GOODWILL AND OTHER INTANGIBLES (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019	Aug. 31, 2019	Nov. 05, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Gross carrying amounts of the intangible assets subject to amortization	$ 20,700		$ 20,700		$ 20,800
Net carrying amount of intangible assets subject to amortization	12,200		12,200		13,300
Amortization expense for intangible assets	600	$ 600	1,100	$ 1,100
Acquired unfavorable contract backlog	(21,008)		(21,008)		$ (35,360)	$ (110,200)
Amortization of acquired unfavorable contract backlog	$ (5,997)	$ (23,476)	$ (14,328)	$ (34,808)