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Goodwill and Intangible Assets (Tables)
 3 Months Ended
Mar. 31, 2012
Goodwill and Intangible Assets [Abstract]  
Changes in the carrying amount of goodwill
The changes in the carrying value of Goodwill for the three months ended March 31, 2012 were as follows:
 
      
Accumulated
    
      
Impairment
    
   
Goodwill
  
Losses
  
Total
 
Balance as of December 31, 2011
 $66,523  $(46,220) $20,303 
Foreign currency fluctuations
  1,537   (1,398)  139 
Balance as of March 31, 2012
 $68,060  $(47,618) $20,442 
Acquired intangible assets excluding Goodwill
The balances of acquired Intangible Assets, excluding Goodwill, as of March 31, 2012 and December 31, 2011 were as follows:

   
Customer Lists
and
Service Contracts
  
Trade
Name
  
Technology
  
Total
 
Balance as of March 31, 2012:
            
Original cost
 $24,465  $4,701  $7,234  $36,400 
Accumulated amortization
  (9,022)  (1,325)  (2,521)  (12,868)
Carrying value
 $15,443  $3,376  $4,713  $23,532 
Weighted-average original life (in years)
  15   14   13     
                  
Balance as of December 31, 2011:
                
Original cost
 $25,987  $4,583  $7,136  $37,706 
Accumulated amortization
  (10,387)  (1,209)  (2,352)  (13,948)
Carrying value
 $15,600  $3,374  $4,784  $23,758 
Weighted-average original life (in years)
  14   14   13     
 
Estimated aggregate amortization expense of Intangible Assets
Estimated aggregate amortization expense based on the current carrying value of amortizable Intangible Assets for each of the five succeeding years and thereafter is as follows:

Remaining 2012
 $1,792 
2013
  2,385 
2014
  2,322 
2015
  2,309 
2016
  2,269 
Thereafter
  12,455 
Total
 $23,532