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Goodwill and Acquired Intangible Assets, Net (Tables)
9 Months Ended
Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of acquired intangible assets and goodwill activity
A summary of acquired intangible assets and goodwill activity for the nine months ended September 30, 2021 is presented below:
(in thousands)


 Acquired
Intangible
Assets



Goodwill

 
Total
Intangible
Assets

Balance as of December 31, 2020
 
$
121,883

 
$
665,821

 
$
787,704

Decreases:
 
 
 
 
 
 
Acquisition
 

 
 

Amortization
 
(17,388
)
 

 
(17,388
)
Foreign currency exchange rate changes
 
(2,257
)
 
(19,643
)
 
(21,900
)
Balance as of September 30, 2021
 
$
102,238

 
$
646,178

 
$
748,416