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Commitments and Contingencies - Environmental (Details) In Thousands, unless otherwise specified | 12 Months Ended | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2012 USD ($) | Mar. 31, 2012 Star Cosmo USD ($) | Mar. 31, 2012 Star Cosmo EUR (€) | Jul. 31, 2011 Star Cosmo USD ($) | Jul. 31, 2011 Star Cosmo EUR (€) | Dec. 31, 2012 Star Cosmo USD ($) | Dec. 31, 2012 Star Cosmo EUR (€)
Vessels [Line Items] |  |  |  |  |  |  |
Cash collateral for pollution |  |  |  | $ 448 | € 340 | $ 343 | € 260
Release of cash collateral for polution |  | 448 | 340 |  |  |  |
Coverage for pollution | 1,000,000 |  |  |  |  |  |
Address commission | $ 2,018 |  |  |  |  |  |

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- Definition Commission payable by the shipowner to the charterer. + References No definition available. + Details
Name: | sblk_AddressCommission
Namespace Prefix: | sblk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Cash collateral for environmental polution. + References No definition available. + Details
Name: | sblk_CashCollateralForPollution
Namespace Prefix: | sblk_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
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- Definition Cash collateral for environmental polution released after being covered by Protection and Idemnity (P&I) Club insurance. + References No definition available. + Details
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Namespace Prefix: | sblk_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum amount of Protection and Indemnity (P&I) insurance coverage for pollution, per vessel per incident. + References No definition available. + Details
Name: | sblk_InsuranceCoverageMaximumAmount
Namespace Prefix: | sblk_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
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Balance Type: | na
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