Derivative Instruments And Hedging Activities (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) country	Dec. 31, 2015 USD ($)	Dec. 31, 2014
Derivative [Line Items]
Minimum number of countries for which entity has operations | country	50
Percentage of sales outside of the Americas during the period	61.00%	59.00%	60.00%
Period of protection against the reduction in value caused by a fluctuation, minimum (in number of years)	1 year
Period of protection against the reduction in value caused by a fluctuation, maximum (in number of years)	3 years
Foreign currency forward contracts notional amount	$ 295,505	$ 144,961
Forward Contracts [Member]
Derivative [Line Items]
Estimated amount of reclassification of losses on derivative instruments from accumulated other comprehensive income to net sales	9,400
Estimated amount of reclassification of losses on derivative instruments from accumulated other comprehensive income to cost of sales	2,300
Estimated amount of reclassification of losses on derivative instruments from accumulated other comprehensive income to operating expenses	2,300
Other Derivatives [Member]
Derivative [Line Items]
Foreign currency forward contracts notional amount	$ 60,000	$ 97,000
Maximum [Member]
Derivative [Line Items]
Duration of derivative contracts entered into by the entity to hedge risk of loss	36 months
Maximum [Member] | Forward Contracts [Member]
Derivative [Line Items]
Percentage of derivative risk hedged	100.00%
Duration of derivative contracts entered into by the entity to hedge risk of loss	40 months
Maximum [Member] | Other Derivatives [Member]
Derivative [Line Items]
Percentage of derivative risk hedged	90.00%
Duration of derivative contracts entered into by the entity to hedge risk of loss	120 days