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Document and Entity Information
 6 Months Ended
Jun. 30, 2014
Jul. 18, 2014
Document and Entity Information [Abstract]    
Entity Registrant Name MARINE PRODUCTS CORP  
Entity Central Index Key 0001129155  
Trading Symbol mpx  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   38,165,676
Document Type 10-Q  
Document Period End Date Jun. 30, 2014  
Amendment Flag false  
Document Fiscal Year Focus 2014  
Document Fiscal Period Focus Q2