Fair Value of Derivative Instruments Located on Consolidated Balance Sheets Utilized for Foreign Currency Risk Management Purposes (Detail) (Forward foreign exchange contracts, USD $) In Thousands, unless otherwise specified	Aug. 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	$ 1,335	$ 2,825
Designated as Hedging Instruments | Other accrued expense
Derivatives, Fair Value [Line Items]
Forward foreign exchange contracts, Liability Derivatives	1,190	2,798
Not Designated as Hedging Instrument | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Forward foreign exchange contracts, Asset Derivatives	4,445	3,517
Not Designated as Hedging Instrument | Other accrued expense
Derivatives, Fair Value [Line Items]
Forward foreign exchange contracts, Liability Derivatives	$ 2,976	$ 3,979