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v3.19.2

Financial Instruments and Risk Management (Narrative) (Details) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 USD ($) OffsettingPosition contract | Mar. 31, 2018 USD ($) contract | Dec. 31, 2019 USD ($) | Jun. 30, 2019 USD ($) bbl / d OffsettingPosition contract | Jun. 30, 2018 barrels_per_day | Dec. 31, 2018 item
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |
Number of foreign currency derivatives | contract | 0 | 0 |  | 0 |  |
Amount of loss reclassified to interest expense | $ 1,500,000 | $ 700,000 |  |  |  |
Number of Offsetting Positions (in positions) | 0 |  |  | 0 |  | 0
Scenario, Forecast |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |
Derivative loss |  |  | $ 1,500,000 |  |  |
Commodity derivative contracts |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |
Daily production commitment (barrels per day) |  |  |  | 20,000 | 21,000 |
Interest Rate Swap |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |
Loss deferred for fair value of interest rate derivative contracts, net of tax | $ 6,700,000 |  |  | $ 6,700,000 |  |
Income taxes on deferred loss on fair value of interest rate derivative contracts | $ 1,800,000 |  |  | $ 1,800,000 |  |
Notes Due 2022 |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |
Debt instrument term |  |  |  | 10 years |  |

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