Restatement - Adjustments to Previously Reported Unaudited Condensed Consolidated Balance Sheets (Parenthetical) (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($)
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Final purchase price allocation included in the adjustment amounts of goodwill	$ 54.5
Final purchase price allocation included in the adjustment amounts of trademarks and other intangibles, net	(50.8)
Final purchase price allocation included in the adjustment amounts of investments and joint ventures	(4.7)
Final purchase price allocation included in the adjustment amounts of other assets current	0.1
Final purchase price allocation included in the adjustment amounts of other comprehensive loss	$ 0.9
Iconix China
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Remaining interest buy-out	50.00%