Commitments and Contingencies - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($) MMBTU / d
Commitments And Contingencies Disclosure [Line Items]
Transportation commitments future minimum transportation fees due three months change | $	$ 12.7
Period of transportation commitments future minimum transportation fees due three months change	9 years
Natural Gas | Minimum
Commitments And Contingencies Disclosure [Line Items]
Transportation and gathering commitments contingent upon pipeline construction or modification, term of contract	1 year
Oil and Gas Delivery Commitments and Contracts, Daily Production	1,500
Natural Gas | Maximum
Commitments And Contingencies Disclosure [Line Items]
Transportation and gathering commitments contingent upon pipeline construction or modification, term of contract	5 years
Oil and Gas Delivery Commitments and Contracts, Daily Production	15,000