Property Acquisitions and Divestitures - Narrative (Details)
 3 Months Ended 9 Months Ended 12 Months Ended 24 Months Ended
Mar. 02, 2018
USD ($)
a
Wells
Feb. 08, 2018
USD ($)
a
Jun. 08, 2017
USD ($)
a
Wells
Dec. 28, 2016
USD ($)
a
Wells
Jun. 03, 2016
USD ($)
a
Wells
Dec. 31, 2018
USD ($)
a
Dec. 31, 2016
USD ($)
Oct. 10, 2016
USD ($)
Dec. 31, 2018
USD ($)
a
Dec. 31, 2017
USD ($)
Dec. 31, 2018
USD ($)
a
Dec. 21, 2017
USD ($)
Business Acquisition [Line Items]                        
Acquisition of oil and natural gas properties             $ 849,642,000   $ 212,513,000 $ 435,547,000    
Allocated to unproved properties           $ 1,680,065,000     1,680,065,000 1,952,680,000 $ 1,680,065,000  
Allocated to proved properties           2,895,280,000     2,895,280,000 1,602,002,000 2,895,280,000  
Proceeds from sale of undeveloped acres             0   148,149,000 $ 22,496,000    
Undeveloped Acreage and Oil and Gas Producing Properties From Silverback Exploration, LLC                        
Business Acquisition [Line Items]                        
Acquisition of oil and natural gas properties       $ 855,000,000                
Number of horizontal wells acquired (in wells) | Wells       31                
Gas and oil area, area offset by existing acreage (in acres) | a       35,500                
Gas and oil area, gross offset existing acreage (in acres) | a       43,500                
Gas and oil area, operated by company, percent       90.00%                
Gas and oil area, working interest, percent       90.00%                
Total purchase price consideration                 867,772,000      
Payable to silverback             $ 32,300,000          
Adjustment to provisional amounts                     300,000  
Proved properties           116,700,000     116,700,000   116,700,000  
Predecessor                        
Business Acquisition [Line Items]                        
Acquisition of oil and natural gas properties               $ 55,564,000        
Proceeds from sale of undeveloped acres               $ 0        
Predecessor | Unproved And Proved Properties In The Delaware Basin                        
Business Acquisition [Line Items]                        
Undeveloped net acres acquired | a         1,580              
Number of horizontal wells acquired (in wells) | Wells         4              
Total purchase price consideration         $ 32,979,000              
Proved properties         $ 15,374,000              
Northern Delaware Basin                        
Business Acquisition [Line Items]                        
Undeveloped net acres acquired | a   4,000                    
Acquisition of oil and natural gas properties   $ 94,700,000 $ 350,100,000                  
Gas and oil area, average working interest percentage   92.00%                    
Amount placed in escrow                       $ 8,600,000
Settlement adjustments                 300,000      
Net purchase price of undeveloped acres                 182,300,000      
Allocated to unproved properties           142,500,000     142,500,000   142,500,000  
Allocated to proved properties     53,200,000     39,800,000     39,800,000   39,800,000  
Transaction costs     $ 500,000     $ 200,000     $ 200,000   $ 200,000  
Number of horizontal wells acquired (in wells) | Wells     36                  
Gas and oil area, area offset by existing acreage (in acres) | a     11,850                  
Gas and oil area, gross offset existing acreage (in acres) | a     14,770                  
Gas and oil area, operated by company, percent     79.00%                  
Gas and oil area, working interest, percent     85.00%                  
Northern Delaware Basin | Scenario, Previously Reported                        
Business Acquisition [Line Items]                        
Acquisition of oil and natural gas properties     $ 350,000,000                  
Northern Delaware Basin | Restatement Adjustment                        
Business Acquisition [Line Items]                        
Acquisition of oil and natural gas properties     100,000                  
Allocated to unproved properties     $ 296,900,000                  
Lea County, New Mexico and Reeves County                        
Business Acquisition [Line Items]                        
Undeveloped net acres acquired | a           2,900     2,900   2,900  
Acquisition of oil and natural gas properties           $ 87,900,000            
Reeves County                        
Business Acquisition [Line Items]                        
Undeveloped net acres acquired | a 8,600                      
Number wells sold (in wells) | Wells 12                      
Proceeds from sale of undeveloped acres $ 140,700,000                      
Average working interest percentage 32.00%                      
Gain (loss) on sale of oil and gas properties $ 0