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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2012	Sep. 29, 2011	Sep. 27, 2012	Sep. 29, 2011	Dec. 29, 2011
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 2.0	$ 2.3	$ 5.2	$ 3.7
Effective tax rates (as a percent)	38.50%	40.40%	39.10%	39.40%
Valuation allowance against deferred tax assets	$ 2.6		$ 2.6		$ 2.6

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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