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Note I - Income Taxes (Details) - Effective Income Tax Rate Reconciliation - USD ($) $ in Thousands	12 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 28, 2013
Effective Income Tax Rate Reconciliation [Abstract]
Income taxes at federal statutory rates	$ 39,172	$ 38,922	$ 35,277
Increase (decrease) in taxes resulting from:
State income taxes, net of federal income tax benefit	4,196	4,281	4,346
Domestic production activities deduction	(2,100)	(2,100)	(1,540)
Reduction of gross unrecognized tax benefits		(161)	(346)
Increase in federal valuation allowance	1,366
Other, net	(898)	(1,550)	(1,328)
Income tax expense	$ 41,736	$ 39,392	$ 36,409

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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