ORGANIZATION AND BASIS OF PRESENTATION	9 Months Ended
Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION AND BASIS OF PRESENTATION	ORGANIZATION AND BASIS OF PRESENTATION Organization and Operations NuStar Energy L.P. (NYSE: NS) is a Delaware limited partnership primarily engaged in the transportation, terminalling and storage of petroleum products and renewable fuels and the transportation of anhydrous ammonia. Unless otherwise indicated, the terms “NuStar Energy,” “NS,” “the Partnership,” “we,” “our” and “us” are used in this report to refer to NuStar Energy L.P., to one or more of our consolidated subsidiaries or to all of them taken as a whole. Our business is managed under the direction of the board of directors of NuStar GP, LLC, the general partner of our general partner, Riverwalk Logistics, L.P., both of which are indirectly wholly owned subsidiaries of ours. We conduct our operations through our subsidiaries, primarily NuStar Logistics, L.P. (NuStar Logistics) and NuStar Pipeline Operating Partnership L.P. (NuPOP). We have three business segments: pipeline, storage and fuels marketing. Recent Developments Eastern U.S. Terminals Disposition. On October 8, 2021, we completed the sale of nine U.S. terminal and storage facilities, including all our North East Terminals and one terminal in Florida (the Eastern U.S. Terminal Operations) to Sunoco LP for $250.0 million in cash (the Eastern U.S. Terminals Disposition). During the third quarter of 2021, we determined the Eastern U.S. Terminal Operations met the criteria to be classified as held for sale. Accordingly, the consolidated balance sheet reflects the assets and liabilities associated with the Eastern U.S. Terminal Operations as held for sale as of September 30, 2021. We recorded asset and goodwill impairment losses of $95.7 million and $34.1 million, respectively, in the third quarter of 2021. Please see Note 3 for further discussion. Houston Pipeline Impairment. In the third quarter of 2021, we recorded a long-lived asset impairment charge of $59.2 million related to the southern section of our Houston refined product pipeline. Please see Note 3 for further discussion. Selby Terminal Fire. On October 15, 2019, our terminal facility in Selby, California experienced a fire that destroyed two storage tanks and temporarily shut down the terminal. We received insurance proceeds of $28.5 million and $35.0 million for the nine months ended September 30, 2021 and 2020, respectively. Gains from business interruption insurance of $4.0 million and $6.7 million for the nine months ended September 30, 2021 and 2020, respectively, are included in “Operating expenses” in the condensed consolidated statements of comprehensive loss. For the third quarter of 2021, we recorded a gain of $9.4 million for the amount by which the insurance proceeds exceeded our expenses incurred to date, which is included in “Other income (expense), net” in the condensed consolidated statements of comprehensive loss. Insurance proceeds related to cleanup costs and business interruption are included in “Cash flows from operating activities” in the consolidated statements of cash flows. We believe we have adequate insurance to offset additional costs. Basis of Presentation These unaudited condensed consolidated financial statements include the accounts of the Partnership and subsidiaries in which the Partnership has a controlling interest. Inter-partnership balances and transactions have been eliminated in consolidation. These unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) for interim financial information and with the instructions to the Quarterly Report on Form 10-Q and Article 10 of Regulation S-X of the Securities Exchange Act of 1934. Accordingly, they do not include all of the information and notes required by GAAP for complete consolidated financial statements. In the opinion of management, all adjustments considered necessary for a fair presentation have been included, and all disclosures are adequate. All such adjustments are of a normal recurring nature unless disclosed otherwise. Operating results for the nine months ended September 30, 2021 are not necessarily indicative of the results that may be expected for the year ending December 31, 2021. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2020. We have reclassified certain previously reported amounts in the consolidated financial statements and notes to conform to current-period presentation.

NuStar Energy L.P. (NYSE: NS) is a Delaware limited partnership primarily engaged in the transportation, terminalling and storage of petroleum products and renewable fuels and the transportation of anhydrous ammonia. Unless otherwise indicated, the terms “NuStar Energy,” “NS,” “the Partnership,” “we,” “our” and “us” are used in this report to refer to NuStar Energy L.P., to one or more of our consolidated subsidiaries or to all of them taken as a whole. Our business is managed under the direction of the board of directors of NuStar GP, LLC, the general partner of our general partner, Riverwalk Logistics, L.P., both of which are indirectly wholly owned subsidiaries of ours.

We conduct our operations through our subsidiaries, primarily NuStar Logistics, L.P. (NuStar Logistics) and NuStar Pipeline Operating Partnership L.P. (NuPOP). We have three business segments: pipeline, storage and fuels marketing.

Eastern U.S. Terminals Disposition. On October 8, 2021, we completed the sale of nine U.S. terminal and storage facilities, including all our North East Terminals and one terminal in Florida (the Eastern U.S. Terminal Operations) to Sunoco LP for $250.0 million in cash (the Eastern U.S. Terminals Disposition). During the third quarter of 2021, we determined the Eastern U.S. Terminal Operations met the criteria to be classified as held for sale. Accordingly, the consolidated balance sheet reflects the assets and liabilities associated with the Eastern U.S. Terminal Operations as held for sale as of September 30, 2021. We recorded asset and goodwill impairment losses of $95.7 million and $34.1 million, respectively, in the third quarter of 2021. Please see Note 3 for further discussion.

Houston Pipeline Impairment. In the third quarter of 2021, we recorded a long-lived asset impairment charge of $59.2 million related to the southern section of our Houston refined product pipeline. Please see Note 3 for further discussion.

Selby Terminal Fire. On October 15, 2019, our terminal facility in Selby, California experienced a fire that destroyed two storage tanks and temporarily shut down the terminal. We received insurance proceeds of $28.5 million and $35.0 million for the nine months ended September 30, 2021 and 2020, respectively. Gains from business interruption insurance of $4.0 million and $6.7 million for the nine months ended September 30, 2021 and 2020, respectively, are included in “Operating expenses” in the condensed consolidated statements of comprehensive loss. For the third quarter of 2021, we recorded a gain of $9.4 million for the amount by which the insurance proceeds exceeded our expenses incurred to date, which is included in “Other income (expense), net” in the condensed consolidated statements of comprehensive loss. Insurance proceeds related to cleanup costs and business interruption are included in “Cash flows from operating activities” in the consolidated statements of cash flows. We believe we have adequate insurance to offset additional costs.

These unaudited condensed consolidated financial statements include the accounts of the Partnership and subsidiaries in which the Partnership has a controlling interest. Inter-partnership balances and transactions have been eliminated in consolidation.

These unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) for interim financial information and with the instructions to the Quarterly Report on Form 10-Q and Article 10 of Regulation S-X of the Securities Exchange Act of 1934. Accordingly, they do not include all of the information and notes required by GAAP for complete consolidated financial statements. In the opinion of management, all adjustments considered necessary for a fair presentation have been included, and all disclosures are adequate. All such adjustments are of a normal recurring nature unless disclosed otherwise. Operating results for the nine months ended September 30, 2021 are not necessarily indicative of the results that may be expected for the year ending December 31, 2021. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2020.