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Net Income Per Share Available to Common Stock (Tables)
3 Months Ended
Mar. 31, 2015
Earnings Per Share [Abstract]  
Schedule of Basic and Diluted Net Income Per Share Available to Common Stock
The following table sets forth the computation of our basic and diluted net income per share available to common stock (in thousands, except per share amounts):
 
Three Months Ended 
 March 31,
 
2015
 
2014
Numerator:
 
 
 
Basic:
 
 
 
Net income
$
24,492

 
$
12,329

Less: undistributed earnings allocated to participating securities
(460
)
 
(5,967
)
Net income available to common stockholders, basic
$
24,032

 
$
6,362

Diluted:
 
 
 
Net income attributable to common stockholders, basic
$
24,032

 
$
6,362

Add: undistributed earnings allocated to participating securities
39

 
454

Net income attributable to common stockholders, diluted
$
24,071

 
$
6,816

Denominator:
 
 
 
Basic:
 
 
 
Weighted-average shares used in computing net income per share available to common stockholders, basic
64,635

 
29,124

Diluted:
 
 
 
Weighted-average shares used in computing net income per share available to common stockholders, basic
64,635

 
29,124

Add weighted-average effect of dilutive securities:
 
 
 
Stock options, RSUs and RSAs
5,928

 
4,692

Employee stock purchase plan
159

 

Weighted-average shares used in computing net income per share available to common stockholders, diluted
70,722

 
33,816

Net income per share attributable to common stockholders:
 
 
 
Basic
$
0.37

 
$
0.22

Diluted
$
0.34

 
$
0.20

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share
The following outstanding shares of common stock equivalents were excluded from the computation of diluted net income per share available to common stockholders for the periods presented because including them would have been anti-dilutive (in thousands):
 
Three Months Ended March 31,
 
2015
 
2014
Stock options and RSUs to purchase common stock
1,906

 
1,959