Quarterly report pursuant to Section 13 or 15(d)

Derivatives and Fair Value (Narrative) (Details)

v3.19.3
Derivatives and Fair Value (Narrative) (Details)
$ in Millions
1 Months Ended 9 Months Ended
May 06, 2019
$ / bbl
bbl
Jun. 30, 2018
$ / bbl
bbl
Sep. 30, 2019
USD ($)
$ / bbl
bbl
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Barrels     394,735
Commodity Contract, June 2018 Through June 2019 [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative, average price per barrel | $ / bbl   74.00 66.70
Barrels   400,000 119,865
Derivative assets | $     $ 3.7
Commodity Contract, July 19 Through June 2020 [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative, average price per barrel | $ / bbl 66.70   66.70
Barrels 500,000   274,870
Benchmark of liability position, with required financial actions | $     $ 10.0