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Voyage and Vessel Operating Expenses - Vessel Operating Expenses (Table) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Vessel operating expenses |  |  |
Crew wages and related costs | $ 14,355 | $ 14,498 | $ 12,938
Insurances | 2,968 | 2,655 | 2,399
Maintenance, Repairs, Spares and Stores | 5,772 | 6,779 | 6,130
Lubricants | 2,339 | 3,046 | 2,189
Tonnage taxes | 797 | 169 | 123
Upgrading expenses | 205 | 19 | 789
Miscellaneous | 651 | 666 | 679
Total vessel operating expenses | $ 27,087 | $ 27,832 | $ 25,247

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