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Income Taxes (Details) (USD $)	3 Months Ended
Income Taxes (Details) (USD $)	Mar. 31, 2012	Apr. 02, 2011
Income Taxes
Income tax expense	$ 2,797,000	$ 7,674,000
Income tax rate (as a percent)	16.30%	134.30%
Gross unrecognized tax benefits which would affect the effective tax rate if recognized	11,300,000
Reductions for tax positions as a result of a lapse of the applicable statute of limitations	$ 3,500,000

- 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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