Revenue from Contracts with Customers - Disaggregation of Revenue (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) division	Mar. 31, 2020 USD ($)
Disaggregation of Revenue [Line Items]
Revenue	$ 842,708	$ 764,302
Number of groups | division	2
Security Technology Group
Disaggregation of Revenue [Line Items]
Revenue	$ 310,219	240,300
Edge Technology Group
Disaggregation of Revenue [Line Items]
Revenue	532,489	524,002
U.S.
Disaggregation of Revenue [Line Items]
Revenue	463,180	428,930
International
Disaggregation of Revenue [Line Items]
Revenue	$ 379,528	$ 335,372