Revenues - Performance Obligation Payment Terms (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disaggregation of Revenue [Line Items]    
Accrued oil and gas sales receivable, net $ 41,670 $ 76,578
Natural Gas and NGL sales | Minimum    
Disaggregation of Revenue [Line Items]    
Performance obligations billing cycle 30 days  
Natural Gas and NGL sales | Maximum    
Disaggregation of Revenue [Line Items]    
Performance obligations billing cycle 90 days  
Oil sales    
Disaggregation of Revenue [Line Items]    
Performance obligations billing cycle 30 days