Other Comprehensive Income (Loss) (Components And Allocated Tax Effects Of Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Other Comprehensive Income (Loss) [Abstract]
Unrealized loss on available-for-sale securities Before-Tax	$ (404)	$ (459)	$ (216)	$ (317)
Unrealized gain (loss) on hedging activities, Before-Tax	30,801	271	(124,814)	1,592
Other Comprehensive Income (Loss), Finalization of Pension and Non-Pension Postretirement Plan Valuation, before Tax	7,102		7,102
Other comprehensive income (loss), Before-Tax	37,499	(188)	(117,928)	1,275
Less other comprehensive income attributable to noncontrolling interest, Before-Tax	(137)	178	400	1,020
Other comprehensive income attributable to HollyFrontier stockholders, Before-Tax	37,636	(366)	(118,328)	255
Unrealized loss on available-for-sale securities, Tax Expense (Benefit)	(158)	(179)	(84)	(124)
Unrealized gain on hedging activities, Tax Expense (Benefit)	12,035	35	(48,709)	222
Other Comprehensive Income (Loss), Finalization of Pension and Non-Pension Postretirement Plan Valuation, Tax	2,763		2,763
Other comprehensive income, Tax Expense (Benefit)	14,640	(144)	(46,030)	98
Less other comprehensive income attributable to noncontrolling interest, Tax Expense (Benefit)	0	0	0	0
Other comprehensive income attributable to HollyFrontier stockholders, Tax Expense (Benefit)	14,640	(144)	(46,030)	98
Unrealized loss on available-for-sale securities, After-Tax	(246)	(280)	(132)	(193)
Unrealized gain on hedging activities, After-Tax	18,766	236	(76,105)	1,370
Other Comprehensive Income (Loss), Finalization of Pension and Non-Pension Postretirement Plan Valuation, Net of Tax	4,339		4,339
Other comprehensive income, After-Tax	22,859	(44)	(71,898)	1,177
Less other comprehensive income attributable to noncontrolling interest, After-Tax	(137)	178	400	1,020
Other comprehensive income attributable to HollyFrontier stockholders, After-Tax	$ 22,996	$ (222)	$ (72,298)	$ 157

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Other Comprehensive Income Net Unrealized Holding Gain Loss On Securities Arising During Period

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Pre tax change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges, net of reclassifications into earnings during the period. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. Includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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