Commitments (Tables)

6 Months Ended

Jun. 30, 2017

Commitments [Abstract]

Summary of firm transportation volumes and related demand charges

Period	Dekatherms per day		Demand Charges
Jul 2017 - Apr 2018		5,530		$0.20 - $0.65
May 2018 - May 2020		3,230		$0.20 - $0.62
Apr 2020 – May 2020		2,150	$	0.20
Jun 2020 – May 2036		1,000	$	0.20