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Goodwill and Other Intangible Assets (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 26, 2013	Mar. 27, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 3.6	$ 3.4

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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