Note I - Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($)	12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 24, 2016
Income taxes at federal statutory rates	$ 28,947,000	$ 42,770,000	$ 40,887,000
State income taxes, net of federal income tax benefit	7,212,000	4,341,000	4,541,000
Domestic production activities deduction	(1,470,000)	(1,820,000)	(2,100,000)
Impact of rate change due to Tax Cuts and Jobs Act	(20,670,000)
Impact of rate differential-current and deferred	(1,236,000)
One-time repatriation tax	1,200,000
Increase in gross unrecognized tax benefits	20,000	20,000	20,000
Share based compensation	(696,000)	(1,923,000)	(1,109,000)
Non deductible employee compensation	514,000
Other, net	735,000	(362,000)	(1,395,000)
Total expense	$ 14,556,000	$ 43,026,000	$ 40,844,000