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Goodwill (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Jan. 02, 2016
Goodwill [Roll Forward] |  |
Goodwill at beginning of year | $ 1,249,016 | $ 1,336,333
Accumulated impairment losses | (15,914) | (15,914)
Goodwill at beginning of year | 1,233,102 | 1,320,419
Goodwill acquired during year | 829 | 262
Foreign currency translation | (8,038) | (87,579)
Goodwill at end of year | 1,241,807 | 1,249,016
Accumulated impairment losses at end of year | (15,914) | (15,914)
Goodwill at end of year | 1,225,893 | 1,233,102
Feed Ingredients [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill at beginning of year | 812,797 | 863,508
Accumulated impairment losses | (15,914) | (15,914)
Goodwill at beginning of year | 796,883 | 847,594
Goodwill acquired during year | 827 | (259)
Foreign currency translation | (3) | (50,452)
Goodwill at end of year | 813,621 | 812,797
Accumulated impairment losses at end of year | (15,914) | (15,914)
Goodwill at end of year | 797,707 | 796,883
Food Ingredients [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill at beginning of year | 323,385 | 346,153
Accumulated impairment losses | 0 | 0
Goodwill at beginning of year | 323,385 | 346,153
Goodwill acquired during year | 0 | 0
Foreign currency translation | (6,377) | (22,768)
Goodwill at end of year | 317,008 | 323,385
Accumulated impairment losses at end of year | 0 | 0
Goodwill at end of year | 317,008 | 323,385
Fuel Ingredients [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill at beginning of year | 112,834 | 126,672
Accumulated impairment losses | 0 | 0
Goodwill at beginning of year | 112,834 | 126,672
Goodwill acquired during year | 2 | 521
Foreign currency translation | (1,658) | (14,359)
Goodwill at end of year | 111,178 | 112,834
Accumulated impairment losses at end of year | 0 | 0
Goodwill at end of year | $ 111,178 | $ 112,834

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