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COMMITMENTS AND CONTINGENCIES - Textuals (Details) $ in Millions, $ in Millions |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 14, 2018 CAD ($) | Mar. 14, 2018 USD ($) | Oct. 27, 2017 | Jan. 31, 2020 CAD ($) | Jan. 31, 2020 USD ($) | Jan. 31, 2019 USD ($) | Jan. 31, 2018 USD ($)
Commitment And Contingencies [Line Items] |  |  |  |  |  |  |
Advertising expense |  |  |  |  | $ 94.7 | $ 87.8 | $ 105.6
CBSA |  |  |  |  |  |  |
Commitment And Contingencies [Line Items] |  |  |  |  |  |  |
Reassessment period to additional duties |  |  | 90 days |  |  |  |
Licenses |  |  |  |  |  |  |
Commitment And Contingencies [Line Items] |  |  |  |  |  |  |
Royalty expense |  |  |  |  | 178.8 | 165.7 | 154.3
Advertising expense |  |  |  |  | 48.3 | $ 46.2 | $ 43.4
G-III Apparel Canada ULC |  |  |  |  |  |  |
Commitment And Contingencies [Line Items] |  |  |  |  |  |  |
Value of bond issued for prepayments of additional duties | $ 26.9 | $ 20.9 |  |  |  |  |
Deferred expenses |  |  |  | $ 12.8 | $ 9.7 |  |

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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