XML 94 R79.htm IDEA: XBRL DOCUMENT v3.20.4

Debt (Narrative - Ethanol Production, Partnership Segment, Covenant Compliance, And Restricted Net Assets) (Details)			1 Months Ended	12 Months Ended
		Oct. 15, 2020 USD ($)	Jun. 30, 2013 USD ($) item	Dec. 31, 2020 USD ($) item $ / shares	Dec. 31, 2019 USD ($)	Sep. 03, 2020 USD ($)	Jun. 04, 2020 USD ($)	Jun. 03, 2020 USD ($)
Debt Instrument [Line Items]
Restricted assets				$ 77,700,000
Outstanding balance				$ 391,502,000	$ 381,365,000
Birmingham BioEnergy Partners LLC Member]
Debt Instrument [Line Items]
Two promissory notes payable | item			2
Birmingham BioEnergy Partners LLC Member] | Notes Receivable [Member]
Debt Instrument [Line Items]
Note receivable			$ 8,100,000		8,100,000
Birmingham BioEnergy Partners LLC Member] | Notes Payable to Banks [Member] | Promissory Note [Member]
Debt Instrument [Line Items]
Debt instrument, face amount					10,000,000.0
Birmingham BioEnergy Partners LLC Member] | Notes Payable to Banks [Member] | Promissory Note I [Member]
Debt Instrument [Line Items]
Debt instrument, face amount			1,900,000		1,900,000
Birmingham BioEnergy Partners LLC Member] | Notes Payable to Banks [Member] | Promissory Note II [Member]
Debt Instrument [Line Items]
Debt instrument, face amount			$ 8,100,000
Debt amount forgiven					8,100,000
Green Plains Wood River and Green Plains Shenandoah [Member] | $75.0 Million Delayed Draw Loan Agreement [Member]
Debt Instrument [Line Items]
Debt instrument, draw period				18 months
Debt instrument, face amount				$ 75,000,000.0	$ 75,000,000.0	$ 75,000,000.0
Interest rate, stated percentage				5.02%
Interest rate premium				1.50%
Debt maturity dates				Sep. 01, 2035
Minimum working capital required for compliance, per gallon				0.10%
Minimum working capital required for compliance				$ 102,300,000
Minimum loan to value ratio, percent				50.00%
Fixed charge coverage ratio				1.25
Debt service reserve term of future payments				6 months
Annual principal payments				$ 1,500,000
Months before first payment after closing				24 months
Outstanding balance	[1]			$ 30,000,000
Green Plains Wood River and Green Plains Shenandoah [Member] | $75.0 Million Delayed Draw Loan Agreement [Member] | Minimum [Member]
Debt Instrument [Line Items]
Unused capacity fee, percentage				0.00%
Green Plains Wood River and Green Plains Shenandoah [Member] | $75.0 Million Delayed Draw Loan Agreement [Member] | Maximum [Member]
Debt Instrument [Line Items]
Unused capacity fee, percentage				1.50%
Green Plains Partners [Member] | Hereford Ethanol Plant [Member]
Debt Instrument [Line Items]
Payments on credit facility				$ 10,000,000.0
Green Plains Partners [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Unused capacity fee, percentage				0.50%
Benchmark of prepayments in excess of scheduled monthly payments				$ 40,000,000.0
Debt instrument, face amount							$ 135,000,000.0	$ 200,000,000.0
Debt maturity dates				Dec. 31, 2021
Consolidated net leverage ratio decrease each quarter				0.25
Line of credit, threshold of cash balance, payment required				$ 2,500,000
Threshold cash balance, number of consecutive business days | item				5
Line of credit, percent of net cash proceeds required for outstanding principal				100.00%
Line of credit terms, maximum per unit quarterly payments | $ / shares				$ 0.12
Green Plains Partners [Member] | Expected By Fourth Quarter Of 2021 [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Consolidated net leverage ratio				1.50
Green Plains Partners [Member] | Minimum [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate, basis for effective rate				1.0%
Consolidated debt service coverage ratio				1.1
Green Plains Partners [Member] | Minimum [Member] | If Less Than $40 Million In Prepayments Prior To April 1, 2021 [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate, basis for effective rate				1.00%
Green Plains Partners [Member] | Minimum [Member] | LIBOR [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate, basis spread on variable rate, percentage				4.50%
Green Plains Partners [Member] | Minimum [Member] | LIBOR [Member] | If Less Than $40 Million In Prepayments Prior To April 1, 2021 [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate, basis spread on variable rate, percentage				5.00%
Green Plains Partners [Member] | Maximum [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Consolidated net leverage ratio				3.0
Green Plains Partners [Member] | Maximum [Member] | LIBOR [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate, basis spread on variable rate, percentage				5.25%
Green Plains Partners [Member] | Maximum [Member] | LIBOR [Member] | If Less Than $40 Million In Prepayments Prior To April 1, 2021 [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate, basis spread on variable rate, percentage				5.75%
Green Plains Partners [Member] | Revolving Credit Facility [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, face amount				$ 5,000,000.0
Debt instrument, term				10 years
Outstanding balance				$ 0
Green Plains Partners [Member] | Revolving Credit Facility [Member] | Minimum [Member] | Prime Rate [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate, basis spread on variable rate, percentage				3.50%
Green Plains Partners [Member] | Revolving Credit Facility [Member] | Maximum [Member] | Prime Rate [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate, basis spread on variable rate, percentage				4.25%
Green Plains Partners [Member] | Term Loan [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate, basis for effective rate				6.00%
Debt instrument, face amount				$ 130,000,000.0
Payments on credit facility				$ 30,000,000.0
Scheduled periodic principal payments		$ 2,500,000
Debt Instrument, Date of First Required Payment				Oct. 15, 2020
Outstanding balance				$ 100,000,000.0
Green Plains Partners [Member] | Term Loan [Member] | Term Loan, Payments Beginning In May 15, 2021 [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Principal payments (plus interest)				$ 3,200,000
[1] 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.

X

- Definition

Benchmark Of Prepayments In Excess Of Scheduled Monthly Payments

+ References

No definition available.

+ Details

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

X

- Definition

Consolidated Debt Service Coverage Ratio

+ References

No definition available.

+ Details

Name:	gpre_ConsolidatedDebtServiceCoverageRatio
Namespace Prefix:	gpre_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Consolidated Net Leverage Ratio Decrease Each Quarter

+ References

No definition available.

+ Details

Name:	gpre_ConsolidatedNetLeverageRatioDecreaseEachQuarter
Namespace Prefix:	gpre_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Debt Instrument, Draw Period

+ References

No definition available.

+ Details

Name:	gpre_DebtInstrumentDrawPeriod
Namespace Prefix:	gpre_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Debt Instrument, Interest Rate Premium

+ References

No definition available.

+ Details

Name:	gpre_DebtInstrumentInterestRatePremium
Namespace Prefix:	gpre_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Debt Instrument, Months Before First Payment After Closing

+ References

No definition available.

+ Details

Name:	gpre_DebtInstrumentMonthsBeforeFirstPaymentAfterClosing
Namespace Prefix:	gpre_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Debt Service Reserve Term Of Future Payments

+ References

No definition available.

+ Details

Name:	gpre_DebtServiceReserveTermOfFuturePayments
Namespace Prefix:	gpre_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fixed Charge Coverage Ratio

+ References

No definition available.

+ Details

Name:	gpre_FixedChargeCoverageRatio
Namespace Prefix:	gpre_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line of credit, percent of net cash proceeds required for outstanding principal

+ References

No definition available.

+ Details

Name:	gpre_LineOfCreditPercentOfNetCashProceedsRequiredForOutstandingPrincipal
Namespace Prefix:	gpre_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line Of Credit Terms, Maximum Per Unit Quarterly Payments

+ References

No definition available.

+ Details

Name:	gpre_LineOfCreditTermsMaximumPerUnitQuarterlyPayments
Namespace Prefix:	gpre_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line Of Credit, Threshold Cash Balance, Number Of Consecutive Business Days

+ References

No definition available.

+ Details

Name:	gpre_LineOfCreditThresholdCashBalanceNumberOfConsecutiveBusinessDays
Namespace Prefix:	gpre_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line Of Credit, Threshold Of Cash Balance, Payment Required

+ References

No definition available.

+ Details

Name:	gpre_LineOfCreditThresholdOfCashBalancePaymentRequired
Namespace Prefix:	gpre_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Minimum Loan To Value Ratio, Percent

+ References

No definition available.

+ Details

Name:	gpre_MinimumLoanToValueRatioPercent
Namespace Prefix:	gpre_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Working capital - current assets less current liabilities

+ References

No definition available.

+ Details

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

X

- Definition

Minimum Working Capital Required For Compliance, Per Gallon

+ References

No definition available.

+ Details

Name:	gpre_MinimumWorkingCapitalRequiredForCompliancePerGallon
Namespace Prefix:	gpre_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number Of Promissory Notes Payable

+ References

No definition available.

+ Details

Name:	gpre_NumberOfPromissoryNotesPayable
Namespace Prefix:	gpre_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e)(3)(ii))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

Name:	us-gaap_AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of the total principal payments made during the annual reporting period.

+ References

Reference 1: 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

+ Details

Name:	us-gaap_DebtInstrumentAnnualPrincipalPayment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- 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

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Date the debt agreement requires the first payment to be made, in CCYY-MM-DD format.

+ References

Reference 1: 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 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentDateOfFirstRequiredPayment1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Description of any adjustments made to the stated rate to determine the effective rate.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: 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(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: 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(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- 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/disclosureRef
-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=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

Reference 1: 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 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPayment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of the required periodic payments applied to principal.

+ References

Reference 1: 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

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPaymentPrincipal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

Name:	us-gaap_ExtinguishmentOfDebtAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount, after allowance for credit loss, of financing receivable, classified as noncurrent.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_NotesAndLoansReceivableNetNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Indebtedness divided by net capital.

+ References

No definition available.

+ Details

Name:	us-gaap_RatioOfIndebtednessToNetCapital1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

Name:	us-gaap_RepaymentsOfLongTermLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

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

X

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_NotesReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_NotesPayableToBanksMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=gpre_PromissoryNoteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=gpre_PromissoryNoteIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=gpre_PromissoryNoteIiMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=gpre_DelayedDrawLoanAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=gpre_HerefordEthanolPlantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=gpre_CreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=gpre_ExpectedByFourthQuarterOf2021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=gpre_IfLessThan40MillionInPrepaymentsPriorToApril12021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_PrimeRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=gpre_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=gpre_TermLoanPaymentsBeginningInMay152021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: