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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								8,050,000us-gaap_CommonStockSharesIssued	15,338,861us-gaap_CommonStockSharesIssued
Shares to acquire business	22,598us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued	54,104,200us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Granted			586,009us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	279,333us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	90,667us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Proceeds from issuance of common stock			$ 0us-gaap_ProceedsFromIssuanceOfCommonStock	$ 150,905us-gaap_ProceedsFromIssuanceOfCommonStock	$ 0us-gaap_ProceedsFromIssuanceOfCommonStock
Severance payments,common shares			168,842sblk_PaymentsForPostemploymentBenefitsShares
Equity Incentive Plan 2013
Common Stock:
Granted				239,333us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = sblk_EquityIncentivePlan2013Member
Company's former Director
Common Stock:
Granted				12,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = sblk_FormerDirectorMember		12,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = sblk_FormerDirectorMember
Former Chief Executive Officer
Common Stock:
Granted				18,667us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = sblk_FormerCEOMember
Severance payments,common shares							168,842sblk_PaymentsForPostemploymentBenefitsShares / us-gaap_PlanNameAxis = sblk_FormerCEOMember
Equity Incentive Plan 2014
Common Stock:
Granted			394,167us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = sblk_EquityIncentivePlan2014Member
Common Stock
Common Stock:
Common Stock - Shares Authorized			300,000,000us-gaap_CommonStockSharesAuthorized / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	300,000,000us-gaap_CommonStockSharesAuthorized / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember								300,000,000us-gaap_CommonStockSharesAuthorized / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	100,000,000us-gaap_CommonStockSharesAuthorized / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Common Stock - Par Value			$ 0.01us-gaap_CommonStockParOrStatedValuePerShare / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	$ 0.01us-gaap_CommonStockParOrStatedValuePerShare / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember								$ 0.01us-gaap_CommonStockParOrStatedValuePerShare / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	$ 0.01us-gaap_CommonStockParOrStatedValuePerShare / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Common shares offered in public offering				23,388,861us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember				8,050,000us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	15,338,861us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Public offering price								$ 8.8us-gaap_EquityIssuancePerShareAmount / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Offering expenses								2,716us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	2,167us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Common Stock - Shares Issued			109,426,236us-gaap_CommonStockSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	29,059,671us-gaap_CommonStockSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	5,400,810us-gaap_CommonStockSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember						5,357,224us-gaap_CommonStockSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Shares to acquire business		54,104,200us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Proceeds from issuance of common stock								$ 68,124us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	$ 77,898us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Preferred Stock
Preferred Stock:
Preferred Stock - Shares Authorized			25,000,000us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember	25,000,000us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Preferred Stock - Par Value			$ 0.01us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember	$ 0.01us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Preferred Stock - Shares Issued			0us-gaap_PreferredStockSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember	0us-gaap_PreferredStockSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Merger Shares Issuance
Common Stock:
Shares to acquire business		48,395,766us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_StatementEquityComponentsAxis = sblk_MergerSharesIssuanceMember
Heron Transactions Shares Issuance
Common Stock:
Shares to acquire vessels		2,115,706us-gaap_StockIssuedDuringPeriodSharesAcquisitions / us-gaap_StatementEquityComponentsAxis = sblk_HeronTransactionsSharesIssuanceMember
Pappas Transactions Shares Issuance
Common Stock:
Shares to acquire business		3,592,728us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_StatementEquityComponentsAxis = sblk_PappasTransactionSharesIssuanceMember
Interchart Acquisition Shares Issuance
Common Stock:
Shares to acquire business			22,598us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_StatementEquityComponentsAxis = sblk_InterchartAcquisitionSharesIssuanceMember
First Installment CEO | Equity Incentive Plan 2014
Common Stock:
Granted			9,333us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = sblk_EquityIncentivePlan2014Member / us-gaap_StatementEquityComponentsAxis = sblk_ChiefExecutiveOfficerFirstInstallmentMember
Excel Vessel Share Consideration
Common Stock:
Shares to acquire vessels			25,659,425us-gaap_StockIssuedDuringPeriodSharesAcquisitions / us-gaap_StatementEquityComponentsAxis = sblk_ExcelVesselShareConsiderationMember
Directors | Equity Incentive Plan 2014
Common Stock:
Granted			8,000us-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										29,917,312us-gaap_StockIssuedDuringPeriodSharesAcquisitions / us-gaap_StatementEquityComponentsAxis = sblk_DefinitiveAgrrementsIIMember

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Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration.

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