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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Due from charterers, net [Abstract]      
Reserve against the due from charterers $ 632 $ 488  
Accrual related to estimated customer claims 536 407  
Fixed assets, net [Abstract]      
Depreciation and amortization expense for fixed assets 140,743 139,063 136,203
Deferred drydocking costs [Abstract]      
Amortization expense for drydocking 5,700 5,064 5,617
Minimum [Member]
      
Deferred drydocking costs [Abstract]      
Period for which vessels are required to be drydocked for major repairs and maintenance 30 months    
Maximum [Member]
      
Deferred drydocking costs [Abstract]      
Period for which vessels are required to be drydocked for major repairs and maintenance 60 months    
Property, Plant and Equipment Excluding Vessels [Member]
      
Fixed assets, net [Abstract]      
Depreciation and amortization expense for fixed assets 1,481 888 507
Furniture and Fixtures [Member]
      
Fixed assets, net [Abstract]      
Useful lives 5 years    
Vessel Equipment [Member]
      
Vessels [Line Items]      
Estimated useful life 25 years    
Depreciation expense $ 133,562 $ 133,111 $ 130,080
Estimated scrap value (in dollars per lightweight ton) 245    
Vessel Equipment [Member] | Minimum [Member]
      
Fixed assets, net [Abstract]      
Useful lives 2 years    
Vessel Equipment [Member] | Maximum [Member]
      
Fixed assets, net [Abstract]      
Useful lives 15 years    
Computer Equipment [Member]
      
Fixed assets, net [Abstract]      
Useful lives 3 years