Acquisitions - Narrative (Details) $ in Thousands			12 Months Ended
	Jan. 02, 2019 USD ($) terminal	Feb. 22, 2017 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)		Dec. 31, 2017 USD ($)	[1]
Business Acquisition [Line Items]
Excess purchase price over carrying value of acquired assets			$ 102,393	$ 26	[1]	$ 7,887
Martin Transport Inc. Stock Purchase Agreement
Business Acquisition [Line Items]
Number of terminals | terminal	23
Purchase price	$ 135,000
MEH South Texas Terminals LLC
Business Acquisition [Line Items]
Excess purchase price over carrying value of acquired assets	$ 102,393	$ 7,913
Deferred purchase price				$ 26
Percentage of voting interests acquired		100.00%
Purchase price		$ 27,420
Initial excess purchase price over carrying value of acquired assets		$ 7,887
Excess purchase price over carrying value of acquired assets, percentage		3.00%

[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.