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Related Party Transactions (Company's Investment Balance in Equity Method Investees) (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018 | Jun. 30, 2018
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Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract] |  |  |  |
Equity method investments |  | $ 120,929 | $ 242,326 | $ 232,159
The Andersons Albion Ethanol LLC |  |  |  |
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract] |  |  |  |
Equity method investments |  | $ 50,760 | 50,382 | 47,474
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 |  | $ 25,260 | 24,242 | 21,214
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 |  | $ 16,294 | 14,841 | 14,344
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 | 97,476
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 | 49,251
Providence Grain Group Inc. |  |  |  |
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract] |  |  |  |
Equity method investments |  | $ 17,161 | 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 |  | $ 11,454 | $ 2,159 | $ 2,400
[1] | The Company previously owned approximately 32.5% of LTG. Effective January 1, 2019, the Company purchased the remaining equity of LTG. The transaction results in the consolidation of Thompsons Limited of Ontario, Canada and related entities, which LTG and the Company had equally owned.

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