Note 6. Derivative Instruments (Detail) - Hedging Positions and Corresponding Fair Values (USD $) In Thousands, unless otherwise specified	Feb. 29, 2012	Aug. 31, 2011
Gross Notional Value	$ 16,500	$ 8,618
Fair Value Asset (Liability)	(795)	897
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)
Indian Rupee [Member]
Gross Notional Value	16,500	0
Fair Value Asset (Liability)	$ (795)	$ 0