Quarterly report pursuant to Section 13 or 15(d)

PROPERTY AND EQUIPMENT (Narrative) (Details)

v3.20.2
PROPERTY AND EQUIPMENT (Narrative) (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
usd_per_mcf
Jun. 30, 2019
USD ($)
usd_per_mcf
Dec. 31, 2019
USD ($)
Property, Plant and Equipment [Abstract]          
Impairment of oil and natural gas properties $ 532,880,000 $ 0 $ 1,086,225,000 $ 0  
Capitalized general and administrative costs 8,200,000 $ 8,800,000 $ 13,600,000 $ 16,500,000  
Depletion per Mcfe of gas equivalent (usd per Mcfe) | usd_per_mcf     0.73 1.00  
Non-producing leasehold costs $ 1,564,189,000   $ 1,564,189,000   $ 1,686,666,000