Stock-Based Compensation (Detail Of The Total Stock-Based Compensation Recognized By Income Statement Classification) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Stock-based compensation	$ 40,103	[1]	$ 24,954	[1]	$ 108,922	[1]	$ 63,591	[1]
Cost Of Services Revenues [Member]
Stock-based compensation	567		448		1,524		1,112
Research And Development [Member]
Stock-based compensation	14,523		9,599		39,722		21,465
Sales, Marketing And Services [Member]
Stock-based compensation	13,977		8,434		37,254		21,618
General And Administrative [Member]
Stock-based compensation	$ 11,036		$ 6,473		$ 30,422		$ 19,396

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