STOCKHOLDERS’ EQUITY Restricted Stock Units Narrative (Details) (USD $) Share data in Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended			9 Months Ended	12 Months Ended	3 Months Ended			9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Restricted Stock Units (RSUs) [Member]	Jun. 30, 2014 Restricted Stock Units (RSUs) [Member]	Mar. 31, 2014 Restricted Stock Units (RSUs) [Member]	Sep. 30, 2014 Restricted Stock Units (RSUs) [Member]	Dec. 31, 2013 Performance Shares [Member]	Sep. 30, 2014 Performance-based Restricted Stock Unites (RSUs) [Member]	Jun. 30, 2014 Performance-based Restricted Stock Unites (RSUs) [Member]	Mar. 31, 2014 Performance-based Restricted Stock Unites (RSUs) [Member]	Sep. 30, 2014 Performance-based Restricted Stock Unites (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unearned stock-based compensation expense related to unvested awards					$ 123,700,000			$ 123,700,000
Weighted-average period of recognition of unearned compensation expense of unvested awards (in years)								2 years 3 months 29 days
Restricted stock units issued									1,000
Stock-based compensation expense	$ 14,917,000	$ 8,094,000	$ 45,812,000	$ 30,336,000						$ 700,000			$ 2,700,000
Stock units cancelled in the period (in shares)					366	532	211			28	2,559	47