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Document and Entity Information (USD $)
 12 Months Ended
Jan. 31, 2015
Mar. 25, 2015
Jul. 31, 2014
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Jan. 31, 2015    
Document Fiscal Year Focus 2015    
Document Fiscal Period Focus FY    
Trading Symbol URBN    
Entity Registrant Name URBAN OUTFITTERS INC    
Entity Central Index Key 0000912615    
Current Fiscal Year End Date --01-31    
Entity Well-known Seasoned Issuer Yes    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Large Accelerated Filer    
Entity Common Stock, Shares Outstanding   131,723,233dei_EntityCommonStockSharesOutstanding  
Entity Public Float     $ 3,614,766,155dei_EntityPublicFloat