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Supplemental Balance Sheet Information Property, Plant and Equipment (Details) - USD ($) $ in Thousands | Dec. 26, 2015 | Dec. 27, 2014
--- | --- | ---
Other Assets, Current [Line Items] |  |
Gross property, plant and equipment | $ 1,322,772 | $ 1,331,780
Less accumulated depreciation | (644,813) | (654,983)
Property, plant and equipment, net | 677,959 | 676,797
Land |  |
Other Assets, Current [Line Items] |  |
Gross property, plant and equipment | 39,846 | 40,314
Buildings |  |
Other Assets, Current [Line Items] |  |
Gross property, plant and equipment | 713,841 | 682,495
Machinery and equipment |  |
Other Assets, Current [Line Items] |  |
Gross property, plant and equipment | 362,695 | 384,713
Leasehold improvements |  |
Other Assets, Current [Line Items] |  |
Gross property, plant and equipment | 41,477 | 37,270
Furniture and fixtures |  |
Other Assets, Current [Line Items] |  |
Gross property, plant and equipment | 21,783 | 22,577
Vehicles |  |
Other Assets, Current [Line Items] |  |
Gross property, plant and equipment | 3,819 | 3,967
Computer hardware and software |  |
Other Assets, Current [Line Items] |  |
Gross property, plant and equipment | 113,466 | 119,474
Construction in progress |  |
Other Assets, Current [Line Items] |  |
Gross property, plant and equipment | $ 25,845 | $ 40,970

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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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