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Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Income Taxes (Textual) [Abstract]
Effective income tax rate	24.90%	30.30%
Net tax benefits related primarily to research tax credit and Subpart F look-through exception	$ 2.7
Net tax benefits		$ 1.1
Effective income tax rate reconciliation, excluding tax credits	30.00%	32.50%

- 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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