Derivative Instruments - Additional Information (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($) Entity $ / bbl	Jun. 30, 2015 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivatives Settled to Pay Down Revolver	$ 51,979	$ 0
Crude Oil
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative, Swap Type, Average Fixed Price | $ / bbl	48.62
Commodity contracts
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative assets	$ 18,200
Number of derivative counterparties | Entity	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