PROPERTY AND EQUIPMENT (Summary of Property and Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2017
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	$ 979,290	$ 864,173
Less: accumulated depreciation	(308,139)	(269,770)
Property and equipment, net	671,151	594,403
Depreciation and amortization expense, Property and equipment	52,554	51,520	$ 46,292
Land [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	207,167	172,051
Building And Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	464,025	424,736
Fixtures And Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	258,543	228,891
Construction In Progress [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	$ 49,555	$ 38,495