Goodwill (Details) $ in Thousands	9 Months Ended
Sep. 29, 2018 USD ($)
Goodwill [Roll Forward]
Goodwill	$ 1,317,007
Accumulated impairment losses	(15,914)
Goodwill	1,301,093
Goodwill acquired during year	19,629
Goodwill disposed of during year	(61,459)
Goodwill impaired during year	(461)
Foreign currency translation	(25,257)
Goodwill	1,249,920
Accumulated impairment losses	(16,375)
Goodwill	1,233,545
Feed Ingredients
Goodwill [Roll Forward]
Goodwill	848,167
Accumulated impairment losses	(15,914)
Goodwill	832,253
Goodwill acquired during year	19,629
Goodwill disposed of during year	(61,088)
Goodwill impaired during year	0
Foreign currency translation	(13,185)
Goodwill	793,523
Accumulated impairment losses	(15,914)
Goodwill	777,609
Fuel Ingredients
Goodwill [Roll Forward]
Goodwill	124,369
Accumulated impairment losses	0
Goodwill	124,369
Goodwill acquired during year	0
Goodwill disposed of during year	0
Goodwill impaired during year	0
Foreign currency translation	(4,286)
Goodwill	120,083
Accumulated impairment losses	0
Goodwill	120,083
Food Ingredients
Goodwill [Roll Forward]
Goodwill	344,471
Accumulated impairment losses	0
Goodwill	344,471
Goodwill acquired during year	0
Goodwill disposed of during year	(371)
Goodwill impaired during year	(461)
Foreign currency translation	(7,786)
Goodwill	336,314
Accumulated impairment losses	(461)
Goodwill	$ 335,853

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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