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PROPERTY AND EQUIPMENT (Schedule of Property and Equipment) (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
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Property, Plant and Equipment [Abstract] |  |
Oil and natural gas properties | $ 10,730,992 | $ 10,595,735
Accumulated DD&A and impairment | (8,415,756) | (7,191,957)
Oil and natural gas properties, net | 2,315,236 | 3,403,778
Other depreciable property and equipment | 91,317 | 91,198
Land | 5,521 | 5,521
Accumulated DD&A | (41,708) | (36,703)
Other property and equipment, net | 55,130 | 60,016
Property and equipment, net | $ 2,370,366 | $ 3,463,794

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