Note 11 Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 29, 2014	Mar. 30, 2013
Earnings Per Share [Line Items]
Net income	$ 20,840	$ 21,191	$ 43,941	$ 21,812
Weighted average shares used in computing per share amount:
Weighted average common shares outstanding	82,728	82,543	83,247	82,226
Effect of dilutive stock options and restricted stock units	3,416	2,140	3,476	2,143
Denominator for diluted earnings per share	86,144	84,683	86,723	84,369
Net income per share:
Basic	$ 0.25	$ 0.26	$ 0.53	$ 0.27
Diluted	$ 0.24	$ 0.25	$ 0.51	$ 0.26
Potentially dilutive securities [Abstract]
Potentially dilutive securities	3,288	7,620	3,248	8,534
Employee stock options
Potentially dilutive securities [Abstract]
Potentially dilutive securities	3,285	7,614	3,247	8,529
Restricted stock units
Potentially dilutive securities [Abstract]
Potentially dilutive securities	3	6	1	5