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Debt (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Debt Instrument [Line Items]          
Maximum borrowing capacity under revolving credit agreement $ 1,350,000     $ 1,350,000  
Letters of Credit Outstanding, Amount 4,400     4,400  
Proceeds from Long-term Lines of Credit       175,000 $ 305,500
Repayments of Long-term Lines of Credit       156,500 417,500
Sale Leaseback Transaction, Net Proceeds, Financing Activities 34,800 $ 32,500      
Capitalized Interest Costs $ 500   $ 1,000 $ 1,100 $ 1,900
Five Point Eight Seven Five Percentage Senior Notes Due Two Thousand Twenty-Six [Member] [Member]          
Debt Instrument [Line Items]          
Stated interest rate, senior notes 5.875%     5.875%  
Senior notes $ 1,000,000 1,000,000   $ 1,000,000  
HEP          
Debt Instrument [Line Items]          
Maximum borrowing capacity under revolving credit agreement 1,400,000     1,400,000  
Line of Credit Facility, Capacity Available for Trade Purchases 50,000     50,000  
Line of credit facility, accordion feature 300,000     300,000  
Borrowings outstanding under revolving credit agreement 941,500 923,000   941,500  
HEP | Six Percent Senior Notes Due Two Thousand Twenty Four [Member] [Member]          
Debt Instrument [Line Items]          
Senior notes $ 500,000 $ 500,000   $ 500,000