Debt (Schedule Of The Components Of Long-Term Debt) (Details) - USD ($)		Feb. 11, 2022	Dec. 31, 2021	May 18, 2021	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Aug. 31, 2016
Debt Instrument [Line Items]
Total book value of long-term debt			$ 558,847,000			$ 391,502,000
Unamortized debt issuance costs			(9,556,000)			(6,151,000)
Less: current maturities of long-term debt			(35,285,000)			(98,052,000)
Total long-term debt			514,006,000			287,299,000
Convertible Notes [Member] | 2.25% Convertible Notes Due 2027 [Member] | Corporate Activities [Member]
Debt Instrument [Line Items]
Total book value of long-term debt	[1],[2]		230,000,000
Unamortized debt issuance costs			$ (6,500,000)
Debt instrument, face amount					$ 230,000,000.0	$ 2,250,000
Interest rate, stated percentage			2.25%		2.25%
Convertible Notes [Member] | 4.00% Convertible Notes Due 2024 [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage						4.00%
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],[3]		$ 64,000,000			$ 89,125,000
Unamortized debt issuance costs			(100,000)			(1,300,000)
Debt instrument, face amount			$ 4,000,000.00			4,000,000.00		$ 115,000,000.0
Interest rate, stated percentage			4.00%	4.00%			4.00%	4.00%
Convertible Notes [Member] | 4.125% Convertible Notes Due 2022 [Member] | Corporate Activities [Member]
Debt Instrument [Line Items]
Total book value of long-term debt	[2],[4]		$ 34,316,000			156,441,000
Unamortized debt issuance costs			$ (1,200,000)			(2,200,000)
Debt instrument, face amount									$ 170,000,000.0
Interest rate, stated percentage			4.125%						4.125%
Other Debt Obligations [Member]
Debt Instrument [Line Items]
Total book value of long-term debt			$ 15,531,000			15,936,000
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	[5]		30,000,000			30,000,000
Unamortized debt issuance costs			(300,000)			(300,000)
Debt instrument, face amount			75,000,000.0			75,000,000.0
Green Plains SPE LLC [Member] | $125.0 Million Junior Secured Mezzanine Notes Due 2026 [Member]
Debt Instrument [Line Items]
Total book value of long-term debt	[6]		125,000,000
Unamortized debt issuance costs			(900,000)
Debt instrument, face amount			$ 125,000,000.0
Interest rate, stated percentage			11.75%
Credit Facility [Member] | Partnership [Member]
Debt Instrument [Line Items]
Total book value of long-term debt	[7],[8]		$ 60,000,000			100,000,000
Unamortized debt issuance costs			(500,000)			$ (2,300,000)
Debt instrument, face amount			$ 60,000,000.0
Subsequent Event [Member] | Credit Facility [Member] | Partnership [Member]
Debt Instrument [Line Items]
Total book value of long-term debt		$ 59,000,000.0
Debt instrument, debt purchased		$ 1,000,000.0

[1] Includes $6.5 million of unamortized debt issuance costs as of December 31, 2021.

[2] See discussion on early adoption of the amended guidance in ASC 470-20 above.

[3] See discussion below regarding the exchange of convertible notes due in 2024. Includes $1.2 million and $2.2 million of unamortized debt issuance costs as of December 31, 2021 and 2020, respectively.

[4] See discussion below regarding the repurchase of convertible notes due in 2022. Includes $0.1 million and $1.3 million of unamortized debt issuance costs as of December 31, 2021 and 2020, respectively.

[5] 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. Includes $0.3 million of unamortized debt issuance costs as of December 31, 2021 and 2020.

[6] Includes $0.9 million of unamortized debt issuance costs as of December 31, 2021.

[7] On February 11, 2022, the credit facility was modified to allow Green Plains Partners and its affiliates to repurchase outstanding notes. On the same day, the partnership purchased $1.0 million of the outstanding notes from accounts and funds managed by BlackRock and subsequently retired the notes. As of February 11, 2022, the term loan had a balance of $59.0 million.

[8] The Green Plains Partners credit facility was amended on July 20, 2021, reducing the total amount available to $60.0 million and includes $0.5 million and $2.3 million of unamortized debt issuance costs as of December 31, 2021 and 2020, respectively.