FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Liabilities
Warrants	$ 123,573	$ 127,764
Interest rate swaps	7,183	4,367
Recurring basis | Total Fair Value Measurement
Liabilities
Warrants	123,573	127,764
Interest rate swaps	7,183	4,367
Recurring basis | Significant Other Observable Inputs (Level 2)
Liabilities
Interest rate swaps	7,183	4,367
Recurring basis | Significant Unobservable Inputs (Level 3)
Liabilities
Warrants	$ 123,573	$ 127,764