Holly Energy Partners (Details) (USD $) In Millions, except Share data, unless otherwise specified		3 Months Ended	6 Months Ended
	Jul. 12, 2012	Jun. 30, 2012 HEP [Member] Customers	Jun. 30, 2012 HEP [Member]	Jun. 30, 2012 Securities Pledged As Collateral [Member] HEP [Member]	Jun. 30, 2012 UNEV Pipeline [Member]
Variable Interest Entity [Line Items]
Equity Method Investment, Ownership Percentage					75.00%
Business Acquisition, cash paid					$ 260.0
Ownership Percentage by Parent, Controlling Interest	44.00%
Percentage of general partner interest			2.00%
Number of primary customers		2
Percentage of revenue Holly Corp represents		84.00%	84.00%
Percentage of ownership in variable interest entity			42.00%	21.00%
Common HEP units collateralized for crude oil				6,000,000
Annual contract payment			$ 200.3