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Management fees (Details Narrative) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Management Fees |  |  |
Management fees | $ 18,405 | $ 17,500 | $ 11,321

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- References No definition available. + Details
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Namespace Prefix: | sblk_
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