| Document and Entity Information | Aug. 02, 2021 |
| Cover [Abstract] | |
| Entity Registrant Name | HOLLY ENERGY PARTNERS LP |
| Amendment Flag | false |
| Entity Central Index Key | 0001283140 |
| Document Type | 8-K |
| Document Period End Date | Aug. 2, 2021 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-03876 |
| Entity Tax Identification Number | 20-0833098 |
| Entity Address, Address Line One | 2828 N. Harwood |
| Entity Address, Address Line Two | Suite 1300 |
| Entity Address, City or Town | Dallas |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 75201-1507 |
| City Area Code | (214) |
| Local Phone Number | 871-3555 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Limited Partner Units |
| Trading Symbol | HEP |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
