GOODWILL AND OTHER INTANGIBLE ASSETS (Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 53,835	$ 42,925
Accumulated Amortization	29,601	23,004
Net	24,234	19,921
Customer base
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	38,078	33,625
Accumulated Amortization	25,989	21,408
Net	12,089	12,217
Favorable land leases
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,661	6,257
Accumulated Amortization	2,075	612
Net	9,586	5,645
Brand name
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,216	2,942
Accumulated Amortization	1,452	946
Net	1,764	1,996
Non-competition agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	779	0
Accumulated Amortization	40	0
Net	739	0
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	101	101
Accumulated Amortization	45	38
Net	$ 56	$ 63