STOCKHOLDERS’ EQUITY Restricted Stock Units, Employee Stock Purchase Plan and Stock Options and Restricted Stock Units (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares authorized	158,000,000
Share available for grant after ratio adjustment	8,800,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 92.1
Number of shares available for issuances	13,831,000	13,611,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	2 years 6 months 14 days
Stock Plan 2005 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share counted against the numerical limit for options available for grant on or after May 9, 2013	1.57
Shares counted against the numerical limit for options available for grant on or after May 18, 2011 (in shares)	1.61
Shares counted against the numerical limit for options available for grant prior to May 18, 2011 (in shares)	1.78