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Goodwill and Intangible Assets - Summary of Change in Carrying Amount of Goodwill (Detail)
$ in Thousands
6 Months Ended
Jun. 30, 2019
USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]  
Goodwill, Beginning Balance $ 85,165
Acquisition 157,161
Translation adjustments (61)
Goodwill, Ending Balance $ 242,265