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Financial Instruments and Risk Management - Narrative (Details) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 USD ($) barrels_per_day contract $ / bbl | Dec. 31, 2018 USD ($) contract | Dec. 31, 2017 USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Number of foreign currency derivatives | contract | 0 |  |
Amount of loss reclassified to interest expense | $ 6.3 |  |
Loss deferred for fair value of interest rate derivative contracts, net of tax |  | $ 0.8 |
Income taxes on deferred loss on fair value of interest rate derivative contracts | $ 2.9 |  |
Amount of loss expected to be reclassified to interest expense in the next 12 months |  | $ 3.0 | $ 3.0
Commodity derivative contracts |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Daily production commitment (barrels per day) | barrels_per_day | 45,000 |  |
Derivative, Swap Type, Average Fixed Price | $ / bbl | 56.42 |  |
Number of WTI crude oil swap financial contracts | contract |  | 0 |

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