Business Segment Information (Geographical Information) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 29, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 564,328	$ 569,439	$ 542,256
Property and Equipment, Net	81,575	78,399	61,653
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	144,239	137,750	140,305
Property and Equipment, Net	58,911	55,509	40,522
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	179,043	178,610	167,828
Property and Equipment, Net	13,573	13,838	12,059
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	117,952	127,368	103,977
Property and Equipment, Net	7,034	7,661	7,377
Asia, Excluding China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	90,242	96,653	100,166
Property and Equipment, Net	2,057	1,391	1,695
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 32,852	$ 29,058	$ 29,980