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Income Taxes (Details 4)
 12 Months Ended
Dec. 31, 2012
Australia [Member] | VDS Pty. Ltd.[Member]
  
Summary of Income Tax Examinations  
Earliest year for which tax returns are subject to being audited 2005
Austria [Member] | VDS Austria [Member]
  
Summary of Income Tax Examinations  
Earliest year for which tax returns are subject to being audited 2004
Belgium [Member] | VDS NV [Member]
  
Summary of Income Tax Examinations  
Earliest year for which tax returns are subject to being audited 2008
Belgium [Member] | VDS Europe NV [Member]
  
Summary of Income Tax Examinations  
Earliest year for which tax returns are subject to being audited 2008
Belgium [Member] | Lintel [Member]
  
Summary of Income Tax Examinations  
Earliest year for which tax returns are subject to being audited 2008
Belgium [Member] | Able NV [Member]
  
Summary of Income Tax Examinations  
Earliest year for which tax returns are subject to being audited 2006
Netherlands [Member] | VDS BV [Member]
  
Summary of Income Tax Examinations  
Earliest year for which tax returns are subject to being audited 2007
Singapore [Member] | VDS Asia Pacific [Member]
  
Summary of Income Tax Examinations  
Earliest year for which tax returns are subject to being audited 2007
Switzerland [Member] | VDS International GmbH [Member]
  
Summary of Income Tax Examinations  
Earliest year for which tax returns are subject to being audited 2006
United States [Member] | VDS International, Inc.[Member]
  
Summary of Income Tax Examinations  
Earliest year for which tax returns are subject to being audited 2005