Note 6. Derivative Instruments (Detail) - Derivatives in Cash Flow Hedging Relationships (USD $) In Thousands, unless otherwise specified	3 Months Ended
Nov. 30, 2011	Nov. 30, 2010
Foreign currency forward contracts	$ (1,596)	$ 1,469
Foreign currency forward contracts	$ 520	$ 444

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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