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Note 6. Derivative Instruments (Detail)
3 Months Ended
Nov. 30, 2012
USD ($)
Aug. 31, 2012
USD ($)
Nov. 30, 2012
Through The End Of The First Quarter Of Fiscal 2013 [Member]
Net Euro Exposure [Member]
Nov. 30, 2012
Through The End Of The First Quarter Of Fiscal 2013 [Member]
Indian Rupee [Member]
Nov. 30, 2012
Through The End Of The First Quarter Of Fiscal 2014 [Member]
Indian Rupee [Member]
Nov. 30, 2012
Through The End Of The First Quarter Of Fiscal 2015 [Member]
Indian Rupee [Member]
Nov. 30, 2012
Indian Rupee [Member]
USD ($)
Nov. 30, 2012
Indian Rupee [Member]
INR
Nov. 30, 2012
Euro [Member]
USD ($)
Nov. 30, 2012
Euro [Member]
EUR (€)
Percent Of Foreign Exchange Contracts Hedged     50.00% 90.00% 75.00% 50.00%        
Notional Amount of Foreign Currency Fair Value Hedge Derivatives (in Rupees) $ 35,205,000 $ 46,446,000           1,700,000,000    
Foreign Currency Derivatives at Fair Value, Net (in Dollars)             500,000   200,000  
Notional Amount of Foreign Currency Derivative Purchase Contracts (in Euro)                   € 3,800,000