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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Income Taxes [Line Items]  
Unrecognized tax benefits, Balance at beginning of year $ 2,533
Unrecognized tax benefits, Decrease for tax position in prior years (722)
Unrecognized tax benefits, Increases for tax position in prior years 306
Unrecognized tax benefits, Foreign currency revaluation 64
Unrecognized tax benefits, Balance at end of year $ 2,181