Derivative Instruments - Outstanding Forward Contracts Table (Detail) - Not Designated as Hedging Instrument ₩ in Thousands, ¥ in Thousands, £ in Thousands, SFr in Thousands, Ft in Thousands, $ in Thousands, $ in Thousands	Apr. 01, 2018 HUF (Ft)	Apr. 01, 2018 GBP (£)	Apr. 01, 2018 CHF (SFr)	Apr. 01, 2018 JPY (¥)	Apr. 01, 2018 KRW (₩)	Apr. 01, 2018 TWD ($)	Apr. 01, 2018 USD ($)	Dec. 31, 2017 HUF (Ft)	Dec. 31, 2017 GBP (£)	Dec. 31, 2017 CHF (SFr)	Dec. 31, 2017 JPY (¥)	Dec. 31, 2017 KRW (₩)	Dec. 31, 2017 TWD ($)	Dec. 31, 2017 USD ($)
Japanese Yen
Derivative [Line Items]
Outstanding forward contracts				¥ 565,000			$ 5,299				¥ 455,000			$ 4,049
Swiss Franc
Derivative [Line Items]
Outstanding forward contracts			SFr 1,600				2,072			SFr 1,365				1,401
British Pound
Derivative [Line Items]
Outstanding forward contracts		£ 1,300					1,824		£ 1,650					2,232
Hungarian Forint
Derivative [Line Items]
Outstanding forward contracts	Ft 400,000						1,576	Ft 545,000						2,110
Taiwanese Dollar
Derivative [Line Items]
Outstanding forward contracts						$ 43,000	1,480						$ 37,725	1,278
Korean Won
Derivative [Line Items]
Outstanding forward contracts					₩ 655,000		$ 616					₩ 1,825,000		$ 1,708