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Acquisitions and Divestitures Narrative (Details) - USD ($) $ in Thousands | Sep. 21, 2018 | Sep. 29, 2018 | Dec. 30, 2017
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill |  | $ 282,939 | $ 279,505
Small Hearth Products Company |  |  |
Business Acquisition [Line Items] |  |  |
Purchase price | $ 3,000 |  |
Goodwill |  | $ 3,400 |

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