Debt (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Debt Instrument [Line Items]
Maximum borrowing capacity under revolving credit agreement		$ 1,000,000
Proceeds from Bank Debt		315,000
Repayments of Debt		(315,000)
Letters of Credit Outstanding, Amount		3,300
Proceeds from Long-term Lines of Credit		$ 837,000	$ 153,500
Line of Credit Facility, Expiration Date		Jul. 01, 2019
Extinguishment of Debt, Amount		$ 39,500
Loss on early extinguishment of debt		$ (8,718)	0
Debt Instrument, Maturity Date		Apr. 01, 2026
Capitalized Interest Costs, Including Allowance for Funds Used During Construction		$ 700	2,900
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%
Senior notes		$ 250,000
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		522,000
Repayments of Lines of Credit		$ (469,000)
Line of Credit Facility, Expiration Date		Nov. 01, 2018
Borrowings outstanding under revolving credit agreement		$ 765,000		712,000
Extinguishment of Debt, Amount		$ 39,500	$ 0
HEP [Member] | 6.5% Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Stated interest rate, senior notes		6.50%
Senior notes		$ 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
Subsequent Event [Member]
Debt Instrument [Line Items]
Proceeds from Loans	$ 350,000