GOODWILL AND OTHER INTANGIBLE ASSETS (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018	Nov. 05, 2018
Acquired unfavorable contract backlog	$ 6,035	$ 35,360		$ 110,200
Amortization of acquired unfavorable contract backlog	29,367	74,784	$ 0
Amortization expense for intangible assets	$ 2,100	$ 2,200	$ 2,200
Perpetual lease rights
Weighted average remaining useful lives	85 years
Minimum
Weighted average remaining useful lives	3 years
Maximum
Weighted average remaining useful lives	15 years

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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