Acquisition (Details 2) (CTS [Member], Valpey-Fisher [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011
CTS [Member] \| Valpey-Fisher [Member]
Summary of pro-forma net sales and earnings before income taxes
Net Sales	$ 154,294	$ 150,804	$ 302,379	$ 305,841
Earnings before income taxes	$ 4,528	$ 5,136	$ 6,812	$ 11,617

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=7659399&loc=d3e1392-128463

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration