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Preferred, Common Stock and Additional Paid in Capital - Equity (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 0 Months Ended | 6 Months Ended | 12 Months Ended | 0 Months Ended | 8 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 25, 2014 | Jul. 11, 2014 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Mar. 21, 2013 | Aug. 04, 2014 | Oct. 07, 2013 | Jul. 25, 2013 | Aug. 19, 2014 | Dec. 31, 2011 | Nov. 23, 2009 | Nov. 22, 2009
Common Stock: |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock - Shares Issued |  |  |  |  |  |  |  | 8,050,000 us-gaap_CommonStockSharesIssued | 15,338,861 us-gaap_CommonStockSharesIssued |  |  |  |
Shares to acquire business | 22,598 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued | 54,104,200 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued |  |  |  |  |  |  |  |  |  |  |
Granted |  |  | 586,009 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod | 279,333 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod | 90,667 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod |  |  |  |  |  |  |  |
Proceeds from issuance of common stock |  |  | $ 0 us-gaap_ProceedsFromIssuanceOfCommonStock | $ 150,905 us-gaap_ProceedsFromIssuanceOfCommonStock | $ 0 us-gaap_ProceedsFromIssuanceOfCommonStock |  |  |  |  |  |  |  |
Severance payments,common shares |  |  | 168,842 sblk_PaymentsForPostemploymentBenefitsShares |  |  |  |  |  |  |  |  |  |
Equity Incentive Plan 2013 |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock: |  |  |  |  |  |  |  |  |  |  |  |  |
Granted |  |  |  | 239,333 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = sblk_EquityIncentivePlan2013Member |  |  |  |  |  |  |  |  |
Company's former Director |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock: |  |  |  |  |  |  |  |  |  |  |  |  |
Granted |  |  |  | 12,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = sblk_FormerDirectorMember |  | 12,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = sblk_FormerDirectorMember |  |  |  |  |  |  |
Former Chief Executive Officer |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock: |  |  |  |  |  |  |  |  |  |  |  |  |
Granted |  |  |  | 18,667 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = sblk_FormerCEOMember |  |  |  |  |  |  |  |  |
Severance payments,common shares |  |  |  |  |  |  | 168,842 sblk_PaymentsForPostemploymentBenefitsShares / us-gaap_PlanNameAxis = sblk_FormerCEOMember |  |  |  |  |  |
Equity Incentive Plan 2014 |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock: |  |  |  |  |  |  |  |  |  |  |  |  |
Granted |  |  | 394,167 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = sblk_EquityIncentivePlan2014Member |  |  |  |  |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock: |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock - Shares Authorized |  |  | 300,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 300,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  | 300,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 100,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Common Stock - Par Value |  |  | $ 0.01 us-gaap_CommonStockParOrStatedValuePerShare / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 0.01 us-gaap_CommonStockParOrStatedValuePerShare / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  | $ 0.01 us-gaap_CommonStockParOrStatedValuePerShare / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 0.01 us-gaap_CommonStockParOrStatedValuePerShare / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Common shares offered in public offering |  |  |  | 23,388,861 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | 8,050,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 15,338,861 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Public offering price |  |  |  |  |  |  |  | $ 8.8 us-gaap_EquityIssuancePerShareAmount / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Offering expenses |  |  |  |  |  |  |  | 2,716 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 2,167 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Common Stock - Shares Issued |  |  | 109,426,236 us-gaap_CommonStockSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 29,059,671 us-gaap_CommonStockSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 5,400,810 us-gaap_CommonStockSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  | 5,357,224 us-gaap_CommonStockSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |
Shares to acquire business |  | 54,104,200 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock |  |  |  |  |  |  |  | $ 68,124 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 77,898 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock: |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock - Shares Authorized |  |  | 25,000,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 25,000,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember |  |  |  |  |  |  |  |  |
Preferred Stock - Par Value |  |  | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember |  |  |  |  |  |  |  |  |
Preferred Stock - Shares Issued |  |  | 0 us-gaap_PreferredStockSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 0 us-gaap_PreferredStockSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember |  |  |  |  |  |  |  |  |
Merger Shares Issuance |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock: |  |  |  |  |  |  |  |  |  |  |  |  |
Shares to acquire business |  | 48,395,766 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_StatementEquityComponentsAxis = sblk_MergerSharesIssuanceMember |  |  |  |  |  |  |  |  |  |  |
Heron Transactions Shares Issuance |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock: |  |  |  |  |  |  |  |  |  |  |  |  |
Shares to acquire vessels |  | 2,115,706 us-gaap_StockIssuedDuringPeriodSharesAcquisitions / us-gaap_StatementEquityComponentsAxis = sblk_HeronTransactionsSharesIssuanceMember |  |  |  |  |  |  |  |  |  |  |
Pappas Transactions Shares Issuance |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock: |  |  |  |  |  |  |  |  |  |  |  |  |
Shares to acquire business |  | 3,592,728 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_StatementEquityComponentsAxis = sblk_PappasTransactionSharesIssuanceMember |  |  |  |  |  |  |  |  |  |  |
Interchart Acquisition Shares Issuance |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock: |  |  |  |  |  |  |  |  |  |  |  |  |
Shares to acquire business |  |  | 22,598 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_StatementEquityComponentsAxis = sblk_InterchartAcquisitionSharesIssuanceMember |  |  |  |  |  |  |  |  |  |
First Installment CEO | Equity Incentive Plan 2014 |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock: |  |  |  |  |  |  |  |  |  |  |  |  |
Granted |  |  | 9,333 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = sblk_EquityIncentivePlan2014Member / us-gaap_StatementEquityComponentsAxis = sblk_ChiefExecutiveOfficerFirstInstallmentMember |  |  |  |  |  |  |  |  |  |
Excel Vessel Share Consideration |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock: |  |  |  |  |  |  |  |  |  |  |  |  |
Shares to acquire vessels |  |  | 25,659,425 us-gaap_StockIssuedDuringPeriodSharesAcquisitions / us-gaap_StatementEquityComponentsAxis = sblk_ExcelVesselShareConsiderationMember |  |  |  |  |  |  |  |  |  |
Directors | Equity Incentive Plan 2014 |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock: |  |  |  |  |  |  |  |  |  |  |  |  |
Granted |  |  | 8,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = sblk_EquityIncentivePlan2014Member / us-gaap_StatementEquityComponentsAxis = sblk_DirectorsMember |  |  |  |  |  |  |  |  |  |
Definitive Agreements with Excel Maritime Carriers Ltd. |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock: |  |  |  |  |  |  |  |  |  |  |  |  |
Shares to acquire vessels |  |  |  |  |  |  |  |  |  | 29,917,312 us-gaap_StockIssuedDuringPeriodSharesAcquisitions / us-gaap_StatementEquityComponentsAxis = sblk_DefinitiveAgrrementsIIMember |  |  |

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