Number of repayment installments of a credit facility agreement.

No definition available.

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

- Definition

The number of tranches under the credit facility.

+ References

No definition available.

+ Details

Name:	sblk_NumberOfLoanTranches
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

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

- Definition

Amount of payment greater than the preceding installment payments to be paid at final maturity date of debt.

+ References

No definition available.

+ Details

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

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Discussion of whether the borrowings under the credit facility are secured or unsecured and, if secured, a description of collateral (for example, accounts receivable less than 120 days old, finished goods inventory).

+ 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(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(b))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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(16))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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(19)(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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

- Definition

Description of the terms of a credit facility arrangement. Terms typically include interest rate, collateral required, guarantees required, repayment requirements, and restrictions on use of assets and activities of the entity.

+ References

+ Details

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

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the frequency of periodic payments, which may be presented in a variety of ways (for example, monthly, quarterly, annually).

+ References

+ Details

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

- Definition

Amount of increase (decrease) of the credit facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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

- Definition

Date the credit facility first became available, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInitiationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

Amount of the required periodic payments of both interest and principal.

+ References

+ Details

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

+ Details

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

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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

- Details

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

- Details

Name:	us-gaap_CreditFacilityAxis=sblk_Tranche1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=sblk_Tranche2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=sblk_FirstTwoTrancheMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=sblk_First10QuartersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=sblk_Remaining14QuartersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=sblk_Tranche3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=sblk_Tranche4Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=sblk_RemainingTwoTrancheMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

Name:	us-gaap_CreditFacilityAxis=sblk_ThreeTrancheMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=sblk_LastTrancheMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=sblk_ING10060FacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=sblk_ING47800FacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Long-term debt - Information Per Loan 1 (Details) $ in Thousands	1 Months Ended		2 Months Ended	3 Months Ended	4 Months Ended	5 Months Ended	7 Months Ended	9 Months Ended	10 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2020 USD ($)	Jan. 30, 2019 USD ($)	Mar. 01, 2019 USD ($)	Mar. 31, 2019 USD ($)	Apr. 30, 2019 USD ($)	May 31, 2019 USD ($)	Jul. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Oct. 31, 2018 USD ($)	Nov. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
SEB Facility
Debt Instrument [Line Items]
Initiation date											Jan. 28, 2019
Maximum borrowing capacity											$ 71,420
Number of loan tranches											4
Vessels provided as collateral											The SEB Facility is secured by a first priority mortgage on the vessels Star Laetitia and Star Sienna.
SEB Facility \| Tranche A
Debt Instrument [Line Items]
Amount drawn down		$ 32,825
Repayment period											6 years
Number of installments											24
Frequency of payments											quarterly
Balloon installment											$ 18,723
Expiration date											Jan. 31, 2025
SEB Facility \| Tranche B
Debt Instrument [Line Items]
Amount drawn down		$ 32,825
Repayment period											6 years
Number of installments											24
Frequency of payments											quarterly
Balloon installment											$ 18,723
Expiration date											Jan. 31, 2025
SEB Facility \| First Two Tranches
Debt Instrument [Line Items]
Line of credit facility, description											The first two tranches were used together with cash on hand to refinance the outstanding amounts under the lease agreements of the Star Laetitia and the Star Sienna.
SEB Facility \| First Two Tranches \| First 10 Quarters
Debt Instrument [Line Items]
Repayment installment											$ 677
SEB Facility \| First Two Tranches \| Remaining 14 Quarters
Debt Instrument [Line Items]
Repayment installment											524
SEB Facility \| Tranche C
Debt Instrument [Line Items]
Amount drawn down								$ 1,260
SEB Facility \| Tranche D
Debt Instrument [Line Items]
Maximum borrowing capacity											1,260
Remaining borrowing capacity											$ 1,260
SEB Facility \| Remaining Two Tranches
Debt Instrument [Line Items]
Number of installments											12
Frequency of payments											quarterly
Line of credit facility, description											The remaining two tranches were used to finance the acquisition and installation of scrubber equipment for the vessels Star Laetitia and Star Sienna.
E SUN Facility
Debt Instrument [Line Items]
Initiation date											Jan. 31, 2019
Maximum borrowing capacity											$ 37,100
Amount drawn down			$ 37,100
Number of installments											20
Frequency of payments											quarterly
Repayment installment											$ 618
Balloon installment											$ 24,733
Expiration date											Mar. 31, 2024
Vessels provided as collateral											The E SUN Facility is secured by a first priority mortgage on the Star Ariadne.
Line of credit facility, description											The E SUN Facility was used to refinance the outstanding amount under the lease agreement of the Star Ariadne.
Atradius Facility
Debt Instrument [Line Items]
Initiation date											Feb. 28, 2019
Maximum borrowing capacity											$ 36,645
Number of vessels financed for scrubber equipment and installation											42
Number of installments											10
Frequency of payments											semi-annual
Repayment installment											$ 3,664
Vessels provided as collateral											The Atradius Facility is secured by second-priority mortgage on 22 vessels of our fleet.
Line of credit facility, description											The Atradius Facility is to be used to finance the acquisition and installation of scrubber equipment for 42 vessels.
Atradius Facility \| Three Tranches
Debt Instrument [Line Items]
Amount drawn down											$ 33,311
Atradius Facility \| Last Tranche \| Subsequent Event
Debt Instrument [Line Items]
Amount drawn down	$ 3,331
ING $100,600 Facility
Debt Instrument [Line Items]
Initiation date											Mar. 28, 2019
Line of Credit Facility, Increase											$ 52,800
Number of loan tranches											4
Vessels provided as collateral											The ING $100,600 Facility is secured by a first priority mortgage on the vessels Peloreus, Leviathan, Star Magnanimus and Star Allessia.
ING $100,600 Facility \| Tranche A
Debt Instrument [Line Items]
Amount drawn down				$ 32,100
Repayment period											7 years
Number of installments											28
Frequency of payments											quarterly
Repayment installment											$ 535
Balloon installment											$ 17,120
ING $100,600 Facility \| Tranche B
Debt Instrument [Line Items]
Amount drawn down					$ 17,400
Repayment period											7 years
Number of installments											28
Frequency of payments											quarterly
Repayment installment											$ 311
Balloon installment											$ 8,700
ING $100,600 Facility \| First Two Tranches
Debt Instrument [Line Items]
Line of credit facility, description											The first two tranches were used to refinance the outstanding amounts under the lease agreements of the Star Magnanimus and the Star Alessia.
ING $100,600 Facility \| Tranche C
Debt Instrument [Line Items]
Amount drawn down						$ 1,400
Number of installments											16
Frequency of payments											quarterly
Repayment installment											$ 88
ING $100,600 Facility \| Tranche D
Debt Instrument [Line Items]
Amount drawn down										$ 1,400
Number of installments											16
Frequency of payments											quarterly
Repayment installment											$ 88
ING $100,600 Facility \| Remaining Two Tranches
Debt Instrument [Line Items]
Line of credit facility, description											The remaining two tranches were used to finance the acquisition and installation of scrubber equipment for the vessels Star Magnanimus and the Star Alessia.
ING $47,800 Facility
Debt Instrument [Line Items]
Maximum borrowing capacity											$ 47,800
ING $47,800 Facility \| Tranche A
Debt Instrument [Line Items]
Proceeds from issuance of debt									$ 22,500
Number of installments											28
Frequency of payments											quarterly
Repayment installment											$ 469
Balloon installment											$ 9,375
ING $47,800 Facility \| Tranche B
Debt Instrument [Line Items]
Proceeds from issuance of debt									$ 22,500
Number of installments											28
Frequency of payments											quarterly
Repayment installment											$ 469
Balloon installment											$ 9,375
ING $47,800 Facility \| First Two Tranches
Debt Instrument [Line Items]
Line of credit facility, description											The first two tranches of ING $47,800 Facility were used to refinance the outstanding amount of Deutsche Bank $85,000 Facility.
ING $47,800 Facility \| Tranche C
Debt Instrument [Line Items]
Amount drawn down							$ 1,400
Number of installments											16
Frequency of payments											quarterly
Repayment installment											$ 88
ING $47,800 Facility \| Tranche D
Debt Instrument [Line Items]
Amount drawn down							$ 1,400
Number of installments											16
Frequency of payments											quarterly
Repayment installment											$ 88
ING $47,800 Facility \| Remaining Two Tranches
Debt Instrument [Line Items]
Line of credit facility, description											The remaining two tranches of ING $47,800 Facility were used to finance the acquisition and installation of scrubber equipment for the vessels Peloreus and Leviathan.