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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

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Gain (loss) after tax expense or benefit, not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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The cash outflow associated with the purchase of all investments (debt, security, other) during the period.

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