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Acquisitions, Divestiture and Goodwill (Goodwill) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 01, 2017 | Dec. 30, 2017 | Dec. 31, 2016
Goodwill [Roll Forward] |  |  |
Beginning balance |  | $ 355,263 | $ 359,394
Segment allocation and acquisition adjustments |  |  | (2,171)
Foreign currency changes |  | 4,230 | (1,960)
Impairment charge |  | (359,493) |
Ending balance |  | 0 | 355,263
Americas |  |  |
Goodwill [Roll Forward] |  |  |
Impairment charge | $ 202,300 |  |
Europe |  |  |
Goodwill [Roll Forward] |  |  |
Impairment charge | 114,300 |  |
Asia |  |  |
Goodwill [Roll Forward] |  |  |
Impairment charge | $ 42,900 | (42,900) |
Operating segments | Americas |  |  |
Goodwill [Roll Forward] |  |  |
Beginning balance |  | 202,187 | 283,598
Segment allocation and acquisition adjustments |  |  | (81,166)
Foreign currency changes |  | 162 | (245)
Impairment charge |  | (202,349) |
Ending balance |  | 0 | 202,187
Operating segments | Europe |  |  |
Goodwill [Roll Forward] |  |  |
Beginning balance |  | 110,291 | 63,981
Segment allocation and acquisition adjustments |  |  | 48,046
Foreign currency changes |  | 3,983 | (1,736)
Impairment charge |  | (114,274) |
Ending balance |  | 0 | 110,291
Operating segments | Asia |  |  |
Goodwill [Roll Forward] |  |  |
Beginning balance |  | 42,785 | 11,815
Segment allocation and acquisition adjustments |  |  | 30,949
Foreign currency changes |  | 85 | 21
Impairment charge |  | (42,870) |
Ending balance |  | $ 0 | $ 42,785

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