Goodwill And Other Intangible Assets (Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	Aug. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 42,925	$ 44,275
Accumulated Amortization	23,004	19,085
Net	19,921	25,190
Customer base
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	33,625	33,928
Accumulated Amortization	21,408	17,133
Net	12,217	16,795
Favorable land leases
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,257	6,133
Accumulated Amortization	612	527
Net	5,645	5,606
Brand name
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,942	4,113
Accumulated Amortization	946	1,394
Net	1,996	2,719
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	101	101
Accumulated Amortization	38	31
Net	$ 63	$ 70