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Basis of Presentation and General Information, textuals (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 USD ($) item shares | Dec. 11, 2007 item
General Information |  |
Entity Incorporation, Date of Incorporation | Dec. 11, 2007 |
Entity Incorporation, State Country Name | Republic of the Marshall Islands |
Percentage Of Ownership In Subsidiaries |  | 100.00%
Number of subsidiaries owned by the entity | 46 | 19
Number of drybulk vessels | 37 |
Number Of Newbuild Vessels | 2 |
Number of additional public common stock offerings | 5 |
Number of additional public preferred stock offerings | 3 |
Cumulative redeemable perpetual preferred equity | $ | $ 16,900 |
Private Placement | Series A Preferred Stock |  |
Pinewood transaction [Line Items] |  |
Number of shares issued in transaction | shares | 100 |

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