Fair Value of Derivative Instruments Located on Condensed Consolidated Balance Sheets Utilized for Foreign Currency Risk Management Purposes (Detail) (Forward foreign exchange contracts, USD $) In Thousands, unless otherwise specified	May 31, 2012	Aug. 31, 2011
Designated as Hedging Instruments | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Forward foreign exchange contracts, Asset Derivatives	$ 598	$ 2,825
Designated as Hedging Instruments | Other accrued expense
Derivatives, Fair Value [Line Items]
Forward foreign exchange contracts, Liability Derivatives	1,978	2,798
Not Designated as Hedging Instrument | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Forward foreign exchange contracts, Asset Derivatives	8,207	3,517
Not Designated as Hedging Instrument | Other accrued expense
Derivatives, Fair Value [Line Items]
Forward foreign exchange contracts, Liability Derivatives	$ 12,503	$ 3,979