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Net Profit Per Share
 6 Months Ended
Jun. 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,
June 30,
 
Six Months Ended,
June 30,
 
2016
 
2015
 
2016
 
2015
Numerator:
 
 
 
 
 
 
 
Net income
$
50,148

 
$
31,350

 
$
90,694

 
$
67,527

Denominator:
 
 
 
 
 
 
 
Weighted-average common shares outstanding, basic
79,951

 
80,257

 
79,891

 
80,358

Dilutive effect of potential common stock
1,330

 
1,137

 
1,549

 
1,371

Total shares, diluted
81,281

 
81,394

 
81,440

 
81,729

 
 
 
 
 
 
 
 
Net income per share, basic
$
0.63

 
$
0.39

 
$
1.14

 
$
0.84

Net income per share, diluted
$
0.62

 
$
0.39

 
$
1.11

 
$
0.83



For the six months ended June 30, 2016 and 2015, the anti-dilutive effect from RSU, MSU and ESPP was not material.