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Income Taxes (Details 1) (USD $)	12 Months Ended
	Sep. 29, 2012	Sep. 24, 2011	Sep. 25, 2010
Income Tax Expense
Federal tax at statutory rate	$ 23,572,000	$ 21,249,000	$ 17,086,000
State income tax, net of federal tax benefits	1,943,000	2,145,000	2,629,000
Federal tax credits	(1,209,000)	(1,824,000)	(1,480,000)
Other	(403,000)	81,000	(260,000)
Total Income tax expense	$ 23,903,000	$ 21,651,000	$ 17,975,000

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