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DEBT (Details 4) - Scenario, Unspecified [Domain] - Revolving credit facility - 2015 Revolving Credit Facility - Vessels Name [Domain] - Subsequent Event Type [Domain]
$ in Thousands
 6 Months Ended
Jul. 10, 2015
USD ($)
Apr. 08, 2015
USD ($)
Apr. 07, 2015
USD ($)
installment
item
Jun. 30, 2015
USD ($)
Dec. 31, 2014
USD ($)
Line of Credit Facility          
Long-term debt       $ 25,000 $ 0
Maximum borrowing capacity     $ 59,500    
Maximum borrowing capacity under uncommitted accordion feature     $ 150,000    
Commitment fee on unused daily average unutilized commitment (as a percent)     1.50%    
Drawdowns during the period $ 10,000 $ 25,000   $ 25,000  
Number of quarterly installments | installment     20    
Period after agreement date for first periodic payment     3 months    
LIBOR          
Line of Credit Facility          
Reference rate     LIBOR    
Minimum          
Line of Credit Facility          
Quarterly reduction of total amount committed     $ 1,641    
Minimum | LIBOR          
Line of Credit Facility          
Applicable margin over reference rate     3.40%    
Maximum          
Line of Credit Facility          
Quarterly reduction of total amount committed     $ 4,137    
Maximum | LIBOR          
Line of Credit Facility          
Applicable margin over reference rate     4.25%    
Capesize Vessel | Maximum          
Line of Credit Facility          
Number of additional vessels secured as collateral if accordion feature is exercised | item     6    
Supramax Vessel          
Line of Credit Facility          
Number of additional vessels secured as collateral if accordion feature is exercised | item     2