PROPERTY AND EQUIPMENT (Narrative) (Details) - USD ($)	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Property, Plant and Equipment [Line Items]
Accounts payable	$ 373,172,000	$ 286,219,000
Other accrued expenses	37,731,000	32,442,000
Other long-term liabilities	12,182,000	8,685,000
Construction In Progress [Member]
Property, Plant and Equipment [Line Items]
Accounts payable	2,200,000	322,000
Other accrued expenses	7,300,000	6,300,000
Other long-term liabilities	$ 1,000,000.0	$ 0
Minimum [Member] | Fixtures And Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful life	3 years
Minimum [Member] | Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Useful life	10 years
Maximum [Member] | Fixtures And Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful life	15 years
Maximum [Member] | Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Useful life	25 years