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Acquisitions, Investments and Dispositions - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 25, 2011
Dec. 26, 2010
Dec. 27, 2009
Business Acquisition [Line Items]      
Payments for acquisitions, net of cash acquired $ 23,020 $ 15,164 $ 9,581
Payments for investments 19,406 10,984 9,674
Gain on sale of discontinued operations, net of tax   $ 21,195