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Goodwill and Other Intangible Assets - Narrative (Details) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2018 USD ($) | Dec. 30, 2017 USD ($)
Goodwill [Line Items] |  |
Goodwill | $ 279,482 | $ 279,505
Office Furniture |  |
Goodwill [Line Items] |  |
Goodwill | 96,426 | $ 96,449
Office Furniture | One Reporting Unit |  |
Goodwill [Line Items] |  |
Increase (decrease) in fair value for 100 basis point increase in discount rate | 4,200 |
Increase (decrease) in fair value for 100 basis point decrease in long-term growth rate | (2,000) |
Goodwill | $ 19,600 |
Discount Rate | Office Furniture | One Reporting Unit |  |
Goodwill [Line Items] |  |
Goodwill impairment test measurement input | 0.130 |
Near Term Growth Rate | Office Furniture | Minimum | One Reporting Unit |  |
Goodwill [Line Items] |  |
Goodwill impairment test measurement input | 0.07 |
Near Term Growth Rate | Office Furniture | Maximum | One Reporting Unit |  |
Goodwill [Line Items] |  |
Goodwill impairment test measurement input | 0.09 |
Long-term Revenue Growth Rate | Office Furniture | One Reporting Unit |  |
Goodwill [Line Items] |  |
Goodwill impairment test measurement input | 0.03 |

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