee stock options	330	189	1,545