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Business Acquisition Business Acquisition (Details 2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended 1 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2012
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]        
Net income $ 122,645us-gaap_ProfitLoss $ 95,702us-gaap_ProfitLoss $ 75,565us-gaap_ProfitLoss  
Combined entity pro forma, Revenue     5,798,354ande_BusinessAcquisitionCombinedEntityProformaRevenue  
Combined entity, Operating Income (Loss)     122,550ande_BusinessAcquisitionsProFormaCombinedEntityPretaxNetIncomeLoss  
Green Plains Grain Company        
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]        
Revenues       40,477us-gaap_Revenues
/ us-gaap_BusinessAcquisitionAxis
= ande_GreenPlainsGrainCompanyMember
Net income       (785)us-gaap_ProfitLoss
/ us-gaap_BusinessAcquisitionAxis
= ande_GreenPlainsGrainCompanyMember
Supplemental pro forma revenue     566,821us-gaap_BusinessAcquisitionsProFormaRevenue
/ us-gaap_BusinessAcquisitionAxis
= ande_GreenPlainsGrainCompanyMember
 
Supplemental pro forma, Operating Income (Loss)     $ 1,632us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
/ us-gaap_BusinessAcquisitionAxis
= ande_GreenPlainsGrainCompanyMember