Commitments and Contingencies - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($)
Commitments And Contingencies Disclosure [Abstract]
Natural gas transportation and treating agreements	through July 2019
Maximum commitments under natural gas transportation and treating agreements	$ 3.8
Contract term related to drilling rigs	through April 2018
Commitments for contracted drilling services	$ 10.8