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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 25, 2012	Mar. 27, 2011
Income Taxes [Abstract]
Number of remaining Company-owned stores	6
Deferred tax asset valuation allowance	$ 0.9
Liability reduction in unrecognized tax benefits		0.5
Gross unrecognized tax benefits		0.3
Interest and penalties		0.2
Recognized income tax benefit		$ 0.2

The sum of the portions of deferred tax assets as of the balance sheet date for which, based on the weight of available evidence, it is more likely than not will not be realized through future reductions of tax-based income.

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