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Basis of Presentation and General Information - The Excel Transactions (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 0 Months Ended | 6 Months Ended | 12 Months Ended | 0 Months Ended
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Feb. 25, 2014 | Jul. 11, 2014 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Aug. 19, 2014
Vessels [Line Items] |  |  |  |  |  |
Shares to acquire business | 22,598 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued | 54,104,200 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued |  |  |  |
Payment to acquire business | $ 200 us-gaap_PaymentsToAcquireBusinessesGross |  |  |  |  |
Payments to acquire property plant and equipment |  |  | 518,447 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | 127,814 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | 91 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment |
Excel vessels |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |
Vessels Delivered |  |  | 28 sblk_VesselsDelivered / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselsIIMember |  |  |
Payments to acquire property plant and equipment |  |  | 248,751 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselsIIMember |  |  |
Shares to acquire vessels |  |  | 25,659,425 us-gaap_StockIssuedDuringPeriodSharesAcquisitions / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselsIIMember |  |  |
Excel vessels Capesize |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |
Vessels Acquired |  |  |  |  |  | 6 sblk_VesselsAcquired / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselsCapesizeIIMember
Excel vessels Kamsarmax |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |
Vessels Acquired |  |  |  |  |  | 14 sblk_VesselsAcquired / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselsKamsarmaxIIMember
Excel vessels Panamax |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |
Vessels Acquired |  |  |  |  |  | 12 sblk_VesselsAcquired / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselsPanamaxIIMember
Excel vessels Handymax |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |
Vessels Acquired |  |  |  |  |  | 2 sblk_VesselsAcquired / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselsHandymaxIIMember
Excel vessel Bridge Facility |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |
Loan amount |  |  |  |  |  | 231,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselBridgeFacilityIIMember
Definitive Agreements with Excel Maritime Carriers Ltd. |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |
Vessels Acquired |  |  |  |  |  | 34 sblk_VesselsAcquired / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_DefinitiveAgrrementsMember
Payments to acquire property plant and equipment |  |  |  |  |  | $ 288,391 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_DefinitiveAgrrementsMember
Shares to acquire vessels |  |  |  |  |  | 29,917,312 us-gaap_StockIssuedDuringPeriodSharesAcquisitions / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_DefinitiveAgrrementsMember

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- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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