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Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounting Policies [Abstract]
Vessels' depreciation method	straight-line basis
Vessel's useful life	25 years
Provision for doubtful receivables	$ 0us-gaap_AllowanceForDoubtfulAccountsReceivable	$ 0us-gaap_AllowanceForDoubtfulAccountsReceivable
Vessel salvage value per LWT	200
Fleet utilization assumption	98.00%sblk_FleetUtilizationAssumption
Inflation assumption	3.00%sblk_InflationAssumption
Vessel impairment loss	0us-gaap_AssetImpairmentCharges	0us-gaap_AssetImpairmentCharges	303,219,000us-gaap_AssetImpairmentCharges
Sensitivity analysis description	In particular, the Company modified the utilization ratio, reducing it from approximately 98% to approximately 92% under a worst case scenario, in order to illustrate the increased idle time of vessels under a weak market environment.
Assets held for sale	0us-gaap_AssetsHeldForSaleLongLivedFairValueDisclosure	0us-gaap_AssetsHeldForSaleLongLivedFairValueDisclosure
Annual average BDI price		$ 1,206sblk_AnnualAverageBalticDryIndexPrice	$ 920sblk_AnnualAverageBalticDryIndexPrice

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- Definition

The annual average price of the Baltic Dry Index.

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- Definition

The fleet utilization rate assumption used in the impairment test of long lived assets.

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The assumption for the average rate of inflation.

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- Definition

The estimated vessels' salvage value per lightweight ton.

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- Definition

For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 4

-Article 5



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

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-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524



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-Name Accounting Standards Codification

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-Section S99

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585



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- Definition

Fair value portion of assets classified as held for sale.

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

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-Name Accounting Standards Codification

-Topic 820

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-Section 50

-Paragraph 1

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Description of the sensitivity of the fair value measurements to changes in unobservable inputs and the inter-relationships between those inputs as well as how those inter-relationships might magnify or mitigate the effect of changes in the unobservable inputs on the fair value measurements.

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Description of the methodology for computing depreciation for classes of depreciable assets.

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-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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