Derivative Financial Instruments And Hedging Activities (Changes Related to Cash Flow Hedges Included in AOCI Net of Tax) (Details) (USD $) In Thousands	12 Months Ended
Aug. 31, 2011	Aug. 31, 2010	Aug. 31, 2009
Accumulated comprehensive loss, beginning balance	$ (16,086)
Changes in fair value of derivative instruments	4,260	(1,742)	143
Adjustment for net losses (gains) realized and included in net income related to derivative instruments	(654)	(4,534)	(3,950)
Accumulated comprehensive loss, ending balance	(11,172)	(16,086)
Cash Flow Hedges [Member]
Accumulated comprehensive loss, beginning balance	(16,086)	(18,861)
Changes in fair value of derivative instruments	4,260	(1,759)
Adjustment for net losses (gains) realized and included in net income related to derivative instruments	654	4,534
Accumulated comprehensive loss, ending balance	$ (11,172)	$ (16,086)

Net of tax effect change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges after taxes. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. The change includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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+ Details

- Definition

Net of tax effect of the reclassification adjustment for accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges included in accumulated comprehensive income that was realized in net income during the period.

+ References

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+ Details