Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.1
Derivative Instruments and Hedging Activities (Contingent Consideration Arrangement) (Details)
$ in Thousands
Mar. 31, 2020
USD ($)
$ / bbl
Jan. 31, 2020
USD ($)
Actual Settlement 2019    
Derivative [Line Items]    
Threshold | $ / bbl 65  
Remaining Potential Settlements 2020-2021    
Derivative [Line Items]    
Threshold | $ / bbl 65  
Divestiture, Ranger    
Derivative [Line Items]    
Divestiture Date Fair Value $ 8,512  
Payment to be presented in cash flows 8,500  
Remaining potential settlements, receipts in future years 41,700  
Divestiture, Ranger | Actual Settlement 2019    
Derivative [Line Items]    
Contingent Receipt - Annual 0  
Contingent Receipt - Annual 0  
Divestiture, Ranger | Remaining Potential Settlements 2020-2021    
Derivative [Line Items]    
Contingent Receipt - Annual 9,000  
Contingent Receipt - Annual 20,833  
Remaining Contingent Receipt - Aggregate Limit 41,666  
Merger, Contingent ExL Consideration    
Derivative [Line Items]    
Payment to be presented in cash flows 19,200  
Acquisition Date Fair Value $ (69,171)  
Contingent payment made   $ 50,000
Remaining potential settlements, payments in future years   $ 25,000
Merger, Contingent ExL Consideration | Actual Settlement 2019    
Derivative [Line Items]    
Threshold | $ / bbl 50.00  
Contingent Payment - Annual $ (50,000)  
Merger, Contingent ExL Consideration | Remaining Potential Settlements 2020-2021    
Derivative [Line Items]    
Threshold | $ / bbl 50.00  
Contingent Payment - Annual $ (25,000)  
Remaining Contingent Payments - Aggregate Limit $ (25,000)