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Goodwill (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Apr. 01, 2017 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |
Goodwill | $ 1,249,185 | $ 1,241,807
Accumulated impairment losses | (15,914) | (15,914)
Goodwill | 1,233,271 | 1,225,893
Goodwill acquired during year | 0 |
Foreign currency translation | 7,378 |
Feed Ingredients [Member] |  |
Segment Reporting Information [Line Items] |  |
Goodwill | 817,316 | 813,621
Accumulated impairment losses | (15,914) | (15,914)
Goodwill | 801,402 | 797,707
Goodwill acquired during year | 0 |
Foreign currency translation | 3,695 |
Fuel Ingredients [Member] |  |
Segment Reporting Information [Line Items] |  |
Goodwill | 112,437 | 111,178
Accumulated impairment losses | 0 | 0
Goodwill | 112,437 | 111,178
Goodwill acquired during year | 0 |
Foreign currency translation | 1,259 |
Food Ingredients [Member] |  |
Segment Reporting Information [Line Items] |  |
Goodwill | 319,432 | 317,008
Accumulated impairment losses | 0 | 0
Goodwill | 319,432 | $ 317,008
Goodwill acquired during year | 0 |
Foreign currency translation | $ 2,424 |

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