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Subsequent Events (Details) (Star Sigma [Member], USD $) In Thousands, unless otherwise specified | Mar. 14, 2013 | Dec. 31, 2012
--- | --- | ---
Star Sigma [Member] |  |
Subequent Events [Line Items] |  |
Contracted price | $ 9,041 |
Sale commission | 5.00% |
Carrying amount of vessel |  | $ 8,640

X
- Definition The carrying amount of the vessel. + References No definition available. + Details
Name: | sblk_VesselNet
Namespace Prefix: | sblk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The percentage on the sale price charged as commission for the vessel sale, consisting of address and brokerage commission. + References No definition available. + Details
Name: | sblk_VesselSaleCommissionPercentage
Namespace Prefix: | sblk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The value of all consideration given or received by the Entity in the significant acquisition or disposal. + References No definition available. + Details
Name: | us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration