DERIVATIVE COMMODITY INSTRUMENTS - Reclassification (Details)	12 Months Ended
	Dec. 31, 2016 MBbls Bcf MMgals $ / Mcf $ / bbl $ / gal
NYMEX Swaps | Oil | Production Period, Year One
Derivatives, Fair Value [Line Items]
Total Hedged Volumes (in MBbl and Bcf) | MBbls	6,060
Average Contract Price (in uadPerbbl, usdPergal and usdPerMcf)	49.77
NYMEX Swaps | Natural Gas | Production Period, Year One
Derivatives, Fair Value [Line Items]
Total Hedged Volumes (in MBbl and Bcf) | MBbls	0.9
Average Contract Price (in uadPerbbl, usdPergal and usdPerMcf)	3.29
NYMEX Three-Way Collars | Oil | Production Period, Year One
Derivatives, Fair Value [Line Items]
Total Hedged Volumes (in MBbl and Bcf) | MBbls	4,800
NYMEX Three-Way Collars | Oil | Production Period, Year Two
Derivatives, Fair Value [Line Items]
Total Hedged Volumes (in MBbl and Bcf) | MBbls	3,240
WTI/WTI Basis Swaps | Oil | Production Period, Year One
Derivatives, Fair Value [Line Items]
Total Hedged Volumes (in MBbl and Bcf) | MBbls	7,890
Average Contract Price (in uadPerbbl, usdPergal and usdPerMcf)	(0.58)
Liquids Swaps | Natural Gas Liquids | Production Period, Year One
Derivatives, Fair Value [Line Items]
Total Hedged Volumes (in MBbl and Bcf) | MMgals	45.4
Average Contract Price (in uadPerbbl, usdPergal and usdPerMcf) | $ / gal	0.52
Liquids Swaps | Natural Gas Liquids | Production Period, Year Two
Derivatives, Fair Value [Line Items]
Total Hedged Volumes (in MBbl and Bcf) | MMgals	30.2
Average Contract Price (in uadPerbbl, usdPergal and usdPerMcf) | $ / gal	0.60
Basin Specific Swaps - Permian | Natural Gas | Production Period, Year One
Derivatives, Fair Value [Line Items]
Total Hedged Volumes (in MBbl and Bcf) | Bcf	14.7
Underlying, Derivative (in usdPerMcf) | $ / Mcf	2.85
Permian Swaps | Natural Gas Basis Differential | Production Period, Year One
Derivatives, Fair Value [Line Items]
Total Hedged Volumes (in MBbl and Bcf) | Bcf	0.9
Underlying, Derivative (in usdPerMcf) | $ / Mcf	(0.29)
Short | Ceiling sold price (call) | Oil | Production Period, Year One
Derivatives, Fair Value [Line Items]
Derivative, Cap Price (in usdPerbbl)	62.18
Short | Ceiling sold price (call) | Oil | Production Period, Year Two
Derivatives, Fair Value [Line Items]
Derivative, Cap Price (in usdPerbbl)	65.03
Short | Floor purchased/sold price (put) | Oil | Production Period, Year One
Derivatives, Fair Value [Line Items]
Derivative, Floor Price (in usdPerbbl)	35.00
Short | Floor purchased/sold price (put) | Oil | Production Period, Year Two
Derivatives, Fair Value [Line Items]
Derivative, Floor Price (in usdPerbbl)	40.00
Long | Floor purchased/sold price (put) | Oil | Production Period, Year One
Derivatives, Fair Value [Line Items]
Derivative, Floor Price (in usdPerbbl)	45.00
Long | Floor purchased/sold price (put) | Oil | Production Period, Year Two
Derivatives, Fair Value [Line Items]
Derivative, Floor Price (in usdPerbbl)	50.00