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Income Taxes (Schedule of Income Tax Expense Reconciliation) (Details) - USD ($)
12 Months Ended
Sep. 30, 2023
Sep. 24, 2022
Sep. 25, 2021
Income Taxes [Abstract]      
Federal tax at statutory rate $ 58,396,000 $ 75,783,000 $ 68,818,000
State income tax, net of federal tax benefits 9,247,000 12,032,000 10,872,000
Federal tax credits (1,449,000) (1,500,000) (1,700,000)
Other 1,499,000 2,196,000 (107,000)
Total expense $ 67,693,000 $ 88,511,000 $ 77,883,000