Note 6. Derivative Instruments (Detail) - Hedging Positions and Corresponding Fair Values (USD $) In Thousands, unless otherwise specified	Nov. 30, 2011	Aug. 31, 2011
Gross Notional Value	$ 22,275	$ 8,618
Fair Value Asset (Liability)	(2,442)	897
Indian Rupee [Member]
Gross Notional Value	22,275	0
Fair Value Asset (Liability)	(2,442)	0
Euro [Member]
Gross Notional Value	0	8,422
Fair Value Asset (Liability)	0	916
British Pound Sterling [Member]
Gross Notional Value	0	0
Fair Value Asset (Liability)	0	0
Japanese Yen [Member]
Gross Notional Value	0	196
Fair Value Asset (Liability)	$ 0	$ (19)