Quarterly report pursuant to Section 13 or 15(d)

Derivatives and Fair Value (Narrative) (Details)

v3.21.2
Derivatives and Fair Value (Narrative) (Details)
 6 Months Ended
Aug. 06, 2021
$ / bbl
bbl
May 06, 2021
$ / bbl
bbl
Jan. 22, 2021
$ / bbl
bbl
May 06, 2019
$ / bbl
bbl
Jun. 30, 2021
bbl
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Barrels         729,123
Commodity Contract, July 19 Through June 2020 [Member]          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Derivative, average price per barrel | $ / bbl       66.70  
Barrels       500,000  
Commodity Contract, February 2021 Through January 2022 [Member]          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Derivative, average price per barrel | $ / bbl     53.10    
Barrels     709,262    
Commodity Contract, May 2021 Through October 2021 [Member]          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Derivative, average price per barrel | $ / bbl   66.51      
Barrels   672,533      
Subsequent Event [Member] | Commodity Contract, November 2021 Through February 2022 [Member]          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Derivative, average price per barrel | $ / bbl 67.70        
Barrels 314,420