Debt (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Jul. 27, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Maximum borrowing capacity under revolving credit agreement	$ 1,350,000			$ 1,350,000
Letters of Credit Outstanding, Amount	3,100			3,100
Repayments of Lines of Credit				$ 26,000
Line of Credit Facility, Expiration Date				Feb. 01, 2022
Proceeds from Short-term Debt				$ 26,000
Repayment of financing obligation			$ (39,500)		$ (39,500)
Other Loans Payable, Long-term, Noncurrent							$ 350,000
Extinguishment of Debt, Amount					30,800
Loss on early extinguishment of debt	0	$ 0	(8,700)	(12,225)	(8,718)
Redemption Premium	9,800
Capitalized Interest Costs	600	$ 3,500		3,200	4,200
Debt Instrument, Unamortized Discount	$ 2,400			$ 2,400
6.5% Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate, senior notes	6.50%			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%			5.875%
Senior notes	$ 1,000,000			$ 1,000,000			1,000,000
Debt Instrument, Unamortized Discount	$ 8,788			$ 8,788			8,775
Six Percent Senior Notes Due Two Thousand Twenty Four [Member] [Member]
Debt Instrument [Line Items]
Stated interest rate, senior notes	6.00%			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			$ 1,200,000
Proceeds from Lines of Credit				479,000
Repayments of Lines of Credit				189,000
Line of Credit Facility, Expiration Date	Nov. 11, 2018
Borrowings outstanding under revolving credit agreement	$ 843,000			843,000			553,000
Repayment of financing obligation				$ 0	$ (39,500)
Debt Instrument, Maturity Date				Aug. 01, 2024
HEP [Member] | 6.5% Senior Notes [Member]
Debt Instrument [Line Items]
Senior Notes Aggregate Redemption Amount	309,800			$ 309,800
Senior notes	300,000			$ 300,000
Debt Instrument, Maturity Date				Mar. 01, 2020
HEP [Member] | Six Percent Senior Notes Due Two Thousand Twenty Four [Member] [Member]
Debt Instrument [Line Items]
Senior notes	400,000			$ 400,000			400,000
Debt Instrument, Unamortized Discount	$ 6,261			$ 6,261			$ 6,607
Subsequent Event [Member] | HEP [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity under revolving credit agreement						$ 1,400,000
Line of Credit Facility, Capacity Available for Trade Purchases						50,000
Pension Cost (Reversal of Cost)						$ 300,000