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Derivative Financial Instruments and Hedging Activities - Additional Information (Detail) MBbls in Thousands, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 USD ($) MMBTU $ / MMBTU | Dec. 31, 2015 USD ($) MMBTU $ / MMBTU | Dec. 31, 2014 USD ($) $ / bbl MBbls | Feb. 24, 2017 MMBTU $ / MMBTU
Derivative Instruments And Hedging Activities [Line Items] |  |  |  |
Gain on derivative financial instruments |  | $ 2,700 |  |
Loss on derivative financial instruments | $ 5,400 |  | $ 8,200 |
Cash settlements of derivative financial instruments | 2,120 | 1,230 | $ 9,145 |
Derivative asset at fair value |  | 1,400 |  |
Derivative asset at carrying value |  | 1,400 |  |
Derivative asset current at carrying value |  | $ 1,446 |  |
Derivative liability at fair value | 6,000 |  |  |
Derivative liability at carrying value | 6,000 |  |  |
Derivative liability current at carrying value | $ 6,030 |  |  |
Contract terms 2014 oil production |  |  |  |
Derivative Instruments And Hedging Activities [Line Items] |  |  |  |
Quantity of Crude Oil for Which Swap Entered | MBbls |  |  | 2,438 |
NYMEX price of crude oil swaps | $ / bbl |  |  | 96.56 |
Contract terms 2015 natural gas production |  |  |  |
Derivative Instruments And Hedging Activities [Line Items] |  |  |  |
NYMEX price of natural gas swaps | $ / MMBTU | 3.20 | 3.20 |  |
Quantity of natural gas for which swap entered | MMBTU | 1,800,000 | 1,800,000 |  |
Natural Gas Swap Agreements |  |  |  |
Derivative Instruments And Hedging Activities [Line Items] |  |  |  |
Commodity derivatives natural gas volumes hedged | MMBTU | 23,400,000 | 1,800,000 |  |
Average Fixed NYMEX price | $ / MMBTU | 3.37 | 3.20 |  |
Natural Gas Swap Agreements | Scenario Forecast |  |  |  |
Derivative Instruments And Hedging Activities [Line Items] |  |  |  |
Commodity derivatives natural gas volumes hedged | MMBTU |  |  |  | 25,875,000
Average Fixed NYMEX price | $ / MMBTU |  |  |  | 3.38

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