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Share-Based Payment Arrangements (Amounts Recognized In The Financial Statements With Respect To The Plans) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 25, 2010	Dec. 26, 2009
Share-Based Payment Arrangements [Abstract]
Total cost of the Plans during the period	$ 5,012	$ 4,769	$ 4,968
Amount of related income tax benefit recognized during the period	983	1,194	1,163
Net cost of the Plans during the period	$ 4,029	$ 3,575	$ 3,805

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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