Net Income Per Share Attributable To Citrix Systems, Inc. Stockholders (Net Income Per Share Basic And Diluted) (Details) (USD $) In Thousands, except Per Share data, 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
Numerator:
Net income attributable to Citrix Systems, Inc. stockholders	$ 138,644	$ 76,730	$ 64,461	$ 59,688	$ 114,029	$ 78,245	$ 92,006	$ 68,267	$ 339,523	$ 352,547	$ 356,322
Denominator:
Denominator for basic earnings per share - weighted-average shares outstanding									186,672	186,722	187,315
Effect of dilutive employee stock awards:
Employee stock awards									1,573	2,407	3,326
Denominator for diluted earnings per share - weighted-average shares outstanding									188,245	189,129	190,641
Net income per share attributable to Citrix Systems, Inc. stockholders - basic (in dollars per share)	$ 0.75	$ 0.41	$ 0.34	$ 0.32	$ 0.61	$ 0.42	$ 0.49	$ 0.37	$ 1.82	$ 1.89	$ 1.90
Net income per share attributable to Citrix Systems, Inc. stockholders - diluted (in dollars per share)	$ 0.74	$ 0.41	$ 0.34	$ 0.32	$ 0.60	$ 0.41	$ 0.49	$ 0.36	$ 1.80	$ 1.86	$ 1.87
Anti-dilutive weighted-average shares									3,647	3,464	2,576