DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Gains or Losses Related to Changes in Fair Value and Cash Settlements on Derivatives Not Qualifying as Hedging Instruments (Details) - Not Designated as Hedging Instrument - Commodity contracts - USD ($) $ in Thousands	2 Months Ended	3 Months Ended
	Feb. 28, 2017	Mar. 31, 2018	Mar. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Cash settlements		$ (3,429)	$ 161
Change in fair value		(6,119)	2,485
Total gains (losses) on non-qualifying hedges		$ (9,548)	$ 2,646
Predecessor
Derivative Instruments, Gain (Loss) [Line Items]
Cash settlements	$ 0
Change in fair value	(1,778)
Total gains (losses) on non-qualifying hedges	$ (1,778)