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v2.4.1.9

SEGMENTS - Method of Overhead Allocation (Detail 2) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Jan. 31, 2015 | Oct. 31, 2014 | Jul. 31, 2014 | Apr. 30, 2014 | Jan. 31, 2014 | Oct. 31, 2013 | Jul. 31, 2013 | Apr. 30, 2013 | Jan. 31, 2015 | Jan. 31, 2014 | Jan. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 514,323 us-gaap_SalesRevenueGoodsNet | $ 812,330 us-gaap_SalesRevenueGoodsNet | $ 424,010 us-gaap_SalesRevenueGoodsNet | $ 366,192 us-gaap_SalesRevenueGoodsNet | $ 472,756 us-gaap_SalesRevenueGoodsNet | $ 668,702 us-gaap_SalesRevenueGoodsNet | $ 304,158 us-gaap_SalesRevenueGoodsNet | $ 272,615 us-gaap_SalesRevenueGoodsNet | $ 2,116,855 us-gaap_SalesRevenueGoodsNet | $ 1,718,231 us-gaap_SalesRevenueGoodsNet | $ 1,399,719 us-gaap_SalesRevenueGoodsNet
Long-Lived Assets | 247,852 us-gaap_NoncurrentAssets |  |  |  | 244,707 us-gaap_NoncurrentAssets |  |  |  | 247,852 us-gaap_NoncurrentAssets | 244,707 us-gaap_NoncurrentAssets | 201,188 us-gaap_NoncurrentAssets
United States |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 1,796,358 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = giii_UnitedStatesMember | 1,528,473 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = giii_UnitedStatesMember | 1,333,885 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = giii_UnitedStatesMember
Long-Lived Assets | 132,822 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = giii_UnitedStatesMember |  |  |  | 106,638 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = giii_UnitedStatesMember |  |  |  | 132,822 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = giii_UnitedStatesMember | 106,638 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = giii_UnitedStatesMember | 81,606 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = giii_UnitedStatesMember
Non-United States |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 320,497 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = giii_OtherGeographicRegionMember | 189,758 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = giii_OtherGeographicRegionMember | 65,834 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = giii_OtherGeographicRegionMember
Long-Lived Assets | $ 115,030 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = giii_OtherGeographicRegionMember |  |  |  | $ 138,069 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = giii_OtherGeographicRegionMember |  |  |  | $ 115,030 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = giii_OtherGeographicRegionMember | $ 138,069 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = giii_OtherGeographicRegionMember | $ 119,582 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = giii_OtherGeographicRegionMember

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- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(a)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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