Annual report pursuant to Section 13 and 15(d)

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

v3.19.3.a.u2
Derivative Instruments and Hedging Activities (Contingent Consideration Arrangement) (Details)
$ in Thousands
Jan. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
$ / bbl
Divestiture, Ranger    
Derivative [Line Items]    
Divestiture Date Fair Value   $ 8,512
Payment to be presented in cash flows from financing activities   8,500
Remaining potential settlements in future years   41,500
Merger, Contingent ExL Consideration    
Derivative [Line Items]    
Acquisition Date Fair Value   $ (69,171)
Merger, Contingent ExL Consideration | Subsequent Event    
Derivative [Line Items]    
Contingent payment made $ 50,000  
Remaining potential settlements in future years $ 25,000  
Pending Settlement 2019    
Derivative [Line Items]    
Threshold | $ / bbl   65
Pending Settlement 2019 | Divestiture, Ranger    
Derivative [Line Items]    
Contingent Receipt - Annual   $ 0
Contingent Receipt - Annual   $ 0
Pending Settlement 2019 | Merger, Contingent ExL Consideration    
Derivative [Line Items]    
Threshold | $ / bbl   50.00
Contingent Payment - Annual   $ (50,000)
Pending Settlement 2019 | Minimum    
Derivative [Line Items]    
Threshold | $ / bbl   60
Pending Settlement 2019 | Maximum    
Derivative [Line Items]    
Threshold | $ / bbl   65
Remaining Potential Settlements 2020-2021    
Derivative [Line Items]    
Threshold | $ / bbl   65
Remaining Potential Settlements 2020-2021 | Divestiture, Ranger    
Derivative [Line Items]    
Contingent Receipt - Annual   $ 9,000
Contingent Receipt - Annual   20,833
Remaining Contingent Receipt - Aggregate Limit   $ 60,000
Remaining Potential Settlements 2020-2021 | Merger, Contingent ExL Consideration    
Derivative [Line Items]    
Threshold | $ / bbl   50.00
Contingent Payment - Annual   $ (50,000)
Remaining Contingent Payments - Aggregate Limit   $ (75,000)
Remaining Potential Settlements 2020-2021 | Minimum    
Derivative [Line Items]    
Threshold | $ / bbl   60
Remaining Potential Settlements 2020-2021 | Maximum    
Derivative [Line Items]    
Threshold | $ / bbl   65