Partners' Capital (Deficit) - Issuance of Common Units (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Feb. 22, 2017	Dec. 31, 2019	Dec. 31, 2018	[1]	Dec. 31, 2017	[1]
Limited Partners' Capital Account [Line Items]
Units issued in public offering (in shares)	2,990,000
Share price (in dollars per share)	$ 18.00
Proceeds from issuance of common units	$ 51,056
General partner contribution to maintain GP interest	$ 1,098	$ 0	$ 0		$ 1,098
MMGP
Limited Partners' Capital Account [Line Items]
General partner interest percentage		2.00%
MMGP | Martin Resource Management
Limited Partners' Capital Account [Line Items]
General partner interest percentage		2.00%

[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.