Derivatives (Gains and Losses for Derivatives that were Not Designated as Hedging Instruments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Derivative [Line Items]
Gain and losses for derivatives not designated as hedging instruments	$ 132	$ 128	$ (30)	$ (326)
Other (Expense) Income [Member] | Currency contracts [Member]
Derivative [Line Items]
Gain and losses for derivatives not designated as hedging instruments	$ 132	$ 128	$ (30)	$ (326)