Goodwill and Intangible Assets - Summary of Changes in Carrying Amount of Goodwill (Detail) $ in Thousands	9 Months Ended
Sep. 30, 2021 USD ($)
Goodwill [Line Items]
Goodwill as of December 31, 2020	$ 831,800
Foreign currency translation adjustment	(1,121)
Goodwill as of September 30, 2021	$ 830,679

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
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