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Supplementary Balance Sheet Information (Schedule Of Other Long-Term Liabilities) (Details) - USD ($) | Sep. 26, 2015 | Sep. 27, 2014
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Supplementary Balance Sheet Information [Line Items] |  |
Advance payments on purchases contracts | $ 1,704,061 | $ 1,748,818
Deferred lease expense | 1,906,317 | 1,875,776
Nonqualified investment plan liability | 8,866,880 | 8,172,335
Other | 1,484,815 | 1,631,396
Total other long-term liabilities | 35,513,775 | 30,355,536
Less current portion | 952,661 | 1,565,501
Other long-term liabilities, net of current portion | 34,561,114 | 28,790,035
Workers Compensation Insurance [Member] |  |
Supplementary Balance Sheet Information [Line Items] |  |
Self-insurance liabilities | 17,819,587 | 13,283,535
General Liability [Member] |  |
Supplementary Balance Sheet Information [Line Items] |  |
Self-insurance liabilities | $ 3,732,115 | $ 3,643,676

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