Note 4 - Calculation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Net Earnings available to common stockholders	$ 30,872		$ 26,129	$ 68,752	$ 80,211
Weighted average number of shares outstanding, basic (in shares)	18,823	18,698	18,698	18,794	18,683
Earnings per share, basic (in dollars per share)	$ 1.64	$ 1.40	$ 1.40	$ 3.66	$ 4.29
Options	$ 0		$ 0	$ 0	$ 0
Options (in shares)	124		124	118	118
Options (in dollars per share)	$ (0.01)		$ (0.01)	$ (0.02)	$ (0.02)
Net Earnings available to common stockholders plus assumed conversions	$ 30,872		$ 26,129	$ 68,752	$ 80,211
Weighted average number of shares outstanding, diluted (in shares)	18,947	18,822	18,822	18,912	18,801
Earnings per share, diluted (in dollars per share)	$ 1.63	$ 1.39	$ 1.39	$ 3.64	$ 4.27