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Derivatives And Fair Value (Narrative) (Detail) | 1 Months Ended | 9 Months Ended
--- | --- | ---
Apr. 30, 2016 $ / Boe | Sep. 30, 2016 bbl
Derivative, Nonmonetary Notional Amount per Month | bbl |  | 36,000
Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] |  |
Underlying, Derivative Energy Measure | $ / Boe | 40.00 |

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X
- Definition Specified interest rate, security price, commodity price, foreign exchange rate, index of prices or rates for a derivative contract measured in energy volume but not the derivative contract itself. + References No definition available. + Details
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- Details
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X
- Details
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