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Financial Derivatives (Narrative) (Details)	12 Months Ended			12 Months Ended
	Aug. 31, 2013 USD ($)	Aug. 31, 2012 USD ($)	Aug. 31, 2013 Cash Flow Hedging [Member]	Aug. 31, 2013 Net Investment Hedging [Member] USD ($)	Aug. 31, 2012 Net Investment Hedging [Member] USD ($)	Aug. 31, 2011 Net Investment Hedging [Member] USD ($)	Aug. 31, 2013 Net Investment Hedging [Member] EUR (€)	Aug. 31, 2013 Net Investment Hedging [Member] ZAR	Aug. 31, 2012 Net Investment Hedging [Member] EUR (€)
Derivatives, Fair Value [Line Items]
Realized and unrealized gains, net of related income tax effects	$ 2,000,000	$ 2,400,000
Fixed interest rate			6.05%
Foreign currency translation forward contracts resulting in an after-tax net (losses) gains				(600,000)	1,800,000	(700,000)
Accumulated currency translation adjustments in AOCI, after-tax gains	(29,000)	1,723,000		2,000,000	2,400,000	700,000
Outstanding foreign currency forward contracts to sell							€ 29,200,000	43,000,000	€ 26,500,000

X

- Definition

The effective portion of gain or loss included in accumulated other comprehensive income on derivative instruments designated and qualifying as hedging instruments.

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Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

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- Definition

Fixed interest rate related to the interest rate derivative.

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Aggregate notional amount of foreign currency derivatives to sell a foreign currency. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

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Net of tax amount of the income statement impact of the reclassification adjustment for translation gain (loss) realized upon the sale or complete or substantially complete liquidation of an investment in a foreign entity. Also includes reclassification adjustments on foreign currency hedges that are designated and qualified as hedging instruments for hedges of the foreign currency exposure of a net investment in a foreign operation.

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