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, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items] | |||
| Acquisition | $ 124,558 | $ 1,951,281 | $ 152,887 |
| Development | 603,676 | 994,237 | 423,998 |
| Exploratory | 21,840 | 0 | 0 |
| Recompletions | 7,915 | 14,289 | 16,386 |
| Capitalized asset retirement obligation | 1,452 | 42,270 | 10,971 |
| Total | 759,441 | 3,002,077 | 604,242 |
| Investment in Grizzly Oil Sands ULC | |||
| Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items] | |||
| Acquisition | 238 | 503 | 357 |
| Development | 0 | 0 | 0 |
| Exploratory | 0 | 0 | 0 |
| Capitalized asset retirement obligation | (285) | (524) | 784 |
| Total | $ (47) | $ (21) | $ 1,141 |
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- Definition Costs Incurred, Asset Retirement Obligation Incurred Increase (Decrease) No definition available.
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- Definition Costs incurred for the recompletion of oil and gas wells No definition available.
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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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