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Segment and Geographic Information Unallocated Corporate Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Segment Reporting Information [Line Items]
Stock-based compensation	$ 40,122	$ 31,035	$ 24,542
Depreciation expense	70,700	70,500	78,800
Corporate
Segment Reporting Information [Line Items]
Stock-based compensation	25,751	18,474	13,411
Salary, bonus and fringe	33,026	30,838	23,446
Consulting, audit and professional services	15,418	13,431	8,666
IT related expenses	8,400	6,528	11,646
Depreciation expense	7,414	7,703	6,334
Acquisition related adjustments	11,644	6,285	1,752
Other general unallocated corporate expenses	9,527	8,816	8,721
Total unallocated corporate overhead costs	$ 111,180	$ 92,075	$ 73,976

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- Definition

Represents the sum total of audit, tax and related expenses.

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Amount of direct costs of the business combination or disposition including legal, accounting, and other costs incurred to consummate the business acquisition or disposition.

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Represents the amount of unallocated corporate expenses.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

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-Name Accounting Standards Codification
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-Paragraph 1
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
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The amount of expense in the period for communications and data processing expense.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Amount of general expenses not normally included in Other Operating Costs and Expenses.

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