Recent Adopted and Issued Accounting Pronouncements	6 Months Ended
Jul. 31, 2018
Accounting Changes And Error Corrections [Abstract]
Recent Adopted and Issued Accounting Pronouncements	Note 11 – Recent Adopted and Issued Accounting Pronouncements Recently Adopted Accounting Guidance In May 2017, the Financial Accounting Standards Board (“FASB”) issued ASU 2017-09, “Compensation — Stock Compensation (Topic 718): Scope of Modification Accounting.” ASU 2017-09 provides clarification as to when modification accounting should be used for changes to the terms or conditions of a share-based payment award. ASU 2017-09 does not change the accounting for modifications but clarifies that modification accounting guidance should only be applied if there is a change to the value, vesting conditions or award classification and would not be required if the changes are considered non-substantive. The amendments of ASU 2017-09 are effective for reporting periods beginning after December 15, 2017. The Company adopted the provisions of ASU 2017-09 during the first quarter of fiscal 2019. The adoption of ASU 2017-09 did not have any impact on the Company’s condensed consolidated financial statements. In December 2017, the SEC staff issued Staff Accounting Bulletin 118 (“SAB 118”) to provide guidance for companies that have not completed their accounting for the income tax effects of the Tax Cuts and Jobs Act (“TCJA”). Due to the complexities of the TCJA, the Company’s final tax liability may materially differ from provisional estimates due to additional guidance and regulations issued by the U.S. Treasury Department, the Internal Revenue Service ("IRS") and state and local tax authorities. G-III will finalize its accounting for the TCJA during the one-year measurement period, and any adjustments to the provisional amounts will be included in income tax expense or benefit in the appropriate periods, and disclosed if material, in accordance with guidance provided by SAB 118. As of July 31, 2018, the Company has not identified or recorded adjustments to the provisional amounts previously disclosed in its Annual Report on Form 10-K for the year ended January 31, 2018. In January 2017, the FASB issued ASU 2017-01, “Business Combinations (Topic 805): Clarifying the Definition of a Business.” The purpose of ASU 2017-01 is to clarify the definition of a business to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. ASU 2017-01 is effective for fiscal years beginning after December 15, 2017, including interim periods within that year. The amendments in ASU 2017-01 should be applied prospectively on or after the effective date. The Company adopted the provisions of ASU 2017-01 during the first quarter of fiscal 2019. The adoption of ASU 2017-01 did not have any impact on the Company’s condensed consolidated financial statements. In October 2016, the FASB issued ASU 2016-16, “Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory.” The update requires an entity to recognize the income tax consequences of an intra-entity transfer of an asset upon transfer other than inventory, eliminating the current recognition exception. Prior to the update, GAAP prohibited the recognition of current and deferred income taxes for intra-entity asset transfers until the asset was sold to an outside party. The amendments in this update do not include new disclosure requirements; however, existing disclosure requirements might be applicable when accounting for the current and deferred income taxes for an intra-entity transfer of an asset other than inventory. For public business entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those fiscal years. The Company adopted the provisions of ASU 2016-16 during the first quarter of fiscal 2019. The adoption of ASU 2016-16 did not have a material impact on the Company’s condensed consolidated financial statements. In August 2016, the FASB issued ASU 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments,” which clarifies guidance with respect to the classification of eight specific cash flow issues. ASU 2016-15 was issued to reduce diversity in practice and prevent financial statement restatements. Cash flow issues include: debt prepayment or debt extinguishment costs, settlement of zero-coupon bonds, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies and bank-owned life insurance policies, distributions received from equity method investees, beneficial interests in securitization transactions and separately identifiable cash flows and application of the predominance principle. ASU 2016-15 is effective for public business entities for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Under ASU 2016-15, entities must apply the guidance retrospectively to all periods presented but may apply it prospectively if retrospective application would be impracticable. The Company adopted the provisions of ASU 2016-15 during the first quarter of fiscal 2019. The adoption of ASU 2016-15 did not have a material impact on the Company’s condensed consolidated financial statements. In January 2016, the FASB issued ASU 2016-01, “Financial Instruments — Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.” This standard (i) modifies how entities measure equity investments and present changes in the fair value of financial liabilities, (ii) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment, (iii) changes presentation and disclosure requirements and (iv) clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity’s other deferred tax assets. ASU 2016-01 is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The Company adopted the provisions of ASU 2016-15 during the first quarter of fiscal 2019. The adoption of ASU 2016-15 did not have a material impact on the Company’s condensed consolidated financial statements. In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606).” This update replaces the previous revenue recognition guidance in GAAP and requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The FASB clarified this guidance by issuing ASU 2017-13, “Amendments to SEC Paragraphs Pursuant to the Staff Announcement at the July 20, 2017 EITF Meeting and Rescission of Prior SEC Staff Announcements and Observer Comments”; ASU 2016-08, “Principal versus Agent Considerations (Reporting Revenue Gross versus Net)”; ASU 2016-10, “Identifying Performance Obligations and Licensing”; ASU 2016-12, “Narrow-Scope Improvements and Practical Expedients”; and ASU 2016-20, “Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers.” The amendments to ASU 2014-09 were intended to render more detailed implementation guidance with the expectation of reducing the degree of judgment necessary to comply with Topic 606. These new standards have the same effective date as ASU 2014-09 and were effective for public entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The Company adopted the provisions of ASU 2014-09, as subsequently amended, during the first quarter of fiscal 2019. The guidance permits two methods of adoption: retrospectively to each prior reporting period presented (full retrospective method), or retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (modified retrospective method). The Company adopted the pronouncement using a modified retrospective approach. The Company performed an analysis of its current revenue streams worldwide and identified changes that resulted from the adoption of the new guidance. The Company implemented changes to its accounting processes and controls to support the new revenue recognition and disclosure requirements. The adoption of Topic 606 primarily affects the wholesale operations segment in the timing of recognition of certain adjustments that were recorded in net sales. For example, the Company previously recorded markdowns and certain customer allowances when the liability was known or incurred. Please refer to Note 2 for further details with respect to the adoption of this guidance by the Company. Issued Accounting Guidance Being Evaluated for Adoption In June 2018, the FASB issued ASU 2018-07, “FASB Simplifies Guidance on Nonemployee Share-Based Payments”, which supersedes ASC 505-50 and expands the scope of ASC 718 to include all share-based payment arrangements related to the acquisition of goods and services from both nonemployees and employees. As a result, most of the guidance in ASC 718 associated with employee share-based payments, including most of its requirements related to classification and measurement, applies to nonemployee share-based payment arrangements. ASU 2018-07 is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption of ASU 2018-07 is permitted for all entities, but no earlier than the date on which an entity adopts ASC 606. The Company does not expect ASU 2018-07 to have an impact on its condensed consolidated financial statements. In February 2018, the FASB issued ASU 2018-03, “Technical Corrections and Improvements to Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities”, which makes technical corrections to certain aspects of ASU 2016-01 (on recognition of financial assets and financial liabilities), including the following: (i) equity securities without a readily determinable fair value — discontinuation, (ii) equity securities without a readily determinable fair value — adjustments, (iii) forward contracts and purchased options, (iv) presentation requirements for certain fair value option liabilities, (v) fair value option liabilities denominated in a foreign currency and (vi) transition guidance for equity securities without a readily determinable fair value. The amendments in ASU 2018-03 are effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years beginning after June 15, 2018. Public business entities with fiscal years beginning between December 15, 2017, and June 15, 2018, are not required to adopt the amendments until the interim period beginning after June 15, 2018. The Company will adopt the provisions of ASU 2018-03 for its quarter beginning August 1, 2018. The Company does not expect ASU 2018-03 to have an impact on its condensed consolidated financial statements. In February 2018, the FASB issued ASU 2018-02, “Income Statement — Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income”, which provides financial statement preparers with an option to reclassify stranded tax effects within accumulated other comprehensive income to retained earnings in each period in which the effect of the change in the U.S. federal corporate income tax rate (or portion thereof) in the TCJA is recorded. The amendments to ASU 2018-02 are effective for all entities for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption of ASU 2018-02 is permitted, including adoption in any interim period for the public business entities for reporting periods for which financial statements have not yet been issued. The amendments of ASU 2018-02 should be applied either in the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate income tax rate in the TCJA is recognized. The Company is currently assessing the impact that adopting ASU 2018-02 will have on its financial statements and footnote disclosures. In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842).” The primary difference between the current requirement under GAAP and ASU 2016-02 is the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases. The FASB has continued to clarify this guidance and most recently issued ASU 2017-13, “Amendments to SEC Paragraphs Pursuant to the Staff Announcement at the July 20, 2017 EITF Meeting and Rescission of Prior SEC Staff Announcements and Observer Comments.” ASU 2016-02 requires that a lessee recognize in the statement of financial position a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term (other than leases that meet the definition of a short-term lease). The liability will be equal to the present value of lease payments. The asset will be based on the liability, subject to adjustment, such as for initial direct costs. For income statement purposes, the FASB retained a dual model, requiring leases to be classified as either operating or finance. Operating leases will result in straight-line expense (similar to current operating leases) while finance leases will result in a front-loaded expense pattern (similar to current capital leases). Classification will be based on criteria that are for the most part similar to those applied in current lease accounting. ASU 2016-02 may be adopted using a modified retrospective transition, and provides for certain practical expedients. Transactions will require application of the new guidance at the beginning of the earliest comparative period presented. The guidance is effective for public entities for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The Company is currently assessing the impact of ASU 2016-02 on its consolidated financial statements. Given the Company’s significant number of leases, the Company expects this standard will result in a significant increase to its long-term assets and liabilities but does not expect it to have a material impact on its statements of operations. The Company is required to adopt the new standard in the first quarter of fiscal 2020 and does not expect to early adopt this new standard.

Note 11 – Recent Adopted and Issued Accounting Pronouncements

Recently Adopted Accounting Guidance

In May 2017, the Financial Accounting Standards Board (“FASB”) issued ASU 2017-09, “Compensation — Stock Compensation (Topic 718): Scope of Modification Accounting.” ASU 2017-09 provides clarification as to when modification accounting should be used for changes to the terms or conditions of a share-based payment award. ASU 2017-09 does not change the accounting for modifications but clarifies that modification accounting guidance should only be applied if there is a change to the value, vesting conditions or award classification and would not be required if the changes are considered non-substantive. The amendments of ASU 2017-09 are effective for reporting periods beginning after December 15, 2017. The Company adopted the provisions of ASU 2017-09 during the first quarter of fiscal 2019. The adoption of ASU 2017-09 did not have any impact on the Company’s condensed consolidated financial statements.

In December 2017, the SEC staff issued Staff Accounting Bulletin 118 (“SAB 118”) to provide guidance for companies that have not completed their accounting for the income tax effects of the Tax Cuts and Jobs Act (“TCJA”). Due to the complexities of the TCJA, the Company’s final tax liability may materially differ from provisional estimates due to additional guidance and regulations issued by the U.S. Treasury Department, the Internal Revenue Service ("IRS") and state and local tax authorities. G-III will finalize its accounting for the TCJA during the one-year measurement period, and any adjustments to the provisional amounts will be included in income tax expense or benefit in the appropriate periods, and disclosed if material, in accordance with guidance provided by SAB 118. As of July 31, 2018, the Company has not identified or recorded adjustments to the provisional amounts previously disclosed in its Annual Report on Form 10-K for the year ended January 31, 2018.

In January 2017, the FASB issued ASU 2017-01, “Business Combinations (Topic 805): Clarifying the Definition of a Business.” The purpose of ASU 2017-01 is to clarify the definition of a business to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. ASU 2017-01 is effective for fiscal years beginning after December 15, 2017, including interim periods within that year. The amendments in ASU 2017-01 should be applied prospectively on or after the effective date. The Company adopted the provisions of ASU 2017-01 during the first quarter of fiscal 2019. The adoption of ASU 2017-01 did not have any impact on the Company’s condensed consolidated financial statements.

In October 2016, the FASB issued ASU 2016-16, “Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory.” The update requires an entity to recognize the income tax consequences of an intra-entity transfer of an asset upon transfer other than inventory, eliminating the current recognition exception. Prior to the update, GAAP prohibited the recognition of current and deferred income taxes for intra-entity asset transfers until the asset was sold to an outside party. The amendments in this update do not include new disclosure requirements; however, existing disclosure requirements might be applicable when accounting for the current and deferred income taxes for an intra-entity transfer of an asset other than inventory. For public business entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those fiscal years. The Company adopted the provisions of ASU 2016-16 during the first quarter of fiscal 2019. The adoption of ASU 2016-16 did not have a material impact on the Company’s condensed consolidated financial statements.

In August 2016, the FASB issued ASU 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments,” which clarifies guidance with respect to the classification of eight specific cash flow issues. ASU 2016-15 was issued to reduce diversity in practice and prevent financial statement restatements. Cash flow issues include: debt prepayment or debt extinguishment costs, settlement of zero-coupon bonds, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies and bank-owned life insurance policies, distributions received from equity method investees, beneficial interests in securitization transactions and separately identifiable cash flows and application of the predominance principle. ASU 2016-15 is effective for public business entities for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Under ASU 2016-15, entities must apply the guidance retrospectively to all periods presented but may apply it prospectively if retrospective application would be impracticable. The Company adopted the provisions of ASU 2016-15 during the first quarter of fiscal 2019. The adoption of ASU 2016-15 did not have a material impact on the Company’s condensed consolidated financial statements.

In January 2016, the FASB issued ASU 2016-01, “Financial Instruments — Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.” This standard (i) modifies how entities measure equity investments and present changes in the fair value of financial liabilities, (ii) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment, (iii) changes presentation and disclosure requirements and (iv) clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity’s other deferred tax assets. ASU 2016-01 is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The Company adopted the provisions of ASU 2016-15 during the first quarter of fiscal 2019. The adoption of ASU 2016-15 did not have a material impact on the Company’s condensed consolidated financial statements.

In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606).” This update replaces the previous revenue recognition guidance in GAAP and requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The FASB clarified this guidance by issuing ASU 2017-13, “Amendments to SEC Paragraphs Pursuant to the Staff Announcement at the July 20, 2017 EITF Meeting and Rescission of Prior SEC Staff Announcements and Observer Comments”; ASU 2016-08, “Principal versus Agent Considerations (Reporting Revenue Gross versus Net)”; ASU 2016-10, “Identifying Performance Obligations and Licensing”; ASU 2016-12, “Narrow-Scope Improvements and Practical Expedients”; and ASU 2016-20, “Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers.” The amendments to ASU 2014-09 were intended to render more detailed implementation guidance with the expectation of reducing the degree of judgment necessary to comply with Topic 606. These new standards have the same effective date as ASU 2014-09 and were effective for public entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The Company adopted the provisions of ASU 2014-09, as subsequently amended, during the first quarter of fiscal 2019. The guidance permits two methods of adoption: retrospectively to each prior reporting period presented (full retrospective method), or retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (modified retrospective method). The Company adopted the pronouncement using a modified retrospective approach. The Company performed an analysis of its current revenue streams worldwide and identified changes that resulted from the adoption of the new guidance. The Company implemented changes to its accounting processes and controls to support the new revenue recognition and disclosure requirements. The adoption of Topic 606 primarily affects the wholesale operations segment in the timing of recognition of certain adjustments that were recorded in net sales. For example, the Company previously recorded markdowns and certain customer allowances when the liability was known or incurred. Please refer to Note 2 for further details with respect to the adoption of this guidance by the Company.

Issued Accounting Guidance Being Evaluated for Adoption

In June 2018, the FASB issued ASU 2018-07, “FASB Simplifies Guidance on Nonemployee Share-Based Payments”, which supersedes ASC 505-50 and expands the scope of ASC 718 to include all share-based payment arrangements related to the acquisition of goods and services from both nonemployees and employees. As a result, most of the guidance in ASC 718 associated with employee share-based payments, including most of its requirements related to classification and measurement, applies to nonemployee share-based payment arrangements. ASU 2018-07 is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption of ASU 2018-07 is permitted for all entities, but no earlier than the date on which an entity adopts ASC 606. The Company does not expect ASU 2018-07 to have an impact on its condensed consolidated financial statements.

In February 2018, the FASB issued ASU 2018-03, “Technical Corrections and Improvements to Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities”, which makes technical corrections to certain aspects of ASU 2016-01 (on recognition of financial assets and financial liabilities), including the following: (i) equity securities without a readily determinable fair value — discontinuation, (ii) equity securities without a readily determinable fair value — adjustments, (iii) forward contracts and purchased options, (iv) presentation requirements for certain fair value option liabilities, (v) fair value option liabilities denominated in a foreign currency and (vi) transition guidance for equity securities without a readily determinable fair value. The amendments in ASU 2018-03 are effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years beginning after June 15, 2018. Public business entities with fiscal years beginning between December 15, 2017, and June 15, 2018, are not required to adopt the amendments until the interim period beginning after June 15, 2018. The Company will adopt the provisions of ASU 2018-03 for its quarter beginning August 1, 2018. The Company does not expect ASU 2018-03 to have an impact on its condensed consolidated financial statements.

In February 2018, the FASB issued ASU 2018-02, “Income Statement — Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income”, which provides financial statement preparers with an option to reclassify stranded tax effects within accumulated other comprehensive income to retained earnings in each period in which the effect of the change in the U.S. federal corporate income tax rate (or portion thereof) in the TCJA is recorded. The amendments to ASU 2018-02 are effective for all entities for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption of ASU 2018-02 is permitted, including adoption in any interim period for the public business entities for reporting periods for which financial statements have not yet been issued. The amendments of ASU 2018-02 should be applied either in the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate income tax rate in the TCJA is recognized. The Company is currently assessing the impact that adopting ASU 2018-02 will have on its financial statements and footnote disclosures.

In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842).” The primary difference between the current requirement under GAAP and ASU 2016-02 is the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases. The FASB has continued to clarify this guidance and most recently issued ASU 2017-13, “Amendments to SEC Paragraphs Pursuant to the Staff Announcement at the July 20, 2017 EITF Meeting and Rescission of Prior SEC Staff Announcements and Observer Comments.” ASU 2016-02 requires that a lessee recognize in the statement of financial position a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term (other than leases that meet the definition of a short-term lease). The liability will be equal to the present value of lease payments. The asset will be based on the liability, subject to adjustment, such as for initial direct costs. For income statement purposes, the FASB retained a dual model, requiring leases to be classified as either operating or finance. Operating leases will result in straight-line expense (similar to current operating leases) while finance leases will result in a front-loaded expense pattern (similar to current capital leases). Classification will be based on criteria that are for the most part similar to those applied in current lease accounting. ASU 2016-02 may be adopted using a modified retrospective transition, and provides for certain practical expedients. Transactions will require application of the new guidance at the beginning of the earliest comparative period presented. The guidance is effective for public entities for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The Company is currently assessing the impact of ASU 2016-02 on its consolidated financial statements. Given the Company’s significant number of leases, the Company expects this standard will result in a significant increase to its long-term assets and liabilities but does not expect it to have a material impact on its statements of operations. The Company is required to adopt the new standard in the first quarter of fiscal 2020 and does not expect to early adopt this new standard.