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Note 7 - Property and Equipment, Intangible Assets and Goodwill (Details) - Property and Equipment (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Aug. 27, 2014
Aug. 28, 2013
Aug. 23, 2013
Note 7 - Property and Equipment, Intangible Assets and Goodwill (Details) - Property and Equipment [Line Items]      
Balance $ 441,919 $ 405,563  
Less accumulated depreciation and amortization (228,427) (215,066)  
Property and equipment, net 213,492 190,497  
Intangible assets, net 24,014 25,517  
Intangible assets, net 19 years 36 days    
Goodwill 1,681 2,169 2,200
Land [Member]
      
Note 7 - Property and Equipment, Intangible Assets and Goodwill (Details) - Property and Equipment [Line Items]      
Balance 69,767 62,191  
Restaurant Equipment and Furnishings [Member] | Minimum [Member]
      
Note 7 - Property and Equipment, Intangible Assets and Goodwill (Details) - Property and Equipment [Line Items]      
Estimated Usefule lives in years description 3    
Restaurant Equipment and Furnishings [Member] | Maximum [Member]
      
Note 7 - Property and Equipment, Intangible Assets and Goodwill (Details) - Property and Equipment [Line Items]      
Estimated Usefule lives in years description 15    
Restaurant Equipment and Furnishings [Member]
      
Note 7 - Property and Equipment, Intangible Assets and Goodwill (Details) - Property and Equipment [Line Items]      
Balance 131,932 116,664  
Building [Member] | Minimum [Member]
      
Note 7 - Property and Equipment, Intangible Assets and Goodwill (Details) - Property and Equipment [Line Items]      
Estimated Usefule lives in years description 20    
Building [Member] | Maximum [Member]
      
Note 7 - Property and Equipment, Intangible Assets and Goodwill (Details) - Property and Equipment [Line Items]      
Estimated Usefule lives in years description 33    
Building [Member]
      
Note 7 - Property and Equipment, Intangible Assets and Goodwill (Details) - Property and Equipment [Line Items]      
Balance 181,535 172,342  
Leaseholds and Leasehold Improvements [Member]
      
Note 7 - Property and Equipment, Intangible Assets and Goodwill (Details) - Property and Equipment [Line Items]      
Balance 40,835 39,108  
Estimated Usefule lives in years description Lesser of lease term or estimated useful life    
Furniture and Fixtures [Member] | Minimum [Member]
      
Note 7 - Property and Equipment, Intangible Assets and Goodwill (Details) - Property and Equipment [Line Items]      
Estimated Usefule lives in years description 3    
Furniture and Fixtures [Member] | Maximum [Member]
      
Note 7 - Property and Equipment, Intangible Assets and Goodwill (Details) - Property and Equipment [Line Items]      
Estimated Usefule lives in years description 10    
Furniture and Fixtures [Member]
      
Note 7 - Property and Equipment, Intangible Assets and Goodwill (Details) - Property and Equipment [Line Items]      
Balance 7,537 7,444  
Construction in Progress [Member]
      
Note 7 - Property and Equipment, Intangible Assets and Goodwill (Details) - Property and Equipment [Line Items]      
Balance 10,313 7,814  
Relating to Property, Plant and Equipment (Member)
      
Note 7 - Property and Equipment, Intangible Assets and Goodwill (Details) - Property and Equipment [Line Items]      
Intangible assets, net 24,014 25,517  
Intangible assets, net 21 years    
Goodwill $ 1,681 $ 2,169