PROPERTY AND EQUIPMENT (Summary of Property and Equipment) (Details) - USD ($) $ in Thousands	Aug. 31, 2020	Aug. 31, 2019
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	$ 1,045,832	$ 979,290
Less: accumulated depreciation	(353,553)	(308,139)
Property and equipment, net	692,279	671,151
Land [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	215,433	207,167
Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	498,964	464,025
Fixtures And Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	287,073	258,543
Construction In Progress [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	$ 44,362	$ 49,555