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Goodwill and Other Intangible Assets (Goodwill) (Details) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 29, 2018 | Dec. 29, 2018 | Dec. 30, 2017
Goodwill [Roll Forward] |  |  |
Goodwill, gross beginning balance |  | $ 311,856,000 | $ 321,088,000
Accumulated impairment losses, beginning balance |  | (32,351,000) | (30,389,000)
Goodwill, net beginning balance |  | 279,505,000 | 290,699,000
Goodwill acquired during the year |  | 3,463,000 |
Impairment losses |  | (12,168,000) | (4,838,000)
Foreign currency translation adjustment |  | (12,000) | (44,000)
Goodwill, gross ending balance |  | 315,307,000 | 311,856,000
Accumulated impairment losses, ending balance |  | (44,519,000) | (32,351,000)
Goodwill, net ending balance |  | 270,788,000 | 279,505,000
Office Furniture |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, gross beginning balance |  | 128,657,000 | 137,889,000
Accumulated impairment losses, beginning balance |  | (32,208,000) | (30,246,000)
Goodwill, net beginning balance |  | 96,449,000 | 107,643,000
Goodwill acquired during the year |  | 0 |
Impairment losses | $ 0 | (12,168,000) | (4,838,000)
Foreign currency translation adjustment |  | (12,000) | (44,000)
Goodwill, gross ending balance |  | 128,645,000 | 128,657,000
Accumulated impairment losses, ending balance |  | (44,376,000) | (32,208,000)
Goodwill, net ending balance |  | 84,269,000 | 96,449,000
Hearth Products |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, gross beginning balance |  | 183,199,000 | 183,199,000
Accumulated impairment losses, beginning balance |  | (143,000) | (143,000)
Goodwill, net beginning balance |  | 183,056,000 | 183,056,000
Goodwill acquired during the year |  | 3,463,000 |
Impairment losses |  | 0 | 0
Foreign currency translation adjustment |  | 0 | 0
Goodwill, gross ending balance |  | 186,662,000 | 183,199,000
Accumulated impairment losses, ending balance |  | (143,000) | (143,000)
Goodwill, net ending balance |  | $ 186,519,000 | 183,056,000
Disposal Group, Not Discontinued Operations |  |  |
Goodwill [Roll Forward] |  |  |
Impairment losses |  |  | (6,312,000)
Disposal Group, Not Discontinued Operations | Office Furniture |  |  |
Goodwill [Roll Forward] |  |  |
Impairment losses |  |  | (6,312,000)
Disposal Group, Not Discontinued Operations | Hearth Products |  |  |
Goodwill [Roll Forward] |  |  |
Impairment losses |  |  | $ 0

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