Segment Information (Schedule Of Segment Reporting Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Cash, Cash Equivalents, and Short-term Investments	$ 1,008,599		$ 1,042,095
Sales and other revenues	3,006,626us-gaap_RefiningAndMarketingRevenue	4,791,053us-gaap_RefiningAndMarketingRevenue
Depreciation and amortization	80,012	80,548
Income (loss) from operations	388,622us-gaap_OperatingIncomeLoss	270,996us-gaap_OperatingIncomeLoss
Capital expenditures	172,619	124,281
Total assets	9,262,127us-gaap_Assets		9,230,640us-gaap_Assets
Long-term Debt	1,077,369us-gaap_LongTermDebt		1,054,890us-gaap_LongTermDebt
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Cash, Cash Equivalents, and Short-term Investments	1,002,601		1,039,177
Sales and other revenues	218	1,115
Depreciation and amortization	2,654	2,030
Income (loss) from operations	(28,949)	(25,555)
Capital expenditures	4,425	3,734
Total assets	1,106,374		1,150,865
Long-term Debt	186,627		187,311
Consolidation, Eliminations [Member]
Segment Reporting Information [Line Items]
Cash, Cash Equivalents, and Short-term Investments	0		0
Sales and other revenues	(72,628)	(72,154)
Depreciation and amortization	(207)	(207)
Income (loss) from operations	(540)	(523)
Capital expenditures	0	0
Total assets	(317,948)		(320,042)
Long-term Debt	0		0
2911 Petroleum Refining [Member]
Segment Reporting Information [Line Items]
Cash, Cash Equivalents, and Short-term Investments	196		88
Sales and other revenues	2,989,280	4,775,080
Depreciation and amortization	63,275	63,541
Income (loss) from operations	373,901	251,209
Capital expenditures	129,761	99,943
Total assets	7,015,682		6,965,245
Long-term Debt	0		0
HEP [Member]
Segment Reporting Information [Line Items]
Cash, Cash Equivalents, and Short-term Investments	5,802		2,830
Sales and other revenues	89,756	87,012
Depreciation and amortization	14,290	15,184
Income (loss) from operations	44,210	45,865
Capital expenditures	38,433	20,604
Total assets	1,458,019		1,434,572
Long-term Debt	$ 890,742		$ 867,579

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Revenue related to the downstream oil and gas activities, including the refining of crude oil, as well as the marketing and distribution of crude oil, refined petroleum products, and natural gas.

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