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Income Taxes Income taxes (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Income Tax Holiday [Line Items]    
Deferred Tax Liabilities, Undistributed Foreign Earnings $ (20,748) $ (10,224)
Undistributed Earnings of Foreign Subsidiaries $ 43 $ 27,100