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Acquisitions and Divestitures (Details) - USD ($) $ in Thousands |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2016 | Jan. 29, 2016 | Oct. 01, 2014 | Dec. 31, 2016 | Jan. 02, 2016 | Jan. 03, 2015
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill | $ 290,699 |  |  | $ 290,699 | $ 277,650 | $ 279,310
Goodwill increase associated with acquisition |  |  |  | 2,000 |  |
Office Furniture |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill | 107,643 |  |  | 107,643 | $ 94,594 | $ 97,552
Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Pre-tax charge related to sale of business | 23,000 |  |  |  |  |
Long term note receivable | $ 10,000 |  |  | $ 10,000 |  |
OFM |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Annual sales of company acquired |  | $ 30,000 |  |  |  |
Acquisition cost |  | 34,100 |  |  |  |
Intangible assets |  | 15,000 |  |  |  |
Goodwill |  | $ 14,000 |  |  |  |
OFM | Minimum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life |  | 3 years |  |  |  |
OFM | Maximum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life |  | 10 years |  |  |  |
Vermont Castings Group |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  |  | $ 17,000 |  |  |
Cash paid for acquisition |  |  | 62,200 |  |  |
Purchase price allocation on intangible assets, other than goodwill |  |  | $ 24,900 |  |  |
Vermont Castings Group | Minimum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life |  |  | 5 years |  |  |
Vermont Castings Group | Maximum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life |  |  | 15 years |  |  |

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