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		6 Months Ended
	Jun. 29, 2013 USD ($)	Jun. 30, 2012 USD ($)	Jun. 29, 2013 USD ($)	Jun. 30, 2012 USD ($)	Dec. 31, 2012	Jun. 29, 2013 Foreign Exchange Forward [Member] EUR (€)	Dec. 31, 2012 Foreign Exchange Forward [Member] EUR (€)
Derivative [Line Items]
Notional balance of outstanding contracts versus the dollar						€ 87,660	€ 88,680
Hedge effectiveness	100.00%		100.00%		100.00%
Net gains (losses) included in net sales	$ (900)	$ 1,492	$ (1,947)	$ 2,649