Net Income Per Share (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Schedule of Computation of Net Income Per Share

The following table shows the computation of net income per share for each period:

	Three Months Ended
	March 31,
	2018		2017
	(in thousands)
Numerator:
Net income	$	17,459	$	4,388
Denominator:
Weighted-average shares used to compute basic net income per    share		114,882		112,867
Dilutive effect of employee stock options		12,851		8,322
Weighted-average shares used to compute diluted net income    per share		127,733		121,189
Net income per share attributable to common stockholders
Basic	$	0.15	$	0.04
Diluted	$	0.14	$	0.04

Securities Outstanding that could Potentially Dilute Per Share Data

The following table presents information on securities outstanding as of the end of each period that could potentially dilute the per share data:

	March 31,
	2018		2017
	(in thousands)
Stock options outstanding		23,117		20,880