Document and Entity Information - shares
9 Months Ended
Oct. 31, 2019
Dec. 03, 2019
Document and Entity Information [Abstract]    
Entity Registrant Name CONNS INC  
Entity Central Index Key 0001223389  
Current Fiscal Year End Date --01-31  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Document Type 10-Q  
Document Period End Date Oct. 31, 2019  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   28,697,445