Goodwill And Intangible Assets (Schedule Of Intangible Assets Subject To Amortization) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended
	Dec. 30, 2011	Sep. 30, 2011	Sep. 30, 2011 Developed Technology [Member] years	Dec. 30, 2011 Developed Technology [Member]	Sep. 30, 2011 Customer Relationships [Member] years	Dec. 30, 2011 Customer Relationships [Member]	Sep. 30, 2011 Patents and Other [Member] years	Dec. 30, 2011 Patents and Other [Member]	Dec. 30, 2011 Trademarks [Member]	Sep. 30, 2011 Trademarks [Member]
Future Amortization Expense, Year One	$ 19,278
Amortized intangible assets, Weighted Average Amortization Period Remaining (Years)			1.6		3.7		4.2
Amortized intangible assets, Gross Carrying Amount			20,660	20,660	57,510	57,510	53,896	53,416
Amortized intangible assets, Accumulated Amortization			(13,751)	(14,672)	(21,828)	(24,698)	(13,548)	(15,883)
Amortized intangible assets, Net Carrying Amount			6,909	5,988	35,682	32,812	40,348	37,533
Indefinite-Lived Trademarks									3,869	3,869
Nonamortizing intangible assets, Gross Carrying Amount									3,869	3,869
Total intangible assets, Gross Carrying Amount	135,455	135,935
Total intangible assets, Accumulated Amortization	(55,253)	(49,127)							0	0
Total intangible assets, Net Carrying Amount	$ 80,202	$ 86,808