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NET INCOME PER SHARE
 6 Months Ended
Jun. 27, 2014
Earnings Per Share [Abstract]  
NET INCOME PER SHARE
NET INCOME PER SHARE
Diluted common shares were calculated as follows (in thousands, except per share amounts):
 
Thirteen weeks ended
 
Twenty-six weeks ended
 
June 27, 2014

June 28, 2013
 
June 27, 2014
 
June 28, 2013
Net income
$
16,082

 
$
12,537

 
$
17,739

 
$
11,462

 
 
 
 
 
 
 
 
Weighted average number of common shares used in basic net income per common share
40,739

 
40,140

 
40,655

 
39,962

Dilutive effect of outstanding stock options and non-vested restricted stock
230

 
281

 
279

 
286

Weighted average number of common shares used in diluted net income per common share
40,969

 
40,421

 
40,934

 
40,248

   Net income per common share:
 
 
 
 
 
 
 
Basic
$
0.39

 
$
0.31

 
$
0.44

 
$
0.29

Diluted
$
0.39

 
$
0.31

 
$
0.43

 
$
0.28

 
 
 
 
 
 
 
 
Anti-dilutive shares
3

 
3

 
2

 
152


Basic net income per share is calculated by dividing net income by the weighted average number of common shares outstanding during the period. Diluted net income per share is calculated by dividing net income by the weighted average number of common shares and potential common shares outstanding during the period. Potential common shares include the dilutive effects of outstanding options, non-vested restricted stock, and performance share units, except where their inclusion would be anti-dilutive.
Anti-dilutive shares include unvested restricted stock, performance share units, and in-the-money options for which the sum of the assumed proceeds, including unrecognized compensation expense, exceeds the average stock price during the periods presented. Anti-dilutive shares associated with our stock options relate to those stock options with an exercise price higher than the average market value of our stock during the periods presented.