Derivative Instruments - Additional Information (Detail) $ in Thousands	1 Months Ended	8 Months Ended	9 Months Ended
	Sep. 30, 2016 USD ($) Entity $ / bbl	Sep. 12, 2016 USD ($)	Sep. 30, 2016 USD ($) Entity $ / bbl	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative assets	$ 446		$ 446		$ 97,956
Derivatives Settled to Pay Down Revolver	$ 0	$ 51,979		$ 0
Crude Oil
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative, Swap Type, Average Fixed Price | $ / bbl	48.62		48.62
Commodity contracts
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative assets	$ 14,700		$ 14,700
Number of derivative counterparties | Entity	3		3
Commodity contracts | Natural Gas
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Third-party quoted forward prices			NYMEX Henry Hub gas
Commodity contracts | Crude Oil
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Third-party quoted forward prices			West Texas Intermediate crude oil
April 2016 [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivatives Settled			$ 22,600
Derivatives Settled to Pay Down Revolver			16,600
May 2016 [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivatives Settled			17,500
Derivatives Settled to Pay Down Revolver			12,500
March 2016 [Domain]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivatives Settled			$ 22,900