Employee Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	[1]	Dec. 31, 2014	[2]	Dec. 31, 2013	[2]
Summary of Employee Benefit Plan Costs
Pension and postretirement costs	$ 28		$ 106		$ 1,013
Defined contribution plan costs	$ 24		$ 93		$ 376

[1] Financial information has been retrospectively adjusted for the acquisition of the McKee Terminal Services Business.

[2] Financial information has been retrospectively adjusted for the acquisitions of the Corpus Christi Terminal Services Business and the McKee Terminal Services Business.