SUPPLEMENTAL OIL AND GAS INFORMATION (UNAUDITED) - Standardized Measure of Discounted Future Net Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Roll Forward]
Beginning of Period	$ 712,011	$ 1,678,061	$ 1,879,643
Sales of Oil and Natural Gas Produced, Net of Production Costs	(727,317)	(177,932)	(424,548)
Extensions and Discoveries	258,399	52,232	282,528
Previously Estimated Development Cost Incurred During the Period	85,526	78,633	100,987
Net Change of Prices and Production Costs	1,366,197	(815,278)	(680,119)
Change in Future Development Costs	(103,806)	(150,991)	(174,729)
Revisions of Quantity and Timing Estimates	607,774	(280,481)	(226,721)
Accretion of Discount	71,254	182,202	218,023
Change in Income Taxes	(450,455)	143,438	156,621
Purchases of Minerals in Place	940,910	0	338,289
Other	129,615	2,127	19,902
End of Period	$ 2,890,109	$ 712,011	$ 1,678,061