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PROPERTY AND EQUIPMENT (Schedule of Property and Equipment) (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
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Property, Plant and Equipment [Abstract] |  |
Oil and natural gas properties | $ 10,786,305 | $ 10,595,735
Accumulated DD&A and impairment | (8,735,750) | (7,191,957)
Oil and natural gas properties, net | 2,050,555 | 3,403,778
Other depreciable property and equipment | 91,101 | 91,198
Land | 4,820 | 5,521
Accumulated DD&A | (43,954) | (36,703)
Other property and equipment, net | 51,967 | 60,016
Property and equipment, net | $ 2,102,522 | $ 3,463,794

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- Definition Amount before accumulated depletion of real estate held for productive use, excluding land held for sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121566466&loc=d3e6812-107765 + Details
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