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Fair Value Measurements - Consolidated Statement of Operations (Table) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Fair Value Measurements [Abstract] |  |  |
Gains/(losses) from freight derivatives | $ 0 sblk_GainLossOnFreightDerivatives | $ 0 sblk_GainLossOnFreightDerivatives | $ 41 sblk_GainLossOnFreightDerivatives
Unrealized gains/(losses) from the Credit Agricole Swaps and the HSH Swaps before hedging designation (August 31, 2014) | (799)us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments | 91 us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments | 0 us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments
Ineffective portion of cash flow hedges following hedging designation | 0 us-gaap_GainLossOnInterestRateCashFlowHedgeIneffectiveness | 0 us-gaap_GainLossOnInterestRateCashFlowHedgeIneffectiveness | 0 us-gaap_GainLossOnInterestRateCashFlowHedgeIneffectiveness
Total Gains/(Losses) on derivative instruments, net | (799)us-gaap_GainLossOnDerivativeInstrumentsNetPretax | 91 us-gaap_GainLossOnDerivativeInstrumentsNetPretax | 41 us-gaap_GainLossOnDerivativeInstrumentsNetPretax
Interest and finance costs |  |  |
Reclassification adjustments of interest rate swap loss transferred to Interest and finance costs from Other comprehensive loss | (1,055)us-gaap_InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet | 0 us-gaap_InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet | 0 us-gaap_InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet
Total Gains/(Losses) recognized | $ (1,854)sblk_GainLossOnDerivativeInstrumentsAggregateNetEffectInEarnings | $ 91 sblk_GainLossOnDerivativeInstrumentsAggregateNetEffectInEarnings | $ 41 sblk_GainLossOnDerivativeInstrumentsAggregateNetEffectInEarnings

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- Definition The aggregate net effect in earnings due to derivatives. + References No definition available. + Details
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- Definition Amount of gain (loss) included in earnings for the period from the increase (decrease) in fair value of freight derivatives. + References No definition available. + Details
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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959 + Details
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- Definition The net gain (loss) during the reporting period due to ineffectiveness in interest rate cash flow hedges. Recognized in earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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- Definition Amount of gain (loss) included in earnings for the period from the increase (decrease) in fair value of interest rate derivatives not designated as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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- Definition The amount of net gains or losses on interest rate cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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