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Equity Method Investments (Summary Of Balance Sheet Of Equity Method Investment) (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]    
Current assets $ 508,677 $ 667,913
Current liabilities 331,480 541,791
Green Plains Cattle Company LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Current assets 498,868 516,324
Noncurrent assets 70,893 73,922
Current liabilities 429,922 461,534
Noncurrent liabilities 349 390
Net assets $ 139,490 $ 128,322