Derivative Instruments - Financial Information Related to Cash Flow Hedges of Future Revenues (Detail) - Cash Flow Hedging [Member] € in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2015 USD ($)	Jun. 28, 2014 USD ($)	Jul. 04, 2015 USD ($)	Jun. 28, 2014 USD ($)	Jul. 04, 2015 EUR (€)	Dec. 31, 2014 EUR (€)
Derivative [Line Items]
Hedge effectiveness					100.00%	100.00%
Net gains (losses) included in revenue	$ 4,833	$ (957)	$ 11,268	$ (1,928)
Foreign Exchange Forward [Member]
Derivative [Line Items]
Notional balance of outstanding contracts versus the dollar | €					€ 98,120	€ 88,969