PROPERTY AND EQUIPMENT (Summary of Property and Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2014
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	$ 670,586	$ 598,648
Less: accumulated depreciation	(197,541)	(165,608)
Property and equipment, net	473,045	433,040
Depreciation and amortization expense	39,794	34,445	$ 28,475
Land [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	131,896	128,071
Building and Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	305,420	278,982
Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	186,409	164,916
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	$ 46,861	$ 26,679