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Debt (Schedule Of The Components Of Long-Term Debt) (Details) - USD ($) | Dec. 31, 2020 | Sep. 03, 2020 | Dec. 31, 2019 | Aug. 31, 2016
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Debt Instrument [Line Items] |  |  |  |  |
Total book value of long-term debt |  | $ 391,502,000 |  | $ 381,365,000 |
Unamortized debt issuance costs |  | (6,151,000) |  | (4,820,000) |
Less: current maturities of long-term debt |  | (98,052,000) |  | (132,555,000) |
Total long-term debt |  | 287,299,000 |  | 243,990,000 |
Convertible Notes [Member] | 4.125% Convertible Notes Due 2022 [Member] | Corporate Activities [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total book value of long-term debt | [1] | 156,441,000 |  | 149,256,000 |
Unamortized debt issuance costs |  | (1,300,000) |  | (2,000,000.0) |
Debt instrument, face amount |  | 170,000,000.0 |  | 170,000,000.0 | $ 170,000,000.0
Convertible Notes [Member] | 4.00% Convertible Notes Due 2024 [Member] | Corporate Activities [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total book value of long-term debt | [2] | 89,125,000 |  | 83,497,000 |
Unamortized debt issuance costs |  | (2,200,000) |  | (2,800,000) |
Debt instrument, face amount |  | 115,000,000.0 |  | 115,000,000.0 |
Other Debt Obligations [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total book value of long-term debt |  | 15,936,000 |  | 16,512,000 |
Green Plains Wood River and Green Plains Shenandoah [Member] | $75.0 Million Delayed Draw Loan Agreement [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total book value of long-term debt | [3] | 30,000,000 |  |  |
Unamortized debt issuance costs |  | (300,000) |  |  |
Debt instrument, face amount |  | 75,000,000.0 | $ 75,000,000.0 | 75,000,000.0 |
Credit Facility [Member] | Green Plains Partners [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total book value of long-term debt | [4] | 100,000,000 |  | 132,100,000 |
Debt instrument, face amount |  | 135,000,000.0 |  | $ 135,000,000.0 |
Credit Facility [Member] | Green Plains Wood River and Green Plains Shenandoah [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Unamortized debt issuance costs |  | $ (2,300,000) |  |  |
[1] | Includes $1.3 million and $2.0 million of unamortized debt issuance costs as of December 31, 2020 and 2019, respectively.
[2] | Includes $2.2 million and $2.8 million of unamortized debt issuance costs as of December 31, 2020 and 2019, respectively.
[3] | On September 3, 2020, Green Plains Wood River and Green Plains Shenandoah, wholly-owned subsidiaries of the company, entered into a $75.0 million delayed draw loan agreement. The delayed draw loan includes $0.3 million of unamortized debt issuance costs as of December 31, 2020.
[4] | The Green Plains Partners credit facility was amended on June 4, 2020 and includes $2.3 million of unamortized debt issuance costs as of December 31, 2020. Additionally, the credit facility is included in current maturities of long-term debt on the consolidated balance sheet as of December 31, 2020 as its maturity date is December 31, 2021. See below for further discussion.

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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