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Summary of Significant Accounting Policies (Freight Expenses) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
Accounting Policies [Abstract] |  |  |
Freight expense | $ 119,096 | $ 115,157 | $ 133,384

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- Definition Cost of freight-in, whether based on weight, negotiated freight rates and method of transportation (that is, rail, barge, truck, and so forth). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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