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Related Party Transactions (Company's Investment Balance in Equity Method Investees) (Details) - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments		$ 117,348	$ 242,326	$ 240,350
The Andersons Albion Ethanol LLC
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments		$ 48,863	50,382	49,882
Percentage of company ownership interest		55.00%
The Andersons Clymers Ethanol LLC
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments		$ 23,752	24,242	22,589
Percentage of company ownership interest		39.00%
The Andersons Marathon Ethanol LLC
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments		$ 15,762	14,841	15,373
Percentage of company ownership interest		33.00%
Lansing Trade Group LLC
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments	[1]	$ 0	$ 101,715	99,904
Percentage of company ownership interest			32.50%
Thompsons Limited
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments	[1]	0	$ 48,987	50,280
Providence Grain Group Inc.
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments		$ 17,195	0	0
Percentage of company ownership interest		39.00%
Other
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments		$ 11,776	$ 2,159	$ 2,322
[1] The Company previously owned approximately 32.5% of LTG. Effective January 1, 2019, the Company purchased the remaining equity of LTG. The transaction resulted in the consolidation of Thompsons Limited of Ontario, Canada and related entities, which LTG and the Company had equally owned.

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- Definition

Equity method investment company's investment balance in each equity method investees by entity.

+ References

No definition available.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 25
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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