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Accrued Expenses And Current Portion Of Other Long-Term Liabilities (Narrative) (Details) - USD ($)
 3 Months Ended 9 Months Ended
Jun. 27, 2015
Jun. 28, 2014
Jun. 27, 2015
Jun. 28, 2014
Accrued Expenses And Current Portion Of Other Long-Term Liabilities [Abstract]        
Workers' compensation per occurrence covered under insurance cost $ 750,000   $ 750,000  
General liability 500,000   500,000  
Medical care benefits per person covered under insurance cost 325,000   325,000  
Self insurance reserves 35,700,000   35,700,000  
Receivable for expected self-insurance recoveries from excess cost insurance 4,600,000   4,600,000  
Employee insurance expense 9,600,000 $ 8,000,000 26,000,000 $ 20,000,000
Self insurance reserves, current 14,400,000   14,400,000  
Self insurance reserves, noncurrent $ 21,300,000   $ 21,300,000