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Goodwill And Intangible Assets (Narrative) (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 27, 2018 | Sep. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2018
Goodwill, Impairment Loss |  | $ 0 | $ 24,091,000 |
Customer Relationships [Member] |  |  |  |
Finite-lived Intangible Assets Acquired |  |  | 18,800,000 |
Intellectual Property [Member] |  |  |  |
Finite-lived Intangible Assets Acquired |  |  | 10,400,000 |
Trade Names [Member] |  |  |  |
Finite-lived Intangible Assets Acquired |  |  | 1,400,000 |
Fleischmann’s Vinegar Company, Inc. [Member] | Trade Names [Member] |  |  |  |
Intangible assets disposed | $ 10,500,000 |  |  |
Depreciation and amortization expenses |  |  |  | $ 4,400,000
Fleischmann’s Vinegar Company, Inc. [Member] | Customer Relationships [Member] |  |  |  |
Intangible assets disposed | 68,900,000 |  |  |
Depreciation and amortization expenses | $ 11,100,000 |  |  |
Fluid Quip Technologies, LLC [Member] |  |  |  |
Finite-lived Intangible Assets Acquired |  |  | 30,600,000 |
Finite-Lived Intangible Assets, Accumulated Amortization |  |  | $ 200,000 |
Finite-Lived Intangible Assets, Remaining Amortization Period |  |  | 12 years |
Amortization of Intangible Assets |  |  | $ 200,000 |
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months |  |  | 5,900,000 |
Finite-Lived Intangible Assets, Amortization Expense, Year Two |  |  | 5,100,000 |
Finite-Lived Intangible Assets, Amortization Expense, Year Three |  |  | 3,100,000 |
Finite-Lived Intangible Assets, Amortization Expense, Year Four |  |  | 2,700,000 |
Finite-Lived Intangible Assets, Amortization Expense, Year Five |  |  | 2,400,000 |
Finite-Lived Intangible Asset, Expected Amortization, after Year Five |  |  | 11,400,000 |
Ethanol Production [Member] |  |  |  |
Goodwill, Impairment Loss |  |  | 24,091,000 |
Green Plains Partners [Member] |  |  |  |
Goodwill, Impairment Loss |  |  |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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