Reconciliation of Consideration Paid and Estimated Fair Value of Assets Acquired (Parenthetical) (Detail)	Mar. 31, 2015	Feb. 28, 2015	Feb. 28, 2014	Jan. 31, 2014	Dec. 31, 2009
Iconix Latin America
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired			50.00%
Iconix Europe
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired				1.00%	50.00%
Non-controlling interest				49.00%
Iconix China
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	50.00%
Pony International, LLC.
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		75.00%
Non-controlling interest		25.00%