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Commitments and Contingencies (Details)
 12 Months Ended 1 Months Ended 12 Months Ended 0 Months Ended 6 Months Ended 12 Months Ended 3 Months Ended
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Mar. 31, 2012
Star Cosmo
EUR (€)
Jul. 31, 2011
Star Cosmo
USD ($)
Jul. 31, 2011
Star Cosmo
EUR (€)
Dec. 31, 2014
Star Cosmo reduced amount
USD ($)
Dec. 31, 2014
Star Cosmo reduced amount
EUR (€)
Oct. 03, 2014
Star Borealis
USD ($)
Jun. 28, 2013
Star Borealis
USD ($)
Dec. 31, 2014
Star Borealis
USD ($)
Mar. 31, 2015
Finalized fine
USD ($)
Mar. 31, 2015
Finalized fine
EUR (€)
Vessels [Line Items]                          
Cash collateral for pollution         $ 415,000sblk_CashCollateralForPollution
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= sblk_StarCosmoMember		 € 340,000sblk_CashCollateralForPollution
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= sblk_StarCosmoMember		 $ 317,000sblk_CashCollateralForPollution
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= sblk_StarCosmoReducedAmountMember		 € 260,000sblk_CashCollateralForPollution
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= sblk_StarCosmoReducedAmountMember		       $ 73,200sblk_CashCollateralForPollution
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= sblk_FinalizedFineMember		 € 60,000sblk_CashCollateralForPollution
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= sblk_FinalizedFineMember
Cash collateral for pollution release       340,000sblk_CashCollateralForPollutionRelease
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= sblk_StarCosmoMember		                  
Coverage for pollution 1,000,000,000sblk_InsuranceCoverageMaximumAmount                        
Charter hire variable portion 6-month Libor rate of 0.3628%                        
Gross daily charter rate                   24,750sblk_GrossDailyCharterRate
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= sblk_StarBorealisIIIMember		      
Proceeds received on transfer of claim                 8,016,000sblk_ProceedsReceivedOnTransferClaim
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= sblk_StarBorealisIIIMember		        
Gain on sale of claim                     9,337,000sblk_GainLossOnSaleOfClaim
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= sblk_StarBorealisIIIMember		    
Exinguishment of liability related to amount of fuel and lubricants remaining on board $ 1,361,000sblk_GainFromWriteOffLiability $ 0sblk_GainFromWriteOffLiability $ 0sblk_GainFromWriteOffLiability               $ 1,361,000sblk_GainFromWriteOffLiability
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= sblk_StarBorealisIIIMember