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Transactions with Related Parties - Statements of Operations (Table) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Related Party Transaction [Line Items] |  |  |
Consultancy fees | $ (496) |  |
Office rent | (3,550) | $ (1,025) | $ 0
Voyage expenses | (3,300) | (3,350) | (1,997)
Management fee expense | (7,604) | (8,436) | (158)
Interest expense | (40,449) | (35,969) | (15,362)
Management fee income | 119 | 251 | 2,346
Executive directors |  |  |
Related Party Transaction [Line Items] |  |  |
Consultancy fees | (496) | (633) | (1,516)
Non-executive directors |  |  |
Related Party Transaction [Line Items] |  |  |
Compensation | (148) | (160) | (191)
Combine Marine Ltd. |  |  |
Related Party Transaction [Line Items] |  |  |
Office rent | (34) | (35) | (42)
Interchart |  |  |
Related Party Transaction [Line Items] |  |  |
Voyage expenses | (3,300) | (3,350) | (1,997)
Oceanbulk Maritime S.A. |  |  |
Related Party Transaction [Line Items] |  |  |
Management fee expense | 0 | 0 | (158)
Management fee income | 0 | 0 | 188
Maryville Maritime Inc. |  |  |
Related Party Transaction [Line Items] |  |  |
Management fee expense | 0 | (451) | (35)
Excel Vessel Bridge Facility |  |  |
Related Party Transaction [Line Items] |  |  |
Interest expense | 0 | (220) | (1,659)
Managed Vessels of Oceanbulk Shipping LLC |  |  |
Related Party Transaction [Line Items] |  |  |
Management fee income | 0 | 0 | 1,390
Product Shipping & Trading S.A. |  |  |
Related Party Transaction [Line Items] |  |  |
Management fee income | $ 0 | $ 0 | $ 62

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