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Share-based Payment Arrangements (Amounts Recognized In The Financial Statements With Respect To The Plans) (Details) (USD $)
In Thousands
3 Months Ended9 Months Ended
Sep. 24, 2011
Sep. 25, 2010
Sep. 24, 2011
Sep. 25, 2010
Share-based Payment Arrangements    
Total cost of the Plans during the period$ 1,310$ 1,199$ 3,783$ 3,567
Amount of related income tax benefit recognized during the period354285992906
Net cost of the Plans during the period$ 956$ 914$ 2,791$ 2,661