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Income Taxes (Schedule Of Deferred Income Tax Liabilities And Assets) (Details) - USD ($) | Sep. 26, 2015 | Sep. 27, 2014
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Income Taxes [Abstract] |  |
Property and equipment tax/book differences | $ 82,199,000 | $ 79,861,000
Property tax method | 1,491,000 | 1,418,000
Total deferred tax liabilities | 83,690,000 | 81,279,000
Insurance reserves | 8,607,000 | 8,360,000
Advance payments on purchases contracts | 652,000 | 676,000
Vacation accrual | 2,386,000 | 2,603,000
State tax credits | 271,000 | 604,000
Inventory | 1,939,000 | 1,917,000
Deferred compensation | 3,390,000 | 3,157,000
Other | 1,802,000 | 1,544,000
Total deferred tax assets | 19,047,000 | 18,861,000
Net deferred tax liabilities | $ 64,643,000 | $ 62,418,000

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