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v3.23.1

Subsequent Events (Details) - License Agreements | 1 Months Ended
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May 31, 2023
Subsequent Event [Line Items] |
Intangible assets, estimated useful lives | 20 years
Subsequent Event |
Subsequent Event [Line Items] |
Purchase option, minimum period of license agreement | 25 years
Subsequent Event | Minimum |
Subsequent Event [Line Items] |
Intangible assets, estimated useful lives | 5 years
Subsequent Event | Maximum |
Subsequent Event [Line Items] |
Intangible assets, estimated useful lives | 25 years

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- Definition Purchase option, minimum period of license agreement + References No definition available. + Details
Name: | giii_PurchaseOptionMinimumPeriodOfLicenseAgreement
Namespace Prefix: | giii_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- 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

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- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_LicensingAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |