Debt (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended						6 Months Ended	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 6.875% Senior Notes Due 2018 [Member]	Dec. 31, 2013 6.875% Senior Notes Due 2018 [Member]	Jul. 01, 2014 Holly Frontier Credit Agreement [Member]	Jun. 30, 2014 Holly Frontier Credit Agreement [Member]	Jun. 30, 2014 Plains [Member] Lease [Member]	Mar. 31, 2014 HEP [Member] 8.25% Senior Notes Due 2018 [Member]	Jun. 30, 2014 HEP [Member] 8.25% Senior Notes Due 2018 [Member]	Dec. 31, 2013 HEP [Member] 8.25% Senior Notes Due 2018 [Member]	Jun. 30, 2014 HEP [Member] 6.5% Senior Notes Due 2020 [Member]	Dec. 31, 2013 HEP [Member] 6.5% Senior Notes Due 2020 [Member]	Jun. 30, 2014 HEP [Member] Letter of Credit [Member]	Jun. 30, 2014 HEP [Member] Holly Energy Partners Credit Agreement [Member]	Dec. 31, 2013 HEP [Member] Holly Energy Partners Credit Agreement [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity under revolving credit agreement							$ 1,000,000,000	$ 1,000,000,000							$ 50,000,000	$ 650,000,000
Letters of Credit Outstanding, Amount								4,500,000
Line of Credit Facility, Capacity Available for Swingline Loans								100,000,000
Borrowings outstanding under revolving credit agreement																543,000,000	363,000,000
Stated interest rate, senior notes		9.875%		9.875%	6.875%					8.25%			6.50%
Extinguishment of Debt, Amount				301,000,000						156,200,000
Gains (Losses) on Extinguishment of Debt	0	22,109,000	7,677,000	22,109,000						(7,700,000)
Redemption Premium				14,200,000						6,200,000
Amortization of Financing Costs and Discounts				7,900,000						1,500,000
Senior notes					150,000,000	150,000,000					0	150,000,000	300,000,000	300,000,000
Debt Instrument, Face Amount		286,800,000		286,800,000						150,000,000
Proceeds from sale of storage assets									40,000,000
Term of lease, years									15 years
Interest Costs Capitalized	$ 3,100,000	$ 3,000,000	$ 6,000,000	$ 6,400,000