Business Segment Information (Details) Geographic Information (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Oct. 01, 2011	Oct. 02, 2010	Oct. 03, 2009
Geographic information [Abstract]
Revenue	$ 467,368	$ 374,053	$ 408,881
Property and equipment, net	56,252	56,444	56,118
Minimum disclosure threshold percentage of revenues by country (in hundredths)	10.00%
Minimum disclosure threshold percentage of revenues by customer (in hundredths)	10.00%
United States [Member]
Geographic information [Abstract]
Revenue	109,133	109,638	123,336
Property and equipment, net	35,972	36,216	34,613
Europe, excluding Germany [Member]
Geographic information [Abstract]
Revenue	107,111	71,155	95,368
Property and equipment, net	777	537	576
China [Member]
Geographic information [Abstract]
Revenue	104,461	77,600	61,209
Property and equipment, net	6,944	6,915	7,043
Japan [Member]
Geographic information [Abstract]
Revenue	37,394	27,540	47,500
Germany [Member]
Geographic information [Abstract]
Revenue	43,021	41,710	33,341
Property and equipment, net	10,585	10,748	12,092
Asia, excluding Japan and China [Member]
Geographic information [Abstract]
Revenue	38,768	33,673	29,439
Other geographical area [Member]
Geographic information [Abstract]
Revenue	27,480	12,737	18,688
Asia, excluding China [Member]
Geographic information [Abstract]
Property and equipment, net	$ 1,974	$ 2,028	$ 1,794