Financial Instruments (Estimated Fair Values Of Debt Instruments) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Assets, Fair Value Disclosure, Recurring	$ 184,889	$ 701,044
Financial Liabilities Fair Value Disclosure	394,544	644,212
Reported Value Measurement [Member]
Debt Instrument [Line Items]
Assets, Fair Value Disclosure, Recurring	184,889	701,044
Financial Liabilities Fair Value Disclosure	395,796	648,092
Level 1
Debt Instrument [Line Items]
Assets, Fair Value Disclosure, Recurring	3,469	17,619
Level 2
Debt Instrument [Line Items]
Assets, Fair Value Disclosure, Recurring	181,420	683,425
Financial Liabilities Fair Value Disclosure	394,544	644,212
Marketable securities [Member]
Debt Instrument [Line Items]
Assets, Fair Value Disclosure, Recurring	144,019	474,110
Marketable securities [Member] | Reported Value Measurement [Member]
Debt Instrument [Line Items]
Assets, Fair Value Disclosure, Recurring	144,019	474,110
Marketable securities [Member] | Level 2
Debt Instrument [Line Items]
Assets, Fair Value Disclosure, Recurring	144,019	474,110
Commodity Contract [Member]
Debt Instrument [Line Items]
Assets, Fair Value Disclosure, Recurring	37,097	208,296
Financial Liabilities Fair Value Disclosure	98,930	196,897
Commodity Contract [Member] | Reported Value Measurement [Member]
Debt Instrument [Line Items]
Assets, Fair Value Disclosure, Recurring	37,097	208,296
Financial Liabilities Fair Value Disclosure	98,930	196,897
Commodity Contract [Member] | Level 2
Debt Instrument [Line Items]
Assets, Fair Value Disclosure, Recurring	37,097	208,296
Financial Liabilities Fair Value Disclosure	98,930	196,897
NYMEX futures contracts
Debt Instrument [Line Items]
Assets, Fair Value Disclosure, Recurring	3,469	17,619
NYMEX futures contracts | Reported Value Measurement [Member]
Debt Instrument [Line Items]
Assets, Fair Value Disclosure, Recurring	3,469	17,619
NYMEX futures contracts | Level 1
Debt Instrument [Line Items]
Assets, Fair Value Disclosure, Recurring	3,469	17,619
NYMEX futures contracts | Level 2
Debt Instrument [Line Items]
Assets, Fair Value Disclosure, Recurring	0	0
Senior notes
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure		155,250
Senior notes | HEP
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure	295,500	291,000
Senior notes | Reported Value Measurement [Member]
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure		154,144
Senior notes | Reported Value Measurement [Member] | HEP
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure	296,752	295,986
Senior notes | Level 2
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure		155,250
Senior notes | Level 2 | HEP
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure	295,500	291,000
Interest rate swap | HEP
Debt Instrument [Line Items]
Assets, Fair Value Disclosure, Recurring	304	1,019
Financial Liabilities Fair Value Disclosure	114	1,065
Interest rate swap | Reported Value Measurement [Member] | HEP
Debt Instrument [Line Items]
Assets, Fair Value Disclosure, Recurring	304	1,019
Financial Liabilities Fair Value Disclosure	114	1,065
Interest rate swap | Level 2 | HEP
Debt Instrument [Line Items]
Assets, Fair Value Disclosure, Recurring	304	1,019
Financial Liabilities Fair Value Disclosure	$ 114	$ 1,065