| **Impairment of Natural Gas and Crude Oil Properties (Details) $ in Thousands** | 3 Months Ended | 9 Months Ended |
|---------------------------------------------------------------------------------|----------------|----------------|
||
| **Impairment of natural gas and crude oil properties [Line Items]**             |           |           |   |   |
| Impairment of properties and equipment                                          | $ 1,488        | $ 252,740      | $ 194,230 | $ 282,499 |
| Impairment of Leasehold                                                         | 1,488          | 252,623        | 194,146 | 282,188 |
| Delaware Basin Unproved Property Impairment                                     |           |           | 6,300 |   |
| Amortization of Individually Insignificant Unproved Properties                  | 0              | 117            | 84 | 311 |
| Impairment of Oil and Gas Properties                                            | $ 1,488        | $ 252,740      | 194,230 | 282,499 |
| Impairment of properties and equipment                                          |           |           | $ 194,230 | $ 282,499 |
| Delaware Basin [Member]                                                         |           |           |   |   |
| **Impairment of natural gas and crude oil properties [Line Items]**             |           |           |   |   |
| Viable drilling locations, not impaired                                         | 450            |           | 450 |   |

| X                                                                                                                                                                                                                                                                                                              |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amortization of Individually Insignificant Unproved Properties
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                         |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Delaware Basin Unproved Property Impairment
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                 |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
[Line Items] for Impairment of natural gas and crude oil properties [Table]
+ References
No definition available.
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| X                                                                                                                                                                                                                                                           |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Viable drilling locations, not impaired
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The adjustment to reduce the value of existing agreements that specify the lessee's rights to use the leased property. This expense is charged when the estimates of future profits generated by the leased property are reduced.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - 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.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Costs related to the impairment of oil and gas properties.
+ References
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