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Related Party Transactions (Details) (USD $) In Thousands, unless otherwise specified
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Mar. 31, 2015
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Dec. 31, 2014
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Mar. 31, 2014
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| Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract] |
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| Equity method investments |
$ 222,082us-gaap_EquityMethodInvestments |
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$ 226,857us-gaap_EquityMethodInvestments |
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$ 232,396us-gaap_EquityMethodInvestments |
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| The Andersons Albion Ethanol LLC |
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| Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract] |
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| Equity method investments |
28,726us-gaap_EquityMethodInvestments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ande_AndersonsAlbionEthanolLlcMember |
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27,824us-gaap_EquityMethodInvestments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ande_AndersonsAlbionEthanolLlcMember |
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31,867us-gaap_EquityMethodInvestments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ande_AndersonsAlbionEthanolLlcMember |
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| The Andersons Clymers Ethanol LLC |
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| Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract] |
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| Equity method investments |
36,063us-gaap_EquityMethodInvestments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ande_AndersonsClymersEthanolLlcMember |
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37,624us-gaap_EquityMethodInvestments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ande_AndersonsClymersEthanolLlcMember |
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40,412us-gaap_EquityMethodInvestments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ande_AndersonsClymersEthanolLlcMember |
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| The Andersons Marathon Ethanol LLC |
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| Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract] |
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| Equity method investments |
31,869us-gaap_EquityMethodInvestments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ande_AndersonsMarathonEthanolLlcMember |
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31,537us-gaap_EquityMethodInvestments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ande_AndersonsMarathonEthanolLlcMember |
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45,946us-gaap_EquityMethodInvestments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ande_AndersonsMarathonEthanolLlcMember |
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| Lansing Trade Group LLC |
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| Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract] |
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| Equity method investments |
78,594us-gaap_EquityMethodInvestments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ande_LansingTradeGroupLlcMember |
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78,696us-gaap_EquityMethodInvestments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ande_LansingTradeGroupLlcMember |
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60,837us-gaap_EquityMethodInvestments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ande_LansingTradeGroupLlcMember |
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| Thompsons Limited |
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| Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract] |
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| Equity method investments |
44,224us-gaap_EquityMethodInvestments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ande_ThompsonsLimitedMember |
[1] |
48,455us-gaap_EquityMethodInvestments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ande_ThompsonsLimitedMember |
[1] |
49,520us-gaap_EquityMethodInvestments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ande_ThompsonsLimitedMember |
[1] |
| Other |
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| Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract] |
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| Equity method investments |
$ 2,606us-gaap_EquityMethodInvestments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ande_OtherEntityMember |
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$ 2,721us-gaap_EquityMethodInvestments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ande_OtherEntityMember |
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$ 3,814us-gaap_EquityMethodInvestments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ande_OtherEntityMember |
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