Supplemental Information on Oil and Gas Exploration and Production Activities (Unaudited) - Costs Incurred In Oil and Gas Property Acquisition and Development Activities (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items] | |||
| Acquisition | $ 37,598 | $ 119,444 | $ 1,946,416 |
| Development | 594,673 | 714,269 | 1,138,951 |
| Exploratory | 9,762 | 22,081 | 9,058 |
| Total | 642,033 | 855,794 | 3,094,425 |
| Investment in Grizzly Oil Sands ULC | |||
| Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items] | |||
| Acquisition | 0 | 238 | 503 |
| Development | 0 | 0 | 0 |
| Exploratory | 849 | 0 | 0 |
| Total | $ 849 | $ 238 | $ 503 |
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- Definition Total costs incurred in oil and gas properties acquisition and development activities No definition available.
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- Definition Cost incurred, including capitalized costs and costs charged to expense, in acquisition of oil and gas properties. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Development costs incurred, including capitalized costs and costs charged to expense, in oil and gas activities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Exploration costs incurred, including capitalized costs and costs charged to expense, in oil and gas activities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Details
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