Gain (Loss) On Derivative Instruments (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 29, 2017	Sep. 30, 2016	Sep. 29, 2017	Sep. 30, 2016
Unrealized (loss) gain on net investment hedges				$ (27,737)	$ 3,482
Designated As Hedging Instrument [Member]
Unrealized (loss) gain on net investment hedges	[1]	$ (8,308)	$ 9,187	(27,737)	3,482
Designated As Hedging Instrument [Member] | Foreign currency contracts related to customer sales contracts
Unrealized gain (loss) on Foreign Currency Contracts		798	(362)	3,515	496
Realized gain (loss) on Foreign Currency Contracts		323	297	1,950	(2,075)
Designated As Hedging Instrument [Member] | Foreign currency contracts related to supplier purchase contracts
Unrealized gain (loss) on Foreign Currency Contracts		306	403	945	(838)
Realized gain (loss) on Foreign Currency Contracts		(1,022)	(207)	(2,036)	2,504
Not Designated As Hedging Instrument [Member] | Foreign currency contracts related to customer sales contracts
Unrealized gain (loss) on Foreign Currency Contracts		(289)	157	(29)	777
Realized gain (loss) on Foreign Currency Contracts		(737)	(521)	853	(684)
Not Designated As Hedging Instrument [Member] | Foreign currency contracts related to supplier purchase contracts
Unrealized gain (loss) on Foreign Currency Contracts		(104)	(42)	500	(558)
Realized gain (loss) on Foreign Currency Contracts		$ 498	$ (360)	$ 243	$ (621)

[1] The unrealized (loss) gain on net investment hedges is attributable to the change in valuation of Euro denominated debt.