Derivative Instruments And Hedging Activities (Summary Of Notional Amounts Of Derivative Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Total forward contracts notional amount	$ 136,889	$ 199,113
Euro [Member]
Derivative [Line Items]
Total forward contracts notional amount	54,053	97,198
Japanese Yen [Member]
Derivative [Line Items]
Total forward contracts notional amount	3,451	7,798
Hungarian Forint [Member]
Derivative [Line Items]
Total forward contracts notional amount	52,086	61,067
British Pound [Member]
Derivative [Line Items]
Total forward contracts notional amount	11,227	22,809
Malaysian Ringgit [Member]
Derivative [Line Items]
Total forward contracts notional amount	$ 16,072	$ 10,241