Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities (Narrative) (Details)

v3.20.2
Derivative Instruments and Hedging Activities (Narrative) (Details) - Acquired Contingent Consideration
Jun. 30, 2020
$ / bbl
$ / MMBTU
Jan. 31, 2020
USD ($)
Derivative [Line Items]    
Contingent payment received | $   $ 10,000,000.0
Aggregate settlements limit | $   $ 13,000,000.0
Minimum    
Derivative [Line Items]    
Threshold | $ / bbl 53.00  
Weighted average price (in dollars per share) | $ / MMBTU 3.18  
Maximum    
Derivative [Line Items]    
Threshold | $ / bbl 60.00  
Weighted average price (in dollars per share) | $ / MMBTU 3.30