SUPPLEMENTAL INFORMATION ON OIL AND NATURAL GAS OPERATIONS (Unaudited) - Oil and Natural Gas Reserves (Details) bbl in Thousands, Mcf in Thousands	12 Months Ended
	Dec. 31, 2019 Mcf bbl	Dec. 31, 2018 Mcf bbl	Dec. 31, 2017 Mcf bbl	Dec. 31, 2016 Mcf bbl
Oil
Proved Developed and Undeveloped Reserves (Volume)
Beginning of the period	626,936	233,181	139,174
Extensions and discoveries	256,569	143,256	99,980
Revisions of previous estimates	(84,789)	3,689	(7,715)
Purchase of reserves in place	13,974	281,333	24,322
Divestitures	(33,269)	(156)	(1,163)
Production	(68,518)	(34,367)	(21,417)
End of the period	710,903	626,936	233,181
Proved Developed Reserves (Volume)	457,083	403,051	141,246	79,457
Proved Undeveloped Reserve (Volume)	253,820	223,885	91,935	59,717
Natural Gas Liquids
Proved Developed and Undeveloped Reserves (Volume)
Beginning of the period	190,291	54,609	37,134
Extensions and discoveries	66,572	33,152	20,825
Revisions of previous estimates	(8,166)	11,138	(1,466)
Purchase of reserves in place	3,813	98,865	2,633
Divestitures	(3,809)	(8)	(461)
Production	(18,498)	(7,465)	(4,056)
End of the period	230,203	190,291	54,609
Proved Developed Reserves (Volume)	165,173	125,509	35,412	22,080
Proved Undeveloped Reserve (Volume)	65,030	64,782	19,198	15,054
Natural Gas
Proved Developed and Undeveloped Reserves (Volume)
Beginning of the period | Mcf	1,048,649	285,369	174,896
Extensions and discoveries | Mcf	318,874	154,088	109,032
Revisions of previous estimates | Mcf	(149,657)	3,642	(10,065)
Purchase of reserves in place | Mcf	19,830	640,761	34,640
Divestitures | Mcf	(21,272)	(543)	(2,474)
Production | Mcf	(97,613)	(34,668)	(20,660)
End of the period | Mcf	1,118,811	1,048,649	285,369
Proved Developed Reserves (Volume) | Mcf	824,760	705,084	190,740	105,399
Proved Undeveloped Reserve (Volume) | Mcf	294,051	343,565	94,629	69,497