DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS, Location of Assets and Liabilities with the Consolidated Balance Sheets (Details) (Derivatives Not Designated as Hedging Instruments [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Derivative Instruments, Fair Value [Abstract]
Asset derivatives	$ 20,454	$ 3,385
Liability derivatives	50,584	146,947
Prepaid Forward Contracts [Member] | Current Derivative Contracts [Member]
Derivative Instruments, Fair Value [Abstract]
Asset derivatives	0	0
Liability derivatives	49,633	99,577
Prepaid Forward Contracts [Member] | Long-Term Derivative Contracts [Member]
Derivative Instruments, Fair Value [Abstract]
Asset derivatives	20,454	3,385
Liability derivatives	$ 951	$ 47,370