Supplemental Guarantor / Non-Guarantor Financial Information Condensed Consolidating Statement of Cash Flows (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	$ 225,040	$ 228,217
Cash flows from investing activities
Additions to properties and equipment	(38,642)	(23,828)
Payments to Acquire Interest in Joint Venture	(2,438)	0
Distributions from UNEV in excess of earnings		0
Proceeds from sale of assets	961	265
Distributions in excess of equity in earnings of equity investments	701	693
Net cash provided by (used for) investing activities	(39,418)	(22,870)
Cash flows from financing activities
Net borrowings (repayments) under credit agreement	(17,500)	12,500
Net intercompany financing activities	0	0
Early Repayment of Senior Debt	(522,500)	0
Proceeds from Issuance of Senior Long-term Debt	500,000	0
Contributions from general partner	611	182
Contribution from Joint Venture Partner	15,382	0
Distributions to HEP unitholders	(137,437)	(204,701)
Distributions to noncontrolling interests	(7,845)	(7,750)
Units withheld for tax withholding obligations	(149)	(119)
Payments of Financing Costs		(255)
Payments of Debt Issuance Costs	(8,714)	0
Payments on finance leases	(2,666)	(780)
Other financing activities		0
Net cash provided by (used by) financing activities	(180,818)	(200,923)
Increase (decrease) for the period	4,804	4,424
Beginning of period	13,287	3,045
End of period	18,091	7,469
Parent
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(49,182)	(62,229)
Cash flows from investing activities
Additions to properties and equipment	0	0
Payments to Acquire Interest in Joint Venture	0
Distributions from UNEV in excess of earnings		0
Proceeds from sale of assets	0	0
Distributions in excess of equity in earnings of equity investments	0	0
Net cash provided by (used for) investing activities	0	0
Cash flows from financing activities
Net borrowings (repayments) under credit agreement	(17,500)	12,500
Net intercompany financing activities	234,081	260,362
Early Repayment of Senior Debt	(522,500)
Proceeds from Issuance of Senior Long-term Debt	500,000
Contributions from general partner	611	182
Contribution from Joint Venture Partner	0
Distributions to HEP unitholders	(137,437)	(204,701)
Distributions to noncontrolling interests	0	0
Units withheld for tax withholding obligations	(149)	(119)
Payments of Financing Costs		(255)
Payments of Debt Issuance Costs	(8,714)
Payments on finance leases	0	0
Other financing activities		(139)
Net cash provided by (used by) financing activities	48,392	67,830
Increase (decrease) for the period	(790)	5,601
Beginning of period	4,790	2
End of period	4,000	5,603
Guarantor Restricted Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	250,355	271,657
Cash flows from investing activities
Additions to properties and equipment	(10,675)	(23,227)
Payments to Acquire Interest in Joint Venture	(15,382)
Distributions from UNEV in excess of earnings		(10,572)
Proceeds from sale of assets	961	265
Distributions in excess of equity in earnings of equity investments	11,084	693
Net cash provided by (used for) investing activities	(14,012)	(11,697)
Cash flows from financing activities
Net borrowings (repayments) under credit agreement	0	0
Net intercompany financing activities	(234,081)	(260,362)
Early Repayment of Senior Debt	0
Proceeds from Issuance of Senior Long-term Debt	0
Contributions from general partner	0	0
Contribution from Joint Venture Partner	0
Distributions to HEP unitholders	0	0
Distributions to noncontrolling interests	0	0
Units withheld for tax withholding obligations	0	0
Payments of Financing Costs
Payments of Debt Issuance Costs	0
Payments on finance leases	(2,666)	(780)
Other financing activities		139
Net cash provided by (used by) financing activities	(236,747)	(261,003)
Increase (decrease) for the period	(404)	(1,043)
Beginning of period	(709)	0
End of period	(1,113)	(1,043)
Non-Guarantor Non-Restricted Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	36,261	31,467
Cash flows from investing activities
Additions to properties and equipment	(27,967)	(601)
Payments to Acquire Interest in Joint Venture	(2,438)
Distributions from UNEV in excess of earnings		0
Proceeds from sale of assets	0	0
Distributions in excess of equity in earnings of equity investments	0	0
Net cash provided by (used for) investing activities	(30,405)	(601)
Cash flows from financing activities
Net borrowings (repayments) under credit agreement	0	0
Net intercompany financing activities	0	0
Early Repayment of Senior Debt	0
Proceeds from Issuance of Senior Long-term Debt	0
Contributions from general partner	15,382	0
Contribution from Joint Venture Partner	15,382
Distributions to HEP unitholders	0	0
Distributions to noncontrolling interests	(30,622)	(31,000)
Units withheld for tax withholding obligations	0	0
Payments of Financing Costs		0
Payments of Debt Issuance Costs	0
Payments on finance leases	0	0
Other financing activities		0
Net cash provided by (used by) financing activities	142	(31,000)
Increase (decrease) for the period	5,998	(134)
Beginning of period	9,206	3,043
End of period	15,204	2,909
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(12,394)	(12,678)
Cash flows from investing activities
Additions to properties and equipment	0	0
Payments to Acquire Interest in Joint Venture	15,382
Distributions from UNEV in excess of earnings		(10,572)
Proceeds from sale of assets	0	0
Distributions in excess of equity in earnings of equity investments	(10,383)	0
Net cash provided by (used for) investing activities	4,999	(10,572)
Cash flows from financing activities
Net borrowings (repayments) under credit agreement	0	0
Net intercompany financing activities	0	0
Early Repayment of Senior Debt	0
Proceeds from Issuance of Senior Long-term Debt	0
Contributions from general partner	(15,382)	0
Contribution from Joint Venture Partner	0
Distributions to HEP unitholders	0	0
Distributions to noncontrolling interests	22,777	23,250
Units withheld for tax withholding obligations	0	0
Payments of Financing Costs		0
Payments of Debt Issuance Costs	0
Payments on finance leases	0	0
Other financing activities		0
Net cash provided by (used by) financing activities	7,395	23,250
Increase (decrease) for the period	0	0
Beginning of period	0	0
End of period	$ 0	$ 0