NET INCOME (LOSS) PER SHARE

9 Months Ended

Sep. 23, 2016

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



	Thirteen weeks ended				Thirty-nine weeks ended
	September 23, 2016		September 25, 2015		September 23, 2016			September 25, 2015
Net income (loss)	$	23,429	$	20,090	$	(33,338	)	$	43,079

Weighted average number of common shares used in basic net income (loss) per common share	41,762		41,296		41,651			41,189
Dilutive effect of non-vested restricted stock	294		324		—			357
Weighted average number of common shares used in diluted net income (loss) per common share	42,056		41,620		41,651			41,546
Net income (loss) per common share:
Basic	$	0.56	$	0.49	$	(0.80	)	$	1.05
Diluted	$	0.56	$	0.48	$	(0.80	)	$	1.04

Anti-dilutive shares	302		91		521			227

Basic net income (loss) per share is calculated by dividing net income (loss) by the weighted average number of common shares outstanding during the period. Diluted net income (loss) per share is calculated by dividing net income (loss) by the weighted average number of common shares and potential common shares outstanding during the period. Potential common shares include the dilutive effects of 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 primarily include non-vested restricted stock, and performance share units for which the sum of the assumed proceeds, including unrecognized compensation expense, exceeds the average stock price during the periods presented.