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Note I - Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 26, 2015
Income taxes at federal statutory rates	$ 42,770	$ 40,887	$ 39,172
State income taxes, net of federal income tax benefit	4,341	4,541	4,196
Domestic production activities deduction	(1,820)	(2,100)	(2,100)
Increase in gross unrecognized tax benefits	20	20	39
(Decrease) increase in federal valuation allowance	(6)	240	1,366
Share based compensation	(1,923)	(1,109)	308
Other, net	(356)	(1,635)	(1,245)
Income tax expense	$ 43,026	$ 40,844	$ 41,736

X

- Definition

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

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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