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Related Party Transactions (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 01, 2020
Sep. 30, 2020
Sep. 30, 2020
Sep. 30, 2021
Dec. 31, 2020
Related Party Transaction [Line Items]          
Noncontrolling interests       $ 146,189 $ 129,812
Outstanding accounts payable       $ 112,459 $ 140,058
Green Plains Cattle [Member]          
Related Party Transaction [Line Items]          
Revenues and cost of goods sold subsequent to disposition   $ 2,200 $ 8,200    
Green Plains Cattle [Member] | Mr. Ejnar Knudsen [Member] | Indirect Interest By Mr. Ejnar Knudsen [Member]          
Related Party Transaction [Line Items]          
Indirect ownership interest percentage   0.0736% 0.0736%    
Noncontrolling interests   $ 100 $ 100    
Green Plains Cattle Company LLC [Member]          
Related Party Transaction [Line Items]          
Percent membership interest sold 50.00%   50.00%    
Reduction in selling, general and administrative expenses   $ 400 $ 1,200