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Indebtedness (Narrative) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Sep. 28, 2012
Sep. 30, 2011
Oct. 01, 2010
Nov. 30, 2012
Indebtedness [Line Items]        
Interest Paid $ 1,150 $ 1,919 $ 2,537  
Weighted Average Borrowing Rate for Short-Term Debt 2.60% 3.40% 5.30%  
Long-Term Debt, Fair Value 8,860 14,972    
Johnson Family Voting Power from Common Stock Owned       77.00%
Revolvers [Member]
        
Indebtedness [Line Items]        
Initiation Date Nov. 16, 2010      
Expiration Date Nov. 16, 2014      
Interest Rate at Period End 2.50%      
Remaining Borrowing Capacity 28,100      
Revolvers Borrowing Capacity Standard [Member]
        
Indebtedness [Line Items]        
Maximum Borrowing Capacity 75,000      
Revolvers Borrowing Capacity Annual Pay Down [Member]
        
Indebtedness [Line Items]        
Maximum Borrowing Capacity 30,000      
Annual Seasonal Pay Down Duration 60 days      
Term Loans [Member]
        
Indebtedness [Line Items]        
Pre-Payment Penalty 8.00%      
Annual Decrease of Pre-Payment Penalty 1.00%      
Interest Rate at Period End 5.25%      
Financial Standby Letter of Credit [Member]
        
Indebtedness [Line Items]        
Letters of Credit Outstanding $ 1,401 $ 2,103    
Class A [Member]
        
Indebtedness [Line Items]        
Common Stock Owned by Johnson Family, Shares       3,775,826
Common Stock Owned by Johnson Family, Percent       44.00%
Class B [Member]
        
Indebtedness [Line Items]        
Common Stock Owned by Johnson Family, Shares       1,211,196
Common Stock Owned by Johnson Family, Percent       100.00%