Equity (Changes To Equity) (Details) - USD ($) $ in Thousands, shares in Billions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at December 31, 2015	$ 5,253,415
Net income	43,390	$ 242,661
Other comprehensive income (loss), net of tax	(686)	(11,976)
Purchase of treasury stock	(133,430)	$ (55,065)
Balance at March 31, 2016	$ 5,086,824
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	1
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 178,800
Holly Corporation Stockholders' Equity [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at December 31, 2015	5,253,415
Net income	21,253
Dividends	(58,402)
Distributions to noncontrolling interest	0
Other comprehensive income (loss), net of tax	(411)
Equity-based compensation	2,575
Tax attributable to equity-based compensation	(2,225)
Purchase of treasury stock	(129,381)
Purchase of units for incentive grants - HEP	0
Other	0
Balance at March 31, 2016	5,086,824
Noncontrolling Interest [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at December 31, 2015	556,358
Net income	22,137
Dividends	0
Other comprehensive income (loss), net of tax	(275)
Equity-based compensation	651
Tax attributable to equity-based compensation	0
Purchase of treasury stock	0
Purchase of units for incentive grants - HEP	(784)
Other	18
Balance at March 31, 2016	556,374
Stockholders' Equity, Total [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at December 31, 2015	5,809,773
Net income	43,390
Dividends	(58,402)
Distributions to noncontrolling interest	(21,731)
Other comprehensive income (loss), net of tax	(686)
Equity-based compensation	3,226
Tax attributable to equity-based compensation	(2,225)
Purchase of treasury stock	(129,381)
Purchase of units for incentive grants - HEP	(784)
Other	18
Balance at March 31, 2016	$ 5,643,198