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Goodwill (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2017 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |
Goodwill | $ 1,314,180 | $ 1,241,807
Accumulated impairment losses | (15,914) | (15,914)
Goodwill | 1,298,266 | 1,225,893
Goodwill acquired during year | 1,880 |
Foreign currency translation | 70,493 |
Feed Ingredients [Member] |  |
Segment Reporting Information [Line Items] |  |
Goodwill | 849,809 | 813,621
Accumulated impairment losses | (15,914) | (15,914)
Goodwill | 833,895 | 797,707
Goodwill acquired during year | 1,880 |
Foreign currency translation | 34,308 |
Fuel Ingredients [Member] |  |
Segment Reporting Information [Line Items] |  |
Goodwill | 123,277 | 111,178
Accumulated impairment losses | 0 | 0
Goodwill | 123,277 | 111,178
Goodwill acquired during year | 0 |
Foreign currency translation | 12,099 |
Food Ingredients [Member] |  |
Segment Reporting Information [Line Items] |  |
Goodwill | 341,094 | 317,008
Accumulated impairment losses | 0 | 0
Goodwill | 341,094 | $ 317,008
Goodwill acquired during year | 0 |
Foreign currency translation | $ 24,086 |

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