Employee Benefit Plans - Summary of Stock-based Compensation Expense Recognized in Financial Statements (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense, net of amounts capitalized	$ 19,471	$ 15,154	$ 36,973	$ 30,265
Capitalized stock-based compensation expense	710	1,078	1,486	2,031
Stock-based compensation expense	20,181	16,232	38,459	32,296
Cost of revenue
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense, net of amounts capitalized	1,047	991	2,007	2,087
Research and development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense, net of amounts capitalized	7,496	5,629	13,953	10,395
Sales and marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense, net of amounts capitalized	4,841	3,016	9,184	5,796
General and administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense, net of amounts capitalized	$ 6,087	$ 5,518	$ 11,829	$ 11,987