Note 10 Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Weighted average shares used in computing per share amount:
Net income (loss)	$ (154,910)	$ 44,864
Weighted average common shares outstanding	71,605	73,554
Effect of dilutive stock options and restricted stock units	0	3,621
Denominator for diluted earnings per share	71,605	77,175
Net income (loss) per share:
Basic	$ (2.16)	$ 0.61
Diluted	$ (2.16)	$ 0.58
Antidilutive Securities	4,000