Supplemental Information on Oil and Gas Exploration and Production Activities (Unaudited) - Results of Operations for Producing Activities (Details) |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2020
USD ($)
usd_per_mcf
|
Dec. 31, 2019
USD ($)
usd_per_mcf
|
Dec. 31, 2018
USD ($)
usd_per_mcf
|
|
| Extractive Industries [Abstract] | |||
| Revenues | $ 801,251,000 | $ 1,354,766,000 | $ 1,675,180,000 |
| Production costs | (537,609,000) | (620,412,000) | (611,965,000) |
| Depletion | (229,702,000) | (539,379,000) | (476,517,000) |
| Impairment | (1,357,099,000) | (2,039,770,000) | 0 |
| Income tax (expense) benefit | (7,290,000) | 7,563,000 | 68,000 |
| Results of operations from producing activities | $ (1,330,449,000) | $ (1,837,232,000) | $ 586,766,000 |
| Depletion per Mcf of gas equivalent (usd per Mcfe) | usd_per_mcf | 0.61 | 1.08 | 0.96 |
| X | ||||||||||
- Definition Depletion per MCF of Gas Equivalent No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Depreciation, depletion and amortization, and valuation provisions (impairments) related to oil and gas producing activities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Income tax expense for oil and gas producing activities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The results of operations for oil and gas producing activities, excluding corporate overhead and interest costs. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Production (lifting) costs from oil and gas producing activities, including but not limited to lease operating expense, production and ad valorem taxes, and transportation expense. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Total revenues from oil and gas producing activities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|