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Transactions with Related Parties - Additional Information - Other (Details) | 12 Months Ended |  | 12 Months Ended | 0 Months Ended | 1 Months Ended |  |  |  |  |  | 6 Months Ended
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Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Feb. 25, 2014 | Dec. 31, 2014 Combine Marine Ltd. USD ($) | Dec. 31, 2014 Combine Marine Ltd. EUR (€) | Nov. 25, 2013 Oceanbulk Maritime S.A. (d) USD ($) | Apr. 30, 2014 Oceanbulk Maritime S.A. (d) USD ($) | Dec. 31, 2013 Oceanbulk Maritime S.A. (d) USD ($) | Jun. 01, 2014 Oceanbulk Maritime S.A. (d) USD ($) | Mar. 22, 2014 Oceanbulk Maritime S.A. (d) USD ($) | Dec. 31, 2014 Managed Vessels of Oceanbulk Shipping LLC USD ($) | Oct. 01, 2013 Product Shipping & Trading S.A USD ($) | Jun. 07, 2013 Product Shipping & Trading S.A USD ($) | Jul. 11, 2014 Oaktree Shareholder Agreement
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rent expense per month |  |  |  |  | $ 3,000 sblk_RentExpensePerMonth / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sblk_CombineMarineLtdMember | € 2,500 sblk_RentExpensePerMonth / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sblk_CombineMarineLtdMember |  |  |  |  |  |  |  |  |
Exchange rate EUR/USD | 1.22 us-gaap_ForeignCurrencyExchangeRateTranslation1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Daily fixed management fee | 750 sblk_DailyManagementFee |  |  |  |  |  |  |  |  | 110 sblk_DailyManagementFee / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sblk_OceanbulkMaritimeMember | 170 sblk_DailyManagementFee / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sblk_OceanbulkMaritimeMember | 750 sblk_DailyManagementFee / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sblk_ManagedVesselsOceanBulkShippingMember | 20 sblk_DailyManagementFee / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sblk_ProductShippingTradingMember | 130 sblk_DailyManagementFee / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sblk_ProductShippingTradingMember |
Vessel acquisition commission percentage |  |  |  |  |  |  | 0.50%sblk_VesselAcquisitionCommissionPercentage / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sblk_OceanbulkMaritimeMember |  |  |  |  |  |  |  |
Pre-delivery installments | 518,447,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | 127,814,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | 91,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment |  |  |  |  | 519,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sblk_OceanbulkMaritimeMember | 519,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sblk_OceanbulkMaritimeMember |  |  |  |  |  |
Related Parties Commissions Fees | 1,997,000 sblk_RelatedPartiesCommissionsFees | 773,000 sblk_RelatedPartiesCommissionsFees | 1,134,000 sblk_RelatedPartiesCommissionsFees |  |  |  | 2,077,000 sblk_RelatedPartiesCommissionsFees / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sblk_OceanbulkMaritimeMember |  |  |  |  |  |  |  |
Flat fee per vessel |  |  |  |  |  |  | $ 200,000 sblk_FlatFeePerVessel / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sblk_OceanbulkMaritimeMember |  |  |  |  |  |  |  |
Voting percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 33.00%us-gaap_VariableInterestEntityOwnershipPercentage / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sblk_OaktreeAgreementMember
Equity Method Investment Ownership Percentage |  |  |  | 33.00%us-gaap_EquityMethodInvestmentOwnershipPercentage |  |  |  |  |  |  |  |  |  |  | 61.30%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sblk_OaktreeAgreementMember
Shareholder Agreement Directors Nomination Right |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Under the Oaktree Shareholders Agreement, Oaktree has the right to nominate four of the Company's nine directors so long as it beneficially owns 40% or more of the Company's outstanding voting securities. The number of directors able to be designated by Oaktree is reduced to three directors if Oaktree beneficially owns 25% or more but less than 40% of the Company's outstanding voting securities, to two directors if Oaktree beneficially owns 15% or more but less than 25%, and to one director if Oaktree beneficially owns 5% or more but less than 15%. Oaktree's designation rights terminate if it beneficially owns less than 5% of the Company's outstanding voting securities.

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- Definition Flat fee charged per each newbuilding vessel, as commission fee relative to the negotiations with the shipyards on the construction of the Company's contracted newbuilding vessels. + References No definition available. + Details
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- Definition Primarily represents commissions incurred in the period based upon the sale by related parties of the entity's goods or services, and fees for sales assistance or product enhancements performed by related parties (such as a distributor or value added reseller). + References No definition available. + Details
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- Definition Description of the shareholders agreement under which the shareholders have the right to nominate specific number of directors, according to the percentage of voting securities. + References No definition available. + Details
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- Definition Commission paid to an entity related to negotiations made, with a shipyard, regarding a vessel acquisition. + References No definition available. + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=28200181&loc=SL6759159-111685 + Details
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