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Income Taxes (Schedule Of Income Tax Expense (Benefit)) (Details) - USD ($)
12 Months Ended
Sep. 30, 2017
Sep. 24, 2016
Sep. 26, 2015
Income Taxes [Abstract]      
Federal, current $ 26,994,000 $ 19,676,000 $ 25,578,000
State, current 4,925,000 3,963,000 7,302,000
Total current 31,919,000 23,639,000 32,880,000
Federal, deferred (1,104,000) 6,828,000 2,373,000
State, deferred (427,000) (22,000) (148,000)
Total deferred (1,531,000) 6,806,000 2,225,000
Income tax expense $ 30,388,000 $ 30,445,000 $ 35,105,000