Note 11 Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 29, 2012
Earnings Per Share [Line Items]
Net income	$ 197,165	$ 79,351	$ 180,234
Potentially dilutive securities	2,614	6,634	8,306
Weighted average shares used in computing per share amount:
Weighted average common shares outstanding	82,872	82,834	81,284
Effect of dilutive stock options and restricted stock units	3,859	2,569	2,211
Denominator for diluted earnings per share	86,731	85,403	83,495
Net income per share:
Basic	$ 2.38	$ 0.96	$ 2.22
Diluted	$ 2.27	$ 0.93	$ 2.16
Stock Options
Earnings Per Share [Line Items]
Potentially dilutive securities	2,502	6,634	7,937
Restricted stock units
Earnings Per Share [Line Items]
Potentially dilutive securities	112	0	369