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Gain on Time Charter Agreement Termination (Details) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | 56 Months Ended |  | 0 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Oct. 29, 2013 Star Sigma | Jan. 04, 2012 Star Sigma | Jan. 04, 2012 Star Sigma - Amount received in cash | Jan. 04, 2012 Star Sigma - Value of fuels received as compensation
Fair Value of Above/Below Market Acquired Time Charters and Gain/Loss on Time Charter Agreement Termination [Line Items] |  |  |  |  |  |
Gain on time charter agreement termination | $ 0 | $ 6,454 |  |  | $ 5,734 | $ 720
Metric tons of fuel oil |  |  |  | 1,027 |  |
Gross daily charter rate |  |  | $ 38 |  |  |

X
- Definition The quantity of oil fuel that was delivered with the delivery of the vessel, in metric tons. + References No definition available. + Details
Name: | sblk_FuelQuantity
Namespace Prefix: | sblk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The gain recognized on termination of a contract. + References No definition available. + Details
Name: | sblk_GainOnTimeCharterAgreementTermination
Namespace Prefix: | sblk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The gross daily charter rate. + References No definition available. + Details
Name: | sblk_GrossDailyCharterRate
Namespace Prefix: | sblk_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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