Fair Value Measurements (Estimated Fair Values Of Debt Instruments) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Assets, Fair Value Disclosure, Nonrecurring Basis	$ 44,400
Financial instruments, assets at carrying value	37,816	$ 184,889
Financial Liabilities Fair Value Disclosure	645,086	394,544
Level 1 [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value		3,469
Financial Liabilities Fair Value Disclosure	768
Level 2 [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	37,816	181,420
Financial Liabilities Fair Value Disclosure	644,318	394,544
Marketable securities
Debt Instrument [Line Items]
Financial instruments, assets at carrying value		144,019
Marketable securities | Level 2 [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value		144,019
Commodity Contract [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	33,619	37,097
Financial Liabilities Fair Value Disclosure	91,295	98,930
Commodity Contract [Member] | Level 2 [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	33,619	37,097
Financial Liabilities Fair Value Disclosure	91,295	98,930
Forward Contracts [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	4,197
Financial Liabilities Fair Value Disclosure	6,947
Forward Contracts [Member] | Level 2 [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	4,197
Financial Liabilities Fair Value Disclosure	6,947
Nymex Futures Contracts [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value		3,469
Financial Liabilities Fair Value Disclosure	768
Nymex Futures Contracts [Member] | Level 1 [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value		3,469
Financial Liabilities Fair Value Disclosure	768
Nymex Futures Contracts [Member] | Level 2 [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value		0
Financial Liabilities Fair Value Disclosure	0
Interest Rate Swap [Member] | HEP [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value		304
Financial Liabilities Fair Value Disclosure	263	114
Interest Rate Swap [Member] | Level 2 [Member] | HEP [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value		304
Financial Liabilities Fair Value Disclosure	263	114
Senior Notes [Member]
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure	250,313
Senior Notes [Member] | HEP [Member]
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure	295,500	295,500
Senior Notes [Member] | Level 2 [Member]
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure	250,313
Senior Notes [Member] | Level 2 [Member] | HEP [Member]
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure	295,500	295,500
Reported Value Measurement [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	37,816	184,889
Financial Liabilities Fair Value Disclosure	642,441	395,796
Reported Value Measurement [Member] | Marketable securities
Debt Instrument [Line Items]
Financial instruments, assets at carrying value		144,019
Reported Value Measurement [Member] | Commodity Contract [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	33,619	37,097
Financial Liabilities Fair Value Disclosure	91,295	98,930
Reported Value Measurement [Member] | Forward Contracts [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	4,197
Financial Liabilities Fair Value Disclosure	6,947
Reported Value Measurement [Member] | Nymex Futures Contracts [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value		3,469
Financial Liabilities Fair Value Disclosure	768
Reported Value Measurement [Member] | Interest Rate Swap [Member] | HEP [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value		304
Financial Liabilities Fair Value Disclosure	263	114
Reported Value Measurement [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure	246,224
Reported Value Measurement [Member] | Senior Notes [Member] | HEP [Member]
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure	$ 296,944	$ 296,752