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Supplementary Balance Sheet Information (Schedule Of Other Long-Term Liabilities) (Details) - USD ($) | Sep. 25, 2021 | Sep. 26, 2020
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Supplementary Balance Sheet Information [Line Items] |  |
Advance payments on purchases contracts | $ 2,264,784 | $ 2,826,171
Nonqualified investment plan liability | 22,736,980 | 18,049,600
Interest rate swap liability | 4,531,140 | 13,562,296
Other | 3,211,513 | 2,570,453
Other long-term liabilities | 51,532,388 | 57,045,546
Less current portion | 1,113,441 | 1,385,603
Total other long-term liabilities | 50,418,947 | 55,659,943
Workers Compensation Insurance [Member] |  |
Supplementary Balance Sheet Information [Line Items] |  |
Self-insurance liabilities | 14,501,624 | 16,003,064
General Liability [Member] |  |
Supplementary Balance Sheet Information [Line Items] |  |
Self-insurance liabilities | $ 4,286,347 | $ 4,033,962

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