Goodwill and Intangible Assets (Schedule Of Intangible Assets Subject To Amortization) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Mar. 30, 2012 Y	Sep. 30, 2011
Finite-Lived Intangible Assets [Line Items]
Total intangible assets, Gross Carrying Amount	$ 175,695	$ 135,935
Total intangible assets, Accumulated Amortization	(64,592)	(49,127)
Total intangible assets, Net Carrying Amount	111,103	86,808
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets, Weighted Average Amortization Period Remaining (Years)	3.2
Amortized intangible assets, Gross Carrying Amount	87,066	70,046
Amortized intangible assets, Accumulated Amortization	(34,706)	(27,039)
Amortized intangible assets, Net Carrying Amount	52,360	43,007
In-Process Research and Development [Member]
Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets, Gross Carrying Amount	6,050	4,510
Amortized intangible assets, Accumulated Amortization	(1,314)	(260)
Amortized intangible assets, Net Carrying Amount	4,736	4,250
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets, Weighted Average Amortization Period Remaining (Years)	3.4
Amortized intangible assets, Gross Carrying Amount	78,710	57,510
Amortized intangible assets, Accumulated Amortization	(28,572)	(21,828)
Amortized intangible assets, Net Carrying Amount	50,138	35,682
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Indefinite-Lived Trademarks	3,869	3,869
Nonamortizing intangible assets, Gross Carrying Amount	3,869	3,869
Total intangible assets, Accumulated Amortization	$ 0	$ 0