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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, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Other Comprehensive Income (Loss) [Abstract]        
Net unrealized gain (loss) on marketable securities $ 25 $ (45) $ 36 $ (29)
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax 17 (36) 14 (28)
Net unrealized gain on hedging instruments 34,315 21,858 121,398 40,155
Net change in post-retirement benefit obligations 0 0 89 0
Other comprehensive income (loss) 34,340 50,799 121,345 70,838
Less other comprehensive income attributable to noncontrolling interest (453) 1,940 (395) 2,733
Other Comprehensive Income (Loss) attributable to HollyFrontier stockholders 34,793 48,859 121,740 68,105
Net unrealized gain (loss) on hedging instruments, tax expense (benefit) 13,400 7,747 47,143 14,556
Net change in post-retirement benefit obligations, tax expense (benefit)   11,275 (35) 11,946
Other comprehensive income, tax expense 13,417 18,986 47,122 26,474
Other comprehensive income attributable to HollyFrontier stockholders, tax expense (benefit) 13,417 18,986 47,122 26,474
Net unrealized gain on marketable securities, after tax 8 (9) 22 (1)
Net unrealized gain (loss) on hedging instruments, after tax 20,915 14,111 74,255 25,599
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax   28,986   30,712
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax 0 28,986 (89) 30,712
Net Change in Post-retirement Benefit Obligations, After Tax   17,711 (54) 18,766
Other comprehensive income, after tax 20,923 31,813 74,223 44,364
Less other comprehensive income attributable to noncontrolling interest, after tax (453) 1,940 (395) 2,733
Other comprehensive income (loss) attributable to HollyFrontier stockholders, after tax $ 21,376 $ 29,873 $ 74,618 $ 41,631