Share Based Compensation (Summary Of Share Based Compensation Additional Information) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2011
Share Based Compensation [Abstract]
Intrinsic value of stock options exercised	$ 4,960	$ 971	$ 7,001
Cash received from stock options exercises	2,036	567	3,579
Tax benefit realized from stock option exercises	$ 1,817	$ 368	$ 2,628
Aggregate grant-date fair value of stock options vested	$ 31.04		$ 8.13

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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+ Details