Note 4 - Calculation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 24, 2017	Jun. 25, 2016	Jun. 24, 2017	Jun. 25, 2016
Weighted average number of shares outstanding, diluted (in shares)	18,846	18,705	18,818	18,765
Earnings per share, diluted (in dollars per share)	$ 1.34	$ 1.43	$ 2.91	$ 2.95
Net Earnings available to common stockholders	$ 25,304	$ 26,791	$ 54,831	$ 55,357
Weighted average number of shares outstanding, basic (in shares)	18,727	18,615	18,708	18,646
Earnings per share, basic (in dollars per share)	$ 1.35	$ 1.44	$ 2.93	$ 2.97
Options	$ 0	$ 0	$ 0	$ 0
Options (in shares)	119	90	110	119
Options (in dollars per share)	$ (0.01)	$ (0.01)	$ (0.02)	$ (0.02)
Net Earnings available to common stockholders plus assumed conversions	$ 25,304	$ 26,791	$ 54,831	$ 55,357