XML 77 R45.htm IDEA: XBRL DOCUMENT
v3.7.0.1

ACQUISITIONS AND INTANGIBLES (Parentheticals) (Detail 3) - DKI $ in Millions | 12 Months Ended
--- | ---
Jan. 31, 2017 USD ($)
Business Acquisition [Line Items] |
Reversal of professional fees | $ 7.8
Reversal of severance expenses | $ 3.9

X
- Definition Represents Business Acquisition reversal of professional fee. + References No definition available. + Details
Name: | giii_BusinessAcquisitionReversalOfProfessionalFee
Namespace Prefix: | giii_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents Business Acquisition reversal of severance expenses. + References No definition available. + Details
Name: | giii_BusinessAcquisitionReversalOfSeveranceExpenses
Namespace Prefix: | giii_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=giii_DonnaKaranInternationalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |