Note 10 Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014
Earnings Per Share [Line Items]
Net income	$ 24,475	$ 20,721	$ 61,879	$ 64,662
Weighted average shares used in computing per share amount:
Weighted average common shares outstanding	81,700	82,467	82,357	82,988
Effect of dilutive stock options and restricted stock units	3,793	3,768	3,951	3,609
Denominator for diluted earnings per share	85,493	86,235	86,308	86,597
Net income per share:
Basic	$ 0.30	$ 0.25	$ 0.75	$ 0.78
Diluted	$ 0.29	$ 0.24	$ 0.72	$ 0.75
Potentially dilutive securities [Abstract]
Potentially dilutive securities	631	2,630	515	3,110
Employee stock options
Potentially dilutive securities [Abstract]
Potentially dilutive securities	622	2,522	504	3,074
Restricted stock units
Potentially dilutive securities [Abstract]
Potentially dilutive securities	9	108	11	36