Tax Years Open to Examination by Major Taxing Jurisdictions (Detail)	9 Months Ended
	Sep. 30, 2011
Minimum | State of Oregon
Income Tax Examination [Line Items]
Tax year open to examination	2008
Minimum | State of Massachusetts
Income Tax Examination [Line Items]
Tax year open to examination	2008
Minimum | State of California
Income Tax Examination [Line Items]
Tax year open to examination	2006
Minimum | Sweden
Income Tax Examination [Line Items]
Tax year open to examination	2003
Minimum | United Kingdom
Income Tax Examination [Line Items]
Tax year open to examination	2007
Minimum | Germany
Income Tax Examination [Line Items]
Tax year open to examination	2004
Minimum | France
Income Tax Examination [Line Items]
Tax year open to examination	2006
Maximum | US Federal
Income Tax Examination [Line Items]
Tax year open to examination	2010
Maximum | State of Oregon
Income Tax Examination [Line Items]
Tax year open to examination	2010
Maximum | State of Massachusetts
Income Tax Examination [Line Items]
Tax year open to examination	2010
Maximum | State of California
Income Tax Examination [Line Items]
Tax year open to examination	2010
Maximum | Sweden
Income Tax Examination [Line Items]
Tax year open to examination	2010
Maximum | United Kingdom
Income Tax Examination [Line Items]
Tax year open to examination	2010
Maximum | Germany
Income Tax Examination [Line Items]
Tax year open to examination	2010
Maximum | France
Income Tax Examination [Line Items]
Tax year open to examination	2010
US Federal
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2010
State of Oregon
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2008-2010
State of Massachusetts
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2008-2010
State of California
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2006-2010
Sweden
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2003-2010
United Kingdom
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2007-2010
Germany
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2004-2010
France
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2006-2010