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Voyage and Vessel Operating Expenses (Tables) | 12 Months Ended
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Dec. 31, 2014
Voyage and Vessel Operating Expenses [Abstract] |
Voyage expenses |
|  |  | 2012 |  |  | 2013 |  |  | 2014 |
Voyage expenses |  |  |  |  |  |  |  |  |  |
Port charges |  | $ | 2,484 |  | $ | 1,455 |  | $ | 5,132 |
Bunkers |  |  | 10,788 |  |  | 4,338 |  |  | 33,146 |
Commissions - third parties |  |  | 947 |  |  | 867 |  |  | 1,902 |
Commissions - related parties (Note 3) |  |  | 1,134 |  |  | 773 |  |  | 1,997 |
Chartered-in vessel expenses |  |  | 4,050 |  |  | - |  |  | - |
Miscellaneous |  |  | 195 |  |  | 116 |  |  | 164 |
Total voyage expenses |  | $ | 19,598 |  | $ | 7,549 |  | $ | 42,341 |
Vessel operating expenses |
Vessel operating expenses |  |  |  |  |  |  |  |  |  |
Crew wages and related costs |  | $ | 14,498 |  | $ | 14,355 |  | $ | 29,449 |
Insurances |  |  | 2,655 |  |  | 2,968 |  |  | 4,561 |
Maintenance, repairs, spares and stores |  |  | 6,779 |  |  | 5,772 |  |  | 9,415 |
Lubricants |  |  | 3,046 |  |  | 2,339 |  |  | 3,901 |
Tonnage taxes |  |  | 169 |  |  | 797 |  |  | 1,360 |
Upgrading expenses |  |  | 19 |  |  | 205 |  |  | 3,167 |
Miscellaneous |  |  | 666 |  |  | 651 |  |  | 1,243 |
Total vessel operating expenses |  | $ | 27,832 |  | $ | 27,087 |  | $ | 53,096 |

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