Amount that has been refundable to the entity that represents the paid in advance.

No definition available.

Name:	gsl_AdvanceHire
Namespace Prefix:	gsl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Description of the scope of the credit facility arrangement.

+ References

No definition available.

+ Details

Name:	gsl_CreditFacilityDescriptionOfScope
Namespace Prefix:	gsl_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The fees incurred for repayments of debt.

+ References

No definition available.

+ Details

Name:	gsl_FeesOnRepaymentsOfDebt
Namespace Prefix:	gsl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Date the finance lease liability terminates, in MM-YY format.

+ References

No definition available.

+ Details

Name:	gsl_FinanceLeaseLiabilityMaturityDates
Namespace Prefix:	gsl_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the credit facility terminates, in YYYY-MM format.

+ References

No definition available.

+ Details

Name:	gsl_LineOfCreditFacilityExpirationDate
Namespace Prefix:	gsl_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	gsl_LineOfCreditFacilityInitiationDate3
Namespace Prefix:	gsl_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of repayment installments of a credit facility agreement.

+ References

No definition available.

+ Details

Name:	gsl_LineOfCreditFacilityNumberOfRepaymentInstalment
Namespace Prefix:	gsl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of repayment installments

+ References

No definition available.

+ Details

Name:	gsl_NumberOfRepaymentInstallment
Namespace Prefix:	gsl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of sale and leaseback agreements.

+ References

No definition available.

+ Details

Name:	gsl_NumberOfSaleAndLeasebackAgreements
Namespace Prefix:	gsl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	gsl_SaleLeasebackTransactionNetProceedsFinancingActivitiesI
Namespace Prefix:	gsl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of the quarterly rental payments due under the lease entered into in connection with the transactions involving the sale of property to another party and the lease of the property back to the seller.

+ References

No definition available.

+ Details

Name:	gsl_SaleLeasebackTransactionQuarterlyRentalPayments1
Namespace Prefix:	gsl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

+ Details

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

- Definition

Date the debt agreement requires the first payment to be made, in YYYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480848/942-470-50-3

+ Details

Name:	us-gaap_DebtInstrumentDateOfFirstRequiredPayment1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482900/835-30-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69C
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69C

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482925/835-30-45-2

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482949/835-30-55-8

+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

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

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph e
-SubTopic 470
-Topic 942
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480848/942-470-50-3

+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

+ Details

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

- Definition

Present value of lessee's discounted obligation for lease payments from finance lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479041/842-20-45-1

+ Details

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

- Definition

Amount of gain (loss) from the difference between the repurchase price of a debt instrument initially issued by the entity and the net carrying amount of the debt at the time of its repurchase.

+ References

No definition available.

+ Details

Name:	us-gaap_GainLossOnRepurchaseOfDebtInstrument
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

+ 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

Description of interest rate for borrowing under credit facility. Includes, but is not limited to, terms and method for determining interest rate.

+ References

+ Details

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

- 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

Fair value portion of notes payable.

+ References

+ Details

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

- Definition

The cash inflow from issuance of preferred stock that is classified as callable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Subparagraph (a)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-14

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfRedeemablePreferredStock
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://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-14

+ Details

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

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

+ References

No definition available.

+ Details

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

- Definition

Amount of cash outflow for short-term and long-term debt. Excludes payment of lease obligation.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 15
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-15

+ Details

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

- Definition

The date of the transaction involving the sale of the property to another party and the lease of the property back to the seller.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 840
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481295/840-40-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479741/842-40-50-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479741/842-40-50-1

+ Details

Name:	us-gaap_SaleLeasebackTransactionDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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

+ Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=gsl_EightPointZeroZeroPercentSeniorUnsecuredNotesDue2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

- Details

Name:	srt_StatementScenarioAxis=gsl_OnorafterDecember312021andpriortoDecember312022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=gsl_OnorafterDecember312022andpriortoDecember312023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=gsl_OnorafterDecember312023andpriortomaturityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=gsl_RedeemedNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	srt_StatementScenarioAxis=gsl_FirstTwelveQuarterlyInstallmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=gsl_NextTwelveQuarterlyInstallmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	srt_StatementScenarioAxis=gsl_EightInstalmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=gsl_TwentyInstalmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	srt_StatementScenarioAxis=gsl_FifteenInstalmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=gsl_FourInstalmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Long-Term Debt (Narrative III) (Details Narrative)	1 Months Ended	3 Months Ended		5 Months Ended	6 Months Ended		7 Months Ended		8 Months Ended	9 Months Ended		12 Months Ended
Long-Term Debt (Narrative III) (Details Narrative)	Jan. 19, 2021 USD ($)	Mar. 23, 2023 USD ($)	Apr. 05, 2022 USD ($)	May 31, 2021 USD ($)	Jun. 16, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jul. 31, 2023 USD ($)	Jul. 31, 2021 USD ($)	Aug. 26, 2021 USD ($)	Oct. 13, 2021 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	May 20, 2021 USD ($)	May 12, 2021 USD ($)	Nov. 27, 2019 USD ($)	Nov. 19, 2019 USD ($)
Sale Leaseback Transaction [Line Items]
Proceeds from Lines of Credit												$ 76,000,000	$ 60,000,000	$ 744,506,000
Line of Credit Facility, Interest Rate Description												1-month Compounded SOFR
Debt Instrument, Basis Spread on Variable Rate												0.64%
Repayments of Debt												$ (0)	$ 276,671,000	$ 152,862,000
8.00% Senior Unsecured Notes Due 2024 [Member]
Sale Leaseback Transaction [Line Items]
Debt Instrument, Face Amount																	$ 4,125,000	$ 27,500,000
Debt Instrument, Interest Rate, Stated Percentage												8.00%
Debt Instrument, Maturity Date												Dec. 31, 2024
Debt Instrument, Date of First Required Payment												Feb. 29, 2020
Notes Payable, Fair Value Disclosure			$ 89,020,000									$ 0
8.00% Senior Unsecured Notes Due 2024 [Member] \| Twelve Vessels [Member]
Sale Leaseback Transaction [Line Items]
Aggregate purchase price								$ 233,890,000
Net proceeds from issuance												$ 35,000,000
$236.2 Million Senior secured loan facility with Hayfin Management, LLP [Member]
Sale Leaseback Transaction [Line Items]
Description of Scope												The proceeds from the New Hayfin Credit Facility, along with cash on hand, were used to optionally redeem in full the outstanding 2022 Notes on January 20, 2021
Proceeds from Lines of Credit	$ 236,200,000
Line of Credit Facility, Frequency of Payments												quarterly
Line of Credit Facility, Interest Rate Description												LIBOR
Debt Instrument, Basis Spread on Variable Rate												7.00%
Issuance date of debt instrument												January 7, 2021
Maturity date												January 2026
Repayment installments												20
Line of Credit Facility, Periodic Payment												$ 6,560,000
Line of Credit Facility, Collateral												The New Hayfin Credit Facility was secured by, among other things, first priority ship mortgages over 21 of the Company’s vessels, assignments of earnings and insurances of the mortgaged vessels, pledges over certain bank accounts, as well as share pledges over the equity interests of each mortgaged vessel-owning subsidiary.
Repayments of Debt					$ 197,569,000	$ 5,831,000
Fees on repayments of debt					$ 11,229,000
Long-Term Debt, Gross												$ 0
$140.0 Million HBOC, CACIB, ESUN, CTBC, Taishin Credit Facility [Member]
Sale Leaseback Transaction [Line Items]
Description of Scope												to finance the acquisition of the Twelve Vessels
Proceeds from Lines of Credit							$ 140,000,000	$ 140,000,000
Line of Credit Facility, Interest Rate Description												SOFR
Debt Instrument, Basis Spread on Variable Rate												3.25%
Issuance date of debt instrument												July 6, 2021
Maturity date												July 2026
Repayments of Debt		$ 2,838,000
Long-Term Debt, Gross												$ 73,283,000
On or after December 31, 2021 and prior to December 31, 2022 [Member] \| 8.00% Senior Unsecured Notes Due 2024 [Member]
Sale Leaseback Transaction [Line Items]
Debt Instrument, Redemption Price, Percentage												102.00%
On or after December 31, 2022 and prior to December 31, 2023 [Member] \| 8.00% Senior Unsecured Notes Due 2024 [Member]
Sale Leaseback Transaction [Line Items]
Debt Instrument, Redemption Price, Percentage												101.00%
On or after December 31, 2023 and prior to maturity [Member] \| 8.00% Senior Unsecured Notes Due 2024 [Member]
Sale Leaseback Transaction [Line Items]
Debt Instrument, Redemption Price, Percentage												100.00%
Redeemed Notes [Member] \| 8.00% Senior Unsecured Notes Due 2024 [Member]
Sale Leaseback Transaction [Line Items]
Debt Instrument, Redemption Price, Percentage			102.00%
Debt Instrument, Repurchased Face Amount			$ 28,500,000
Loss of partial redemption amount												$ 2,350,000
$120.0 Million - Sale and Leaseback agreements - CMBFL Four Vessels [Member]
Sale Leaseback Transaction [Line Items]
Sale Leaseback Transaction, Date												August 26, 2021
Number of sale and leaseback agreements									4
Outstanding balance									$ 30,000,000			$ 64,438,000
Description of Scope												to finance the acquisition of the Four Vessels
Proceeds from Lines of Credit										$ 30,000,000	$ 90,000,000
Purchase Obligation												$ 7,000,000
Finance Lease Liability Maturity Date												three vessels mature in September 2027 and for the fourth vessel in October 2027
Line of Credit Facility, Interest Rate Description												SOFR
Debt Instrument, Basis Spread on Variable Rate												3.25%
$120.0 Million - Sale and Leaseback agreements - CMBFL Four Vessels [Member] \| First Twelve Quarterly Installments [Member]
Sale Leaseback Transaction [Line Items]
Line of Credit Facility, Number of Repayment Installments												12
Line of Credit Facility, Frequency of Payments												quarterly
Sale Leaseback Transaction, Quarterly Rental Payments												$ 1,587,500
$120.0 Million - Sale and Leaseback agreements - CMBFL Four Vessels [Member] \| Next Twelve Quarterly Installments [Member]
Sale Leaseback Transaction [Line Items]
Line of Credit Facility, Number of Repayment Installments												12
Line of Credit Facility, Frequency of Payments												quarterly
Sale Leaseback Transaction, Quarterly Rental Payments												$ 329,200
$54.0 Million Sale and Leaseback agreement - CMBFL [Member]
Sale Leaseback Transaction [Line Items]
Sale Leaseback Transaction, Date												May 20, 2021
Outstanding balance												$ 36,018,000			$ 54,000,000
Description of Scope												to refinance one of the three previous tranches of the $180,500 Deutsche, CIT, HCOB, Entrust, Blue Ocean Credit Facility, that had a maturity date on June 30, 2022, of an amount $46,624
Proceeds from Lines of Credit				$ 54,000,000
Purchase Obligation												$ 19,980,000
Finance Lease Liability Maturity Date												May 2028
Line of Credit Facility, Interest Rate Description												SOFR
Debt Instrument, Basis Spread on Variable Rate												3.25%
Aggregate purchase price				75,000,000
Advance hire				21,000,000
$54.0 Million Sale and Leaseback agreement - CMBFL [Member] \| Eight Installments [Member]
Sale Leaseback Transaction [Line Items]
Line of Credit Facility, Number of Repayment Installments												8
Line of Credit Facility, Frequency of Payments												quarterly
Sale Leaseback Transaction, Quarterly Rental Payments												$ 2,025,000
$54.0 Million Sale and Leaseback agreement - CMBFL [Member] \| Twenty Installments [Member]
Sale Leaseback Transaction [Line Items]
Line of Credit Facility, Number of Repayment Installments												20
Line of Credit Facility, Frequency of Payments												quarterly
Sale Leaseback Transaction, Quarterly Rental Payments												$ 891,000
$14.7 Million Sale and Leaseback agreement - Neptune Maritime Leasing [Member]
Sale Leaseback Transaction [Line Items]
Sale Leaseback Transaction, Date												May 12, 2021
Outstanding balance												$ 6,796,000				$ 14,735,000
Description of Scope												to finance the acquisition of GSL Violetta delivered in April 2021
Purchase Obligation												$ 950,000
Finance Lease Liability Maturity Date												February 2026
Line of Credit Facility, Interest Rate Description												SOFR
Debt Instrument, Basis Spread on Variable Rate												4.64%
Sale Leaseback Transaction, Net Proceeds, Financing Activities				$ 14,735,000
$14.7 Million Sale and Leaseback agreement - Neptune Maritime Leasing [Member] \| Fifteen Installments [Member]
Sale Leaseback Transaction [Line Items]
Line of Credit Facility, Number of Repayment Installments												15
Line of Credit Facility, Frequency of Payments												quarterly
Sale Leaseback Transaction, Quarterly Rental Payments												$ 793,870
$14.7 Million Sale and Leaseback agreement - Neptune Maritime Leasing [Member] \| Four Installments [Member]
Sale Leaseback Transaction [Line Items]
Line of Credit Facility, Number of Repayment Installments												4
Line of Credit Facility, Frequency of Payments												quarterly
Sale Leaseback Transaction, Quarterly Rental Payments												$ 469,120