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Acquisitions and Dispositions - Dispositions Narrative (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jun. 21, 2017 | Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Net loss |  | $ (20,049) | $ (4,153) |
Gain on sale of business |  | $ 0 | 1,491 | $ 0
Mueller-Xingrong [Member] |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Equity method investment, ownership percentage | 50.50% |  |  |
Net sales of equity method investment |  |  | 67,300 | 121,500
Net loss |  |  | (9) | $ 62
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Mueller-Xingrong [Member] |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Proceeds from sale of interest | $ 18,300 |  |  |
Assets | 56,800 |  |  |
Carrying value of the liabilities disposed | 36,200 |  |  |
Cumulative translation loss | $ 3,800 |  |  |
Gain on sale of business |  |  | $ 1,500 |

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