Basic and Diluted Net Income Per Share - (Tables)

3 Months Ended

Mar. 31, 2015

Earnings Per Share, Basic and Diluted [Abstract]

Computation of Basic and Diluted Net Income Per Share

The computations of basic and diluted net income per share are as follows (in thousands, except per share amounts): 

	Three Months Ended
	March 31,
	2015		2014
Numerator:
Net income	$	4,147	$	18,275
Denominator:
Weighted average common shares - basic	76,205		74,754
Effect of dilutive securities:
Employee stock options	2,806		3,306
Employee stock purchase plan	95		4
Restricted stock units	125		—
Weighted average common shares - diluted	79,231		78,064
Net income per share:
Basic	$	0.05	$	0.24
Diluted	$	0.05	$	0.23
Potentially dilutive securities excluded from net income per share - diluted because their effect is anti-dilutive	43		658