Goodwill And Other Intangible Assets (Schedule Of Estimated Annual Amortization Expense) (Details) (USD $) In Thousands	3 Months Ended	9 Months Ended
Sep. 25, 2011	Sep. 26, 2010	Sep. 25, 2011	Sep. 26, 2010
Goodwill And Other Intangible Assets [Abstract]
2011			$ 44,700
2012			44,500
2013			43,700
2014			39,400
2015			33,500
Amortization expense of intangible assets	$ 11,100	$ 10,400	$ 33,196	$ 31,789

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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