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Long-Term Debt (Schedule Of Components Of Interest Costs) (Details) - USD ($)
12 Months Ended
Sep. 30, 2017
Sep. 24, 2016
Sep. 26, 2015
Long-Term Debt [Abstract]      
Total interest costs $ 48,675,895 $ 47,807,738 $ 47,378,270
Interest capitalized (1,217,862) (1,477,434) (371,496)
Interest expense $ 47,458,033 $ 46,330,304 $ 47,006,774