STOCKHOLDERS’ EQUITY - Schedule of Share-based Compensation, Net of Amount Capitalized (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 12,719	$ 14,917	$ 38,943	$ 45,812
Total share-based compensation expense, before income taxes	12,719	14,917	38,943	45,812
Tax benefit	(2,884)	(3,760)	(8,557)	(10,005)
Total share-based compensation expense, net of income taxes	9,835	11,157	30,386	35,807
Cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	1,560	1,605	4,357	4,892
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	3,418	4,632	10,569	13,744
Selling, general and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 7,741	$ 8,680	$ 24,017	$ 27,176