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Transactions with related parties, detail 3 (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Related Party Transaction [Line Items]    
Due to related parties $ 657 $ 318
[DianaShippingServicesSaMember]
   
Related Party Transaction [Line Items]    
Due to related parties $ 612 $ 263