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Net Income Per Share
12 Months Ended
Dec. 31, 2016
Earnings Per Share [Abstract]  
Net Income Per Share
Net Income Per Share

Basic net income per share is computed by dividing the net income for the period by the weighted average number of common shares outstanding during the period. Diluted net income per share is computed by dividing the net income for the period by the weighted average number of shares of common stock and potentially dilutive common stock outstanding during the period. Potentially dilutive common shares include common shares issuable upon exercise of stock options, vesting of restricted stock awards, and issuances of ESPP, which are reflected in diluted net income per share by application of the treasury stock method. Under the treasury stock method, the amount that the employee must pay for exercising stock options, the amount of stock-based compensation cost for future services that the Company has not yet recognized, and the estimated tax benefit that would be recorded in additional paid-in capital upon exercise are assumed to be used to repurchase shares.

Net income per share for the years ended December 31, 2016, 2015 and 2014 was as follows:
 
 
 
Year Ended December 31,
 
 
2016
 
2015
 
2014
 
 
(In thousands, except per share data)
Numerator:
 
 
 
 
 
 
Net income
 
$
75,851

 
$
48,584

 
$
8,788

Denominator:
 
 
 
 
 
 
Weighted average common shares - basic
 
32,758

 
33,161

 
35,771

Potentially dilutive common share equivalent
 
970

 
627

 
674

Weighted average common shares - dilutive
 
33,728

 
33,788

 
36,445

 
 
 
 
 
 
 
Basic net income per share
 
$
2.32

 
$
1.47

 
$
0.25

Diluted net income per share
 
$
2.25

 
$
1.44

 
$
0.24

 
 
 
 
 
 
 
Anti-dilutive employee stock-based awards, excluded
 
258

 
1,807

 
2,617