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				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Stock-based compensation	$ 38,262	[1]	$ 20,753	[1]	$ 68,819	[1]	$ 38,637	[1]
Cost Of Services Revenues [Member]
Stock-based compensation	507		396		957		664
Research And Development [Member]
Stock-based compensation	14,055		6,181		25,199		11,866
Sales, Marketing And Services [Member]
Stock-based compensation	13,307		7,152		23,277		13,184
General And Administrative [Member]
Stock-based compensation	$ 10,393		$ 7,024		$ 19,386		$ 12,923

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