Property Acquisitions and Divestiture - Additional Information (Details)
$ in Thousands
3 Months Ended
Mar. 02, 2018
USD ($)
a
Wells
Feb. 08, 2018
USD ($)
a
Mar. 31, 2018
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Dec. 21, 2017
USD ($)
Business Acquisition [Line Items]            
Gross purchase price of undeveloped net acres     $ 101,753 $ 38,678    
Unproved properties acquired     1,881,979   $ 1,952,680  
Proved properties     1,855,890   $ 1,602,002  
Proceeds from sale     $ 135,481 $ 3,518    
Northern Delaware Basin            
Business Acquisition [Line Items]            
Undeveloped net acres acquired | a   4,000        
Gross purchase price of undeveloped net acres   $ 94,700        
Gas and oil area, working interest, percent   92.00%        
Amount placed in escrow           $ 8,600
Settlement adjustments   $ 200        
Net purchase price of undeveloped net acres   94,500        
Unproved properties acquired   80,700        
Proved properties   13,800        
Capitalized transaction costs   $ 200        
Reeves County            
Business Acquisition [Line Items]            
Undeveloped net acres acquired | a 8,600          
Number of wells sold (in wells) | Wells 12          
Proceeds from sale $ 140,700          
Non-operated position 32.00%          
Gain (loss) on sale $ 0