NET INCOME PER SHARE

12 Months Ended

Dec. 25, 2015

Diluted common shares were calculated as follows (in thousands, except per share amounts):



	Years ended
	2015		2014		2013
Net income	$	71,247	$	65,675	$	44,924

Weighted average number of common shares used in basic net income per common share	41,226		40,734		40,166
Dilutive effect of outstanding stock options and non-vested restricted stock	396		442		336
Weighted average number of common shares used in diluted net income per common share	41,622		41,176		40,502
Net income per common share:
Basic	$	1.73	$	1.61	$	1.12
Diluted	$	1.71	$	1.59	$	1.11

Anti-dilutive shares	89		58		78

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 stock options, vested and non-vested restricted stock, performance share units, and shares issued under the employee stock purchase plan, except where their inclusion would be anti-dilutive.

Anti-dilutive shares include non-vested restricted stock, performance share units, and outstanding stock 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.