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Holly Energy Partners (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Customers
Jun. 30, 2013
Jun. 30, 2014
Variable Interest Entity [Line Items]      
Sale of Stock, Number of Shares Issued in Transaction   1,875,000  
Proceeds from Issuance of Common Stock   $ 73.4  
HEP [Member]
     
Variable Interest Entity [Line Items]      
Percentage of general partner interest     2.00%
Number of primary customers 2    
Percentage of revenue Holly Corp represents     84.00%
Percentage of ownership in variable interest entity     39.00%
Annual contract payment     $ 228.7
Sale of Stock, Number of Shares Issued in Transaction   1,875,000