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Acquisitions (Narrative) (Details)
$ in Thousands, gal in Millions
1 Months Ended 9 Months Ended
Nov. 12, 2015
USD ($)
gal
Sep. 23, 2016
USD ($)
property
gal
Sep. 30, 2016
USD ($)
Acquisition of Abengoa Ethanol Plants [Member]      
Business Acquisition [Line Items]      
Acquisition price   $ 237,400  
Number of ethanol plants | property   3  
Expected annual ethanol production capacity | gal   236  
Property and equipment, net   $ 235,395  
Working capital acquired or assumed   15,200  
Acquisition related costs     $ 800
Acquisition of Green Plains Hereford [Member]      
Business Acquisition [Line Items]      
Expected annual ethanol production capacity | gal 100    
Property and equipment, net $ 78,786    
Working capital acquired or assumed $ 19,400    
Green Plains Partners LP [Member] | Acquisition of Abengoa Ethanol Plants [Member]      
Business Acquisition [Line Items]      
Transfer between entities under control   $ 90,000  
Green Plains Partners LP [Member] | Acquisition of Green Plains Hereford [Member]      
Business Acquisition [Line Items]      
Transfer between entities under control     $ 62,300