Note 13 Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018
Earnings Per Share [Line Items]
Net income (loss)	$ 139,713	$ 141,515	$ (95,533)
Weighted average shares used in computing per share amount:
Weighted average common shares outstanding	69,041	69,129	69,833
Effect of dilutive stock options and restricted stock units	1,752	2,549	0
Denominator for diluted earnings per share	70,793	71,678	69,833
Net income (loss) per share:
Basic	$ 2.02	$ 2.05	$ (1.37)
Diluted	$ 1.97	$ 1.97	$ (1.37)