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Debt (Carrying Amounts Of Long-Term Debt) (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Jan. 31, 2017
Debt Instrument [Line Items]      
Unamortized discount     $ (2,400)
Total long-term debt $ 2,387,759 $ 2,498,993  
Long-term debt 2,387,759 2,498,993  
Five Point Eight Seven Five Percentage Senior Notes Due Two Thousand Twenty-Six [Member] [Member]      
Debt Instrument [Line Items]      
Principal 1,000,000 1,000,000  
Unamortized discount (7,840) (8,315)  
Total long-term debt 992,160 991,685  
HEP      
Debt Instrument [Line Items]      
HEP Credit Agreement 900,000 1,012,000  
Total long-term debt 1,395,599 1,507,308  
Long-term Debt and Capital Lease Obligations 1,395,599 1,507,308  
HEP | Six Percent Senior Notes Due Two Thousand Twenty Four [Member] [Member]      
Debt Instrument [Line Items]      
Principal 500,000 500,000  
Unamortized discount (4,401) (4,692)  
Total long-term debt 495,599 495,308  
Level 2 [Member]      
Debt Instrument [Line Items]      
Financial Liabilities Fair Value Disclosure 11,880 12,375  
Level 2 [Member] | Senior Notes [Member]      
Debt Instrument [Line Items]      
Financial Liabilities Fair Value Disclosure 1,074,390 1,113,470  
Level 2 [Member] | Senior Notes [Member] | HEP      
Debt Instrument [Line Items]      
Financial Liabilities Fair Value Disclosure $ 507,025 $ 525,120