Derivative Instruments and Hedging Activities (Schedule of Gain or Loss on Derivative Contracts) (Details) - USD ($) $ in Thousands |
3 Months Ended | |
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Mar. 31, 2018 |
Mar. 31, 2017 |
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Derivative Instruments, Gain (Loss) [Line Items] | ||
Net gain on fair value adjustments | $ 3,978 | $ 17,794 |
Total gain (loss) on oil derivatives | (4,481) | 15,303 |
Not Designated as Hedging Instrument | ||
Derivative Instruments, Gain (Loss) [Line Items] | ||
Total gain (loss) on oil derivatives | (4,481) | 15,303 |
Not Designated as Hedging Instrument | Oil | ||
Derivative Instruments, Gain (Loss) [Line Items] | ||
Net loss on settlements | (8,916) | (2,524) |
Net gain on fair value adjustments | 4,067 | 17,266 |
Total gain (loss) on oil derivatives | (4,849) | 14,742 |
Not Designated as Hedging Instrument | Natural gas | ||
Derivative Instruments, Gain (Loss) [Line Items] | ||
Net loss on settlements | 457 | 33 |
Net gain on fair value adjustments | (89) | 528 |
Total gain (loss) on oil derivatives | $ 368 | $ 561 |
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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