Related Party Transactions (Income (Losses) of Company's Equity Method Investees) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2020	Sep. 30, 2019
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Income earned from Company's equity method investees	$ 638	$ (7,359)	$ 27,141
Andersons Albion Ethanol LLC
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Percentage of company ownership interest (percentage)					55.00%
Income earned from Company's equity method investees	0	(1,292)	5,531
Andersons Clymers Ethanol LLC
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Percentage of company ownership interest (percentage)					39.00%
Income earned from Company's equity method investees	0	(151)	4,846
Andersons Marathon Ethanol LLC
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Percentage of company ownership interest (percentage)					33.00%
Income earned from Company's equity method investees	0	920	$ 3,832
Lansing Trade Group LLC
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Percentage of company ownership interest (percentage)			32.50%
Income earned from Company's equity method investees	0	0	$ 10,413
Thompsons Limited
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Income earned from Company's equity method investees	$ 0	0	2,568
Providence Grain
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Percentage of company ownership interest (percentage)	37.80%
Income earned from Company's equity method investees	$ (233)	(7,411)	0
Quadra Commodities S.A.
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Percentage of company ownership interest (percentage)	17.70%
Income earned from Company's equity method investees	$ 1,439	910	0
Other
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Income earned from Company's equity method investees	$ (568)	$ (335)	$ (49)
Other | Minimum
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Percentage of company ownership interest (percentage)				5.00%
Other | Maximum
Income Earned From Companys Equity Method Investments By Entity [Abstract]
Percentage of company ownership interest (percentage)				52.00%