Derivatives (Schedule Of Realized And Unrealized Gains Or Losses On Derivative Instruments) (Details) (Gain (Loss) On Currency Exchange [Member], Foreign Exchange Contracts [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Gain (Loss) On Currency Exchange [Member] | Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized and unrealized gains or losses on derivative instruments	$ (23)	$ 13	$ (90)	$ (14)