|**Properties and Equipment (Tables)**                                 | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
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|**Oil and Gas Property [Abstract]**                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|Property, Plant and Equipment [Table Text Block]                      | The following table presents the components of properties and equipment, net of accumulated depreciation, depletion and amortization (“DD&A”), as of the dates indicated:December 31,20222021(in thousands)Properties and equipment, net:Crude oil and natural gas propertiesProved$11,324,756$8,310,018Unproved156,418306,181Total crude oil and natural gas properties11,481,1748,616,199Equipment and other72,15163,099Land and buildings25,40619,928Construction in progress716,302371,968Properties and equipment, at cost12,295,0339,071,194Accumulated DD&A(5,001,678)(4,256,329)Properties and equipment, net$7,293,355$4,814,865
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|                                                                      | December 31,                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|                                                                      | 2022                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|                                                                      | (in thousands)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|Properties and equipment, net:                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|Crude oil and natural gas properties                                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|Proved                                                                | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|Unproved                                                              | 156,418                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|Total crude oil and natural gas properties                            | 11,481,174                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Equipment and other                                                   | 72,151                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Land and buildings                                                    | 25,406                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Construction in progress                                              | 716,302                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|Properties and equipment, at cost                                     | 12,295,033                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Accumulated DD&A                                                      | (5,001,678)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|Properties and equipment, net                                         | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|Impairment of natural gas and crude oil properties [Table Text Block] | The following table presents impairment charges recorded for properties and equipment for the periods presented:Year Ended December 31,202220212020(in thousands)Impairment of proved and unproved properties$6,762$402$881,238Impairment of infrastructure and other——1,155Total impairment of properties and equipment$6,762$402$882,393                                                                                                                                                                                                                                                                                               
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|                                                                      | Year Ended December 31,                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|                                                                      | 2022                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|                                                                      | (in thousands)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|Impairment of proved and unproved properties                          | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|Impairment of infrastructure and other                                | —                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|Total impairment of properties and equipment                          | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        

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