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Divestitures and Held-For-Sale (Narrative) (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Feb. 29, 2020 USD ($) | Feb. 29, 2020 USD ($) | Feb. 28, 2019 USD ($) | Aug. 31, 2019 USD ($) | Aug. 31, 2018 Facility
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |  |
Loss on sale of irrigation dealership |  | $ 0 | $ 67 |  |
Note receivable from sale of business |  | 0 | 5,823 |  |
Assets held-for-sale | $ 0 | 0 | 2,744 | $ 2,744 |
Net proceeds from the sale of building | 3,900 | 3,955 | 0 |  |
Gain from the sale of building | $ 1,200 | $ 1,191 | 0 |  |
North America [Member] | Infrastructure [Member] |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |  |
Number of manufacturing facilities closed | Facility |  |  |  |  | 1
General and Administrative Expense [Member] |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |  |
Loss on sale of irrigation dealership |  |  | $ 100 |  |

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