Acquisitions, Joint Ventures and Investments - Recently Acquired Wholly Owned Subsidiaries (Parenthetical) (Detail)	Mar. 31, 2009	Sep. 30, 2008
Iconix China Holdings Limited
Schedule Of Investments [Line Items]
Ownership interest purchased		50.00%
Company ownership interest		100.00%
Scion, LLC
Schedule Of Investments [Line Items]
Ownership interest purchased	50.00%
Company ownership interest	100.00%