Note 10 Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Apr. 02, 2016	Mar. 28, 2015
Earnings Per Share [Line Items]
Net income	$ 30,361	$ 14,748	$ 57,499	$ 37,404
Weighted average shares used in computing per share amount:
Weighted average common shares outstanding	75,477	82,977	76,605	82,762
Effect of dilutive stock options and restricted stock units	3,048	3,920	3,135	4,035
Denominator for diluted earnings per share	78,525	86,897	79,740	86,797
Net income per share:
Basic	$ 0.40	$ 0.18	$ 0.75	$ 0.45
Diluted	$ 0.39	$ 0.17	$ 0.72	$ 0.43
Potentially dilutive securities [Abstract]
Potentially dilutive securities	1,595	847	1,554	633
Employee stock options
Potentially dilutive securities [Abstract]
Potentially dilutive securities	1,531	602	1,550	474
Restricted stock units
Potentially dilutive securities [Abstract]
Potentially dilutive securities	64	245	4	159