General | 1. General Description of Business SunCoke Energy Partners, L.P., (the "Partnership", "we", "our", and "us") primarily produces coke used in the blast furnace production of steel. Coke is a principal raw material in the blast furnace steelmaking process and is produced by heating metallurgical coal in a refractory oven, which releases certain volatile components from the coal, thus transforming the coal into coke. We also provide handling and/or mixing services of coal and other bulk products and liquids at our logistics terminals. At March 31, 2019 , we owned a 98 percent interest in Haverhill Coke Company LLC ("Haverhill"), Middletown Coke Company, LLC ("Middletown") and Gateway Energy and Coke Company, LLC ("Granite City") and SunCoke Energy, Inc. ("SunCoke") owned the remaining 2 percent ownership interest in each of Haverhill, Middletown, and Granite City. The Partnership also owns a 100 percent interest in all of its logistics terminals, which consist of Convent Marine Terminal ("CMT"), Kanawha River Terminals, LLC ("KRT") and SunCoke Lake Terminal, LLC ("Lake Terminal"). At March 31, 2019 , SunCoke, through a subsidiary, owned a 60.4 percent limited partnership interest in us and indirectly owned and controlled our general partner, which holds a 2.0 percent general partner interest in us and all of our incentive distribution rights ("IDRs"). Our cokemaking ovens have collective capacity to produce 2.3 million tons of coke annually and utilize efficient, modern heat recovery technology designed to combust the coal’s volatile components liberated during the cokemaking process and use the resulting heat to create steam or electricity for sale. This differs from by-product cokemaking, which seeks to repurpose the coal’s liberated volatile components for other uses. We have constructed the only greenfield cokemaking facilities in the United States ("U.S.") in approximately 30 years and are the only North American coke producer that utilizes heat recovery technology in the cokemaking process. We provide steam pursuant to steam supply and purchase agreements with our customers. Electricity is sold into the regional power market or pursuant to energy sales agreements. Our logistics business provides handling and/or mixing services to steel, coke (including some of our and SunCoke's domestic cokemaking facilities), electric utility, coal producing and other manufacturing based customers. The logistics business has terminals with the collective capacity to mix and/or transload more than 40 million tons of coal annually and has total storage capacity of approximately 3 million tons. On February 5, 2019, SunCoke and the Partnership announced that they have entered into a definitive agreement whereby SunCoke will acquire all outstanding common units of the Partnership not already owned by SunCoke in a stock-for-unit merger transaction (the “Simplification Transaction”). Pursuant to the terms of this agreement (“Merger Agreement”), Partnership unaffiliated common unitholders will receive 1.40 SunCoke common shares, plus a fraction of a SunCoke common share based on a formula as further described in the Merger Agreement, for each Partnership common unit. Following completion of the Simplification Transaction, the Partnership will become a wholly-owned subsidiary of SunCoke, the Partnership's common units will cease to be publicly traded and the Partnership's IDRs will be eliminated. We continue to expect the Simplification Transaction to close late in the second quarter of 2019 or early in the third quarter of 2019. Organized in Delaware in 2012 and headquartered in Lisle, Illinois, we became a publicly-traded partnership in 2013 and our common units are listed on the New York Stock Exchange (“NYSE”) under the symbol “SXCP.” Basis of Presentation The accompanying unaudited consolidated financial statements included herein have been prepared in conformity with accounting principles generally accepted in the U.S. ("GAAP") for interim reporting. Certain information and disclosures normally included in financial statements have been omitted pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). In management’s opinion, the financial statements reflect all adjustments, which are of a normal recurring nature, necessary for a fair presentation of the results of operations, financial position and cash flows for the periods presented. The results of operations for the periods ended March 31, 2019 are not necessarily indicative of the operating results for the full year. These unaudited interim consolidated financial statements and notes should be read in conjunction with the audited consolidated financial statements and notes included in our Annual Report on Form 10-K for the year ended December 31, 2018 . Recently Adopted Accounting Pronouncements In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02, "Leases (Topic 842)." ASU 2016-02 requires leases to be recognized as assets and liabilities on the balance sheet for the rights and obligations created by all leases with terms of more than 12 months. Subsequently, the FASB has issued various ASUs to provide further clarification around certain aspects of Accounting Standards Codification (“ASC”) 842, "Leases." The Partnership adopted the standard effective January 1, 2019 using the modified retrospective transition approach and elected not to adjust prior comparative periods. Upon adoption, the Partnership recognized right-of-use assets and lease liabilities of $2.5 million at January 1, 2019. See Note 9 . |