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Income Taxes (Schedule Of Current And Deferred Income Tax Expense (Benefit)) (Details) - USD ($)
 12 Months Ended
Sep. 25, 2021
Sep. 26, 2020
Sep. 28, 2019
Income Taxes [Abstract]      
Federal, current $ 66,526,000 $ 45,261,000 $ 18,774,000
State, current 14,129,000 10,445,000 4,797,000
Total current 80,655,000 55,706,000 23,571,000
Federal, deferred (2,482,000) 1,163,000 1,510,000
State, deferred (290,000) (426,000) (63,000)
Total deferred (2,772,000) 737,000 1,447,000
Total expense $ 77,883,000 $ 56,443,000 $ 25,018,000