Derivative Instruments - Financial Information Related to Cash Flow Hedges of Future Revenues (Detail) (Cash Flow Hedging [Member]) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014 USD ($)	Sep. 28, 2013 USD ($)	Sep. 27, 2014 USD ($)	Sep. 28, 2013 USD ($)	Dec. 31, 2013	Sep. 27, 2014 Foreign Exchange Forward [Member] EUR (€)	Dec. 31, 2013 Foreign Exchange Forward [Member] EUR (€)
Derivative [Line Items]
Notional balance of outstanding contracts versus the dollar						€ 91,860	€ 85,627
Hedge effectiveness	100.00%		100.00%		100.00%
Net gains (losses) included in net sales	$ 421	$ (1,135)	$ (1,507)	$ (3,082)