DERIVATIVES - Open Derivative Positions (Details)	6 Months Ended
	Jun. 30, 2020 MMBTU $ / bbl $ / MMBTU bbl
Oil swaps - WTI Cushing (Bbls)
Derivative [Line Items]
Volume (Bbls) | bbl	184,000
Fixed Price Swap (per Bbl/MMBtu)	27.45
Oil basis swaps - WTI Midland-Cushing (Bbls)
Derivative [Line Items]
Volume (Bbls) | bbl	736,000
Fixed Price Swap (per Bbl/MMBtu)	(2.60)
Collars - WTI (Cushing) 2020
Derivative [Line Items]
Volume (Bbls) | bbl	2,576,000
Floor price (per Bbl)	28.86
Ceiling price (per Bbl)	32.33
Collars - WTI (Cushing) 2021
Derivative [Line Items]
Volume (Bbls) | bbl	3,650,000
Floor price (per Bbl)	30.00
Ceiling price (per Bbl)	43.05
Natural Gas Swaps Waha Hub 2020
Derivative [Line Items]
Volume, energy measure (MMBtu) | MMBTU	4,600,000
Fixed Price Swap (per Bbl/MMBtu) | $ / MMBTU	(2.07)
Deferred Premium Call Options - WTI (Cushing)
Derivative [Line Items]
Volume (Bbls) | bbl	736,000
Premium	1.89
Strike price (per Bbl)	45.00