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v3.21.2

Acquisitions - Additional Information (Detail) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jul. 26, 2019 USD ($) Railcar | Aug. 31, 2021 USD ($) | Aug. 31, 2020 USD ($) | Aug. 31, 2019 USD ($)
Business Acquisition [Line Items] |  |  |  |
Revenue |  | $ 1,747,981 | $ 2,792,189 | $ 3,033,591
Loss from operations |  | 40,970 | 168,429 | 184,116
Manufacturing |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Revenue |  | 1,329,987 | 2,349,971 | 2,431,499
Loss from operations |  | 67,124 | $ 197,388 | 217,583
American Railcar Industries |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business combination estimated gross purchase price | $ 417,200 |  |  |
Number of railcar manufacturing facilities acquired | Railcar | 2 |  |  |
Business combination consideration transferred for capital expenditures | $ 8,500 |  |  |
American Railcar Industries | 2024 Convertible Senior Notes |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Convertible senior notes |  | 50,000 |  |
Senior term debt |  | $ 300,000 |  |
American Railcar Industries | Manufacturing |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Revenue |  |  |  | 43,000
Loss from operations |  |  |  | $ 1,600

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