Basis of Presentation	9 Months Ended
Oct. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation	Note 1 – Basis of Presentation As used in these financial statements, the term “Company” or “G-III” refers to G-III Apparel Group, Ltd. and its subsidiaries. The Company designs, sources and markets an extensive range of apparel, including outerwear, dresses, sportswear, swimwear, women’s suits and women’s performance wear, as well as women’s handbags, footwear, small leather goods, cold weather accessories and luggage. The Company also operates retail stores and licenses several of its proprietary brands under various product categories. The Company consolidates the accounts of all its wholly-owned subsidiaries. KL North America BV (“KLNA”) and Fabco Holding B.V. (“Fabco”) are Dutch limited liability companies that are joint ventures 49% owned by the Company. Karl Lagerfeld Holding B.V. (“KLH”) is a Dutch limited liability company that is 19% owned by the Company. These investments are accounted for using the equity method of accounting. All material intercompany balances and transactions have been eliminated. Vilebrequin International SA (“Vilebrequin”), a Swiss corporation that is wholly-owned by the Company, KLNA, Fabco and KLH report results on a calendar year basis rather than on the January 31 fiscal year basis used by the Company. Accordingly, the results of Vilebrequin, KLNA, Fabco and KLH are, and will be, included in our financial statements for the quarter ended or ending closest to G-III’s fiscal quarter. For example, with respect to our results for the nine-month period ended October 31, 2018, the results of Vilebrequin, KLNA, Fabco and KLH are included for the nine-month period ended September 30, 2018. The Company’s retail operations segment uses a 52/53‑week fiscal year. The Company’s three and nine-month periods ended October 31, 2018 and 2017 were a 13‑week fiscal quarter and a 39‑week fiscal period, respectively, for both periods for the retail operations segment. For fiscal 2019 and 2018, the three and nine month periods for the retail operations segment ended on November 3, 2018 and October 28, 2017, respectively. The results for the three and nine-month periods ended October 31, 2018 are not necessarily indicative of the results expected for the entire fiscal year, given the seasonal nature of the Company’s business. The accompanying financial statements included herein are unaudited. All adjustments (consisting of only normal recurring adjustments) necessary for a fair presentation of the financial position, results of operations and cash flows for the interim period presented have been reflected. The accompanying financial statements should be read in conjunction with the financial statements and notes included in the Company’s Annual Report on Form 10‑K for the fiscal year ended January 31, 2018 filed with the Securities and Exchange Commission (the “SEC”). Assets and liabilities of the Company’s foreign operations, where the functional currency is not the U.S. Dollar (reporting currency), are translated from foreign currency into U.S. dollars at period-end rates, while income and expenses are translated at the weighted-average exchange rates for the period. The related translation adjustments are reflected as a foreign currency translation adjustment in accumulated other comprehensive income within stockholders’ equity. Certain reclassifications have been made to the Condensed Consolidated Statements of Income and Comprehensive Income as a result of the Company’s reclassifying the impact of certain components of foreign currency gain (loss) from cost of goods sold and interest expense to other income (loss).

Note 1 – Basis of Presentation

As used in these financial statements, the term “Company” or “G-III” refers to G-III Apparel Group, Ltd. and its subsidiaries. The Company designs, sources and markets an extensive range of apparel, including outerwear, dresses, sportswear, swimwear, women’s suits and women’s performance wear, as well as women’s handbags, footwear, small leather goods, cold weather accessories and luggage. The Company also operates retail stores and licenses several of its proprietary brands under various product categories.

The Company consolidates the accounts of all its wholly-owned subsidiaries. KL North America BV (“KLNA”) and Fabco Holding B.V. (“Fabco”) are Dutch limited liability companies that are joint ventures 49% owned by the Company. Karl Lagerfeld Holding B.V. (“KLH”) is a Dutch limited liability company that is 19% owned by the Company. These investments are accounted for using the equity method of accounting. All material intercompany balances and transactions have been eliminated. Vilebrequin International SA (“Vilebrequin”), a Swiss corporation that is wholly-owned by the Company, KLNA, Fabco and KLH report results on a calendar year basis rather than on the January 31 fiscal year basis used by the Company. Accordingly, the results of Vilebrequin, KLNA, Fabco and KLH are, and will be, included in our financial statements for the quarter ended or ending closest to G-III’s fiscal quarter. For example, with respect to our results for the nine-month period ended October 31, 2018, the results of Vilebrequin, KLNA, Fabco and KLH are included for the nine-month period ended September 30, 2018. The Company’s retail operations segment uses a 52/53‑week fiscal year. The Company’s three and nine-month periods ended October 31, 2018 and 2017 were a 13‑week fiscal quarter and a 39‑week fiscal period, respectively, for both periods for the retail operations segment. For fiscal 2019 and 2018, the three and nine month periods for the retail operations segment ended on November 3, 2018 and October 28, 2017, respectively.

The results for the three and nine-month periods ended October 31, 2018 are not necessarily indicative of the results expected for the entire fiscal year, given the seasonal nature of the Company’s business. The accompanying financial statements included herein are unaudited. All adjustments (consisting of only normal recurring adjustments) necessary for a fair presentation of the financial position, results of operations and cash flows for the interim period presented have been reflected.

The accompanying financial statements should be read in conjunction with the financial statements and notes included in the Company’s Annual Report on Form 10‑K for the fiscal year ended January 31, 2018 filed with the Securities and Exchange Commission (the “SEC”).

Assets and liabilities of the Company’s foreign operations, where the functional currency is not the U.S. Dollar (reporting currency), are translated from foreign currency into U.S. dollars at period-end rates, while income and expenses are translated at the weighted-average exchange rates for the period. The related translation adjustments are reflected as a foreign currency translation adjustment in accumulated other comprehensive income within stockholders’ equity.

Certain reclassifications have been made to the Condensed Consolidated Statements of Income and Comprehensive Income as a result of the Company’s reclassifying the impact of certain components of foreign currency gain (loss) from cost of goods sold and interest expense to other income (loss).