Note 5 - Derivative Instruments (Details) - Fair Value Amounts of Derivative Instruments and Gains (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	Aug. 31, 2012
Accounts Payable and Accrued Liabilities [Member]
Note 5 - Derivative Instruments (Details) - Fair Value Amounts of Derivative Instruments and Gains [Line Items]
Derivatives designated as hedging instruments	$ 3,085	$ 2,374
Deferred Rent and Other Non-current Liabilities [Member]
Note 5 - Derivative Instruments (Details) - Fair Value Amounts of Derivative Instruments and Gains [Line Items]
Derivatives designated as hedging instruments	$ 4,655