Annual report pursuant to Section 13 and 15(d)

Derivative Instruments and Hedging Activities (Contingent Consideration Arrangements) (Details)

v3.20.4
Derivative Instruments and Hedging Activities (Contingent Consideration Arrangements) (Details)
$ in Thousands
Dec. 31, 2020
USD ($)
$ / bbl
Jan. 31, 2020
USD ($)
Divestiture, Ranger    
Derivative [Line Items]    
Payment to be presented in cash flows from financing activities $ 8,500  
Remaining potential settlements in future years 20,800  
Merger, Contingent ExL Consideration    
Derivative [Line Items]    
Payment to be presented in cash flows from financing activities 19,200  
Contingent payment made   $ 50,000
Remaining potential settlements in future years $ 25,000  
Remaining Potential Settlement    
Derivative [Line Items]    
Threshold | $ / bbl 65  
Remaining Potential Settlement | Divestiture, Ranger    
Derivative [Line Items]    
Contingent Receipt - Annual $ 9,000  
Contingent Receipt - Annual 20,833  
Remaining Contingent Receipt - Aggregate Limit $ 20,833  
Remaining Potential Settlement | Merger, Contingent ExL Consideration    
Derivative [Line Items]    
Threshold | $ / bbl 50.00  
Contingent Payment - Annual $ (25,000)  
Remaining Contingent Payments - Aggregate Limit $ (25,000)  
Remaining Potential Settlement | Minimum    
Derivative [Line Items]    
Threshold | $ / bbl 60  
Remaining Potential Settlement | Maximum    
Derivative [Line Items]    
Threshold | $ / bbl 65