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Earnings Per Share (Schedule Of Basic And Diluted Earnings Per Share) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Earnings Per Share [Abstract]    
Net income (loss) attributable to Green Plains $ (3,597) $ (24,138)
Weighted average shares outstanding - basic 38,420 38,197
EPS - basic $ (0.09) $ (0.63)
Weighted average shares outstanding - diluted 38,420 38,197
EPS - diluted $ (0.09) $ (0.63)