Financial Instruments (Estimated Fair Values Of Debt Instruments) (Details) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Holly Frontier [Member]
Debt Instrument [Line Items]
Senior notes, Carrying Amount	$ 659,850	$ 289,509
Senior notes, Fair Value	684,829	327,000
HEP [Member]
Debt Instrument [Line Items]
Senior notes, Carrying Amount	325,213	323,271
Senior notes, Fair Value	$ 337,938	$ 339,900

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

Name:	us-gaap_SeniorNotes
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant