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Voyage and Vessel Operating Expenses - Vessel Operating Expenses (Table) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Vessel operating expenses
Crew wages and related costs	$ 29,449us-gaap_SalariesAndWages	$ 14,355us-gaap_SalariesAndWages	$ 14,498us-gaap_SalariesAndWages
Insurances	4,561us-gaap_GeneralInsuranceExpense	2,968us-gaap_GeneralInsuranceExpense	2,655us-gaap_GeneralInsuranceExpense
Maintenance, repairs, spares and stores	9,415us-gaap_DirectOperatingMaintenanceSuppliesCosts	5,772us-gaap_DirectOperatingMaintenanceSuppliesCosts	6,779us-gaap_DirectOperatingMaintenanceSuppliesCosts
Lubricants	3,901sblk_LubricantsExpense	2,339sblk_LubricantsExpense	3,046sblk_LubricantsExpense
Tonnage taxes	1,360sblk_TonnageTax	797sblk_TonnageTax	169sblk_TonnageTax
Upgrading expenses	3,167sblk_UpgradingExpense	205sblk_UpgradingExpense	19sblk_UpgradingExpense
Miscellaneous	1,243us-gaap_OtherCostAndExpenseOperating	651us-gaap_OtherCostAndExpenseOperating	666us-gaap_OtherCostAndExpenseOperating
Total vessel operating expenses	$ 53,096us-gaap_OperatingCostsAndExpenses	$ 27,087us-gaap_OperatingCostsAndExpenses	$ 27,832us-gaap_OperatingCostsAndExpenses

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- Definition

The cost of lubricants consumed during the period.

+ References

No definition available.

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- Definition

The tonnage taxes for the period.

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The upgrading expenses incurred during the period.

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- Definition

Costs of maintenance supplies used that are directly related to goods produced and sold, or services rendered, during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2(a),(d))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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- Definition

The expense in the period incurred with respect to protection provided by insurance entities against risks other than risks associated with production (which are allocated to cost of sales).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.4)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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- Definition

Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense.

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- Definition

The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.3)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

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-Number 210

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Expenditures for salaries other than officers. Does not include allocated share-based compensation, pension and post-retirement benefit expense or other labor-related non-salary expense. For commercial and industrial companies, excludes any direct and overhead labor that is included in cost of goods sold.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.4)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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