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Note J - Commitments (Details Textual)
12 Months Ended
Sep. 30, 2017
USD ($)
Sep. 24, 2016
USD ($)
Sep. 26, 2015
USD ($)
Operating Leases, Rent Expense $ 20,354,000 $ 17,481,000 $ 16,448,000
Accrued Insurance 8,100,000 8,200,000  
Letters of Credit Outstanding, Amount $ 8,675,000 8,675,000  
Entity Number of Employees 1,600    
Self Insurance Reserve $ 2,382,000 $ 1,719,000