Income Taxes (Details 5)	12 Months Ended
	Dec. 31, 2012
Belgium
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2011
Minimum | United States Federal
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2009
Minimum | State of California
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2008
Minimum | State of Massachusetts
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2009
Minimum | State of Oregon
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2009
Minimum | Sweden
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2007
Minimum | United Kingdom
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2006
Maximum | United States Federal
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2011
Maximum | State of California
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2011
Maximum | State of Massachusetts
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2011
Maximum | State of Oregon
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2011
Maximum | Sweden
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2011
Maximum | United Kingdom
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2011