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Derivatives and Fair Value (Narrative) (Details) |  |  |  |  |  | 2 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 24, 2021 $ / bbl bbl | Aug. 06, 2021 $ / bbl bbl | May 06, 2021 $ / bbl bbl | Jan. 22, 2021 $ / bbl bbl | May 06, 2019 $ / bbl bbl | Mar. 09, 2022 $ / bbl bbl | Dec. 31, 2021 $ / bbl bbl | Jun. 30, 2018 bbl $ / bbl
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |  |
Barrels |  |  |  |  |  |  | 711,854 |
Commodity Contract, June 2018 Through June 2019 [Member] |  |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |  |
Derivative, average price per barrel | $ / bbl |  |  |  |  |  |  |  | 74.00
Derivative, nonmonetary notional amount |  |  |  |  |  |  |  | 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 |  |  |
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 |  |  |  |  |
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 |  |  |  |  |  |
Commodity Contract - March 2022 To June 2022 [Member] |  |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |  |
Derivative, average price per barrel | $ / bbl | 72.00 |  |  |  |  |  | 72.00 |
Barrels | 460,000 |  |  |  |  |  | 460,000 |
Subsequent Event [Member] |  |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |  |
Barrels |  |  |  |  |  | 609,000 |  |
Subsequent Event [Member] | Commodity Contract - April 2022 To June 2022 [Member] |  |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |  |
Derivative, average price per barrel | $ / bbl |  |  |  |  |  | 85.01 |  |
Barrels |  |  |  |  |  | 234,000 |  |
Subsequent Event [Member] | Commodity Contract - July 2022 To September 2022 [Member] |  |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |  |
Derivative, average price per barrel | $ / bbl |  |  |  |  |  | 76.53 |  |
Barrels |  |  |  |  |  | 375,000 |  |

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