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Note 10 Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Oct. 03, 2015
Sep. 27, 2014
Sep. 28, 2013
Earnings Per Share [Line Items]      
Net income $ 377,261 $ 197,165 $ 79,351
Potentially dilutive securities 789 2,614 6,634
Weighted average shares used in computing per share amount:      
Weighted average common shares outstanding 81,818 82,872 82,834
Effect of dilutive stock options and restricted stock units 3,823 3,859 2,569
Denominator for diluted earnings per share 85,641 86,731 85,403
Net income per share:      
Basic $ 4.61 $ 2.38 $ 0.96
Diluted $ 4.41 $ 2.27 $ 0.93
Employee stock options      
Earnings Per Share [Line Items]      
Potentially dilutive securities 776 2,502 6,634
Restricted stock units      
Earnings Per Share [Line Items]      
Potentially dilutive securities 13 112 0