Segment Information (Revenue By Geographic Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Mar. 31, 2012		Apr. 02, 2011		Mar. 31, 2012		Apr. 02, 2011
Revenue	$ 301,125		$ 269,189		$ 619,401		$ 535,741
Americas [Member]
Revenue	109,483	[1]	94,399	[1]	226,973	[1]	194,492	[1]
Europe [Member]
Revenue	115,780	[2]	105,955	[2]	248,955	[2]	213,831	[2]
Pacific Rim [Member]
Revenue	37,373		36,208		74,623		69,820
Japan [Member]
Revenue	38,489		32,627		68,850		57,598
United States [Member]
Revenue	102,300		89,900		213,000		185,300
Germany [Member]
Revenue	$ 41,200		$ 38,500		$ 97,400		$ 71,800

[1] Includes revenue in the United States totaling $102.3 million and $89.9 million for the three months ended March 31, 2012 and April 2, 2011, respectively

[2] Includes revenue in Germany totaling $41.2 million and $38.5 million for the three months ended March 31, 2012 and April 2, 2011, respectively