Restatement - Adjustments to Previously Reported Unaudited Condensed Consolidated Balance Sheets (Parenthetical) (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2015 USD ($)
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Final purchase price allocation included in the adjustment amounts of goodwill	$ 52.5
Final purchase price allocation included in the adjustment amounts of trademarks and other intangibles, net	(52.7)
Final purchase price allocation included in the adjustment amounts of investments and joint ventures	(3.2)
Final purchase price allocation included in the adjustment amounts of other assets current	$ 3.4
Iconix China
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Remaining interest buy-out	50.00%