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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, 2018
Nov. 30, 2017
Segment Reporting [Abstract]    
Earnings from continuing operations $ 19,420 $ 31,871
Interest expense 16,663 6,611
Income taxes 5,609 8,425
Depreciation and amortization 35,176 31,899
Amortization of acquired unfavorable contract backlog (11,332) 0
Impairment of assets 0 461
Adjusted EBITDA from continuing operations $ 65,536 $ 79,267