Fair Value Measurement (Details 3) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jul. 01, 2012	Jul. 03, 2011
Table reconciles long-lived assets
Beginning balance	$ 84,860
Capital expenditures	6,877	6,526
Capital expenditures to replace property, plant and equipment damaged in Thailand flood	2,859
Ending balance	91,171
Estimated Fair Values [Member]
Table reconciles long-lived assets
Beginning balance	84,860
Capital expenditures	6,877
Capital expenditures to replace property, plant and equipment damaged in Thailand flood	2,859
Fixed assets acquired in Valpey-Fisher acquisition-Note C	6,231
Depreciation expense	(8,101)
Transfer to asset held for sale	(350)
Impairment Charge	(1,239)
Foreign exchange impact and other	34
Ending balance	$ 91,171