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Other Operational Gain (Details) (USD $)
12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Oct. 03, 2014
Jun. 28, 2013
Other Operational Gain [Line Items]          
Other operational gain $ 10,003,000us-gaap_OtherIncome $ 3,787,000us-gaap_OtherIncome $ 3,507,000us-gaap_OtherIncome    
Exinguishment of liability related to amount of fuel and lubricants remaining on board 1,361,000sblk_GainFromWriteOffLiability 0sblk_GainFromWriteOffLiability 0sblk_GainFromWriteOffLiability    
Gain from insurance claim 237,000sblk_GainFromInsuranceClaim 1,030,000sblk_GainFromInsuranceClaim 812,000sblk_GainFromInsuranceClaim    
Hull and Machinery Insurance Claim and Protection and Indemnity Claim          
Other Operational Gain [Line Items]          
Other operational gain 456,000us-gaap_OtherIncome
/ dei_LegalEntityAxis
= sblk_HullAndMachineryClaimMember
       
Star Borealis          
Other Operational Gain [Line Items]          
Proceeds received on transfer of claim       8,016,000sblk_ProceedsReceivedOnTransferClaim
/ dei_LegalEntityAxis
= sblk_StarBorealisIIMember
 
Gain on sale of claim 9,377,000sblk_GainLossOnSaleOfClaim
/ dei_LegalEntityAxis
= sblk_StarBorealisIIMember
       
Gross Daily Charter Rate         24,750sblk_GrossDailyCharterRate
/ dei_LegalEntityAxis
= sblk_StarBorealisIIMember
Exinguishment of liability related to amount of fuel and lubricants remaining on board 1,361,000sblk_GainFromWriteOffLiability
/ dei_LegalEntityAxis
= sblk_StarBorealisIIMember
       
Rebate from Company's previous manning agent          
Other Operational Gain [Line Items]          
Rebate from previous manning agent 170,000sblk_RebateAmount
/ dei_LegalEntityAxis
= sblk_PreviousManningAgentMember
       
Bhatia International Ltd          
Other Operational Gain [Line Items]          
Other operational gain   2,500,000us-gaap_OtherIncome
/ dei_LegalEntityAxis
= sblk_BhatiaInternationalLtdMember
2,514,000us-gaap_OtherIncome
/ dei_LegalEntityAxis
= sblk_BhatiaInternationalLtdMember
   
Korea Line Corporation          
Other Operational Gain [Line Items]          
Other operational gain   $ 177,000us-gaap_OtherIncome
/ dei_LegalEntityAxis
= sblk_KoreaLineCorporationMember
$ 157,000us-gaap_OtherIncome
/ dei_LegalEntityAxis
= sblk_KoreaLineCorporationMember