Derivative Instruments And Hedging Activities (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Derivative Instruments And Hedging Activities [Line Items]
Minimum number of countries for which entity has operations	40
Percentage of sales outside of the Americas during the period	60.00%	59.00%
Forward Contracts [Member]
Derivative Instruments And Hedging Activities [Line Items]
Period of protection against the reduction in value caused by a fluctuation, minimum (in number of years)	1
Period of protection against the reduction in value caused by a fluctuation, maximum (in number of years)	2
Percentage of derivative risk hedged	100.00%
Duration of derivative contracts entered into by the entity to hedge risk of loss	40 months or less
Duration of foreign currency forward contracts entered into by the entity to hedge risk of loss	up to 24 months
Estimated amount of reclassification of losses on derivative instruments from accumulated other comprehensive income to net sales	1,800,000
Estimated amount of reclassification of losses on derivative instruments from accumulated other comprehensive income to cost of sales	856,000
Estimated amount of reclassification of losses on derivative instruments from accumulated other comprehensive income to operating expenses	486,000
Options Held [Member]
Derivative Instruments And Hedging Activities [Line Items]
Notional amount	0	0
Other Derivatives [Member]
Derivative Instruments And Hedging Activities [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
Foreign currency forward contracts notional amount	53,800,000	41,300,000
EURO Currency [Member] | Forward Contracts [Member]
Derivative Instruments And Hedging Activities [Line Items]
Notional amount	61,000,000	28,300,000
British Pound Sterling [Member] | Forward Contracts [Member]
Derivative Instruments And Hedging Activities [Line Items]
Notional amount		6,000,000
Japanese Yen [Member] | Forward Contracts [Member]
Derivative Instruments And Hedging Activities [Line Items]
Notional amount	43,600,000	18,400,000
Korean Won [Member] | Forward Contracts [Member]
Derivative Instruments And Hedging Activities [Line Items]
Notional amount	3,300,000
Hungarian Forint [Member] | Forward Contracts [Member]
Derivative Instruments And Hedging Activities [Line Items]
Notional amount	28,200,000	33,400,000