Supplemental Information on Oil and Natural Gas Properties (Unaudited) (Capitalized Costs) (Details) - USD ($) $ in Thousands |
Dec. 31, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Oil and Gas Exploration and Production Industries Disclosures [Abstract] | ||
| Evaluated properties | $ 4,585,020 | $ 3,429,570 |
| Unevaluated properties | 1,404,513 | 1,168,016 |
| Total oil and natural gas properties | 5,989,533 | 4,597,586 |
| Accumulated depreciation, depletion, amortization and impairment | (2,270,675) | (2,084,095) |
| Total oil and natural gas properties, net | $ 3,718,858 | $ 2,513,491 |
| X | ||||||||||
- Definition Total oil and gas properties. No definition available.
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- Definition Oil and Gas Properties, Gross No definition available.
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- Definition Amount of accumulated depreciation, depletion, amortization and valuation allowance relating to oil and gas producing activities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Capitalized costs of proved properties incurred for any combination mineral interests acquisitions; wells and related equipment; support equipment and facilities; and uncompleted wells and equipment and other costs not previously disclosed within this table. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Capitalized costs of unproved properties incurred for any combination mineral interests acquisitions and other costs not previously disclosed within this table. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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