Income Taxes Income Taxes (Details Parentheticals)	3 Months Ended
	Mar. 31, 2014
US Federal | Minimum
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2012
US Federal | Maximum
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2013
State of Massachusetts | Minimum
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2011
State of Massachusetts | Maximum
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2013
State of California | Minimum
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2008
State of California | Maximum
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2013
State of Oregon | Minimum
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2012
State of Oregon | Maximum
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2013
Sweden | Minimum
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2008
Sweden | Maximum
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2013
United Kingdom | Minimum
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2007
United Kingdom | Maximum
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2013
Belgium | Minimum
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2011
Belgium | Maximum
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2013