Note 6. Derivative Instruments (Detail) - Fair Value Amounts of Derivative Instruments and Gains (USD $) In Thousands, unless otherwise specified	Nov. 30, 2011	Aug. 31, 2011
	$ 0	$ 897
	2,442	0
Derivatives not designated as hedging instruments	0	0
	(2,442)	897
Accounts Payable And Accrued Expenses [Member] | Derivatives Designated As Hedging Instruments [Member]
Derivative liabilities	2,442	0
Deferred Rent And Other Non-current Liabilities [Member] | Derivatives Designated As Hedging Instruments [Member]
Derivative liabilities	$ 0	$ 0