Goodwill (Details) - USD ($) $ in Thousands	6 Months Ended
Jul. 02, 2016	Jan. 02, 2016
Segment Reporting Information [Line Items]
Goodwill	$ 1,274,394	$ 1,249,016
Accumulated impairment losses	(15,914)	(15,914)
Goodwill	1,258,480	1,233,102
Goodwill acquired during year	829
Foreign currency translation	24,549
Feed Ingredients [Member]
Segment Reporting Information [Line Items]
Goodwill	829,879	812,797
Accumulated impairment losses	(15,914)	(15,914)
Goodwill	813,965	796,883
Goodwill acquired during year	827
Foreign currency translation	16,255
Fuel Ingredients [Member]
Segment Reporting Information [Line Items]
Goodwill	116,743	112,834
Accumulated impairment losses	0	0
Goodwill	116,743	112,834
Goodwill acquired during year	2
Foreign currency translation	3,907
Food Ingredients [Member]
Segment Reporting Information [Line Items]
Goodwill	327,772	323,385
Accumulated impairment losses	0	0
Goodwill	327,772	$ 323,385
Goodwill acquired during year	0
Foreign currency translation	$ 4,387

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of accumulated impairment loss for 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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