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Subsequent Events, textual (Details) - USD ($)
1 Months Ended 12 Months Ended
Jan. 31, 2017
Dec. 31, 2016
Hull No. 1551    
Line of credit    
Sales Fees   $ 0
Subsequent Events | Pedhoulas Rose    
Line of credit    
Sale and leaseback period 10 years  
Daily bareboat charter rate $ 6,500  
Sale Leaseback Transaction Purchase Price 14,500,000  
Subsequent Events | Hull No. 1551    
Line of credit    
Sales Fees $ 0  
Subsequent Events | Preferred Shares    
Dividend declaration    
Dividends Payable, Amount Per Share $ 0.5  
Dividends Payable $ 3,495,000  
Dividends Payable, Date Of Record Jan. 23, 2017  
Dividends Payable, Date to be Paid Jan. 30, 2017