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(Schedule of Assets and Liabilities Assumed) (Details) (USD $)
In Thousands, unless otherwise specified
Aug. 29, 2014
May 31, 2014
Cardinal Gas Storage Partners LLC [Member]    
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]    
Restricted cash $ 17,566mmlp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRestrictedCash
/ us-gaap_BusinessAcquisitionAxis
= mmlp_CardinalGasStoragePartnersLlcMember
 
Other current assets 9,385us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther
/ us-gaap_BusinessAcquisitionAxis
= mmlp_CardinalGasStoragePartnersLlcMember
 
Property, plant and equipment 390,895us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= mmlp_CardinalGasStoragePartnersLlcMember
 
Intangible and other assets 80,135us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= mmlp_CardinalGasStoragePartnersLlcMember
 
Project level finance debt (282,087)mmlp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentLiabilitiesProjectLevelFinanceDebt
/ us-gaap_BusinessAcquisitionAxis
= mmlp_CardinalGasStoragePartnersLlcMember
 
Other current liabilities (6,713)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther
/ us-gaap_BusinessAcquisitionAxis
= mmlp_CardinalGasStoragePartnersLlcMember
 
Other non-current liabilities (595)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther
/ us-gaap_BusinessAcquisitionAxis
= mmlp_CardinalGasStoragePartnersLlcMember
 
Total 208,586us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= mmlp_CardinalGasStoragePartnersLlcMember
 
Martin Resource Management [Member]    
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]    
Property, plant and equipment   2,453us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= mmlp_MartinResourceManagementMember
Current liabilities   (13)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities
/ us-gaap_BusinessAcquisitionAxis
= mmlp_MartinResourceManagementMember
Total   $ 2,440us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= mmlp_MartinResourceManagementMember