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Vessels and Other Fixed Assets, Net (Details) (USD $)	12 Months Ended			7 Months Ended	9 Months Ended	6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jul. 22, 2014	Sep. 19, 2014	Jul. 11, 2014	Mar. 09, 2012	Feb. 22, 2012	Apr. 10, 2013	Mar. 14, 2013	Nov. 05, 2013	Jan. 24, 2014
Vessels [Line Items]
Vessel impairment loss	$ 0us-gaap_AssetImpairmentCharges	$ 0us-gaap_AssetImpairmentCharges	$ 303,219,000us-gaap_AssetImpairmentCharges
Loss on sale of vessel	0us-gaap_GainLossOnSaleOfPropertyPlantEquipment	(87,000)us-gaap_GainLossOnSaleOfPropertyPlantEquipment	(3,190,000)us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Payments to acquire property plant and equipment	518,447,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment	127,814,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment	91,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Advances from sale of vessel	1,100,000sblk_AdvancePaymentForVesselDisposal	0sblk_AdvancePaymentForVesselDisposal
Star Ypsilon
Vessels [Line Items]
Contracted sale / purchase price								9,126,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarYpsilonMember
Delivery date			Mar. 09, 2012
Metric tons of fuel oil								667sblk_FuelQuantity / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarYpsilonMember
Address commission			3.00%sblk_AddressCommissionPercentage / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarYpsilonMember
Brokerage commission			2.00%sblk_BrokerageCommissionPercentage / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarYpsilonMember
Carrying amount of vessel							11,152,000sblk_VesselNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarYpsilonMember
Loss on sale of vessel			(3,190,000)us-gaap_GainLossOnSaleOfPropertyPlantEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarYpsilonMember
Star Sigma
Vessels [Line Items]
Contracted sale / purchase price										9,044,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarSigmaMember
Delivery date		Apr. 10, 2013
Address commission		3.00%sblk_AddressCommissionPercentage / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarSigmaMember
Brokerage commission		1.00%sblk_BrokerageCommissionPercentage / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarSigmaMember
Carrying amount of vessel									8,354,000sblk_VesselNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarSigmaMember
Vessel impairment loss			3,205,000us-gaap_AssetImpairmentCharges / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarSigmaMember
Loss on sale of vessel		(87,000)us-gaap_GainLossOnSaleOfPropertyPlantEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarSigmaMember
Star Challenger
Vessels [Line Items]
Contracted sale / purchase price											28,760,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarChallenger1Member
Delivery date		Dec. 12, 2013
Brokerage commission		1.00%sblk_BrokerageCommissionPercentage / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarChallenger1Member
DWT		61,462sblk_VesselCapacity / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarChallenger1Member
Star Fighter
Vessels [Line Items]
Contracted sale / purchase price											28,760,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarFighter1Member
Delivery date		Dec. 30, 2013
Brokerage commission		1.00%sblk_BrokerageCommissionPercentage / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarFighter1Member
DWT		61,455sblk_VesselCapacity / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarFighter1Member
Star Vega
Vessels [Line Items]
Delivery date	Feb. 13, 2014
DWT	98,681sblk_VesselCapacity / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarVega2Member
Star Sirius
Vessels [Line Items]
Delivery date	Mar. 07, 2014
DWT	98,681sblk_VesselCapacity / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarSirius2Member
Star Sirius and Star Vega
Vessels [Line Items]
Contracted sale / purchase price												60,000,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarSiriusStarVega2Member
Gross Daily Charter Rate	15,000sblk_GrossDailyCharterRate / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarSiriusStarVega2Member
Brokerage commission	1.25%sblk_BrokerageCommissionPercentage / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarSiriusStarVega2Member
Peloreus
Vessels [Line Items]
Delivery date				Jul. 22, 2014
DWT				182,000sblk_VesselCapacity / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_Peloreus2Member
Payments to acquire property plant and equipment				34,625,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_Peloreus2Member
Peloreus - Financed by Deutsche Bank AG loan facility
Vessels [Line Items]
Payments to acquire property plant and equipment				32,500,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_PeloreusFinancedByLoanFacilityMember
Peloreus - Financed by existing cash
Vessels [Line Items]
Payments to acquire property plant and equipment				2,125,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_PeloreusFinancedByExistingCashMember
Leviathan
Vessels [Line Items]
Delivery date					Sep. 19, 2014
DWT					182,000sblk_VesselCapacity / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_Leviathan2Member
Payments to acquire property plant and equipment					34,625,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_Leviathan2Member
Leviathan - Financed by Deutche Bank AG loan facility
Vessels [Line Items]
Payments to acquire property plant and equipment					32,500,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_LeviathanFinancedByLoanFacilityMember
Leviathan - Financed by existing cash
Vessels [Line Items]
Payments to acquire property plant and equipment					2,125,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_LeviathanFinancedByExistingCashMember
Leviathan and Peloreus
Vessels [Line Items]
Assets fair value adjustment				20,600,000us-gaap_AssetsFairValueAdjustment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_LeviathanAndPeloreusMember
Excel vessels
Vessels [Line Items]
Contracted sale / purchase price	501,535,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselsIIMember
Vessels Delivered	28sblk_VesselsDelivered / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselsIIMember
Shares to acquire vessels	25,659,425us-gaap_StockIssuedDuringPeriodSharesAcquisitions / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselsIIMember
Payments to acquire property plant and equipment	248,751,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_ExcelVesselsIIMember
Held in escrow for Heron vessels
Vessels [Line Items]
Shares to acquire vessels						2,115,706us-gaap_StockIssuedDuringPeriodSharesAcquisitions / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_HeldInEscrowForHeronVesselsMember
Heron vessels
Vessels [Line Items]
Value of common shares issued for acquisition of Heron Vessels						25,080,000us-gaap_StockIssuedDuringPeriodValueAcquisitions / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_HeronVesselsIIMember
Payments to acquire property plant and equipment						25,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_HeronVesselsIIMember
Star Kim
Vessels [Line Items]
Delivery date	Jan. 01, 2015
DWT	38,858sblk_VesselCapacity / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarKimMember
Advances from sale of vessel	1,100,000sblk_AdvancePaymentForVesselDisposal / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_StarKimMember
Merger and Pappas Transaction
Vessels [Line Items]
Vessels Acquired						13sblk_VesselsAcquired / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_MergerPappasTransaction2Member
Fair value of vessels acquired						426,000,000us-gaap_FairValueOfAssetsAcquired / us-gaap_PropertyPlantAndEquipmentByTypeAxis = sblk_MergerPappasTransaction2Member

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