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Acquisitions and divestitures (Tables)
6 Months Ended
Jun. 30, 2021
Business Combinations [Abstract]  
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
The following table summarizes the assets acquired and liabilities assumed in these transactions and recognized at their acquisition dates at estimated fair values, as well as the estimated fair value of the noncontrolling interests assumed in these transactions:
Current assets$3,832 
Property and equipment1,853 
Other long-term assets2,259 
Indefinite-lived licenses1,593 
Goodwill28,323 
Liabilities assumed(6,726)
Noncontrolling interests(1,249)
$29,885 
Schedule of Business Acquisitions by Acquisition, Contingent Consideration
The following is a reconciliation of changes in contingent earn-out obligations for the three and six months ended June 30, 2021:
Three months ended
June 30, 2021
Six months ended
June 30, 2021
Beginning balance $28,225 $30,248 
Acquisitions2,156 2,694 
Foreign currency translation3,055 975 
Fair value remeasurements60 (154)
Payments(5,154)(5,421)
Ending balance$28,342 $28,342