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Related Party Transactions (Textual) (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2017
USD ($)
Mar. 02, 2018
gal
Dec. 31, 2017
USD ($)
Related Party Transaction [Line Items]            
Total distributions received from unconsolidated affiliates $ 2.1   $ 0.6      
Revenues recognized for the sale of ethanol 172.3 $ 161.3 318.5 $ 284.5    
Revenues recognized for the sale of corn   125.5   243.0    
Related party, gross assets 8.1 0.6 8.1 0.6   $ 0.2
Related party, gross liability $ 3.9 $ 0.7 $ 3.9 $ 0.7   $ 2.5
ELEMENT, LLC | Subsidiary            
Related Party Transaction [Line Items]            
Noncontrolling interest is attributed of all gains and losses of parent (percentage)         49.00%  
Percentage of company's interest in subsidiary         51.00%  
Maximum production capacity of bio-refinery (gallons) | gal         70,000,000  
TAME            
Related Party Transaction [Line Items]            
Percentage of company ownership interest (percentage) 33.00%   33.00%