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Related Party Transactions (Income (Loss) Earned from Company's Equity Method Investments) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Income earned from Company's equity method investees		$ (3,728)	$ 7,225	$ (2,367)	$ 20,601
The Andersons Albion Ethanol LLC
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Percentage of company ownership interest		55.00%		55.00%
Income earned from Company's equity method investees		$ (1,671)	2,408	$ (1,292)	4,858
The Andersons Clymers Ethanol LLC
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Percentage of company ownership interest		39.00%		39.00%
Income earned from Company's equity method investees		$ (1,427)	1,376	$ (152)	3,121
The Andersons Marathon Ethanol LLC
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Percentage of company ownership interest		33.00%		33.00%
Income earned from Company's equity method investees		$ (532)	1,029	$ 920	2,713
Lansing Trade Group LLC
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Percentage of company ownership interest						32.50%
Income earned from Company's equity method investees	[1]	0	2,428	$ 0	8,603
Equity method investee, ownership percentage after acquisition	[1]			100.00%
Thompsons Limited
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Income earned from Company's equity method investees	[1]	$ 0	35	$ 0	1,345
Equity method investee, ownership percentage after acquisition	[1]			100.00%
Providence Grain Group Inc.
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Percentage of company ownership interest		39.00%		39.00%
Income earned from Company's equity method investees		$ (454)	0	$ (2,297)	0
Other
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Income earned from Company's equity method investees		$ 356	$ (51)	$ 454	$ (39)
Other | Minimum
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Percentage of company ownership interest		5.00%		5.00%
Other | Maximum
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Percentage of company ownership interest		51.00%		51.00%
[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 and related entities, which LTG and the Company had equally owned.

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

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