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Voyage Revenues (Table) (Details) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Voyage revenues | $ 511,878 | $ 306,996
Time charters [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Voyage revenues | 248,067 | 125,619
Voyage charters [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Voyage revenues | 268,191 | 181,781
Pool adjustment [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Voyage revenues | $ (4,380) | $ (404)

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- Definition Revenues arising from services provided to charterers according to the terms and conditions included in charter agreements. Voyage revenues may include the amortization of above/below market acquired time charter. + References No definition available. + Details
Name: | SBLK_VoyageRevenues
Namespace Prefix: | SBLK_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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- Details
Name: | srt_StatementScenarioAxis=SBLK_TimeCharterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementScenarioAxis=SBLK_VoyageContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementScenarioAxis=SBLK_PoolingArrangementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |