STOCKHOLDERS’ EQUITY Restricted Stock Units Narrative (Details) (USD $) Share data in Thousands, unless otherwise specified	3 Months Ended				12 Months Ended	3 Months Ended	0 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Restricted Stock Units (RSUs) [Member]	Mar. 31, 2013 Restricted Stock Units (RSUs) [Member]	Dec. 31, 2013 Performance Shares [Member]	Mar. 31, 2014 Performance-based Restricted Stock Unites (RSUs) [Member]	Apr. 30, 2014 Subsequent Event [Member] 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			$ 105,400,000	$ 115,900,000
Weighted-average period of recognition of unearned compensation expense of unvested awards (in years)			2 years 3 days	2 years 4 months
Restricted stock units issued					1,000
Stock-based compensation expense	$ 15,617,000	$ 14,762,000				$ 1,100,000
Stock units cancelled in the period (in shares)			211			47	2,500