Document Entity Information - USD ($)	3 Months Ended
	Mar. 31, 2018	Apr. 27, 2018	Jun. 30, 2017
Entity Information [Line Items]
Entity Registrant Name	HOLLY ENERGY PARTNERS LP
Entity Central Index Key	0001283140
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		105,421,124
Entity Public Float			$ 1,200,000,000