Fair Value Measurement (Details 1) (USD $) In Thousands, unless otherwise specified	Jul. 01, 2012	Dec. 31, 2011
Table reconciles goodwill, intangible assets
Beginning balance	$ 5,855	$ 500
Ending balance	5,855	500
Estimated Fair Values [Member]
Table reconciles goodwill, intangible assets
Beginning balance	5,855	500
2012 first half activity, Note C, - Acquisitions	5,355
Ending balance	5,855	500
Estimated Fair Values [Member] | Components and Sensors [Member]
Table reconciles goodwill, intangible assets
Beginning balance	5,355
2012 first half activity, Note C, - Acquisitions	5,355
Ending balance	5,355
Estimated Fair Values [Member] | EMS [Member]
Table reconciles goodwill, intangible assets
Beginning balance	500	500
Ending balance	$ 500	$ 500