Trademarks and Other Intangibles, net - Additional Information (Detail) - USD ($)	1 Months Ended		3 Months Ended
	Mar. 31, 2015	Feb. 28, 2015	Mar. 31, 2015	Mar. 31, 2014
Intangible Assets by Major Class [Line Items]
Amortization expense for intangible assets			$ 902,000	$ 1,495,000
Impairment of intangible assets, indefinite-lived			0	0
Impairment of intangible assets, finite-lived			$ 0	$ 0
Strawberry Shortcake | Trademarks
Intangible Assets by Major Class [Line Items]
Increase in value of indefinite-lived intangible assets	$ 91,800,000
Iconix China
Intangible Assets by Major Class [Line Items]
Controlling interest	50.00%		50.00%
Interest acquired, including previously acquired interest	100.00%		100.00%
Iconix China | Trademarks
Intangible Assets by Major Class [Line Items]
Increase in value of indefinite-lived intangible assets	$ 40,500,000
Pony International, LLC.
Intangible Assets by Major Class [Line Items]
Non-controlling interest		25.00%
Pony International, LLC. | Trademarks
Intangible Assets by Major Class [Line Items]
Increase in value of indefinite-lived intangible assets		$ 46,800,000