XML 79 R64.htm IDEA: XBRL DOCUMENT
v3.8.0.1

EMPLOYEE BENEFIT PLANS (Detail Textuals) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jan. 31, 2018 | Jan. 31, 2017 | Jan. 31, 2016
Defined Contribution Plan Disclosure [Line Items] |  |  |
Non-discretionary matching contribution | 100.00% |  |
Percentage of employee's compensation matched by employer | 3.00% |  |
Employer matching percentage of employee contributions | 50.00% |  |
Percentage of additional employee's compensation matched by employer | 2.00% |  |
DKI |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Defined contribution plan, matching contributions | $ 3.6 | $ 2.9 | $ 2.3

X
- Definition Represents defined contribution plan additional maximum annual contributions per employee percent. + References No definition available. + Details
Name: | giii_DefinedContributionPlanAdditionalMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix: | giii_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage Of Employer Contribution To Match Participant Contribution In Defined Contribution Plan + References No definition available. + Details
Name: | giii_PercentageOfEmployerContributionToMatchParticipantContributionInDefinedContributionPlan
Namespace Prefix: | giii_
Data Type: | num:percentItemType
Balance Type: | na
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_DefinedContributionPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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