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Note 17 - Commitments and Contingencies (Details) (USD $)
12 Months Ended
Aug. 31, 2014
Aug. 31, 2013
Aug. 31, 2012
Note 17 - Commitments and Contingencies (Details) [Line Items]      
Operating Leases, Rent Expense $ 37,700,000 $ 36,200,000 $ 34,600,000
Other Liabilities, Noncurrent 16,417,000 22,334,000  
Operating Leases, Future Minimum Payments Due 206,189,000    
Long-term Purchase Commitment, Amount 53,300,000 50.2  
Deferred Rent [Member]
     
Note 17 - Commitments and Contingencies (Details) [Line Items]      
Other Liabilities 18,300,000 19,600,000  
Other Liabilities, Noncurrent 14,900,000 16,100,000  
Standby Letters of Credit [Member]
     
Note 17 - Commitments and Contingencies (Details) [Line Items]      
Long-term Line of Credit 1,800,000    
Norwalk, Connecticut [Member]
     
Note 17 - Commitments and Contingencies (Details) [Line Items]      
Area of Real Estate Property (in Square Feet) 193,000    
Lease Agreement, February 2014 [Member]
     
Note 17 - Commitments and Contingencies (Details) [Line Items]      
Operating Leases, Future Minimum Payments Due $ 93,700,000    
Lessee Leasing Arrangements, Operating Leases, Term of Contract 15 years    
Additional Lease Commitments Assumed with Revere and Matrix Acqusitions [Member]
     
Note 17 - Commitments and Contingencies (Details) [Line Items]      
Area of Real Estate Property (in Square Feet) 11,000