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Intangible Assets And Goodwill (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2011
Intangible Assets And Goodwill [Abstract]
Duration of contingent payments from CoveyLink Acquisition	5 years
Payments for acquisition earnout	$ 2.2
Aggregate amortization expense from definite-lived intangible assets	$ 3.2	$ 2.5	$ 3.5

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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