Fair Values of Derivative Instruments (Detail) - USD ($) $ in Thousands	Nov. 30, 2016	Aug. 31, 2016
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 764	$ 1,570
Designated as Hedging Instrument | Accounts Payable and Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	13,277	7,444
Designated as Hedging Instrument | Foreign Exchange Contracts | Accounts Receivable
Derivatives, Fair Value [Line Items]
Asset Derivatives	764	1,570
Designated as Hedging Instrument | Foreign Exchange Contracts | Accounts Payable and Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	11,552	4,287
Designated as Hedging Instrument | Interest rate swap contracts | Accounts Payable and Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	1,725	3,157
Not Designated as Hedging Instrument | Foreign Exchange Contracts | Accounts Receivable
Derivatives, Fair Value [Line Items]
Asset Derivatives	2	25
Not Designated as Hedging Instrument | Foreign Exchange Contracts | Accounts Payable and Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 64	$ 22