Derivative Instruments - Outstanding Forward Contracts Table (Detail) - Not Designated as Hedging Instrument € in Thousands, ₩ in Thousands, ¥ in Thousands, £ in Thousands, SFr in Thousands, Ft in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands	Jul. 01, 2018 HUF (Ft)	Jul. 01, 2018 GBP (£)	Jul. 01, 2018 CHF (SFr)	Jul. 01, 2018 CAD ($)	Jul. 01, 2018 SGD ($)	Jul. 01, 2018 JPY (¥)	Jul. 01, 2018 KRW (₩)	Jul. 01, 2018 TWD ($)	Jul. 01, 2018 EUR (€)	Jul. 01, 2018 USD ($)	Dec. 31, 2017 HUF (Ft)	Dec. 31, 2017 GBP (£)	Dec. 31, 2017 CHF (SFr)	Dec. 31, 2017 CAD ($)	Dec. 31, 2017 SGD ($)	Dec. 31, 2017 JPY (¥)	Dec. 31, 2017 KRW (₩)	Dec. 31, 2017 TWD ($)	Dec. 31, 2017 EUR (€)	Dec. 31, 2017 USD ($)
Euro Member Countries, Euro
Derivative [Line Items]
Outstanding forward contracts									€ 17,000	$ 19,897									€ 0	$ 0
Japanese Yen
Derivative [Line Items]
Outstanding forward contracts						¥ 790,000				8,423						¥ 455,000				4,049
Switzerland, Francs
Derivative [Line Items]
Outstanding forward contracts			SFr 2,425							2,879			SFr 1,365							1,401
Hungarian Forint
Derivative [Line Items]
Outstanding forward contracts	Ft 655,000									2,756	Ft 545,000									2,110
British Pound
Derivative [Line Items]
Outstanding forward contracts		£ 2,430								2,142		£ 1,650								2,232
Korean Won
Derivative [Line Items]
Outstanding forward contracts							₩ 1,875,000			1,968							₩ 1,825,000			1,708
Taiwanese Dollar
Derivative [Line Items]
Outstanding forward contracts								$ 47,600		1,837								$ 37,725		1,278
Canada, Dollars
Derivative [Line Items]
Outstanding forward contracts				$ 855						753				$ 0						0
Singapore Dollar
Derivative [Line Items]
Outstanding forward contracts					$ 700					$ 602					$ 0					$ 0