Subsequent Events - Additional Information (Detail) - USD ($) $ in Millions			1 Months Ended
		Aug. 02, 2017	Jul. 31, 2017	Jun. 30, 2017	Dec. 31, 2016	Jul. 31, 2016	Jun. 30, 2016	Mar. 18, 2013	May 23, 2011
Complex Media
Subsequent Event [Line Items]
Escrow Deposit						$ 3.7
NGX, LLC
Subsequent Event [Line Items]
Company ownership interest	[1]			51.00%
Subsequent Event | Complex Media
Subsequent Event [Line Items]
Cash received from escrow			$ 2.7
Escrow Deposit			3.7
Cash remaining in escrow deposit			$ 1.0
Subsequent Event | NGX, LLC
Subsequent Event [Line Items]
Percentage of sale of ownership interest			51.00%
Sale of ownership interest			$ 2.4
Company ownership interest			0.00%
Subsequent Event | Iconix Canada Joint Venture
Subsequent Event [Line Items]
Percentage of purchase of ownership interest			50.00%
Purchase of ownership interest			$ 19.0
Percentage of net asset value			50.00%
Estimated payments to acquire ownership interest			$ 2.0
Payments to acquire ownership interest			9.0
Remaining payments to acquire ownership interest			$ 10.0
Percentage of estimated net asset value paid			50.00%
Senior Secured Notes
Subsequent Event [Line Items]
Principal amount of long term debt				$ 685.4	$ 751.8
Senior Secured Notes | Subsequent Event
Subsequent Event [Line Items]
Mandatory principal prepayments amount			$ 152.2
Senior Secured Term Loan Due 2022 | Subsequent Event | Deutsche Bank AG
Subsequent Event [Line Items]
Terms of credit agreement		5 years
Principal amount of long term debt		$ 300.0
Margin applied to LIBOR		7.00%
Debt instrument, variable rate basis		LIBOR
Convertible Notes | 1.50% Senior Subordinated Notes Due March 15, 2018
Subsequent Event [Line Items]
Principal amount of long term debt				$ 295.1				$ 400.0	$ 300.0
Debt instrument, interest rate, stated percentage				1.50%	1.50%		1.50%	1.50%	2.50%

[1] 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.