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Note I - Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2017
Sep. 24, 2016
Sep. 26, 2015
Current      
U.S. Federal $ 27,142 $ 25,126 $ 33,348
Foreign 2,770 2,433 2,260
State 5,227 5,622 6,294
Total current expense 35,139 33,181 41,902
Deferred      
U.S. Federal 6,857 6,444 (109)
Foreign (422) (145) (34)
State 1,452 1,364 (23)
Total deferred expense(benefit) 7,887 7,663 (166)
Total expense $ 43,026 $ 40,844 $ 41,736