v3.10.0.1
Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2018
Feb. 19, 2019
Jun. 30, 2018
Document and Entity Information [Abstract]      
Entity Registrant Name MARTIN MIDSTREAM PARTNERS LP    
Entity Central Index Key 0001176334    
Current Fiscal Year End Date --12-31    
Entity Filer Category Accelerated Filer    
Entity Emerging Growth Company false    
Entity Small Business false    
Document Type 10-K    
Document Period End Date Dec. 31, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Common Stock, Shares Outstanding (in shares)   39,049,181  
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 454,540,329
Entity Shell Company false