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Operating Leases (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Aug. 31, 2015
Aug. 31, 2014
Aug. 31, 2013
Operating Leased Assets [Line Items]      
Total rent expense $ 2.3 $ 2.2 $ 2.2
Cost basis of office space available for lease 36.2    
Carrying value of office space available for lease 10.3    
Sublease payments made to the Company $ 4.4 $ 3.9 $ 4.2
Minimum [Member]      
Operating Leased Assets [Line Items]      
Operating lease term   1 year  
Maximum [Member]      
Operating Leased Assets [Line Items]      
Operating lease term 6 years    
FC Organizational Products [Member]      
Operating Leased Assets [Line Items]      
Lease income $ 1.3