XML 192 R68.htm IDEA: XBRL DOCUMENT
v3.19.1

Long - Term Debt - Deferred Financing Costs (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Debt Instrument [Line Items] |  |  |
Fees and related costs deferred | $ 307 | $ 13,177 |
Debt Issuance Costs, Net | 9,299 | $ 12,818 | $ 7,100
Hayfin Credit Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Fees and related costs deferred | 307 |  |
Debt Issuance Costs, Net | $ 2,055 |  |

X
- Definition Additional deferred financing costs. + References No definition available. + Details
Name: | gsl_AdditionalDeferredFinancingCosts
Namespace Prefix: | gsl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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

X
- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + 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 210.5-02.17) -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 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 + Details
Name: | us-gaap_DeferredFinanceCostsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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