Joint Ventures and Investments - Consolidated Joint Ventures (Detail)	3 Months Ended
	Mar. 31, 2018
Danskin China Limited
Schedule Of Investments [Line Items]
Date of Original Formation / Investment	2016-10
Company ownership interest	100.00%
Joint Venture Partner	Li-Ning (China) Sports Goods Co. Ltd.
Umbro China Limited | Put / Call Options
Schedule Of Investments [Line Items]
Date of Original Formation / Investment	2016-07	[1]
Company ownership interest	95.00%	[1]
Joint Venture Partner	Hong Kong MH Umbro International Co. Ltd.	[1]
US Pony Holdings, LLC
Schedule Of Investments [Line Items]
Date of Original Formation / Investment	2015-02
Company ownership interest	75.00%
Joint Venture Partner	Anthony L&S Athletics, LLC
Hardy Way, LLC
Schedule Of Investments [Line Items]
Date of Original Formation / Investment	2009-05
Company ownership interest	85.00%
Joint Venture Partner	Donald Edward Hardy
Variable Interest Entity, Primary Beneficiary | Iconix MENA Ltd | Put / Call Options
Schedule Of Investments [Line Items]
Date of Original Formation / Investment	2014-12	[1],[2]
Company ownership interest	55.00%	[1],[2]
Joint Venture Partner	Global Brands Group Asia Limited	[1],[2]
Variable Interest Entity, Primary Beneficiary | Iconix Israel, LLC
Schedule Of Investments [Line Items]
Date of Original Formation / Investment	2013-11	[2]
Iconix's Ownership %	50.00%	[2]
Joint Venture Partner	MGS	[2]
Variable Interest Entity, Primary Beneficiary | Iconix Europe LLC | Put / Call Options
Schedule Of Investments [Line Items]
Date of Original Formation / Investment	2009-12	[1],[2]
Company ownership interest	51.00%	[1],[2]
Joint Venture Partner	Global Brands Group Asia Limited	[1],[2]
Variable Interest Entity, Primary Beneficiary | Hydraulic IP Holdings LLC
Schedule Of Investments [Line Items]
Date of Original Formation / Investment	2014-12	[2]
Company ownership interest	51.00%	[2]
Joint Venture Partner	Top On International	[2]
Variable Interest Entity, Primary Beneficiary | Buffalo Brand Joint Venture
Schedule Of Investments [Line Items]
Date of Original Formation / Investment	2013-02	[2]
Company ownership interest	51.00%	[2]
Joint Venture Partner	Buffalo International	[2]
Variable Interest Entity, Primary Beneficiary | Diamond Icon
Schedule Of Investments [Line Items]
Date of Original Formation / Investment	2013-03	[2]
Company ownership interest	51.00%	[2]
Joint Venture Partner	Albion Agencies Ltd.	[2]
Variable Interest Entity, Primary Beneficiary | Icon Modern Amusement, LLC
Schedule Of Investments [Line Items]
Date of Original Formation / Investment	2012-12
Company ownership interest	51.00%
Joint Venture Partner	Dirty Bird Productions

[1] Refer to the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 for material terms of the put and call options associated with certain of the Company’s joint ventures.

[2] The Company determined, in accordance with ASC 810, based on the corporate structure, voting rights and contributions of the Company and its respective joint venture partner, the entity is a variable interest entity (VIE) and, as the Company has been determined to be the primary beneficiary, is subject to consolidation. The Company has consolidated this joint venture within its consolidated financial statements since inception. The liabilities of the VIE are not material and none of the VIE assets are encumbered by any obligation of the VIE or other entity.