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Related Party Transactions (Other Related Party Transactions) (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Sep. 29, 2014
Aug. 31, 2014
Aug. 29, 2014
May. 12, 2014
Mar. 31, 2014
Mar. 31, 2013
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Related Party Transaction [Line Items]                      
General partner interest percentage 2.00%   2.00% 2.00% 2.00%       2.00%    
Note receivable             $ 15,000   $ 15,000   $ 15,000
Martin Energy Trading LLC                      
Related Party Transaction [Line Items]                      
Ownership percentage           100.00%          
Proceeds from sale of equity method investment           $ 15,000          
Annual interest rate percentage of note receivable   15.00%                  
Notes Receivable | Martin Energy Trading LLC                      
Related Party Transaction [Line Items]                      
Note receivable   $ 15,000                  
Interest Expense | Martin Energy Trading LLC                      
Related Party Transaction [Line Items]                      
Interest income             $ 567 $ 185 $ 1,683 $ 185  
Martin Resource Management                      
Related Party Transaction [Line Items]                      
Number of shares owned (in units)             6,264,532   6,264,532    
Ownership percentage             17.70%   17.70%    
General partner interest percentage                 2.00%    
Martin Resource Management | MMGP Holdings, LLC                      
Related Party Transaction [Line Items]                      
General partner interest percentage                 51.00%