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Advances for vessels under construction and acquisition of vessels, Newbuildings (Details) - Jun. 30, 2015 $ in Thousands	USD ($)
Newbuilding Vessels
Vessels [Line Items]
Newbuildings periodic installments, next twelve months	$ 500,681
Newbuildings periodic installments, 2017	77,187
Total aggregate remaining contracted price plus agreed additional amounts	$ 577,868
Number of contracts for Newbuildings acquired	25
Merger and Pappas Transaction
Vessels [Line Items]
Number of contracts for Newbuildings acquired	14

X

- Definition

The number of newbuildings contracts acquired.

+ References

No definition available.

+ Details

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Namespace Prefix:	sblk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The total amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation to be paid within and after one year from the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	sblk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- 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

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

X

- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the second rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: