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Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)
12 Months Ended
Aug. 31, 2014
segment
Aug. 31, 2013
segment
Aug. 31, 2012
Summary Of Significant Accounting Policies [Abstract]      
Number of Operating Segments 1    
Number of Reportable Segments 1 2  
Total restricted cash $ 19,900,000    
Restricted cash (current) 13,208,000 11,823,000  
Restricted cash (noncurrent) 6,652,000 6,791,000  
Goodwill impairment 0 0  
Advertising and promotion costs $ 22,400,000 $ 22,400,000 $ 22,600,000