Debt (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jan. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Debt Instrument [Line Items]
Maximum borrowing capacity under revolving credit agreement		$ 1,350,000		$ 1,350,000
Line of Credit Facility, Expiration Date				Feb. 01, 2022
Letters of Credit Outstanding, Amount		2,400		$ 2,400
Loss on early extinguishment of debt		0	$ 0	0	$ (12,225)
Redemption Premium	$ 9,800
Proceeds from Long-term Lines of Credit				305,500	505,000
Capitalized Interest Costs		$ 1,000	$ 600	$ 1,900	$ 3,200
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
Debt Instrument, Maturity Date				Apr. 01, 2026
6.5% Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate, senior notes	6.50%
HEP
Debt Instrument [Line Items]
Maximum borrowing capacity under revolving credit agreement		$ 1,400,000		$ 1,400,000
Line of Credit Facility, Expiration Date		Jul. 01, 2022
Line of Credit Facility, Capacity Available for Trade Purchases		$ 50,000		50,000
Line of credit facility, accordion feature		300,000		300,000
Proceeds from Lines of Credit				305,500
Repayments of Lines of Credit				(417,500)
Borrowings outstanding under revolving credit agreement		900,000		$ 900,000		1,012,000
Debt Instrument, Maturity Date				Aug. 01, 2024
Proceeds from Long-term Lines of Credit				$ 500,000
HEP | 6.5% Senior Notes [Member]
Debt Instrument [Line Items]
Senior notes	$ 300,000
Senior Notes Aggregate Redemption Amount	$ 309,800
HEP | Six Percent Senior Notes Due Two Thousand Twenty Four [Member] [Member]
Debt Instrument [Line Items]
Senior notes		$ 500,000		$ 500,000		$ 500,000