v3.10.0.1
Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Jan. 31, 2018
Mar. 27, 2018
Jul. 31, 2017
Document and Entity Information [Abstract]      
Entity Registrant Name CONNS INC    
Entity Central Index Key 0001223389    
Current Fiscal Year End Date --01-31    
Entity Current Reporting Status Yes    
Entity Public Float     $ 489.7
Entity Common Stock, Shares Outstanding   31,553,334  
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Document Type 8-K    
Amendment Flag false    
Document Period End Date Jan. 31, 2018