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Commitments and Contingencies | 12 Months Ended
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Dec. 31, 2018
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. 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, but not limited to, the following releases:
• | On December 25, 2018 a release of an undetermined quantity of crude oil occurred on one of our gathering lines near Norphlet, Arkansas (the "Norphlet Release");
• | On December 13, 2018 a release of an undetermined quantity of crude oil occurred on one of our gathering lines near Smackover, Arkansas (the "Smackover-Langley Release");
• | In November 2018, a release of approximately 20 barrels of crude oil occurred near Smackover, Arkansas;
• | On March 15, 2018 a release of approximately 10 barrels of crude oil occurred on one of our gathering lines located on property owned by Clean Harbors, Inc. in El Dorado, Arkansas;
• | In February 2018, a release of approximately 50 barrels of crude oil occurred from a line near one of our storage facilities located south of El Dorado, Arkansas;
• | In February 2018, a release of approximately 250 barrels of crude oil, occurred from our SALA Gathering System near Urbana, Arkansas Station; and
• | In March 2013, a release of approximately 5,900 barrels of crude oil, the majority of which was contained on-site, occurred from a pumping facility at our Magnolia Station located west of the El Dorado Refinery (the "Magnolia Release").
Cleanup operations and site maintenance and remediation efforts on these and other releases have been substantially completed, with the exception of the Smackover-Langley Release and the Norphlet Release, which are expected to be remediated in the third and first quarters of 2019, respectively. However, 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 December 31, 2018, we have accrued $1.5 million and $0.5 million for the Smackover-Langley Release and the Norphlet Release, respectively, for remediation and other such matters. Expenses incurred for the remediation of these crude oil releases are included in operating expenses in our consolidated statements of income and comprehensive income and 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 year ended December 31, 2018, we recorded approximately $0.4 million of expense, which is net of total reimbursable costs from Delek Holdings pursuant to the terms of the Omnibus Agreement of $9.8 million for the year ended December 31, 2018 to cover the cost of certain asset failures that occurred in 2018. 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 pursuant to payment of monetary penalties and other relief. As of December 31, 2018, we have accrued $2.2 million for the Magnolia Release, which represents the full settlement amount for these proceedings. The accrual is recorded in pipeline release liabilities in our consolidated balance sheet. Contracts and Agreements The majority of the petroleum products we sold in west Texas prior to December 31, 2017 were purchased from Noble Petro, Inc. ("Noble Petro"). Under the terms of a supply contract with Noble Petro that expired on December 31, 2017, we purchased petroleum products at the Abilene, Texas terminal, which we own, for sales and exchanges with third parties at the Abilene, Texas and San Angelo, Texas terminals. We leased the Abilene and San Angelo, Texas terminals to Noble Petro under a separate Terminal and Pipeline Lease and Operating Agreement, that expired on December 31, 2017. During 2018, we purchased spot barrels from various third parties and from Delek Holdings for sale to wholesale customers in west Texas. Letters of Credit As of December 31, 2018, we had no letters of credit in place under the DKL Credit Facility. Operating Leases We lease certain equipment and have surface leases under various operating lease arrangements, most of which provide the option, after the initial lease term, to renew the leases. None of these lease arrangements include fixed rental rate increases. Lease expense for all operating leases for the years ended December 31, 2018, 2017 and 2016 totaled $6.2 million, $5.6 million and $5.7 million, respectively. 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):
2019 |  | $ | 5,755 |
2020 |  | 5,659 |
2021 |  | 5,337 |
2022 |  | 5,031 |
2023 |  | 2,429 |
Thereafter |  | 8 |
Total future minimum rentals |  | $ | 24,219 |

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