Financial Instruments (Estimated Fair Values Of Debt Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	$ 615,914	$ 701,044
Financial Liabilities Fair Value Disclosure	646,849	644,212
Level 1 [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	6,465	17,619
Level 2 [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	608,848	683,425
Financial Liabilities Fair Value Disclosure	643,696	644,212
Fair Value, Inputs, Level 3 [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	601
Financial Liabilities Fair Value Disclosure	3,153
Investments [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	414,507	474,110
Investments [Member] | Level 1 [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	0	0
Investments [Member] | Level 2 [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	414,507	474,110
Forward Contracts [Member]
Debt Instrument [Line Items]
Derivative Asset, Fair Value, Gross Asset	2,167
Financial Liabilities Fair Value Disclosure	3,352
Forward Contracts [Member] | Level 2 [Member]
Debt Instrument [Line Items]
Derivative Asset, Fair Value, Gross Asset	1,566
Financial Liabilities Fair Value Disclosure	199
Forward Contracts [Member] | Fair Value, Inputs, Level 3 [Member]
Debt Instrument [Line Items]
Derivative Asset, Fair Value, Gross Asset	601
Financial Liabilities Fair Value Disclosure	3,153
Senior Notes [Member]
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure	154,500	155,250
Senior Notes [Member] | HEP [Member]
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure	295,500	291,000
Senior Notes [Member] | Level 2 [Member]
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure	154,500	155,250
Senior Notes [Member] | Level 2 [Member] | HEP [Member]
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure	295,500	291,000
Nymex Futures Contracts [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	6,465	17,619
Nymex Futures Contracts [Member] | Level 1 [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	6,465	17,619
Nymex Futures Contracts [Member] | Level 2 [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	0
Interest Rate Swap [Member] | HEP [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	147	1,019
Financial Liabilities Fair Value Disclosure	942	1,065
Interest Rate Swap [Member] | Level 2 [Member] | HEP [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	147	1,019
Financial Liabilities Fair Value Disclosure	942	1,065
Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member] | HEP [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	0
Commodity Contract [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	192,628	208,296
Financial Liabilities Fair Value Disclosure	192,555	196,897
Commodity Contract [Member] | Level 2 [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	192,628	208,296
Financial Liabilities Fair Value Disclosure	192,555	196,897
Commodity Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure	0
CME SWAPS MARKETS (NYMEX) [Member] | Level 2 [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value		0
Reported Value Measurement [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	615,914	701,044
Financial Liabilities Fair Value Disclosure	647,499	648,685
Reported Value Measurement [Member] | Investments [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	414,507	474,110
Reported Value Measurement [Member] | Forward Contracts [Member]
Debt Instrument [Line Items]
Derivative Asset, Fair Value, Gross Asset	2,167
Financial Liabilities Fair Value Disclosure	3,352
Reported Value Measurement [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure	153,908	154,144
Reported Value Measurement [Member] | Senior Notes [Member] | HEP [Member]
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure	296,742	296,579
Reported Value Measurement [Member] | Nymex Futures Contracts [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	6,465	17,619
Reported Value Measurement [Member] | Interest Rate Swap [Member] | HEP [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	147	1,019
Financial Liabilities Fair Value Disclosure	942	1,065
Reported Value Measurement [Member] | Commodity Contract [Member]
Debt Instrument [Line Items]
Financial instruments, assets at carrying value	192,628	208,296
Financial Liabilities Fair Value Disclosure	$ 192,555	$ 196,897