Segment Information (Revenues By Product Grouping) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Segment Reporting Information [Line Items]
Net revenues	$ 802,420	$ 712,731	$ 730,384	$ 672,899	$ 739,996	$ 641,422	$ 615,210	$ 589,495	$ 2,918,434		$ 2,586,123		$ 2,206,392
Enterprise and Service Provider division
Segment Reporting Information [Line Items]
Net revenues									2,335,562		2,074,800		1,778,646
Enterprise and Service Provider division | Mobile and Desktop revenues
Segment Reporting Information [Line Items]
Net revenues									1,549,383	[1]	1,450,850	[1]	1,278,798	[1]
Enterprise and Service Provider division | Networking and Cloud revenues
Segment Reporting Information [Line Items]
Net revenues									634,598	[2]	496,608	[2]	385,518	[2]
Enterprise and Service Provider division | Professional services
Segment Reporting Information [Line Items]
Net revenues									138,879	[3]	119,061	[3]	91,496	[3]
Enterprise and Service Provider division | Other
Segment Reporting Information [Line Items]
Net revenues									12,702		8,281		22,834
SaaS division revenues
Segment Reporting Information [Line Items]
Net revenues									$ 582,872		$ 511,323		$ 427,746

[1] Mobile and Desktop revenues are primarily comprised of sales from the Company’s desktop and application virtualization products, XenDesktop and XenApp, and the Company's Mobility products, which include XenMobile and related license updates and maintenance and support.

[2] Networking and Cloud revenues are primarily comprised of sales from the Company’s cloud networking products, which include NetScaler, CloudBridge and ByteMobile Smart Capacity, and the Company’s cloud platform products which include XenServer, CloudPlatform and CloudPortal and related license updates and maintenance and support.

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