Geographic Information - Property and Equipment, Net and Operating Lease Assets, Presented by Principal Geographic Area (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Revenues From External Customers And Long Lived Assets [Line Items]
Property and equipment, net and operating lease assets	$ 314,034	$ 237,461
U.S.
Revenues From External Customers And Long Lived Assets [Line Items]
Property and equipment, net and operating lease assets	212,064	157,245
International
Revenues From External Customers And Long Lived Assets [Line Items]
Property and equipment, net and operating lease assets	$ 101,970	$ 80,216