Segment Information (Net Revenues And Profit By Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013 segment		Jun. 30, 2012
Number of reportable segments					2
Net revenues	$ 730,384		$ 615,210		$ 1,403,283		$ 1,204,705
Segment profit	75,888		82,192		132,496		162,942
Amortization of intangible assets	(34,860)	[1]	(22,294)	[1]	(69,987)	[1]	(49,296)	[1]
Net interest and other income	1,375	[1]	3,353	[1]	2,571	[1]	7,153	[1]
Stock-based compensation	(47,857)	[1]	(38,262)	[1]	(91,413)	[1]	(68,819)	[1]
Consolidated income before income taxes	77,263		85,545		135,067		170,095
Infrastructure [Member]
Net revenues	586,526		489,700		1,121,859		958,462
Segment profit	132,591		123,776		245,847		240,949
SaaS [Member]
Net revenues	143,858		125,510		281,424		246,243
Segment profit	$ 26,014		$ 18,972		$ 48,049		$ 40,108

[1] Represents expenses presented to management on a consolidated basis only and not allocated to the operating segments.