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Voyage and Vessel operating expenses | 12 Months Ended
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Dec. 31, 2017
Voyage and Vessel Operating Expenses [Abstract] |
Voyage and Vessel operating expenses | 17. Voyage and Vessel operating expenses: The amounts in the accompanying consolidated statements of operations are analyzed as follows:
|  |  | 2015 |  |  | 2016 |  |  | 2017
Voyage expenses |  |  |  |  |  |  |  |  |
Port charges |  | $ | 17,619 |  | $ | 30,229 |  | $ | 21,060
Bunkers |  |  | 48,535 |  |  | 28,121 |  |  | 34,997
Commissions - third parties |  |  | 2,915 |  |  | 2,506 |  |  | 3,438
Commissions - related parties (Note 3) |  |  | 3,350 |  |  | 3,300 |  |  | 3,300
Miscellaneous |  |  | 458 |  |  | 1,665 |  |  | 1,887
Total voyage expenses |  | $ | 72,877 |  | $ | 65,821 |  | $ | 64,682
Vessel operating expenses |  |  |  |  |  |  |  |  |
Crew wages and related costs |  | $ | 65,402 |  | $ | 62,920 |  | $ | 63,074
Insurances |  |  | 8,026 |  |  | 6,124 |  |  | 6,314
Maintenance, repairs, spares and stores |  |  | 18,577 |  |  | 17,194 |  |  | 18,589
Lubricants |  |  | 8,187 |  |  | 6,372 |  |  | 7,016
Tonnage taxes |  |  | 3,717 |  |  | 2,438 |  |  | 2,565
Upgrading expenses |  |  | 6,205 |  |  | 1,784 |  |  | 1,925
Miscellaneous |  |  | 2,682 |  |  | 1,998 |  |  | 1,945
Total vessel operating expenses |  | $ | 112,796 |  | $ | 98,830 |  | $ | 101,428

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- Definition This entire disclosure for Voyage expenses (Port charges, bunkers, commissions charged by third parties, commissions charged by related parties) and Vessel Operating expenses (crew wages and related costs, insurances, repairs, spares and maintenance, consumable stores, tonnage taxes, miscellaneous). + References No definition available. + Details
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Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_CostsAndExpensesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration