Other Comprehensive Income (Loss) (Components And Allocated Tax Effects Of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Other Comprehensive Income (Loss) Components and Tax Effects [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, before Tax	$ 16,702	$ 0	$ 24,287	$ 0
Net Unrealized Gain (Loss) on Marketable Securities		(29)	(4)	84
Net unrealized gain on hedging instruments	3,291	3,101	8,567	18,953
Other comprehensive income (loss)	19,993	3,072	32,850	19,037
Less other comprehensive income attributable to noncontrolling interest	(40)	179	(57)	(181)
Other comprehensive income (loss) attributable to HollyFrontier stockholders	20,033	2,893	32,907	19,218
Other Comprehensive Income (Loss), Foreign Currency Translation Gain (Loss) Arising During Period, Tax	5,851		8,505
Net Unrealized Gain (loss) on Marketable Securities, Tax Expense (Benefit)		(12)	(1)	32
Net unrealized gain (loss) on hedging instruments, tax expense (benefit)	1,289	1,131	3,337	7,404
Other comprehensive income (loss), tax expense	7,140	1,119	11,841	7,436
Other comprehensive income (loss) attributable to HollyFrontier stockholders, tax expense	7,140	1,119	11,841	7,436
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	10,851		15,782
Net unrealized gain (loss) on marketable securities, after tax		(17)	(3)	52
Net unrealized gain (loss) on hedging instruments, after tax	2,002	1,970	5,230	11,549
Other comprehensive income (loss), net of tax	12,853	1,953	21,009	11,601
Less other comprehensive income (loss) attributable to noncontrolling interest, after tax	(40)	179	(57)	(181)
Other comprehensive income (loss) attributable to HollyFrontier stockholders	$ 12,893	$ 1,774	$ 21,066	$ 11,782