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Goodwill And Other Intangible Assets (Narrative)(Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2012	Aug. 31, 2011	Aug. 31, 2010
Goodwill And Intangible Assets [Abstract]
Amortization of Intangible Assets	$ 2,900	$ 2,800	$ 2,600
Weighted average life	11 years 3 months 18 days

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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