| Document and Entity Information | Jul. 30, 2021 |
| Cover [Abstract] | |
| Entity Registrant Name | CONNS INC |
| Amendment Flag | false |
| Entity Central Index Key | 0001223389 |
| Document Type | 8-K |
| Document Period End Date | Jul. 30, 2021 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-34956 |
| Entity Tax Identification Number | 06-1672840 |
| Entity Address, Address Line One | 2445 Technology Forest Blvd. |
| Entity Address, Address Line Two | Suite 800 |
| Entity Address, City or Town | The Woodlands |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 77381 |
| City Area Code | (936) |
| Local Phone Number | 230-5899 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common stock, par value $0.01 per share |
| Trading Symbol | CONN |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
