Consolidated Financial Information (Parenthetical) (Detail) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended				12 Months Ended
		Feb. 28, 2014	Dec. 31, 2015	Mar. 31, 2015	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information [Line Items]
Non-cash pre-tax re-measurement gain							$ 49,990	$ 28,898
Gains on sale of trademarks	[1]							$ 6,399	$ 7,354
Iconix Latin America
Quarterly Financial Information [Line Items]
Non-cash pre-tax re-measurement gain		$ 34,748				$ 34,700
Trademarks | Sharper Image
Quarterly Financial Information [Line Items]
Gains on sale of trademarks					$ 6,400
Iconix China
Quarterly Financial Information [Line Items]
Non-cash pre-tax re-measurement gain				$ 50,000			$ 49,990
Men's
Quarterly Financial Information [Line Items]
Non-cash asset impairment charges			$ 437,500

[1] Gains on sale of trademarks was previously reported as other revenue. Many of the gains recorded upon formation of certain joint ventures were reversed as a result of consolidation. The gains that were not impacted by consolidation, and therefore not reversed, have been reclassified and are being presented as a separate line item above operating income.