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Commitments and Contingencies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
1 Months Ended 3 Months Ended
Apr. 30, 2011
Feb. 28, 2011
Dec. 10, 2010
Apr. 30, 2011
Guez Defendants
       
Loss Contingencies [Line Items]        
Judgment amount of combined liability to the Company     $ 50  
Rate of interest on judgment amount     10.00%  
Litigation settlement, gross gain     26.0  
Litigation Settlement, Expense     10.3  
Litigation settlement, gross gain secured by Sureties     16.7  
Proceeds from legal settlements 3.7 13.0   16.7
Iconix Brand Group, Inc
       
Loss Contingencies [Line Items]        
Proceeds from legal settlements $ 27.7