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Income Taxes (Schedule Of Income Tax Expense Reconciliation) (Details) - USD ($)
12 Months Ended
Sep. 25, 2021
Sep. 26, 2020
Sep. 28, 2019
Income Taxes [Abstract]      
Federal tax at statutory rate $ 68,818,000 $ 49,359,000 $ 22,386,000
State income tax, net of federal tax benefits 10,872,000 7,825,000 3,726,000
Federal tax credits (1,700,000) (513,000) (1,184,000)
Other (107,000) (228,000) 90,000
Total expense $ 77,883,000 $ 56,443,000 $ 25,018,000