SEGMENT INFORMATION - SCHEDULE OF UNALLOCATED MARK-TO-MARKET (GAINS) LOSSES ON COMMODITY DERIVATIVES (Details) - Commodities futures and options - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reconciling Items
Segment Reporting Information [Line Items]
Net Mark to Market Valuation of Certain Derivative Positions Recognized in Unallocated Derivative Gains (Losses)	$ (28,651)	$ (168,263)	$ (35,292)
Operating Segments
Segment Reporting Information [Line Items]
Net Gain (Loss) On Commodity Derivative Positions Reclassified From Unallocated Derivative To Segment Income	6,837	(98,884)	(91,026)
Non-designated Hedges
Segment Reporting Information [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (35,488)	$ 69,379	$ 55,734