Quarterly report pursuant to Section 13 or 15(d)

PROPERTY AND EQUIPMENT (Narrative) (Details)

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PROPERTY AND EQUIPMENT (Narrative) (Details) - USD ($)
1 Months Ended 2 Months Ended 3 Months Ended 5 Months Ended 6 Months Ended
Jun. 30, 2021
May 17, 2021
Jun. 30, 2020
May 17, 2021
Jun. 30, 2020
Property, Plant and Equipment [Abstract]          
Impairment of oil and natural gas properties $ 117,813,000 $ 0 $ 532,880,000 $ 0 $ 1,086,225,000
Capitalized general and administrative costs $ 2,200,000 $ 2,500,000 $ 8,200,000 8,000,000.0 $ 13,600,000
Impairment of corporate headquarters       $ 14,600,000