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Debt (Schedule Of Maturity Dates Of Long-Term Debt) (Details)	12 Months Ended
	Dec. 31, 2014
Green Plains Fairmont and Green Plains Wood River [Member]
Debt Instrument [Line Items]
Debt maturity dates	Nov. 27, 2015
Green Plains Holdings II [Member]
Debt Instrument [Line Items]
Debt maturity dates	Jul. 01, 2019
Green Plains Processing [Member]
Debt Instrument [Line Items]
Debt maturity dates	Jun. 30, 2020
Ethanol Production Segment [Member] | Green Plains Holdings II [Member] | Revolving Term Loans [Member]
Debt Instrument [Line Items]
Debt maturity dates	Jul. 01, 2019
Ethanol Production Segment [Member] | Green Plains Obion [Member] | Revolving Term Loans [Member]
Debt Instrument [Line Items]
Debt maturity dates	May 20, 2020
Ethanol Production Segment [Member] | Green Plains Superior [Member] | Revolving Term Loans [Member]
Debt Instrument [Line Items]
Debt maturity dates	Oct. 20, 2019

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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