SUPPLEMENTAL OIL AND GAS DISCLOSURES (Unaudited) (Costs Incurred in Oil and Natural Gas Acquisition, Exploration and Development Activities) (Details) - USD ($)	1 Months Ended	11 Months Ended	12 Months Ended
	Feb. 08, 2018	Dec. 31, 2018	Dec. 31, 2019
Costs Incurred in Oil and Natural Gas Acquisition, Exploration and Development Activities
Property acquisition costs, unproved properties	$ 4,240,000	$ 54,587,000	$ 0
Property acquisition costs, proved properties	327,000	16,300,000	0
Costs incurred, exploration	3,678,000	32,130,000	7,305,000
Costs incurred, development	37,672,000	664,138,000	134,908,000
Costs Incurred, Total	45,917,000	767,155,000	142,213,000
Costs Incurred, Additional Information [Abstract]
Unproven leasehold acquisition cost		22,300,000
Additions to asset retirement obligations	$ 0	$ 5,600,000	$ 900,000