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Acquisition of Business (Narrative) (Details)
12 Months Ended
Aug. 31, 2015
USD ($)
Dec. 27, 2014
entity
Dec. 28, 2013
entity
Business Acquisition [Line Items]      
Number of Businesses Acquired | entity   0 0
C&S Wholesale Grocers [Member]      
Business Acquisition [Line Items]      
Purchase price $ 7,900,000    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Land 1,900,000    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Building 5,900,000    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Equipment 112,000    
Goodwill recognized $ 0