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Net Income Per Share
 9 Months Ended
Sep. 30, 2012
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 outstanding stock options and unvested restricted stock awards, 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 three and nine months ended September 30, 2012, and October 2, 2011, are as follows (in thousands, except per share data):
 
 
Three Months Ended
 
Nine Months Ended
 
September 30,
2012
 
October 2,
2011
 
September 30,
2012
 
October 2,
2011
Net income
$
23,791

 
$
26,747

 
$
70,460

 
$
68,533

Weighted average shares outstanding:
 
 
 
 
 
 
 
Basic
38,162

 
37,483

 
37,978

 
36,967

Dilutive potential common shares
640

 
597

 
704

 
845

Total diluted
38,802

 
38,080

 
38,682

 
37,812

 
 
 
 
 
 
 
 
Basic net income per share
$
0.62

 
$
0.71

 
$
1.86

 
$
1.85

Diluted net income per share
$
0.61

 
$
0.70

 
$
1.82

 
$
1.81



Weighted average stock options and unvested restricted stock awards to purchase 2.6 million shares and 1.9 million shares of the Company’s stock for the three months ended September 30, 2012, and October 2, 2011, respectively, and 2.7 million and 1.9 million shares for the nine months ended September 30, 2012, and October 2, 2011, respectively, were excluded from the computation of diluted net income per share because their effect would have been anti-dilutive.