Quarterly report pursuant to Section 13 or 15(d)

Derivatives and Fair Value (Narrative) (Details)

v3.21.1
Derivatives and Fair Value (Narrative) (Details)
 3 Months Ended
May 06, 2021
$ / bbl
bbl
Jan. 22, 2021
$ / bbl
bbl
May 06, 2019
$ / bbl
bbl
Mar. 31, 2021
bbl
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Barrels       550,523
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    
Subsequent Event [Member] | 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