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Market Concentrations and Risks (Tables)
12 Months Ended
Dec. 31, 2011
Market Concentrations and Risks [Abstract]  
Summary of carrying amounts of net assets belonging to international operations

The carrying amounts of net assets belonging to our international operations were as follows:

 

                 
    December 31,  
    2011     2010  
    (In thousands)  

Canada and Latin America

  $ 47,274     $ 6,735  

Europe, Africa and Middle East

    69,302       23,530  

Asia Pacific

    221,040       228,018