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Related Party Transactions (Company's Investment Balance in Equity Method Investees) (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2018
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Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract] |  |  |  |
Equity method investments |  | $ 121,781 | $ 242,326 | $ 224,449
The Andersons Albion Ethanol LLC |  |  |  |
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract] |  |  |  |
Equity method investments |  | $ 50,641 | 50,382 | 46,145
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 |  | $ 24,823 | 24,242 | 20,339
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 |  | $ 15,650 | 14,841 | 12,615
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 | 94,483
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 | 48,362
Providence Grain |  |  |  |
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract] |  |  |  |
Equity method investments |  | $ 19,258 | 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 |  | $ 11,409 | $ 2,159 | $ 2,505
[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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- Definition Equity method investment company's investment balance in each equity method investees by entity. + References No definition available. + Details
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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571 + Details
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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66022249&loc=d3e33749-111570 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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