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

Net increase or decrease in the carrying amount of the debt instrument for the period.

+ 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=120395691&loc=d3e23780-122690

+ Details

Name:	us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

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=120391452&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=120395691&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=120400017&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=120398452&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=120391452&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=120398452&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 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

+ 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 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=121586364&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=120395691&loc=d3e23780-122690

+ Details

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

- Definition

Amount of cash inflow before closing and debt issuance costs received by a seller-lessee in a sale-leaseback recognized in financing activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 55
-Paragraph 51
-URI http://asc.fasb.org/extlink&oid=121602674&loc=d3e51840-112757

Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 55
-Paragraph 50
-URI http://asc.fasb.org/extlink&oid=121602674&loc=d3e51831-112757

Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 55
-Paragraph 52
-URI http://asc.fasb.org/extlink&oid=121602674&loc=d3e51843-112757

+ Details

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

- Definition

A description of the terms of the lease(s) related to the assets being leased-back in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121586228&loc=d3e50796-112755

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 40
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121606570&loc=SL77919786-209982

+ Details

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

- Definition

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.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_SaleLeasebackTransactionDescriptionAxis=sblk_CMBLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
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_SaleLeasebackTransactionDescriptionAxis=sblk_JapaneseFinancialInstitutionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SaleLeasebackTransactionDescriptionAxis=sblk_ChineseFinancialInstitutionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SaleLeasebackTransactionDescriptionAxis=sblk_SPDBFinancialLeasingLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
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_Tranche3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=sblk_First4QuartersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=sblk_Remaining16QuartersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

Subsequent Events: (Details Narrative) Pure in Thousands	6 Months Ended					7 Months Ended		8 Months Ended	9 Months Ended		11 Months Ended
Subsequent Events: (Details Narrative) Pure in Thousands	Jul. 10, 2020 USD ($)	Jul. 06, 2020 USD ($)	Jul. 03, 2020 USD ($)	Jul. 02, 2020 USD ($)	Jul. 01, 2020 USD ($)	Jul. 31, 2020 USD ($)	Jul. 20, 2020 USD ($)	Aug. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Sep. 29, 2020 USD ($)	Nov. 30, 2020 USD ($)
Subsequent Event [Line Items]
Debt Instrument Increase For Period Net									$ 113,500
CMBL [Member] \| Forecast [Member]
Subsequent Event [Line Items]
Sale Leaseback Transaction Gross Proceeds Financing Activities											$ 8,000,000
Subsequent Event [Member] \| CMBL [Member]
Subsequent Event [Line Items]
Sale Leaseback Transaction Gross Proceeds Financing Activities								$ 82,764,000
Sale Leaseback Transaction Lease Terms								five years with a purchase option price at a significant lower level compared to the expected fair value of each vessel at the expiration
Subsequent Event [Member] \| Japanese Financial Institution [Member]
Subsequent Event [Line Items]
Sale Leaseback Transaction Gross Proceeds Financing Activities						$ 16,000,000
Sale Leaseback Transaction Lease Terms						seven years with a purchase obligation at the expiration
Subsequent Event [Member] \| Chinese Financial Institution [Member]
Subsequent Event [Line Items]
Sale Leaseback Transaction Gross Proceeds Financing Activities										$ 93,150,000
Sale Leaseback Transaction Lease Terms										10 years with a purchase obligation at the expiration
Subsequent Event [Member] \| SPDB Financial Leasing Co. Ltd [Member]
Subsequent Event [Line Items]
Sale Leaseback Transaction Gross Proceeds Financing Activities									$ 76,500,000
Sale Leaseback Transaction Lease Terms									eight years with a purchase obligation at the expiration
Subsequent Event [Member] \| ING 170,600 Facility [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Initiation Date					Jul. 01, 2020
Line of Credit Facility, Increase (Decrease), Net					$ 70,000,000
Proceeds From Lines Of Credit		$ 70,000,000
Number of Loan Tranches					6
Line of Credit Facility, Collateral					The ING $170,600 Facility is secured also by a first priority mortgage on the aforementioned additional vessels.
Subsequent Event [Member] \| ING 170,600 Facility [Member] \| Each Tranche [Member]
Subsequent Event [Line Items]
Repayment installment					24
Line of Credit Facility, Frequency of Payments					quarterly
Subsequent Event [Member] \| Alpha Bank 35,000 Facility [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Initiation Date				Jul. 02, 2020
Number of Loan Tranches				3
Line of Credit Facility, Collateral				The Alpha Bank 35,000 Facility is secured by first priority mortgages on the aforementioned vessels.
Line of Credit Facility, Maximum Borrowing Capacity				$ 35,000,000
Subsequent Event [Member] \| Alpha Bank 35,000 Facility [Member] \| Each Tranche [Member]
Subsequent Event [Line Items]
Repayment installment				20
Line of Credit Facility, Frequency of Payments				quarterly
Subsequent Event [Member] \| Alpha Bank 35,000 Facility [Member] \| Each Tranche [Member] \| Minimum [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Periodic Payment				$ 260,000
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid				3,800,000
Subsequent Event [Member] \| Alpha Bank 35,000 Facility [Member] \| Each Tranche [Member] \| Maximum [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Periodic Payment				425,000
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid				$ 6,500,000
Subsequent Event [Member] \| Alpha Bank 35,000 Facility [Member] \| Tranche A [Member]
Subsequent Event [Line Items]
Proceeds From Lines Of Credit		11,000,000
Subsequent Event [Member] \| Alpha Bank 35,000 Facility [Member] \| Tranche B [Member]
Subsequent Event [Line Items]
Proceeds From Lines Of Credit		9,000,000
Subsequent Event [Member] \| Alpha Bank 35,000 Facility [Member] \| Tranche C [Member]
Subsequent Event [Line Items]
Proceeds From Lines Of Credit						$ 15,000,000
Subsequent Event [Member] \| Piraeus Bank $50,350 Facility [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Initiation Date			Jul. 03, 2020
Proceeds From Lines Of Credit		$ 50,350,000
Repayment installment			20
Line of Credit Facility, Frequency of Payments			quarterly
Line of Credit Facility, Collateral			The Piraeus Bank $50,350 Facility is secured by first priority mortgages on the five aforementioned vessels.
Line of Credit Facility, Maximum Borrowing Capacity			$ 50,350,000
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid			25,150,000
Subsequent Event [Member] \| Piraeus Bank $50,350 Facility [Member] \| First 4 Quarters [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Periodic Payment			1,100,000
Subsequent Event [Member] \| Piraeus Bank $50,350 Facility [Member] \| Remaining 16 Quarters [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Periodic Payment			$ 1,300,000
Subsequent Event [Member] \| NTT $17,600 Facility [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Initiation Date	Jul. 10, 2020
Proceeds From Lines Of Credit							$ 17,600,000
Repayment installment	20
Line of Credit Facility, Frequency of Payments	quarterly
Line of Credit Facility, Collateral	The NTT $17,600 Facility is secured by first priority mortgage on the aforementioned vessel.
Line of Credit Facility, Periodic Payment	$ 476,000
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid	$ 8,086,000