Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 24, 2014	Sep. 25, 2013	Sep. 24, 2014	Sep. 25, 2013
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 4,115,000	$ 4,318,000	$ 11,464,000	$ 10,424,000
State job tax credits, current year's hiring activity			300,000
State job tax credits, prior year's hiring activity			500,000	800,000
Tax adjustment expense (benefit)			(500,000)
Deferred tax expense (benefit)				(300,000)
Valuation allowance recorded against certain state jobs tax credits				$ 500,000