| Document And Entity Information | Oct. 24, 2019 |
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Amendment Description | This Amendment No. 1 to the Current Report on Form 8-K (this “Amendment”) is being filed to amend Items 2.02 and 9.01 of the Current Report on Form 8-K filed on October 24, 2019 announcing Enova International, Inc.’s (the “Company”) financial results for the quarter ended September 30, 2019 solely for the purpose of correcting the narrative in the “Outlook” section and two corresponding tables provided in its press release dated October 24, 2019. This Amendment does not change the Company’s GAAP results. |
| Document Period End Date | Oct. 24, 2019 |
| Entity Registrant Name | ENOVA INTERNATIONAL, INC. |
| Entity Central Index Key | 0001529864 |
| Entity Emerging Growth Company | false |
| Entity File Number | 1-35503 |
| Entity Incorporation, State or 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 |
| Title of Each Class | Common stock, par value $0.00001 per share |
| Trading symbol(s) | ENVA |
| Name of Exchange of which registered | NYSE |
