Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jul. 01, 2012	Jul. 03, 2011	Jan. 01, 2012
Income Taxes (Textual) [Abstract]
Uncertain tax positions	$ 5.1	$ 5.2	$ 4.7
Uncertain tax positions that would affect tax rate	2.6	2.8	2.3
Accrued interest related to uncertain tax positions	0.5	0.5	0.4
Interest expense	$ 0.1	$ 0.1
Tax rate	41.50%	38.10%
Effective income tax rate	44.00%	40.00%

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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This element represents the amount of interest expense accrued as of the date of the statement of financial position for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

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- Definition

This element represents interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

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