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Fair Value of Above/Below Market Acquired Time Charters and Gain/Loss on Time Charter Agreement Termination (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended | 2 Months Ended | 12 Months Ended | 27 Months Ended | 52 Months Ended | 36 Months Ended | 12 Months Ended | 56 Months Ended |  | 0 Months Ended | 1 Months Ended | 34 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Feb. 17, 2011 Star Cosmo | Dec. 31, 2011 Star Cosmo | Dec. 31, 2010 Star Cosmo | May 01, 2011 Star Cosmo | Nov. 30, 2015 Star Big | Aug. 31, 2014 Star Mega | Dec. 31, 2011 Star Sigma | 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 | Jan. 17, 2011 Star Omicron | Feb. 22, 2011 Star Omicron
Fair Value of Above/Below Market Acquired Time Charters and Gain/Loss on Time Charter Agreement Termination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of fair value of below market acquired time charters | $ 0 | $ 452 | $ 1,360 |  | $ 452 | $ 1,360 |  |  |  |  |  |  |  |  |  |
Write off of unamortized fair value of below market acquired time charter on vessel redelivery | 0 | 273 | 0 | 273 |  |  |  |  |  |  |  |  |  |  |  |
Gain on time charter agreement termination | 6,454 | 2,010 | 0 |  |  |  |  |  |  |  |  |  | 5,734 | 720 | 1,210 |
Metric tons of fuel oil |  |  |  |  |  |  |  |  |  |  |  | 1,027 |  |  |  |
Gross daily charter rate |  |  |  |  |  |  | 36 | 25 | 24 |  | 38 |  |  |  |  | 43
Redelivery date |  |  |  | Feb. 17, 2011 |  |  |  |  |  | Dec. 31, 2011 |  |  |  |  | Jan. 17, 2011 |
Write off of unamortized time charter termination deferred revenue |  |  |  | $ 324 |  |  |  |  |  | $ 203 |  |  |  |  |  |

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- Definition The amortization of the liability arising from the market value of the time charter assumed from a vessel acquisition. + References No definition available. + Details
Name: | sblk_AmortizationOfFairValueOfBelowMarketAcquiredTimeCharter
Namespace Prefix: | sblk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- 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

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- 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

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- 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

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- Definition The date the vessel was redelivered from the charterer. + References No definition available. + Details
Name: | sblk_VesselRedeliveryDate
Namespace Prefix: | sblk_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | instant

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- Definition The write off of unamortized fair value of below market acquired time charter on vessel's redelivery date. + References No definition available. + Details
Name: | sblk_WriteOffOfUnamortizedFairValueOfBelowMarketAcquiredTimeCharterOnVesselRedelivery
Namespace Prefix: | sblk_
Data Type: | xbrli:monetaryItemType
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- Definition The write off of unamortized time charter termination deferred revenue. + References No definition available. + Details
Name: | sblk_WriteOffOfUnamortizedTimeCharterTerminationDeferredRevenue
Namespace Prefix: | sblk_
Data Type: | xbrli:monetaryItemType
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Period Type: | duration

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- Details
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