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Goodwill (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 30, 2017 | Dec. 31, 2016
Goodwill [Roll Forward] |  |
Goodwill at beginning of year | $ 1,241,807 | $ 1,249,016
Accumulated impairment losses | (15,914) | (15,914)
Goodwill at beginning of year | 1,225,893 | 1,233,102
Goodwill acquired during year | 1,880 | 829
Goodwill disposed of during year | (2,894) |
Foreign currency translation | 76,214 | (8,038)
Goodwill at end of year | 1,317,007 | 1,241,807
Accumulated impairment losses at end of year | (15,914) | (15,914)
Goodwill at end of year | 1,301,093 | 1,225,893
Feed Ingredients [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill at beginning of year | 813,621 | 812,797
Accumulated impairment losses | (15,914) | (15,914)
Goodwill at beginning of year | 797,707 | 796,883
Goodwill acquired during year | 1,880 | 827
Goodwill disposed of during year | (2,894) |
Foreign currency translation | 35,560 | (3)
Goodwill at end of year | 848,167 | 813,621
Accumulated impairment losses at end of year | (15,914) | (15,914)
Goodwill at end of year | 832,253 | 797,707
Food Ingredients [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill at beginning of year | 317,008 | 323,385
Accumulated impairment losses | 0 | 0
Goodwill at beginning of year | 317,008 | 323,385
Goodwill acquired during year | 0 | 0
Goodwill disposed of during year | 0 |
Foreign currency translation | 27,463 | (6,377)
Goodwill at end of year | 344,471 | 317,008
Accumulated impairment losses at end of year | 0 | 0
Goodwill at end of year | 344,471 | 317,008
Fuel [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill disposed of during year | 0 |
Fuel Ingredients [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill at beginning of year | 111,178 | 112,834
Accumulated impairment losses | 0 | 0
Goodwill at beginning of year | 111,178 | 112,834
Goodwill acquired during year | 0 | 2
Foreign currency translation | 13,191 | (1,658)
Goodwill at end of year | 124,369 | 111,178
Accumulated impairment losses at end of year | 0 | 0
Goodwill at end of year | $ 124,369 | $ 111,178

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