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Accrued Expenses And Current Portion Of Other Long-Term Liabilities (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Dec. 24, 2022
Dec. 25, 2021
Sep. 24, 2022
Accrued Expenses And Current Portion Of Other Long-Term Liabilities [Abstract]      
Workers' compensation per occurrence covered under insurance cost $ 1,000    
Medical care benefits per person covered under insurance cost 475    
Self insurance liabilities 31,100 $ 31,100 $ 31,000
Self insurance liabilities, current 12,900   13,200
Self insurance liabilities, noncurrent 18,200   17,800
Receivable for expected self-insurance recoveries from excess cost insurance 4,100   $ 4,000
Employee insurance expense $ 10,800 $ 13,400