Note 12 Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Weighted average shares used in computing per share amount:
Net income (loss)	$ 42,921	$ 33,963	$ 121,758	$ (96,315)
Weighted average common shares outstanding	69,499	68,907	68,872	70,366
Effect of dilutive stock options and restricted stock units	2,508	3,146	2,588	0
Denominator for diluted earnings per share	72,007	72,053	71,460	70,366
Net income (loss) per share:
Basic	$ 0.62	$ 0.49	$ 1.77	$ (1.37)
Diluted	$ 0.60	$ 0.47	$ 1.70	$ (1.37)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount				3,000