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Intangible Assets from Acquisitions (Tables)
9 Months Ended
Sep. 30, 2012
Intangible Assets from Acquisitions [Abstract]  
Intangible Assets from Acquisitions
                         
    As of December 31, 2011  
    Gross Carrying Amount     Accumulated Amortization(1)     Net  

Advertiser relationship

  $ 3,070     $ (897   $ 2,173  

Patents

    318       (232     86  

Distribution partner relationship

    4,830       (1,177     3,653  

Non-compete agreements

    58       (43     15  

Trademarks/domains

    40,539       (40,130     409  

Acquired technology

    2,760       (1,008     1,752  
   

 

 

   

 

 

   

 

 

 
    $ 51,575     $ (43,487   $ 8,088  
   

 

 

   

 

 

   

 

 

 
   
    As of September 30, 2012  
    Gross Carrying Amount     Accumulated Amortization(1)     Net  

Advertiser relationship

  $ 3,070     $ (1,818   $ 1,252  

Distribution partner relationship

    4,830       (2,384     2,446  

Acquired technology

    2,760       (2,044     716  
   

 

 

   

 

 

   

 

 

 
    $ 10,660     $ (6,246   $ 4,414