Note 11 Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Dec. 27, 2014	Dec. 28, 2013
Earnings Per Share [Line Items]
Net income	$ 22,656us-gaap_NetIncomeLoss	$ 23,101us-gaap_NetIncomeLoss
Weighted average shares used in computing per share amount:
Weighted average common shares outstanding	82,548	83,766
Effect of dilutive stock options and restricted stock units	4,134	3,493
Denominator for diluted earnings per share	86,682	87,259
Net income per share:
Basic	$ 0.27us-gaap_EarningsPerShareBasic	$ 0.28us-gaap_EarningsPerShareBasic
Diluted	$ 0.26us-gaap_EarningsPerShareDiluted	$ 0.26us-gaap_EarningsPerShareDiluted
Potentially dilutive securities [Abstract]
Potentially dilutive securities	472	3,268
Employee stock options
Potentially dilutive securities [Abstract]
Potentially dilutive securities	399	3,220
Restricted stock units
Potentially dilutive securities [Abstract]
Potentially dilutive securities	73	48

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