Derivative Financial Instruments - Changes in Fair Value and Settlements of Commodity Derivative Contracts (Details) $ in Thousands |
3 Months Ended |
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Mar. 31, 2019
USD ($)
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| Gain Loss On Derivative Instruments Net Pretax [Abstract] | |
| Derivative loss | $ 48,886 |
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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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