Derivative Financial Instruments, Notional Amounts and Fair Values of Foreign Currency Forward Contracts Designated as Cash Flow Hedging Instruments (Details) - Cash Flow Hedging [Member] - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Apr. 01, 2018	Dec. 31, 2017	Apr. 02, 2017
Foreign Exchange Forward [Member]
Derivative [Line Items]
Notional amount of derivative	$ 1,273,262	$ 1,376,877	$ 1,722,071
Fair value of hedged item	(35,732)	(7,934)	35,449
Inventory Purchases [Member]
Derivative [Line Items]
Notional amount of derivative	718,925	756,673	974,235
Fair value of hedged item	(31,453)	(13,695)	35,711
Sales [Member]
Derivative [Line Items]
Notional amount of derivative	375,441	423,315	423,828
Fair value of hedged item	7,323	16,144	1,083
Royalties and Other [Member]
Derivative [Line Items]
Notional amount of derivative	178,896	196,889	324,008
Fair value of hedged item	$ (11,602)	$ (10,383)	$ (1,345)