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Goodwill and Intangible Assets
3 Months Ended
Mar. 31, 2012
Goodwill and Intangible Assets [Abstract]  
Goodwill and Intangible Assets
(4)       Goodwill and Intangible Assets

The change in the carrying amount of goodwill for the three months ended March 31, 2012, is as follows:

Balance as of December 31, 2011
 $36,731 
Translation effect
  949 
Balance as of March 31, 2012
 $37,680 

Acquired intangible assets, which are amortized, consist of the following:

     
As of March 31, 2012
 
 
Amortization
Period
 
Gross
Carrying
Amount
  
Accumulated
Amortization
  
Net Carrying
Amount
 
             
Technology-based intangibles
20 years
 $4,060  $(406) $3,654 
Customer-related intangibles
10 - 15 years
  788   (108)  680 
     $4,848  $(514) $4,334 
 
     
As of December 31, 2011
 
 
Amortization
Period
 
Gross
Carrying
Amount
  
Accumulated
Amortization
  
Net Carrying
Amount
 
             
Technology-based intangibles
20 years
 $3,933  $(344) $3,589 
Customer-related intangibles
10 - 15 years
  763   (91)  672 
     $4,696  $(435) $4,261 

The change in the gross carrying amount is primarily due to the impact of foreign currency translation.

Amortization expense was $63 and $96 for the three months ended March 31, 2012 and 2011, respectively.

Amortization expense related to current intangible assets is expected to be approximately $253 for 2012 and for each of the next four years.