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Income Taxes (Details) (USD $)
Sep. 29, 2012
Sep. 24, 2011
Deferred tax liabilities:    
Property and equipment tax/book differences $ 86,915,000 $ 70,435,000
Property tax method 1,441,000 1,359,000
Total deferred tax liabilities 88,356,000 71,794,000
Deferred tax assets:    
Insurance reserves 7,927,000 7,469,000
Advance payments on purchases contracts 699,000 389,000
Vacation accrual 2,420,000 2,331,000
Closed store accrual 197,000 513,000
Inventory 1,836,000 638,000
Deferred compensation 2,220,000 1,739,000
Other 1,722,000 1,582,000
Total deferred tax assets 17,021,000 14,661,000
Net deferred tax liabilities $ 71,335,000 $ 57,133,000