Segment and Major Customers Information - Revenue by Product (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Revenue	$ 229,900	$ 217,608	$ 454,622	$ 428,152
Product and related subscription and support
Segment Reporting Information [Line Items]
Revenue	103,804	117,490	209,492	235,938
Platform, cloud subscription and managed services
Segment Reporting Information [Line Items]
Revenue	73,501	56,612	141,896	108,067
Professional services
Segment Reporting Information [Line Items]
Revenue	$ 52,595	$ 43,506	$ 103,234	$ 84,147