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Goodwill (Tables)
12 Months Ended
Dec. 31, 2020
Goodwill (Tables) [Line Items]  
Summary of changes in the carrying amount of goodwill
   IT
professional
services
   Software
services
   Total 
             
As of January 1, 2019  $46,691   $48,315   $95,006 
                
Business combination   12,691    3,382    16,073 
Measurement period adjustments   (785)   3,762    2,977 
Foreign currency translation adjustments   1,749    1,938    3,687 
                
As of December 31, 2019  $60,346   $57,397   $117,743 
                
Business combination   5,832    5,718    11,550 
Measurement period adjustments   1,443    618    2,061 
Foreign currency translation adjustments   1,725    2,603    4,328 
                
As of December 31, 2020  $69,346   $66,336   $135,682