Business Segment Information (Geographical Information) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Oct. 02, 2010
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 542,256	$ 467,368	$ 374,053
Property and Equipment, Net	61,653	56,252	56,444
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	140,305	109,133	109,638
Property and Equipment, Net	40,522	35,972	36,216
Europe, Excluding Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	114,521	107,111	71,155
Property and Equipment, Net	804	777	537
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	103,977	104,461	77,600
Property and Equipment, Net	7,377	6,944	6,915
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	53,307	43,021	41,710
Property and Equipment, Net	11,255	10,585	10,748
Asia, Excluding China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	100,166	76,162	61,213
Property and Equipment, Net	1,695	1,974	2,028
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 29,980	$ 27,480	$ 12,737