XML 19 R70.htm IDEA: XBRL DOCUMENT v2.4.1.9

Debt (Schedule Of Free Cash Flow Payments Annual Threshold) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Green Plains Processing [Member]
Debt Instrument [Line Items]
Free cash flow payment annual threshold	$ 54.0gpre_FreeCashFlowPaymentAnnualThreshold / dei_LegalEntityAxis = gpre_GreenPlainsProcessingMember
Former Free Cash Flow Payment Annual Threshold	27.0gpre_FormerFreeCashFlowPaymentAnnualThreshold / dei_LegalEntityAxis = gpre_GreenPlainsProcessingMember
Ethanol Production Segment [Member] | Green Plains Bluffton [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Free cash flow payment annual threshold	$ 4.0gpre_FreeCashFlowPaymentAnnualThreshold / dei_LegalEntityAxis = gpre_GreenPlainsBlufftonMember / us-gaap_LongtermDebtTypeAxis = gpre_TermLoanMember / us-gaap_StatementBusinessSegmentsAxis = gpre_EthanolProductionSegmentMember

X

- Definition

Former Free Cash Flow Payment Annual Threshold

+ References

No definition available.

+ Details

Name:	gpre_FormerFreeCashFlowPaymentAnnualThreshold
Namespace Prefix:	gpre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Free Cash Flow Payment Annual Threshold

+ References

No definition available.

+ Details

Name:	gpre_FreeCashFlowPaymentAnnualThreshold
Namespace Prefix:	gpre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	dei_LegalEntityAxis=gpre_GreenPlainsProcessingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=gpre_EthanolProductionSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: