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Management fees (Details) - USD ($) | 6 Months Ended
--- | ---
Jun. 30, 2017 | Jun. 30, 2016
Counterparty [Line Items] |  |
Management fees | $ 3,689,000 | $ 3,911,000
Ship Procurement Services S.A. ("SPS") |  |
Counterparty [Line Items] |  |
Procurement services daily fee | 295 |
Management fees | $ 3,689,000 | $ 3,911,000

X
- Definition The daily fee per vessel for procurement services. + References No definition available. + Details
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Namespace Prefix: | sblk_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Professional and contract service expense includes cost reimbursements for support services related to contracted projects, outsourced management, technical and staff support. + References No definition available. + Details
Name: | us-gaap_ProfessionalAndContractServicesExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_CounterpartyNameAxis=sblk_ShipProcurementServicesS.A.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |