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Composition Of Certain Financial Statement Captions (Schedule Of Allowance For Doubtful Accounts) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 26, 2025
Sep. 27, 2024
Sep. 29, 2023
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Fiscal Year $ 6,836 $ 10,969 $ 14,405
Charged to Operations 2,434 (2,256) (793)
Deductions (988) (1,877) (2,643)
Balance at End of Fiscal Year $ 8,282 $ 6,836 $ 10,969