Reconciliation of Consideration Paid and Estimated Fair Value of Assets Acquired (Parenthetical) (Detail)	Mar. 31, 2015	Feb. 28, 2015	Dec. 31, 2014	Feb. 28, 2014	Jan. 31, 2014	Feb. 28, 2013
Iconix Latin America
Business Acquisition [Line Items]
Controlling interest				50.00%
Iconix Europe
Business Acquisition [Line Items]
Controlling interest					50.00%
Non-controlling interest			49.00%
Buffalo Brand
Business Acquisition [Line Items]
Non-controlling interest						49.00%
Iconix China
Business Acquisition [Line Items]
Controlling interest	50.00%
Pony International, LLC.
Business Acquisition [Line Items]
Controlling interest		75.00%
Non-controlling interest		25.00%