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Acquisitions (Schedule Of Estimated Fair Value Of The Assets Acquired And Liabilities Assumed In Business Acquisition) (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2012	Aug. 16, 2013 CLC [Member]
Business Acquisition [Line Items]
Current assets				$ 8,656
Property and equipment				7,867
Intangible assets				13,600
Other long-term assets				738
Current liabilities				(1,808)
Long-term debt				(1,400)
Other long-term liabilities				(5,500)
Total identifiable net assets acquired				22,153
Goodwill	37,021	37,414	29,961	6,854
Total				$ 29,007