Employee Stock-Based Compensation and Benefit Plans (Detail of the Total Stock-Based Compensation Recognized by Income Statement Classification) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation	[1]	$ 147,368	$ 169,287	$ 183,941
Cost of services and maintenance revenues
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation		2,940	2,560	2,540
Research and development
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation		47,723	55,560	63,448
Sales, marketing and services
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation		49,315	61,925	65,549
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation		$ 47,390	$ 49,242	$ 52,404

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