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Net Profit Per Share
 9 Months Ended
Sep. 30, 2016
Net Profit Per Share
Net Income Per Share

Basic net income per share is computed using the weighted average number of shares of common stock outstanding during the period. Diluted net income per share is computed using the weighted average number of shares of common stock, adjusted for any dilutive effect of potential common stock. Potential common stock, computed using the treasury stock method, includes RSU, MSU, stock options and ESPP.

The following table sets forth the computation of basic and diluted net income per share attributable to common stock (in thousands, except per share amounts): 
 
Three Months Ended,
September 30,
 
Nine Months Ended,
September 30,
 
2016
 
2015
 
2016
 
2015
Numerator:
 
 
 
 
 
 
 
Net income
$
51,367

 
$
27,616

 
$
142,061

 
$
95,143

Denominator:
 
 
 
 
 
 
 
Weighted-average common shares outstanding, basic
79,977

 
79,808

 
79,920

 
80,173

Dilutive effect of potential common stock
1,489

 
1,284

 
1,603

 
1,403

Total shares, diluted
81,466

 
81,092

 
81,523

 
81,576

 
 
 
 
 
 
 
 
Net income per share, basic
$
0.64

 
$
0.35

 
$
1.78

 
$
1.19

Net income per share, diluted
$
0.63

 
$
0.34

 
$
1.74

 
$
1.17



For the nine months ended September 30, 2016 and 2015, the anti-dilutive effect from RSU, MSU, stock options and ESPP was not material.