Delek Logistics Partners (DKL) 10-Q 9 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 03, 2019
Entity Information [Line Items]
Entity Registrant Name	DELEK LOGISTICS PARTNERS, LP
Entity Central Index Key	0001552797
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Current Reporting Status	Yes
Common unitholders
Entity Information [Line Items]
Entity Partnership Units Outstanding		24,407,405
General Partner
Entity Information [Line Items]
Entity Partnership Units Outstanding		498,110

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 5,356	$ 4,522
Accounts receivable	21,538	21,586
Inventory	6,669	5,491
Other current assets	629	969
Total current assets	34,192	32,568
Property, plant and equipment:
Property, plant and equipment	453,591	452,746
Less: accumulated depreciation	(146,712)	(140,184)
Property, plant and equipment, net	306,879	312,562
Equity method investments	107,830	104,770
Operating lease right-of-use assets	19,186
Goodwill	12,203	12,203
Marketing Contract Intangible, net	136,407	138,210
Other non-current assets	23,511	24,280
Total assets	640,208	624,593
Current liabilities:
Accounts payable	5,511	14,226
Accounts payable to related parties	10,522	7,833
Excise and other taxes payable	4,496	4,069
Pipeline release liabilities	3,293	4,419
Current portion of operating lease liabilities	4,258
Accrued expenses and other current liabilities	10,940	5,958
Total current liabilities	39,020	36,505
Non-current liabilities:
Long-term debt	705,175	700,430
Asset retirement obligations	5,290	5,191
Operating lease liabilities, net of current portion	14,928
Other non-current liabilities	17,700	17,290
Total non-current liabilities	743,093	722,911
Deficit:
Total deficit	(141,905)	(134,823)
Total liabilities and deficit	640,208	624,593
Common unitholders | Common unitholders - public; 9,113,359 units issued and outstanding at March 31, 2019 (9,109,807 at December 31, 2018)
Deficit:
Total deficit	168,389	171,023
Common unitholders | Common unitholders - Delek Holdings; 15,294,046 units issued and outstanding at March 31, 2019 (15,294,046 at December 31, 2018)
Deficit:
Total deficit	(303,902)	(299,360)
General partner - 498,110 units issued and outstanding at March 31, 2019 (498,038 at December 31, 2018)
Deficit:
Total deficit	$ (6,392)	$ (6,486)

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - shares	Mar. 31, 2019	Dec. 31, 2018
General partner - Delek, units issued	498,110	498,038
Common unitholders - public
Common unitholders, units issued	9,113,359	9,109,807
Common unitholders - Delek
Common unitholders, units issued	15,294,046	15,294,046

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Net revenues:
Affiliates (1)	[1]	$ 62,965	$ 61,644
Third party		89,518	106,277
Total revenue		152,483	167,921
Cost of sales:
Cost of materials and other		96,265	119,032
Operating expenses (excluding depreciation and amortization presented below)		15,307	11,898
Depreciation and amortization		6,124	5,464
Cost of Revenue		117,696	136,394
Operating expenses (excluding depreciation and amortization presented below)		751	679
General and administrative expenses		4,473	2,975
Depreciation and amortization		450	536
Loss (gain) on asset disposals		2	60
Total operating costs and expenses		123,372	140,644
Operating income		29,111	27,277
Interest expense, net		11,301	8,062
(Income) from equity method investments		(1,951)	(858)
Total non-operating expenses, net		9,350	7,204
Income before income tax expense		19,761	20,073
Income tax expense		65	78
Net income attributable to partners		19,696	19,995
Comprehensive income attributable to partners		19,696	19,995
Less: General partner's interest in net income, including incentive distribution rights		7,270	5,630
Limited partners' interest in net income		$ 12,426	$ 14,365
Weighted average limited partner units outstanding:
Cash distributions per limited partner unit (in dollars per share)		$ 0.820	$ 0.750
Common Units
Net income per limited partner unit:
Common units - (basic) (in dollars per share)		0.51	0.59
Common units - (diluted) (in dollars per share)		$ 0.51	$ 0.59
Weighted average limited partner units outstanding:
Common units - (basic) (in shares)		24,407,168	24,382,633
Common units - (diluted) (in shares)		24,416,058	24,393,746
[1]	See Note 3

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Cash Flows ( Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 19,696	$ 19,995
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	6,574	6,000
Non-cash lease expense	1,016
Amortization of customer contract intangible assets	1,803	601
Amortization of deferred revenue	402	350
Amortization of deferred financing costs and debt discount	905	656
Accretion of asset retirement obligations	99	78
(Income) from equity method investments	(1,951)	(858)
Dividends from equity method investments	1,488	1,033
Loss on asset disposals	2	60
Unit-based compensation expense	144	147
Changes in assets and liabilities:
Accounts receivable	48	(2,352)
Inventories and other current assets	(838)	7,977
Accounts payable and other current liabilities	(5,177)	7,091
Accounts receivable/payable to related parties	2,689	(15,790)
Non-current assets and liabilities, net	109	(632)
Net cash provided by operating activities	26,205	23,656
Cash flows from investing activities:
Asset acquisitions, net of assumed asset retirement obligation liabilities	0	(72,376)
Purchases of property, plant and equipment	(1,181)	(3,253)
Proceeds from sales of property, plant and equipment	12	91
Purchases of intangible assets	0	(144,219)
Distributions from equity method investments	804	660
Equity method investment contributions	(3,401)	0
Net cash used in investing activities	(3,766)	(219,097)
Cash flows from financing activities:
Proceeds from issuance of additional units to maintain 2% General Partner interest	2	13
Distributions to general partner	(7,179)	(5,100)
Distributions to common unitholders - public	(7,352)	(6,590)
Distributions to common unitholders - Delek Holdings	(12,388)	(11,088)
Distributions to Delek Holdings unitholders and general partner related to Big Spring Logistic Assets Acquisition	0	(98,798)
Proceeds from revolving credit facility	119,000	409,200
Payments of revolving credit facility	(114,500)	(94,400)
Reimbursement of capital expenditures by Delek Holdings	812	2,316
Net cash (used in) provided by financing activities	(21,605)	195,553
Net increase in cash and cash equivalents	834	112
Cash and cash equivalents at the beginning of the period	4,522	4,675
Cash and cash equivalents at the end of the period	5,356	4,787
Cash paid during the period for:
Interest	5,997	3,009
Income taxes	58	0
Non-cash investing activities:
Decrease in accrued capital expenditures	(276)	$ (1,004)
Non-cash financing activities:
Non-cash lease liability arising from recognition of right of use assets upon adoption of ASU 2016-02	$ 20,202

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Cash Flows [Abstract]
General partner's ownership interest	2.00%	2.00%

Consolidated Statement of Partn

Consolidated Statement of Partners Equity (Deficit) Statement - USD ($) $ in Thousands	Total	General Partner	Common unitholders - publicLimited Partner	Common unitholders - DelekLimited Partner
Beginning balance at Dec. 31, 2017	$ (29,225)	$ (6,397)	$ 174,378	$ (197,206)
Cash distributions	(22,778)	(5,100)	(6,590)	(11,088)
Distributions to Delek Holdings for Big Spring Asset Acquisition	(98,798)	(1,976)		(96,822)
Net income attributable to partners	19,995	5,630	5,355	9,010
Unit-based compensation	147	2	54	91
Other	13	13	0	0
Ending balance at Mar. 31, 2018	(130,646)	(7,828)	173,197	(296,015)
Beginning balance at Dec. 31, 2018	(134,823)	(6,486)	171,023	(299,360)
Cash distributions	(26,919)	(7,179)	(7,352)	(12,388)
GP Units Issued to maintain 2% interest	2	2
Net income attributable to partners	19,696	7,270	4,664	7,762
Unit-based compensation	144	3	53	88
Other	(5)	(2)	1	(4)
Ending balance at Mar. 31, 2019	$ (141,905)	$ (6,392)	$ 168,389	$ (303,902)

Organization and Basis of Prese

Organization and Basis of Presentation	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	Organization and Basis of Presentation As used in this report, the terms "Delek Logistics Partners, LP," the "Partnership," "we," "us," or "our" may refer to Delek Logistics Partners, LP, one or more of its consolidated subsidiaries or all of them taken as a whole. The Partnership is a Delaware limited partnership formed in April 2012 by Delek US Holdings, Inc. ("Delek Holdings") and its subsidiary Delek Logistics GP, LLC, our general partner (our "general partner"). Effective March 1, 2018 , the Partnership, through its wholly-owned subsidiary DKL Big Spring, LLC, acquired from Delek Holdings certain logistics assets primarily located at or adjacent to Delek Holdings' refinery near Big Spring, Texas (the "Big Spring Refinery") and Delek Holdings' light products distribution terminal located in Stephens County, Oklahoma (collectively, the "Big Spring Logistic Assets" and such transaction the "Big Spring Logistic Assets Acquisition"). See Note 2 for further information regarding the Big Spring Logistic Assets Acquisition. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles ("U.S. GAAP") have been condensed or omitted, although management believes that the disclosures herein are adequate to make the financial information presented not misleading. Our unaudited condensed consolidated financial statements have been prepared in conformity with U.S. GAAP applied on a consistent basis with those of the annual audited financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2018 (our "Annual Report on Form 10-K"), filed with the Securities and Exchange Commission (the "SEC") on March 1, 2019. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2018 included in our Annual Report on Form 10-K. All adjustments necessary for a fair presentation of the financial position and the results of operations for the interim periods presented have been included. All intercompany accounts and transactions have been eliminated. Such intercompany transactions do not include those with Delek Holdings' or our general partner, which are presented as related parties in these accompanying condensed consolidated financial statements. All adjustments are of a normal, recurring nature. Operating results for the interim period should not be viewed as representative of results that may be expected for any future interim period or for the full year. Reclassifications Certain prior period amounts have been reclassified in order to conform to the current period presentation. Additionally, certain changes to presentation of the prior period statements of income have been made in order to conform to the current period presentation, primarily relating to the addition of a subtotal entitled 'cost of sales' which includes all costs directly attributable to the generation of the related revenue, as defined by GAAP, and the retitling of what was previously referred to as 'cost of goods sold' to 'cost of materials and other'. In connection with this change in presentation, we have revised our related accounting policy for 'Cost of Materials and Other and Operating Expenses' presented below. Cost of Materials and Other and Operating Expenses Cost of materials and other includes (i) all costs of purchased refined products, additives and related transportation of such products, (ii) costs associated with the operation of our trucking assets, which primarily include allocated employee costs and other costs related to fuel, truck leases and repairs and maintenance, (iii) the cost of pipeline capacity leased from a third-party, and (iv) gains and losses related to our commodity hedging activities. Operating expenses include the costs associated with the operation of owned terminals and pipelines and terminalling expense at third-party locations, excluding depreciation and amortization. These costs primarily include outside services, allocated employee costs, repairs and maintenance costs and energy and utility costs. Operating expenses related to the wholesale business are excluded from cost of sales because they primarily relate to costs associated with selling the products through our wholesale business. Depreciation and amortization is separately presented in our statement of income and disclosed by reportable segment in Note 11 . New Accounting Pronouncements Adopted During Q1 2019 Accounting Standard Update ("ASU") 2017-12, Derivatives and Hedging - Targeted Improvements to Accounting for Hedging Activities In August 2017, the Financial Accounting Standards Board (the "FASB") issued guidance to better align financial reporting for hedging activities with the economic objectives of those activities for both financial (e.g., interest rate) and commodity risks. The guidance was intended to create more transparency in the presentation of financial results, both on the face of the financial statements and in the footnotes, and simplify the application of hedge accounting guidance. This guidance is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Companies are required to apply the guidance on a modified retrospective transition method in which the cumulative effect of the change is recognized within equity in the consolidated balance sheet as of the date of adoption. We adopted this guidance on the effective date and the adoption did not have a material impact on our business, financial condition and results of operations. ASU 2016-02, Leases In February 2016, the FASB issued guidance that requires the recognition of a lease liability and a right-of-use asset, initially measured at the present value of the lease payments, in the statement of financial condition for all leases with terms longer than one year. The guidance was subsequently amended to consider the impact of practical expedients and provide additional clarifications. The guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We adopted the new lease standard on January 1, 2019. We elected the package of practical expedients which, among other things, allows us to carry forward the historical lease classification. For certain lease classes, we have elected the practical expedient not to separate lease and non-lease components, which allows us to combine the components if certain criteria are met. Further, we elected the optional transition method, which allows us to recognize a cumulative-effect adjustment to the opening balance sheet of retained earnings at the date of adoption and to not recast our comparative periods. We have not elected the hindsight practical expedients, which would have allowed us to use hindsight in determining the reasonably certain lease term. The adoption of the lease accounting guidance had no impact on January 1, 2019 retained earnings and resulted in the recognition of a $20.2 million lease liability and a corresponding right-of-use asset on our consolidated balance sheet. The adoption did not have a material impact on our consolidated income statement. See Note 16 for further information. Accounting Pronouncements Not Yet Adopted ASU 2018-13, Fair Value Measurement - Changes to the Disclosure Requirements for Fair Value Measurement In August 2018, the FASB issued guidance related to disclosure requirements for fair value measurements. The pronouncement eliminates, modifies and adds disclosure requirements for fair value measurements. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2019, with early adoption permitted. We expect to adopt this guidance on or before the effective date and do not expect adopting this new guidance will have a material impact on our business, financial condition or results of operations. ASU 2016-13, Financial Instruments - Measurement of Credit Losses on Financial Instruments

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2019
Acquisitions [Abstract]
Acquisitions	Acquisitions Big Spring Logistic Assets Acquisition Effective March 1, 2018 , the Partnership, through its wholly-owned subsidiary DKL Big Spring, LLC, acquired the Big Spring Logistic Assets from Delek Holdings, which are primarily located at or adjacent to the Big Spring Refinery. The total purchase price was $170.8 million , financed through borrowings under the Partnership’s revolving credit facility. The Big Spring Logistic Assets include: • Approximately 75 storage tanks and certain ancillary assets (such as tank pumps and piping) primarily located adjacent to the Big Spring Refinery; • An asphalt terminal and a light products terminal; • Certain crude oil and refined product pipelines; and • Other logistics assets, such as four underground saltwells used for natural gas liquids storage. In connection with the closing of the transaction, Delek Holdings, the Partnership and various of their respective subsidiaries entered into new contracts and amended certain existing contracts, including entering into new pipelines, storage and throughput facilities and asphalt services agreements. The transaction and related agreements were approved by the Conflicts Committee of the board of the Partnership's general partner, which is comprised solely of independent directors. See Note 3 for more detailed descriptions of these agreements. The Big Spring Logistic Assets Acquisition was considered a transaction between entities under common control. Accordingly, the Big Spring Logistic Assets were recorded at amounts based on Delek Holdings' historical carrying value as of the acquisition date. The excess of the cash paid over the historical carrying value of the assets acquired from Delek Holdings amounted to $98.8 million and was recorded as a reduction in equity. The historical carrying value of the Big Spring Logistic Assets as of the acquisition date was $72.0 million , which is net of $0.8 million of assumed asset retirement obligations. Prior periods have not been recast, as these assets did not constitute a business in accordance with ASU 2017-01, Clarifying the Definition of a Business. We capitalized approximately $0.4 million of acquisition costs related to the Big Spring Logistic Assets Acquisition during the three months ended March 31, 2018 . Marketing Contract Intangible Acquisition Additionally, concurrent with the Big Spring Logistic Assets Acquisition, Delek Holdings, the Partnership and various of their respective subsidiaries entered into a new marketing agreement, whereby the Partnership markets certain refined products produced at or sold from the Big Spring Refinery to various customers in return for a marketing fee (the "Marketing Contract Intangible Acquisition"). We recorded a related contract intangible asset in the amount of $144.2 million based on the amount paid to enter into the contract, which represents the fair value of the intangible asset. The contract intangible asset is amortized over a twenty year period as a component of net revenues from affiliates. The total consideration paid was financed through borrowings under the Partnership's revolving credit facility. This transaction and related marketing agreement were approved by the Conflicts Committee of the board of the Partnership's general partner, which is comprised solely of independent directors. See Note 3

Related Party Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2019
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Commercial Agreements The Partnership has a number of long-term, fee-based commercial agreements with Delek Holdings under which we provide various services, including crude oil gathering and crude oil, intermediate and refined products transportation and storage services, and marketing, terminalling and offloading services to Delek Holdings. Most of these agreements have an initial term ranging from five to ten years, which may be extended for various renewal terms at the option of Delek Holdings. In November 2017, Delek Holdings opted to renew certain of these agreements for subsequent five-year terms expiring in November 2022. In the case of our marketing agreement with Delek Holdings in respect to the Tyler Refinery, the initial term has been extended through 2026. The current term of certain of our agreements with Delek Holdings were required to be further extended pursuant to the amended and restated DKL Credit Facility (as defined in Note 7 ), which extensions were effective in the fourth quarter of 2018. The fees under each agreement are payable to us monthly by Delek Holdings or certain third parties to whom Delek Holdings has assigned certain of its rights and are generally subject to increase or decrease on July 1 of each year, by the amount of any change in various inflation-based indices, including the Federal Energy Regulatory Commission ("FERC") oil pipeline index or various iterations of the consumer price index ("CPI") and the producer price index ("PPI"); provided, however, that in no event will the fees be adjusted below the amount initially set forth in the applicable agreement. In most circumstances, if Delek Holdings or the applicable third party assignee fails to meet or exceed the minimum volume or throughput commitment during any calendar quarter, Delek Holdings, and not any third party assignee, will be required to make a quarterly shortfall payment to us equal to the volume of the shortfall multiplied by the applicable fee, subject to certain exceptions as specified in the applicable agreement. Carry-over of any volumes or revenue in excess of such commitment to any subsequent quarter is not permitted. Under each of these agreements, we are required to maintain the capabilities of our pipelines and terminals, such that Delek Holdings may throughput and/or store, as the case may be, specified volumes of crude oil, intermediate and refined products. To the extent that Delek Holdings is prevented by our failure to maintain such capacities from throughputting or storing such specified volumes for more than 30 days per year, Delek Holdings' minimum throughput commitment will be reduced proportionately and prorated for the portion of the quarter during which the specified throughput capacity was unavailable, and/or the storage fee will be reduced, prorated for the portion of the month during which the specified storage capacity was unavailable. Such reduction would occur even if actual throughput or storage amounts were below the minimum volume commitment levels. See our Annual Report on Form 10-K for a more complete description of our material commercial agreements and other agreements with Delek Holdings. Big Spring Pipeline, Storage and Throughput Facilities Agreement In connection with the Big Spring Logistic Assets Acquisition, Alon USA, LP, a Texas limited partnership and an indirect, wholly-owned subsidiary of Delek Holdings (“Alon USA, LP”), and DKL Big Spring, LLC, a Delaware limited liability company and a wholly-owned subsidiary of the Partnership, entered into the Pipelines, Storage and Throughput Facilities Agreement (Big Spring Refinery Logistic Assets and Duncan Terminal) (the “Logistics Agreement”). Under the Logistics Agreement, the Partnership will provide storage and throughput services for crude oil and refined petroleum products owned by Alon USA, LP or its assignee, at certain of the Big Spring Logistic Assets owned and operated by the Partnership. The Partnership will charge fees to Alon USA, LP based on throughput volumes received or delivered ranging from $0.05 to $0.66 per barrel and related storage fees depending on the type of service or product. The fees under the Logistics Agreement may be adjusted annually for inflation. The initial term of the Logistics Agreement is ten years ; the Partnership has a one-time option to extend the Logistics Agreement for up to five additional years; and the Logistics Agreement will continue on a year-to-year basis following such renewal term unless terminated by either party. Big Spring Asphalt Services Agreement In connection with the Big Spring Logistic Assets Acquisition, Alon USA, LP and the Partnership entered into the Big Spring Asphalt Services Agreement (the “Asphalt Services Agreement”). Under the Asphalt Services Agreement, the Partnership will provide asphalt storage and handling services at certain of the Big Spring Logistic Assets (such assets, the “Asphalt Facilities”). The Partnership will provide services to Alon USA, LP at the Asphalt Facilities and serve as bailee of all raw materials, and other hydrocarbons, used to make asphalt products owned by Alon USA, LP or its assignee held in the Asphalt Facilities. The Partnership will charge fees to Alon USA, LP based on throughput volumes delivered of $8.30 per barrel and related storage fees. The fees under the Asphalt Services Agreement may be adjusted annually for inflation. The initial term of the Asphalt Services Agreement is ten years ; the Partnership has a one-time option to extend the Asphalt Services Agreement for up to five additional years; and the Asphalt Services Agreement will continue on a year-to-year basis following such renewal term unless terminated by either party. Big Spring Marketing Agreement Concurrent with the Big Spring Logistic Assets Acquisition, Alon USA, LP and the Partnership entered into the Marketing Agreement (the “Marketing Agreement”). Under the Marketing Agreement, the Partnership will provide Alon USA, LP with services for the marketing and selling of certain refined petroleum products that are produced or sold from the Big Spring Refinery. The Partnership will charge Alon USA, LP fees for such marketing and selling services of $0.50 to $0.71 per barrel depending on the type of product. The fees under the Marketing Agreement may be adjusted annually for inflation. The initial term of the Marketing Agreement is ten years ; Alon USA, LP has a one-time option to extend the Marketing Agreement for up to five additional years; and the Marketing Agreement will continue on a year-to-year basis following such renewal term unless terminated by either party. Other Agreements with Delek Holdings In addition to the commercial agreements described above, the Partnership has entered into the following agreements with Delek Holdings: Omnibus Agreement The Partnership entered into an omnibus agreement with Delek Holdings, our general partner, Delek Logistics Operating, LLC, Lion Oil Company and certain of the Partnership's and Delek Holdings' other subsidiaries on November 7, 2012, which has been amended from time to time in connection with acquisitions from Delek (collectively, as amended, the "Omnibus Agreement"). The Omnibus Agreement governs the provision of certain operational services and reimbursement obligations, among other matters, between the Partnership and Delek Holdings, and obligates us to pay an annual fee of $ 3.9 million to Delek Holdings for its provision of centralized corporate services to the Partnership. Pursuant to the terms of the Omnibus Agreement, we were reimbursed by Delek Holdings for certain capital expenditures in the amount of $0.8 million and $2.3 million during the three months ended March 31, 2019 and 2018 , respectively. These amounts are recorded in other long-term liabilities and are amortized to revenue over the life of the underlying revenue agreement corresponding to the asset. Ad ditionally, we are reimbursed or indemnified, as the case may be, for costs incurred in excess of certain amounts related to certain asset failures, pursuant to the terms of the Omnibus Agreeme nt. As of March 31, 2019 , we have recorded a receivable from related parties of $1.5 million for these matters for which we expect to be reimbursed. These reimbursements are recorded as reductions to operating expense. We were reimbursed $3.5 million for these matters during the three months ended March 31, 2019 . We had no reimbursements for such matters during the three months ended March 31, 2018 . Other Transactions Starting in 2018, the Partnership manages a long-term capital project on behalf of Delek Holdings pursuant to a construction management and operating agreement (the "DPG Management Agreement") for the construction of a 250-mile gathering system in the Permian Basin (the "Delek Permian Gathering Project"). The Partnership is also considered the operator for the project and is responsible for oversight of the project design, procurement and construction of project segments and provide other related services. Pursuant to the terms of the DPG Management Agreement, the Partnership receives a monthly operating services fee and a construction services fee, which includes the Partnership's direct costs of managing the project plus an additional percentage fee of the construction costs of each project segment. The agreement extends through December 2022. Total fees paid to the Partnership for the three months ended March 31, 2019 were $1.9 million . Additionally, the Partnership incurs the costs in connection with the construction of the assets and is subsequently reimbursed by Delek Holdings. Amounts reimbursable by Delek Holdings are recorded in accounts receivable from related parties. Summary of Transactions Revenues from affiliates consist primarily of revenues from gathering, transportation, storage, offloading, Renewable Identification Numbers, wholesale marketing and products terminalling services provided primarily to Delek Holdings based on regulated tariff rates or contractually based fees and product sales. Affiliate operating expenses are primarily comprised of amounts we reimburse Delek Holdings, or our general partner, as the case may be, for the services provided to us under the Partnership Agreement. These expenses could also include reimbursement and indemnification amounts from Delek Holdings, as provided under the Omnibus Agreement. Additionally, the Partnership is required to reimburse Delek Holdings for direct or allocated costs and expenses incurred by Delek Holdings on behalf of the Partnership and for charges Delek Holdings incurred for the management and operation of our logistics assets, including an annual fee for various centralized corporate services, which are included in general and administrative expenses. In addition to these transactions, we purchase refined products and bulk biofuels from Delek Holdings, the costs of which are included in cost of materials and other. A summary of revenue, purchases from affiliates and expense transactions with Delek Holdings and its affiliates are as follows (in thousands): Three Months Ended March 31, 2019 2018 Revenues $ 62,965 $ 61,644 Purchases from Affiliates $ 79,434 $ 83,401 Operating and maintenance expenses $ 9,925 $ 7,489 General and administrative expenses $ 1,370 $ 957 Quarterly Cash Distributions Our common and general partner unitholders and the holders of Incentive Distribution Rights ("IDRs") are entitled to receive quarterly distributions of available cash as it is determined by the board of directors of our general partner in accordance with the terms and provisions of our Partnership Agreement. In February 2019 , we paid quarterly cash distributions of $26.9 million , of which $19.6 million were paid to Delek Holdings and our general partner. In February 2018 , we paid quarterly cash distributions of $22.8 million , of which $16.2 million were paid to Delek Holdings and our general partner. On April 26, 2019 , our general partner's board of directors declared a quarterly cash distribution totaling $27.4 million , based on the available cash as of the date of determination for the end of the first quarter of 2019 , payable on May 14, 2019 , of which $20.0 million is expected to be paid to Delek Holdings and our general partner, including the distribution as holder of the IDRs described in Note 8

Revenues (Notes)

Revenues (Notes)	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Revenues	Revenues We generate revenue by charging fees for gathering, transporting, offloading and storing crude oil; for storing intermediate products and feed stocks; for distributing, transporting and storing refined products; for marketing refined products output of Delek Holdings' Tyler and Big Spring refineries; and for wholesale marketing in the west Texas area. A significant portion of our revenue is derived from long-term commercial agreements with Delek Holdings, which provide for annual fee adjustments for increases or decreases in the CPI, PPI or FERC index (refer to Note 3 for a more detailed description of these agreements). In addition to the services we provide to Delek Holdings, we also generate substantial revenue from crude oil, intermediate and refined products transportation services for, and terminalling and marketing services to, third parties primarily in Texas, New Mexico, Tennessee and Arkansas. Certain of these services are provided pursuant to contractual agreements with third parties. Payment terms require customers to pay shortly after delivery and do not contain significant financing components. The majority of our commercial agreements with Delek Holdings meet the definition of a lease because: (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 Delek Holdings will take more than a minor amount of the output associated with the specified property, plant or equipment. As part of our adoption of ASC 842, Leases ("ASC 842"), we applied the permitted practical expedient to not separate lease and non-lease components under the predominance principle to designated asset classes associated with the provision of logistics services. We have determined that the predominant component of the related agreements currently in effect is the lease component. Therefore, the combined component is accounted for under the applicable lease accounting guidance. Of our $306.9 million net property, plant, and equipment balance as of March 31, 2019 , $257.7 million is subject to operating leases under our commercial agreements. These agreements do not include options for the lessee to purchase our leasing equipment, nor do they include any material residual value guarantees or material restrictive covenants. The following table represents a disaggregation of revenue for each reportable segment for the periods indicated (in thousands): Three Months Ended March 31, 2019 Pipelines and Transportation Wholesale Marketing and Terminalling Consolidated Service Revenue - Third Party $ 3,974 $ 120 $ 4,094 Product Revenue - Third Party — 85,424 85,424 Product Revenue - Affiliate — 9,386 9,386 Lease Revenue - Affiliate (1) 36,659 16,920 53,579 Total Revenue $ 40,633 $ 111,850 $ 152,483 (1) Net of $1.8 million of amortization expense for the three months ended related to a customer contract intangible asset recorded in the wholesale marketing and terminalling segment. As of March 31, 2019 , we expect to recognize $1.1 billion in service and lease revenues related to our unfulfilled performance obligations pertaining to the minimum volume commitments and capacity utilization under the non-cancelable terms of our commercial agreements with Delek Holdings. Most of these agreements have an initial term ranging from five to ten years, which may be extended for various renewal terms. We disclose information about remaining performance obligations that have original expected durations of greater than one year. Our unfulfilled performance obligations as of March 31, 2019 were as follows (in thousands): Remainder of 2019 $ 126,236 2020 167,965 2021 167,714 2022 166,587 2023 and thereafter 474,200 Total expected revenue on remaining performance obligations $ 1,102,702

Inventory

Inventory	3 Months Ended
	Mar. 31, 2019
Inventory Disclosure [Abstract]
Inventory	Inventory Inventories consisted of $6.7 million and $5.5 million of refined petroleum products as of March 31, 2019 and December 31, 2018 , respectively. Inventory is stated at the lower of cost or net realizable value, with cost determined on a first-in, first-out basis. We recognize lower of cost or net realizable value charges as a component of cost of materials and other in the consolidated statements of income and comprehensive income, which amounted to a nominal amount during the three months ended March 31, 2019 and 2018

Long-Term Obligations

Long-Term Obligations	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Long-Term Obligations	Long-Term Obligations DKL Credit Facility Prior to September 28, 2018, the Partnership had a $700.0 million senior secured revolving credit agreement with Fifth Third Bank ("Fifth Third"), as administrative agent, and a syndicate of lenders (the "2014 Facility") bearing interest at (i) either a U.S. prime dollar rate or a LIBOR Rate for borrowings denominated in U.S. Dollars, or (ii) either a Canadian dollar prime rate, or a Canadian Dealer Offered Rate, for borrowings denominated in Canadian dollars (in each case plus applicable margins, at the election of the borrowers and as a function of draw down currency). The 2014 Facility had a maturity date of December 30, 2019. The obligations under the 2014 Facility were secured by a first priority lien on substantially all of the Partnership's tangible and intangible assets. Additionally, a subsidiary of Delek Holdings provided a limited guaranty of the Partnership's obligations under the 2014 Facility. On September 28, 2018, the Partnership entered into a third amended and restated senior secured revolving credit agreement, which amended and restated the 2014 Facility (hereafter, the "DKL Credit Facility") with Fifth Third Bank, as administrative agent, and a syndicate of lenders. The DKL Credit Facility contains a dual currency borrowing tranche that permits draw downs in U.S. or Canadian dollars. Under the terms of the DKL Credit Facility, among other things, the lender commitments were increased from $700.0 million to $850.0 million . The DKL Credit Facility also contains an accordion feature whereby the Partnership can increase the size of the credit facility to an aggregate of $1.0 billion , subject to receiving increased or new commitments from lenders and the satisfaction of certain other conditions precedent. The obligations under the DKL Credit Facility remain secured by first priority liens on substantially all of the Partnership's and its subsidiaries' tangible and intangible assets. Additionally, Delek Marketing & Supply, LLC ("Delek Marketing"), a subsidiary of Delek Holdings, continues to provide a limited guaranty of the Partnership's obligations under the DKL Credit Facility. Delek Marketing's guaranty is (i) limited to an amount equal to the principal amount, plus unpaid and accrued interest, of a promissory note made by Delek Holdings in favor of Delek Marketing (the "Holdings Note") and (ii) secured by Delek Marketing's pledge of the Holdings Note to the lenders under the DKL Credit Facility. As of March 31, 2019 the principal amount of the Holdings Note was $102.0 million . The DKL Credit Facility has a maturity date of September 28, 2023 . Borrowings denominated in U.S. dollars bear interest at either a U.S. dollar prime rate , plus an applicable margin, or the London Interbank Offered Rate (" LIBOR "), plus an applicable margin, at the election of the borrowers. Borrowings denominated in Canadian dollars bear interest at either a Canadian dollar prime rate , plus an applicable margin, or the Canadian Dealer Offered Rate , plus an applicable margin, at the election of the borrowers. The applicable margin in each case and the fee payable for the unused revolving commitments vary based upon the Partnership's most recent total leverage ratio calculation delivered to the lenders, as called for and defined under the terms of the DKL Credit Facility. At March 31, 2019 , the weighted average interest rate for our borrowings under the facility was approximately 5.1% . Additionally, the DKL Credit Facility requires us to pay a leverage ratio dependent quarterly fee on the average unused revolving commitment. As of March 31, 2019 , this fee was 0.40% per year. As of March 31, 2019 , we had $461.2 million of outstanding borrowings under the DKL Credit Facility, with no letters of credit in place. Unused credit commitments under the DKL Credit Facility as of March 31, 2019 , were $388.8 million . 6.750% Senior Notes Due 2025 On May 23, 2017 , the Partnership and Delek Logistics Finance Corp., a Delaware corporation and a wholly-owned subsidiary of the Partnership (“Finance Corp.” and together with the Partnership, the “Issuers”), issued $250.0 million in aggregate principal amount of 6.75% senior notes due 2025 (the “2025 Notes”) at a discount. The 2025 Notes are general unsecured senior obligations of the Issuers. The 2025 Notes are unconditionally guaranteed jointly and severally on a senior unsecured basis by the Partnership's existing subsidiaries (other than Finance Corp., the "Guarantors") and will be unconditionally guaranteed on the same basis by certain of the Partnership’s future subsidiaries. The 2025 Notes rank equal in right of payme nt with all existing and future senior indebtedness of the Issuers, and senior in right of payment to any future subordinated indebtedness of the Issuers. Interest on the 2025 Notes is payable semi-annually in arrears on each May 15 and November 15, commencing November 15, 2017. At any time prior to May 15, 2020, the Issuers may redeem up to 35% of the aggregate principal amount of the 2025 Notes with the net cash proceeds of one or more equity offerings by the Partnership at a redemption price of 106.750% of the redeemed principal amount, plus accrued and unpaid interest, if any, subject to certain conditions and limitations. Prior to May 15, 2020, the Issuers may redeem all or part of the 2025 Notes at a redemption price of the principal amount, plus accrued and unpaid interest, if any, plus a "make whole" premium, subject to certain conditions and limitations. In addition, beginning on May 15, 2020, th e Issuers may, subject to certain conditions and limitations, redeem all or part of the 2025 Notes at a redemption price of 105.063% of the redeemed principal for the twelve-month period beginning on May 15, 2020, 103.375% for the twelve-month period beginning on May 15, 2021, 101.688% for the twelve-month period beginning on May 15, 2022 and 100.00% beginning on May 15, 2023 and thereafter, plus accrued and unpaid interest, if any. In the event of a change of control, accompanied or followed by a ratings downgrade within a certain period of time, subject to certain conditions and limitations, the Issuers will be obligated to make an offer for the purchase of the 2025 Notes from holders at a price equal to 101% of the principal amount thereof, plus accrued and unpaid interest. In May 2018, the 2025 Notes were exchanged for new notes with terms substantially identical in all material respects with the 2025 Notes except that the new notes do not contain terms with respect to transfer restrictions. As of March 31, 2019 , we had $250.0 million in outstanding principal amount of the 2025 Notes. Outstanding borrowings under the 2025 Notes are net of deferred financing costs and debt discount of $4.6 million and $1.4 million , respectively, as of March 31, 2019 , and $4.8 million and $1.5 million , respectively, as of December 31, 2018

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For tax purposes, each partner of the Partnership is required to take into account its share of income, gain, loss and deduction in computing its federal and state income tax liabilities, regardless of whether cash distributions are made to such partner by the Partnership. The taxable income reportable to each partner takes into account differences between the tax basis and fair market value of our assets, the acquisition price of such partner's units and the taxable income allocation requirements under our Partnership Agreement.

Net Income Per Unit

Net Income Per Unit	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Net Income Per Unit	Net Income Per Unit We use the two-class method when calculating the net income per unit applicable to limited partners because we have more than one participating class of securities. Our participating securities consist of common units, general partner units and IDRs. The two-class method is based on the weighted-average number of common units outstanding during the period. Basic net income per unit applicable to limited partners is computed by dividing limited partners’ interest in net income, after deducting our general partner’s 2% interest and IDRs, by the weighted-average number of outstanding common units. Our net income is allocated to our general partner and limited partners in accordance with their respective partnership percentages after giving effect to priority income allocations for IDRs, which are held by our general partner pursuant to our Partnership Agreement. The IDRs are paid following the close of each quarter. Earnings in excess of distributions are allocated to our general partner and limited partners based on their respective ownership interests. Payments made to our unitholders are determined in relation to actual distributions declared and are not based on the net income allocations used in the calculation of net income per unit. Diluted net income per unit applicable to common limited partners includes the effects of potentially dilutive units on our common units. As of March 31, 2019 , the only potentially dilutive units outstanding consist of unvested phantom units. Our distributions earned with respect to a given period are declared subsequent to quarter end. Therefore, the table below represents total cash distributions applicable to the period in which the distributions are earned. The expected date of distribution for the distributions earned during the period ended March 31, 2019 is May 14, 2019 . The calculation of net income per unit is as follows (dollars in thousands, except units and per unit amounts): Three Months Ended March 31, 2019 2018 Net income attributable to partners $ 19,696 $ 19,995 Less: General partner's distribution (including IDRs) (1) 7,424 5,710 Less: Limited partners' distribution 20,014 18,287 Distributions in excess of earnings $ (7,742 ) $ (4,002 ) General partner's earnings: Distributions (including IDRs) (1) $ 7,424 $ 5,710 Allocation of distributions in excess of earnings (154 ) (80 ) Total general partner's earnings $ 7,270 $ 5,630 Limited partners' earnings on common units: Distributions $ 20,014 $ 18,287 Allocation of distributions in excess of earnings (7,588 ) (3,922 ) Total limited partners' earnings on common units $ 12,426 $ 14,365 Weighted average limited partner units outstanding (2) : Common units - (basic) 24,407,168 24,382,633 Common units - (diluted) 24,416,058 24,393,746 Net income per limited partner unit (2) : Common units - (basic) $ 0.51 $ 0.59 Common units - (diluted) (3) $ 0.51 $ 0.59 (1) General partner distributions (including IDRs) consist of the 2.0% general partner interest and IDRs, which represent the right of the general partner to receive increasing percentages of quarterly distributions of available cash from operating surplus in excess of 0.43125 per unit per quarter. See Note 8 for further discussion related to IDRs. (2) We base our calculation of net income per unit on the weighted-average number of common limited partner units outstanding during the period. (3) There were no outstanding common units excluded from the diluted earnings per unit calculation for the three months ended March 31, 2019 and 2018 .

Equity

Equity	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Equity	Equity We had 9,113,359 common limited partner units held by the public outstanding as of March 31, 2019 . Additionally, as of March 31, 2019 , Delek Holdings owned a 61.4% limited partner interest in us, consisting of 15,294,046 common limited partner units and a 94.6% interest in our general partner, which owns the entire 2.0% general partner interest consisting of 498,110 general partner units. Affiliates, who are also members of our general partner's management and board of directors, own the remaining 5.4% interest in our general partner. Equity Activity The table below summarizes the changes in the number of units outstanding from December 31, 2018 through March 31, 2019 . Common - Public Common - Delek Holdings General Partner Total Balance at December 31, 2018 9,109,807 15,294,046 498,038 24,901,891 General partner units issued to maintain 2% interest — — 72 72 Unit-based compensation awards (1) 3,552 — — 3,552 Balance at March 31, 2019 9,113,359 15,294,046 498,110 24,905,515 (1) No units were withheld for taxes during the three months ended March 31, 2019 . Issuance of Additional Securities Our Partnership Agreement authorizes us to issue an unlimited number of additional partnership securities for the consideration and on the terms and conditions determined by our general partner without the approval of the unitholders. Costs associated with the issuance of securities are allocated to all unitholders' capital accounts based on their ownership interest at the time of issuance. Allocations of Net Income Our Partnership Agreement contains provisions for the allocation of net income and loss to the unitholders and our general partner. For purposes of maintaining partner capital accounts, the Partnership Agreement specifies that items of income and loss shall be allocated among the partners in accordance with their respective percentage interest. Normal allocations according to percentage interests are made after giving effect to priority income allocations in an amount equal to incentive cash distributions allocated 100% to our general partner. The following table presents the allocation of the general partner's interest in net income (in thousands, except percentage of ownership interest): Three Months Ended March 31, 2019 2019 2018 Net income attributable to partners 19,696 $ 19,995 Less: General partner's IDRs (7,016 ) (5,337 ) Net income available to partners $ 12,680 $ 14,658 General partner's ownership interest 2.0 % 2.0 % General partner's allocated interest in net income 254 $ 293 General partner's IDRs 7,016 5,337 Total general partner's interest in net income $ 7,270 $ 5,630 Incentive Distribution Rights Our general partner is currently entitled to 2.0% of all quarterly distributions that we make prior to our liquidation. Our general partner has the right, but not the obligation, to contribute up to a proportionate amount of capital to us to maintain its current general partner interest. The general partner's 2.0% interest in these distributions may be reduced if we issue additional units in the future and our general partner does not contribute a proportionate amount of capital to us to maintain its 2.0% general partner interest. Our general partner also currently holds IDRs that entitle it to receive increasing percentages, up to a maximum of 48.0% , of the cash we distribute from operating surplus (as defined in our Partnership Agreement) in excess of 0.43125 per unit per quarter. The maximum distribution is 48.0% and does not include any distributions that our general partner or its affiliates may receive on common or general partner units that it owns. The IDRs held by our general partner currently entitle it to receive the maximum distribution. Cash Distributions Our Partnership Agreement sets forth the calculation to be used to determine the amount and priority of available cash distributions that our limited partner unitholders and general partner will receive. Our distributions earned with respect to a given period are declared subsequent to quarter end. The table below summarizes the quarterly distributions related to our quarterly financial results: Quarter Ended Total Quarterly Distribution Per Limited Partner Unit Total Quarterly Distribution Per Limited Partner Unit, Annualized Total Cash Distribution, including general partner interest and IDRs (in thousands) Date of Distribution Unitholders Record Date March 31, 2018 $ 0.750 $ 3.00 $ 23,997 May 15, 2018 May 7, 2018 June 30, 2018 $ 0.770 $ 3.08 $ 24,984 August 13, 2018 August 3, 2018 September 30, 2018 $ 0.790 $ 3.16 $ 25,960 November 9, 2018 November 2, 2018 December 31, 2018 $ 0.810 $ 3.24 $ 26,949 February 12, 2019 February 4, 2019 March 31, 2019 $ 0.820 $ 3.28 $ 27,438 May 14, 2019 (1) May 7, 2019 (1) Expected date of distribution. The allocations of total quarterly cash distributions made to general and limited partners for the three months ended March 31, 2019 and 2018 are set forth in the table below. Distributions earned with respect to a given period are declared subsequent to quarter end. Therefore, the table below presents total cash distributions applicable to the period in which the distributions are earned (in thousands, except per unit amounts): Three Months Ended March 31, 2019 2018 General partner's distributions: General partner's distributions $ 408 $ 373 General partner's IDRs 7,016 5,337 Total general partner's distributions 7,424 5,710 Limited partners' distributions: Common limited partners' distributions 20,014 18,287 Total cash distributions $ 27,438 $ 23,997 Cash distributions per limited partner unit $ 0.820 $ 0.750

Equity Based Compensation

Equity Based Compensation	3 Months Ended
	Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity Based Compensation	Equity Based Compensation We incurred approximately $0.1 million of unit-based compensation expense related to the Partnership during both the three months ended March 31, 2019 and 2018 . These amounts are included in general and administrative expenses in the accompanying condensed consolidated statements of income and comprehensive income. The fair value of phantom unit awards under the Delek Logistics GP, LLC 2012 Long-Term Incentive Plan (the "LTIP") is determined based on the closing market price of our common limited partner units on the grant date. The estimated fair value of our phantom units is amortized over the vesting period using the straight line method. Awards vest over one- to five-year service periods, unless such awards are amended in accordance with the LTIP. As of March 31, 2019 , there was $0.1 million of total unrecognized compensation cost related to non-vested equity-based compensation arrangements, which is expected to be recognized over a weighted-average period of 0.2

Equity Method Investments

Equity Method Investments	3 Months Ended
	Mar. 31, 2019
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	Equity Method Investments We have two joint ventures that have constructed separate crude oil pipeline systems and related ancillary assets, which are serving third parties and subsidiaries of Delek Holdings. We own a 50% membership interest in the entity formed with an affiliate of Plains All American Pipeline, L.P. ("CP LLC") to operate one of these pipeline systems and a 33% membership interest in the entity formed with Rangeland Energy II, LLC ("Rangeland Energy") to operate the other pipeline system. During 2018, Rangeland Energy was acquired by Andeavor and the legal entity in which we have an equity investment became Andeavor Logistics RIO Pipeline LLC ("Andeavor Logistics"). The Partnership's investments in these two entities were financed through a combination of cash from operations and borrowings under our senior secured revolving credit agreement. As of March 31, 2019 and December 31, 2018 , the Partnership's investment balance in these joint ventures was $107.8 million and $104.8 million , respectively. We do not consolidate any part of the assets or liabilities or operating results of our equity method investees. Our share of net income or loss of the investees will increase or decrease, as applicable, the carrying value of our investments in unconsolidated affiliates. With respect to CP LLC and Andeavor Logistics, we determined that these entities do not represent variable interest entities and consolidation is not required. We have the ability to exercise significant influence over each of these joint ventures through our participation in the management committees, which make all significant decisions. However, since all significant decisions require the consent of the other investor(s) without regard to economic interest, we have determined that we have joint control and have applied the equity method of accounting. Our investment in these joint ventures is reflected in our pipelines and transportation segment. Summarized Financial Information Combined summarized financial information for 100% of our equity method investees is shown below (in thousands): March 31, 2019 December 31, 2018 Current assets $ 21,948 $ 15,450 Non-current assets $ 250,977 $ 240,852 Current liabilities $ 12,719 $ 4,362 Three Months Ended March 31, 2019 2018 Revenues $ 9,114 $ 7,990 Gross profit $ 4,894 $ 3,234 Net Income $ 4,417 $ 2,712

Segment Data

Segment Data	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Segment Data	Segment Data We aggregate our operating segments into two reportable segments: (i) pipelines and transportation and (ii) wholesale marketing and terminalling: • The assets and investments reported in the pipelines and transportation segment provide crude oil gathering and crude oil, intermediate and refined products transportation and storage services to Delek Holdings' refining operations and independent third parties. • The wholesale marketing and terminalling segment provides wholesale marketing and terminalling services to Delek Holdings' refining operations and independent third parties. Our operating segments adhere to the accounting policies used for our consolidated financial statements. Our operating segments are managed separately because each segment requires different industry knowledge, technology and marketing strategies. Decisions concerning the allocation of resources and assessment of operating performance are made based on this segmentation. Management measures the operating performance of each of its reportable segments based on segment contribution margin. Segment contribution margin is defined as net revenues less cost of materials and other and operating expenses, excluding depreciation and amortization. The following is a summary of business segment operating performance as measured by contribution margin for the periods indicated (in thousands): Three Months Ended March 31, 2019 2018 Pipelines and Transportation Net revenues: Affiliate $ 36,659 $ 29,462 Third party 3,974 4,251 Total pipelines and transportation 40,633 33,713 Cost of materials and other 5,567 4,441 Operating expenses (excluding depreciation and amortization) 10,834 9,622 Segment contribution margin $ 24,232 $ 19,650 Capital spending (1) 424 $ 1,408 Wholesale Marketing and Terminalling Net revenues: Affiliate (2) $ 26,306 $ 32,182 Third party 85,544 102,026 Total wholesale marketing and terminalling 111,850 134,208 Cost of materials and other 90,698 114,591 Operating expenses (excluding depreciation and amortization) 5,224 2,955 Segment contribution margin $ 15,928 $ 16,662 Capital spending (1) 480 $ 789 Consolidated Net revenues: Affiliate $ 62,965 $ 61,644 Third party 89,518 106,277 Total Consolidated 152,483 167,921 Cost of materials and other 96,265 119,032 Operating expenses (excluding depreciation and amortization presented below) 16,058 12,577 Contribution margin 40,160 36,312 General and administrative expenses 4,473 2,975 Depreciation and amortization 6,574 6,000 Loss (gain) on asset disposals 2 60 Operating income $ 29,111 $ 27,277 Capital spending (1) 904 $ 2,197 (1) Capital spending excludes transaction costs capitalized in the amount of $0.4 million that relate to the Big Spring Logistic Assets Acquisition for the three months ended March 31, 2018 . (2) Affiliate revenue for the wholesale marketing and terminalling segment is presented net of amortization expense pertaining to the Marketing Contract Intangible Acquisition. See Note 3 for additional information. The following table summarizes the total assets for each segment as of March 31, 2019 and December 31, 2018 (in thousands): March 31, 2019 December 31, 2018 Pipelines and transportation $ 401,833 $ 387,333 Wholesale marketing and terminalling 238,375 237,260 Total assets $ 640,208 $ 624,593 Property, plant and equipment and accumulated depreciation as of March 31, 2019 and depreciation expense by reporting segment for the three months ended March 31, 2019 were as follows (in thousands): Pipelines and Transportation Wholesale Marketing and Terminalling Consolidated Property, plant and equipment $ 359,213 $ 94,378 $ 453,591 Less: accumulated depreciation (112,170 ) (34,542 ) (146,712 ) Property, plant and equipment, net $ 247,043 $ 59,836 $ 306,879 Depreciation expense for the three months ended March 31, 2019 $ 5,241 $ 1,333 $ 6,574 In accordance with ASC 360, Property, Plant & Equipment , we evaluate the realizability of property, plant and equipment as events occur that might indicate potential impairment. There were no indicators of impairment of our property, plant and equipment as of March 31, 2019

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The fair values of financial instruments are estimated based upon current market conditions and quoted market prices for the same or similar instruments. Management estimates that the carrying value approximates fair value for all of our assets and liabilities that fall under the scope of ASC 825, Financial Instruments . We apply the provisions of ASC 820, Fair Value Measurements ("ASC 820"), which defines fair value, establishes a framework for its measurement and expands disclosures about fair value measurements. ASC 820 applies to commodity derivatives that are measured at fair value on a recurring basis. The standard also requires that we assess the impact of nonperformance risk on our derivatives. Nonperformance risk is not considered material to our financial statements at this time. ASC 820 requires disclosures that categorize assets and liabilities measured at fair value into one of three different levels depending on the observability of the inputs employed in the measurement. Level 1 inputs are quoted prices in active markets for identical assets or liabilities. Level 2 inputs are observable inputs other than quoted prices included within Level 1 for the asset or liability, either directly or indirectly through market-corroborated inputs. Level 3 inputs are unobservable inputs for the asset or liability reflecting our assumptions about pricing by market participants. Commodity swaps, exchange-traded futures, physical commodity forward purchase and sale contracts are generally valued using industry-standard models that consider various assumptions, including quoted forward prices, spot prices, interest rates, time value, volatility factors and contractual prices for the underlying instruments, as well as other relevant economic measures. The degree to which these inputs are observable in the forward markets determines the classification as Level 2 or 3. Our contracts are valued based on exchange pricing and/or price index developers such as Platts or Argus and are, therefore, classified as Level 2. The fair value hierarchy for our financial assets and liabilities accounted for at fair value on a recurring basis at March 31, 2019 and December 31, 2018 was as follows (in thousands): March 31, 2019 Level 1 Level 2 Level 3 Total Assets Commodity derivatives $ — $ 61 $ — $ 61 Total assets — 61 — 61 Liabilities Commodity derivatives — (87 ) — (87 ) Net liabilities $ — $ (26 ) $ — $ (26 ) December 31, 2018 Level 1 Level 2 Level 3 Total Assets Commodity derivatives $ — $ 186 $ — $ 186 Total assets — 186 — 186 Liabilities Commodity derivatives — (2 ) — (2 ) Net liabilities $ — $ 184 $ — $ 184 The derivative values above are based on analysis of each contract as the fundamental unit of account as required by ASC 820. In the table above, derivative assets and liabilities with the same counterparty are not netted where the legal right of offset exists. This differs from the presentation in the financial statements which reflects our policy, wherein we have elected to offset the fair value amounts recognized for multiple derivative instruments executed with the same counterparty and where the legal right of offset exists. As of March 31, 2019 and December 31, 2018 , we had a cash collateral of $0.3 million and $0.4 million , respectively, netted with the net derivative position of our counterparty. See Note 13

Derivative Instruments

Derivative Instruments	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments From time to time, we enter into forward fuel contracts to limit the exposure to price fluctuations for physical purchases of refined products in the normal course of business. We use derivatives to reduce the impact of market price volatility on our results of operations. Typically, we enter into forward fuel contracts with major financial institutions in which we fix the purchase price of refined grade fuel for a predetermined number of units with fulfillment terms of less than 90 days. The following table presents the fair value of our derivative instruments as of March 31, 2019 and December 31, 2018 . The fair value amounts below are presented on a gross basis and do not reflect the netting of asset and liability positions permitted under our master netting arrangements, including any cash deficit or collateral on deposit with our counterparties. We have elected to offset the recognized fair value amounts for multiple derivative instruments executed with the same counterparty in our financial statements. As a result, the asset and liability amounts below differ from the amounts presented in our accompanying condensed consolidated balance sheets. During the three months ended March 31, 2019 and 2018 , we did not elect hedge accounting treatment for these derivative positions. As a result, all changes in fair value are marked to market in the accompanying condensed consolidated statements of income and comprehensive income. See Note 12 for further information regarding the fair value of derivative instruments. (in thousands) March 31, 2019 December 31, 2018 Derivative Type Balance Sheet Location Assets Liabilities Assets Liabilities Derivatives: Commodity derivatives (1) Other current assets $ 61 $ (87 ) $ 186 $ (2 ) Total gross fair value of derivatives 61 (87 ) 186 (2 ) Less: Counterparty netting and cash deficit (collateral) (2) (183 ) (87 ) (404 ) (2 ) Total net fair value of derivatives $ 244 $ — $ 590 $ — (1) As of March 31, 2019 and December 31, 2018 , we had open derivative contracts representing 68,000 barrels and 82,000 barrels, respectively, of refined petroleum products. (2) As of March 31, 2019 and December 31, 2018 , we had a cash collateral of $0.3 million and $0.4 million , respectively, netted with the net derivative position of our counterparty. Recognized gains (losses) associated with our derivatives for the three months ended March 31, 2019 and 2018 were as follows (in thousands): Three Months Ended March 31, Derivative Type Income Statement Location 2019 2018 Commodity derivatives Cost of materials and other $ (1,014 ) $ 1,583

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Litigation In the ordinary conduct of our business, we are from time to time subject to lawsuits, investigations and claims, including environmental claims and employee-related matters. Although we cannot predict with certainty the ultimate resolution of lawsuits, investigations and claims asserted against us, including civil penalties or other enforcement actions, we do not believe that any currently pending legal proceeding or proceedings to which we are a party will have a material adverse effect on our financial statements. See "Crude Oil Releases" below for discussion of an enforcement action. Environmental, Health and Safety We are subject to extensive federal, state and local environmental and safety laws and regulations enforced by various agencies, including the Environmental Protection Agency (the "EPA"), the United States Department of Transportation, the Occupational Safety and Health Administration, as well as numerous state, regional and local environmental, safety and pipeline agencies. These laws and regulations govern the discharge of materials into the environment, waste management practices and pollution prevention measures, as well as the safe operation of our pipelines and the safety of our workers and the public. Numerous permits or other authorizations are required under these laws and regulations for the operation of our terminals, pipelines, saltwells, trucks and related operations, and may be subject to revocation, modification and renewal. See "Crude Oil Releases" below for discussion of an enforcement action. These laws and permits raise potential exposure to future claims and lawsuits involving environmental and safety matters, which could include soil and water contamination, air pollution, personal injury and property damage allegedly caused by substances which we handled, used, released or disposed of, transported, or that relate to pre-existing conditions for which we have assumed responsibility. We believe that our current operations are in substantial compliance with existing environmental and safety requirements. However, there have been and we expect that there will continue to be ongoing discussions about environmental and safety matters between us and federal and state authorities, including notices of violations, citations and other enforcement actions, some of which have resulted or may result in changes to operating procedures and in capital expenditures. While it is often difficult to quantify future environmental or safety related expenditures, we anticipate that continuing capital investments and changes in operating procedures will be required to comply with existing and new requirements, as well as evolving interpretations and more strict enforcement of existing laws and regulations. Releases of hydrocarbons or hazardous substances into the environment could, to the extent the event is not insured, or is not a reimbursable event under the Omnibus Agreement, subject us to substantial expenses, including costs to respond to, contain and remediate a release, to comply with applicable laws and regulations and to resolve claims by third parties for personal injury, property damage or natural resources damages. Crude Oil Releases We have experienced several crude oil releases involving our assets, including four releases that occurred in the first quarter of 2019, three releases that occurred in the first quarter of 2018, and three releases that occurred in the fourth quarter of 2018. Cleanup operations and site maintenance and remediation efforts on these and other releases are at various stages of completion. Regulatory authorities could require additional remediation based on the results of our remediation efforts. We may incur additional expenses as a result of further scrutiny by regulatory authorities and continued compliance with laws and regulations to which our assets are subject. As of March 31, 2019 , we have accrued $1.1 million for remediation and other such matters related to these releases, which excludes the Magnolia Release accrual discussed below. Expenses incurred for the remediation of these crude oil releases are included in operating expenses in our condensed consolidated statements of income and comprehensive income and the majority are subsequently reimbursed by Delek Holdings pursuant to the terms of the Omnibus Agreement. Reimbursements are recorded as a reduction to operating expense. We do not believe the total costs associated with these events, whether alone or in the aggregate, including any fines or penalties and net of available insurance reimbursement, will have a material adverse effect upon our business, financial condition or results of operations as we are reimbursed by Delek Holdings for such costs. During the three months ended March 31, 2019 and 2018 , we recorded approximately $0.1 million and a nominal amount of expense, respectively, which is net of total reimbursable costs from Delek Holdings pursuant to the terms of the Omnibus Agreement of $3.4 million and $2.9 million for the three months ended March 31, 2019 and 2018 , respectively, to cover the costs of asset failures. Many of the releases have occurred on our SALA Gathering System. Currently, we are in the process of decommissioning certain sections of the SALA Gathering System in an effort to improve the safety and integrity of the system. We do not expect for the decommissioning of certain gathering lines on the system to have a material effect on the operational capabilities of the system. The United States Department of Justice (the "DOJ"), on behalf of the EPA, and the state of Arkansas, on behalf of the Arkansas Department of Environmental Quality, have been pursuing an enforcement action against the Partnership with regard to potential violations of the Clean Water Act and certain state laws arising from the Magnolia Release since June 2015. On July 13, 2018, the DOJ and the State of Arkansas filed a civil action against two of the Partnership's wholly-owned subsidiaries, Delek Logistics Operations, LLC and SALA Gathering Systems LLC, in the United States District Court for the Western District of Arkansas. On December 12, 2018, the claims against the Partnership were resolved and an additional demand for a compliance audit at the Magnolia terminal was abandoned in exchange for payment of monetary penalties and other relief. As of March 31, 2019 , we accrued $2.2 million for the Magnolia Release. We believe this amount is adequate to cover our expected obligations related to these proceedings. The accrual is recorded in pipeline release liabilities in our condensed consolidated balance sheet. We expect to settle this accrual in the second half of 2019. Letters of Credit As of March 31, 2019 , we had no

Leases

Leases	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Leases	Leases We lease certain pipeline and transportation equipment. Leases with an initial term of 12 months or less are not recorded on the balance sheet; we recognize lease expense for these leases on a straight-line basis over the lease term. Our leases do not have any outstanding renewal options. Certain leases also include options to purchase the leased equipment. Certain of our lease agreements include rates based on equipment usage and others include rate inflationary indices based increases. Our lease agreements do not contain any material residual value guarantees or material restrictive covenants. Three months ended (in thousands) March 31, 2019 Lease Cost Operating lease cost $ 1,427 Short-term lease cost (1) 477 Total lease cost $ 1,904 Other Information Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ (1,427 ) Weighted-average remaining lease term (years) for operating leases 4.2 Weighted-average discount rate (2) operating leases 8.0 % (1) Includes an immaterial amount of variable lease cost. (2) Our discount rate is primarily based on our incremental borrowing rate in accordance with ASC 842. The following is an estimate of the maturity of our lease liabilities for operating leases having remaining noncancelable terms in excess of one year as of March 31, 2019 (in thousands) under ASC 842: April 1 to December 31, 2019 $ 4,328 2020 5,659 2021 5,337 2022 5,031 2023 2,429 Thereafter 8 Total lease payment 22,792 Less: Interest 3,606 Present value of lease liabilities $ 19,186 The following is an estimate of our future minimum lease payments for operating leases having remaining noncancelable terms in excess of one year as of December 31, 2018 (in thousands) under ASC 840: 2019 $ 5,755 2020 5,659 2021 5,337 2022 5,031 2023 2,429 Thereafter 8 Total future minimum lease payments $ 24,219

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Distribution Declaration On April 26, 2019 , our general partner's board of directors declared a quarterly cash distribution of $0.820 per unit, payable on May 14, 2019 , to unitholders of record on May 7, 2019

Organization and Basis of Pre_2

Organization and Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Accounting	Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles ("U.S. GAAP") have been condensed or omitted, although management believes that the disclosures herein are adequate to make the financial information presented not misleading. Our unaudited condensed consolidated financial statements have been prepared in conformity with U.S. GAAP applied on a consistent basis with those of the annual audited financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2018 (our "Annual Report on Form 10-K"), filed with the Securities and Exchange Commission (the "SEC") on March 1, 2019. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2018
Consolidation	All adjustments necessary for a fair presentation of the financial position and the results of operations for the interim periods presented have been included. All intercompany accounts and transactions have been eliminated. Such intercompany transactions do not include those with Delek Holdings' or our general partner, which are presented as related parties in these accompanying condensed consolidated financial statements. All adjustments are of a normal, recurring nature. Operating results for the interim period should not be viewed as representative of results that may be expected for any future interim period or for the full year.
New Accounting Pronouncements	New Accounting Pronouncements Adopted During Q1 2019 Accounting Standard Update ("ASU") 2017-12, Derivatives and Hedging - Targeted Improvements to Accounting for Hedging Activities In August 2017, the Financial Accounting Standards Board (the "FASB") issued guidance to better align financial reporting for hedging activities with the economic objectives of those activities for both financial (e.g., interest rate) and commodity risks. The guidance was intended to create more transparency in the presentation of financial results, both on the face of the financial statements and in the footnotes, and simplify the application of hedge accounting guidance. This guidance is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Companies are required to apply the guidance on a modified retrospective transition method in which the cumulative effect of the change is recognized within equity in the consolidated balance sheet as of the date of adoption. We adopted this guidance on the effective date and the adoption did not have a material impact on our business, financial condition and results of operations. ASU 2016-02, Leases In February 2016, the FASB issued guidance that requires the recognition of a lease liability and a right-of-use asset, initially measured at the present value of the lease payments, in the statement of financial condition for all leases with terms longer than one year. The guidance was subsequently amended to consider the impact of practical expedients and provide additional clarifications. The guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We adopted the new lease standard on January 1, 2019. We elected the package of practical expedients which, among other things, allows us to carry forward the historical lease classification. For certain lease classes, we have elected the practical expedient not to separate lease and non-lease components, which allows us to combine the components if certain criteria are met. Further, we elected the optional transition method, which allows us to recognize a cumulative-effect adjustment to the opening balance sheet of retained earnings at the date of adoption and to not recast our comparative periods. We have not elected the hindsight practical expedients, which would have allowed us to use hindsight in determining the reasonably certain lease term. The adoption of the lease accounting guidance had no impact on January 1, 2019 retained earnings and resulted in the recognition of a $20.2 million lease liability and a corresponding right-of-use asset on our consolidated balance sheet. The adoption did not have a material impact on our consolidated income statement. See Note 16 for further information. Accounting Pronouncements Not Yet Adopted ASU 2018-13, Fair Value Measurement - Changes to the Disclosure Requirements for Fair Value Measurement In August 2018, the FASB issued guidance related to disclosure requirements for fair value measurements. The pronouncement eliminates, modifies and adds disclosure requirements for fair value measurements. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2019, with early adoption permitted. We expect to adopt this guidance on or before the effective date and do not expect adopting this new guidance will have a material impact on our business, financial condition or results of operations. ASU 2016-13, Financial Instruments - Measurement of Credit Losses on Financial Instruments
Inventory	Inventory is stated at the lower of cost or net realizable value, with cost determined on a first-in, first-out basis.
Net Income Per Unit	We use the two-class method when calculating the net income per unit applicable to limited partners because we have more than one participating class of securities. Our participating securities consist of common units, general partner units and IDRs. The two-class method is based on the weighted-average number of common units outstanding during the period. Basic net income per unit applicable to limited partners is computed by dividing limited partners’ interest in net income, after deducting our general partner’s 2%
Segment Data	Our operating segments adhere to the accounting policies used for our consolidated financial statements. Our operating segments are managed separately because each segment requires different industry knowledge, technology and marketing strategies. Decisions concerning the allocation of resources and assessment of operating performance are made based on this segmentation. Management measures the operating performance of each of its reportable segments based on segment contribution margin. Segment contribution margin is defined as net revenues less cost of materials and other and operating expenses, excluding depreciation and amortization.
Property, Plant and Equipment, Impairment	In accordance with ASC 360, Property, Plant & Equipment
Fair Value Measurements	The fair values of financial instruments are estimated based upon current market conditions and quoted market prices for the same or similar instruments. Management estimates that the carrying value approximates fair value for all of our assets and liabilities that fall under the scope of ASC 825, Financial Instruments . We apply the provisions of ASC 820, Fair Value Measurements ("ASC 820"), which defines fair value, establishes a framework for its measurement and expands disclosures about fair value measurements. ASC 820 applies to commodity derivatives that are measured at fair value on a recurring basis. The standard also requires that we assess the impact of nonperformance risk on our derivatives. Nonperformance risk is not considered material to our financial statements at this time. ASC 820 requires disclosures that categorize assets and liabilities measured at fair value into one of three different levels depending on the observability of the inputs employed in the measurement. Level 1 inputs are quoted prices in active markets for identical assets or liabilities. Level 2 inputs are observable inputs other than quoted prices included within Level 1 for the asset or liability, either directly or indirectly through market-corroborated inputs. Level 3 inputs are unobservable inputs for the asset or liability reflecting our assumptions about pricing by market participants.

Related Party Transactions (Tab

Related Party Transactions (Tables)	3 Months Ended
	Mar. 31, 2019
Related Party Transactions [Abstract]
Summary of Related Party Transactions	A summary of revenue, purchases from affiliates and expense transactions with Delek Holdings and its affiliates are as follows (in thousands): Three Months Ended March 31, 2019 2018 Revenues $ 62,965 $ 61,644 Purchases from Affiliates $ 79,434 $ 83,401 Operating and maintenance expenses $ 9,925 $ 7,489 General and administrative expenses $ 1,370 $ 957

Revenues (Tables)

Revenues (Tables)	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following table represents a disaggregation of revenue for each reportable segment for the periods indicated (in thousands): Three Months Ended March 31, 2019 Pipelines and Transportation Wholesale Marketing and Terminalling Consolidated Service Revenue - Third Party $ 3,974 $ 120 $ 4,094 Product Revenue - Third Party — 85,424 85,424 Product Revenue - Affiliate — 9,386 9,386 Lease Revenue - Affiliate (1) 36,659 16,920 53,579 Total Revenue $ 40,633 $ 111,850 $ 152,483 (1) Net of $1.8 million of amortization expense for the three
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction	As of March 31, 2019 , we expect to recognize $1.1 billion in service and lease revenues related to our unfulfilled performance obligations pertaining to the minimum volume commitments and capacity utilization under the non-cancelable terms of our commercial agreements with Delek Holdings. Most of these agreements have an initial term ranging from five to ten years, which may be extended for various renewal terms. We disclose information about remaining performance obligations that have original expected durations of greater than one year. Our unfulfilled performance obligations as of March 31, 2019 were as follows (in thousands): Remainder of 2019 $ 126,236 2020 167,965 2021 167,714 2022 166,587 2023 and thereafter 474,200 Total expected revenue on remaining performance obligations $ 1,102,702

Net Income Per Unit (Tables)

Net Income Per Unit (Tables)	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Summary of Cash Distributions	Our distributions earned with respect to a given period are declared subsequent to quarter end. Therefore, the table below represents total cash distributions applicable to the period in which the distributions are earned. The expected date of distribution for the distributions earned during the period ended March 31, 2019 is May 14, 2019 . The calculation of net income per unit is as follows (dollars in thousands, except units and per unit amounts): Three Months Ended March 31, 2019 2018 Net income attributable to partners $ 19,696 $ 19,995 Less: General partner's distribution (including IDRs) (1) 7,424 5,710 Less: Limited partners' distribution 20,014 18,287 Distributions in excess of earnings $ (7,742 ) $ (4,002 ) General partner's earnings: Distributions (including IDRs) (1) $ 7,424 $ 5,710 Allocation of distributions in excess of earnings (154 ) (80 ) Total general partner's earnings $ 7,270 $ 5,630 Limited partners' earnings on common units: Distributions $ 20,014 $ 18,287 Allocation of distributions in excess of earnings (7,588 ) (3,922 ) Total limited partners' earnings on common units $ 12,426 $ 14,365 Weighted average limited partner units outstanding (2) : Common units - (basic) 24,407,168 24,382,633 Common units - (diluted) 24,416,058 24,393,746 Net income per limited partner unit (2) : Common units - (basic) $ 0.51 $ 0.59 Common units - (diluted) (3) $ 0.51 $ 0.59 (1) General partner distributions (including IDRs) consist of the 2.0% general partner interest and IDRs, which represent the right of the general partner to receive increasing percentages of quarterly distributions of available cash from operating surplus in excess of 0.43125 per unit per quarter. See Note 8 for further discussion related to IDRs. (2) We base our calculation of net income per unit on the weighted-average number of common limited partner units outstanding during the period. (3) There were no outstanding common units excluded from the diluted earnings per unit calculation for the three months ended March 31, 2019 and 2018

Equity (Tables)

Equity (Tables)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Schedule of Limited Partners' Capital Account by Class [Table Text Block]	The table below summarizes the changes in the number of units outstanding from December 31, 2018 through March 31, 2019 . Common - Public Common - Delek Holdings General Partner Total Balance at December 31, 2018 9,109,807 15,294,046 498,038 24,901,891 General partner units issued to maintain 2% interest — — 72 72 Unit-based compensation awards (1) 3,552 — — 3,552 Balance at March 31, 2019 9,113,359 15,294,046 498,110 24,905,515 (1) No
Summary of Allocation of General Partner's Interest in Net Income	The following table presents the allocation of the general partner's interest in net income (in thousands, except percentage of ownership interest): Three Months Ended March 31, 2019 2019 2018 Net income attributable to partners 19,696 $ 19,995 Less: General partner's IDRs (7,016 ) (5,337 ) Net income available to partners $ 12,680 $ 14,658 General partner's ownership interest 2.0 % 2.0 % General partner's allocated interest in net income 254 $ 293 General partner's IDRs 7,016 5,337 Total general partner's interest in net income $ 7,270 $ 5,630
Summary of Percentage Allocations of Available Cash From Operating Surplus	2.0% of all quarterly distributions that we make prior to our liquidation. Our general partner has the right, but not the obligation, to contribute up to a proportionate amount of capital to us to maintain its current general partner interest. The general partner's 2.0% interest in these distributions may be reduced if we issue additional units in the future and our general partner does not contribute a proportionate amount of capital to us to maintain its 2.0% general partner interest. Our general partner also currently holds IDRs that entitle it to receive increasing percentages, up to a maximum of 48.0% , of the cash we distribute from operating surplus (as defined in our Partnership Agreement) in excess of 0.43125 per unit per quarter. The maximum distribution is 48.0% and does not include any distributions that our general partner or its affiliates may receive on common or general partner units that it owns. The IDRs held by our general partner currently entitle it to receive the maximum distribution.
Summary of Distributions	The table below summarizes the quarterly distributions related to our quarterly financial results: Quarter Ended Total Quarterly Distribution Per Limited Partner Unit Total Quarterly Distribution Per Limited Partner Unit, Annualized Total Cash Distribution, including general partner interest and IDRs (in thousands) Date of Distribution Unitholders Record Date March 31, 2018 $ 0.750 $ 3.00 $ 23,997 May 15, 2018 May 7, 2018 June 30, 2018 $ 0.770 $ 3.08 $ 24,984 August 13, 2018 August 3, 2018 September 30, 2018 $ 0.790 $ 3.16 $ 25,960 November 9, 2018 November 2, 2018 December 31, 2018 $ 0.810 $ 3.24 $ 26,949 February 12, 2019 February 4, 2019 March 31, 2019 $ 0.820 $ 3.28 $ 27,438 May 14, 2019 (1) May 7, 2019 (1) Expected date of distribution. The allocations of total quarterly cash distributions made to general and limited partners for the three months ended March 31, 2019 and 2018 are set forth in the table below. Distributions earned with respect to a given period are declared subsequent to quarter end. Therefore, the table below presents total cash distributions applicable to the period in which the distributions are earned (in thousands, except per unit amounts): Three Months Ended March 31, 2019 2018 General partner's distributions: General partner's distributions $ 408 $ 373 General partner's IDRs 7,016 5,337 Total general partner's distributions 7,424 5,710 Limited partners' distributions: Common limited partners' distributions 20,014 18,287 Total cash distributions $ 27,438 $ 23,997 Cash distributions per limited partner unit $ 0.820 $ 0.750

Equity Method Investments (Tabl

Equity Method Investments (Tables)	3 Months Ended
	Mar. 31, 2019
Equity Method Investments and Joint Ventures [Abstract]
Summary of Financial Information for Equity Method Investees	Combined summarized financial information for 100% of our equity method investees is shown below (in thousands): March 31, 2019 December 31, 2018 Current assets $ 21,948 $ 15,450 Non-current assets $ 250,977 $ 240,852 Current liabilities $ 12,719 $ 4,362 Three Months Ended March 31, 2019 2018 Revenues $ 9,114 $ 7,990 Gross profit $ 4,894 $ 3,234 Net Income $ 4,417 $ 2,712

Segment Data (Tables)

Segment Data (Tables)	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Summary Segment Data	The following is a summary of business segment operating performance as measured by contribution margin for the periods indicated (in thousands): Three Months Ended March 31, 2019 2018 Pipelines and Transportation Net revenues: Affiliate $ 36,659 $ 29,462 Third party 3,974 4,251 Total pipelines and transportation 40,633 33,713 Cost of materials and other 5,567 4,441 Operating expenses (excluding depreciation and amortization) 10,834 9,622 Segment contribution margin $ 24,232 $ 19,650 Capital spending (1) 424 $ 1,408 Wholesale Marketing and Terminalling Net revenues: Affiliate (2) $ 26,306 $ 32,182 Third party 85,544 102,026 Total wholesale marketing and terminalling 111,850 134,208 Cost of materials and other 90,698 114,591 Operating expenses (excluding depreciation and amortization) 5,224 2,955 Segment contribution margin $ 15,928 $ 16,662 Capital spending (1) 480 $ 789 Consolidated Net revenues: Affiliate $ 62,965 $ 61,644 Third party 89,518 106,277 Total Consolidated 152,483 167,921 Cost of materials and other 96,265 119,032 Operating expenses (excluding depreciation and amortization presented below) 16,058 12,577 Contribution margin 40,160 36,312 General and administrative expenses 4,473 2,975 Depreciation and amortization 6,574 6,000 Loss (gain) on asset disposals 2 60 Operating income $ 29,111 $ 27,277 Capital spending (1) 904 $ 2,197 (1) Capital spending excludes transaction costs capitalized in the amount of $0.4 million that relate to the Big Spring Logistic Assets Acquisition for the three months ended March 31, 2018 . (2) Affiliate revenue for the wholesale marketing and terminalling segment is presented net of amortization expense pertaining to the Marketing Contract Intangible Acquisition. See Note 3 for additional information. The following table summarizes the total assets for each segment as of March 31, 2019 and December 31, 2018 (in thousands): March 31, 2019 December 31, 2018 Pipelines and transportation $ 401,833 $ 387,333 Wholesale marketing and terminalling 238,375 237,260 Total assets $ 640,208 $ 624,593 Property, plant and equipment and accumulated depreciation as of March 31, 2019 and depreciation expense by reporting segment for the three months ended March 31, 2019 were as follows (in thousands): Pipelines and Transportation Wholesale Marketing and Terminalling Consolidated Property, plant and equipment $ 359,213 $ 94,378 $ 453,591 Less: accumulated depreciation (112,170 ) (34,542 ) (146,712 ) Property, plant and equipment, net $ 247,043 $ 59,836 $ 306,879 Depreciation expense for the three months ended March 31, 2019 $ 5,241 $ 1,333 $ 6,574

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Summary of Fair Value Hierarchy for Financial Assets	The fair value hierarchy for our financial assets and liabilities accounted for at fair value on a recurring basis at March 31, 2019 and December 31, 2018 was as follows (in thousands): March 31, 2019 Level 1 Level 2 Level 3 Total Assets Commodity derivatives $ — $ 61 $ — $ 61 Total assets — 61 — 61 Liabilities Commodity derivatives — (87 ) — (87 ) Net liabilities $ — $ (26 ) $ — $ (26 ) December 31, 2018 Level 1 Level 2 Level 3 Total Assets Commodity derivatives $ — $ 186 $ — $ 186 Total assets — 186 — 186 Liabilities Commodity derivatives — (2 ) — (2 ) Net liabilities $ — $ 184 $ — $ 184

Derivative Instruments (Tables)

Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of the Fair Value of Derivative Instruments	The following table presents the fair value of our derivative instruments as of March 31, 2019 and December 31, 2018 . The fair value amounts below are presented on a gross basis and do not reflect the netting of asset and liability positions permitted under our master netting arrangements, including any cash deficit or collateral on deposit with our counterparties. We have elected to offset the recognized fair value amounts for multiple derivative instruments executed with the same counterparty in our financial statements. As a result, the asset and liability amounts below differ from the amounts presented in our accompanying condensed consolidated balance sheets. During the three months ended March 31, 2019 and 2018 , we did not elect hedge accounting treatment for these derivative positions. As a result, all changes in fair value are marked to market in the accompanying condensed consolidated statements of income and comprehensive income. See Note 12 for further information regarding the fair value of derivative instruments. (in thousands) March 31, 2019 December 31, 2018 Derivative Type Balance Sheet Location Assets Liabilities Assets Liabilities Derivatives: Commodity derivatives (1) Other current assets $ 61 $ (87 ) $ 186 $ (2 ) Total gross fair value of derivatives 61 (87 ) 186 (2 ) Less: Counterparty netting and cash deficit (collateral) (2) (183 ) (87 ) (404 ) (2 ) Total net fair value of derivatives $ 244 $ — $ 590 $ — (1) As of March 31, 2019 and December 31, 2018 , we had open derivative contracts representing 68,000 barrels and 82,000 barrels, respectively, of refined petroleum products. (2) As of March 31, 2019 and December 31, 2018 , we had a cash collateral of $0.3 million and $0.4 million
Summary of Recognized Gains (Losses) Associated with Derivatives	Recognized gains (losses) associated with our derivatives for the three months ended March 31, 2019 and 2018 were as follows (in thousands): Three Months Ended March 31, Derivative Type Income Statement Location 2019 2018 Commodity derivatives Cost of materials and other $ (1,014 ) $ 1,583

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Lease, Cost	Three months ended (in thousands) March 31, 2019 Lease Cost Operating lease cost $ 1,427 Short-term lease cost (1) 477 Total lease cost $ 1,904 Other Information Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ (1,427 ) Weighted-average remaining lease term (years) for operating leases 4.2 Weighted-average discount rate (2) operating leases 8.0 % (1) Includes an immaterial amount of variable lease cost. (2)
Lessee, Operating Lease, Liability, Maturity	The following is an estimate of the maturity of our lease liabilities for operating leases having remaining noncancelable terms in excess of one year as of March 31, 2019 (in thousands) under ASC 842: April 1 to December 31, 2019 $ 4,328 2020 5,659 2021 5,337 2022 5,031 2023 2,429 Thereafter 8 Total lease payment 22,792 Less: Interest 3,606 Present value of lease liabilities $ 19,186 The following is an estimate of our future minimum lease payments for operating leases having remaining noncancelable terms in excess of one year as of December 31, 2018 (in thousands) under ASC 840: 2019 $ 5,755 2020 5,659 2021 5,337 2022 5,031 2023 2,429 Thereafter 8 Total future minimum lease payments $ 24,219
Schedule of Future Minimum Rental Payments for Operating Leases	The following is an estimate of our future minimum lease payments for operating leases having remaining noncancelable terms in excess of one year as of December 31, 2018 (in thousands) under ASC 840: 2019 $ 5,755 2020 5,659 2021 5,337 2022 5,031 2023 2,429 Thereafter 8 Total future minimum lease payments $ 24,219

Organization and Basis of Pre_3

Organization and Basis of Presentation Organization and Basis of Presentation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Operating lease right-of-use assets	$ 19,186
Distributions from equity method investments	804	$ 660
Operating lease liability	$ 19,186		$ 20,200

Acquisitions - Narrative (Deta

Acquisitions - Narrative (Details) $ in Thousands	Mar. 01, 2018USD ($)storage_tankunderground_saltwell	Mar. 31, 2019USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2018USD ($)
Schedule of Asset Acquisitions, by Acquisition [Line Items]
Distributions to Delek Holdings for Big Spring Asset Acquisition			$ (98,798)
Property, plant and equipment		$ 306,879		$ 312,562
Marketing Contract Intangible, net		136,407		138,210
Total		640,208		$ 624,593
Big Spring Logistic Assets
Schedule of Asset Acquisitions, by Acquisition [Line Items]
Consideration transferred	$ 170,800
Number of storage tanks | storage_tank	75
Number of underground saltwells | underground_saltwell	4
Distributions to Delek Holdings for Big Spring Asset Acquisition		$ 98,800
Assets	$ 72,000
Asset retirement obligations	800
Business Acquisition, Transaction Costs	400
Marketing Contract Intangible, net	$ 144,200

Related Party Transactions - Co

Related Party Transactions - Commercial Agreements (Details) $ in Millions	Mar. 01, 2018USD ($)	Mar. 31, 2019$ / bbl
Big Spring Pipeline, Storage And Throughput Facilities Agreement | Crude Oil Throughput
Related Party Transaction [Line Items]
Term of agreement		10 years
Big Spring Pipeline, Storage And Throughput Facilities Agreement | Maximum | Crude Oil Throughput
Related Party Transaction [Line Items]
Throughput commitment tariff rate		0.66
Big Spring Pipeline, Storage And Throughput Facilities Agreement | Minimum | Crude Oil Throughput
Related Party Transaction [Line Items]
Throughput commitment tariff rate		0.05
Big Spring Asphalt Services Agreement
Related Party Transaction [Line Items]
Term of agreement		10 years
Big Spring Asphalt Services Agreement | Storage, Throughput Facilities
Related Party Transaction [Line Items]
Throughput commitment tariff rate		8.30
Big Spring Marketing Agreement
Related Party Transaction [Line Items]
Term of agreement		10 years
Big Spring Marketing Agreement | Maximum | Crude Oil Throughput
Related Party Transaction [Line Items]
Throughput commitment tariff rate		0.71
Big Spring Marketing Agreement | Minimum | Crude Oil Throughput
Related Party Transaction [Line Items]
Throughput commitment tariff rate		0.50
Omnibus Agreement | Delek US and affiliates
Related Party Transaction [Line Items]
Related party annual service fee | $	$ 3.9

Related Party Transactions - O

Related Party Transactions - Omnibus Agreement (Details) - USD ($) $ in Thousands	Feb. 12, 2019	Nov. 09, 2018	Aug. 13, 2018	May 15, 2018	Feb. 12, 2018	Feb. 28, 2019	Feb. 28, 2018	Mar. 31, 2019	Mar. 31, 2018
Related Party Transaction [Line Items]
Distribution Made to Limited Partner, Cash Distributions Paid	$ 26,949	$ 25,960	$ 24,984	$ 23,997	$ 22,800	$ 26,900
Reimbursement of capital expenditures by Delek Holdings								$ 812	$ 2,316
Accrual for environmental loss contingencies, period increase (decrease)								100
Delek US and affiliates
Related Party Transaction [Line Items]
Distribution Made to Limited Partner, Cash Distributions Paid						$ 19,600	$ 16,200
Delek US and affiliates | Operating and maintenance expense
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party								9,925	7,489
Omnibus Agreement | Delek US | Delek US and affiliates
Related Party Transaction [Line Items]
Reimbursement for costs incurred for asset failures								3,400	2,900
Omnibus Agreement | Delek US | Delek US and affiliates | Operating and maintenance expense
Related Party Transaction [Line Items]
Reimbursement for costs incurred for asset failures								3,500
Omnibus Agreement | Delek US | Delek US and affiliates | Other long term liabilities
Related Party Transaction [Line Items]
Reimbursement of capital expenditures by Delek Holdings								800	$ 2,300
DPG Management Agreement, Operating Service And Construction Fee Paid To Partnership | Delek US and affiliates
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party								1,900
Partnership Agreement | General Partner | Operating and maintenance expense
Related Party Transaction [Line Items]
Accounts Receivable, Related Parties								$ 1,500

Related Party Transactions - S

Related Party Transactions - Summary of Transactions (Details) - USD ($) $ in Thousands		Feb. 12, 2019	Nov. 09, 2018	Aug. 13, 2018	May 15, 2018	Feb. 12, 2018	Feb. 28, 2019	Feb. 28, 2018	Mar. 31, 2019	Mar. 31, 2018
Related Party Transaction [Line Items]
Distribution Made to Limited Partner, Cash Distributions Paid		$ 26,949	$ 25,960	$ 24,984	$ 23,997	$ 22,800	$ 26,900
Affiliates (1)	[1]								$ 62,965	$ 61,644
Delek US and affiliates
Related Party Transaction [Line Items]
Related Party Transaction, Other Revenues from Transactions with Related Party									62,965	61,644
Distribution Made to Limited Partner, Cash Distributions Paid							$ 19,600	$ 16,200
General and administrative expenses									1,370	957
Cost of goods sold | Delek US and affiliates
Related Party Transaction [Line Items]
Expenses									79,434	83,401
Operating and maintenance expense | Delek US and affiliates
Related Party Transaction [Line Items]
Expenses									9,925	7,489
Delek US | Omnibus Agreement | Delek US and affiliates
Related Party Transaction [Line Items]
Reimbursement for costs incurred for asset failures									3,400	$ 2,900
Delek US | Omnibus Agreement | Operating and maintenance expense | Delek US and affiliates
Related Party Transaction [Line Items]
Reimbursement for costs incurred for asset failures									$ 3,500
[1]	See Note 3

Related Party Transactions - Q

Related Party Transactions - Quarterly Cash Distributions (Details) - USD ($) $ in Thousands	May 14, 2019	Apr. 26, 2019	Feb. 12, 2019	Nov. 09, 2018	Aug. 13, 2018	May 15, 2018	Feb. 12, 2018	Feb. 28, 2019	Feb. 28, 2018	Mar. 31, 2019
Related Party Transaction [Line Items]
Accrual for environmental loss contingencies, period increase (decrease)										$ 100
Distribution Made to Limited Partner, Cash Distributions Paid			$ 26,949	$ 25,960	$ 24,984	$ 23,997	$ 22,800	$ 26,900
Subsequent Event
Related Party Transaction [Line Items]
Distribution Made to Limited Partner, Cash Distributions Paid	$ 27,438
Distribution Made to Limited Partner, Cash Distributions Declared		$ 27,400
Delek US and affiliates
Related Party Transaction [Line Items]
Distribution Made to Limited Partner, Cash Distributions Paid								$ 19,600	$ 16,200
Delek US and affiliates | Subsequent Event
Related Party Transaction [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared		$ 20,000

Revenues (Details)

Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Property, plant and equipment	$ 306,879		$ 312,562
Total revenue	152,483	$ 167,921
Amortization of customer contract intangible assets	1,803	601
Service Revenue - Third Party
Disaggregation of Revenue [Line Items]
Total revenue	4,094
Product Revenue - Third Party
Disaggregation of Revenue [Line Items]
Total revenue	85,424
Product Revenue - Affiliate
Disaggregation of Revenue [Line Items]
Total revenue	9,386
Lease Revenue - Affiliate
Disaggregation of Revenue [Line Items]
Total revenue	53,579
Pipelines and transportation
Disaggregation of Revenue [Line Items]
Property, plant and equipment	247,043
Total revenue	40,633	33,713
Pipelines and transportation | Service Revenue - Third Party
Disaggregation of Revenue [Line Items]
Total revenue	3,974
Pipelines and transportation | Product Revenue - Third Party
Disaggregation of Revenue [Line Items]
Total revenue	0
Pipelines and transportation | Product Revenue - Affiliate
Disaggregation of Revenue [Line Items]
Total revenue	0
Pipelines and transportation | Lease Revenue - Affiliate
Disaggregation of Revenue [Line Items]
Total revenue	36,659
Wholesale marketing and terminalling
Disaggregation of Revenue [Line Items]
Property, plant and equipment	59,836
Total revenue	111,850	$ 134,208
Wholesale marketing and terminalling | Service Revenue - Third Party
Disaggregation of Revenue [Line Items]
Total revenue	120
Wholesale marketing and terminalling | Product Revenue - Third Party
Disaggregation of Revenue [Line Items]
Total revenue	85,424
Wholesale marketing and terminalling | Product Revenue - Affiliate
Disaggregation of Revenue [Line Items]
Total revenue	9,386
Wholesale marketing and terminalling | Lease Revenue - Affiliate
Disaggregation of Revenue [Line Items]
Total revenue	16,920
Assets Held Under Finance Leases
Disaggregation of Revenue [Line Items]
Property, plant and equipment	$ 257,700

Revenues - Remaining Performanc

Revenues - Remaining Performance Obligation Expected Timing of Satisfaction - Period (Details) $ in Thousands	Mar. 31, 2019USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 126,236
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	167,965
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	167,714
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	166,587
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	474,200
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 1,102,702

Inventory (Details)

Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Inventory [Line Items]
Inventories	$ 6,669	$ 5,491

Long-Term Obligations - Second

Long-Term Obligations - Second Amended and Restated Credit Agreement (Details) - Line of Credit - Revolving Credit Facility - Fifth Third Bank - USD ($)	Dec. 30, 2014	Mar. 31, 2019	Dec. 31, 2018	Sep. 28, 2018	Sep. 27, 2018
Line of Credit Facility [Line Items]
Weighted average interest rate (as percent)		5.10%
Prime Rate | United States of America, Dollars
Line of Credit Facility [Line Items]
Variable rate description	U.S. dollar prime rate
London Interbank Offered Rate (LIBOR) | United States of America, Dollars
Line of Credit Facility [Line Items]
Variable rate description	LIBOR
Canadian prime rate | Canada, Dollars
Line of Credit Facility [Line Items]
Variable rate description	Canadian dollar prime rate
Canadian Dealer Offered Rate (CDOR) | Canada, Dollars
Line of Credit Facility [Line Items]
Variable rate description	Canadian Dealer Offered Rate
DKL Revolver
Line of Credit Facility [Line Items]
Maximum lender commitment				$ 850,000,000	$ 700,000,000
Maximum amount under accordion feature				$ 1,000,000,000
Second Amended and Restated Credit Agreement
Line of Credit Facility [Line Items]
Maximum lender commitment			$ 700,000,000
Commitment fee (as percent)		0.40%
Principal amount of Holdings Note		$ 102,000,000
Outstanding borrowings		461,200,000
Letters of credit outstanding		0
Unused credit commitment		$ 388,800,000

Long-Term Obligations - 6.75%

Long-Term Obligations - 6.75% Senior Notes Due 2025 (Details) - Senior Notes - Senior 2025 Notes - USD ($)	May 23, 2017	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Face amount of debt	$ 250,000,000
Interest rate (as percent)	6.75%
Purchase price (as percent)		101.00%
Long-term Line of Credit		$ 250,000,000
Deferred financing costs		4,600,000	$ 4,800,000
Debt discount		$ 1,400,000	$ 1,500,000
Anytime prior to May 15, 2020
Debt Instrument [Line Items]
Redemption price, percentage of principal amount redeemed (as percent)	35.00%
Redemption price (as percent)	106.75%
Twelve-month period beginning on May 15, 2020
Debt Instrument [Line Items]
Redemption price (as percent)	105.063%
Twelve-month period beginning on May 15, 2021
Debt Instrument [Line Items]
Redemption price (as percent)	103.375%
Twelve-month period beginning on May 15, 2022
Debt Instrument [Line Items]
Redemption price (as percent)	101.688%
Beginning on May 15, 2023 and thereafter
Debt Instrument [Line Items]
Redemption price (as percent)	100.00%

Net Income Per Unit - Narrativ

Net Income Per Unit - Narrative (Details)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
General partner's ownership interest (as percent)	2.00%	2.00%

Net Income Per Unit (Details)

Net Income Per Unit (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Net Income Per Unit [Line Items]
Net income attributable to partners		$ 19,696	$ 19,995
Less: Partners' distribution		20,014	18,287
Allocation of distributions in excess of earnings		$ (7,742)	$ (4,002)
Footnote [Abstract]
General partner's ownership interest (as percent)		2.00%	2.00%
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest, Excess Per Unit Of Cash Distribution		$ 0.43125
Common Units
Net Income Per Unit [Line Items]
Common units - (basic) (in shares)		24,407,168	24,382,633
Common units - (diluted) (in shares)		24,416,058	24,393,746
Common units - (basic) (in dollars per share)		$ 0.51	$ 0.59
Common units - (diluted) (in dollars per share)		$ 0.51	$ 0.59
General Partner
Net Income Per Unit [Line Items]
Net income attributable to partners		$ 7,270	$ 5,630
Less: General partner's distribution (including IDRs)	[1]	7,424	5,710
Allocation of distributions in excess of earnings		(154)	(80)
Total partner's earnings		7,270	5,630
Common unitholders | Common Units
Net Income Per Unit [Line Items]
Less: Partners' distribution		20,014	18,287
Allocation of distributions in excess of earnings		(7,588)	(3,922)
Total partner's earnings		$ 12,426	$ 14,365
Common units - (basic) (in shares)	[2]	24,407,168	24,382,633
Common units - (diluted) (in shares)	[2]	24,416,058	24,393,746
Common units - (basic) (in dollars per share)	[2]	$ 0.51	$ 0.59
Common units - (diluted) (in dollars per share)	[2],[3]	$ 0.51	$ 0.59
[1]	General partner distributions (including IDRs) consist of the 2.0% general partner interest and IDRs, which represent the right of the general partner to receive increasing percentages of quarterly distributions of available cash from operating surplus in excess of 0.43125 per unit per quarter. See Note 8
[2]	We base our calculation of net income per unit on the weighted-average number of common limited partner units outstanding during the period.
[3]	There were no outstanding common units excluded from the diluted earnings per unit calculation for the three months ended March 31, 2019 and 2018

Equity - Narrative (Details)

Equity - Narrative (Details) - shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Class of Stock [Line Items]
General partner's ownership interest (as percent)	2.00%	2.00%
Delek US
Class of Stock [Line Items]
Ownership Interest in General Partner (as percent)	94.60%
Affiliates
Class of Stock [Line Items]
Ownership Interest in General Partner (as percent)	5.40%
Limited Partner | Common unitholders - public
Class of Stock [Line Items]
Common units outstanding (in shares)	9,113,359		9,109,807
Limited Partner | Common unitholders - Delek
Class of Stock [Line Items]
Common units outstanding (in shares)	15,294,046		15,294,046
General Partner
Class of Stock [Line Items]
General partner units outstanding (units)	498,110		498,038
Delek US Holdings, Inc.
Class of Stock [Line Items]
Delek's limited partner ownership interest (as percent)	61.40%

Equity - Equity Activity (Deta

Equity - Equity Activity (Details) - shares		3 Months Ended
		Mar. 31, 2019	Dec. 31, 2018
General Partners' Capital Account, Units Issued		498,110	498,038
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at December 31, 2018		24,901,891
General partner units issued to maintain 2% interest		72
Unit-based compensation awards	[1]	3,552
Balance at March 31, 2019		24,905,515
Partners' Capital Account, Units Withheld for Taxes		0
Limited Partner | Common unitholders - public
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at December 31, 2018		9,109,807
General partner units issued to maintain 2% interest		0
Unit-based compensation awards	[1]	3,552
Balance at March 31, 2019		9,113,359
Limited Partner | Common unitholders - Delek
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at December 31, 2018		15,294,046
General partner units issued to maintain 2% interest		0
Unit-based compensation awards		0
Balance at March 31, 2019		15,294,046
General Partner
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at December 31, 2018		498,038
General partner units issued to maintain 2% interest		72
Unit-based compensation awards		0
Balance at March 31, 2019		498,110
[1]	No units were withheld for taxes during the three months ended March 31, 2019

Equity - Allocations of Net In

Equity - Allocations of Net Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Equity [Abstract]
Net income attributable to partners	$ 19,696	$ 19,995
Less: General partner's IDRs	(7,016)	(5,337)
Net income available to partners	$ 12,680	$ 14,658
General partner's ownership interest (as percent)	2.00%	2.00%
General partner's allocated interest in net income	$ 254	$ 293
General partner's IDRs	7,016	5,337
Total general partner's interest in net income	$ 7,270	$ 5,630

Equity - Incentive Distributio

Equity - Incentive Distribution Rights (Details) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Equity [Abstract]
General partner's ownership interest (as percent)	2.00%	2.00%
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest, Excess Per Unit Of Cash Distribution	$ 0.43125
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest, Increasing Percentage, Maximum	48.00%

Equity - Cash Distributions (D

Equity - Cash Distributions (Details) - USD ($) $ / shares in Units, $ in Thousands	May 14, 2019	Feb. 12, 2019	Nov. 09, 2018	Oct. 23, 2018	Aug. 13, 2018	May 15, 2018	Feb. 12, 2018	Feb. 28, 2019	Mar. 31, 2019	Mar. 31, 2018
Distribution Made to Limited Partner [Line Items]
Total Quarterly Distribution Per Limited Partner Unit - Paid (in dollars per share)		$ 0.810		$ 0.790	$ 0.770	$ 0.750
Total Quarterly Distribution Per Limited Partner Unit, Annualized - Paid (in dollars per share)		$ 3.24		$ 3.16	$ 3.08	$ 3
Total Cash Distribution, including general partner interest and IDRs		$ 26,949	$ 25,960		$ 24,984	$ 23,997	$ 22,800	$ 26,900
Total Quarterly Distribution Per Limited Partner Unit - Declared (in dollars per share)									$ 0.820	$ 0.750
Subsequent Event
Distribution Made to Limited Partner [Line Items]
Total Quarterly Distribution Per Limited Partner Unit - Paid (in dollars per share)	$ 0.820
Total Quarterly Distribution Per Limited Partner Unit, Annualized - Paid (in dollars per share)	$ 3.28
Total Cash Distribution, including general partner interest and IDRs	$ 27,438

Equity - Distributions Earned

Equity - Distributions Earned (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Distributions Earned by Limited or General Partners [Line Items]
General partner's IDRs	$ 7,016	$ 5,337
Total general partner's distributions	7,424	5,710
Common limited partners' distributions	20,014	18,287
Total cash distributions	$ 27,438	$ 23,997
Cash distributions per limited partner unit (in dollars per share)	$ 0.820	$ 0.750
General Partner
Distributions Earned by Limited or General Partners [Line Items]
General partner's distributions	$ 408	$ 373
General partner's IDRs	$ 7,016	$ 5,337

Equity Based Compensation (Det

Equity Based Compensation (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total unrecognized compensation costs	$ 0.1
Weighted average period of recognition (years)	2 months 12 days
General and administrative expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unit-based compensation expense	$ 0.1

Equity Method Investments (Det

Equity Method Investments (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)joint_venture	Mar. 31, 2018USD ($)	Dec. 31, 2018USD ($)
Schedule of Equity Method Investments [Line Items]
Equity method investments, number of joint ventures | joint_venture	2
Investment in joint ventures	$ 107,830		$ 104,770
CP LLC
Schedule of Equity Method Investments [Line Items]
Ownership interest (as percent)	50.00%
Rangeland Rio
Schedule of Equity Method Investments [Line Items]
Ownership interest (as percent)	33.00%
Joint Ventures
Schedule of Equity Method Investments [Line Items]
Current assets	$ 21,948		15,450
Non-current assets	250,977		240,852
Current liabilities	12,719		$ 4,362
Revenues	9,114	$ 7,990
Gross profit	4,894	3,234
Net income	$ 4,417	$ 2,712

Segment Data - Narrative (Detai

Segment Data - Narrative (Details)	3 Months Ended
	Mar. 31, 2019segment
Segment Reporting [Abstract]
Number of reportable segments	2

Segment Data (Details)

Segment Data (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019		Mar. 31, 2018	Dec. 31, 2018	Mar. 01, 2018
Segment Reporting Information [Line Items]
Affiliates (1)	[1]	$ 62,965		$ 61,644
Third party		89,518		106,277
Total revenue		152,483		167,921
Cost of materials and other		96,265		119,032
Operating expenses (excluding depreciation and amortization presented below)		16,058		12,577
Segment contribution margin		40,160		36,312
General and administrative expenses		4,473		2,975
Depreciation and amortization		6,574		6,000
Loss (gain) on asset disposals		2		60
Operating income		29,111		27,277
Capital spending	[2]	904		2,197
Total assets		640,208			$ 624,593
Pipelines and transportation
Segment Reporting Information [Line Items]
Affiliates (1)		36,659		29,462
Third party		3,974		4,251
Total revenue		40,633		33,713
Cost of materials and other		5,567		4,441
Operating expenses (excluding depreciation and amortization presented below)		10,834		9,622
Segment contribution margin		24,232		19,650
Capital spending		424	[2]	1,408
Total assets		401,833			387,333
Wholesale marketing and terminalling
Segment Reporting Information [Line Items]
Affiliates (1)	[3]	26,306		32,182
Third party		85,544		102,026
Total revenue		111,850		134,208
Cost of materials and other		90,698		114,591
Operating expenses (excluding depreciation and amortization presented below)		5,224		2,955
Segment contribution margin		15,928		16,662
Capital spending		480	[3]	$ 789
Total assets		$ 238,375			$ 237,260
Big Spring Logistic Assets
Segment Reporting Information [Line Items]
Business Acquisition, Transaction Costs						$ 400
[1]	See Note 3
[2]	Capital spending excludes transaction costs capitalized in the amount of $0.4 million that relate to the Big Spring Logistic Assets Acquisition for the three months ended March 31, 2018
[3]	Affiliate revenue for the wholesale marketing and terminalling segment is presented net of amortization expense pertaining to the Marketing Contract Intangible Acquisition. See Note 3

Segment Data - PP&E (Details)

Segment Data - PP&E (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Property, plant and equipment	$ 453,591	$ 452,746
Less: accumulated depreciation	(146,712)	(140,184)
Property, plant and equipment, net	306,879	$ 312,562
Depreciation expense	6,574
Pipelines and transportation
Segment Reporting Information [Line Items]
Property, plant and equipment	359,213
Less: accumulated depreciation	(112,170)
Property, plant and equipment, net	247,043
Depreciation expense	5,241
Wholesale marketing and terminalling
Segment Reporting Information [Line Items]
Property, plant and equipment	94,378
Less: accumulated depreciation	(34,542)
Property, plant and equipment, net	59,836
Depreciation expense	$ 1,333

Fair Value Measurements (Detai

Fair Value Measurements (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	$ 61	$ 186
Net assets (liabilities)	(26)	184
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	0	0
Net assets (liabilities)	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	61	186
Net assets (liabilities)	(26)	184
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	0	0
Net assets (liabilities)	0	0
Commodity derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	61	186
Derivative Liability	(87)	(2)
Commodity derivatives | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0	0
Derivative Liability	0	0
Commodity derivatives | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	61
Derivative Liability	(87)	(2)
Commodity derivatives | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0	0
Derivative Liability	$ 0	$ 0

Fair Value Measurements - Narr

Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Cash collateral	$ 0.3	$ 0.4

Derivative Instruments - Narra

Derivative Instruments - Narrative (Details)	3 Months Ended
	Mar. 31, 2019
Fuel [Member] | Forward Contracts [Member]
Derivative [Line Items]
Term of contract (less than 90 days for forward fuel contracts)	90 days

Derivative Instruments - Balan

Derivative Instruments - Balance Sheet Location (Details) $ in Thousands		Mar. 31, 2019USD ($)bbl	Dec. 31, 2018USD ($)bbl
Footnote [Abstract]
Cash collateral		$ 300	$ 400
Derivatives not designated as hedging instrument [Member]
Derivatives, Fair Value [Line Items]
Assets		61	186
Liabilities		(87)	(2)
Less: Counterparty netting and cash collateral (deficit), assets	[1]	(183)	(404)
Less: Counterparty netting and cash collateral (deficit), liabilities	[1]	(87)	(2)
Total net fair value of derivative, assets		244	590
Total net fair value of derivative, liabilities		$ 0	$ 0
Footnote [Abstract]
Derivative open contracts (in barrels) | bbl		68,000	82,000
Derivatives not designated as hedging instrument [Member] | Commodity derivatives | Other current assets
Derivatives, Fair Value [Line Items]
Assets	[2]	$ 61	$ 186
Liabilities	[2]	$ (87)	$ (2)
[1]	As of March 31, 2019 and December 31, 2018 , we had a cash collateral of $0.3 million and $0.4 million
[2]	As of March 31, 2019 and December 31, 2018 , we had open derivative contracts representing 68,000 barrels and 82,000

Derivative Instruments - Incom

Derivative Instruments - Income Statement Location (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Commodity derivatives [Member] | Cost of goods sold | Derivatives not designated as hedging instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Recognized gain (loss)	$ (1,014)	$ 1,583

Commitments and Contingencies

Commitments and Contingencies - Crude Oil Releases (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies, period increase (decrease)	$ 0.1
Magnolia Release | Other Current Liabilities [Member] | Magnolia Release
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	2.2
Operating Expense [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	1.1
Delek US | Omnibus Agreement | Delek US and affiliates
Loss Contingencies [Line Items]
Reimbursement for costs incurred for asset failures	3.4	$ 2.9
Delek US | Omnibus Agreement | Operating Expense [Member] | Delek US and affiliates
Loss Contingencies [Line Items]
Reimbursement for costs incurred for asset failures	$ 3.5

Commitments and Contingencies_2

Commitments and Contingencies - Letters of Credit (Details)	Mar. 31, 2019USD ($)
Second Amended and Restated Credit Agreement | Line of Credit | Revolving Credit Facility | Fifth Third Bank
Debt Instrument [Line Items]
Letters of credit outstanding	$ 0

Leases - Lease Payments, Maturi

Leases - Lease Payments, Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019
Operating Leases, After Adoption of 842:
April 1 to December 31, 2019	$ 4,328
2020	5,659
2021	5,337
2022	5,031
2023	2,429
Thereafter	8
Total lease payment	22,792
Less: Interest	3,606
Present value of lease liabilities	19,186	$ 20,200
Operating Leases, Before Adoption of 842:
2019	5,755
2020	5,659
2021	5,337
2022	5,031
2023	2,429
Thereafter	8
Total future minimum lease payments	$ 24,219

Leases - Lease Cost and Other I

Leases - Lease Cost and Other Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Leases [Abstract]
Operating lease cost	$ 1,427
Short-term lease cost	477	[1]
Total lease cost	1,904
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ (1,427)
Weighted-average remaining lease term (years) for operating leases	4 years 2 months 12 days
Weighted-average discount rate (2) operating leases	8.00%	[2]
[1]	Includes an immaterial amount of variable lease cost.
[2]	Our discount rate is primarily based on our incremental borrowing rate in accordance with ASC 842.

Subsequent Events - Distributi

Subsequent Events - Distribution Declaration (Details) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Subsequent Event [Line Items]
Cash distributions per limited partner unit (in dollars per share)	$ 0.820	$ 0.750