Commitments and Contingencies - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) MMBTU	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Loss Contingencies [Line Items]
Non-cancelable fixed cost agreement, 2017	$ 2,381
Non-cancelable fixed cost agreement, 2018	2,304
Non-cancelable fixed cost agreement, 2019	2,270
Non-cancelable fixed cost agreement, 2020	1,647
Non-cancelable fixed cost agreement, 2021	680
Rent expense	800	$ 800	$ 400
Non-cancelable Agreement [Member]
Loss Contingencies [Line Items]
Non-cancelable fixed cost agreement, 2017	1,600
Non-cancelable fixed cost agreement, 2018	1,600
Non-cancelable fixed cost agreement, 2019	1,600
Non-cancelable fixed cost agreement, 2020	1,600
Non-cancelable fixed cost agreement, 2021	$ 1,600
Holding pipeline capacity | MMBTU	10,000