Equity (Changes To Equity) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Noncontrolling interest	$ 576,454
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	6,157,912		$ 5,896,940
Balance at December 31, 2017	5,370,829
Net income (loss)	288,862	$ (37,782)
Dividends	(58,856)
Distributions to noncontrolling interest holders	(29,237)
Other comprehensive income (loss), net of tax	(10,008)	(2,438)
Allocated equity on common unit issuances, net of tax	100,011
Equity-based compensation	8,797
Purchase of treasury stock	(27,520)
Purchase of units for incentive grants - HEP	(58)
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	(11,019)
Balance at March 31, 2018	$ 5,581,458
Shares Paid for Tax Withholding for Share Based Compensation	11,920
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	1,000,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 151,700
Holly Corporation Stockholders' Equity [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at December 31, 2017	5,370,829
Net income (loss)	268,091
Dividends	(58,856)
Distributions to noncontrolling interest holders	0
Other comprehensive income (loss), net of tax	(10,008)
Allocated equity on common unit issuances, net of tax	41,980
Equity-based compensation	7,961
Purchase of treasury stock	(27,520)	$ 0
Purchase of units for incentive grants - HEP	0
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	(11,019)
Balance at March 31, 2018	5,581,458
Noncontrolling Interest [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Noncontrolling interest	576,454		$ 526,111
Net income (loss)	20,771
Dividends	0
Distributions to noncontrolling interest holders	(29,237)
Other comprehensive income (loss), net of tax	0
Allocated equity on common unit issuances, net of tax	58,031
Equity-based compensation	836
Purchase of treasury stock	0
Purchase of units for incentive grants - HEP	(58)
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	$ 0