Other Comprehensive Income (Loss) (Components And Allocated Tax Effects Of Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Other Comprehensive Income (Loss) [Abstract]
Net unrealized gain on marketable securities	$ 11	$ 16
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax	(3)	8
Net unrealized gain on hedging instruments	87,083	18,297
Net change in post-retirement benefit obligations	(89)	0
Net change in post-retirement benefit obligations	0	1,726
Other comprehensive income (loss)	87,005	20,039
Less other comprehensive income attributable to noncontrolling interest	58	792
Other Comprehensive Income (Loss) attributable to HollyFrontier stockholders	86,947	19,247
Net unrealized gain on marketable securities, tax expense (benefit)	2,043	(10,823)
Net unrealized gain (loss) on hedging instruments, tax expense (benefit)	33,743	6,809
Net change in post-retirement benefit obligations, tax expense (benefit)	(35)	671
Other comprehensive income, tax expense (benefit)	33,705	7,488
Less other comprehensive income attributable to noncontrolling interest, tax expense (benefit)	0	0
Other comprehensive income attributable to HollyFrontier stockholders, tax expense (benefit)	33,705	7,488
Net unrealized gain on marketable securities, after tax	14	8
Net unrealized gain (loss) on hedging instruments, after tax	53,340	11,488
Net Change in Post-retirement Benefit Obligations, After Tax	(54)	1,055
Other comprehensive income, after tax	53,300	12,551
Less other comprehensive income attributable to noncontrolling interest, after tax	58	792
Other comprehensive income (loss) attributable to HollyFrontier stockholders, after tax	$ 53,242	$ 11,759