Income Taxes (Details 5)	12 Months Ended
	Dec. 31, 2011
Minimum | United States Federal
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2008
Minimum | State of California
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2007
Minimum | State of Massachusetts
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2008
Minimum | State of Oregon
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2008
Minimum | France
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2007
Minimum | Sweden
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2006
Minimum | United Kingdom
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2005
Minimum | Belgium
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2009
Maximum | United States Federal
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2010
Maximum | State of California
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2010
Maximum | State of Massachusetts
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2010
Maximum | State of Oregon
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2010
Maximum | France
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2010
Maximum | Sweden
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2010
Maximum | United Kingdom
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2010
Maximum | Belgium
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2010