Revenue Recognition - Summary of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 112,282	$ 91,852	$ 322,139	$ 257,537
Subscription revenue
Disaggregation of Revenue [Line Items]
Revenue	96,792	75,503	275,192	209,610
Perpetual license and maintenance revenue
Disaggregation of Revenue [Line Items]
Revenue	12,448	13,797	38,046	40,877
Professional services and other revenue
Disaggregation of Revenue [Line Items]
Revenue	$ 3,042	$ 2,552	$ 8,901	$ 7,050