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Financial Instruments (Estimated Fair Values Of Debt Instruments) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Debt Instrument [Line Items]    
Commodity price swaps $ 1,670  
Derivative liabilities 65,375 41,258
Carrying Amount
    
Debt Instrument [Line Items]    
Total financial assets 770,114 653,085
Total financial liabilities 688,416 971,902
Fair Value
    
Debt Instrument [Line Items]    
Total financial assets 770,114 653,085
Total financial liabilities 721,732 1,048,090
Level 1 | Fair Value
    
Debt Instrument [Line Items]    
Total financial assets 0 0
Total financial liabilities 3,569 5,563
Level 2 | Fair Value
    
Debt Instrument [Line Items]    
Total financial assets 763,142 641,853
Total financial liabilities 675,873 997,637
Level 3 | Fair Value
    
Debt Instrument [Line Items]    
Total financial assets 6,972 11,232
Total financial liabilities 42,290 44,890
Marketable securities | Carrying Amount
    
Debt Instrument [Line Items]    
Financial securities 725,160 635,702
Marketable securities | Fair Value
    
Debt Instrument [Line Items]    
Financial securities 725,160 635,702
Marketable securities | Level 1 | Fair Value
    
Debt Instrument [Line Items]    
Financial securities 0 0
Marketable securities | Level 2 | Fair Value
    
Debt Instrument [Line Items]    
Financial securities 725,160 635,702
Marketable securities | Level 3 | Fair Value
    
Debt Instrument [Line Items]    
Financial securities 0 0
NYMEX futures contracts | Carrying Amount
    
Debt Instrument [Line Items]    
Derivative liabilities 3,569 5,563
NYMEX futures contracts | Fair Value
    
Debt Instrument [Line Items]    
Derivative liabilities 3,569 5,563
NYMEX futures contracts | Level 1 | Fair Value
    
Debt Instrument [Line Items]    
Derivative liabilities 3,569 5,563
NYMEX futures contracts | Level 2 | Fair Value
    
Debt Instrument [Line Items]    
Derivative liabilities 0 0
NYMEX futures contracts | Level 3 | Fair Value
    
Debt Instrument [Line Items]    
Derivative liabilities 0 0
Commodity price swaps | Carrying Amount
    
Debt Instrument [Line Items]    
Commodity price swaps 43,284 17,383
Derivative liabilities 83,349 83,982
Commodity price swaps | Fair Value
    
Debt Instrument [Line Items]    
Commodity price swaps 43,284 17,383
Derivative liabilities 83,349 83,982
Commodity price swaps | Level 1 | Fair Value
    
Debt Instrument [Line Items]    
Commodity price swaps 0 0
Derivative liabilities 0 0
Commodity price swaps | Level 2 | Fair Value
    
Debt Instrument [Line Items]    
Commodity price swaps 36,312 6,151
Derivative liabilities 41,059 39,092
Commodity price swaps | Level 3 | Fair Value
    
Debt Instrument [Line Items]    
Commodity price swaps 6,972 11,232
Derivative liabilities 42,290 44,890
Senior notes | Carrying Amount | Holly Frontier
    
Debt Instrument [Line Items]    
Senior notes 155,054 435,254
Senior notes | Carrying Amount | HEP
    
Debt Instrument [Line Items]    
Senior notes 444,630 443,673
Senior notes | Fair Value | Holly Frontier
    
Debt Instrument [Line Items]    
Senior notes 161,250 470,990
Senior notes | Fair Value | HEP
    
Debt Instrument [Line Items]    
Senior notes 471,750 484,125
Senior notes | Level 1 | Fair Value | Holly Frontier
    
Debt Instrument [Line Items]    
Senior notes 0 0
Senior notes | Level 1 | Fair Value | HEP
    
Debt Instrument [Line Items]    
Senior notes 0 0
Senior notes | Level 2 | Fair Value | Holly Frontier
    
Debt Instrument [Line Items]    
Senior notes 161,250 470,990
Senior notes | Level 2 | Fair Value | HEP
    
Debt Instrument [Line Items]    
Senior notes 471,750 484,125
Senior notes | Level 3 | Fair Value | Holly Frontier
    
Debt Instrument [Line Items]    
Senior notes 0 0
Senior notes | Level 3 | Fair Value | HEP
    
Debt Instrument [Line Items]    
Senior notes 0 0
Interest rate swap | Carrying Amount | HEP
    
Debt Instrument [Line Items]    
Commodity price swaps 1,670  
Derivative liabilities 1,814 3,430
Interest rate swap | Fair Value | HEP
    
Debt Instrument [Line Items]    
Commodity price swaps 1,670  
Derivative liabilities 1,814 3,430
Interest rate swap | Level 1 | Fair Value | HEP
    
Debt Instrument [Line Items]    
Commodity price swaps 0  
Derivative liabilities 0 0
Interest rate swap | Level 2 | Fair Value | HEP
    
Debt Instrument [Line Items]    
Commodity price swaps 1,670  
Derivative liabilities 1,814 3,430
Interest rate swap | Level 3 | Fair Value | HEP
    
Debt Instrument [Line Items]    
Commodity price swaps 0  
Derivative liabilities $ 0 $ 0