Segment Information (Revenues By Product Grouping) (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Segment Reporting Information [Line Items]
Net revenues		$ 801,870	$ 732,476	$ 742,365	$ 697,192	$ 777,857	$ 690,925	$ 693,227	$ 662,677	$ 2,973,903	$ 2,824,686	[1],[2]	$ 2,736,080	[1],[2]
Digital workspace
Segment Reporting Information [Line Items]
Net revenues	[3]									2,024,289	1,901,952	[2]	1,821,739	[2]
Networking
Segment Reporting Information [Line Items]
Net revenues	[4]									817,193	790,434	[2]	782,875	[2]
Professional services
Segment Reporting Information [Line Items]
Net revenues	[5]									$ 132,421	$ 132,300	[2]	$ 131,466	[2]
Net revenues | Arrow Group | Customer concentration risk
Segment Reporting Information [Line Items]
Concentration risk percentage										14.00%	12.00%		12.00%

[1] As noted above, prior period amounts have not been adjusted under the modified retrospective method of adoption of therevenue recognition standard. See Note 2 for further information regarding the Company’s adoption of the revenuerecognition standard.

[2] Prior period amounts have not been adjusted under the modified retrospective method of adoption of the revenue recognition standard. See Note 2 for further information regarding the Company’s adoption of the revenue recognition standard.

[3] Digital Workspace revenues are primarily comprised of sales from the Company’s application virtualization solutions, which include Citrix Virtual Apps and Desktops, the Company's unified endpoint management solutions, which include Citrix Endpoint Management, related license updates and maintenance and support, Citrix Content Collaboration, and cloud offerings

[4] Networking revenues primarily include Citrix ADC and Citrix SD-WAN, related license updates and maintenance and support and cloud offerings.

[5] Professional services revenues are primarily comprised of revenues from consulting services and product training and certification services.