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Income Taxes (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
Income Taxes (Narrative) (Details) (USD $)	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011
Income Tax Disclosure [Abstract]
Income tax provision	$ 9,920,000	$ 6,178,000	$ 30,418,000	$ 22,062,000
Provision for income taxes (in percentage)	29.40%	18.80%	30.20%	24.40%
Possible reduction in liabilities for uncertain tax positions	$ 1,900,000		$ 1,900,000

- 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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