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Basis of Presentation and General Information, Charter Revenue (Details) - Charter Revenues
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Glencore Agriculture B.V.      
Concentration Risk [Line Items]      
Charterer percentage in total revenue 21.03% 14.73% 0.00%
Bunge S.A      
Concentration Risk [Line Items]      
Charterer percentage in total revenue 10.37% 13.76% 12.72%