PROPERTY AND EQUIPMENT (Summary of Property and Equipment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2016	May 31, 2015	Aug. 31, 2015
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	$ 647,280		$ 647,280		$ 598,648
Less: accumulated depreciation	(190,696)		(190,696)		(165,608)
Property and equipment, net	456,584		456,584		433,040
Depreciation and amortization expense	10,271	$ 8,740	29,003	$ 25,173
Land [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	131,073		131,073		128,071
Building and Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	297,569		297,569		278,982
Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	183,858		183,858		164,916
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, historical cost	$ 34,780		$ 34,780		$ 26,679