XML 60 R39.htm IDEA: XBRL DOCUMENT
v3.21.2

Property, Plant and Equipment, net (Tables) | 12 Months Ended
--- | ---
Aug. 31, 2021
Property Plant And Equipment [Abstract] |
Property, Plant and Equipment, Net |
|  | As of August 31, |
(In thousands) |  | 2021 |  |  | 2020 |
Land and improvements |  | $ | 94,599 |  |  | $ | 94,611 |
Machinery and equipment |  |  | 609,767 |  |  |  | 590,992 |
Buildings and improvements |  |  | 379,073 |  |  |  | 376,272 |
Construction in progress |  |  | 49,997 |  |  |  | 49,717 |
Other |  |  | 92,836 |  |  |  | 97,432 |
|  |  | 1,226,272 |  |  |  | 1,209,024 |
Accumulated depreciation |  |  | (556,051 | ) |  |  | (497,500 | )
|  | $ | 670,221 |  |  | $ | 711,524 |

X
- Definition Schedule of Property, Plant and Equipment. + References No definition available. + Details
Name: | gbx_ScheduleOfPropertyPlantAndEquipmentTableTextBlock
Namespace Prefix: | gbx_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration