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Basis of Presentation and General Information (Details) | 6 Months Ended
--- | ---
Jun. 30, 2015 | Jul. 11, 2014 shares | Jun. 30, 2014 USD ($)
Vessels [Line Items] |  |  |
Date of Incorporation | Dec. 13, 2006 |  |
Shares to acquire business |  | 54,104,200 |
Daily Management Fee | $ |  |  | $ 750
Oceanbulk |  |  |
Vessels [Line Items] |  |  |
Shares to acquire business |  | 48,395,766 |
Oceanbulk | Vessels in operations |  |  |
Vessels [Line Items] |  |  |
Number of vessels acquired |  | 12 |
Oceanbulk | Vessels under construction |  |  |
Vessels [Line Items] |  |  |
Number of contracts for Newbuildings acquired |  | 25 |
Heron Ventures Ltd |  |  |
Vessels [Line Items] |  |  |
Shares to acquire vessels |  | 2,115,706 |
Heron Ventures Ltd | Kamsarmax vessels |  |  |
Vessels [Line Items] |  |  |
Number of vessels acquired |  | 2 |
Pappas Companies |  |  |
Vessels [Line Items] |  |  |
Shares to acquire business |  | 3,592,728 |
Pappas Companies | Vessels in operations |  |  |
Vessels [Line Items] |  |  |
Number of vessels acquired |  | 1 |
Pappas Companies | Vessels under construction |  |  |
Vessels [Line Items] |  |  |
Number of contracts for Newbuildings acquired |  | 1 |
Pro forma adjustments |  |  |
Vessels [Line Items] |  |  |
Acquisition related costs | $ |  |  | 2,363,000
Interest expense | $ |  |  | $ 1,816,000

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