XML 189 R65.htm IDEA: XBRL DOCUMENT
v3.19.1

Long - Term Debt - Credit Facilities 4 (Details) $ in Thousands | 11 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 15, 2018 USD ($) Vessel | Dec. 31, 2018 USD ($) Vessel
Number of vessels owned | Vessel | 19 | 38
Outstanding amount |  | $ 889,176
$38.5 Million Blue Ocean Credit Facility [Member] |  |
Number of vessels owned | Vessel |  | 3
Line of credit facility issuance date |  | Oct. 03, 2018
Line of credit facility maximum borrowing capacity |  | $ 38,500
Outstanding amount | $ 38,500 | $ 38,500
Line of Credit Facility, Expiration Date |  | Oct. 03, 2023
Line of Credit Facility, Number of Repayment Instalments |  | 1
Line of Credit Facility, Frequency of Payments |  | quarterly
Debt Instrument, Interest Rate, Stated Percentage |  | 10.00%
$180.5 Million Deutsche, CIT, Entrust Credit Facility [Member] |  |
Number of vessels owned | Vessel |  | 3
Line of credit facility issuance date |  | Nov. 09, 2018
Line of credit facility maximum borrowing capacity |  | $ 180,500
Outstanding amount | $ 180,500 |
Line of Credit Facility, Expiration Date |  | Jun. 30, 2022
Senior Facility [Member] |  |
Outstanding amount |  | $ 141,900
Line of Credit Facility, Expiration Date |  | Jun. 30, 2022
Number of loan tranches |  | 3
Line of Credit Facility, Frequency of Payments |  | quarterly
Line of Credit Facility, Interest Rate Description |  | LIBOR
Loan margin percentage |  | 3.00%
Debt Service Coverage Ratio (DSCR) |  | 110.00%
Senior Facility [Member] | Tranche A [Member] |  |
Line of Credit Facility, Periodic Payment |  | $ 868
Line of Credit Facility, Number of Repayment Instalments |  | 14
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid |  | $ 35,148
Senior Facility [Member] | Tranche B [Member] |  |
Line of Credit Facility, Periodic Payment |  | $ 863
Line of Credit Facility, Number of Repayment Instalments |  | 14
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid |  | $ 35,218
Senior Facility [Member] | Tranche C [Member] |  |
Line of Credit Facility, Periodic Payment |  | $ 858
Line of Credit Facility, Number of Repayment Instalments |  | 14
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid |  | $ 35,288
Junior Facility [Member] |  |
Outstanding amount |  | $ 38,600
Line of Credit Facility, Expiration Date |  | Jun. 30, 2022
Number of loan tranches |  | 3
Line of Credit Facility, Frequency of Payments |  | quarterly
Line of Credit Facility, Interest Rate Description |  | LIBOR
Loan margin percentage |  | 10.00%
Debt Service Coverage Ratio (DSCR) |  | 110.00%
Junior Facility [Member] | Tranche A [Member] |  |
Line of Credit Facility, Periodic Payment |  | $ 236
Line of Credit Facility, Number of Repayment Instalments |  | 14
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid |  | $ 9,563
Junior Facility [Member] | Tranche B [Member] |  |
Line of Credit Facility, Periodic Payment |  | $ 235
Line of Credit Facility, Number of Repayment Instalments |  | 14
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid |  | $ 9,577
Junior Facility [Member] | Tranche C [Member] |  |
Line of Credit Facility, Periodic Payment |  | $ 233
Line of Credit Facility, Number of Repayment Instalments |  | 14
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid |  | $ 9,604

X
- Definition Ratio of cash flow to cash flow debt service. + References No definition available. + Details
Name: | gsl_DebtServiceCoverageRatio
Namespace Prefix: | gsl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of repayment instalments 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

X
- Definition The number of tranches under the credit facility. + References No definition available. + Details
Name: | gsl_NumberLoanTranches
Namespace Prefix: | gsl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of vessels owned. + References No definition available. + Details
Name: | gsl_NumberOfVesselsOwned
Namespace Prefix: | gsl_
Data Type: | xbrli:positiveIntegerItemType
Balance Type: | na
Period Type: | duration

X
- 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: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: 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=6879938&loc=d3e572229-122910 Reference 3: 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 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(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- 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

X
- Definition Date the credit facility terminates, in CCYY-MM-DD format. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of the frequency of periodic payments, which may be presented in a variety of ways (for example, monthly, quarterly, annually). + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityFrequencyOfPayments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date the credit facility first became available, in CCYY-MM-DD format. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityInitiationDate1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions). + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityInterestRateDescription
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the required periodic payments of both interest and principal. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityPeriodicPayment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_LineOfCreditFacilityAxis=gsl_BlueOceanCreditFacility38.5Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LineOfCreditFacilityAxis=gsl_DeutscheCITEntrustCreditFacility180.5MillionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LineOfCreditFacilityAxis=gsl_SeniorFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=gsl_TrancheAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=gsl_TrancheBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=gsl_TrancheCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LineOfCreditFacilityAxis=gsl_JuniorFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |