Segment Information (Revenues By Product Grouping) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net revenues	$ 3,217,170	$ 3,236,700	$ 3,010,564
Workspace
Segment Reporting Information [Line Items]
Net revenues	2,425,640	2,402,587	2,127,350
App Delivery and Security
Segment Reporting Information [Line Items]
Net revenues	695,144	720,749	750,268
Professional services
Segment Reporting Information [Line Items]
Net revenues	$ 96,386	$ 113,364	$ 132,946