Note 9 Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Apr. 02, 2011	Mar. 31, 2012	Apr. 02, 2011
Earnings Per Share [Line Items]
Net income	$ (1,439)	$ 13,065	$ 7,136	$ 41,424
Weighted Average Number of Shares Outstanding, Basic	81,225	80,242	81,059	80,044
Weighted Average Number of Shares Outstanding, Diluted	81,225	83,940	83,511	83,338
Net Income Per Share, Basic	$ (0.02)	$ 0.16	$ 0.09	$ 0.52
Net Income Per Share, Diluted	$ (0.02)	$ 0.16	$ 0.09	$ 0.50
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (Number in Shares)	13,589	5,095	7,943	4,861
Stock Options [Member]
Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (Number in Shares)	11,391	4,914	7,583	4,741
Restricted Stock Units (RSUs) [Member]
Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (Number in Shares)	2,198	181	360	120