Derivative Instruments And Hedging Activities (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended					9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Cost of Sales [Member]	Sep. 30, 2011 Cost of Sales [Member]	Sep. 30, 2012 Cost of Sales [Member]	Sep. 30, 2011 Cost of Sales [Member]	Sep. 30, 2012 Operating Expense [Member]	Sep. 30, 2011 Operating Expense [Member]	Sep. 30, 2012 Operating Expense [Member]	Sep. 30, 2011 Operating Expense [Member]	Sep. 30, 2013 Ultra Low Sulfur Diesel [Member] bbl	Sep. 30, 2012 Ultra Low Sulfur Diesel [Member] bbl	Sep. 30, 2012 Natural Gas [Member] bbl	Sep. 30, 2012 HEP [Member]	Jun. 30, 2012 HEP [Member]	Sep. 30, 2012 HEP [Member] Interest Rate Contract [Member]	Sep. 30, 2012 Holly Credit Agreement Member HEP [Member]
Derivative [Line Items]
Number of barrels hedged under swap contracts													7,475,000	2,668,000	3,312,000
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	$ (107,000)	$ 1,093,000	$ 578,000	$ 2,647,000
Gain (loss) on economic hedges	(20,473,000)	(10,034,000)	(56,184,000)	(9,382,000)	(19,869,000)	(10,034,000)	(55,738,000)	(9,382,000)	(604,000)	0	(446,000)	0
Credit agreement advance																		155,000,000	305,000,000
Fixed interest rate																		0.74%
Rate added to fixed base rate																		2.00%
Effective interest rate on debt																		2.74%
Accumulated Other Comprehensive loss that relates to cash flow hedging instruments																	5,900,000
Cash flow hedge to be amortized to interest expense within twelve months																2,100,000
Net unrealized gain on accumulated other comprehensive loss related to cash flow hedges			(68,700,000)
Net unrealized gain effectively transferred from accumulated other comprehensive loss hedging instruments			$ (66,000,000)
Gain (loss) on derivatives reclassified from accumulated OCI to income, period	12 months