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Long-Term Debt (Schedule of Long-Term Debt And Short-Term Loans) (Details) - USD ($) | Sep. 30, 2017 | Sep. 24, 2016
--- | --- | ---
Debt Instrument [Line Items] |  |
Less unamortized prepaid loan costs | $ (7,221,134) | $ (8,105,090)
Total long-term debt | 877,870,315 | 876,474,094
Less current portion | 12,210,571 | 10,000,629
Long-term debt, net of current portion | 865,659,744 | 866,473,465
Senior Notes, Interest Rate of 5.75%, Maturing 2023 [Member] |  |
Debt Instrument [Line Items] |  |
Bonds payable | $ 700,000,000 | $ 700,000,000
Interest rate | 5.75% | 5.75%
Recovery Zone Facility Bonds, maturing 2036 [Member] |  |
Debt Instrument [Line Items] |  |
Bonds payable | $ 81,620,000 | $ 86,150,000
Line of Credit Payable [Member] |  |
Debt Instrument [Line Items] |  |
Weighted average interest rate | 4.25% |
Notes Payable Due to Banks, Weighted Average Interest Rate of 3.24% for 2017 and 3.38% for 2016 [Member] |  |
Debt Instrument [Line Items] |  |
Notes payable | $ 103,471,449 | $ 98,429,184
Weighted average interest rate | 3.24% | 3.38%

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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