Derivative Instruments - Summary of Derivative Instrument Positions for Future Production Periods (Detail)	6 Months Ended
	Jun. 30, 2016 MMBTU $ / MMBTU $ / gal bbl gal
Natural Gas Derivatives Production Period July 2016 – December 2016 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (MMBtu/d) | MMBTU	65,000
Weighted Average Price ($/MMBtu)	3.28
Natural Gas Derivatives Production Period January 2017 – December 2017 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (MMBtu/d) | MMBTU	10,000
Weighted Average Price ($/MMBtu)	2.98
Oil Derivatives Production Period July 2016 - December 2016 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Weighted Average Price ($/MMBtu)	45.55
Volume (Bbls/d) | bbl	850
NGL Derivatives Production Period July 2016 – December 2016 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (Gal/d) | gal	42,000
Weighted Average Price ($/Gal) | $ / gal	0.46
Production Period July 2016 – September 2016 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (Gal/d) | gal	10,500
Weighted Average Price ($/Gal) | $ / gal	0.46
Put Option [Member] | Natural Gas Derivatives Production Period July 2016 – December 2016 [Member] | Put Purchased [Member] | Floor [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (MMBtu/d) | MMBTU	40,000
Weighted Average Price ($/MMBtu)	2.90
Put Option [Member] | Natural Gas Derivatives Production Period July 2016 – December 2016 [Member] | Put Sold [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (MMBtu/d) | MMBTU	16,800
Weighted Average Price ($/MMBtu)	2.75
Put Option [Member] | Natural Gas Derivatives Production Period July 2016 – December 2016 [Member] | Put Sold [Member] | Floor [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (MMBtu/d) | MMBTU	40,000
Weighted Average Price ($/MMBtu)	2.35
Put Option [Member] | Natural Gas Derivatives Production Period January 2017 – December 2017 [Member] | Put Purchased [Member] | Floor [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (MMBtu/d) | MMBTU	50,000
Weighted Average Price ($/MMBtu)	3.00
Put Option [Member] | Natural Gas Derivatives Production Period January 2017 – December 2017 [Member] | Put Purchased [Member] | Floor One [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (MMBtu/d) | MMBTU	20,000
Weighted Average Price ($/MMBtu)	2.75
Put Option [Member] | Natural Gas Derivatives Production Period January 2017 – December 2017 [Member] | Put Purchased [Member] | Floor Two [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (MMBtu/d) | MMBTU	30,000
Weighted Average Price ($/MMBtu)	2.50
Put Option [Member] | Natural Gas Derivatives Production Period January 2017 – December 2017 [Member] | Put Purchased [Member] | Floor Three [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (MMBtu/d) | MMBTU	30,000
Weighted Average Price ($/MMBtu)	2.75
Put Option [Member] | Natural Gas Derivatives Production Period January 2017 – December 2017 [Member] | Put Sold [Member] | Floor [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (MMBtu/d) | MMBTU	30,000
Weighted Average Price ($/MMBtu)	2.25
Put Option [Member] | Natural Gas Derivatives Production Period July 2016 – December 2017 [Member] | Put Purchased [Member] | Floor [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (MMBtu/d) | MMBTU	30,000
Weighted Average Price ($/MMBtu)	3.00
Put Option [Member] | Oil Derivatives Production Period July 2016 - December 2016 [Member] | Put Purchased [Member] | Floor [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Weighted Average Price ($/MMBtu)	60.00
Volume (Bbls/d) | bbl	1,000
Put Option [Member] | Oil Derivatives Production Period July 2016 - December 2016 [Member] | Put Sold [Member] | Floor [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Weighted Average Price ($/MMBtu)	45.00
Volume (Bbls/d) | bbl	1,000
Put Option [Member] | Oil Derivatives Production Period January 2017 - September 2017 [Member] | Put Purchased [Member] | Floor [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Weighted Average Price ($/MMBtu)	46.00
Volume (Bbls/d) | bbl	2,000
Put Option [Member] | Oil Derivatives Production Period January 2017 - September 2017 [Member] | Put Sold [Member] | Floor [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Weighted Average Price ($/MMBtu)	38.00
Volume (Bbls/d) | bbl	2,000
Put Option [Member] | Oil Derivatives Production Period January 2017 - December 2017 [Member] | Put Purchased [Member] | Floor [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Weighted Average Price ($/MMBtu)	46.00
Volume (Bbls/d) | bbl	2,000
Put Option [Member] | Oil Derivatives Production Period January 2017 - December 2017 [Member] | Put Sold [Member] | Floor [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Weighted Average Price ($/MMBtu)	38.00
Volume (Bbls/d) | bbl	2,000
Call Option [Member] | Natural Gas Derivatives Production Period July 2016 – December 2016 [Member] | Put Sold [Member] | Ceiling One [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (MMBtu/d) | MMBTU	40,000
Weighted Average Price ($/MMBtu)	3.24
Call Option [Member] | Natural Gas Derivatives Production Period January 2017 – December 2017 [Member] | Put Sold [Member] | Ceiling One [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (MMBtu/d) | MMBTU	50,000
Weighted Average Price ($/MMBtu)	3.20
Call Option [Member] | Natural Gas Derivatives Production Period January 2017 – December 2017 [Member] | Put Sold [Member] | Ceiling Two [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (MMBtu/d) | MMBTU	20,000
Weighted Average Price ($/MMBtu)	3.29
Call Option [Member] | Natural Gas Derivatives Production Period January 2017 – December 2017 [Member] | Put Sold [Member] | Ceiling Three [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (MMBtu/d) | MMBTU	30,000
Weighted Average Price ($/MMBtu)	3.03
Call Option [Member] | Natural Gas Derivatives Production Period January 2017 – December 2017 [Member] | Put Sold [Member] | Ceiling Four [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (MMBtu/d) | MMBTU	30,000
Weighted Average Price ($/MMBtu)	3.57
Call Option [Member] | Natural Gas Derivatives Production Period July 2016 – December 2017 [Member] | Put Sold [Member] | Ceiling [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (MMBtu/d) | MMBTU	30,000
Weighted Average Price ($/MMBtu)	3.50
Call Option [Member] | Natural Gas Derivatives Production Period January 2018 - December 2018 [Member] | Put Sold [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Volume (MMBtu/d) | MMBTU	40,000
Weighted Average Price ($/MMBtu)	3.75
Call Option [Member] | Oil Derivatives Production Period July 2016 - December 2016 [Member] | Put Sold [Member] | Ceiling [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Weighted Average Price ($/MMBtu)	70.10
Volume (Bbls/d) | bbl	1,000
Call Option [Member] | Oil Derivatives Production Period January 2017 - September 2017 [Member] | Put Sold [Member] | Ceiling [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Weighted Average Price ($/MMBtu)	59.50
Volume (Bbls/d) | bbl	2,000
Call Option [Member] | Oil Derivatives Production Period January 2018 - December 2018 [Member] | Put Sold [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Weighted Average Price ($/MMBtu)	50.00
Volume (Bbls/d) | bbl	1,000
Call Option [Member] | Oil Derivatives Production Period January 2017 - December 2017 [Member] | Put Sold [Member] | Ceiling [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Weighted Average Price ($/MMBtu)	60.00
Volume (Bbls/d) | bbl	2,000