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Goodwill and Acquired Intangible Assets, Net (Tables) | 9 Months Ended
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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 |

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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
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