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Summary of Significant Accounting Policies (Details Textual) (USD $)
 12 Months Ended
Sep. 29, 2012
Segment
Banks
Sep. 24, 2011
Sep. 25, 2010
Sep. 26, 2009
Cash and Cash Equivalents [Line Items]        
Demand deposits $ 4,683,410 $ 12,421,250 $ 57,854,587 $ 59,535,848
Income Statement Location [Line Items]        
Other income, net 3,527,065 4,159,445 4,224,412  
Summary of Significant Accounting Policies (Textual) [Abstract]        
Number of Operating Segments 203      
Retained earnings 341,964,231 313,879,289    
Summary of Significant Accounting Policies (Additional Textual) [Abstract]        
Outstanding checks in excess of bank balances 11,400,000 0    
Number of banks 8      
FDIC insurance limit per bank 250,000      
Total depreciation expense 90,600,000 80,400,000 78,000,000  
Capitalized loan and leasehold costs 10,200,000 12,200,000    
Accumulated amortization 25,700,000 21,200,000    
Costs to be amortized over the life of the underlying debt instrument or lease, per year. 4,400,000      
Liability coverage per occurrence for workers compensation 750,000      
Liability coverage for general liability 500,000      
Liability coverage per covered person for medical care benefits 325,000      
Company's self insurance reserves 26,700,000 24,800,000    
Undrawn letters of credit 8,200,000      
Gross unrecognized tax benefits 149,400 149,500    
Maximum tax benefit recognized greater than fifty percent 50.00%      
Accrued for interest and penalties 55,000 200,000    
Advertising and promotion expenses, net of vendor allowances 14,100,000 13,900,000 14,800,000  
Depreciation expense included in costs of goods sold totaled 9,200,000 5,400,000 6,300,000  
Fluid dairy revenues recognition 68.00%      
Vendor allowances applied as a reduction of merchandise costs 114,300,000 109,900,000 105,200,000  
Vendor advertising allowances recorded as a reduction of advertising expense 13,200,000 13,100,000 13,000,000  
Maximum [Member]
        
Summary of Significant Accounting Policies (Textual) [Abstract]        
Expiry date of undrawn letters of credit, End Oct. 31, 2013      
Minimum [Member]
        
Summary of Significant Accounting Policies (Textual) [Abstract]        
Expiry date of undrawn letters of credit, Start Nov. 30, 2012      
Building [Member]
        
Summary of Significant Accounting Policies (Textual) [Abstract]        
Useful life of property, plant and equipment 30 years      
Store, office and warehouse equipment [Member] | Maximum [Member]
        
Summary of Significant Accounting Policies (Textual) [Abstract]        
Useful life of property, plant and equipment 10 years      
Store, office and warehouse equipment [Member] | Minimum [Member]
        
Summary of Significant Accounting Policies (Textual) [Abstract]        
Useful life of property, plant and equipment 3 years      
Transportation equipment [Member] | Maximum [Member]
        
Summary of Significant Accounting Policies (Textual) [Abstract]        
Useful life of property, plant and equipment 5 years      
Transportation equipment [Member] | Minimum [Member]
        
Summary of Significant Accounting Policies (Textual) [Abstract]        
Useful life of property, plant and equipment 3 years      
Leasehold improvements [Member] | Maximum [Member]
        
Summary of Significant Accounting Policies (Textual) [Abstract]        
Useful life of property, plant and equipment 30 years      
Leasehold improvements [Member] | Minimum [Member]
        
Summary of Significant Accounting Policies (Textual) [Abstract]        
Useful life of property, plant and equipment 3 years      
Georgia [Member]
        
Summary of Significant Accounting Policies (Textual) [Abstract]        
Number of Operating Segments 74      
North Carolina [Member]
        
Summary of Significant Accounting Policies (Textual) [Abstract]        
Number of Operating Segments 69      
South Carolina [Member]
        
Summary of Significant Accounting Policies (Textual) [Abstract]        
Number of Operating Segments 36      
Tennessee [Member]
        
Summary of Significant Accounting Policies (Textual) [Abstract]        
Number of Operating Segments 21      
Virginia [Member]
        
Summary of Significant Accounting Policies (Textual) [Abstract]        
Number of Operating Segments 2      
Alabama [Member]
        
Summary of Significant Accounting Policies (Textual) [Abstract]        
Number of Operating Segments 1      
Interest income [Member]
        
Income Statement Location [Line Items]        
Other income, net 0 100,000 800,000  
Demand deposits [Member]
        
Cash and Cash Equivalents [Line Items]        
Demand deposits $ 3,100,000