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Divestitures and Held-For-Sale (Narrative) (Details) $ in Thousands	3 Months Ended
	Nov. 30, 2018 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	$ 67
Note receivable from sale of business	5,823
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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