Estimated Fair Value of Assets Acquired (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		1 Months Ended		1 Months Ended			1 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Feb. 28, 2014 Iconix Latin America	Feb. 28, 2014 Iconix Latin America Licensing agreements	Feb. 28, 2013 Buffalo Brand	Feb. 28, 2013 Buffalo Brand Licensing agreements	Feb. 28, 2013 Buffalo Brand Non-compete agreements	Jan. 31, 2014 Iconix Europe
Business Acquisition [Line Items]
Fair value of 49% non-controlling interest to sellers			$ 42,698		$ 59,489			$ 13,800
Less: note receivable owed to the Company			(1,695)
Add: accrued distributions due to New Brands			997
Cash paid to New Brands			42,000		76,500
Fair value of 50% interest in Iconix Latin America			42,698		59,489			13,800
Value of initial equity investment prior to 2014 Buy-out			4,805					13,800
Gain on re-measurement of initial equity investment	37,893		37,893
Fair value of business			85,396		135,989			27,600
Trademarks			82,400		142,600			27,000
Finite intangible assets				700		2,400	940
Cash			1,842					677
Net working deficit, excluding cash			(676)					(77)
Goodwill	232,091	230,976	1,130		4,060
Deferred tax liability					(14,011)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net, Total			$ 85,396		$ 135,989			$ 27,600