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Business Acquisitions Celsis, Additional Information (Details) - Celsis Group Limited - USD ($) $ in Thousands		12 Months Ended
	Jul. 24, 2015	Dec. 26, 2015	Dec. 27, 2014
Business Acquisition [Line Items]
Purchase price	$ 214,500
Total purchase price allocation	10,300
Total purchase price allocation	212,236
Cash acquired in excess of payments to acquire business	$ 2,300
Transaction and integration costs		$ 8,800
Pro forma information, revenue of acquiree since acquisition date		11,100
Pro forma information, earnings or loss of acquiree since acquisition date		6,100
Pro forma adjustments, acquisitions		$ 600	$ 13,100

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Acquisition, Purchase Price

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Business Combination, Integration Related Costs and Transaction Costs

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Payments to Acquire Business, Net of Cash Acquired

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Pro Forma Adjustments, Acquisitions - pro forma adjustments for amortization of intangibles assets and depreciation of fixed assets acquired in a business combination

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
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- Definition

This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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Amount of liabilities assumed at the acquisition date.

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The cash inflow associated with the acquisition of a business when the cash held by the acquired business exceeds the cash payments to acquire the business.

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