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v3.22.1

Inventories - Textuals (Details) - USD ($) $ in Millions | Jan. 31, 2022 | Jan. 31, 2021
--- | --- | ---
Inventory [Line Items] |  |
Inventory held on consignment | $ 4.5 | $ 3.5
Prepaid Expenses and Other Current Assets |  |
Inventory [Line Items] |  |
Inventory return asset | $ 18.9 | $ 22.5

X
- Definition Represents inventory held on consignment on reporting date. + References No definition available. + Details
Name: | giii_InventoryHeldOnConsignment
Namespace Prefix: | giii_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the inventory return asset, which consists of the amount of goods that are anticipated to be returned by customers. + References No definition available. + Details
Name: | giii_InventoryReturnAsset
Namespace Prefix: | giii_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_InventoryLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |