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Income Taxes (Details 6)
 12 Months Ended
Dec. 31, 2012
United States - Federal [Member]
  
Summary of tax years that remain subject to examination by major jurisdiction  
Income tax examinations not yet initiated 2009 – 2012
United States - State [Member]
  
Summary of tax years that remain subject to examination by major jurisdiction  
Income tax examinations not yet initiated 2008 – 2012
Income tax examination in progress 2004, 2006, 2008, 2009
Canada [Member]
  
Summary of tax years that remain subject to examination by major jurisdiction  
Income tax examinations not yet initiated 2010 – 2012
Income tax examination in progress 2007 – 2011
Germany [Member]
  
Summary of tax years that remain subject to examination by major jurisdiction  
Income tax examinations not yet initiated 2007, 2010 – 2012
Income tax examination in progress 2008 – 2010
France [Member]
  
Summary of tax years that remain subject to examination by major jurisdiction  
Income tax examinations not yet initiated 2010 – 2012
United Kingdom [Member]
  
Summary of tax years that remain subject to examination by major jurisdiction  
Income tax examinations not yet initiated 2009 – 2012
Philippines [Member]
  
Summary of tax years that remain subject to examination by major jurisdiction  
Income tax examinations not yet initiated 2011 – 2012
Income tax examination in progress 2010