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Voyage and Vessel operating expenses (Tables) | 12 Months Ended
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Dec. 31, 2016
Voyage and Vessel Operating Expenses [Abstract] |
Voyage expenses |
|  |  | 2014 |  |  | 2015 |  |  | 2016
Voyage expenses |  |  |  |  |  |  |  |  |
Port charges |  | $ | 5,132 |  | $ | 17,619 |  | $ | 30,229
Bunkers |  |  | 33,146 |  |  | 48,535 |  |  | 28,121
Commissions - third parties |  |  | 1,902 |  |  | 2,915 |  |  | 2,506
Commissions - related parties (Note 3) |  |  | 1,997 |  |  | 3,350 |  |  | 3,300
Miscellaneous |  |  | 164 |  |  | 458 |  |  | 1,665
Total voyage expenses |  | $ | 42,341 |  | $ | 72,877 |  | $ | 65,821
Vessel operating expenses |
Vessel operating expenses |  |  |  |  |  |  |  |  |
Crew wages and related costs |  | $ | 29,449 |  | $ | 65,402 |  | $ | 62,920
Insurances |  |  | 4,561 |  |  | 8,026 |  |  | 6,124
Maintenance, repairs, spares and stores |  |  | 9,415 |  |  | 18,577 |  |  | 17,194
Lubricants |  |  | 3,901 |  |  | 8,187 |  |  | 6,372
Tonnage taxes |  |  | 1,360 |  |  | 3,717 |  |  | 2,438
Upgrading expenses |  |  | 3,167 |  |  | 6,205 |  |  | 1,784
Miscellaneous |  |  | 1,243 |  |  | 2,682 |  |  | 1,998
Total vessel operating expenses |  | $ | 53,096 |  | $ | 112,796 |  | $ | 98,830

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