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Reportable Segment Information (Net Sales By Product Category) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Jan. 02, 2016 | Jan. 03, 2015
Revenue from External Customer [Line Items] |  |  |
Net sales | $ 2,203,489 | $ 2,304,419 | $ 2,222,695
Systems and storage |  |  |
Revenue from External Customer [Line Items] |  |  |
Net sales | 904,748 | 1,140,369 | 1,156,170
Seating |  |  |
Revenue from External Customer [Line Items] |  |  |
Net sales | 707,609 | 561,392 | 498,389
Other |  |  |
Revenue from External Customer [Line Items] |  |  |
Net sales | 91,528 | 76,043 | 84,490
Hearth Products |  |  |
Revenue from External Customer [Line Items] |  |  |
Net sales | $ 499,604 | $ 526,615 | $ 483,646

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + 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 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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