Revenue - Revenue by Services (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 78,864	$ 60,304
SaaS subscriptions
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	28,390	21,278
Term license subscriptions
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	17,793	9,557
Maintenance and support
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	4,253	3,722
Professional services
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 28,428	$ 25,747