Segment Information (Revenue by Geographic Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Mar. 30, 2013		Mar. 31, 2012		Mar. 30, 2013		Mar. 31, 2012
Revenue	$ 313,949		$ 301,125		$ 633,700		$ 619,401
Americas (1)
Revenue	118,150	[1]	109,529	[1]	250,809	[1]	227,019	[1]
Europe (2)
Revenue	118,841	[2]	115,780	[2]	238,495	[2]	248,955	[2]
Pacific Rim
Revenue	39,289		37,327		77,911		74,577
Japan
Revenue	37,669		38,489		66,485		68,850
United States
Revenue	111,700		102,300		228,600		213,000
Germany
Revenue	$ 39,600		$ 41,200		$ 81,700		$ 97,400

[1] Includes revenue in the United States totaling $111.7 million and $102.3 million for the second quarters ended March 30, 2013 and March 31, 2012, respectively, and $228.6 million and $213.0 million for the six-month periods ended March 30, 2013 and March 31, 2012, respectively.

[2] Includes revenue in Germany totaling $39.6 million and $41.2 million for the second quarters ended March 30, 2013 and March 31, 2012, respectively, and $81.7 million and $97.4 million for the six-month periods ended March 30, 2013 and March 31, 2012, respectively.