Acquisition - Summary of Pro-forma Net Sales and Earnings Before Income Taxes (Detail) (D&R acquisition [Member], Valpey-Fisher acquisition [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
D&R acquisition [Member] \| Valpey-Fisher acquisition [Member]
Business Acquisition [Line Items]
Net Sales	$ 355,463	$ 343,365
Earnings before income taxes	$ 17,669	$ 11,776

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=25497992&loc=d3e1392-128463

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