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Related Party Transactions (Schedule Of Estimated Fair Values Of Assets Acquired) (Details) - USD ($)
$ in Thousands
Aug. 31, 2016
Aug. 31, 2015
Aug. 31, 2014
Business Acquisition [Line Items]      
Goodwill $ 19,903 $ 19,903 $ 19,641
Red Tree, Inc [Member]      
Business Acquisition [Line Items]      
Inventory   7  
Intangible assets   405  
Goodwill   50  
Cash paid   $ 462