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PARTNERS' EQUITY (Details) - shares
9 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Restricted phantom units    
Information related to public offering    
Vesting (in units) 15,750  
Common units    
Changes in number of units outstanding    
Units outstanding at the beginning of the period 16,124,566  
Units outstanding at the end of the period 16,133,941  
General partner interest    
Changes in number of units outstanding    
Units outstanding at the beginning of the period 329,073  
TransMontaigne GP to maintain its 2% general partner interest 191  
Units outstanding at the end of the period 329,264  
Long-term incentive plan    
Information related to public offering    
Common units held on behalf of TransMontaigne Services Inc.'s long-term incentive plan 750,000  
Long-term incentive plan | Common units    
Changes in number of units outstanding    
Issuance of common units by plan 7,732  
Information related to public offering    
Common units held on behalf of TransMontaigne Services Inc.'s long-term incentive plan 0 8,018
Savings and retention plan | Common units    
Changes in number of units outstanding    
Issuance of common units by plan 1,643