Goodwill (Details) $ in Thousands	6 Months Ended
Jun. 27, 2020 USD ($)
Goodwill [Roll Forward]
Goodwill	$ 1,239,666
Accumulated impairment losses	(16,375)
Goodwill	1,223,291
Foreign currency translation	(6,114)
Goodwill	1,233,552
Accumulated impairment losses	(16,375)
Goodwill	1,217,177
Feed Ingredients
Goodwill [Roll Forward]
Goodwill	793,457
Accumulated impairment losses	(15,914)
Goodwill	777,543
Foreign currency translation	(6,458)
Goodwill	786,999
Accumulated impairment losses	(15,914)
Goodwill	771,085
Fuel Ingredients
Goodwill [Roll Forward]
Goodwill	116,555
Accumulated impairment losses	0
Goodwill	116,555
Foreign currency translation	(788)
Goodwill	115,767
Accumulated impairment losses	0
Goodwill	115,767
Food Ingredients
Goodwill [Roll Forward]
Goodwill	329,654
Accumulated impairment losses	(461)
Goodwill	329,193
Foreign currency translation	1,132
Goodwill	330,786
Accumulated impairment losses	(461)
Goodwill	$ 330,325

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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

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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 before 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

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