Segment Information (Schedule Of Segment Reporting Information) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Sales and other revenues	$ 3,585,823	$ 5,317,555	$ 10,294,361	$ 15,481,208
Depreciation and amortization	87,764	80,945	255,579	262,883
Income (loss) from operations	322,605	302,611	1,301,059	869,952
Capital expenditures	156,984	124,364	473,897	369,133
Cash, Cash Equivalents, and Short-term Investments	626,784		626,784		$ 1,042,095
Total assets	9,071,637		9,071,637		9,230,640
Long-term Debt	982,846		982,846		1,054,890
2911 Petroleum Refining [Member]
Segment Reporting Information [Line Items]
Sales and other revenues	3,571,192	5,303,053	10,246,965	15,440,047
Depreciation and amortization	68,976	63,109	202,686	210,490
Income (loss) from operations	310,810	292,132	1,261,024	835,555
Capital expenditures	147,641	98,115	405,738	290,392
Cash, Cash Equivalents, and Short-term Investments	62		62		88
Total assets	7,122,334		7,122,334		6,965,245
Long-term Debt	0		0		0
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Sales and other revenues	104	181	473	1,802
Depreciation and amortization	3,076	2,965	8,645	7,275
Income (loss) from operations	(31,296)	(28,313)	(86,984)	(81,670)
Capital expenditures	1,870	3,374	10,873	17,084
Cash, Cash Equivalents, and Short-term Investments	615,866		615,866		1,039,177
Total assets	753,619		753,619		1,150,865
Long-term Debt	31,779		31,779		187,311
Consolidation, Eliminations [Member]
Segment Reporting Information [Line Items]
Sales and other revenues	(73,862)	(67,820)	(214,701)	(204,818)
Depreciation and amortization	(207)	(207)	(621)	(621)
Income (loss) from operations	(611)	(549)	(1,727)	(1,603)
Capital expenditures	0	0	0	0
Cash, Cash Equivalents, and Short-term Investments	0		0		0
Total assets	(303,576)		(303,576)		(320,042)
Long-term Debt	0		0		0
HEP [Member]
Segment Reporting Information [Line Items]
Sales and other revenues	88,389	82,141	261,624	244,177
Depreciation and amortization	15,919	15,078	44,869	45,739
Income (loss) from operations	43,702	39,341	128,746	117,670
Capital expenditures	7,473	$ 22,875	57,286	$ 61,657
Cash, Cash Equivalents, and Short-term Investments	10,856		10,856		2,830
Total assets	1,499,260		1,499,260		1,434,572
Long-term Debt	$ 951,067		$ 951,067		$ 867,579