Derivative Instruments And Hedging Activities (Summary Of Notional Amounts Of Derivative Instruments) (Details) (Imported) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]
Total forward contracts notional amount	$ 162,984	$ 136,059
EURO Currency [Member]
Derivative [Line Items]
Total forward contracts notional amount	84,770	60,992
Japanese Yen [Member]
Derivative [Line Items]
Total forward contracts notional amount	42,209	43,569
Korean Won [Member]
Derivative [Line Items]
Total forward contracts notional amount		3,309
Hungarian Forint [Member]
Derivative [Line Items]
Total forward contracts notional amount	$ 36,005	$ 28,189