Debt (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Mar. 31, 2014	Sep. 30, 2015	Sep. 30, 2014	Jun. 30, 2015	Apr. 28, 2015	Mar. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Capitalized Interest Costs, Including Allowance for Funds Used During Construction	$ 100	$ 2,900		$ 5,500	$ 9,000
Maximum borrowing capacity under revolving credit agreement	1,000,000			$ 1,000,000
Line of Credit Facility, Expiration Date				Jul. 01, 2019
Letters of Credit Outstanding, Amount	6,000			$ 6,000
Gains (Losses) on Extinguishment of Debt	$ 0	$ 0		$ (1,370)	(7,677)
Debt Instrument, Maturity Date	Nov. 01, 2018
6.875% Senior Notes Due 2018 [Member]
Debt Instrument [Line Items]
Stated interest rate, senior notes	6.875%			6.875%
Extinguishment of Debt, Amount	$ 155,200
Gains (Losses) on Extinguishment of Debt	(1,400)
Redemption Premium	5,200
Amortization of Financing Costs and Discounts	(3,800)
Senior notes						$ 150,000			$ 150,000
Plains [Member] | Lease [Member]
Debt Instrument [Line Items]
Proceeds from sale of storage assets				$ 40,000
Term of lease, years				15 years
HEP [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity under revolving credit agreement	$ 850,000			$ 850,000			$ 850,000	$ 650,000
Line of Credit Facility, Expiration Date	Nov. 01, 2018
Borrowings outstanding under revolving credit agreement	$ 654,000			$ 654,000					571,000
HEP [Member] | 8.25% Senior Notes Due 2018 [Member]
Debt Instrument [Line Items]
Stated interest rate, senior notes			8.25%
Extinguishment of Debt, Amount			$ 156,200
Gains (Losses) on Extinguishment of Debt					$ (7,677)
Redemption Premium			6,200
Amortization of Financing Costs and Discounts			1,500
Debt Instrument, Maturity Date				Mar. 01, 2018
Debt Instrument, Face Amount			$ 150,000
HEP [Member] | 6.5% Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Stated interest rate, senior notes	6.50%			6.50%
Senior notes	$ 300,000			$ 300,000					$ 300,000
Debt Instrument, Maturity Date				Mar. 01, 2020
HEP [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity under revolving credit agreement	$ 50,000			$ 50,000