Derivative Instruments (Effect Of Derivative Instruments Not Designated As Hedges On Results Of Operations) (Details) (Other (Expense) Income, Net [Member], Foreign Currency Contracts [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Other (Expense) Income, Net [Member] | Foreign Currency Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized on derivative instruments	$ (1,743)	$ (1,613)