Goodwill (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Line Items]
Carrying amount of goodwill	$ 17,705	$ 17,785	[1]
Terminalling and storage
Goodwill [Line Items]
Carrying amount of goodwill	11,867	11,868
Natural gas liquids
Goodwill [Line Items]
Carrying amount of goodwill	0	79
Sulfur services
Goodwill [Line Items]
Carrying amount of goodwill	5,349	5,349
Transportation revenue
Goodwill [Line Items]
Carrying amount of goodwill	$ 489	$ 489

[1] Financial information has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 2 – Significant Accounting Policies and Practices.