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Basis Of Presentation, Description Of Business And Summary Of Significant Accounting Policies (Narrative) (Details) $ in Thousands |  | 3 Months Ended | 6 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Jul. 01, 2015 | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) | Sep. 30, 2020 USD ($) segment | Sep. 30, 2019 USD ($) | Dec. 31, 2019 USD ($)
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |
Asset | [1] |  | $ 1,537,420 |  |  |  |  | $ 1,537,420 |  | $ 1,698,218
Total liabilities |  |  | 733,865 |  |  |  |  | 733,865 |  | 832,932
Revenues |  |  | 424,062 |  | $ 632,350 | [2] |  | 1,444,955 | $ 1,701,560 |
Cost of goods sold |  |  | 393,933 |  | 632,129 |  |  | $ 1,372,057 | 1,700,481 |
Number of operating segments | segment |  |  |  |  |  |  |  | 4 |  |
Ethanol Production [Member] |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |
Revenues |  |  | 332,978 |  | 484,406 | [2] |  | $ 1,099,245 | 1,206,182 |
Agribusiness and Energy Services [Member] |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |
Revenues |  |  | 95,428 |  | 153,943 | [2] |  | 359,108 | 508,119 |
Partnership [Member] |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |
Revenues |  |  | 21,382 |  | $ 20,154 | [2] |  | 62,034 | $ 62,066 |
Green Plains Partners L.P. [Member] |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |
Asset |  |  | 87,300 |  |  |  |  | 87,300 |  | 90,000
Total liabilities |  |  | $ 165,100 |  |  |  |  | $ 165,100 |  | $ 180,900
BioProcess Algae [Member] |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |
Less than wholly owned subsidiary, parent ownership percentage |  |  |  |  |  |  |  | 90.00% |  |
IPO [Member] | Limited Partner [Member] |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |
Ownership interest, public, percentage |  | 49.10% |  |  |  |  |  |  |  |
IPO [Member] | Limited Partner [Member] | Parent Company [Member] |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |
Ownership interest, percentage |  | 48.90% |  |  |  |  |  |  |  |
IPO [Member] | General Partner [Member] | Parent Company [Member] |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |
Ownership interest, percentage |  | 2.00% |  |  |  |  |  |  |  |
Restatement Adjustment [Member] |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  | $ (30,000) |  |  | $ (30,000) |  |  |
Cost of goods sold |  |  |  | $ (30,000) |  |  | $ (30,000) |  |  |
[1] | Asset balances by segment exclude intercompany balances
[2] | Product revenues, costs of goods sold and selling, general and administrative expenses include certain revenue and expense items which were previously considered intercompany transactions prior to the disposition of GPCC and therefore eliminated upon consolidation. These revenue and costs of goods sold transactions total $5.5 million and $14.5 million for the three and nine months ended September 30, 2019, respectively.

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