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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% |

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