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Debt (Carrying Amounts Of Long-Term Debt) (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Jan. 31, 2017
Dec. 31, 2016
Debt Instrument [Line Items]      
Unamortized discount   $ (2,400)  
Total long-term debt $ 2,236,514   $ 2,235,137
Long-term debt 2,236,514   2,235,137
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 (8,552)   (8,775)
Total long-term debt 991,448   991,225
HEP [Member]      
Debt Instrument [Line Items]      
HEP Credit Agreement 750,000   553,000
Total long-term debt 1,245,066   1,243,912
Long-term Debt and Capital Lease Obligations 1,245,066   1,243,912
HEP [Member] | Six Percent Senior Notes Due Two Thousand Twenty Four [Member] [Member]      
Debt Instrument [Line Items]      
Principal 500,000   400,000
Unamortized discount (4,934)   (6,607)
Total long-term debt 495,066   393,393
HEP [Member] | 6.5% Senior Notes Due 2020 [Member]      
Debt Instrument [Line Items]      
Principal 0   300,000
Unamortized discount 0   (2,481)
Total long-term debt 0   297,519
Level 2 [Member]      
Debt Instrument [Line Items]      
Financial Liabilities Fair Value Disclosure 36,598   38,921
Level 2 [Member] | Forward Contracts [Member]      
Debt Instrument [Line Items]      
Financial Liabilities Fair Value Disclosure 1,091,470   1,022,500
Level 2 [Member] | Forward Contracts [Member] | HEP [Member]      
Debt Instrument [Line Items]      
Financial Liabilities Fair Value Disclosure $ 524,390   $ 723,750