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Subsequent Events (Details) $ / shares in Units, $ in Thousands		1 Months Ended	5 Months Ended	9 Months Ended	12 Months Ended
	Jan. 14, 2015 $ / shares shares	Feb. 02, 2017 USD ($) $ / shares shares	May 18, 2015 $ / shares shares	Sep. 20, 2016 $ / shares shares	Dec. 31, 2016	Mar. 31, 2017 USD ($)	Aug. 19, 2014
Subsequent Events [Line Items]
Issuance of common stock, shares	9,800,084		11,250,000	11,976,745
Price per share | $ / shares	$ 25		$ 16	$ 4.3
Subsequent Event
Subsequent Events [Line Items]
Issuance of common stock, shares		6,310,272
Price per share | $ / shares		$ 8.154
Proceeds from issuance of private placement | $		$ 51,500
Subsequent Event | Oaktree and its affiliates
Subsequent Events [Line Items]
Issuance of common stock, shares		3,244,292
Star Virgo (ex HN 1371)
Subsequent Events [Line Items]
Date Delivered to Star Bulk					Mar-17
DWT					208,000
Kamsarmax vessels
Subsequent Events [Line Items]
Number of vessels acquired							14
Kamsarmax vessels | Subsequent Event
Subsequent Events [Line Items]
Number of vessels acquired						2
DWT						81,713
Agreement to acquire vessels, Future consideration | $						$ 30,300
Acquistition costs, Maximum percentage that will be financed by a financial institution						50.00%

X

- Definition

The maximum percentage of acquisition costs that will be financed by a financial institution.

+ References

No definition available.

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The aggregate total consideration to acquire vessels as defined in the relevant agreements.

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- Definition

The date of the vessel delivery to the Company.

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The vessel's capacity in deadweight tonnage.

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Number of vessels acquired.

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- Definition

The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

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-Publisher FASB
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Per share or per unit amount of equity securities issued.

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Number of new stock issued during the period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 210
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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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