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Debt (Schedule Of Short-term Notes Payable And Other Borrowings) (Details) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
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Debt Instrument [Line Items] |  |
Short-term notes payable and other borrowings | $ 140,808,000 | $ 187,812,000
Other Short Term Debt [Member] |  |
Debt Instrument [Line Items] |  |
Short-term notes payable and other borrowings | 1,175,000 |
Green Plains Trade [Member] | $300.0 Million Revolver [Member] |  |
Debt Instrument [Line Items] |  |
Short-term notes payable and other borrowings | 79,251,000 | 138,204,000
Debt instrument, face amount | 300,000,000.0 |
Green Plains Grain [Member] | $100.0 Million Revolver [Member] |  |
Debt Instrument [Line Items] |  |
Short-term notes payable and other borrowings | 38,700,000 | 40,000,000
Debt instrument, face amount | 100,000,000.0 | 100,000,000.0
Green Plains Grain [Member] | $50.0 Million Inventory Financing [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument, face amount | 50,000,000.0 |
Green Plains Commodity Management [Member] | $30.0 Million Hedge Line [Member] |  |
Debt Instrument [Line Items] |  |
Short-term notes payable and other borrowings | 21,682,000 | $ 9,608,000
Debt instrument, face amount | $ 30,000,000.0 |

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