STOCKHOLDERS’ EQUITY Restricted Stock Units Narrative (Details) (USD $) Share data in Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended	12 Months Ended	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Restricted Stock Units (RSUs) [Member]	Mar. 31, 2014 Restricted Stock Units (RSUs) [Member]	Jun. 30, 2014 Restricted Stock Units (RSUs) [Member]	Dec. 31, 2013 Performance Shares [Member]	Jun. 30, 2014 Performance-based Restricted Stock Unites (RSUs) [Member]	Mar. 31, 2014 Performance-based Restricted Stock Unites (RSUs) [Member]	Jun. 30, 2014 Performance-based Restricted Stock Unites (RSUs) [Member]	Dec. 31, 2013 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					$ 90,100,000		$ 90,100,000
Weighted-average period of recognition of unearned compensation expense of unvested awards (in years)							2 years 18 days
Restricted stock units issued								1,000
Stock-based compensation expense	$ 15,278,000	$ 7,480,000	$ 30,895,000	$ 22,242,000					$ 900,000		$ 2,000,000
Stock units cancelled in the period (in shares)					532	211			2,559	47		3,300