SEGMENT INFORMATION SEGMENT INFORMATION (SUMMARY OF DERIVATIVE INFORMATION) (Details) - Commodities futures and options $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Segment Reporting Information [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (171,753)
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(163,238)
Operating Segments
Segment Reporting Information [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (8,515)