Goodwill (Details) $ in Thousands	3 Months Ended
Mar. 30, 2019 USD ($)
Goodwill [Roll Forward]
Goodwill	$ 1,245,534
Accumulated impairment losses	(16,375)
Goodwill	1,229,159
Goodwill acquired during year	487
Foreign currency translation	(7,264)
Goodwill	1,238,757
Accumulated impairment losses	(16,375)
Goodwill	1,222,382
Feed Ingredients
Goodwill [Roll Forward]
Goodwill	791,966
Accumulated impairment losses	(15,914)
Goodwill	776,052
Goodwill acquired during year	396
Foreign currency translation	(1,306)
Goodwill	791,056
Accumulated impairment losses	(15,914)
Goodwill	775,142
Fuel Ingredients
Goodwill [Roll Forward]
Goodwill	117,867
Accumulated impairment losses	0
Goodwill	117,867
Goodwill acquired during year	0
Foreign currency translation	(1,410)
Goodwill	116,457
Accumulated impairment losses	0
Goodwill	116,457
Food Ingredients
Goodwill [Roll Forward]
Goodwill	335,701
Accumulated impairment losses	(461)
Goodwill	335,240
Goodwill acquired during year	91
Foreign currency translation	(4,548)
Goodwill	331,244
Accumulated impairment losses	(461)
Goodwill	$ 330,783

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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