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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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