Balance Sheet Classification of Contingent Consideration Liability (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2013	Dec. 31, 2012
Business Combination, Transactions [Line Items]
Contingent consideration liability	$ 5,087	$ 5,151
Other accrued liabilities
Business Combination, Transactions [Line Items]
Contingent consideration liability	42	265
Other long-term liabilities
Business Combination, Transactions [Line Items]
Contingent consideration liability	$ 5,045	$ 4,886

The amount, measured at acquisition-date fair value, of all liabilities assumed that arise from contingencies and were recognized by the entity.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(1)

-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472

Name:	us-gaap_BusinessCombinationLiabilitiesArisingFromContingenciesAmountRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant