XML 166 R42.htm IDEA: XBRL DOCUMENT
v3.19.1

Description of Business (Details) | 3 Months Ended | 11 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 25, 2019 | Nov. 15, 2018 Vessel | Dec. 31, 2018 USD ($) Vessel
Number of vessels Owned |  | 19 | 38
Weighted average age, weighted by TEU capacity |  |  | 11 years
Poseidon Transaction [Member] |  |  |
Number of vessels purchased |  | 20 |
Number of vessels Owned |  | 19 |
All Subsidiaries [Member] |  |  |
Ownership Interest |  |  | 100.00%
Argos [Member] | Poseidon Transaction [Member] |  |  |
Number of vessels to be sold |  | 1 |
Reverse Stock Split [Member] | Common Shares [Member] | Subsequent Event [Member] |  |  |
Shareholders' Equity, Reverse Stock Split | On March 25, 2019, the Company’s common shares began trading on a reverse-split-adjusted basis, following approval received from the Company’s shareholders at a Special Meeting held on March 20, 2019 and subsequently approval from the Company’s Board of Directors to reverse split the Company’s common shares at a ratio of one-for-eight. |  |
Shareholders' Equity Note, Reverse Stock Split, Conversion Ratio | 8 |  |
CMA CGM [Member] |  |  |
Duration of agreement |  |  | 5 years
Charter hire daily rate | $ |  |  | $ 25,910

X
- Definition The amount charged as daily charter hire. + References No definition available. + Details
Name: | gsl_CharterHireDailyRate
Namespace Prefix: | gsl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The term of the agreement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | gsl_DurationOfAgreements
Namespace Prefix: | gsl_
Data Type: | xbrli:durationItemType
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 The number of vessels purchased by the company. + References No definition available. + Details
Name: | gsl_NumberOfVesselsPurchased
Namespace Prefix: | gsl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of vessels that the company agreed to sell in the near future. + References No definition available. + Details
Name: | gsl_NumberOfVesselsToBeSold
Namespace Prefix: | gsl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The weighted average age weighted by TEU capacity. + References No definition available. + Details
Name: | gsl_WeightedAverageAgeCapacity
Namespace Prefix: | gsl_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB TOPIC 4.C) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770 + Details
Name: | us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of the reverse stock split arrangement. Also provide the retroactive effect given by the reverse split that occurs after the balance sheet date but before the release of financial statements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 4.C) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770 + Details
Name: | us-gaap_StockholdersEquityReverseStockSplit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions. + References No definition available. + Details
Name: | us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_NoncashOrPartNoncashAcquisitionsByUniqueDescriptionAxis=gsl_PoseidonTransactionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=gsl_AllSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=gsl_ArgosMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConversionOfStockByUniqueDescriptionAxis=gsl_ReverseStockSplitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=gsl_CMACGMMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |