Supplemental Guarantor / Non-Guarantor Financial Information Condensed Consolidating Statement of Cash Flows (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	$ 134,594	$ 144,989
Cash flows from investing activities
Additions to properties and equipment	(30,740)	(17,752)
Payments to Acquire Interest in Joint Venture	(2,400)	0
Distributions from UNEV in excess of earnings		0
Proceeds from sale of assets	816	194
Distributions in excess of equity in earnings of equity investments	470	299
Net cash provided by (used for) investing activities	(31,854)	(17,259)
Cash flows from financing activities
Net borrowings (repayments) under credit agreement	29,500	18,500
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	435	0
Contribution from Joint Venture Partner	13,263	0
Distributions to HEP unitholders	(102,979)	(136,207)
Distributions to noncontrolling interests	(4,000)	(5,250)
Units withheld for tax withholding obligations	(147)	(119)
Payments of Financing Costs		(255)
Payments of Debt Issuance Costs	(8,714)	0
Payments on finance leases	(1,972)	(503)
Other financing activities		(503)
Net cash provided by (used by) financing activities	(97,114)	(123,834)
Increase (decrease) for the period	5,626	3,896
Beginning of period	13,287	3,045
End of period	18,913	6,941
Parent
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(31,103)	(37,005)
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	29,500	18,500
Net intercompany financing activities	134,645	155,225
Early Repayment of Senior Debt	(522,500)
Proceeds from Issuance of Senior Long-term Debt	500,000
Contributions from general partner	435	0
Contribution from Joint Venture Partner	0
Distributions to HEP unitholders	(102,979)	(136,207)
Distributions to noncontrolling interests	0	0
Units withheld for tax withholding obligations	(147)	(119)
Payments of Financing Costs		(255)
Payments of Debt Issuance Costs	(8,714)
Payments on finance leases	0
Other financing activities		(139)
Net cash provided by (used by) financing activities	30,240	37,005
Increase (decrease) for the period	(863)	0
Beginning of period	4,790	2
End of period	3,927	2
Guarantor Restricted Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	151,331	165,882
Cash flows from investing activities
Additions to properties and equipment	(8,883)	(17,274)
Payments to Acquire Interest in Joint Venture	(13,263)
Distributions from UNEV in excess of earnings		(8,191)
Proceeds from sale of assets	816	194
Distributions in excess of equity in earnings of equity investments	6,559	299
Net cash provided by (used for) investing activities	(14,771)	(8,590)
Cash flows from financing activities
Net borrowings (repayments) under credit agreement	0	0
Net intercompany financing activities	(134,645)	(155,225)
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	(1,972)
Other financing activities		(364)
Net cash provided by (used by) financing activities	(136,617)	(155,589)
Increase (decrease) for the period	(57)	1,703
Beginning of period	(709)	0
End of period	(766)	1,703
Non-Guarantor Non-Restricted Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	20,277	23,671
Cash flows from investing activities
Additions to properties and equipment	(21,857)	(478)
Payments to Acquire Interest in Joint Venture	(2,400)
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	(24,257)	(478)
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	13,263	0
Contribution from Joint Venture Partner	13,263
Distributions to HEP unitholders	0	0
Distributions to noncontrolling interests	(16,000)	(21,000)
Units withheld for tax withholding obligations	0	0
Payments of Financing Costs		0
Payments of Debt Issuance Costs	0
Payments on finance leases	0
Other financing activities		0
Net cash provided by (used by) financing activities	10,526	(21,000)
Increase (decrease) for the period	6,546	2,193
Beginning of period	9,206	3,043
End of period	15,752	5,236
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(5,911)	(7,559)
Cash flows from investing activities
Additions to properties and equipment	0	0
Payments to Acquire Interest in Joint Venture	13,263
Distributions from UNEV in excess of earnings		(8,191)
Proceeds from sale of assets	0	0
Distributions in excess of equity in earnings of equity investments	(6,089)	0
Net cash provided by (used for) investing activities	7,174	(8,191)
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	(13,263)	0
Contribution from Joint Venture Partner	0
Distributions to HEP unitholders	0	0
Distributions to noncontrolling interests	12,000	15,750
Units withheld for tax withholding obligations	0	0
Payments of Financing Costs		0
Payments of Debt Issuance Costs	0
Payments on finance leases	0
Other financing activities		0
Net cash provided by (used by) financing activities	(1,263)	15,750
Increase (decrease) for the period	0	0
Beginning of period	0	0
End of period	$ 0	$ 0