Debt (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Jan. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Jul. 27, 2017
Debt Instrument [Line Items]
Maximum borrowing capacity under revolving credit agreement		$ 1,350,000
Line of Credit Facility, Expiration Date		Feb. 01, 2022
Letters of Credit Outstanding, Amount		$ 2,300
Loss on early extinguishment of debt		0	$ (12,225)
Redemption Premium	$ 9,800
Proceeds from Long-term Lines of Credit		227,000	406,000
Capitalized Interest Costs		$ 900	$ 2,600
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%
Senior notes		$ 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
Line of Credit Facility, Expiration Date		Jul. 01, 2022
Line of Credit Facility, Capacity Available for Trade Purchases					50,000
Line of credit facility, accordion feature					$ 300,000
Proceeds from Lines of Credit		$ 227,000
Repayments of Lines of Credit		(343,500)
Borrowings outstanding under revolving credit agreement		$ 895,500		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