Derivatives And Other Financial Instruments (Liability Derivatives) (Details) (Accounts Payable, Accrued Expenses And Others [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
SWAP Contracts [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 2,273	$ 1,668	$ 1,930
Foreign Currency Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 48	$ 79	$ 83