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

X

- Definition

The aggregate net effect in earnings due to derivatives.

+ References

No definition available.

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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

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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)

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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



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-Publisher FASB

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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

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