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Intangibles and Other Assets
 6 Months Ended
Jun. 30, 2011
Intangibles and Other Assets [Abstract]  
Intangibles and Other Assets
6.
INTANGIBLES AND OTHER ASSETS

Intangibles and other assets consist of the following (in thousands, except amortization period data):

   
 
June 30,
2011
  
 
December 31,
2010
  
Weighted- Average Amortization Period (in years)
 
Capitalized product development cost
 $2,368  $1,795   5 
Accumulated amortization
  (1,795)  (1,795)    
Capitalized product development cost, net
  573   ¾     
              
Building photography
  11,959   11,771   5 
Accumulated amortization
  (10,850)  (10,311)    
Building photography, net
  1,109   1,460     
              
Acquired database technology
  26,101   26,034   4 
Accumulated amortization
  (22,718)  (22,150)    
Acquired database technology, net
  3,383   3,884     
              
Acquired customer base
  55,849   55,380   10 
Accumulated amortization
  (44,768)  (43,349)    
Acquired customer base, net
  11,081   12,031     
              
Acquired trade names and other
  9,778   9,640   7 
Accumulated amortization
  (8,467)  (8,241)    
Acquired trade names and other, net
  1,311   1,399     
              
Intangibles and other assets, net
 $17,457  $18,774