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Income Taxes (Schedule Of Deferred Income Tax Liabilities And Assets) (Details) - USD ($) | Sep. 29, 2018 | Sep. 30, 2017
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Income Taxes [Abstract] |  |
Property and equipment tax/book differences | $ 87,577,000 | $ 89,089,000
Property tax method | 1,156,000 | 1,575,000
Total deferred tax liabilities | 88,733,000 | 90,664,000
Insurance reserves | 4,790,000 | 7,872,000
Advance payments on purchases contracts | 761,000 | 1,207,000
Vacation accrual | 1,652,000 | 2,471,000
State tax credits |  | 4,000
Inventory | 1,055,000 | 1,555,000
Deferred compensation | 3,662,000 | 5,032,000
Other | 2,352,000 | 2,605,000
Total deferred tax assets | 14,272,000 | 20,746,000
Net deferred tax liabilities | $ 74,461,000 | $ 69,918,000

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