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Commitments and Contingencies (Tables)
6 Months Ended
Jun. 30, 2012
Commitments and Contingencies [Abstract]  
Annual future minimum payments under operating leases

Revenues by geographic area, based on the billing location of the customer, were as follows for the periods presented (in thousands):

 

                                 
    Three Months Ended June 30,     Six Months Ended June 30,  
    2012     2011     2012     2011  

North America

  $ 40,685     $ 22,977     $ 74,616     $ 41,414  

Europe

    14,016       5,492       25,893       11,400  

Asia Pacific and other

    2,073       1,016       3,696       1,883  
   

 

 

   

 

 

   

 

 

   

 

 

 

Total revenues

  $ 56,774     $ 29,485     $ 104,205     $ 54,697