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Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2020
USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]  
Goodwill, beginning balance $ 761,153
Goodwill acquired 15,311
Foreign currency translation (1,279)
Goodwill, ending balance $ 775,185