Divestitures and Held-For-Sale (Narrative) (Details) $ in Thousands	12 Months Ended
	Aug. 31, 2018 USD ($) Facility
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Loss on sale of businesses	$ 4,056
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 businesses	$ 4,100