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Goodwill (Tables)
6 Months Ended
Jun. 30, 2011
Goodwill  
Changes in Carrying Amount of Goodwill
Goodwill, gross, as of January 1, 2011
 
$
136,408
 
Accumulated impairment losses as of January 1, 2011
   
 
Goodwill, net, as of January 1, 2011
 
$
136,408
 
         
Acquisition of DealerTrack Processing Solutions
   
74,217
 
Acquisition of Automotive Information Center
   
490
 
Impact of change in Canadian dollar exchange rate
   
822
 
Goodwill, gross, as of June 30, 2011
 
$
211,937
 
         
Accumulated impairment losses as of June 30, 2011
   
 
Goodwill, net, as of June 30, 2011
 
$
211,937