Revenue from Contracts with Customers - Summary of Revenue disaggregated Based on Geographic Location (Detail) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation Of Revenue [Line Items]
Total revenue	$ 503,332	$ 503,332	$ 345,293	$ 1,358,787	$ 917,196
United States [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	311,966		212,567	831,369	578,828
All Other Countries [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 191,366		$ 132,726	$ 527,418	$ 338,368