Cash Offer Multiple

No definition available.

Name:	mmlp_CashOfferMultiple
Namespace Prefix:	mmlp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Cash Tender Offer Rate

+ References

No definition available.

+ Details

Name:	mmlp_CashTenderOfferRate
Namespace Prefix:	mmlp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Principal Amount Transfer Rate

+ References

No definition available.

+ Details

Name:	mmlp_DebtInstrumentPrincipalAmountTransferRate
Namespace Prefix:	mmlp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Minimal Tender Condition as A Percentage Of Total Principal

+ References

No definition available.

+ Details

Name:	mmlp_MinimalTenderConditionAsAPercentageOfTotalPrincipal
Namespace Prefix:	mmlp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Natural Gas, Storage, Volume

+ References

No definition available.

+ Details

Name:	mmlp_NaturalGasStorageVolume
Namespace Prefix:	mmlp_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage Of Debt Restructured

+ References

No definition available.

+ Details

Name:	mmlp_PercentageOfDebtRestructured
Namespace Prefix:	mmlp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of principal amount of debt redeemed.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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.

+ References

No definition available.

+ Details

Name:	us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228

+ Details

Name:	us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8672-108599

+ Details

Name:	us-gaap_NumberOfOperatingSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=mmlp_SeniorNotes7250Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=mmlp_SeniorSecured1150NotesDue2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=mmlp_SeniorSecured1000NotesDue2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DiscontinuedOperationsDisposedOfBySaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=mmlp_NaturalGasStorageAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Nature of Operations and Basis of Presentation (Details) ft³ in Billions			3 Months Ended	6 Months Ended
	Jul. 23, 2020 USD ($)	Jul. 09, 2020 USD ($)	Mar. 31, 2020 USD ($)	Jun. 30, 2020 USD ($) segment	Jul. 31, 2020	Jun. 25, 2020 USD ($)	Jun. 28, 2019 USD ($) ft³	Apr. 30, 2014 USD ($)	Feb. 28, 2013 USD ($)
Error Corrections and Prior Period Adjustments Restatement
Number of primary business lines \| segment				4
Impairment of long lived assets			$ 4,352,000
2021 Notes \| Senior Notes
Error Corrections and Prior Period Adjustments Restatement
Percentage of debt restructured (percent)						74.00%
Stated interest rate (percent)				7.25%		7.25%
Cash tender offer rate (per $1,000)						$ 650
Face amount				$ 400,000,000				$ 150,000,000	$ 250,000,000
2021 Notes \| Senior Notes \| Subsequent event
Error Corrections and Prior Period Adjustments Restatement
Face amount	$ 335,500,000	$ 335,500,000
Debt instrument percentage of principal amount (in percent)	92.045%	92.045%
Minimal tender condition as a percentage of total principal (percent)	95.00%	95.00%			92.00%
Exchange Notes \| Senior Notes
Error Corrections and Prior Period Adjustments Restatement
Stated interest rate (percent)						11.50%
New Notes \| Senior Notes
Error Corrections and Prior Period Adjustments Restatement
Stated interest rate (percent)						10.00%
Face amount						$ 50,000,000
Principal transfer rate (per $1,000)						$ 1,000
Cash offer multiple (rate)						85.00%
Discontinued Operations, Disposed of by Sale \| Natural Gas Storage Assets
Error Corrections and Prior Period Adjustments Restatement
Natural gas storage (in cubic feet) \| ft³							50
Proceeds from sale of assets							$ 210,067,000