STOCKHOLDERS’ EQUITY - Schedule of Share-based Compensation, Net of Amount Capitalized (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 12,537	$ 15,278	$ 26,224	$ 30,895
Total share-based compensation expense, before income taxes	12,537	15,278	26,224	30,895
Tax benefit	(2,806)	(3,320)	(5,673)	(6,244)
Total share-based compensation expense, net of income taxes	9,731	11,958	20,551	24,651
Cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	1,682	1,971	2,797	3,287
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	3,573	4,383	7,151	9,112
Selling, general and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 7,282	$ 8,924	$ 16,276	$ 18,496