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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
	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	22,598us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued	54,104,200us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Payment to acquire business	$ 200us-gaap_PaymentsToAcquireBusinessesGross
Payments to acquire property plant and equipment			518,447us-gaap_PaymentsToAcquirePropertyPlantAndEquipment	127,814us-gaap_PaymentsToAcquirePropertyPlantAndEquipment	91us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Excel vessels
Vessels [Line Items]
Vessels Delivered			28sblk_VesselsDelivered / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselsIIMember
Payments to acquire property plant and equipment			248,751us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselsIIMember
Shares to acquire vessels			25,659,425us-gaap_StockIssuedDuringPeriodSharesAcquisitions / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselsIIMember
Excel vessels Capesize
Vessels [Line Items]
Vessels Acquired						6sblk_VesselsAcquired / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselsCapesizeIIMember
Excel vessels Kamsarmax
Vessels [Line Items]
Vessels Acquired						14sblk_VesselsAcquired / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselsKamsarmaxIIMember
Excel vessels Panamax
Vessels [Line Items]
Vessels Acquired						12sblk_VesselsAcquired / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselsPanamaxIIMember
Excel vessels Handymax
Vessels [Line Items]
Vessels Acquired						2sblk_VesselsAcquired / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselsHandymaxIIMember
Excel vessel Bridge Facility
Vessels [Line Items]
Loan amount						231,000us-gaap_DebtInstrumentFaceAmount / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselBridgeFacilityIIMember
Definitive Agreements with Excel Maritime Carriers Ltd.
Vessels [Line Items]
Vessels Acquired						34sblk_VesselsAcquired / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_DefinitiveAgrrementsMember
Payments to acquire property plant and equipment						$ 288,391us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_DefinitiveAgrrementsMember
Shares to acquire vessels						29,917,312us-gaap_StockIssuedDuringPeriodSharesAcquisitions / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_DefinitiveAgrrementsMember

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