| Document and Entity Information | Feb. 04, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Amendment Description | Following the initial filing of the Current Report on Form 8-K, the Registrant discovered that the EDGAR filer inadvertently checked the wrong exhibit type tag in the submission (exhibit type 95, rather than exhibit type 99). This Amendment No. 1 to the Current Report on Form 8-K is being filed to include the correct exhibit type tag. No disclosure was changed as a result of this error . |
| Document Period End Date | Feb. 4, 2021 |
| Entity Registrant Name | ENOVA INTERNATIONAL, INC. |
| Entity Central Index Key | 0001529864 |
| Entity Emerging Growth Company | false |
| Entity File Number | 1-35503 |
| Entity Incorporation State Country Code | DE |
| Entity Tax Identification Number | 45-3190813 |
| Entity Address, Address Line One | 175 West Jackson Boulevard |
| Entity Address, City or Town | Chicago |
| Entity Address, State or Province | IL |
| Entity Address, Postal Zip Code | 60604 |
| City Area Code | (312) |
| Local Phone Number | 568-4200 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common stock, par value $0.00001 per share |
| Trading Symbol | ENVA |
| Security Exchange Name | NYSE |
