Partners' Capital - Incentive Distribution Rights and Distributions of Available Cash (Details) - USD ($)	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Limited Partners' Capital Account [Line Items]
General partner interest percentage	2.00%
Incentive distribution	$ 0	$ 0
Distribution period	45 days
Martin Midstream GP LLC
Limited Partners' Capital Account [Line Items]
General partner interest percentage	2.00%
Incentive distribution	$ 0	$ 0
Martin Midstream GP LLC \| Target Level 1
Limited Partners' Capital Account [Line Items]
Target cash distribution, percent	2.00%
Target cash distribution (USD per share)	$ 0.55
Martin Midstream GP LLC \| Target Level 2
Limited Partners' Capital Account [Line Items]
Target cash distribution, percent	15.00%
Target cash distribution (USD per share)	$ 0.625
Martin Midstream GP LLC \| Target Level 3
Limited Partners' Capital Account [Line Items]
Target cash distribution, percent	25.00%
Target cash distribution (USD per share)	$ 0.75
Martin Midstream GP LLC \| Target Level 4
Limited Partners' Capital Account [Line Items]
Target cash distribution, percent	50.00%
Minimum \| Martin Midstream GP LLC \| Target Level 1
Limited Partners' Capital Account [Line Items]
Target cash distribution (USD per share)	$ 0.50
Maximum \| Martin Midstream GP LLC \| Target Level 1
Limited Partners' Capital Account [Line Items]
Target cash distribution (USD per share)	$ 0.55

Cash Distribution, Target, Per Share

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- Definition

Cash Distribution, Target, Percent

+ References

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- Definition

Limited Partners' Capital Account, Distribution Period

+ References

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- Definition

Amount of incentive obligation paid in cash or stock during the period to a limited liability corporation managing member or limited partnership general partner.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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- Definition

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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