Debt (Narrative) (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
	Apr. 29, 2016	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Debt Instrument [Line Items]
Maximum borrowing capacity under revolving credit agreement		$ 1,000,000			$ 1,000,000
Letters of Credit Outstanding, Amount		3,300			3,300
Proceeds from Long-term Lines of Credit					554,000	$ 254,100
Repayments of Lines of Credit					$ (315,000)
Line of Credit Facility, Expiration Date					Jul. 01, 2019
Proceeds from Lines of Credit					$ 315,000
Extinguishment of Debt, Amount			$ 30,800			155,200
Repayment of financing obligation		(39,500)			(39,500)
Loss on early extinguishment of debt		0	$ (8,700)	$ (1,368)	(8,718)	(1,368)
Payments of Debt Extinguishment Costs				5,200
Loss on Extinguishment of Debt Due to Unamortized Discount				3,800		3,788
Debt Instrument, Maturity Date			Apr. 01, 2026
Proceeds from Loans	$ 350,000
Capitalized Interest Costs, Including Allowance for Funds Used During Construction		3,500		$ 2,500	4,200	$ 5,400
6.5% Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Stated interest rate, senior notes			6.50%
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		$ 250,000	$ 250,000		250,000
Six Point Eight Seven Five Percentage Senior Notes Due Two Thousand Eighteen Member
Debt Instrument [Line Items]
Stated interest rate, senior notes				6.875%		6.875%
Senior notes				$ 150,000		$ 150,000
Six Percent Senior Notes Due Two Thousand Twenty Four [Member] [Member]
Debt Instrument [Line Items]
Stated interest rate, senior notes			6.00%
Plains [Member] | Lease [Member]
Debt Instrument [Line Items]
Proceeds from sale of storage assets					40,000
HEP [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity under revolving credit agreement			$ 1,200,000				$ 850,000
Proceeds from Long-term Lines of Credit					239,000
Repayments of Lines of Credit					(165,000)
Line of Credit Facility, Expiration Date		Nov. 01, 2018
Borrowings outstanding under revolving credit agreement		$ 786,000			786,000		712,000
Repayment of financing obligation			$ (39,500)		(39,500)	$ 0
HEP [Member] | 6.5% Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
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
HEP [Member] | Six Percent Senior Notes Due Two Thousand Twenty Four [Member] [Member]
Debt Instrument [Line Items]
Senior notes		$ 400,000			$ 400,000