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Debt (Details Textual)
12 Months Ended
Apr. 13, 2017
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Debt Instrument [Line Items]      
Maximum borrowing capacity $ 400,000,000    
Current line of credit $ 90,000,000 $ 22,000,000 $ 29,000,000
Line of credit   122,000,000.0  
Debt instrument period of draw down under line of credit 90 days    
Recourse      
Debt Instrument [Line Items]      
Current line of credit   22,000,000 29,000,000
Minimum tangible net worth   $ 255,000,000  
Current ratio net of hedged inventory, maximum   125.00%  
Current ratio net of hedged inventory, minimum   100.00%  
Debt to capitalized ratio maximum   70.00%  
Working capital   $ 150,000,000  
Interest Coverage Ratio Minimum   100.00%  
Interest coverage ratio, minimum   265.00%  
Aggregate annual maturities of long term debt, 2018   $ 54,600,000  
Aggregate annual maturities of long term debt, 2019   12,100,000  
Aggregate annual maturities of long term debt, 2020   20,800,000  
Aggregate annual maturities of long term debt, 2021   35,600,000  
Aggregate annual maturities of long term debt, 2022   150,800,000  
Aggregate annual maturities of long term debt thereafter   202,300,000  
Non-recourse      
Debt Instrument [Line Items]      
Current line of credit   0 $ 0
Working capital   $ 14,000,000  
Debt service coverage ratio, minimum   1.25  
Debt service coverage ratio, maximum   1.00  
Line of credit      
Debt Instrument [Line Items]      
Maximum borrowing capacity $ 800,000,000    
Line of credit | Long Term Line Of Credit | The Andersons Denison Ethanol LLC      
Debt Instrument [Line Items]      
Maximum borrowing capacity   $ 15,000,000  
Line of credit   0  
Standby letters of credit      
Debt Instrument [Line Items]      
Letters of credit outstanding   $ 32,500,000