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Income Taxes (Tables)
6 Months Ended
Jun. 30, 2014
Income Tax Disclosure [Abstract]  
Open Tax Years for Each Major Jurisdiction

The following table summarizes the open tax years for each major jurisdiction:

 

Jurisdiction

   Open Tax Years  

United States Federal

     2002—2013   

United Kingdom

     2005—2013   

Netherlands

     2008—2013