The date of the vessel delivery to the Company.

No definition available.

Name:	SBLK_DeliveryDateVessel
Namespace Prefix:	SBLK_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of operating vessels acquired by the Company.

+ References

No definition available.

+ Details

Name:	SBLK_NumberOfOperatingVessels
Namespace Prefix:	SBLK_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of vessels owned by the Company.

+ References

No definition available.

+ Details

Name:	SBLK_NumberOfVesselsOwned
Namespace Prefix:	SBLK_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The vessel's capacity in deadweight tonnage.

+ References

No definition available.

+ Details

Name:	SBLK_VesselCapacity
Namespace Prefix:	SBLK_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of vessels acquired

+ References

No definition available.

+ Details

Name:	SBLK_VesselsAcquired
Namespace Prefix:	SBLK_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

+ References

+ Details

Name:	us-gaap_CommonStockSharesAuthorized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of assets pledged to secure a debt instrument.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentCollateralAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The number of shares issued as [noncash or part noncash] consideration for a business or asset acquired. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4332-108586

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4313-108586

+ Details

Name:	us-gaap_NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssued1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentAdditions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

- Definition

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(14))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(8))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 360
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124429447&loc=SL124453093-239630

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(13))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=SBLK_EnetiWarrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LeaseAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=SBLK_StarMarilenaStarBuenoAndStarBorneoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=SBLK_EnetiAcquisitionVesselsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=SBLK_StarBovariusStarSubaruStarCapoeiraStarCariocaStarLambadaAndStarMacarenaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=SBLK_StarAthenaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=SBLK_KamsarmaxVesselsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=SBLK_StarElizabethMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=SBLK_StarPavlinaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=SBLK_FirstPriorityMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=SBLK_SecondPriorityMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Vessels and other fixed assets, net (Details Narrative) $ / shares in Units, $ in Thousands	2 Months Ended	3 Months Ended	5 Months Ended	6 Months Ended		12 Months Ended
	Mar. 03, 2021 USD ($)	Mar. 16, 2021 shares	May 19, 2021 shares	Jun. 30, 2021 USD ($) shares	Jun. 30, 2020 USD ($)	Dec. 17, 2020 USD ($)	Feb. 02, 2021 $ / shares shares	Dec. 31, 2020 USD ($)
Property, Plant and Equipment [Line Items]
Number of vessels owned				128
Vessels and other fixed assets, net				$ 3,077,899				$ 2,877,119
Cash portion of the consideration				$ 116,434	$ 51,297
Eneti Warrant [Member]
Property, Plant and Equipment [Line Items]
Number of shares issued as part of the consideration \| shares				3,000,000
Common Stock, Shares Authorized \| shares							3,000,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights \| shares							3,000,000
Exercise price \| $ / shares							$ 0.01
Lease Agreements [Member]
Property, Plant and Equipment [Line Items]
Number of vessels owned				38
Vessels and other fixed assets, net				$ 871,933
Star Marilena, Star Bueno and Star Borneo [Member]
Property, Plant and Equipment [Line Items]
Number of operating vessels acquired						3
Delivery Date				January 26, 2021
Cash portion of the consideration						$ 39,000
Number of shares issued as part of the consideration \| shares				2,100,000
Eneti Acquisition Vessels [Member]
Property, Plant and Equipment [Line Items]
Number of operating vessels acquired							7
Star Bovarius, Star Subaru, Star Capoeira, Star Carioca, Star Lambada and Star Macarena [Member]
Property, Plant and Equipment [Line Items]
Delivery Date				March 16, 2021
Number of shares issued as part of the consideration \| shares		2,649,203
Star Athena [Member]
Property, Plant and Equipment [Line Items]
Delivery Date				May 19, 2021
Number of shares issued as part of the consideration \| shares			350,797
Kamsarmax Vessels [Member]
Property, Plant and Equipment [Line Items]
Number of vessels acquired	2
Vessel capacity	82,000
Purchase price	$ 55,000
Star Elizabeth [Member]
Property, Plant and Equipment [Line Items]
Delivery Date				May 25, 2021
Star Pavlina [Member]
Property, Plant and Equipment [Line Items]
Delivery Date				June 16, 2021
First-priority mortgage [Member]
Property, Plant and Equipment [Line Items]
Number of vessels owned				88
Debt Instrument, Collateral Amount				$ 2,150,769
Second-priority mortgage [Member]
Property, Plant and Equipment [Line Items]
Debt Instrument, Collateral Amount				$ 668,947