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Equity Method Investments (Summary Of Statement Of Operations Data Of Equity Method Investee) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
 [1]
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]                      
Revenues $ 478,764 $ 424,062 $ 388,024 $ 632,869 $ 715,677 $ 632,350 $ 630,570 $ 438,641 $ 1,923,719 $ 2,417,238 $ 2,983,932
Total operating expenses                 2,046,415 2,559,808 2,893,978
Net income (loss)                 (89,654) (148,000) $ 36,734
Green Plains Cattle Company LLC [Member]                      
Schedule of Equity Method Investments [Line Items]                      
Revenues [2]                 747,824 370,383  
Total operating expenses [2]                 693,753 362,878  
Net income (loss) [2]                 $ 54,071 $ 7,505  
[1] During the third quarter of 2020, the company identified an immaterial issue which resulted in the overstatement of both revenues and cost of goods sold within the agribusiness and energy services segment as previously reported for the three and six months ended June 30, 2020. The second quarter revenues and cost of goods sold reflected in the quarterly financial data have been revised to correct these amounts.
[2] GPCC equity method treatment began on September 1, 2019 and ended on October 1, 2020. As such, fiscal year 2020 includes nine months of GPCC operations while fiscal year 2019 includes four months of GPCC operations.