Holly Energy Partners (HEP) 10-Q 2 Aug 18 2018 Q2 Quarterly report Financial data

Document Entity Information

Document Entity Information - USD ($)	6 Months Ended
	Jun. 30, 2018	Jul. 27, 2018	Jun. 30, 2017
Entity Information [Line Items]
Entity Registrant Name	HOLLY ENERGY PARTNERS LP
Entity Central Index Key	1,283,140
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		105,440,201
Entity Public Float			$ 1,200,000,000

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 6,656	$ 7,776
Accounts receivable:
Trade	13,501	12,803
Affiliates	36,665	51,501
Total accounts receivable	50,166	64,304
Prepaid and other current assets	3,146	2,311
Total current assets	59,968	74,391
Properties and equipment, net	1,551,709	1,569,471
Intangible assets, net	121,935	129,463
Goodwill	270,336	266,716
Equity method investments	84,752	85,279
Other assets	27,363	28,794
Total assets	2,116,063	2,154,114
Accounts payable:
Trade	9,148	14,547
Affiliates	11,250	7,725
Total accounts payable	20,398	22,272
Accrued interest	13,189	13,256
Deferred revenue	10,845	9,598
Accrued property taxes	5,540	4,652
Other current liabilities	3,593	5,707
Total current liabilities	53,565	55,485
Long-term debt	1,395,599	1,507,308
Other long-term liabilities	15,526	15,843
Deferred revenue	48,405	47,272
Class B unit	44,600	43,141
Partners’ equity:
Common unitholders (105,440,201 and 101,568,955 units issued and outstanding at June 30, 2018 and December 31, 2017, respectively)	468,397	393,959
Noncontrolling interest	89,971	91,106
Total Equity	558,368	485,065
Total liabilities and equity	$ 2,116,063	$ 2,154,114

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - shares	Jun. 30, 2018	Dec. 31, 2017
Partners' Equity:
Common units issued (in shares)	105,440,201	101,568,955
Common units outstanding (in shares)	105,440,201	101,568,955

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues:
Affiliates	$ 94,013	$ 93,152	$ 195,441	$ 182,177
Third parties	24,747	15,991	52,203	32,600
Total revenues	118,760	109,143	247,644	214,777
Operating costs and expenses:
Operations (exclusive of depreciation and amortization)	34,533	34,097	70,735	66,586
Depreciation and amortization	24,608	19,945	49,750	38,722
General and administrative	2,673	2,615	5,795	5,249
Total operating costs and expenses	61,814	56,657	126,280	110,557
Operating income	56,946	52,486	121,364	104,220
Other income (expense):
Equity in earnings of equity method investments	1,734	4,053	3,013	5,893
Interest expense	(17,626)	(13,748)	(35,207)	(27,287)
Interest income	526	103	1,041	205
Loss on early extinguishment of debt	0	0	0	(12,225)
Gain (loss) on sale of assets and other	(53)	89	33	162
Total other income (expense)	(15,419)	(9,503)	(31,120)	(33,252)
Income before income taxes	41,527	42,983	90,244	70,968
State income tax benefit (expense)	(28)	(127)	(110)	(233)
Net Income	41,499	42,856	90,134	70,735
Allocation of net income attributable to noncontrolling interests	(1,356)	(1,521)	(3,823)	(3,837)
Net income attributable to the partners	40,143	41,335	86,311	66,898
General partner interest in net income attributable to the Partnership, including incentive distributions	0	(18,328)	0	(35,466)
Limited partners’ interest in net income	$ 40,143	$ 23,007	$ 86,311	$ 31,432
Limited partners’ per unit interest in earnings—basic and diluted (in dollars per share)	$ 0.38	$ 0.36	$ 0.82	$ 0.49
Weighted average limited partners’ units outstanding (in shares)	105,429	64,086	104,637	63,602

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 41,499	$ 42,856	$ 90,134	$ 70,735
Other comprehensive income:
Change in fair value of cash flow hedging instruments	0	11	0	87
Reclassification adjustment to net income on partial settlement of cash flow hedge	0	(102)	0	(115)
Other comprehensive income	0	(91)	0	(28)
Comprehensive income before noncontrolling interest	41,499	42,765	90,134	70,707
Allocation of net comprehensive income to noncontrolling interests	(1,356)	(1,521)	(3,823)	(3,837)
Comprehensive income attributable to the partners	$ 40,143	$ 41,244	$ 86,311	$ 66,870

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities
Net income	$ 90,134	$ 70,735
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	49,750	38,722
(Gain) loss on sale of assets	(183)	(133)
Amortization of deferred charges	1,516	1,504
Equity-based compensation expense	1,550	1,109
Equity in earnings of equity method investments, net of distributions	228	594
Loss on early extinguishment of debt	0	12,225
(Increase) decrease in operating assets:
Accounts receivable – trade	(698)	(285)
Accounts receivable – affiliates	14,836	6,033
Prepaid and other current assets	(835)	(234)
Increase (decrease) in operating liabilities:
Accounts payable – trade	(1,428)	104
Accounts payable – affiliates	(3,546)	9,128
Accrued interest	(67)	(7,519)
Deferred revenue	3,700	1,653
Accrued property taxes	888	(1,001)
Other current liabilities	(2,023)	(442)
Other, net	49	(336)
Net cash provided by operating activities	160,963	113,601
Cash flows from investing activities
Additions to properties and equipment	(24,739)	(20,524)
Other Payments to Acquire Businesses	(6,831)	0
Proceeds from sale of assets	196	635
Distributions in excess of equity in earnings of equity investments	299	1,654
Net cash used for investing activities	(31,075)	(18,235)
Cash flows from financing activities
Borrowings under credit agreement	305,500	479,000
Repayments of credit agreement borrowings	(417,500)	(189,000)
Redemption of 6.5% Senior Notes	0	(309,750)
Proceeds from Issuance of common units	114,831	52,634
Distributions to HEP unitholders	(130,075)	(112,195)
Distributions to noncontrolling interests	(3,500)	(3,500)
Distribution to HFC for El Dorado tanks	0	(103)
Contributions from general partner	492	995
Units withheld for tax withholding obligations	(58)	(35)
Other	(698)	(730)
Net cash used by financing activities	(131,008)	(82,684)
Cash and cash equivalents
Increase (decrease) for the period	(1,120)	12,682
Beginning of period	7,776	3,657
End of period	$ 6,656	$ 16,339

Consolidated Statement of Equit

Consolidated Statement of Equity - 6 months ended Jun. 30, 2018 - USD ($) $ in Thousands	Total	Common Units	Noncontrolling Interest
Balance, Beginning of Period at Dec. 31, 2017	$ 485,065	$ 393,959	$ 91,106
Increase (Decrease) in Partners' Equity [Roll Forward]
Issuance of common units	114,900	114,900
Distributions to HEP unitholders	(130,075)	(130,075)
Distributions to noncontrolling interest	(3,500)		(3,500)
Amortization of restricted and performance units	1,550	1,550
Class B unit accretion	(1,459)	(1,459)
Cumulative transition adjustment for adoption of revenue recognition standard	1,320	1,320
Other	433	433
Net income	90,134	87,769	2,365
Balance, End of Period at Jun. 30, 2018	$ 558,368	$ 468,397	$ 89,971

Description of Business and Pre

Description of Business and Presentation of Financial Statements	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Description of Business and Presentation of Financial Statements	Description of Business and Presentation of Financial Statements Holly Energy Partners, L.P. (“HEP”), together with its consolidated subsidiaries, is a publicly held master limited partnership. As of June 30, 2018 , HollyFrontier Corporation (“HFC”) and its subsidiaries own a 57% limited partner interest and the non-economic general partner interest in HEP. We commenced operations on July 13, 2004, upon the completion of our initial public offering. In these consolidated financial statements, the words “we,” “our,” “ours” and “us” refer to HEP unless the context otherwise indicates. On October 31, 2017, we closed on an equity restructuring transaction with HEP Logistics Holdings, L.P. (“HEP Logistics”), a wholly-owned subsidiary of HFC and the general partner of HEP, pursuant to which the incentive distribution rights (“IDRs”) held by HEP Logistics were canceled, and HEP Logistics' 2% general partner interest in HEP was converted into a non-economic general partner interest in HEP. In consideration, we issued 37,250,000 of our common units to HEP Logistics. In addition, HEP Logistics agreed to waive $2.5 million of limited partner cash distributions for each of twelve consecutive quarters beginning with the first quarter the units issued as consideration were eligible to receive distributions. As a result of this transaction, no distributions were made on the general partner interest after October 31, 2017. On January 25, 2018, we entered into a common unit purchase agreement in which certain purchasers agreed to purchase in a private placement 3,700,000 common units representing limited partner interests, at a price of $29.73 per common unit. The private placement closed on February 6, 2018, and we received proceeds of approximately $110 million , which were used to repay indebtedness under our revolving credit facility. We own and operate petroleum product and crude oil pipelines, terminal, tankage and loading rack facilities and refinery processing units that support HFC’s refining and marketing operations in the Mid-Continent, Southwest and Northwest regions of the United States and Delek US Holdings, Inc.’s (“Delek”) refinery in Big Spring, Texas. Additionally, we own a 75% interest in UNEV Pipeline, LLC (“UNEV”), a 50% interest in the Osage Pipe Line Company, LLC (“Osage”) and a 50% interest in the Cheyenne Pipeline LLC. We operate in two reportable segments, a Pipelines and Terminals segment and a Refinery Processing Unit segment. Disclosures around these segments are discussed in Note 15. We generate revenues by charging tariffs for transporting petroleum products and crude oil through our pipelines, by charging fees for terminalling and storing refined products and other hydrocarbons, providing other services at our storage tanks and terminals and by charging fees for processing hydrocarbon feedstocks through our refinery processing units. We do not take ownership of products that we transport, terminal, store or process, and therefore, we are not exposed directly to changes in commodity prices. The consolidated financial statements included herein have been prepared without audit, pursuant to the rules and regulations of the United States Securities and Exchange Commission (the “SEC”). The interim financial statements reflect all adjustments, which, in the opinion of management, are necessary for a fair presentation of our results for the interim periods. Such adjustments are considered to be of a normal recurring nature. Although certain notes and other information required by U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted, we believe that the disclosures in these consolidated financial statements are adequate to make the information presented not misleading. These consolidated financial statements should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2017 . Results of operations for interim periods are not necessarily indicative of the results of operations that will be realized for the year ending December 31, 2018 . Principles of Consolidation and Common Control Transactions The consolidated financial statements include our accounts and those of subsidiaries and joint ventures that we control. All significant intercompany transactions and balances have been eliminated. Most of our acquisitions from HFC occurred while we were a consolidated variable interest entity (“VIE”) of HFC. Therefore, as an entity under common control with HFC, we recorded these acquisitions on our balance sheets at HFC's historical basis instead of our purchase price or fair value. Accounting Pronouncements Adopted During the Periods Presented Share-Based Compensation In March 2016, an accounting standard update was issued which simplifies the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures and statutory tax withholding requirements, as well as classification in the statement of cash flows. We adopted this standard effective January 1, 2017, with no impact to our financial condition or results of operations. The new standard also requires that employee taxes paid when an employer withholds units for tax withholding purposes be reported as financing activities in the statement of cash flows on a retrospective basis. Previously, this activity was included in our operating activities. The impact of this change for the six months ended June 30, 2017 was not material to our consolidated statement of cash flows. Finally, consistent with our existing policy, we have elected to account for forfeitures on an estimated basis. Revenue Recognition In May 2014, an accounting standard update was issued requiring revenue to be recognized when promised goods or services are transferred to customers in an amount that reflects the expected consideration for these goods or services. This standard had an effective date of January 1, 2018, and we accounted for the new guidance using the modified retrospective implementation method, whereby a cumulative effect adjustment was recorded to retained earnings as of the date of initial application. In preparing for adoption, we evaluated the terms, conditions and performance obligations under our existing contracts with customers. Furthermore, we implemented policies to comply with this new standard. See Note 3 for additional information on our revenue recognition policies. Business Combinations In December 2014, an accounting standard update was issued to provide new guidance on the definition of a business in relation to accounting for identifiable intangible assets in business combinations. This standard had an effective date of January 1, 2018, and had no effect on our financial condition, results of operations or cash flows. Financial Assets and Liabilities In January 2016, an accounting standard update was issued requiring changes in the accounting and disclosures for financial instruments. This standard was effective beginning with our 2018 reporting year and had no effect on our financial condition, results of operations or cash flows. Accounting Pronouncements Not Yet Adopted Leases In February 2016, an accounting standard update was issued requiring leases to be measured and recognized as a lease liability, with a corresponding right-of-use asset on the balance sheet. This standard has an effective date of January 1, 2019, and we are evaluating the impact of this standard. In preparing for adoption, we have identified, reviewed and evaluated contracts containing lease and embedded lease arrangements. Additionally, we have acquired software and are implementing systems to facilitate lease capture and related accounting treatment.

Acquisitions

Acquisitions	6 Months Ended
	Jun. 30, 2018
Business Combinations [Abstract]
Acquisitions	Acquisitions SLC Pipeline and Frontier Aspen On October 31, 2017, we acquired the remaining 75% interest in SLC Pipeline LLC (“SLC Pipeline”) and the remaining 50% interest in Frontier Aspen LLC (“Frontier Aspen”) from subsidiaries of Plains All American Pipeline, L,P. (“Plains”), for cash consideration of $250 million . Prior to this acquisition, we held noncontrolling interests of 25% of SLC Pipeline and 50% of Frontier Aspen. As a result of the acquisitions, SLC Pipeline and Frontier Aspen are wholly-owned subsidiaries of HEP. These acquisitions were accounted for as a business combination achieved in stages. Our pre-existing equity method investments in SLC Pipeline and Frontier Aspen were remeasured at an acquisition date fair value of $112 million since we now have a controlling interest, and we recognized a gain on the remeasurement in the fourth quarter of 2017 of $36.3 million . The fair value of our pre-existing equity method investments in SLC Pipeline and Frontier Aspen was estimated using Level 3 Inputs under the income method for these entities, adjusted for lack of control and marketability. The total consideration of $363.8 million , consisting of initial cash consideration of $250 million , working capital adjustments of $1.8 million and the fair value of our preexisting equity method investments in SLC Pipeline and Frontier Aspen of $112 million , was allocated to the acquisition date fair value of assets and liabilities acquired as of the October 31, 2017 acquisition date, with the excess purchase price recorded as goodwill. The following summarizes the value of assets and liabilities acquired: (in thousands) Cash and cash equivalents $ 4,609 Accounts receivable 5,164 Prepaid and other current assets 8 Properties and equipment 275,061 Intangible assets 70,182 Goodwill 13,845 Accounts payable (3,598 ) Accrued property taxes (1,438 ) Net assets acquired $ 363,833 SLC Pipeline is the owner of a 95-mile crude pipeline that transports crude oil into the Salt Lake City area from the Utah terminal of the Frontier Pipeline (defined below) and from Wahsatch Station. Frontier Aspen is the owner of a 289-mile crude pipeline from Casper, Wyoming to Frontier Station, Utah (the “Frontier Pipeline”) that supplies Canadian and Rocky Mountain crudes to Salt Lake City area refiners through a connection to the SLC Pipeline.

Revenues

Revenues	6 Months Ended
	Jun. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenues	Revenues Revenues are generally recognized as products are shipped through our pipelines and terminals, feedstocks are processed through our refinery processing units or other services are rendered. The majority of our contracts with customers meet the definition of a lease since (1) performance of the contracts is dependent on specified property, plant, or equipment and (2) it is remote that one or more parties other than the customer will take more than a minor amount of the output associated with the specified property, plant, or equipment. Therefore, we bifurcate the consideration received between lease and service revenue. The service component is within the scope of Accounting Standards Codification (“ASC”) 606, which largely codified ASU 2014-09. Several of our contracts include incentive or reduced tariffs once a certain quarterly volume is met. Revenue from the variable element of these transactions is recognized based on the actual volumes shipped as it relates specifically to rendering the services during the applicable quarter. We adopted the new revenue recognition standard (see Note 1) using the modified retrospective method, whereby the cumulative effect of applying the new standard was recorded as an adjustment to the opening balance of retained earnings as well as the carrying amounts of assets and liabilities as of January 1, 2018, which had no impact on our cash flows. The following table reflects the cumulative effect of adoption as of January 1, 2018: Prior to Adoption Increase (Decrease) As Adjusted (In millions) Deferred revenue $ 9,598 $ (1,320 ) $ 8,278 Partners’ equity: Common unitholders $ 393,959 $ 1,320 $ 395,279 The majority of our long-term transportation contracts specify minimum volume requirements, whereby, we bill a customer for a minimum level of shipments in the event a customer ships below their contractual requirements. If there are no future performance obligations, we will recognize these deficiency payments in revenue. In certain of these throughput agreements, a customer may later utilize such shortfall billings as credit towards future volume shipments in excess of its minimum levels within its respective contractual shortfall make-up period. Such amounts represent an obligation to perform future services, which may be initially deferred and later recognized as revenue based on estimated future shipping levels, including the likelihood of a customer’s ability to utilize such amounts prior to the end of the contractual shortfall make-up period. We recognize the service portion of these deficiency payments in revenue when we do not expect we will be required to satisfy these performance obligations in the future based on the pattern of rights exercised by the customer. During the three and six months ended June 30, 2018 , we recognized $3.4 million and $7.0 million , respectively, of these deficiency payments in revenue, of which $0.4 million and $2.6 million , respectively, related to deficiency payments billed in prior periods. As of June 30, 2018 , deferred revenue reflected in our consolidated balance sheet related to shortfalls billed was $4.4 million . June 30, January 1, (In thousands) Contract asset $ 1,562 $ — Contract liability $ (4,441 ) $ (2,713 ) The contract assets and liabilities include both lease and service components. We recognized $0.4 million and $2.6 million in revenue during the three and six months ended June 30, 2018 , respectively, that was previously included in contract liability as of January 1, 2018. As of June 30, 2018 , we expect to recognize $2.4 billion in revenue related to our unfulfilled performance obligations under the terms of our long-term throughput agreements and operating leases expiring in 2019 through 2036 . These agreements provide for changes in the minimum revenue guarantees annually for increases or decreases in the Producer Price Index (“PPI”) or Federal Energy Regulatory Commission (“FERC”) index, with certain contracts having provisions that limit the level of the rate increases or decreases. We expect to recognize revenue for these unfulfilled performance obligations as shown in the table below (amounts shown in table include both service and lease revenues): Years Ending December 31, (In millions) Remainder of 2018 $ 188 2019 352 2020 305 2021 294 2022 267 Thereafter 1,042 Total $ 2,448 Payment terms under our contracts with customers are consistent with industry norms and are typically payable within 10 to 30 days of the date of invoice. Disaggregated revenues are as follows: Three Months Ended Six Months Ended 2018 2017 2018 2017 (In thousands) Pipelines $ 65,539 $ 55,248 $ 137,708 $ 107,695 Terminals, tanks and loading racks 34,386 36,356 72,567 70,163 Refinery processing units 18,835 17,539 37,369 36,919 $ 118,760 $ 109,143 $ 247,644 $ 214,777 During the three and six months ended June 30, 2018 , lease revenues amounted to $68.1 million and $138.7 million , respectively, and service revenues amounted to $50.7 million and $109.0 million , respectively. Both of these revenues were recorded within affiliates and third parties revenues on our consolidated statement of income.

Financial Instruments

Financial Instruments	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Financial Instruments	Financial Instruments Our financial instruments consist of cash and cash equivalents, accounts receivable, accounts payable, debt and interest rate swaps. The carrying amounts of cash equivalents, accounts receivable and accounts payable approximate fair value due to the short-term maturity of these instruments. Debt consists of outstanding principal under our revolving credit agreement (which approximates fair value as interest rates are reset frequently at current interest rates) and our fixed interest rate senior notes. Fair value measurements are derived using inputs (assumptions that market participants would use in pricing an asset or liability) including assumptions about risk. GAAP categorizes inputs used in fair value measurements into three broad levels as follows: • (Level 1) Quoted prices in active markets for identical assets or liabilities. • (Level 2) Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets, similar assets and liabilities in markets that are not active or can be corroborated by observable market data. • (Level 3) Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. This includes valuation techniques that involve significant unobservable inputs. The carrying amounts and estimated fair values of our senior notes were as follows: June 30, 2018 December 31, 2017 Financial Instrument Fair Value Input Level Carrying Value Fair Value Carrying Value Fair Value (In thousands) Liabilities: 6% Senior notes Level 2 495,599 507,025 495,308 525,120 $ 495,599 $ 507,025 $ 495,308 $ 525,120 Level 2 Financial Instruments Our senior notes are measured at fair value using Level 2 inputs. The fair value of the senior notes is based on market values provided by a third-party bank, which were derived using market quotes for similar type debt instruments. See Note 8 for additional information.

Properties and Equipment

Properties and Equipment	6 Months Ended
	Jun. 30, 2018
Property, Plant and Equipment [Abstract]
Properties and Equipment	Properties and Equipment The carrying amounts of our properties and equipment are as follows: June 30, December 31, (In thousands) Pipelines, terminals and tankage $ 1,525,033 $ 1,541,722 Refinery assets 347,338 347,338 Land and right of way 85,960 86,484 Construction in progress 42,811 12,029 Other 40,420 35,659 2,041,562 2,023,232 Less accumulated depreciation 489,853 453,761 $ 1,551,709 $ 1,569,471 We capitalized $0.2 million and $0.4 million during the six months ended June 30, 2018 and 2017 , respectively, in interest attributable to construction projects. Depreciation expense was $41.9 million and $34.9 million for the six months ended June 30, 2018 and 2017 , respectively, and includes depreciation of assets acquired under capital leases.

Intangible Assets

Intangible Assets	6 Months Ended
	Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible Assets Intangible assets include transportation agreements and customer relationships that represent a portion of the total purchase price of certain assets acquired from Delek in 2005 , from HFC in 2008 prior to HEP becoming a consolidated VIE of HFC and from Plains in 2017. The carrying amounts of our intangible assets are as follows: Useful Life June 30, December 31, (In thousands) Delek transportation agreement 30 years $ 59,933 $ 59,933 HFC transportation agreement 10-15 years 75,131 75,131 Customer relationships 10 years 69,282 69,282 Other 50 50 204,396 204,396 Less accumulated amortization 82,461 74,933 $ 121,935 $ 129,463 Amortization expense was $7.5 million and $3.5 million for the six months ended June 30, 2018 and 2017 , respectively. We estimate amortization expense to be $14.0 million for each of the next four years and $9.8 million in 2023. We have additional transportation agreements with HFC resulting from historical transactions consisting of pipeline, terminal and tankage assets contributed to us or acquired from HFC. These transactions occurred while we were a consolidated VIE of HFC; therefore, our basis in these agreements is zero and does not reflect a step-up in basis to fair value.

Employees, Retirement and Incen

Employees, Retirement and Incentive Plans	6 Months Ended
	Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Employees, Retirement and Incentive Plans	Employees, Retirement and Incentive Plans Direct support for our operations is provided by Holly Logistic Services, L.L.C. (“HLS”), an HFC subsidiary, which utilizes personnel employed by HFC who are dedicated to performing services for us. Their costs, including salaries, bonuses, payroll taxes, benefits and other direct costs, are charged to us monthly in accordance with an omnibus agreement that we have with HFC. These employees participate in the retirement and benefit plans of HFC. Our share of retirement and benefit plan costs was $1.6 million and $1.3 million for the three months ended June 30, 2018 and 2017 , respectively, and $3.4 million and $3.0 million for the six months ended June 30, 2018 and 2017 , respectively. Under HLS’s secondment agreement with HFC (the “Secondment Agreement”), certain employees of HFC are seconded to HLS to provide operational and maintenance services for certain of our processing, refining, pipeline and tankage assets, and HLS reimburses HFC for its prorated portion of the wages, benefits, and other costs related to these employees. We have a Long-Term Incentive Plan for employees and non-employee directors who perform services for us. The Long-Term Incentive Plan consists of four components: restricted or phantom units, performance units, unit options and unit appreciation rights. Our accounting policy for the recognition of compensation expense for awards with pro-rata vesting (a significant proportion of our awards) is to expense the costs ratably over the vesting periods. As of June 30, 2018 , we had two types of incentive-based awards outstanding, which are described below. The compensation cost charged against income was $0.7 million and $0.6 million for the three months ended June 30, 2018 and 2017 , respectively, and $1.5 million and $0.9 million for the six months ended June 30, 2018 and 2017 , respectively. We currently purchase units in the open market instead of issuing new units for settlement of all unit awards under our Long-Term Incentive Plan. As of June 30, 2018 , 2,500,000 units were authorized to be granted under our Long-Term Incentive Plan, of which 1,323,787 have not yet been granted, assuming no forfeitures of the unvested units and full achievement of goals for the unvested performance units. Restricted and Phantom Units Under our Long-Term Incentive Plan, we grant restricted units to non-employee directors and phantom units to selected employees who perform services for us, with most awards vesting over a period of one to three years. We previously granted restricted units to selected employees who perform services for us, which vest over a period of three years. Although full ownership of the units does not transfer to the recipients until the units vest, the recipients have distribution rights on these units from the date of grant, and the recipients of the restricted units have voting rights on the restricted units from the date of grant. The fair value of each restricted or phantom unit award is measured at the market price as of the date of grant and is amortized on a straight-line basis over the requisite service period for each separately vesting portion of the award. A summary of restricted and phantom unit activity and changes during the six months ended June 30, 2018 , is presented below: Restricted and Phantom Units Units Weighted Average Grant-Date Fair Value Outstanding at January 1, 2018 (nonvested) 119,009 $ 34.77 Granted 12,890 30.23 Forfeited (698 ) 34.59 Outstanding at June 30, 2018 (nonvested) 131,201 $ 34.33 No restricted units were vested and transferred to recipients during the six months ended June 30, 2018 . As of June 30, 2018 , there was $1.8 million of total unrecognized compensation expense related to unvested restricted and phantom unit grants, which is expected to be recognized over a weighted-average period of 1.2 years. Performance Units Under our Long-Term Incentive Plan, we grant performance units to selected officers who perform services for us. Performance units granted are payable in common units at the end of a three-year performance period based upon the growth in our distributable cash flow per common unit over the performance period. As of June 30, 2018 , estimated unit payouts for outstanding nonvested performance unit awards ranged between 100% and 150% of the target number of performance units granted. We granted 2,764 performance units during the six months ended June 30, 2018 . Performance units granted in 2017 and 2018 vest over a three-year performance period ending December 31, 2020 and 2021, respectively, and are payable in HEP common units. The number of units actually earned will be based on the growth of our distributable cash flow per common unit over the performance period, and can range from 50% to 150% of the target number of performance units granted. Although common units are not transferred to the recipients until the performance units vest, the recipients have distribution rights with respect to the common units from the date of grant. A summary of performance unit activity and changes for the six months ended June 30, 2018 , is presented below: Performance Units Units Outstanding at January 1, 2018 (nonvested) 36,911 Granted 2,764 Vesting and transfer of common units to recipients (4,283 ) Outstanding at June 30, 2018 (nonvested) 35,392 The grant date fair value of performance units vested and transferred to recipients during both the six months ended June 30, 2018 and 2017 was $0.1 million . Based on the weighted-average fair value of performance units outstanding at June 30, 2018 , of $1.2 million , there was $0.7 million of total unrecognized compensation expense related to nonvested performance units, which is expected to be recognized over a weighted-average period of 1.6 years. During the six months ended June 30, 2018 , we did not purchase any common units in the open market for the issuance and settlement of unit awards under our Long-Term Incentive Plan.

Debt

Debt	6 Months Ended
	Jun. 30, 2018
Debt Instruments [Abstract]
Debt	Debt Credit Agreement We have a $1.4 billion senior secured revolving credit facility (the “Credit Agreement”) expiring in July 2022 . The Credit Agreement is available to fund capital expenditures, investments, acquisitions, distribution payments and working capital and for general partnership purposes. The Credit Agreement is also available to fund letters of credit up to a $50 million sub-limit, and it contains an accordion feature giving us the ability to increase the size of the facility by up to $300 million with additional lender commitments. Our obligations under the Credit Agreement are collateralized by substantially all of our assets, and indebtedness under the Credit Agreement is guaranteed by our material, wholly-owned subsidiaries. The Credit Agreement requires us to maintain compliance with certain financial covenants consisting of total leverage, senior secured leverage, and interest coverage. It also limits or restricts our ability to engage in certain activities. If, at any time prior to the expiration of the Credit Agreement, HEP obtains two investment grade credit ratings, the Credit Agreement will become unsecured and many of the covenants, limitations, and restrictions will be eliminated. We may prepay all loans at any time without penalty, except for tranche breakage costs. If an event of default exists under the Credit Agreement, the lenders will be able to accelerate the maturity of all loans outstanding and exercise other rights and remedies. We were in compliance with the covenants as of June 30, 2018 . Senior Notes On July 19, 2016, we closed a private placement of $400 million in aggregate principal amount of 6% senior unsecured notes due in 2024 (the “ 6% Senior Notes”). On September 22, 2017, we closed a private placement of an additional $100 million in aggregate principal amount of the 6% Senior Notes for a combined aggregate principal amount outstanding of $500 million maturing in 2024 . The 6% Senior Notes are unsecured and impose certain restrictive covenants, including limitations on our ability to incur additional indebtedness, make investments, sell assets, incur certain liens, pay distributions, enter into transactions with affiliates and enter into mergers. We were in compliance with the restrictive covenants for the 6% Senior Notes as of June 30, 2018 . At any time when the 6% Senior Notes are rated investment grade by both Moody’s and Standard & Poor’s and no default or event of default exists, we will not be subject to many of the foregoing covenants. Additionally, we have certain redemption rights at varying premiums over face value under the 6% Senior Notes. Indebtedness under the 6% Senior Notes is guaranteed by our wholly-owned subsidiaries. On January 4, 2017, we redeemed the $300 million aggregate principal amount of 6.5% senior notes due in 2020 (the “6.5% Senior Notes”) at a redemption cost of $309.8 million at which time we recognized a $12.2 million early extinguishment loss consisting of a $9.8 million debt redemption premium and unamortized discount and financing costs of $2.4 million . We funded the redemption with borrowings under our Credit Agreement. Long-term Debt The carrying amounts of our long-term debt are as follows: June 30, December 31, (In thousands) Credit Agreement Amount outstanding $ 900,000 $ 1,012,000 6% Senior Notes Principal 500,000 500,000 Unamortized premium and debt issuance costs (4,401 ) (4,692 ) 495,599 495,308 Total long-term debt $ 1,395,599 $ 1,507,308 Interest Rate Risk Management The two interest rate swaps that hedged our exposure to the cash flow risk caused by the effects of LIBOR changes on $150 million of Credit Agreement advances matured on July 31, 2017. The swaps had effectively converted $150 million of our LIBOR based debt to fixed rate debt. Interest Expense and Other Debt Information Interest expense consists of the following components: Six Months Ended June 30, 2018 2017 (In thousands) Interest on outstanding debt: Credit Agreement, net of interest on interest rate swaps $ 17,850 $ 13,299 6.5% Senior Notes — 162 6% Senior Notes 15,000 12,000 Amortization of discount and deferred debt issuance costs 1,516 1,536 Commitment fees and other 1,007 720 Total interest incurred 35,373 27,717 Less capitalized interest 166 430 Net interest expense $ 35,207 $ 27,287 Cash paid for interest $ 33,935 $ 33,700 Capital Lease Obligations We have capital lease obligations related to vehicle leases with initial terms of 33 to 48 months. The total cost of assets under capital leases was $5.7 million and $5.1 million as of June 30, 2018 and December 31, 2017 , respectively, with accumulated depreciation of $3.7 million and $3.3 million as of June 30, 2018 and December 31, 2017 , respectively. We include depreciation of capital leases in depreciation and amortization in our consolidated statements of income.

Significant Customers

Significant Customers	6 Months Ended
	Jun. 30, 2018
Risks and Uncertainties [Abstract]
Significant Customers	Significant Customers All revenues are domestic revenues, of which 86% are currently generated from our two largest customers: HFC and Delek. The following table presents the percentage of total revenues generated by each of these customers: Three Months Ended Six Months Ended 2018 2017 2018 2017 HFC 79 % 85 % 79 % 85 % Delek 7 % 6 % 6 % 7 %

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions We serve HFC’s refineries under long-term pipeline, terminal and tankage throughput agreements, and refinery processing unit tolling agreements expiring from 2019 to 2036 . Under these agreements, HFC agrees to transport, store and process throughput volumes of refined product, crude oil and feedstocks on our pipelines, terminals, tankage, loading rack facilities and refinery processing units that result in minimum annual payments to us. These minimum annual payments or revenues are subject to annual rate adjustments on July 1st each year generally based on increases or decreases in PPI or the FERC index. As of June 30, 2018 , these agreements with HFC require minimum annualized payments to us of $334.5 million . If HFC fails to meet its minimum volume commitments under the agreements in any quarter, it will be required to pay us the amount of any shortfall in cash by the last day of the month following the end of the quarter. Under certain of these agreements, a shortfall payment may be applied as a credit in the following four quarters after its minimum obligations are met. Under certain provisions of an omnibus agreement we have with HFC (the “Omnibus Agreement”), we pay HFC an annual administrative fee (currently $2.5 million ) for the provision by HFC or its affiliates of various general and administrative services to us. This fee does not include the salaries of personnel employed by HFC who perform services for us on behalf of HLS or the cost of their employee benefits, which are charged to us separately by HFC. Also, we reimburse HFC and its affiliates for direct expenses they incur on our behalf. Related party transactions with HFC are as follows: • Revenues received from HFC were $94.0 million and $93.2 million for the three months ended June 30, 2018 and 2017 , respectively, and $195.4 million and $182.2 million for the six months ended June 30, 2018 and 2017 , respectively. • HFC charged us general and administrative services under the Omnibus Agreement of $0.6 million for each of the three months ended June 30, 2018 and 2017 , and $1.2 million for the six months ended June 30, 2018 and 2017 . • We reimbursed HFC for costs of employees supporting our operations of $12.5 million and $11.4 million for the three months ended June 30, 2018 and 2017 , respectively, and $25.2 million and $22.9 million for the six months ended June 30, 2018 and 2017 , respectively. • HFC reimbursed us $2.9 million and $1.5 million for the three months ended June 30, 2018 and 2017 , respectively, for expense and capital projects and $4.2 million and $2.8 million for the six months ended June 30, 2018 and 2017 , respectively. • We distributed $36.6 million and $72.8 million in the three and six months ended June 30, 2018 , respectively, to HFC as regular distributions on its common units and $32.6 million and $63.9 million on its common units and general partner interest, including general partner incentive distributions, in the three and six months ended June 30, 2017 , respectively. • Accounts receivable from HFC were $36.7 million and $51.5 million at June 30, 2018 , and December 31, 2017 , respectively. • Accounts payable to HFC were $11.3 million and $7.7 million at June 30, 2018 , and December 31, 2017 , respectively. • Deferred revenue in the consolidated balance sheets at June 30, 2018 and December 31, 2017 , includes $1.7 million and $4.4 million , respectively, relating to certain shortfall billings to HFC. It is possible that HFC may not exceed its minimum obligations to receive credit for any of the $1.7 million deferred at June 30, 2018 . • We received lease payments from HFC for use of our Artesia and Tulsa railyards of $0.5 million and $0.1 million for the three months ended June 30, 2018 and 2017 , respectively, and $1.0 million and $0.2 million for the six months ended June 30, 2018 and 2017 , respectively. • On October 31, 2017, we closed on an equity restructuring transaction with HEP Logistics, a wholly-owned subsidiary of HFC and the general partner of HEP, pursuant to which the incentive distribution rights held by HEP Logistics were canceled, and HEP Logistics' 2% general partner interest in HEP was converted into a non-economic general partner interest in HEP. In consideration, we issued 37,250,000 of our common units to HEP Logistics. In addition, HEP Logistics agreed to waive $2.5 million of limited partner cash distributions for each of twelve consecutive quarters beginning with the first quarter the units issued as consideration were eligible to receive distributions.

Partners' Equity, Income Alloca

Partners' Equity, Income Allocations and Cash Distributions	6 Months Ended
	Jun. 30, 2018
Partners' Capital [Abstract]
Partners' Equity, Income Allocations and Cash Distributions	Partners’ Equity, Income Allocations and Cash Distributions As of June 30, 2018 , HFC held 59,630,030 of our common units, constituting a 57% limited partner interest in us, and held the non-economic general partner interest. Additionally, HEP Logistics, our general partner, owned all incentive distribution rights through October 31, 2017, at which time we closed on an equity restructuring transaction with HEP Logistics pursuant to which the incentive distribution rights were canceled. See Note 1 for a description of this equity restructuring transaction. On January 25, 2018, we entered into a common unit purchase agreement in which certain purchasers agreed to purchase in a private placement 3,700,000 common units representing limited partnership interests, at a price of $29.73 per common unit. The private placement closed on February 6, 2018, and we received proceeds of approximately $110 million , which were used to repay indebtedness under our Credit Agreement. Continuous Offering Program We have a continuous offering program under which we may issue and sell common units from time to time, representing limited partner interests, up to an aggregate gross sales amount of $200 million . For the six months ended June 30, 2018 , HEP issued 171,246 units under this program, providing approximately $5.2 million in gross proceeds. As of June 30, 2018 , HEP has issued 2,413,153 units under this program, providing $82.3 million in gross proceeds. We intend to use our net proceeds for general partnership purposes, which may include funding working capital, repayment of debt, acquisitions and capital expenditures. Amounts repaid under our credit facility may be reborrowed from time to time. Allocations of Net Income Net income attributable to HEP is allocated to the partners based on their weighted-average ownership percentage during the period. Prior to the equity restructuring of the general partner interest owned by HEP Logistics described in Note 1 that occurred on October 31, 2017, net income attributable to HEP was allocated between limited partners and the general partner interest in accordance with the provisions of the partnership agreement. HEP net income allocated to the general partner included incentive distributions that were declared subsequent to quarter end. After incentive distributions and other priority allocations were allocated to the general partner, the remaining net income attributable to HEP was allocated to the partners based on their weighted-average ownership percentage during the period. The following table presents the allocation of the general partner interest in net income for the periods presented below: Three Months Ended Six Months Ended 2018 2017 2018 2017 (In thousands) General partner interest in net income $ — $ 827 $ — $ 1,338 General partner incentive distribution — 17,501 — 34,128 Total general partner interest in net income $ — $ 18,328 $ — $ 35,466 Cash Distributions On July 19, 2018 , we announced our cash distribution for the second quarter of 2018 of $0.66 per unit. The distribution is payable on all common units and will be paid August 9, 2018 , to all unitholders of record on July 30, 2018 . However, HEP Logistics will waive $2.5 million in limited partner cash distributions in accordance with the equity restructuring discussed in Note 1. Prior to the equity restructuring of the general partner interest owned by HEP Logistics that occurred on October 31, 2017, our general partner, HEP Logistics, was entitled to incentive distributions if the amount we distributed with respect to any quarter exceeded specified target levels. After the restructuring of the general partner interest, the general partner interest was no longer entitled to any distributions. The following table presents the allocation of our regular quarterly cash distributions to the general and limited partners for the periods in which they apply. Our distributions are declared subsequent to quarter end; therefore, the amounts presented do not reflect distributions paid during the periods presented below. Three Months Ended Six Months Ended 2018 2017 2018 2017 (In thousands, except per unit data) General partner interest in distribution $ — $ 1,188 $ — $ 2,336 General partner incentive distribution — 17,501 — 34,128 Total general partner distribution — 18,689 — 36,464 Limited partner distribution 67,091 40,682 133,670 80,314 Total regular quarterly cash distribution $ 67,091 $ 59,371 $ 133,670 $ 116,778 Cash distribution per unit applicable to limited partners $ 0.6600 $ 0.6325 $ 1.3150 $ 1.2525 As a master limited partnership, we distribute our available cash, which historically has exceeded our net income attributable to HEP because depreciation and amortization expense represents a non-cash charge against income. The result is a decline in our partners’ equity since our regular quarterly distributions have exceeded our quarterly net income attributable to HEP. Additionally, if the asset contributions and acquisitions from HFC had occurred while we were not a consolidated variable interest entity of HFC, our acquisition cost, in excess of HFC’s historical basis in the transferred assets, would have been recorded in our financial statements at the time of acquisition as increases to our properties and equipment and intangible assets instead of decreases to our partners’ equity.

Net Income per Limited Partner

Net Income per Limited Partner Unit	6 Months Ended
	Jun. 30, 2018
Net Income per Limited Partner Unit [Abstract]
Net Income Per Limited Partner Unit	Net Income Per Limited Partner Unit Net income per unit applicable to the limited partners is computed using the two-class method, since we have more than one participating security (common units and restricted units). Prior to the equity restructuring transaction described in Note 1, which was effective October 31, 2017, we had participating securities which included the aforementioned common units and restricted units as well as general partner units and IDRs. After the equity restructuring, the general partner interest was no longer entitled to any distributions, and none were made on the general partner interest after October 31, 2017. To the extent net income attributable to the partners exceeds or is less than cash distributions, this difference is allocated to the partners based on their weighted-average ownership percentage during the period, after consideration of any priority allocations of earnings. Our dilutive securities, restricted units, are immaterial for all periods presented. For purposes of applying the two-class method, including the allocation of cash distributions in excess of earnings, net income per limited partner unit is computed as follows: Three Months Ended Six Months Ended 2018 2017 2018 2017 (In thousands) Net income attributable to the partners $ 40,143 $ 41,335 $ 86,311 $ 66,898 Less: General partner’s distribution declared (including IDRs) — (18,689 ) — (36,464 ) Limited partner’s distribution declared on common units (67,091 ) (40,682 ) (133,670 ) (80,314 ) Distributions in excess of net income attributable to the partners $ (26,948 ) $ (18,036 ) $ (47,359 ) $ (49,880 ) General Partner (including IDRs) Limited Partners’ Common Units Total (In thousands, except per unit data) Three Months Ended June 30, 2018 Net income attributable to the partners: Distributions declared $ — $ 67,091 $ 67,091 Distributions in excess of net income attributable to the partners — (26,948 ) (26,948 ) Net income attributable to the partners $ — $ 40,143 $ 40,143 Weighted average limited partners' units outstanding 105,429 Limited partners' per unit interest in earnings - basic and diluted $ 0.38 Three Months Ended June 30, 2017 Net income attributable to the partners: Distributions declared $ 18,689 $ 40,682 $ 59,371 Distributions in excess of net income attributable to the partners (361 ) (17,675 ) (18,036 ) Net income attributable to the partners $ 18,328 $ 23,007 $ 41,335 Weighted average limited partners' units outstanding 64,086 Limited partners' per unit interest in earnings - basic and diluted $ 0.36 General Partner (including IDRs) Limited Partners’ Common Units Total (In thousands, except per unit data) Six Months Ended June 30, 2018 Net income attributable to partnership: Distributions declared $ — $ 133,670 $ 133,670 Distributions in excess of net income attributable to partnership — (47,359 ) (47,359 ) Net income attributable to partnership $ — $ 86,311 $ 86,311 Weighted average limited partners' units outstanding 104,637 Limited partners' per unit interest in earnings - basic and diluted $ 0.82 Six Months Ended June 30, 2017 Net income attributable to partnership: Distributions declared $ 36,464 $ 80,314 $ 116,778 Distributions in excess of net income attributable to partnership (998 ) (48,882 ) (49,880 ) Net income attributable to partnership $ 35,466 $ 31,432 $ 66,898 Weighted average limited partners' units outstanding 63,602 Limited partners' per unit interest in earnings - basic and diluted $ 0.49

Environmental

Environmental	6 Months Ended
	Jun. 30, 2018
Accrual for Environmental Loss Contingencies [Abstract]
Environmental	Environmental We expensed $0.3 million for the three and the six months ended June 30, 2018 , for environmental remediation obligations, and we incurred no expenses for the three and six months ended June 30, 2017. The accrued environmental liability, net of expected recoveries from indemnifying parties, reflected in our consolidated balance sheets was $6.3 million and $6.5 million at June 30, 2018 and December 31, 2017 , respectively, of which $4.7 million and $5.0 million , respectively, were classified as other long-term liabilities. These accruals include remediation and monitoring costs expected to be incurred over an extended period of time. Under the Omnibus Agreement and certain transportation agreements and purchase agreements with HFC, HFC has agreed to indemnify us, subject to certain monetary and time limitations, for environmental noncompliance and remediation liabilities associated with certain assets transferred to us from HFC and occurring or existing prior to the date of such transfers. As of June 30, 2018 and December 31, 2017 , our consolidated balance sheets included additional accrued environmental liabilities of $0.7 million and $0.8 million , respectively, for HFC indemnified liabilities, and other assets included equal and offsetting balances representing amounts due from HFC related to indemnifications for environmental remediation liabilities.

Contingencies

Contingencies	6 Months Ended
	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies We are a party to various legal and regulatory proceedings, none of which we believe will have a material adverse impact on our financial condition, results of operations or cash flows.

Operating Segments

Operating Segments	6 Months Ended
	Jun. 30, 2018
Segment Reporting [Abstract]
Operating Segments	Operating Segments Although financial information is reviewed by our chief operating decision makers from a variety of perspectives, they view the business in two operating segments: pipelines and terminals, and refinery processing units. These operating segments adhere to the accounting polices used for our consolidated financial statements. The pipelines and terminals segment has been aggregated as both pipeline and terminals (1) have similar economic characteristics,(2) similarly provide logistics services of transportation and storage of petroleum products, (3) similarly support the petroleum refining business, including distribution of its products, (4) have principally the same customers and (5) are subject to similar regulatory requirements. We evaluate the performance of each segment based on its respective operating income. Certain general and administrative expenses and interest and financing costs are excluded from segment operating income as they are not directly attributable to a specific operating segment. Identifiable assets are those used by the segment, whereas other assets are principally equity method investments, cash, deposits and other assets that are not associated with a specific reportable operating segment. Three Months Ended Six Months Ended 2018 2017 2018 2017 Revenues: Pipelines and terminals - affiliate $ 75,178 $ 75,613 $ 158,072 $ 145,258 Pipelines and terminals - third-party 24,747 15,991 52,203 32,600 Refinery processing units - affiliate 18,835 17,539 37,369 36,919 Total segment revenues $ 118,760 $ 109,143 $ 247,644 $ 214,777 Segment operating income: Pipelines and terminals $ 51,004 $ 49,164 $ 111,217 $ 95,649 Refinery processing units 8,615 5,937 15,942 13,820 Total segment operating income 59,619 55,101 127,159 109,469 Unallocated general and administrative expenses (2,673 ) (2,615 ) (5,795 ) (5,249 ) Interest and financing costs, net (17,100 ) (13,645 ) (34,166 ) (39,307 ) Equity in earnings of unconsolidated affiliates 1,734 4,053 3,013 5,893 Gain (loss) on sale of assets and other (53 ) 89 33 162 Income before income taxes $ 41,527 $ 42,983 $ 90,244 $ 70,968 Capital Expenditures: Pipelines and terminals $ 12,127 $ 12,157 $ 24,739 $ 20,286 Refinery processing units — 102 — 238 Total capital expenditures $ 12,127 $ 12,259 $ 24,739 $ 20,524 June 30, 2018 December 31, 2017 (in thousands) Identifiable assets: Pipelines and terminals (1) $ 1,697,531 $ 1,728,074 Refinery processing units 321,191 328,585 Other 97,341 97,455 Total identifiable assets $ 2,116,063 $ 2,154,114 (1) Includes goodwill of $270.3 million and $266.7 million as of June 30, 2018 and December 31, 2017 , respectively.

Supplemental Guarantor _ Non-Gu

Supplemental Guarantor / Non-Guarantor Financial Information	6 Months Ended
	Jun. 30, 2018
Supplemental Guarantor / Non-Guarantor Financial Information [Abstract]
Supplemental Guarantor / Non-Guarantor Financial Information	Supplemental Guarantor/Non-Guarantor Financial Information Obligations of HEP (“Parent”) under the 6% Senior Notes have been jointly and severally guaranteed by each of its direct and indirect 100% owned subsidiaries (“Guarantor Subsidiaries”). These guarantees are full and unconditional, subject to certain customary release provisions. These circumstances include (i) when a Guarantor Subsidiary is sold or sells all or substantially all of its assets, (ii) when a Guarantor Subsidiary is declared “unrestricted” for covenant purposes, (iii) when a Guarantor Subsidiary’s guarantee of other indebtedness is terminated or released and (iv) when the requirements for legal defeasance or covenant defeasance or to discharge the senior notes have been satisfied. The following financial information presents condensed consolidating balance sheets, statements of comprehensive income, and statements of cash flows of the Parent, the Guarantor Subsidiaries and the Non-Guarantor Subsidiaries. The information has been presented as if the Parent accounted for its ownership in the Guarantor Subsidiaries, and the Guarantor Restricted Subsidiaries accounted for the ownership of the Non-Guarantor Non-Restricted Subsidiaries, using the equity method of accounting. Condensed Consolidating Balance Sheet June 30, 2018 Parent Guarantor Restricted Subsidiaries Non-Guarantor Non-Restricted Subsidiaries Eliminations Consolidated (In thousands) ASSETS Current assets: Cash and cash equivalents $ 2 $ 640 $ 6,014 $ — $ 6,656 Accounts receivable — 45,447 5,305 (586 ) 50,166 Prepaid and other current assets 156 2,629 361 — 3,146 Total current assets 158 48,716 11,680 (586 ) 59,968 Properties and equipment, net — 1,197,968 353,741 — 1,551,709 Investment in subsidiaries 1,866,892 269,911 — (2,136,803 ) — Intangible assets, net — 121,935 — — 121,935 Goodwill — 270,336 — — 270,336 Equity method investments — 84,752 — — 84,752 Other assets 10,483 16,880 — — 27,363 Total assets $ 1,877,533 $ 2,010,498 $ 365,421 $ (2,137,389 ) $ 2,116,063 LIABILITIES AND EQUITY Current liabilities: Accounts payable $ — $ 19,284 $ 1,700 $ (586 ) $ 20,398 Accrued interest 13,189 — — — 13,189 Deferred revenue — 9,675 1,170 — 10,845 Accrued property taxes — 3,077 2,463 — 5,540 Other current liabilities 88 3,505 — — 3,593 Total current liabilities 13,277 35,541 5,333 (586 ) 53,565 Long-term debt 1,395,599 — — — 1,395,599 Other long-term liabilities 260 15,060 206 — 15,526 Deferred revenue — 48,405 — — 48,405 Class B unit — 44,600 — — 44,600 Equity - partners 468,397 1,866,892 269,911 (2,136,803 ) 468,397 Equity - noncontrolling interest — — 89,971 — 89,971 Total liabilities and equity $ 1,877,533 $ 2,010,498 $ 365,421 $ (2,137,389 ) $ 2,116,063 Condensed Consolidating Balance Sheet December 31, 2017 Parent Guarantor Restricted Subsidiaries Non-Guarantor Non-Restricted Subsidiaries Eliminations Consolidated (In thousands) ASSETS Current assets: Cash and cash equivalents $ 2 $ 511 $ 7,263 $ — $ 7,776 Accounts receivable — 59,448 5,038 (182 ) 64,304 Prepaid and other current assets 13 2,016 282 — 2,311 Total current assets 15 61,975 12,583 (182 ) 74,391 Properties and equipment, net — 1,213,626 355,845 — 1,569,471 Investment in subsidiaries 1,902,285 273,319 — (2,175,604 ) — Intangible assets, net — 129,463 — — 129,463 Goodwill — 266,716 — — 266,716 Equity method investments — 85,279 — — 85,279 Other assets 11,753 17,041 — — 28,794 Total assets $ 1,914,053 $ 2,047,419 $ 368,428 $ (2,175,786 ) $ 2,154,114 LIABILITIES AND EQUITY Current liabilities: Accounts payable $ — $ 20,928 $ 1,526 $ (182 ) $ 22,272 Accrued interest 12,500 756 — — 13,256 Deferred revenue — 8,540 1,058 — 9,598 Accrued property taxes — 3,431 1,221 — 4,652 Other current liabilities — 5,707 — — 5,707 Total current liabilities 12,500 39,362 3,805 (182 ) 55,485 Long-term debt 1,507,308 — — — 1,507,308 Other long-term liabilities 286 15,359 198 — 15,843 Deferred revenue — 47,272 — — 47,272 Class B unit — 43,141 — — 43,141 Equity - partners 393,959 1,902,285 273,319 (2,175,604 ) 393,959 Equity - noncontrolling interest — — 91,106 — 91,106 Total liabilities and equity $ 1,914,053 $ 2,047,419 $ 368,428 $ (2,175,786 ) $ 2,154,114 Condensed Consolidating Statement of Comprehensive Income Three Months Ended June 30, 2018 Parent Guarantor Restricted Subsidiaries Non-Guarantor Non-restricted Subsidiaries Eliminations Consolidated (In thousands) Revenues: Affiliates $ — $ 89,522 $ 4,491 $ — $ 94,013 Third parties — 19,540 5,207 — 24,747 — 109,062 9,698 — 118,760 Operating costs and expenses: Operations (exclusive of depreciation and amortization) — 31,494 3,039 — 34,533 Depreciation and amortization 20,431 4,177 — 24,608 General and administrative 761 1,912 — — 2,673 761 53,837 7,216 — 61,814 Operating income (loss) (761 ) 55,225 2,482 — 56,946 Other income (expense): Equity in earnings of subsidiaries 58,566 1,881 — (60,447 ) — Equity in earnings of equity method investments — 1,734 — — 1,734 Interest expense (17,662 ) 36 — — (17,626 ) Interest income — 526 — — 526 Gain on sale of assets and other — (79 ) 26 — (53 ) 40,904 4,098 26 (60,447 ) (15,419 ) Income before income taxes 40,143 59,323 2,508 (60,447 ) 41,527 State income tax expense — (28 ) — — (28 ) Net income 40,143 59,295 2,508 (60,447 ) 41,499 Allocation of net income attributable to noncontrolling interests — (729 ) (627 ) — (1,356 ) Net income attributable to the partners 40,143 58,566 1,881 (60,447 ) 40,143 Other comprehensive income — — — — — Comprehensive income attributable to the partners $ 40,143 $ 58,566 $ 1,881 $ (60,447 ) $ 40,143 Condensed Consolidating Statement of Comprehensive Income Three Months Ended June 30, 2017 Parent Guarantor Restricted Subsidiaries Non-Guarantor Non-Restricted Subsidiaries Eliminations Consolidated (In thousands) Revenues: Affiliates $ — $ 88,022 $ 5,130 $ — $ 93,152 Third parties — 10,385 5,606 — 15,991 — 98,407 10,736 — 109,143 Operating costs and expenses: Operations (exclusive of depreciation and amortization) — 30,871 3,226 — 34,097 Depreciation and amortization — 15,791 4,154 — 19,945 General and administrative 865 1,750 — — 2,615 865 48,412 7,380 — 56,657 Operating income (loss) (865 ) 49,995 3,356 — 52,486 Other income (expense): Equity in earnings of subsidiaries 48,375 2,519 — (50,894 ) — Equity in earnings of equity method investments — 4,053 — — 4,053 Interest expense (6,175 ) (7,573 ) — — (13,748 ) Interest income — 103 — — 103 Gain on sale of assets and other — 87 2 — 89 42,200 (811 ) 2 (50,894 ) (9,503 ) Income before income taxes 41,335 49,184 3,358 (50,894 ) 42,983 State income tax expense — (127 ) — — (127 ) Net income 41,335 49,057 3,358 (50,894 ) 42,856 Allocation of net income attributable to noncontrolling interests — (682 ) (839 ) — (1,521 ) Net income attributable to the partners 41,335 48,375 2,519 (50,894 ) 41,335 Other comprehensive income (91 ) (91 ) — 91 (91 ) Comprehensive income attributable to the partners $ 41,244 $ 48,284 $ 2,519 $ (50,803 ) $ 41,244 Condensed Consolidating Statement of Comprehensive Income Six Months Ended June 30, 2018 Parent Guarantor Restricted Subsidiaries Non-Guarantor Non-restricted Subsidiaries Eliminations Consolidated (In thousands) Revenues: Affiliates $ — $ 183,813 $ 11,628 $ — $ 195,441 Third parties — 39,518 12,685 — 52,203 — 223,331 24,313 — 247,644 Operating costs and expenses: Operations (exclusive of depreciation and amortization) — 64,158 6,577 — 70,735 Depreciation and amortization — 41,432 8,318 — 49,750 General and administrative 2,041 3,754 — — 5,795 2,041 109,344 14,895 — 126,280 Operating income (loss) (2,041 ) 113,987 9,418 — 121,364 Other income (expense): Equity in earnings (loss) of subsidiaries 123,618 7,093 — (130,711 ) — Equity in earnings of equity method investments — 3,013 — — 3,013 Interest expense (35,311 ) 104 — — (35,207 ) Interest income — 1,041 — — 1,041 Gain (loss) on sale of assets and other 45 (51 ) 39 — 33 88,352 11,200 39 (130,711 ) (31,120 ) Income (loss) before income taxes 86,311 125,187 9,457 (130,711 ) 90,244 State income tax expense — (110 ) — — (110 ) Net income (loss) 86,311 125,077 9,457 (130,711 ) 90,134 Allocation of net income attributable to noncontrolling interests — (1,459 ) (2,364 ) — (3,823 ) Net income (loss) attributable to Holly Energy Partners 86,311 123,618 7,093 (130,711 ) 86,311 Other comprehensive income (loss) — — — — — Comprehensive income (loss) $ 86,311 $ 123,618 $ 7,093 $ (130,711 ) $ 86,311 Condensed Consolidating Statement of Comprehensive Income Six Months Ended June 30, 2017 Parent Guarantor Restricted Subsidiaries Non-Guarantor Non-Restricted Subsidiaries Eliminations Consolidated (In thousands) Revenues: Affiliates $ — $ 168,798 $ 13,379 $ — $ 182,177 Third parties — 21,388 11,212 — 32,600 — 190,186 24,591 — 214,777 Operating costs and expenses: Operations (exclusive of depreciation and amortization) — 59,963 6,623 — 66,586 Depreciation and amortization — 30,644 8,078 — 38,722 General and administrative 2,020 3,229 — — 5,249 2,020 93,836 14,701 — 110,557 Operating income (loss) (2,020 ) 96,350 9,890 — 104,220 Other income (expense): Equity in earnings (loss) of subsidiaries 93,658 7,420 — (101,078 ) — Equity in earnings of equity method investments — 5,893 — — 5,893 Interest expense (12,515 ) (14,772 ) — — (27,287 ) Interest income — 205 — — 205 Loss on early extinguishment of debt (12,225 ) — — — (12,225 ) Gain (loss) on sale of assets and other — 159 3 — 162 68,918 (1,095 ) 3 (101,078 ) (33,252 ) Income (loss) before income taxes 66,898 95,255 9,893 (101,078 ) 70,968 State income tax expense — (233 ) — — (233 ) Net income (loss) 66,898 95,022 9,893 (101,078 ) 70,735 Allocation of net income attributable to noncontrolling interests — (1,364 ) (2,473 ) — (3,837 ) Net income (loss) attributable to Holly Energy Partners 66,898 93,658 7,420 (101,078 ) 66,898 Other comprehensive income (loss) (28 ) (28 ) — 28 (28 ) Comprehensive income (loss) $ 66,870 $ 93,630 $ 7,420 $ (101,050 ) $ 66,870 Condensed Consolidating Statement of Cash Flows Six Months Ended June 30, 2018 Parent Guarantor Restricted Subsidiaries Non-Guarantor Non-Restricted Subsidiaries Eliminations Consolidated (In thousands) Cash flows from operating activities $ (33,588 ) $ 182,983 $ 18,661 $ (7,093 ) $ 160,963 Cash flows from investing activities Additions to properties and equipment — (18,829 ) (5,910 ) — (24,739 ) Business and asset acquisitions — (6,831 ) — — (6,831 ) Distributions from UNEV in excess of earnings — 3,407 — (3,407 ) — Proceeds from sale of assets — 196 — — 196 Distributions in excess of equity in earnings of equity investments — 299 — — 299 — (21,758 ) (5,910 ) (3,407 ) (31,075 ) Cash flows from financing activities Net repayments under credit agreement (112,000 ) — — — (112,000 ) Net intercompany financing activities 160,330 (160,330 ) — — — Proceeds from issuance of common units 114,899 (68 ) — — 114,831 Contribution from general partner 492 — — — 492 Distributions to HEP unitholders (130,075 ) — — — (130,075 ) Distributions to noncontrolling interests — — (14,000 ) 10,500 (3,500 ) Units withheld for tax withholding obligations (58 ) — — — (58 ) Other — (698 ) — — (698 ) 33,588 (161,096 ) (14,000 ) 10,500 (131,008 ) Cash and cash equivalents Increase (decrease) for the period — 129 (1,249 ) — (1,120 ) Beginning of period 2 511 7,263 — 7,776 End of period $ 2 $ 640 $ 6,014 $ — $ 6,656 Condensed Consolidating Statement of Cash Flows Six Months Ended June 30, 2017 Parent Guarantor Restricted Subsidiaries Non-Guarantor Non-Restricted Subsidiaries Eliminations Consolidated (In thousands) Cash flows from operating activities $ (20,377 ) $ 122,025 $ 19,373 $ (7,420 ) $ 113,601 Cash flows from investing activities Additions to properties and equipment — (17,670 ) (2,854 ) — (20,524 ) Proceeds from sale of assets — 635 — — 635 Distributions from UNEV in excess of earnings — 3,080 — (3,080 ) — Distributions in excess of equity in earnings of equity investments — 1,654 — — 1,654 — (12,301 ) (2,854 ) (3,080 ) (18,235 ) Cash flows from financing activities Net borrowings under credit agreement — 290,000 — — 290,000 Net intercompany financing activities 389,005 (389,005 ) — — — Redemption of senior notes (309,750 ) — — — (309,750 ) Proceeds from issuance of common units 52,383 251 — — 52,634 Distributions to HEP unitholders (112,195 ) — — — (112,195 ) Distributions to noncontrolling interests — — (14,000 ) 10,500 (3,500 ) Distribution to HFC for El Dorado tanks (103 ) — — — (103 ) Contributions from general partner 1,072 (77 ) — — 995 Units withheld for tax withholding obligations (35 ) — — — (35 ) Other — (730 ) — — (730 ) 20,377 (99,561 ) (14,000 ) 10,500 (82,684 ) Cash and cash equivalents Decrease for the period — 10,163 2,519 — 12,682 Beginning of period 2 301 3,354 — 3,657 End of period $ 2 $ 10,464 $ 5,873 $ — $ 16,339

Description of Business and P24

Description of Business and Presentation of Financial Statements (Policies)	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Consolidation, Policy	Principles of Consolidation and Common Control Transactions The consolidated financial statements include our accounts and those of subsidiaries and joint ventures that we control. All significant intercompany transactions and balances have been eliminated. Most of our acquisitions from HFC occurred while we were a consolidated variable interest entity (“VIE”) of HFC. Therefore, as an entity under common control with HFC, we recorded these acquisitions on our balance sheets at HFC's historical basis instead of our purchase price or fair value.
New Accounting Pronouncements, Policy	Accounting Pronouncements Adopted During the Periods Presented Share-Based Compensation In March 2016, an accounting standard update was issued which simplifies the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures and statutory tax withholding requirements, as well as classification in the statement of cash flows. We adopted this standard effective January 1, 2017, with no impact to our financial condition or results of operations. The new standard also requires that employee taxes paid when an employer withholds units for tax withholding purposes be reported as financing activities in the statement of cash flows on a retrospective basis. Previously, this activity was included in our operating activities. The impact of this change for the six months ended June 30, 2017 was not material to our consolidated statement of cash flows. Finally, consistent with our existing policy, we have elected to account for forfeitures on an estimated basis. Revenue Recognition In May 2014, an accounting standard update was issued requiring revenue to be recognized when promised goods or services are transferred to customers in an amount that reflects the expected consideration for these goods or services. This standard had an effective date of January 1, 2018, and we accounted for the new guidance using the modified retrospective implementation method, whereby a cumulative effect adjustment was recorded to retained earnings as of the date of initial application. In preparing for adoption, we evaluated the terms, conditions and performance obligations under our existing contracts with customers. Furthermore, we implemented policies to comply with this new standard. See Note 3 for additional information on our revenue recognition policies. Business Combinations In December 2014, an accounting standard update was issued to provide new guidance on the definition of a business in relation to accounting for identifiable intangible assets in business combinations. This standard had an effective date of January 1, 2018, and had no effect on our financial condition, results of operations or cash flows. Financial Assets and Liabilities In January 2016, an accounting standard update was issued requiring changes in the accounting and disclosures for financial instruments. This standard was effective beginning with our 2018 reporting year and had no effect on our financial condition, results of operations or cash flows. Accounting Pronouncements Not Yet Adopted Leases In February 2016, an accounting standard update was issued requiring leases to be measured and recognized as a lease liability, with a corresponding right-of-use asset on the balance sheet. This standard has an effective date of January 1, 2019, and we are evaluating the impact of this standard. In preparing for adoption, we have identified, reviewed and evaluated contracts containing lease and embedded lease arrangements. Additionally, we have acquired software and are implementing systems to facilitate lease capture and related accounting treatment.
Revenue Recognition, Policy	Revenues are generally recognized as products are shipped through our pipelines and terminals, feedstocks are processed through our refinery processing units or other services are rendered. The majority of our contracts with customers meet the definition of a lease since (1) performance of the contracts is dependent on specified property, plant, or equipment and (2) it is remote that one or more parties other than the customer will take more than a minor amount of the output associated with the specified property, plant, or equipment. Therefore, we bifurcate the consideration received between lease and service revenue. The service component is within the scope of Accounting Standards Codification (“ASC”) 606, which largely codified ASU 2014-09.

Acquisitions (Tables)

Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2018
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following summarizes the value of assets and liabilities acquired: (in thousands) Cash and cash equivalents $ 4,609 Accounts receivable 5,164 Prepaid and other current assets 8 Properties and equipment 275,061 Intangible assets 70,182 Goodwill 13,845 Accounts payable (3,598 ) Accrued property taxes (1,438 ) Net assets acquired $ 363,833

Revenues (Tables)

Revenues (Tables)	6 Months Ended
	Jun. 30, 2018
Revenue from Contract with Customer [Abstract]
Schedule of Cumulative Effect of Adjustment	The following table reflects the cumulative effect of adoption as of January 1, 2018: Prior to Adoption Increase (Decrease) As Adjusted (In millions) Deferred revenue $ 9,598 $ (1,320 ) $ 8,278 Partners’ equity: Common unitholders $ 393,959 $ 1,320 $ 395,279
Schedule of Contract Asset and Contract Liability Balances	June 30, January 1, (In thousands) Contract asset $ 1,562 $ — Contract liability $ (4,441 ) $ (2,713 )
Schedule of Future Performance Obligations	We expect to recognize revenue for these unfulfilled performance obligations as shown in the table below (amounts shown in table include both service and lease revenues): Years Ending December 31, (In millions) Remainder of 2018 $ 188 2019 352 2020 305 2021 294 2022 267 Thereafter 1,042 Total $ 2,448
Schedule of Disaggregated Revenue	Disaggregated revenues are as follows: Three Months Ended Six Months Ended 2018 2017 2018 2017 (In thousands) Pipelines $ 65,539 $ 55,248 $ 137,708 $ 107,695 Terminals, tanks and loading racks 34,386 36,356 72,567 70,163 Refinery processing units 18,835 17,539 37,369 36,919 $ 118,760 $ 109,143 $ 247,644 $ 214,777

Financial Instruments (Tables)

Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Financial Instruments Measured on Recurring Basis	The carrying amounts and estimated fair values of our senior notes were as follows: June 30, 2018 December 31, 2017 Financial Instrument Fair Value Input Level Carrying Value Fair Value Carrying Value Fair Value (In thousands) Liabilities: 6% Senior notes Level 2 495,599 507,025 495,308 525,120 $ 495,599 $ 507,025 $ 495,308 $ 525,120

Properties and Equipment (Table

Properties and Equipment (Tables)	6 Months Ended
	Jun. 30, 2018
Property, Plant and Equipment [Abstract]
Schedule of Properties and Equipment	The carrying amounts of our properties and equipment are as follows: June 30, December 31, (In thousands) Pipelines, terminals and tankage $ 1,525,033 $ 1,541,722 Refinery assets 347,338 347,338 Land and right of way 85,960 86,484 Construction in progress 42,811 12,029 Other 40,420 35,659 2,041,562 2,023,232 Less accumulated depreciation 489,853 453,761 $ 1,551,709 $ 1,569,471

Intangible Assets (Tables)

Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets by Major Class	The carrying amounts of our intangible assets are as follows: Useful Life June 30, December 31, (In thousands) Delek transportation agreement 30 years $ 59,933 $ 59,933 HFC transportation agreement 10-15 years 75,131 75,131 Customer relationships 10 years 69,282 69,282 Other 50 50 204,396 204,396 Less accumulated amortization 82,461 74,933 $ 121,935 $ 129,463

Employees, Retirement and Inc30

Employees, Retirement and Incentive Plans (Tables)	6 Months Ended
	Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Nonvested Restricted Stock Units Activity	A summary of restricted and phantom unit activity and changes during the six months ended June 30, 2018 , is presented below: Restricted and Phantom Units Units Weighted Average Grant-Date Fair Value Outstanding at January 1, 2018 (nonvested) 119,009 $ 34.77 Granted 12,890 30.23 Forfeited (698 ) 34.59 Outstanding at June 30, 2018 (nonvested) 131,201 $ 34.33
Schedule of Nonvested Performance-based Units Activity	A summary of performance unit activity and changes for the six months ended June 30, 2018 , is presented below: Performance Units Units Outstanding at January 1, 2018 (nonvested) 36,911 Granted 2,764 Vesting and transfer of common units to recipients (4,283 ) Outstanding at June 30, 2018 (nonvested) 35,392

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 30, 2018
Debt Instruments [Abstract]
Schedule of Long-term Debt Instruments	The carrying amounts of our long-term debt are as follows: June 30, December 31, (In thousands) Credit Agreement Amount outstanding $ 900,000 $ 1,012,000 6% Senior Notes Principal 500,000 500,000 Unamortized premium and debt issuance costs (4,401 ) (4,692 ) 495,599 495,308 Total long-term debt $ 1,395,599 $ 1,507,308
Schedule of Interest Expense and Other Debt Information	Interest expense consists of the following components: Six Months Ended June 30, 2018 2017 (In thousands) Interest on outstanding debt: Credit Agreement, net of interest on interest rate swaps $ 17,850 $ 13,299 6.5% Senior Notes — 162 6% Senior Notes 15,000 12,000 Amortization of discount and deferred debt issuance costs 1,516 1,536 Commitment fees and other 1,007 720 Total interest incurred 35,373 27,717 Less capitalized interest 166 430 Net interest expense $ 35,207 $ 27,287 Cash paid for interest $ 33,935 $ 33,700

Significant Customers (Tables)

Significant Customers (Tables)	6 Months Ended
	Jun. 30, 2018
Risks and Uncertainties [Abstract]
Schedules of Concentration of Risk, by Risk Factor	The following table presents the percentage of total revenues generated by each of these customers: Three Months Ended Six Months Ended 2018 2017 2018 2017 HFC 79 % 85 % 79 % 85 % Delek 7 % 6 % 6 % 7 %

Partners' Equity, Income Allo33

Partners' Equity, Income Allocations and Cash Distributions (Tables)	6 Months Ended
	Jun. 30, 2018
Partners' Capital [Abstract]
Schedule of Allocation of General Partner Interest in Net Income	The following table presents the allocation of the general partner interest in net income for the periods presented below: Three Months Ended Six Months Ended 2018 2017 2018 2017 (In thousands) General partner interest in net income $ — $ 827 $ — $ 1,338 General partner incentive distribution — 17,501 — 34,128 Total general partner interest in net income $ — $ 18,328 $ — $ 35,466
Schedule of Distributions Made to Limited Partners	The following table presents the allocation of our regular quarterly cash distributions to the general and limited partners for the periods in which they apply. Our distributions are declared subsequent to quarter end; therefore, the amounts presented do not reflect distributions paid during the periods presented below. Three Months Ended Six Months Ended 2018 2017 2018 2017 (In thousands, except per unit data) General partner interest in distribution $ — $ 1,188 $ — $ 2,336 General partner incentive distribution — 17,501 — 34,128 Total general partner distribution — 18,689 — 36,464 Limited partner distribution 67,091 40,682 133,670 80,314 Total regular quarterly cash distribution $ 67,091 $ 59,371 $ 133,670 $ 116,778 Cash distribution per unit applicable to limited partners $ 0.6600 $ 0.6325 $ 1.3150 $ 1.2525

Net Income per Limited Partne34

Net Income per Limited Partner Unit (Tables)	6 Months Ended
	Jun. 30, 2018
Net Income per Limited Partner Unit [Abstract]
Schedule of Allocation to Limited Partner Interest in Net Income	For purposes of applying the two-class method, including the allocation of cash distributions in excess of earnings, net income per limited partner unit is computed as follows: Three Months Ended Six Months Ended 2018 2017 2018 2017 (In thousands) Net income attributable to the partners $ 40,143 $ 41,335 $ 86,311 $ 66,898 Less: General partner’s distribution declared (including IDRs) — (18,689 ) — (36,464 ) Limited partner’s distribution declared on common units (67,091 ) (40,682 ) (133,670 ) (80,314 ) Distributions in excess of net income attributable to the partners $ (26,948 ) $ (18,036 ) $ (47,359 ) $ (49,880 )
Earnings per Unit by Type of Partner	General Partner (including IDRs) Limited Partners’ Common Units Total (In thousands, except per unit data) Three Months Ended June 30, 2018 Net income attributable to the partners: Distributions declared $ — $ 67,091 $ 67,091 Distributions in excess of net income attributable to the partners — (26,948 ) (26,948 ) Net income attributable to the partners $ — $ 40,143 $ 40,143 Weighted average limited partners' units outstanding 105,429 Limited partners' per unit interest in earnings - basic and diluted $ 0.38 Three Months Ended June 30, 2017 Net income attributable to the partners: Distributions declared $ 18,689 $ 40,682 $ 59,371 Distributions in excess of net income attributable to the partners (361 ) (17,675 ) (18,036 ) Net income attributable to the partners $ 18,328 $ 23,007 $ 41,335 Weighted average limited partners' units outstanding 64,086 Limited partners' per unit interest in earnings - basic and diluted $ 0.36 General Partner (including IDRs) Limited Partners’ Common Units Total (In thousands, except per unit data) Six Months Ended June 30, 2018 Net income attributable to partnership: Distributions declared $ — $ 133,670 $ 133,670 Distributions in excess of net income attributable to partnership — (47,359 ) (47,359 ) Net income attributable to partnership $ — $ 86,311 $ 86,311 Weighted average limited partners' units outstanding 104,637 Limited partners' per unit interest in earnings - basic and diluted $ 0.82 Six Months Ended June 30, 2017 Net income attributable to partnership: Distributions declared $ 36,464 $ 80,314 $ 116,778 Distributions in excess of net income attributable to partnership (998 ) (48,882 ) (49,880 ) Net income attributable to partnership $ 35,466 $ 31,432 $ 66,898 Weighted average limited partners' units outstanding 63,602 Limited partners' per unit interest in earnings - basic and diluted $ 0.49

Operating Segments (Tables)

Operating Segments (Tables)	6 Months Ended
	Jun. 30, 2018
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Three Months Ended Six Months Ended 2018 2017 2018 2017 Revenues: Pipelines and terminals - affiliate $ 75,178 $ 75,613 $ 158,072 $ 145,258 Pipelines and terminals - third-party 24,747 15,991 52,203 32,600 Refinery processing units - affiliate 18,835 17,539 37,369 36,919 Total segment revenues $ 118,760 $ 109,143 $ 247,644 $ 214,777 Segment operating income: Pipelines and terminals $ 51,004 $ 49,164 $ 111,217 $ 95,649 Refinery processing units 8,615 5,937 15,942 13,820 Total segment operating income 59,619 55,101 127,159 109,469 Unallocated general and administrative expenses (2,673 ) (2,615 ) (5,795 ) (5,249 ) Interest and financing costs, net (17,100 ) (13,645 ) (34,166 ) (39,307 ) Equity in earnings of unconsolidated affiliates 1,734 4,053 3,013 5,893 Gain (loss) on sale of assets and other (53 ) 89 33 162 Income before income taxes $ 41,527 $ 42,983 $ 90,244 $ 70,968 Capital Expenditures: Pipelines and terminals $ 12,127 $ 12,157 $ 24,739 $ 20,286 Refinery processing units — 102 — 238 Total capital expenditures $ 12,127 $ 12,259 $ 24,739 $ 20,524 June 30, 2018 December 31, 2017 (in thousands) Identifiable assets: Pipelines and terminals (1) $ 1,697,531 $ 1,728,074 Refinery processing units 321,191 328,585 Other 97,341 97,455 Total identifiable assets $ 2,116,063 $ 2,154,114 (1) Includes goodwill of $270.3 million and $266.7 million as of June 30, 2018 and December 31, 2017 , respectively.

Supplemental Guarantor _ Non-36

Supplemental Guarantor / Non-Guarantor Financial Information (Tables)	6 Months Ended
	Jun. 30, 2018
Supplemental Guarantor / Non-Guarantor Financial Information [Abstract]
Condensed Consolidating Balance Sheet	Condensed Consolidating Balance Sheet June 30, 2018 Parent Guarantor Restricted Subsidiaries Non-Guarantor Non-Restricted Subsidiaries Eliminations Consolidated (In thousands) ASSETS Current assets: Cash and cash equivalents $ 2 $ 640 $ 6,014 $ — $ 6,656 Accounts receivable — 45,447 5,305 (586 ) 50,166 Prepaid and other current assets 156 2,629 361 — 3,146 Total current assets 158 48,716 11,680 (586 ) 59,968 Properties and equipment, net — 1,197,968 353,741 — 1,551,709 Investment in subsidiaries 1,866,892 269,911 — (2,136,803 ) — Intangible assets, net — 121,935 — — 121,935 Goodwill — 270,336 — — 270,336 Equity method investments — 84,752 — — 84,752 Other assets 10,483 16,880 — — 27,363 Total assets $ 1,877,533 $ 2,010,498 $ 365,421 $ (2,137,389 ) $ 2,116,063 LIABILITIES AND EQUITY Current liabilities: Accounts payable $ — $ 19,284 $ 1,700 $ (586 ) $ 20,398 Accrued interest 13,189 — — — 13,189 Deferred revenue — 9,675 1,170 — 10,845 Accrued property taxes — 3,077 2,463 — 5,540 Other current liabilities 88 3,505 — — 3,593 Total current liabilities 13,277 35,541 5,333 (586 ) 53,565 Long-term debt 1,395,599 — — — 1,395,599 Other long-term liabilities 260 15,060 206 — 15,526 Deferred revenue — 48,405 — — 48,405 Class B unit — 44,600 — — 44,600 Equity - partners 468,397 1,866,892 269,911 (2,136,803 ) 468,397 Equity - noncontrolling interest — — 89,971 — 89,971 Total liabilities and equity $ 1,877,533 $ 2,010,498 $ 365,421 $ (2,137,389 ) $ 2,116,063 Condensed Consolidating Balance Sheet December 31, 2017 Parent Guarantor Restricted Subsidiaries Non-Guarantor Non-Restricted Subsidiaries Eliminations Consolidated (In thousands) ASSETS Current assets: Cash and cash equivalents $ 2 $ 511 $ 7,263 $ — $ 7,776 Accounts receivable — 59,448 5,038 (182 ) 64,304 Prepaid and other current assets 13 2,016 282 — 2,311 Total current assets 15 61,975 12,583 (182 ) 74,391 Properties and equipment, net — 1,213,626 355,845 — 1,569,471 Investment in subsidiaries 1,902,285 273,319 — (2,175,604 ) — Intangible assets, net — 129,463 — — 129,463 Goodwill — 266,716 — — 266,716 Equity method investments — 85,279 — — 85,279 Other assets 11,753 17,041 — — 28,794 Total assets $ 1,914,053 $ 2,047,419 $ 368,428 $ (2,175,786 ) $ 2,154,114 LIABILITIES AND EQUITY Current liabilities: Accounts payable $ — $ 20,928 $ 1,526 $ (182 ) $ 22,272 Accrued interest 12,500 756 — — 13,256 Deferred revenue — 8,540 1,058 — 9,598 Accrued property taxes — 3,431 1,221 — 4,652 Other current liabilities — 5,707 — — 5,707 Total current liabilities 12,500 39,362 3,805 (182 ) 55,485 Long-term debt 1,507,308 — — — 1,507,308 Other long-term liabilities 286 15,359 198 — 15,843 Deferred revenue — 47,272 — — 47,272 Class B unit — 43,141 — — 43,141 Equity - partners 393,959 1,902,285 273,319 (2,175,604 ) 393,959 Equity - noncontrolling interest — — 91,106 — 91,106 Total liabilities and equity $ 1,914,053 $ 2,047,419 $ 368,428 $ (2,175,786 ) $ 2,154,114
Condensed Consolidating Statement of Comprehensive Income	Condensed Consolidating Statement of Comprehensive Income Three Months Ended June 30, 2018 Parent Guarantor Restricted Subsidiaries Non-Guarantor Non-restricted Subsidiaries Eliminations Consolidated (In thousands) Revenues: Affiliates $ — $ 89,522 $ 4,491 $ — $ 94,013 Third parties — 19,540 5,207 — 24,747 — 109,062 9,698 — 118,760 Operating costs and expenses: Operations (exclusive of depreciation and amortization) — 31,494 3,039 — 34,533 Depreciation and amortization 20,431 4,177 — 24,608 General and administrative 761 1,912 — — 2,673 761 53,837 7,216 — 61,814 Operating income (loss) (761 ) 55,225 2,482 — 56,946 Other income (expense): Equity in earnings of subsidiaries 58,566 1,881 — (60,447 ) — Equity in earnings of equity method investments — 1,734 — — 1,734 Interest expense (17,662 ) 36 — — (17,626 ) Interest income — 526 — — 526 Gain on sale of assets and other — (79 ) 26 — (53 ) 40,904 4,098 26 (60,447 ) (15,419 ) Income before income taxes 40,143 59,323 2,508 (60,447 ) 41,527 State income tax expense — (28 ) — — (28 ) Net income 40,143 59,295 2,508 (60,447 ) 41,499 Allocation of net income attributable to noncontrolling interests — (729 ) (627 ) — (1,356 ) Net income attributable to the partners 40,143 58,566 1,881 (60,447 ) 40,143 Other comprehensive income — — — — — Comprehensive income attributable to the partners $ 40,143 $ 58,566 $ 1,881 $ (60,447 ) $ 40,143 Condensed Consolidating Statement of Comprehensive Income Three Months Ended June 30, 2017 Parent Guarantor Restricted Subsidiaries Non-Guarantor Non-Restricted Subsidiaries Eliminations Consolidated (In thousands) Revenues: Affiliates $ — $ 88,022 $ 5,130 $ — $ 93,152 Third parties — 10,385 5,606 — 15,991 — 98,407 10,736 — 109,143 Operating costs and expenses: Operations (exclusive of depreciation and amortization) — 30,871 3,226 — 34,097 Depreciation and amortization — 15,791 4,154 — 19,945 General and administrative 865 1,750 — — 2,615 865 48,412 7,380 — 56,657 Operating income (loss) (865 ) 49,995 3,356 — 52,486 Other income (expense): Equity in earnings of subsidiaries 48,375 2,519 — (50,894 ) — Equity in earnings of equity method investments — 4,053 — — 4,053 Interest expense (6,175 ) (7,573 ) — — (13,748 ) Interest income — 103 — — 103 Gain on sale of assets and other — 87 2 — 89 42,200 (811 ) 2 (50,894 ) (9,503 ) Income before income taxes 41,335 49,184 3,358 (50,894 ) 42,983 State income tax expense — (127 ) — — (127 ) Net income 41,335 49,057 3,358 (50,894 ) 42,856 Allocation of net income attributable to noncontrolling interests — (682 ) (839 ) — (1,521 ) Net income attributable to the partners 41,335 48,375 2,519 (50,894 ) 41,335 Other comprehensive income (91 ) (91 ) — 91 (91 ) Comprehensive income attributable to the partners $ 41,244 $ 48,284 $ 2,519 $ (50,803 ) $ 41,244 Condensed Consolidating Statement of Comprehensive Income Six Months Ended June 30, 2018 Parent Guarantor Restricted Subsidiaries Non-Guarantor Non-restricted Subsidiaries Eliminations Consolidated (In thousands) Revenues: Affiliates $ — $ 183,813 $ 11,628 $ — $ 195,441 Third parties — 39,518 12,685 — 52,203 — 223,331 24,313 — 247,644 Operating costs and expenses: Operations (exclusive of depreciation and amortization) — 64,158 6,577 — 70,735 Depreciation and amortization — 41,432 8,318 — 49,750 General and administrative 2,041 3,754 — — 5,795 2,041 109,344 14,895 — 126,280 Operating income (loss) (2,041 ) 113,987 9,418 — 121,364 Other income (expense): Equity in earnings (loss) of subsidiaries 123,618 7,093 — (130,711 ) — Equity in earnings of equity method investments — 3,013 — — 3,013 Interest expense (35,311 ) 104 — — (35,207 ) Interest income — 1,041 — — 1,041 Gain (loss) on sale of assets and other 45 (51 ) 39 — 33 88,352 11,200 39 (130,711 ) (31,120 ) Income (loss) before income taxes 86,311 125,187 9,457 (130,711 ) 90,244 State income tax expense — (110 ) — — (110 ) Net income (loss) 86,311 125,077 9,457 (130,711 ) 90,134 Allocation of net income attributable to noncontrolling interests — (1,459 ) (2,364 ) — (3,823 ) Net income (loss) attributable to Holly Energy Partners 86,311 123,618 7,093 (130,711 ) 86,311 Other comprehensive income (loss) — — — — — Comprehensive income (loss) $ 86,311 $ 123,618 $ 7,093 $ (130,711 ) $ 86,311 Condensed Consolidating Statement of Comprehensive Income Six Months Ended June 30, 2017 Parent Guarantor Restricted Subsidiaries Non-Guarantor Non-Restricted Subsidiaries Eliminations Consolidated (In thousands) Revenues: Affiliates $ — $ 168,798 $ 13,379 $ — $ 182,177 Third parties — 21,388 11,212 — 32,600 — 190,186 24,591 — 214,777 Operating costs and expenses: Operations (exclusive of depreciation and amortization) — 59,963 6,623 — 66,586 Depreciation and amortization — 30,644 8,078 — 38,722 General and administrative 2,020 3,229 — — 5,249 2,020 93,836 14,701 — 110,557 Operating income (loss) (2,020 ) 96,350 9,890 — 104,220 Other income (expense): Equity in earnings (loss) of subsidiaries 93,658 7,420 — (101,078 ) — Equity in earnings of equity method investments — 5,893 — — 5,893 Interest expense (12,515 ) (14,772 ) — — (27,287 ) Interest income — 205 — — 205 Loss on early extinguishment of debt (12,225 ) — — — (12,225 ) Gain (loss) on sale of assets and other — 159 3 — 162 68,918 (1,095 ) 3 (101,078 ) (33,252 ) Income (loss) before income taxes 66,898 95,255 9,893 (101,078 ) 70,968 State income tax expense — (233 ) — — (233 ) Net income (loss) 66,898 95,022 9,893 (101,078 ) 70,735 Allocation of net income attributable to noncontrolling interests — (1,364 ) (2,473 ) — (3,837 ) Net income (loss) attributable to Holly Energy Partners 66,898 93,658 7,420 (101,078 ) 66,898 Other comprehensive income (loss) (28 ) (28 ) — 28 (28 ) Comprehensive income (loss) $ 66,870 $ 93,630 $ 7,420 $ (101,050 ) $ 66,870
Condensed Consolidating Statement of Cash Flows	Condensed Consolidating Statement of Cash Flows Six Months Ended June 30, 2018 Parent Guarantor Restricted Subsidiaries Non-Guarantor Non-Restricted Subsidiaries Eliminations Consolidated (In thousands) Cash flows from operating activities $ (33,588 ) $ 182,983 $ 18,661 $ (7,093 ) $ 160,963 Cash flows from investing activities Additions to properties and equipment — (18,829 ) (5,910 ) — (24,739 ) Business and asset acquisitions — (6,831 ) — — (6,831 ) Distributions from UNEV in excess of earnings — 3,407 — (3,407 ) — Proceeds from sale of assets — 196 — — 196 Distributions in excess of equity in earnings of equity investments — 299 — — 299 — (21,758 ) (5,910 ) (3,407 ) (31,075 ) Cash flows from financing activities Net repayments under credit agreement (112,000 ) — — — (112,000 ) Net intercompany financing activities 160,330 (160,330 ) — — — Proceeds from issuance of common units 114,899 (68 ) — — 114,831 Contribution from general partner 492 — — — 492 Distributions to HEP unitholders (130,075 ) — — — (130,075 ) Distributions to noncontrolling interests — — (14,000 ) 10,500 (3,500 ) Units withheld for tax withholding obligations (58 ) — — — (58 ) Other — (698 ) — — (698 ) 33,588 (161,096 ) (14,000 ) 10,500 (131,008 ) Cash and cash equivalents Increase (decrease) for the period — 129 (1,249 ) — (1,120 ) Beginning of period 2 511 7,263 — 7,776 End of period $ 2 $ 640 $ 6,014 $ — $ 6,656 Condensed Consolidating Statement of Cash Flows Six Months Ended June 30, 2017 Parent Guarantor Restricted Subsidiaries Non-Guarantor Non-Restricted Subsidiaries Eliminations Consolidated (In thousands) Cash flows from operating activities $ (20,377 ) $ 122,025 $ 19,373 $ (7,420 ) $ 113,601 Cash flows from investing activities Additions to properties and equipment — (17,670 ) (2,854 ) — (20,524 ) Proceeds from sale of assets — 635 — — 635 Distributions from UNEV in excess of earnings — 3,080 — (3,080 ) — Distributions in excess of equity in earnings of equity investments — 1,654 — — 1,654 — (12,301 ) (2,854 ) (3,080 ) (18,235 ) Cash flows from financing activities Net borrowings under credit agreement — 290,000 — — 290,000 Net intercompany financing activities 389,005 (389,005 ) — — — Redemption of senior notes (309,750 ) — — — (309,750 ) Proceeds from issuance of common units 52,383 251 — — 52,634 Distributions to HEP unitholders (112,195 ) — — — (112,195 ) Distributions to noncontrolling interests — — (14,000 ) 10,500 (3,500 ) Distribution to HFC for El Dorado tanks (103 ) — — — (103 ) Contributions from general partner 1,072 (77 ) — — 995 Units withheld for tax withholding obligations (35 ) — — — (35 ) Other — (730 ) — — (730 ) 20,377 (99,561 ) (14,000 ) 10,500 (82,684 ) Cash and cash equivalents Decrease for the period — 10,163 2,519 — 12,682 Beginning of period 2 301 3,354 — 3,657 End of period $ 2 $ 10,464 $ 5,873 $ — $ 16,339

Description of Business and P37

Description of Business and Presentation of Financial Statements - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Oct. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Other Ownership Interests [Line Items]
Ownership percentage, controlling interest		57.00%		57.00%
General partner interest	2.00%
Common unit, issued (in shares)	37,250,000
Limited partner distribution	$ 2,500	$ 67,091	$ 40,682	$ 133,670	$ 80,314
Partners' capital account, units, sold in private placement (in shares)		3,700,000
Sale of stock, price per share (in dollars per share)		$ 29.73		$ 29.73
Proceeds from issuance of private placement		$ 110,000
SLC Pipeline
Other Ownership Interests [Line Items]
Equity method investment, ownership percentage						75.00%
UNEV Pipeline
Other Ownership Interests [Line Items]
Equity method investment, ownership percentage		75.00%		75.00%
Frontier Pipeline
Other Ownership Interests [Line Items]
Equity method investment, ownership percentage		50.00%		50.00%		50.00%

Acquisitions - Narrative and Su

Acquisitions - Narrative and Summary of Acquired Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2017	Jun. 30, 2018	Oct. 31, 2017
Business Acquisition [Line Items]
Purchase price			$ 250,000
Step Acquisition, Equity Interest in Acquiree	$ 112,000
Step Acquisition - Remeasurement Gain	36,300
Consideration Transferred	$ 363,800
Working Capital Adjustment		$ 1,800
Assets Acquired - Cash and Equivalents			4,609
Assets Acquired - Receivables			5,164
Assets Acquired - Prepaid and other Current Assets			8
Assets Acquired - Properties and Equipment			275,061
Assets Acquired - Intangible Assets			70,182
Goodwill			13,845
Liabilities Assumed - Accounts Payable			(3,598)
Liabilities Assumed - Accrued Property Taxes			(1,438)
Net Assets Acquired			$ 363,833
SLC Pipeline
Business Acquisition [Line Items]
Equity method investment, ownership percentage	75.00%
Frontier Pipeline
Business Acquisition [Line Items]
Equity method investment, ownership percentage	50.00%	50.00%

Revenues - Schedule of Cumulati

Revenues - Schedule of Cumulative Effect of Adjustment (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Deferred revenue	$ 10,845	$ 8,278	$ 9,598
Partners’ equity: Common unitholders	$ 468,397	395,279	393,959
Prior to Adoption
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Deferred revenue			9,598
Partners’ equity: Common unitholders			$ 393,959
Increase (Decrease) | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Deferred revenue		(1,320)
Partners’ equity: Common unitholders		$ 1,320

Revenues - Narrative (Details)

Revenues - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease, Lease Income	$ 68,100	$ 138,700
Recognition of Deferred Revenue	3,400	7,000
Deferred revenue, recognized	400	2,600
Deferred Revenue, Period Increase (Decrease)		4,400
Deferred revenue	48,405	48,405	$ 47,272
Sales Revenue, Services, Other	$ 50,700	$ 109,000

Revenues - Narrative, Remaining

Revenues - Narrative, Remaining Performance Obligation (Details) $ in Millions	Jun. 30, 2018USD ($)yr
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unfulfilled performance obligations	$ 188
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unfulfilled performance obligations	352
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unfulfilled performance obligations	305
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unfulfilled performance obligations	294
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unfulfilled performance obligations	267
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unfulfilled performance obligations	1,042
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unfulfilled performance obligations	$ 2,448
Maximum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue service commitments expiration | yr	2,036
Minimum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue service commitments expiration | yr	2,019

Revenues - Schedule of Future P

Revenues - Schedule of Future Performance Obligations (Details) $ in Millions	6 Months Ended
	Jun. 30, 2018USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unfulfilled performance obligations	$ 188
Unfulfilled performance obligations, expected timing	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unfulfilled performance obligations	$ 352
Unfulfilled performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unfulfilled performance obligations	$ 305
Unfulfilled performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unfulfilled performance obligations	$ 294
Unfulfilled performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unfulfilled performance obligations	$ 267
Unfulfilled performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unfulfilled performance obligations	$ 2,448
Unfulfilled performance obligations, expected timing

Revenues - Schedule of Contract

Revenues - Schedule of Contract Asset and Liability Balances (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jan. 01, 2018
Revenue from Contract with Customer [Abstract]
Contract asset	$ 1,562	$ 0
Contract liability	$ (4,441)	$ (2,713)

Revenues - Schedule of Disaggre

Revenues - Schedule of Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Disaggregated Revenue	$ 118,760	$ 109,143	$ 247,644	$ 214,777
Pipelines
Disaggregation of Revenue [Line Items]
Disaggregated Revenue	65,539	55,248	137,708	107,695
Terminals, tanks and loading racks
Disaggregation of Revenue [Line Items]
Disaggregated Revenue	34,386	36,356	72,567	70,163
Refinery processing units
Disaggregation of Revenue [Line Items]
Disaggregated Revenue	$ 18,835	$ 17,539	$ 37,369	$ 36,919

Financial Instruments - Narrati

Financial Instruments - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Senior Notes	$ 100,000
6% Senior notes
Debt Instrument [Line Items]
Senior Notes		$ 495,308
Carrying Value
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure	495,599	495,308
Carrying Value | 6% Senior notes
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure		495,308
Senior Notes	495,599
Fair Value | Fair value inputs, Level 2
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure	507,025	525,120
Fair Value | 6% Senior notes | Fair value inputs, Level 2
Debt Instrument [Line Items]
Financial Liabilities Fair Value Disclosure	$ 507,025	$ 525,120

Properties and Equipment - Sche

Properties and Equipment - Schedule of Properties and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Properties and equipment, gross	$ 2,041,562	$ 2,023,232
Less accumulated depreciation	489,853	453,761
Properties and equipment, net	1,551,709	1,569,471
Pipelines, terminals and tankage
Property, Plant and Equipment [Line Items]
Properties and equipment, gross	1,525,033	1,541,722
Refinery Assets
Property, Plant and Equipment [Line Items]
Properties and equipment, gross	347,338	347,338
Land and right of way
Property, Plant and Equipment [Line Items]
Properties and equipment, gross	85,960	86,484
Construction in progress
Property, Plant and Equipment [Line Items]
Properties and equipment, gross	42,811	12,029
Other
Property, Plant and Equipment [Line Items]
Properties and equipment, gross	$ 40,420	$ 35,659

Properties and Equipment - Narr

Properties and Equipment - Narrative (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Property, Plant and Equipment [Abstract]
Interest costs, capitalized during period	$ 166	$ 430
Depreciation expense	$ 41,900	$ 34,900

Intangible Assets - Schedule of

Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets, Net [Abstract]
Intangible assets, gross	$ 204,396	$ 204,396
Less accumulated amortization	82,461	74,933
Intangible assets, net	121,935	129,463
Delek transportation agreement
Finite-Lived Intangible Assets, Net [Abstract]
Intangible assets, gross	$ 59,933	59,933
Useful Life	30 years
HFC transportation agreement
Finite-Lived Intangible Assets, Net [Abstract]
Intangible assets, gross	$ 75,131	75,131
Customer relationships
Finite-Lived Intangible Assets, Net [Abstract]
Intangible assets, gross	$ 69,282	69,282
Useful Life	10 years
Other
Finite-Lived Intangible Assets, Net [Abstract]
Intangible assets, gross	$ 50	$ 50
Minimum | HFC transportation agreement
Finite-Lived Intangible Assets, Net [Abstract]
Useful Life	10 years
Maximum | HFC transportation agreement
Finite-Lived Intangible Assets, Net [Abstract]
Useful Life	15 years

Intangible Assets - Narrative (

Intangible Assets - Narrative (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 7.5	$ 3.5
Estimated amortization expense, remainder of fiscal year	14
Estimated amortization expense, 2019	14
Estimated amortization expense, 2020	14
Estimated amortization expense, 2021	14
Estimated amortization expense, 2022	14
Estimated amortization expense, 2023	$ 9.8

Employees, Retirement and Inc50

Employees, Retirement and Incentive Plans Retirement and Benefit Plan Costs (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018USD ($)shares	Jun. 30, 2017USD ($)	Jun. 30, 2018USD ($)Componentsshares	Jun. 30, 2017USD ($)
Share-based Compensation Arrangements
Employee benefits and share-based compensation | $	$ 1.6	$ 1.3	$ 3.4	$ 3
Long-term Incentive Plan, Components | Components			4
Number of incentive-based award plans	2		2
Compensation costs of incentive awards | $	$ 0.7	$ 0.6	$ 1.5	$ 0.9
Deferred Bonus
Share-based Compensation Arrangements
Units authorized under equity-based compensation plans (new) | shares	2,500,000		2,500,000
Number of units available for grant | shares	1,323,787		1,323,787

Employees, Retirement and Inc51

Employees, Retirement and Incentive Plans Restricted Units (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Restricted and Phantom Units
Share-based Compensation Arrangements
Nonvested restricted units outstanding	131,201	119,009
Weighted average grant date fair value	$ 34.33	$ 34.77
Granted	12,890
Weighted Average Grant Date Fair Value	$ 30.23
Total unrecognized compensation related to nonvested units	$ 1.8
Weighted average remaining contractual term (years)	1 year 2 months
Forfeitures	(698)
Weighted Average Grant Date Fair Value - Forfeitures	$ 34.59
Performance Shares [Member]
Share-based Compensation Arrangements
Nonvested restricted units outstanding	35,392	36,911
Granted	2,764
Total unrecognized compensation related to nonvested units	$ 0.7
Weighted average remaining contractual term (years)	1 year 7 months
Maximum | Restricted Stock [Member]
Share-based Compensation Arrangements
Award Vesting Period	3 years

Employees, Retirement and Inc52

Employees, Retirement and Incentive Plans Performance Units (Details) $ in Millions	6 Months Ended
	Jun. 30, 2018USD ($)shares
Share-based Compensation Arrangement Instruments [Roll Forward]
Weighted Average Fair Value of Units Outstanding | $	$ 1.2
Performance Shares [Member]
Share-based Compensation Arrangements
Estimated Share Payouts Unit Awards Minimum	100.00%
Estimated Share Payouts Unit Awards Maximum	150.00%
Share-based Compensation Arrangement Instruments [Roll Forward]
Outstanding at January 1, 2018 (nonvested)	36,911
Granted	2,764
Vesting and transfer of common units to recipients	(4,283)
Outstanding at June 30, 2018 (nonvested)	35,392
Fair value of vested units transferred to recipients | $	$ 0.1
Total unrecognized compensation related to nonvested units | $	$ 0.7
Weighted average remaining contractual term (years)	1 year 7 months
Restricted and Phantom Units
Share-based Compensation Arrangement Instruments [Roll Forward]
Outstanding at January 1, 2018 (nonvested)	119,009
Granted	12,890
Outstanding at June 30, 2018 (nonvested)	131,201
Total unrecognized compensation related to nonvested units | $	$ 1.8
Weighted average remaining contractual term (years)	1 year 2 months
Executive Officer [Member] | Performance Shares [Member]
Share-based Compensation Arrangements
Estimated Share Payouts Unit Awards Minimum	50.00%
Estimated Share Payouts Unit Awards Maximum	150.00%

Debt - Senior Notes (Details)

Debt - Senior Notes (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jan. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Jan. 04, 2017
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,400,000		$ 1,400,000
Line of Credit Facility, Expiration Date		Jul. 1, 2022
Line of Credit Facility, Capacity Available for Trade Purchases		$ 50,000		50,000
Line of Credit Facility, Accordion Feature		300,000		300,000
Senior Notes		100,000		100,000
Loss on early extinguishment of debt		$ 0	$ 0	$ 0	$ (12,225)
6.5% Senior Notes [Member]
Debt Instrument [Line Items]
Principal							$ 300,000
Stated interest rate, senior notes		6.50%		6.50%			6.50%
Senior Notes Aggregate Redemption Amount							$ 309,800
Loss on early extinguishment of debt	$ 12,200
Unamortized Premium	9,800
Unamortized Discount	$ 2,400
6% Senior notes
Debt Instrument [Line Items]
Principal		$ 500,000	$ 400,000	$ 500,000	$ 400,000	$ 500,000
Senior Notes						$ 495,308
Stated interest rate, senior notes		6.00%		6.00%

Debt Long-Term Debt (Details)

Debt Long-Term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Jan. 04, 2017
Debt Instrument [Line Items]
Credit Agreement	$ 900,000	$ 1,012,000
Senior Notes	100,000
Total long-term debt	1,395,599	1,507,308
6% Senior notes
Debt Instrument [Line Items]
Principal	500,000	500,000	$ 400,000
Unamortized discount	$ (4,401)	(4,692)
Senior Notes		$ 495,308
6.5% Senior Notes [Member]
Debt Instrument [Line Items]
Principal				$ 300,000

Debt - Interest Rate Risk Manag

Debt - Interest Rate Risk Management (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	$ 900,000	$ 1,012,000
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	$ 150,000	$ 0

Debt - Interest Expense and Oth

Debt - Interest Expense and Other Debt Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Debt Instrument [Line Items]
Interest expense, debt			$ 35,373	$ 27,717
Less capitalized interest			166	430
Interest expense	$ 17,626	$ 13,748	35,207	27,287
Cash paid for interest			33,935	33,700
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest expense, debt			17,850	13,299
Senior Notes [Member] | 6.5% Senior Notes [Member]
Debt Instrument [Line Items]
Interest expense, debt			0	162
Senior Notes [Member] | 6% Senior notes
Debt Instrument [Line Items]
Interest expense, debt			15,000	12,000
Amortization discount and deferred debt issuance costs [Member]
Debt Instrument [Line Items]
Interest expense, debt			1,516	1,536
Commitment Fees and Other [Member]
Debt Instrument [Line Items]
Interest expense, debt			$ 1,007	$ 720

Debt Debt - Capital Leases (Det

Debt Debt - Capital Leases (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Capital Leased Assets [Line Items]
Capital Leased Assets, Gross	$ 5.7	$ 5.1
Capital Leases Accumulated Depreciation	$ 3.7	$ 3.3
Minimum
Capital Leased Assets [Line Items]
Capital Leases, Term of Contract	33 months
Maximum
Capital Leased Assets [Line Items]
Capital Leases, Term of Contract	48 months

Significant Customers - Narrati

Significant Customers - Narrative and Schedule of Percentage of Total Revenues By Customer (Details) - Sales Revenue, Net - Customers	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue, Major Customer [Line Items]
Concentration risk, percentage of total sales			86.00%
Concentration risk, number of significant customers			2
HFC
Revenue, Major Customer [Line Items]
Concentration risk, percentage of total sales	79.00%	85.00%	79.00%	85.00%
Delek
Revenue, Major Customer [Line Items]
Concentration risk, percentage of total sales	7.00%	6.00%	6.00%	7.00%

Related Party Transactions - Na

Related Party Transactions - Narrative (Details) $ in Thousands	1 Months Ended	3 Months Ended			6 Months Ended
	Oct. 31, 2017USD ($)shares	Jun. 30, 2018USD ($)yr	Dec. 31, 2017USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2018USD ($)yr	Jun. 30, 2017USD ($)
Related Party Transaction [Line Items]
Administrative fee, related party					$ 2,500
Revenue from related parties		$ 94,013		$ 93,152	195,441	$ 182,177
Omnibus Agreement G & A expenses, related party		600			1,200
Employee expenses reimbursed to related party		12,500		11,400	25,200	22,900
Reimbursements received from related parties		2,900		1,500	4,200	2,800
Accounts receivable due from HFC		36,700	$ 51,500		36,700
Due to Affiliate		11,300			11,300
Accounts payable to HFC		11,250	7,725		11,250
Lease Income		500		100	1,000	200
General partner interest	2.00%
Common unit, issued (in shares) | shares	37,250,000
Limited partner distribution	$ 2,500	67,091		40,682	133,670	80,314
Affiliated Entity
Related Party Transaction [Line Items]
Minimum annualized payments		334,500			334,500
Distributions to HEP unitholders		$ 36,600		$ 32,600	72,800	$ 63,900
Shortfall Payments
Related Party Transaction [Line Items]
Shortfall billings deferred revenue			$ 4,400		$ 1,700
Minimum
Related Party Transaction [Line Items]
Revenue service commitments expiration | yr		2,019			2,019
Maximum
Related Party Transaction [Line Items]
Revenue service commitments expiration | yr		2,036			2,036

Partners' Equity, Income Allo60

Partners' Equity, Income Allocations and Cash Distributions - Issuances (Details) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended	26 Months Ended
	Jun. 30, 2018USD ($)$ / sharesshares	Jun. 30, 2018USD ($)$ / sharesshares	Jun. 30, 2018USD ($)$ / sharesshares
Partners' Capital [Abstract]
Common units held by HFC (in shares) | shares	59,630,030	59,630,030	59,630,030
Ownership percentage, controlling interest	57.00%	57.00%	57.00%
Partners' capital account, units, sold in private placement (in shares) | shares	3,700,000
Sale of stock, price per share (in dollars per share) | $ / shares	$ 29.73	$ 29.73	$ 29.73
Proceeds from issuance of private placement | $	$ 110
Common Unit Issuance Program | $		$ 200
Partners' capital account, units, sale of units (in shares) | shares		171,246	2,413,153
Gross proceeds from issuance of common units | $		$ 5.2	$ 82.3

Partners' Equity, Income Allo61

Partners' Equity, Income Allocations and Cash Distributions - Allocations of Net Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Partners' Capital [Abstract]
General partner interest in net income	$ 0	$ 827	$ 0	$ 1,338
General partner incentive distribution	0	17,501	0	34,128
Total general partner interest in net income	$ 0	$ 18,328	$ 0	$ 35,466

Partners' Equity, Income Allo62

Partners' Equity, Income Allocations and Cash Distributions - Cash Distributions (Details) - USD ($) $ / shares in Units, $ in Thousands	Aug. 09, 2018	Jul. 30, 2018	Jul. 19, 2018	Oct. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Distribution Payments [Line Items]
Limited partner distribution				$ 2,500	$ 67,091	$ 40,682	$ 133,670	$ 80,314
Partner Distributions
General partner interest in distribution					0	1,188	0	2,336
General partner incentive distribution					0	17,501	0	34,128
Total general partner distribution					0	18,689	0	36,464
Limited partner distribution				$ 2,500	67,091	40,682	133,670	80,314
Total regular quarterly cash distributions					$ 67,091	$ 59,371	$ 133,670	$ 116,778
Cash distribution per unit applicable to limited partners (in dollars per share)					$ 0.6600	$ 0.6325	$ 1.3150	$ 1.2525
Subsequent Event
Distribution Payments [Line Items]
Dividends payable, date declared			Jul. 19, 2018
Partners' capital, distribution amount per share (in dollars per share)			$ 0.66
Dividends payable, date to be paid	Aug. 9, 2018
Dividends payable, date of record		Jul. 30, 2018
Limited partner distribution	$ 2,500
Partner Distributions
Limited partner distribution	$ 2,500

Net Income per Limited Partne63

Net Income per Limited Partner Unit - Schedules of Computations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Oct. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings per Unit by Type of Partner [Line Items]
Net income attributable to the partners		$ 40,143	$ 41,335	$ 86,311	$ 66,898
General Partners' Distribution Declared		0	(18,689)	0	(36,464)
Limited partner distribution declared	$ 2,500	67,091	40,682	133,670	80,314
Distributions in excess of net income attributable to the partners		(26,948)	(18,036)	(47,359)	(49,880)
Net income attributable to partnership		40,143	41,335	86,311	66,898
Total partner interest in net income		$ 67,091	$ 59,371	$ 133,670	$ 116,778
Weighted average limited partners’ units outstanding		105,429	64,086	104,637	63,602
Limited partners’ per unit interest in earnings—basic and diluted:		$ 0.38	$ 0.36	$ 0.82	$ 0.49
General Partner
Earnings per Unit by Type of Partner [Line Items]
Distributions in excess of net income attributable to the partners		$ 0	$ (361)	$ 0	$ (998)
Net income attributable to partnership		0	18,328	0	35,466
Limited Partner
Earnings per Unit by Type of Partner [Line Items]
Distributions in excess of net income attributable to the partners		(26,948)	(17,675)	(47,359)	(48,882)
Net income attributable to partnership		$ 40,143	$ 23,007	$ 86,311	$ 31,432

Environmental Environmental (De

Environmental Environmental (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Loss Contingencies [Line Items]
Environmental remediation expense	$ 300,000	$ 0	$ 0	$ 0
Accrued environmental expense	6,300,000		6,300,000		$ 6,500,000
Accrued environmental expense, noncurrent	4,700,000		4,700,000		5,000,000
Affiliated Entity
Loss Contingencies [Line Items]
Accrued environmental expense	$ 700,000		$ 700,000		$ 800,000

Operating Segments - Schedule o

Operating Segments - Schedule of Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenues		$ 118,760	$ 109,143	$ 247,644	$ 214,777
Operating Income (Loss)		56,946	52,486	121,364	104,220
Segment operating profit		59,619	55,101	127,159	109,469
Unallocated general and administrative		(2,673)	(2,615)	(5,795)	(5,249)
Interest and financing costs, net		(17,100)	(13,645)	(34,166)	(39,307)
Equity in earnings of unconsolidated affiliates		1,734	4,053	3,013	5,893
Gain (loss) on sale of assets and other		(53)	89	33	162
Income before income taxes		41,527	42,983	90,244	70,968
Capital Expenditures		12,127	12,259	24,739	20,524
Assets		2,116,063		2,116,063		$ 2,154,114
Goodwill		270,336		270,336		266,716
Pipelines and terminal - affiliate
Segment Reporting Information [Line Items]
Revenues		75,178	75,613	158,072	145,258
Pipelines and terminals - third party
Segment Reporting Information [Line Items]
Revenues		24,747	15,991	52,203	32,600
Operating Income (Loss)		51,004	49,164	111,217	95,649
Capital Expenditures		12,127	12,157	24,739	20,286
Assets	[1]	1,697,531		1,697,531		1,728,074
Refinery processing units
Segment Reporting Information [Line Items]
Revenues		18,835	17,539	37,369	36,919
Operating Income (Loss)		8,615	5,937	15,942	13,820
Capital Expenditures		0	$ 102	0	$ 238
Assets		321,191		321,191		328,585
Other
Segment Reporting Information [Line Items]
Assets		$ 97,341		$ 97,341		$ 97,455
[1]	Includes goodwill of $270.3 million and $266.7 million as of June 30, 2018 and December 31, 2017, respectively.

Supplemental Guarantor _ Non-66

Supplemental Guarantor / Non-Guarantor Financial Information Condensed Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jan. 01, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 6,656		$ 7,776	$ 16,339	$ 3,657
Accounts receivable	50,166		64,304
Prepaid and other current assets	3,146		2,311
Total current assets	59,968		74,391
Properties and equipment, net	1,551,709		1,569,471
Investment in subsidiaries	0		0
Intangible assets, net	121,935		129,463
Goodwill	270,336		266,716
Equity method investments	84,752		85,279
Other assets	27,363		28,794
Assets	2,116,063		2,154,114
Current liabilities:
Accounts payable	20,398		22,272
Accrued interest	13,189		13,256
Deferred revenue	10,845	$ 8,278	9,598
Accrued property taxes	5,540		4,652
Other current liabilities	3,593		5,707
Total current liabilities	53,565		55,485
Long-term debt	1,395,599		1,507,308
Other long-term liabilities	15,526		15,843
Deferred revenue	48,405		47,272
Class B unit	44,600		43,141
Equity - partners	468,397		393,959
Equity - noncontrolling interest	89,971		91,106
Total liabilities and equity	2,116,063		2,154,114
Parent
Current assets:
Cash and cash equivalents	2		2	2	2
Accounts receivable	0		0
Prepaid and other current assets	156		13
Total current assets	158		15
Properties and equipment, net	0		0
Investment in subsidiaries	1,866,892		1,902,285
Intangible assets, net	0		0
Goodwill	0		0
Equity method investments	0		0
Other assets	10,483		11,753
Assets	1,877,533		1,914,053
Current liabilities:
Accounts payable	0		0
Accrued interest	13,189		12,500
Deferred revenue	0		0
Accrued property taxes	0		0
Other current liabilities	88		0
Total current liabilities	13,277		12,500
Long-term debt	1,395,599		1,507,308
Other long-term liabilities	260		286
Deferred revenue	0		0
Class B unit	0		0
Equity - partners	468,397		393,959
Equity - noncontrolling interest	0		0
Total liabilities and equity	1,877,533		1,914,053
Guarantor Restricted Subsidiaries
Current assets:
Cash and cash equivalents	640		511	10,464	301
Accounts receivable	45,447		59,448
Prepaid and other current assets	2,629		2,016
Total current assets	48,716		61,975
Properties and equipment, net	1,197,968		1,213,626
Investment in subsidiaries	269,911		273,319
Intangible assets, net	121,935		129,463
Goodwill	270,336		266,716
Equity method investments	84,752		85,279
Other assets	16,880		17,041
Assets	2,010,498		2,047,419
Current liabilities:
Accounts payable	19,284		20,928
Accrued interest	0		756
Deferred revenue	9,675		8,540
Accrued property taxes	3,077		3,431
Other current liabilities	3,505		5,707
Total current liabilities	35,541		39,362
Long-term debt	0		0
Other long-term liabilities	15,060		15,359
Deferred revenue	48,405		47,272
Class B unit	44,600		43,141
Equity - partners	1,866,892		1,902,285
Equity - noncontrolling interest	0		0
Total liabilities and equity	2,010,498		2,047,419
Non-Guarantor Non-Restricted Subsidiaries
Current assets:
Cash and cash equivalents	6,014		7,263	5,873	3,354
Accounts receivable	5,305		5,038
Prepaid and other current assets	361		282
Total current assets	11,680		12,583
Properties and equipment, net	353,741		355,845
Investment in subsidiaries	0		0
Intangible assets, net	0		0
Goodwill	0		0
Equity method investments	0		0
Other assets	0		0
Assets	365,421		368,428
Current liabilities:
Accounts payable	1,700		1,526
Accrued interest	0		0
Deferred revenue	1,170		1,058
Accrued property taxes	2,463		1,221
Other current liabilities	0		0
Total current liabilities	5,333		3,805
Long-term debt	0		0
Other long-term liabilities	206		198
Deferred revenue	0		0
Class B unit	0		0
Equity - partners	269,911		273,319
Equity - noncontrolling interest	89,971		91,106
Total liabilities and equity	365,421		368,428
Eliminations
Current assets:
Cash and cash equivalents	0		0	$ 0	$ 0
Accounts receivable	(586)		(182)
Prepaid and other current assets	0		0
Total current assets	(586)		(182)
Properties and equipment, net	0		0
Investment in subsidiaries	(2,136,803)		(2,175,604)
Intangible assets, net	0		0
Goodwill	0		0
Equity method investments	0		0
Other assets	0		0
Assets	(2,137,389)		(2,175,786)
Current liabilities:
Accounts payable	(586)		(182)
Accrued interest	0		0
Deferred revenue	0		0
Accrued property taxes	0		0
Other current liabilities	0		0
Total current liabilities	(586)		(182)
Long-term debt	0		0
Other long-term liabilities	0		0
Deferred revenue	0		0
Class B unit	0		0
Equity - partners	(2,136,803)		(2,175,604)
Equity - noncontrolling interest	0		0
Total liabilities and equity	$ (2,137,389)		$ (2,175,786)

Supplemental Guarantor _ Non-67

Supplemental Guarantor / Non-Guarantor Financial Information Condensed Consolidating Statement of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues [Abstract]
Affiliates	$ 94,013	$ 93,152	$ 195,441	$ 182,177
Third parties	24,747	15,991	52,203	32,600
Total revenues	118,760	109,143	247,644	214,777
Operating costs and expenses [Abstract]
Operations (exclusive of depreciation and amortization)	34,533	34,097	70,735	66,586
Depreciation and amortization	24,608	19,945	49,750	38,722
General and administrative	2,673	2,615	5,795	5,249
Total operating costs and expenses	61,814	56,657	126,280	110,557
Operating Income (Loss)	56,946	52,486	121,364	104,220
Equity in earnings of subsidiaries	0	0	0	0
Equity in earnings of equity method investments	1,734	4,053	3,013	5,893
Interest expense	(17,626)	(13,748)	(35,207)	(27,287)
Interest income	526	103	1,041	205
Loss on early extinguishment of debt	0	0	0	(12,225)
Gain on sale of assets and other	(53)	89	33	162
Nonoperating Income (Expense)	(15,419)	(9,503)	(31,120)	(33,252)
Income before income taxes	41,527	42,983	90,244	70,968
State income tax benefit (expense)	(28)	(127)	(110)	(233)
Net income	41,499	42,856	90,134	70,735
Allocation of net income attributable to noncontrolling interests	(1,356)	(1,521)	(3,823)	(3,837)
Net income attributable to the partners	40,143	41,335	86,311	66,898
Other comprehensive income	0	(91)	0	(28)
Comprehensive income attributable to the partners	40,143	41,244	86,311	66,870
Parent
Revenues [Abstract]
Affiliates	0	0	0	0
Third parties	0	0	0	0
Total revenues	0	0	0	0
Operating costs and expenses [Abstract]
Operations (exclusive of depreciation and amortization)	0	0	0	0
Depreciation and amortization		0	0	0
General and administrative	761	865	2,041	2,020
Total operating costs and expenses	761	865	2,041	2,020
Operating Income (Loss)	(761)	(865)	(2,041)	(2,020)
Equity in earnings of subsidiaries	58,566	48,375	123,618	93,658
Equity in earnings of equity method investments	0	0	0	0
Interest expense	(17,662)	(6,175)	(35,311)	(12,515)
Interest income	0	0	0	0
Loss on early extinguishment of debt				(12,225)
Gain on sale of assets and other	0	0	45	0
Nonoperating Income (Expense)	40,904	42,200	88,352	68,918
Income before income taxes	40,143	41,335	86,311	66,898
State income tax benefit (expense)	0	0	0	0
Net income	40,143	41,335	86,311	66,898
Allocation of net income attributable to noncontrolling interests	0	0	0	0
Net income attributable to the partners	40,143	41,335	86,311	66,898
Other comprehensive income	0	(91)	0	(28)
Comprehensive income attributable to the partners	40,143	41,244	86,311	66,870
Guarantor Restricted Subsidiaries
Revenues [Abstract]
Affiliates	89,522	88,022	183,813	168,798
Third parties	19,540	10,385	39,518	21,388
Total revenues	109,062	98,407	223,331	190,186
Operating costs and expenses [Abstract]
Operations (exclusive of depreciation and amortization)	31,494	30,871	64,158	59,963
Depreciation and amortization	20,431	15,791	41,432	30,644
General and administrative	1,912	1,750	3,754	3,229
Total operating costs and expenses	53,837	48,412	109,344	93,836
Operating Income (Loss)	55,225	49,995	113,987	96,350
Equity in earnings of subsidiaries	1,881	2,519	7,093	7,420
Equity in earnings of equity method investments	1,734	4,053	3,013	5,893
Interest expense	36	(7,573)	104	(14,772)
Interest income	526	103	1,041	205
Loss on early extinguishment of debt				0
Gain on sale of assets and other	(79)	87	(51)	159
Nonoperating Income (Expense)	4,098	(811)	11,200	(1,095)
Income before income taxes	59,323	49,184	125,187	95,255
State income tax benefit (expense)	(28)	(127)	(110)	(233)
Net income	59,295	49,057	125,077	95,022
Allocation of net income attributable to noncontrolling interests	(729)	(682)	(1,459)	(1,364)
Net income attributable to the partners	58,566	48,375	123,618	93,658
Other comprehensive income	0	(91)	0	(28)
Comprehensive income attributable to the partners	58,566	48,284	123,618	93,630
Non-Guarantor Non-Restricted Subsidiaries
Revenues [Abstract]
Affiliates	4,491	5,130	11,628	13,379
Third parties	5,207	5,606	12,685	11,212
Total revenues	9,698	10,736	24,313	24,591
Operating costs and expenses [Abstract]
Operations (exclusive of depreciation and amortization)	3,039	3,226	6,577	6,623
Depreciation and amortization	4,177	4,154	8,318	8,078
General and administrative	0	0	0	0
Total operating costs and expenses	7,216	7,380	14,895	14,701
Operating Income (Loss)	2,482	3,356	9,418	9,890
Equity in earnings of subsidiaries	0	0	0	0
Equity in earnings of equity method investments	0	0	0	0
Interest expense	0	0	0	0
Interest income	0	0	0	0
Loss on early extinguishment of debt				0
Gain on sale of assets and other	26	2	39	3
Nonoperating Income (Expense)	26	2	39	3
Income before income taxes	2,508	3,358	9,457	9,893
State income tax benefit (expense)	0	0	0	0
Net income	2,508	3,358	9,457	9,893
Allocation of net income attributable to noncontrolling interests	(627)	(839)	(2,364)	(2,473)
Net income attributable to the partners	1,881	2,519	7,093	7,420
Other comprehensive income	0	0	0	0
Comprehensive income attributable to the partners	1,881	2,519	7,093	7,420
Eliminations
Revenues [Abstract]
Affiliates	0	0	0	0
Third parties	0	0	0	0
Total revenues	0	0	0	0
Operating costs and expenses [Abstract]
Operations (exclusive of depreciation and amortization)	0	0	0	0
Depreciation and amortization	0	0	0	0
General and administrative	0	0	0	0
Total operating costs and expenses	0	0	0	0
Operating Income (Loss)	0	0	0	0
Equity in earnings of subsidiaries	(60,447)	(50,894)	(130,711)	(101,078)
Equity in earnings of equity method investments	0	0	0	0
Interest expense	0	0	0	0
Interest income	0	0	0	0
Loss on early extinguishment of debt				0
Gain on sale of assets and other	0	0	0	0
Nonoperating Income (Expense)	(60,447)	(50,894)	(130,711)	(101,078)
Income before income taxes	(60,447)	(50,894)	(130,711)	(101,078)
State income tax benefit (expense)	0	0	0	0
Net income	(60,447)	(50,894)	(130,711)	(101,078)
Allocation of net income attributable to noncontrolling interests	0	0	0	0
Net income attributable to the partners	(60,447)	(50,894)	(130,711)	(101,078)
Other comprehensive income	0	91	0	28
Comprehensive income attributable to the partners	$ (60,447)	$ (50,803)	$ (130,711)	$ (101,050)

Supplemental Guarantor _ Non-68

Supplemental Guarantor / Non-Guarantor Financial Information Condensed Consolidating Statement of Cash Flows (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	$ 160,963	$ 113,601
Cash flows from investing activities
Additions to properties and equipment	(24,739)	(20,524)
Other Payments to Acquire Businesses	(6,831)	0
Distributions from UNEV in excess of earnings	0
Proceeds from sale of assets	196	635
Proceeds from Noncontrolling Interests		0
Distributions in excess of equity in earnings of equity investments	299	1,654
Net cash used for investing activities	(31,075)	(18,235)
Cash flows from financing activities
Net borrowings (repayments) under credit agreement	(112,000)	290,000
Net intercompany financing activities	0	0
Proceeds from Issuance of common units	114,831	52,634
Redemption of 6.5% Senior Notes	0	(309,750)
Distributions to HEP unitholders	(130,075)	(112,195)
Contributions from general partner	492	995
Distribution to HFC for El Dorado tanks		(103)
Distributions to noncontrolling interests	(3,500)	(3,500)
Units withheld for tax withholding obligations	(58)	(35)
Other	(698)	(730)
Net cash used by financing activities	(131,008)	(82,684)
Increase (decrease) for the period	(1,120)	12,682
Beginning of period	7,776	3,657
End of period	6,656	16,339
Parent
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(33,588)	(20,377)
Cash flows from investing activities
Additions to properties and equipment	0	0
Other Payments to Acquire Businesses	0
Distributions from UNEV in excess of earnings	0
Proceeds from sale of assets	0	0
Proceeds from Noncontrolling Interests		0
Distributions in excess of equity in earnings of equity investments	0	0
Net cash used for investing activities	0	0
Cash flows from financing activities
Net borrowings (repayments) under credit agreement	(112,000)	0
Net intercompany financing activities	160,330	389,005
Proceeds from Issuance of common units	114,899	52,383
Redemption of 6.5% Senior Notes		(309,750)
Distributions to HEP unitholders	(130,075)	(112,195)
Contributions from general partner	492	1,072
Distribution to HFC for El Dorado tanks		(103)
Distributions to noncontrolling interests	0	0
Units withheld for tax withholding obligations	(58)	(35)
Other	0	0
Net cash used by financing activities	33,588	20,377
Increase (decrease) for the period	0	0
Beginning of period	2	2
End of period	2	2
Guarantor Restricted Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	182,983	122,025
Cash flows from investing activities
Additions to properties and equipment	(18,829)	(17,670)
Other Payments to Acquire Businesses	(6,831)
Distributions from UNEV in excess of earnings	3,407
Proceeds from sale of assets	196	635
Proceeds from Noncontrolling Interests		3,080
Distributions in excess of equity in earnings of equity investments	299	1,654
Net cash used for investing activities	(21,758)	(12,301)
Cash flows from financing activities
Net borrowings (repayments) under credit agreement	0	290,000
Net intercompany financing activities	(160,330)	(389,005)
Proceeds from Issuance of common units	(68)	251
Redemption of 6.5% Senior Notes		0
Distributions to HEP unitholders	0	0
Contributions from general partner	0	(77)
Distribution to HFC for El Dorado tanks		0
Distributions to noncontrolling interests	0	0
Units withheld for tax withholding obligations	0	0
Other	(698)	(730)
Net cash used by financing activities	(161,096)	(99,561)
Increase (decrease) for the period	129	10,163
Beginning of period	511	301
End of period	640	10,464
Non-Guarantor Non-Restricted Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	18,661	19,373
Cash flows from investing activities
Additions to properties and equipment	(5,910)	(2,854)
Other Payments to Acquire Businesses	0
Distributions from UNEV in excess of earnings	0
Proceeds from sale of assets	0	0
Proceeds from Noncontrolling Interests		0
Distributions in excess of equity in earnings of equity investments	0	0
Net cash used for investing activities	(5,910)	(2,854)
Cash flows from financing activities
Net borrowings (repayments) under credit agreement	0	0
Net intercompany financing activities	0	0
Proceeds from Issuance of common units	0	0
Redemption of 6.5% Senior Notes		0
Distributions to HEP unitholders	0	0
Contributions from general partner	0	0
Distribution to HFC for El Dorado tanks		0
Distributions to noncontrolling interests	(14,000)	(14,000)
Units withheld for tax withholding obligations	0	0
Other	0	0
Net cash used by financing activities	(14,000)	(14,000)
Increase (decrease) for the period	(1,249)	2,519
Beginning of period	7,263	3,354
End of period	6,014	5,873
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(7,093)	(7,420)
Cash flows from investing activities
Additions to properties and equipment	0	0
Other Payments to Acquire Businesses	0
Distributions from UNEV in excess of earnings	(3,407)
Proceeds from sale of assets	0	0
Proceeds from Noncontrolling Interests		(3,080)
Distributions in excess of equity in earnings of equity investments	0	0
Net cash used for investing activities	(3,407)	(3,080)
Cash flows from financing activities
Net borrowings (repayments) under credit agreement	0	0
Net intercompany financing activities	0	0
Proceeds from Issuance of common units	0	0
Redemption of 6.5% Senior Notes		0
Distributions to HEP unitholders	0	0
Contributions from general partner	0	0
Distribution to HFC for El Dorado tanks		0
Distributions to noncontrolling interests	10,500	10,500
Units withheld for tax withholding obligations	0	0
Other	0	0
Net cash used by financing activities	10,500	10,500
Increase (decrease) for the period	0	0
Beginning of period	0	0
End of period	$ 0	$ 0