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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 0 Months Ended 12 Months Ended
Jan. 02, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Due from charterers, net        
Reserve against the due from charters   $ 488 $ 906  
Accrual related to estimated customer claims   407 762  
Vessels, net        
Estimated useful life   25 years    
Depreciation expense   133,111 130,080 109,839
Estimated scrap value (in dollars per lightweight ton) 175.00 245.00    
Period considered for determination of estimated scrap value   15 years    
Basic and diluted net (loss) income per share, if there had been no change in estimated scrap value   $ (3.53) $ 0.65  
Fixed assets, net        
Depreciation and amortization expense   139,063 136,203 115,663
Deferred drydocking costs        
Amortization expense for drydocking   5,064 5,617 5,324
Minimum
        
Deferred drydocking costs        
Period for which vessels are required to be drydocked for major repairs and maintenance   30 months    
Maximum
        
Deferred drydocking costs        
Period for which vessels are required to be drydocked for major repairs and maintenance   60 months    
Property, plant, and equipment excluding vessels
        
Fixed assets, net        
Depreciation and amortization expense   888 507 501
Furniture, fixtures & other equipment
        
Fixed assets, net        
Useful lives   5 years    
Vessel equipment | Minimum
        
Fixed assets, net        
Useful lives   2 years    
Vessel equipment | Maximum
        
Fixed assets, net        
Useful lives   15 years    
Computer equipment
        
Fixed assets, net        
Useful lives   3 years    
Residual scrap value of vessels | Adjustment
        
Fixed assets, net        
Change to the basis and diluted net (loss) income per share (in dollars per share)   $ 0.06 $ 0.07  
Depreciation and amortization expense   $ 2,476 $ 2,479