| Document and Entity Information | Sep. 05, 2024 |
| Cover [Abstract] | |
| Entity Registrant Name | UNIVERSAL TECHNICAL INSTITUTE INC |
| Amendment Flag | false |
| Entity Central Index Key | 0001261654 |
| Document Type | 8-K |
| Document Period End Date | Sep. 05, 2024 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 1-31923 |
| Entity Tax Identification Number | 86-0226984 |
| Entity Address, Address Line One | 4225 E. Windrose Drive |
| Entity Address, Address Line Two | Suite 200 |
| Entity Address, City or Town | Phoenix |
| Entity Address, State or Province | AZ |
| Entity Address, Postal Zip Code | 85032 |
| City Area Code | (623) |
| Local Phone Number | 445-9500 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value $0.0001 per share |
| Trading Symbol | UTI |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
