Document and Entity Information - shares
9 Months Ended
Oct. 31, 2018
Dec. 04, 2018
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Oct. 31, 2018  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Trading Symbol URBN  
Entity Registrant Name URBAN OUTFITTERS INC  
Entity Central Index Key 0000912615  
Current Fiscal Year End Date --01-31  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Common Stock, Shares Outstanding   107,642,283