| **Derivative Financial Instruments Impact of Netting Agreements (Details) - USD ($) $ in Thousands** | 9 Months Ended |            |
|------------------------------------------------------------------------------------------------------|----------------|------------|
||
| **Derivatives, Fair Value**                                                                          |           |       |
| Gain on early settlement of derivative basis protection positions                                    | $ 11,300       |       |
| **Derivative Asset:**                                                                                |           |       |
| Derivative assets, gross                                                                             | (11,504)       | $ (14,338) |
| Effect of master netting agreements                                                                  | 11,451         | 14,173     |
| Derivative asset, net                                                                                | 53             | 165        |
| **Derivative Liability:**                                                                            |           |       |
| Derivative liability, gross                                                                          | 266,026        | 101,645    |
| Effect of master netting agreements                                                                  | (11,451)       | (14,173)   |
| Derivative liability, net                                                                            | 254,575        | $ 87,472   |
| Crude Oil [Member]                                                                                   |           |       |
| **Derivatives, Fair Value**                                                                          |           |       |
| Gain on early settlement of derivative basis protection positions                                    | 10,300         |       |
| Natural Gas [Member]                                                                                 |           |       |
| **Derivatives, Fair Value**                                                                          |           |       |
| Gain on early settlement of derivative basis protection positions                                    | $ 1,000        |       |

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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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Gain on early settlement of derivative basis protection positions
+ References
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| - Definition
Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.
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| - Definition
Fair value, after offset of derivative liability, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.
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| - Definition
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Fair value, after offset of derivative asset, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be and before offset against a right to receive collateral under a master netting arrangement. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.
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| - Definition
Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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