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Reportable Segment Information (Business Segment Information) (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 USD ($) Segment | Jan. 02, 2016 USD ($) | Jan. 03, 2015 USD ($)
Segment Reporting [Abstract] |  |  |
Number of business segments | Segment | 2 |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | $ 2,203,489 | $ 2,304,419 | $ 2,222,695
Income (loss) before income taxes | 128,911 | 157,170 | 104,931
Depreciation and amortization expense | 68,947 | 57,564 | 56,722
Capital expenditures (including capitalized software) | 119,584 | 114,966 | 112,713
Identifiable assets | 1,330,234 | 1,263,925 | 1,239,334
Restructuring and impairment charges | 11,005 | 11,792 | 33,019
Office Furniture |  |  |
Segment Reporting Information [Line Items] |  |  |
Restructuring and impairment charges | 10,900 | 11,600 | 38,200
Hearth Products |  |  |
Segment Reporting Information [Line Items] |  |  |
Restructuring and impairment charges | 5,500 | 900 |
Operating |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating profit | 187,357 | 214,755 | 164,119
Operating | Office Furniture |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 1,703,885 | 1,777,804 | 1,739,049
Operating profit | 117,397 | 136,593 | 87,053
Depreciation and amortization expense | 45,088 | 42,415 | 45,891
Capital expenditures (including capitalized software) | 65,944 | 64,850 | 62,696
Identifiable assets | 749,145 | 739,915 | 724,293
Operating | Hearth Products |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 499,604 | 526,615 | 483,646
Operating profit | 69,960 | 78,162 | 77,066
Depreciation and amortization expense | 12,486 | 8,430 | 5,415
Capital expenditures (including capitalized software) | 11,217 | 11,078 | 6,342
Identifiable assets | 340,494 | 341,813 | 341,315
General corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Unallocated corporate expenses | (58,446) | (57,585) | (59,188)
Depreciation and amortization expense | 11,373 | 6,719 | 5,416
Capital expenditures (including capitalized software) | 42,423 | 39,038 | 43,675
Identifiable assets | $ 240,595 | $ 182,197 | $ 173,726

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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