Income Taxes (Details)	9 Months Ended
	Sep. 30, 2012
United States - Federal [Member]
Tax years that remain subject to examination by major jurisdiction
Income tax examinations not yet initiated	2009-2011
United States - State [Member]
Tax years that remain subject to examination by major jurisdiction
Income tax examinations not yet initiated	2005-2011
Income tax examination in progress	2004, 2006, 2008, 2009
Canada [Member]
Tax years that remain subject to examination by major jurisdiction
Income tax examinations not yet initiated	2007-2011
Income tax examination in progress	2007-2010
Germany [Member]
Tax years that remain subject to examination by major jurisdiction
Income tax examinations not yet initiated	2007-2011
Income tax examination in progress	2008-2010
France [Member]
Tax years that remain subject to examination by major jurisdiction
Income tax examinations not yet initiated	2009-2011
United Kingdom [Member]
Tax years that remain subject to examination by major jurisdiction
Income tax examinations not yet initiated	2008-2011
Philippines [Member]
Tax years that remain subject to examination by major jurisdiction
Income tax examinations not yet initiated	2010-2011
Income tax examination in progress	2009-2010