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

The number of vessels financed by the debt instrument.

+ References

No definition available.

+ Details

Name:	sblk_NumberOfVesselFinancedByDebtInstrument
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

Amount of borrowing capacity currently available under the transaction involving the sale of property to another party and the lease of the property back to the seller.

+ References

No definition available.

+ Details

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

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228

+ Details

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

- Definition

The total gross amount less the charge for the use of the long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737

+ Details

Name:	us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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=75038535&loc=d3e64711-112823

+ Details

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

- Definition

A general description of the lessee's leasing arrangements including, but not limited to, the following: a) the basis on which contingent rental payments are determined; (b) the existence and terms of renewal or purchase options and escalation clauses; (c) restrictions imposed by lease agreements, such as those concerning dividends, additional debt, and further leasing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 10
-Section 15
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=108795181&loc=d3e32400-112679

Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
-Section 25
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=77904769&loc=SL2265659-115463

Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84164451&loc=d3e36991-112694

+ Details

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

- Definition

Date the entity disposed of a business or a group of assets, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_DisposalDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

+ References

+ Details

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

- 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=98513485&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=98513485&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=98513485&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=118932676&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

Per share or per unit amount of equity securities issued.

+ References

No definition available.

+ Details

Name:	us-gaap_SharesIssuedPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

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

- Details

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

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=sblk_ABN115000FacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=sblk_BNPFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=sblk_Citi130000FacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=sblk_HSBC80000FacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	sblk_LeaseContractualTermAxis=sblk_Step1VesselsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=sblk_KatieK1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=sblk_DebbieH1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=sblk_StarAyesha1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=sblk_StarJanni1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=sblk_StarMarianne1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	srt_CounterpartyNameAxis=sblk_CMBLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

Vessels and Other Fixed Assets, Net - 2019 (Details) $ / shares in Units, $ in Thousands		5 Months Ended	11 Months Ended	12 Months Ended
	Jan. 14, 2019 USD ($) $ / shares shares	May 27, 2019 USD ($) shares	Nov. 16, 2018 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jan. 07, 2019 $ / shares	Aug. 27, 2018
Property, Plant and Equipment [Line Items]
Cash portion of the consideration				$ 347,140	$ 328,634	$ 143,684
Capital leased assets, net amount				$ 798,863	992,777
Number of vessels owned				116
Loss / (gain) on sale of vessels				$ 5,493	0	(2,598)
Total acquisition cost				96,671	129,749
Impairment loss				$ 3,411	$ 17,784	$ 0
First-priority mortgage
Property, Plant and Equipment [Line Items]
Number of vessels owned				80
Amount of vessels pledged as collateral				$ 2,166,419
Cross collateral, Bareboat vessels
Property, Plant and Equipment [Line Items]
Capital leased assets, net amount				$ 798,863
ABN $115,000 Facility
Property, Plant and Equipment [Line Items]
Number of vessels financed				7
BNP Facility
Property, Plant and Equipment [Line Items]
Number of vessels financed				2
Citi $130,000 Facility
Property, Plant and Equipment [Line Items]
Number of vessels financed				11
HSBC $80,000 Facility
Property, Plant and Equipment [Line Items]
Number of vessels financed				8
Step 1 Vessels
Property, Plant and Equipment [Line Items]
Number of operating vessels acquired								3
Katie K
Property, Plant and Equipment [Line Items]
Delivery date				April 16, 2019
Debbie H
Property, Plant and Equipment [Line Items]
Delivery date				May 28, 2019
Star Ayesha
Property, Plant and Equipment [Line Items]
Delivery date				July 15, 2019
Star Janni
Property, Plant and Equipment [Line Items]
Delivery date				January 7, 2019
Star Marianne
Property, Plant and Equipment [Line Items]
Delivery date				January 14, 2019
Star Marianne and Star Janni \| Step 1 Vessels
Property, Plant and Equipment [Line Items]
Number of shares issued as part of the consideration \| shares	999,336
Cash portion of the consideration	$ 31,772
Total acquisition cost	$ 41,837
Star Janni \| Step 1 Vessels
Property, Plant and Equipment [Line Items]
Shares Issued, Price Per Share \| $ / shares							$ 10.41
Star Marianne \| Step 1 Vessels
Property, Plant and Equipment [Line Items]
Shares Issued, Price Per Share \| $ / shares	$ 9.66
Delphin Vessels
Property, Plant and Equipment [Line Items]
Number of operating vessels acquired		11
Number of shares issued as part of the consideration \| shares		4,503,370
Cash portion of the consideration		$ 80,000
Total acquisition cost		127,532
Delphin Vessels \| CMBL
Property, Plant and Equipment [Line Items]
Description of Capital leases, Term of contract				Bareboat charter for seven years
Sale leaseback transaction, Remaining borrowing capacity		$ 91,431
Star Kappa
Property, Plant and Equipment [Line Items]
Disposal date				Mar. 08, 2019
Star Aurora
Property, Plant and Equipment [Line Items]
Disposal date				Mar. 06, 2019
Star Anna
Property, Plant and Equipment [Line Items]
Delivery date				November 16, 2018
Total acquisition cost			$ 19,800
Disposal date				Sep. 23, 2019
Star Gamma
Property, Plant and Equipment [Line Items]
Disposal date				Sep. 05, 2019
Star Cosmo
Property, Plant and Equipment [Line Items]
Disposal date				Dec. 17, 2019
Star Epsilon
Property, Plant and Equipment [Line Items]
Disposal date				Dec. 09, 2019
Star Delta
Property, Plant and Equipment [Line Items]
Loss / (gain) on sale of vessels				$ 5,493
Star Gamma and Star Anna
Property, Plant and Equipment [Line Items]
Impairment loss				$ 3,411