Supplemental Guarantor / Non-Guarantor Financial Information Condensed Consolidating Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	$ 77,947	$ 71,155
Cash flows from investing activities
Additions to properties and equipment	(18,942)	(10,718)
Payments to Acquire Interest in Joint Venture	(2,345)	0
Distributions from UNEV in excess of earnings	0	0
Proceeds from sale of assets	417	9
Distributions in excess of equity in earnings of equity investments		395
Net cash provided by (used for) investing activities	(20,870)	(10,314)
Cash flows from financing activities
Net borrowings (repayments) under credit agreement	45,000	19,000
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	354	0
Contribution from Joint Venture Partner	7,304	0
Distributions to HEP unitholders	(68,519)	(67,975)
Distributions to noncontrolling interests	(3,000)	(3,000)
Units withheld for tax withholding obligations	(147)	(119)
Payments of Debt Issuance Costs	(8,478)	0
Payments on finance leases	(1,096)	(252)
Other financing activities		252
Net cash provided by (used by) financing activities	(51,082)	(52,346)
Increase (decrease) for the period	5,995	8,495
Beginning of period	13,287	3,045
End of period	19,282	11,540
Parent
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(24,974)	(26,584)
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	0
Proceeds from sale of assets	0	0
Distributions in excess of equity in earnings of equity investments		0
Net cash provided by (used for) investing activities	0	0
Cash flows from financing activities
Net borrowings (repayments) under credit agreement	45,000	19,000
Net intercompany financing activities	76,196	75,678
Early Repayment of Senior Debt	(522,500)
Proceeds from Issuance of Senior Long-term Debt	500,000
Contributions from general partner	354
Contribution from Joint Venture Partner	0
Distributions to HEP unitholders	(68,519)	(67,975)
Distributions to noncontrolling interests	0	0
Units withheld for tax withholding obligations	(147)	(119)
Payments of Debt Issuance Costs	(8,478)
Payments on finance leases	0
Other financing activities		0
Net cash provided by (used by) financing activities	21,906	26,584
Increase (decrease) for the period	(3,068)	0
Beginning of period	4,790	2
End of period	1,722	2
Guarantor Restricted Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	85,061	91,226
Cash flows from investing activities
Additions to properties and equipment	(5,942)	(10,564)
Payments to Acquire Interest in Joint Venture	(7,304)
Distributions from UNEV in excess of earnings	4,617	(3,504)
Proceeds from sale of assets	417	9
Distributions in excess of equity in earnings of equity investments		395
Net cash provided by (used for) investing activities	(8,212)	(6,656)
Cash flows from financing activities
Net borrowings (repayments) under credit agreement	0	0
Net intercompany financing activities	(76,196)	(75,678)
Early Repayment of Senior Debt	0
Proceeds from Issuance of Senior Long-term Debt	0
Contributions from general partner	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 Debt Issuance Costs	0
Payments on finance leases	(1,096)
Other financing activities		252
Net cash provided by (used by) financing activities	(77,292)	(75,930)
Increase (decrease) for the period	(443)	8,640
Beginning of period	(709)	0
End of period	(1,152)	8,640
Non-Guarantor Non-Restricted Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	22,243	12,009
Cash flows from investing activities
Additions to properties and equipment	(13,000)	(154)
Payments to Acquire Interest in Joint Venture	(2,345)
Distributions from UNEV in excess of earnings	0	0
Proceeds from sale of assets	0	0
Distributions in excess of equity in earnings of equity investments		0
Net cash provided by (used for) investing activities	(15,345)	(154)
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	7,304
Contribution from Joint Venture Partner	7,304
Distributions to HEP unitholders	0	0
Distributions to noncontrolling interests	(12,000)	(12,000)
Units withheld for tax withholding obligations	0	0
Payments of Debt Issuance Costs	0
Payments on finance leases	0
Other financing activities		0
Net cash provided by (used by) financing activities	2,608	(12,000)
Increase (decrease) for the period	9,506	(145)
Beginning of period	9,206	3,043
End of period	18,712	2,898
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(4,383)	(5,496)
Cash flows from investing activities
Additions to properties and equipment	0	0
Payments to Acquire Interest in Joint Venture	7,304
Distributions from UNEV in excess of earnings	(4,617)	(3,504)
Proceeds from sale of assets	0	0
Distributions in excess of equity in earnings of equity investments		0
Net cash provided by (used for) investing activities	2,687	(3,504)
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	(7,304)
Contribution from Joint Venture Partner	0
Distributions to HEP unitholders	0	0
Distributions to noncontrolling interests	9,000	9,000
Units withheld for tax withholding obligations	0	0
Payments of Debt Issuance Costs	0
Payments on finance leases	0
Other financing activities		0
Net cash provided by (used by) financing activities	1,696	9,000
Increase (decrease) for the period	0	0
Beginning of period	0	0
End of period	$ 0	$ 0