|**Fair Value Measurements and Disclosures (Tables)**                                                                             | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
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|**Fair Value Disclosures [Abstract]**                                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]                                     | Long-term Debt.The portion of our long-term debt related to our revolving credit facility approximates fair value, as the applicable interest rates are variable and reflective of market rates. We have elected not to account for the portion of our debt related to our senior notes under the fair value option; however, we have determined an estimate of the fair values based on measurements of trading activity and broker or dealer quotes, which are published market prices, and therefore are Level 2 inputs. The table below presents these estimates of the fair value of the portion of our long-term debt related to our senior notes as of the dates indicated:March 31, 2023December 31, 2022Nominal InterestEstimated Fair ValuePercent of ParEstimated Fair ValuePercent of Par(in millions)(in millions)2024 Senior Notes6.125%$199.699.8%$198.499.2%2026 Senior Notes5.75%732.897.7%716.095.5%                                                                                                                                                                                                                            
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|2024 Senior Notes                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|2026 Senior Notes                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis                                                       | Our crude oil and natural gas fixed-price exchanges and basis exchanges are included in Level 2. Our collars are included in Level 3. The following table presents, for each applicable level within the fair value hierarchy, our derivative assets and liabilities, including both current and non-current portions, measured at fair value on a recurring basis as of the dates indicated:March 31, 2023December 31, 2022Condensed Consolidated Balance Sheet Line ItemSignificant OtherObservableInputs(Level 2)SignificantUnobservableInputs(Level 3)TotalSignificant OtherObservableInputs(Level 2)SignificantUnobservableInputs(Level 3)Total(in thousands)Derivative assetsCurrentFair value of derivatives$38,181$29,963$68,144$9,178$22,785$31,963Non-currentFair value of derivatives36,7509,74746,49720,4395,12325,562Total$74,931$39,710$114,641$29,617$27,908$57,525Derivative liabilitiesCurrentFair value of derivatives$(97,328)$(28,201)$(125,529)$(214,171)$(60,047)$(274,218)Non-currentFair value of derivatives(22,424)(6,595)(29,019)(49,749)(3,851)(53,600)Total$(119,752)$(34,796)$(154,548)$(263,920)$(63,898)$(327,818)
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|                                                                                                                                 | Condensed Consolidated Balance Sheet Line Item                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
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|Derivative assets                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Current                                                                                                                          | Fair value of derivatives                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Non-current                                                                                                                      | Fair value of derivatives                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Total                                                                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
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|Derivative liabilities                                                                                                           |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Current                                                                                                                          | Fair value of derivatives                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Non-current                                                                                                                      | Fair value of derivatives                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Total                                                                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Fair Value Assets and Liabilities Unobservable Input Reconciliation                                                              | The following table presents a reconciliation of our Level 3 commodity derivative assets and liabilities measured at fair value for the periods presented:Three Months Ended March 31,20232022(in thousands)Fair value of Level 3 instruments, net asset (liability) beginning of period$(35,990)$(62,540)Changes in fair value included on condensed consolidated statements of operations line item:Commodity price risk management gain (loss), net40,796(209,771)Settlements included on condensed consolidated statement of operations line items:Commodity price risk management gain (loss), net10846,100Fair value of Level 3 instruments, net asset (liability) end of period$4,914$(226,211)Net change in fair value of Level 3 unsettled derivatives included on condensed consolidated statements of operations line item:Commodity price risk management gain (loss), net$33,490$(159,118)                                                                                                                                                                                                                                           
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|Fair value of Level 3 instruments, net asset (liability) beginning of period                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Changes in fair value included on condensed consolidated statements of operations line item:                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Commodity price risk management gain (loss), net                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Settlements included on condensed consolidated statement of operations line items:                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Commodity price risk management gain (loss), net                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Fair value of Level 3 instruments, net asset (liability) end of period                                                           |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
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|Net change in fair value of Level 3 unsettled derivatives included on condensed consolidated statements of operations line item: |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Commodity price risk management gain (loss), net                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

X- DefinitionTabular disclosure of the fair value measurement of assets and liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets or net liabilities), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of asset or liability.
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