Effect of Derivative Instruments on Statement of Operations (Detail) (Cash Flow Hedging, USD $)	12 Months Ended
	Aug. 31, 2012	Aug. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) Recognized in OCI on Derivatives (Effective portion)	$ (17)	$ (5,865)
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(6,293)	(1,737)
Loss Recognized on Derivative (Ineffective portion and Amount Excluded from Effectiveness Testing)	1,403	860
Foreign Exchange Forward | Interest and Foreign Exchange
Derivative Instruments, Gain (Loss) [Line Items]
Loss Recognized in Income on Derivative	371	(626)
Foreign Exchange
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) Recognized in OCI on Derivatives (Effective portion)	136	(3,302)
Foreign Exchange | Sales Revenue, Services, Net
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(4,615)	71
Loss Recognized on Derivative (Ineffective portion and Amount Excluded from Effectiveness Testing)	1,403	860
Interest Rate Swap Contract
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) Recognized in OCI on Derivatives (Effective portion)	(153)	(2,563)
Interest Rate Swap Contract | Interest and Foreign Exchange
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	$ (1,678)	$ (1,808)