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BUSINESS SEGMENTS (Reconciliations of Earnings from Continuing Operations to Adjusted Operating Profit) (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2020	Nov. 30, 2019
Segment Reporting [Abstract]
Earnings from continuing operations	$ 63,911	$ 82,755
Interest expense	14,259	16,578
Income taxes	21,593	27,332
Depreciation and amortization	41,799	40,941
Asset impairments	3,594	530
Amortization of acquired unfavorable contract backlog	(1,523)	(8,331)
Adjusted EBITDA from continuing operations	$ 143,633	$ 159,805

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