Derivative Instruments And Hedging Activities (Summary Of Notional Amounts Of Derivative Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Total forward contracts notional amount	$ 161,268	$ 199,113
Euro [Member]
Derivative [Line Items]
Total forward contracts notional amount	40,929	97,198
Japanese Yen [Member]
Derivative [Line Items]
Total forward contracts notional amount	1,799	7,798
Hungarian Forint [Member]
Derivative [Line Items]
Total forward contracts notional amount	45,516	61,067
British Pound [Member]
Derivative [Line Items]
Total forward contracts notional amount	5,770	22,809
Malaysian Ringgit [Member]
Derivative [Line Items]
Total forward contracts notional amount	44,467	$ 10,241
Chinese Yuan [Member]
Derivative [Line Items]
Total forward contracts notional amount	$ 22,787