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Goodwill and Other Intangible Assets - Carrying Amount of Goodwill (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2020
USD ($)
Goodwill [Roll Forward]  
Goodwill beginning balance $ 480,065
Acquisitions 58,315
Foreign currency translation adjustments 3,935
Other adjustments (76)
Goodwill ending balance $ 542,239