XML 63 R49.htm IDEA: XBRL DOCUMENT
v3.22.2

Revolving Notes - Additional Information (Detail) | 9 Months Ended |
--- | --- | ---
May 31, 2022 USD ($) CreditFacility Facility | Aug. 31, 2021 USD ($)
Line of Credit Facility [Line Items] |  |
Line of credit facility maximum capacity | $ 85,000,000.0 |
Long-term line of credit | $ 303,300,000 | $ 372,200,000
Number of lines of credits | CreditFacility | 4 |
Senior Secured Credit Facilities, Consisting of 4 Components |  |
Line of Credit Facility [Line Items] |  |
Number of senior secured credit facilities | Facility | 4 |
Line of credit facility maximum capacity | $ 1,100,000,000 |
Letter of credit facility outstanding amount | 6,900,000 | 8,400,000
Revolving Line of Credit, 1st Component of Senior Secured Credit Facilities |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility maximum capacity | $ 600,000,000.0 |
Line of credit maturity date | 2026-08 |
Revolving Line of Credit, 1st Component of Senior Secured Credit Facilities | LIBOR |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 1.50% |
Revolving Line of Credit, 1st Component of Senior Secured Credit Facilities | Prime Rate |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 0.50% |
GBX Leasing Warehouse Facility |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility maximum capacity | $ 350,000,000.0 |
Line of credit maturity date | 2025-04 |
Percentage of ownership in joint venture | 95.00% |
Long-term line of credit |  | $ 147,000,000.0
GBX Leasing Warehouse Facility | LIBOR |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 2.00% |
European Line of Credit, 2nd Component of Senior Secured Credit Facilities |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility maximum capacity | $ 73,700,000 |
Long-term line of credit | $ 35,400,000 |
European Line of Credit, 2nd Component of Senior Secured Credit Facilities | Minimum |  |
Line of Credit Facility [Line Items] |  |
Line of credit maturity date | 2022-07 |
European Line of Credit, 2nd Component of Senior Secured Credit Facilities | Maximum |  |
Line of Credit Facility [Line Items] |  |
Line of credit maturity date | 2023-10 |
European Line of Credit, 2nd Component of Senior Secured Credit Facilities | WIBOR | Minimum |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 1.20% |
European Line of Credit, 2nd Component of Senior Secured Credit Facilities | WIBOR | Maximum |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 1.50% |
European Line of Credit, 2nd Component of Senior Secured Credit Facilities | EURIBOR |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 1.10% |
Mexican Railcar Manufacturing Operations Line of Credit, 3rd Component of Senior Secured Credit Facilities |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility maximum capacity | $ 120,000,000.0 |
Mexican Railcar Manufacturing Operations Line of Credit 1, 3rd Component of Senior Secured Credit Facilities |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility maximum capacity | $ 30,000,000.0 |
Joint venture partner each guaranteed percentage | 50.00% |
Line of credit facility borrowings outstanding due period | 2024-06 |
Mexican Railcar Manufacturing Operations Line of Credit 1, 3rd Component of Senior Secured Credit Facilities | LIBOR | Minimum |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 3.75% |
Mexican Railcar Manufacturing Operations Line of Credit 1, 3rd Component of Senior Secured Credit Facilities | LIBOR | Maximum |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 4.25% |
Mexican Railcar Manufacturing Operations Line of Credit 2, 3rd Component of Senior Secured Credit Facilities |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility maximum capacity | $ 35,000,000.0 |
Joint venture partner each guaranteed percentage | 50.00% |
Line of credit facility borrowings outstanding due period | 2023-06 |
Mexican Railcar Manufacturing Operations Line of Credit 2, 3rd Component of Senior Secured Credit Facilities | LIBOR |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 3.70% |
Mexican Railcar Manufacturing Operations Line of Credit 3, 3rd Component of Senior Secured Credit Facilities |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility maximum capacity | $ 50,000,000.0 |
Line of credit facility borrowings outstanding due period | 2024-10 |
Mexican Railcar Manufacturing Operations Line of Credit 3, 3rd Component of Senior Secured Credit Facilities | LIBOR |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 4.25% |
Mexican Railcar Manufacturing Operations Line of Credit 4, 3rd Component of Senior Secured Credit Facilities |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility maximum capacity | $ 5,000,000.0 |
Line of credit facility borrowings outstanding due period | 2022-09 |
Mexican Railcar Manufacturing Operations Line of Credit 4, 3rd Component of Senior Secured Credit Facilities | LIBOR |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 2.95% |

X
- Definition Line Of Credit Facility Expiration Month And Year + References No definition available. + Details
Name: | gbx_LineOfCreditFacilityExpirationMonthAndYear
Namespace Prefix: | gbx_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line of Credit Maturity Month and Year + References No definition available. + Details
Name: | gbx_LineOfCreditMaturityMonthAndYear
Namespace Prefix: | gbx_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of credit facility components. + References No definition available. + Details
Name: | gbx_NumberOfCreditFacilityComponents
Namespace Prefix: | gbx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Debt Instrument + References No definition available. + Details
Name: | gbx_NumberOfDebtInstrument
Namespace Prefix: | gbx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage Of Joint Venture Debt Guaranteed + References No definition available. + Details
Name: | gbx_PercentageOfJointVentureDebtGuaranteed
Namespace Prefix: | gbx_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of ownership interest in joint venture. + References No definition available. + Details
Name: | gbx_PercentageOfOwnershipInterestInJointVenture
Namespace Prefix: | gbx_
Data Type: | dtr-types:percentItemType
Balance Type: | na
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: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the 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)) -URI https://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 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 3: 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 https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
Name: | us-gaap_LineOfCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_LineOfCreditFacilityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_LineOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
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_VariableRateAxis=us-gaap_PrimeRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=gbx_GBXLeasingWarehouseFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_ForeignLineOfCreditMember
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_VariableRateAxis=gbx_WiborMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=gbx_EuroInterbankOfferedRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=gbx_ForeignLineOfCreditTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=gbx_SeniorSecuredCreditFacilityRevolvingLineOfCreditComponentOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=gbx_SeniorSecuredCreditFacilityRevolvingLineOfCreditComponentTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=gbx_SeniorSecuredCreditFacilityRevolvingLineOfCreditComponentThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=gbx_SeniorSecuredCreditFacilityRevolvingLineOfCreditComponentFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |