Income Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2013	Sep. 23, 2012	Sep. 29, 2013	Sep. 23, 2012
Earnings Per Share [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,800,000	2,500,000	1,600,000	2,100,000
Net income	$ 5,171	$ 15,056	$ 16,429	$ 28,204
Basic income per share	$ 0.19	$ 0.55	$ 0.60	$ 1.04
Weighted average shares outstanding, basic	27,453,000	27,234,000	27,370,000	27,205,000
Diluted income per share	$ 0.19	$ 0.55	$ 0.60	$ 1.03
Weighted average dilutive stock options	83,000	87,000	144,000	108,000
Weighted average shares outstanding, diluted	27,536,000	27,321,000	27,514,000	27,313,000