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Goodwill and Other Intangible Assets - Carrying Amount of Goodwill (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2021
USD ($)
Goodwill [Roll Forward]  
Goodwill beginning balance $ 581,174
Acquisitions 1,061,849
Foreign currency translation adjustments (50,234)
Other adjustments (390)
Goodwill ending balance $ 1,592,399