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Basis of Presentation and General Information - Charter Revenue Percentage (Table) (Details)	12 Months Ended
	Dec. 31, 2020
Charterer A [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	11.00%

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

No definition available.

+ Details

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Namespace Prefix:	sblk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ConcentrationRiskLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_MajorCustomersAxis=sblk_Charterer1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: