FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 2)-K (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of the beginning and ending balances of the fair value measurements using significant unobservable inputs (Level 3)
Unrealized losses			$ 73,800,000
Settlements made in cash			80,500,000
Issuance of warrants to purchase common stock (in shares)			1,525,272
Fair Value, Inputs, Level 3 [Member]
Reconciliation of the beginning and ending balances of the fair value measurements using significant unobservable inputs (Level 3)
Marketability discount due to lapses of restriction period	0
Warrant [Member] | Fair Value, Inputs, Level 3 [Member]
Reconciliation of the beginning and ending balances of the fair value measurements using significant unobservable inputs (Level 3)
Balance at the beginning of the period	305,560,000	123,573,000	127,764,000
Warrant liability loss	60,520,000	181,987,000	185,017,000
Settlements			(189,208,000)
Balance at the end of the period	$ 366,080,000	$ 305,560,000	$ 123,573,000
Expected Volatility (as a percent)	24.50%
Warrant [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
Reconciliation of the beginning and ending balances of the fair value measurements using significant unobservable inputs (Level 3)
Discount for lack of marketability (as a percent)	18.00%	29.00%
Warrant [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
Reconciliation of the beginning and ending balances of the fair value measurements using significant unobservable inputs (Level 3)
Discount for lack of marketability (as a percent)	20.00%	30.00%