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v3.20.1

Derivatives and Fair Value (Narrative) (Details) $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
May 06, 2019 $ / bbl bbl | Dec. 31, 2019 USD ($) bbl | Jun. 30, 2018 bbl $ / bbl
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Barrels |  | 274,870 |
Benchmark of liability position, with required financial actions | $ |  | $ 10.0 |
Commodity Contract [Member] |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Derivative assets | $ |  | $ 0.6 |
Quantity of barrels |  | 274,870 |
Commodity Contract, June 2018 Through June 2019 [Member] |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Derivative, average price per barrel | $ / bbl |  |  | 74.00
Quantity of barrels |  |  | 400,000
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 |  |

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