Derivative Instruments (Derivative instruments in the condensed consolidated balance sheet) (Details) (Foreign Exchange Contract [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Designated As Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	$ 2
Designated As Hedging Instrument [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	(516)
Derivatives Not Designated As Hedging Instruments [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	9
Derivatives Not Designated As Hedging Instruments [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	$ (237)