Hedging Activities and Fair Value Measurements (Schedule of Gains and (Losses) on Forward Currency Contracts Outstanding and Total Net Foreign Currency Gains and (Losses)) (Details) (USD $) In Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Hedging Activities and Fair Value Measurements
Foreign currency forward contracts	$ (1,586)		$ 2,188		$ (2,005)		$ 5,360
Total net foreign currency gains and (losses)	$ (1,344)	[1]	$ (373)	[1]	$ (2,589)	[1]	$ 628	[1]

[1] See Note 13 "Supplemental Information"