Balance Sheet Classification of Contingent Consideration Liability (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2014	Dec. 31, 2013
Business Combination, Transactions [Line Items]
Contingent consideration liability	$ 1,435	$ 1,384
Other accrued liabilities
Business Combination, Transactions [Line Items]
Contingent consideration liability	164	164
Other long-term liabilities
Business Combination, Transactions [Line Items]
Contingent consideration liability	$ 1,271	$ 1,220