Note 9 Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Sep. 27, 2014
Earnings Per Share [Line Items]
Net income	$ 187,838	$ 377,261	$ 197,165
Potentially dilutive securities	480	789	2,614
Weighted average shares used in computing per share amount:
Weighted average common shares outstanding	75,094	81,818	82,872
Effect of dilutive stock options and restricted stock units	3,693	3,823	3,859
Denominator for diluted earnings per share	78,787	85,641	86,731
Net income per share:
Basic	$ 2.50	$ 4.61	$ 2.38
Diluted	$ 2.38	$ 4.41	$ 2.27
Employee stock options
Earnings Per Share [Line Items]
Potentially dilutive securities	477	776	2,502
Restricted stock units
Earnings Per Share [Line Items]
Potentially dilutive securities	3	13	112