0001110805-22-000029 | 10-Q | XBRL Viewer

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DEI Document - shares	3 Months Ended
DEI Document - shares	Mar. 31, 2022	Apr. 30, 2022
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	1-16417
Entity Registrant Name	NuStar Energy L.P.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	74-2956831
Entity Address, Street	19003 IH-10 West
Entity Address, City	San Antonio
Entity Address, State	TX
Entity Address, Zip Code	78257
City Area Code	210
Entity Local Phone Number	918-2000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Partnership Units Outstanding		110,303,252
Entity Central Index Key	0001110805
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Amendment Flag	false
Common Limited Partner [Member]
Document Information [Line Items]
Title of 12(b) Security	Common units
Trading Symbol	NS
Security Exchange Name	NYSE
Series A Preferred Limited Partner [Member]
Document Information [Line Items]
Title of 12(b) Security	Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units
Trading Symbol	NSprA
Security Exchange Name	NYSE
Series B Preferred Limited Partner [Member]
Document Information [Line Items]
Title of 12(b) Security	Series B Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units
Trading Symbol	NSprB
Security Exchange Name	NYSE
Series C Preferred Limited Partner [Member]
Document Information [Line Items]
Title of 12(b) Security	Series C Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units
Trading Symbol	NSprC
Security Exchange Name	NYSE

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 8,398	$ 5,637
Accounts receivable, net	142,527	135,126
Inventories	19,310	16,644
Prepaid and other current assets	15,079	27,135
Assets held for sale	86,458	0
Total current assets	271,772	184,542
Property, plant and equipment, at cost	5,625,080	5,728,848
Accumulated depreciation and amortization	(2,171,692)	(2,187,206)
Property, plant and equipment, net	3,453,388	3,541,642
Intangible assets, net	546,679	557,785
Goodwill	732,356	732,356
Other long-term assets, net	125,730	140,007
Total assets	5,129,925	5,156,332
Current liabilities:
Accounts payable	70,360	82,446
Current portion of finance lease obligations	4,000	3,848
Accrued interest payable	72,107	34,139
Accrued liabilities	54,447	79,818
Taxes other than income tax	10,196	14,475
Liabilities held for sale	66,496	0
Total current liabilities	277,606	214,726
Long-term debt, less current portion	3,168,425	3,183,555
Deferred income tax liability	2,848	11,831
Other long-term liabilities	137,763	147,956
Total liabilities	3,586,642	3,558,068
Commitments and contingencies (Note 6)
Series D preferred limited partners (23,246,650 preferred units outstanding as of March 31, 2022 and December 31, 2021) (Note 8)	621,018	616,439
Partners’ equity (Note 9):
Common limited partners (110,297,849 and 109,986,273 common units outstanding as of March 31, 2022 and December 31, 2021, respectively)	239,010	299,502
Accumulated other comprehensive loss	(73,046)	(73,978)
Total partners’ equity	922,265	981,825
Total liabilities, mezzanine equity and partners’ equity	5,129,925	5,156,332
Series A Preferred Limited Partner [Member]
Partners’ equity (Note 9):
Preferred limited partners	218,307	218,307
Series B Preferred Limited Partner [Member]
Partners’ equity (Note 9):
Preferred limited partners	371,476	371,476
Series C Preferred Limited Partner [Member]
Partners’ equity (Note 9):
Preferred limited partners	$ 166,518	$ 166,518

CONSOLIDATED BALANCE SHEETS (parenthetical) - shares	Mar. 31, 2022	Dec. 31, 2021
Series D preferred units outstanding	23,246,650	23,246,650
Limited partners common units outstanding	110,297,849	109,986,273
Series A Preferred Limited Partner [Member]
Preferred units outstanding	9,060,000	9,060,000
Series B Preferred Limited Partner [Member]
Preferred units outstanding	15,400,000	15,400,000
Series C Preferred Limited Partner [Member]
Preferred units outstanding	6,900,000	6,900,000

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Impairment loss	$ 46,122	$ 0
General and administrative expenses (excluding depreciation and amortization expense)	27,071	24,492
Other depreciation and amortization expense	1,824	2,047
Total costs and expenses	351,437	263,357
Operating income	58,426	98,289
Income before income tax (benefit) expense	12,279	43,769
Net income	12,312	42,257
Costs and expenses:
Interest expense, net	(49,818)	(54,918)
Other income, net	3,671	398
Income tax (benefit) expense	$ (33)	$ 1,512
Basic net income (loss) per common unit (Note 10)	$ (0.22)	$ 0.05
Diluted net income (loss) per common unit (Note 10)	$ (0.22)	$ 0.05
Basic weighted-average common units outstanding	110,177,045	109,506,222
Diluted weighted-average common units outstanding	110,177,045	109,506,222
Comprehensive income	$ 13,244	$ 44,377
Service [Member]
Revenues:
Total revenues	265,305	271,883
Costs and expenses:
Operating expenses (excluding depreciation and amortization expense)	86,402	87,287
Depreciation and amortization expense	63,303	68,418
Total costs associated with service revenues/Costs associated with product sales	149,705	155,705
Product [Member]
Revenues:
Total revenues	144,558	89,763
Costs and expenses:
Total costs associated with service revenues/Costs associated with product sales	126,715	81,113
Product and Service [Member]
Revenues:
Total revenues	$ 409,863	$ 361,646

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash Flows from Operating Activities:
Net income (loss)	$ 12,312	$ 42,257
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	65,127	70,465
Amortization of unit-based compensation	3,412	3,871
Amortization of debt related items	2,532	3,042
Impairment loss	46,122	0
Changes in current assets and current liabilities (Note 11)	17,512	24,397
Decrease in other long-term assets	3,644	2,381
Decrease in other long-term liabilities	(662)	(1,678)
Other, net	(4,169)	922
Net cash provided by operating activities	145,830	145,657
Cash flows from investing activities:
Capital expenditures	(32,750)	(40,463)
Change in accounts payable related to capital expenditures	(14,498)	(5,449)
Proceeds from insurance recoveries	5,805	0
Proceeds from sale or disposition of assets	341	130
Net cash used in investing activities	(41,102)	(45,782)
Cash flows from financing activities:
Proceeds from long-term debt borrowings	253,000	270,400
Long-term debt repayments	(268,800)	(418,100)
Distributions to preferred unitholders	(31,025)	(31,887)
Distributions to common unitholders	(44,041)	(43,811)
Other, net	(8,848)	(2,331)
Net cash used in financing activities	(99,714)	(225,729)
Effect of foreign exchange rate changes on cash	176	475
Net increase (decrease) in cash, cash equivalents and restricted cash	5,190	(125,379)
Cash, cash equivalents and restricted cash as of the beginning of the period	14,439	162,426
Cash, cash equivalents and restricted cash as of the end of the period	$ 19,629	$ 37,047

CONSOLIDATED STATEMENTS OF PARTNERS' EQUITY AND MEZZANINE EQUITY - USD ($) $ in Thousands	Total	AOCI [Member]	Preferred Limited Partner [Member]	Common Limited Partner [Member]	Series D Preferred Limited Partner [Member]
Partners' capital - beginning balance at Dec. 31, 2020	$ 1,231,959	$ (96,656)	$ 756,301	$ 572,314
Temporary equity - beginning balance at Dec. 31, 2020	599,542
Partners' capital and temporary equity - beginning balance at Dec. 31, 2020	1,831,501
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	42,257	0	16,033	10,370
Net income (loss) excluding portion attributable to temporary equity	26,403
Net income, temporary equity					$ 15,854
Other comprehensive income (loss)	2,120	2,120	0	0
Cash distributions to partners			(16,033)	(43,811)
Cash distributions to partners, temporary equity					(15,854)
Unit-based compensation	2,678	0	0	2,678
Series D Preferred Unit accretion, common	(4,021)			(4,021)
Series D Preferred Unit accretion, preferred					4,021
Series D Preferred Unit accretion, total	0
Other	7	0	0	7
Other, temporary equity					0
Other, including temporary equity	7
Partners' capital - ending balance at Mar. 31, 2021	1,199,302	(94,536)	756,301	537,537
Temporary equity - ending balance at Mar. 31, 2021	603,563
Partners' capital and temporary equity - ending balance at Mar. 31, 2021	1,802,865
Partners' capital - beginning balance at Dec. 31, 2021	981,825	(73,978)	756,301	299,502
Temporary equity - beginning balance at Dec. 31, 2021	616,439
Partners' capital and temporary equity - beginning balance at Dec. 31, 2021	1,598,264
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	12,312	0	15,238	(18,780)
Net income (loss) excluding portion attributable to temporary equity	(3,542)
Net income, temporary equity					15,854
Other comprehensive income (loss)	932	932	0	0
Cash distributions to partners			(15,238)	(44,041)
Cash distributions to partners, temporary equity					(15,854)
Unit-based compensation	6,910	0	0	6,910
Series D Preferred Unit accretion, common	(4,581)			(4,581)
Series D Preferred Unit accretion, preferred					4,581
Series D Preferred Unit accretion, total	0
Other	0	0	0	0
Other, temporary equity					$ (2)
Other, including temporary equity	(2)
Partners' capital - ending balance at Mar. 31, 2022	922,265	$ (73,046)	$ 756,301	$ 239,010
Temporary equity - ending balance at Mar. 31, 2022	621,018
Partners' capital and temporary equity - ending balance at Mar. 31, 2022	$ 1,543,283

CONSOLIDATED STATEMENTS OF PARTNERS' EQUITY AND MEZZANINE EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Common Limited Partner [Member]
Cash distributions paid, per unit	$ 0.40	$ 0.40

ORGANIZATION AND BASIS OF PRESENTATION	3 Months Ended
ORGANIZATION AND BASIS OF PRESENTATION	Mar. 31, 2022
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 Sale of Point Tupper Terminal. On April 29, 2022, we sold the equity interests in our wholly owned subsidiaries that own our Point Tupper terminal facility to EverWind Fuels for $60.0 million, plus working capital, which is subject to adjustment. The terminal facility has a storage capacity of 7.8 million barrels and has been included in the storage segment. We recognized a pre-tax impairment loss of $46.1 million in the first quarter of 2022 and expect to utilize the sales proceeds to reduce debt and thereby improve our debt metrics. Please refer to Note 3 for more information. Debt Amendments. On January 28, 2022, we amended and restated our $1.0 billion unsecured revolving credit agreement to extend the maturity to April 27, 2025, replace the LIBOR-based interest rate and modify other terms. Also on January 28, 2022, we amended our $100.0 million receivables financing agreement to extend the scheduled termination date to January 31, 2025, replace the LIBOR-based interest rate and modify other terms. Please refer to Note 5 for more information. Other Event 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 $5.8 million and $20.5 million for the three months ended March 31, 2022 and 2021, respectively. We recorded a gain from business interruption insurance of $4.0 million for the three months ended March 31, 2021, which is included in “Operating expenses” in the condensed consolidated statements of comprehensive income. Insurance proceeds for 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 three months ended March 31, 2022 are not necessarily indicative of the results that may be expected for the year ending December 31, 2022. 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, 2021. We have reclassified certain previously reported amounts in the consolidated financial statements and notes to conform to current-period presentation.

NEW ACCOUNTING PRONOUNCEMENT	3 Months Ended
NEW ACCOUNTING PRONOUNCEMENT	Mar. 31, 2022
Accounting Standards Update and Change in Accounting Principle [Abstract]
NEW ACCOUNTING PRONOUNCEMENT	NEW ACCOUNTING PRONOUNCEMENT Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity In August 2020, the Financial Accounting Standards Board (FASB) issued guidance intended to simplify the accounting for convertible instruments by eliminating certain accounting models for convertible debt instruments and convertible preferred stock, requiring the calculation of diluted earnings per unit to include the effect of potential unit settlement for any convertible instruments that may be settled in either cash or units, and amending the disclosure requirements for convertible instruments. The guidance is effective for annual periods beginning after December 15, 2021. Amendments may be applied using either a modified retrospective approach or a fully retrospective approach. We adopted the amended guidance on January 1, 2022 using the modified retrospective approach. While the amended guidance did not have a material impact on our financial position, results of operations, or disclosures at adoption, changes to the earnings per unit guidance could result in changes to our diluted net income (loss) per common unit. Please refer to Note 10 for additional information. Reference Rate Reform In March 2020, the FASB issued guidance intended to provide relief to companies impacted by reference rate reform. The amended guidance provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. The publication of U.S. dollar LIBOR rates for the most common tenors is expected to cease after publication on June 30, 2023, and, pursuant to the Adjustable Interest Rate (LIBOR) Act signed into law in the U.S. on March 15, 2022, the Board of Governors of the Federal Reserve System has been directed to select a benchmark replacement rate to automatically replace LIBOR in LIBOR-based contracts that lack adequate fallback provisions upon cessation. As of March 31, 2022, $402.5 million of our variable-rate debt uses LIBOR as a benchmark for establishing the interest rate. In addition, the distribution rate on our 8.50% Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units is a floating rate based on LIBOR, and the distribution rates on our 7.625% Series B and 9.00% Series C Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units convert from fixed rates to floating rates based on LIBOR in June 2022 and December 2022, respectively. The FASB’s guidance is effective as of March 12, 2020 through December 31, 2022. We adopted the guidance on a prospective basis. The guidance did not have an impact on our financial position, results of operations or disclosures at transition, but we will continue to evaluate its impact on contracts modified on or before December 31, 2022.

- Definition

The entire disclosure for change in accounting principle. Includes, but is not limited to, nature, reason, and method of adopting amendment to accounting standards or other change in accounting principle.

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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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+ Details

DISPOSITION AND IMPAIRMENT

3 Months Ended

Mar. 31, 2022

Discontinued Operations and Disposal Groups [Abstract]

DISPOSITION AND IMPAIRMENT

DISPOSITION AND IMPAIRMENTSale of Point Tupper Terminal. On February 11, 2022, we entered into an agreement to sell the equity interests in our wholly owned subsidiaries that own our Point Tupper terminal facility in Nova Scotia, Canada (the Point Tupper Terminal Operations) to EverWind Fuels for $60.0 million, plus working capital, which is subject to adjustment. The terminal facility has a storage capacity of 7.8 million barrels and has been included in the storage segment. We completed the sale on April 29, 2022 and expect to utilize the sales proceeds to reduce debt and thereby improve our debt metrics as part of our strategic plan to strengthen our balance sheet. We compared the carrying value of the Point Tupper Terminal Operations, which includes $42.2 million in cumulative foreign currency translation losses accumulated since our acquisition of the Point Tupper terminal facility in 2005, to its fair value less costs to sell, and we recognized a pre-tax impairment loss of $46.1 million in the first quarter of 2022, which is presented in "Impairment loss" on the consolidated statement of comprehensive income. We believe that the sales price of $60.0 million provides a reasonable indication of the fair value of the Point Tupper Terminal Operations as it represents an exit price in an orderly transaction between market participants. The sales price is a quoted price for identical assets and liabilities in a market that is not active and, thus, our fair value estimate falls within Level 2 of the fair value hierarchy.

During the first quarter of 2022, we determined the Point Tupper Terminal Operations met the criteria to be classified as held for sale. Accordingly, the consolidated balance sheet reflects the assets and liabilities of the Point Tupper Terminal Operations as held for sale as of March 31, 2022. The following table provides the carrying amounts of the major classes of assets and liabilities included in “Assets held for sale” and “Liabilities held for sale” on the consolidated balance sheet:


	March 31, 2022
	(Thousands of Dollars)
Cash	$	2,429
Accounts receivable	1,138
Inventories	399
Prepaid and other current assets	1,792
Property, plant and equipment, net of accumulated depreciation and impairment loss	65,716
Other long-term assets, net	14,984
Assets held for sale	$	86,458

Accounts payable	$	2,636
Deferred income tax liability	7,638
Accrued liabilities	4,355
Other long-term liabilities	9,640
Impairment reserve (cumulative translation losses)	42,227
Liabilities held for sale	$	66,496

REVENUE FROM CONTRACTS WITH CUSTOMERS

3 Months Ended

Mar. 31, 2022

Revenue from Contract with Customer [Abstract]

REVENUE FROM CONTRACTS WITH CUSTOMERS

Contract Assets and Contract Liabilities

The following table provides information about contract assets and contract liabilities from contracts with customers:


	2022				2021
	Contract Assets		Contract Liabilities		Contract Assets		Contract Liabilities
	(Thousands of Dollars)
Balances as of January 1:
Current portion	$	2,336	$	(15,443)	$	2,694	$	(22,019)
Noncurrent portion	504		(46,027)		932		(47,537)
Total	2,840		(61,470)		3,626		(69,556)

Activity:
Additions	71		(9,645)		92		(9,658)
Transfer to accounts receivable	(2,037)		—		(1,990)		—
Transfer to revenues	(83)		12,117		(125)		15,877

Total	(2,049)		2,472		(2,023)		6,219

Balances as of March 31:
Current portion	277		(13,454)		733		(16,524)
Noncurrent portion	448		(45,544)		870		(46,813)
Held for sale	66		—		—		—
Total	$	791	$	(58,998)	$	1,603	$	(63,337)

Remaining Performance Obligations

The following table presents our estimated revenue from contracts with customers for remaining performance obligations that has not yet been recognized, representing our contractually committed revenue as of March 31, 2022 (in thousands of dollars):


2022 (remaining)	$	315,545
2023	283,526
2024	189,426
2025	132,497
2026	90,396
Thereafter	93,490
Total	$	1,104,880

Our contractually committed revenue, for purposes of the tabular presentation above, is limited to customer service contracts that have fixed pricing and fixed volume terms and conditions. The revenue shown above includes $19.2 million relating to our Point Tupper Terminal Operations that was held for sale as of March 31, 2022.

Disaggregation of Revenues

The following table disaggregates our revenues:


	Three Months Ended March 31,
	2022		2021
	(Thousands of Dollars)
Pipeline segment:
Crude oil pipelines	$	86,124	$	74,588
Refined products and ammonia pipelines	102,559		94,640
Total pipeline segment revenues from contracts with customers	188,683		169,228



Storage segment:
Throughput terminals	26,441		24,794
Storage terminals (excluding lessor revenues)	50,719		73,416
Total storage segment revenues from contracts with customers	77,160		98,210
Lessor revenues	10,761		10,364
Total storage segment revenues	87,921		108,574

Fuels marketing segment:
Revenues from contracts with customers	133,260		83,855

Consolidation and intersegment eliminations	(1)		(11)

Total revenues	$	409,863	$	361,646

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

DEBT

3 Months Ended

Mar. 31, 2022

Debt Disclosure [Abstract]

DEBT

Revolving Credit Agreement

On January 28, 2022, NuStar Logistics amended and restated its $1.0 billion unsecured revolving credit agreement (the Revolving Credit Agreement) to, among other things: (i) extend the maturity date from October 27, 2023 to April 27, 2025; (ii) increase the maximum amount of letters of credit capable of being issued from $400.0 million to $500.0 million; (iii) replace LIBOR benchmark provisions with customary secured overnight financing rate, or SOFR, benchmark provisions; (iv) remove the 0.50x increase permitted in our consolidated debt coverage ratio for certain rolling periods in which an acquisition for aggregate net consideration of at least $50.0 million occurs; and (v) add baskets and exceptions to certain negative covenants.

As of March 31, 2022, we had $106.5 million of borrowings outstanding and $888.7 million available for borrowing under the Revolving Credit Agreement. Letters of credit issued under the Revolving Credit Agreement totaled $4.8 million as of March 31, 2022 and limit the amount we can borrow under the Revolving Credit Agreement. Obligations under the Revolving Credit Agreement are guaranteed by NuStar Energy and NuPOP. The Revolving Credit Agreement provides for U.S. dollar borrowings, which bear interest, at our option, based on an alternative base rate or a SOFR-based rate. The Revolving Credit Agreement and certain fees under the Receivables Financing Agreement, defined below, are the only debt arrangements with interest rates that are subject to adjustment if our debt rating is downgraded (or upgraded) by certain credit rating agencies. As of March 31, 2022, our weighted-average interest rate related to borrowings under the Revolving Credit Agreement was 3.0%.

The Revolving Credit Agreement is subject to maximum consolidated debt coverage ratio and minimum consolidated interest coverage ratio requirements, which may limit the amount we can borrow to an amount that is less than the total amount available for borrowing. For a rolling period of four quarters, the consolidated debt coverage ratio (as defined in the Revolving Credit Agreement) cannot exceed 5.00-to-1.00, and the consolidated interest coverage ratio (as defined in the Revolving Credit Agreement) must not be less than 1.75-to-1.00. As of March 31, 2022, we believe that we are in compliance with the covenants in the Revolving Credit Agreement.

Receivables Financing Agreement

NuStar Energy and NuStar Finance LLC (NuStar Finance), a special purpose entity and wholly owned subsidiary of NuStar Energy, are parties to a $100.0 million receivables financing agreement with a third-party lender, with a scheduled termination date of January 31, 2025, (the Receivables Financing Agreement) and agreements with certain of NuStar Energy’s wholly owned subsidiaries (collectively with the Receivables Financing Agreement, the Securitization Program). NuStar Energy provides a performance guarantee in connection with the Securitization Program. Under the Securitization Program, certain of NuStar Energy’s wholly owned subsidiaries sell their accounts receivable to NuStar Finance on an ongoing basis, and NuStar Finance provides the newly acquired accounts receivable as collateral for its revolving borrowings under the Receivables Financing Agreement. NuStar Finance is a separate legal entity and the assets of NuStar Finance, including these accounts receivable, are not available to satisfy the claims of creditors of NuStar Energy, its subsidiaries selling receivables under the Securitization Program or their affiliates. The amount available for borrowing is based on the availability of eligible receivables and other customary factors and conditions. On January 28, 2022, the Receivables Financing Agreement was amended to, among other things: (i) extend the scheduled termination date from September 20, 2023 to January 31, 2025; (ii) reduce the floor rate in the calculation of our borrowing rates; and (iii) replace provisions related to the LIBOR rate of interest with references to SOFR rates of interest.

Borrowings under the Receivables Financing Agreement bear interest, at NuStar Finance’s option, at a base rate or a SOFR rate, each as defined in the Receivables Financing Agreement. As of March 31, 2022, the amount of borrowings outstanding under the Receivables Financing Agreement totaled $72.0 million, the weighted-average interest rate related to outstanding borrowings was 1.9% and $132.2 million of our accounts receivable was included in the Securitization Program.

Fair Value of Long-Term Debt

The estimated fair values and carrying amounts of long-term debt, excluding finance leases, were as follows:


	March 31, 2022		December 31, 2021
	(Thousands of Dollars)
Fair value	$	3,222,517	$	3,459,153
Carrying amount	$	3,115,915	$	3,130,625

We have estimated the fair value of our publicly traded notes based upon quoted prices in active markets; therefore, we determined that the fair value of our publicly traded notes falls in Level 1 of the fair value hierarchy. With regard to our other debt, for which a quoted market price is not available, we have estimated the fair value using a discounted cash flow analysis using current incremental borrowing rates for similar types of borrowing arrangements and determined that the fair value falls in Level 2 of the fair value hierarchy. The carrying amount includes net fair value adjustments, unamortized discounts and unamortized debt issuance costs.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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+ Details

COMMITMENTS, CONTINGENCIES AND UNCERTAINTIES	3 Months Ended
COMMITMENTS, CONTINGENCIES AND UNCERTAINTIES	Mar. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS, CONTINGENCIES AND UNCERTAINTIES We have contingent liabilities resulting from various litigation, claims and commitments. We record accruals for loss contingencies when losses are considered probable and can be reasonably estimated. Legal fees associated with defending the Partnership in legal matters are expensed as incurred. We accrued $0.9 million and $0.1 million for contingent losses as of March 31, 2022 and December 31, 2021, respectively. The amount that will ultimately be paid related to such matters may differ from the recorded accruals, and the timing of such payments is uncertain. We evaluate each contingent loss at least quarterly, and more frequently as each matter progresses and develops over time, and we do not believe that the resolution of any particular claim or proceeding, or all matters in the aggregate, would have a material adverse effect on our results of operations, financial position or liquidity. COVID-19. Ongoing uncertainty surrounding the COVID-19 pandemic has caused and may continue to cause volatility and could have a significant impact on management’s estimates and assumptions in 2022 and beyond.

DERIVATIVES	3 Months Ended
DERIVATIVES	Mar. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVES	DERIVATIVES We utilize various derivative instruments to manage our exposure to interest rate risk and commodity price risk. Our risk management policies and procedures are designed to monitor interest rates, futures and swap positions and over-the-counter positions, as well as physical commodity volumes, grades, locations and delivery schedules, to help ensure that our hedging activities address our market risks. Derivative financial instruments associated with commodity price risk with respect to our petroleum product inventories and related firm commitments to purchase and/or sell such inventories were not material for any periods presented. We were a party to certain interest rate swap agreements to manage our exposure to changes in interest rates, which included forward-starting interest rate swap agreements that qualified as cash flow hedges prior to their termination. We reclassify the mark-to-market adjustments related to these cash flows hedges that were recorded in “Accumulated other comprehensive loss” (AOCI) into “Interest expense, net” as the underlying forecasted interest payments occur or if the interest payments are probable not to occur. We reclassified losses on cash flow hedges to “Interest expense, net” of $0.5 million and $1.3 million for the three months ended March 31, 2022 and 2021, respectively. As of March 31, 2022, we expect to reclassify a loss of $2.1 million to “Interest expense, net” within the next twelve months associated with unwound forward-starting interest rate swaps.

SERIES D CUMULATIVE CONVERTIBLE PREFERRED UNITS	3 Months Ended
SERIES D CUMULATIVE CONVERTIBLE PREFERRED UNITS	Mar. 31, 2022
Temporary Equity Disclosure [Abstract]
SERIES D CUMULATIVE COVERTIBLE PREFERRED UNITS	SERIES D CUMULATIVE CONVERTIBLE PREFERRED UNITS Distributions on the Series D Cumulative Convertible Preferred Units (Series D Preferred Units) are payable out of any legally available funds, accrue and are cumulative from the original issuance dates, and are payable on the 15th day (or next business day) of each of March, June, September and December, to holders of record on the first business day of each payment month. The number of Series D Preferred Units issued and outstanding as of March 31, 2022 and December 31, 2021 totaled 23,246,650. The distribution rates on the Series D Preferred Units are as follows: (i) 9.75%, or $57.6 million, per annum ($0.619 per unit per distribution period) for the first two years (beginning with the September 17, 2018 distribution); (ii) 10.75%, or $63.4 million, per annum ($0.682 per unit per distribution period) for years three through five; and (iii) the greater of 13.75%, or $81.1 million, per annum ($0.872 per unit per distribution period) or the distribution per common unit thereafter. While the Series D Preferred Units are outstanding, the Partnership will be prohibited from paying distributions on any junior securities, including the common units, unless full cumulative distributions on the Series D Preferred Units (and any parity securities) have been, or contemporaneously are being, paid or set aside for payment through the most recent Series D Preferred Unit distribution payment date. Any Series D Preferred Unit distributions in excess of $0.635 per unit may be paid, in the Partnership’s sole discretion, in additional Series D Preferred Units, with the remainder paid in cash. In April 2022, our board of directors declared distributions of $0.682 per Series D Preferred Unit to be paid on June 15, 2022.

PARTNERS' EQUITY

3 Months Ended

Mar. 31, 2022

Partners' Capital Notes [Abstract]

PARTNERS' EQUITY

Series A, B and C Preferred Units

We allocate net income to our 8.50% Series A, 7.625% Series B and 9.00% Series C Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units (collectively, the Series A, B and C Preferred Units) equal to the amount of distributions earned during the period. Distributions on our Series A, B and C Preferred Units are payable out of any legally available funds, accrue and are cumulative from the original issuance dates, and are payable on the 15th day (or next business day) of each of March, June, September and December of each year to holders of record on the first business day of each payment month.

Distribution information for our Series B and C Preferred Units is as follows:


Units	Fixed Distribution Rate Per Unit Per Quarter		Fixed Distribution Per Quarter		Date at Which Distribution Rate Becomes Floating	Floating Annual Rate (as a Percentage of the $25.00 Liquidation Preference per Unit)
			(Thousands of Dollars)

Series B Preferred Units	$	0.47657	$	7,339	June 15, 2022	Three-month LIBOR plus 5.643%
Series C Preferred Units	$	0.56250	$	3,881	December 15, 2022	Three-month LIBOR plus 6.88%

The distribution rate on our Series A Preferred Units converted from a fixed rate to a floating rate of the three-month LIBOR plus 6.766% on December 15, 2021. Distribution information for our Series A Preferred Units is as follows:


Period	Distribution Rate per Unit		Total Distribution
			(Thousands of Dollars)



March 15, 2022 - June 14, 2022	$	0.47817	$	4,332
December 15, 2021 - March 14, 2022	$	0.43606	$	3,951

In April 2022, our board of directors declared distributions with respect to the Series A, B and C Preferred Units to be paid on June 15, 2022.

Common Limited Partners

We make quarterly distributions to common unitholders of 100% of our “Available Cash,” generally defined as cash receipts less cash disbursements, including distributions to our preferred units, and cash reserves established by the general partner, in its sole discretion. These quarterly distributions are declared and paid within 45 days subsequent to each quarter-end. The common unitholders receive a distribution each quarter as determined by the board of directors, subject to limitation by the distributions in arrears, if any, on our preferred units. In April 2022, our board of directors declared distributions with respect to our common units for the quarter ended March 31, 2022.

The following table summarizes information about cash distributions to our common limited partners applicable to the period in which the distributions were earned:


Quarter Ended	Cash Distributions Per Unit		Total Cash Distributions		Record Date	Payment Date
			(Thousands of Dollars)


March 31, 2022	$	0.40	$	44,165	May 9, 2022	May 13, 2022
December 31, 2021	$	0.40	$	44,008	February 8, 2022	February 14, 2022

Accumulated Other Comprehensive Income (Loss)

The balance of and changes in the components included in AOCI were as follows:


	Three Months Ended March 31,
	2022								2021
	Foreign Currency Translation		Cash Flow Hedges		Pension and Other Postretirement Benefits		Total		Foreign Currency Translation		Cash Flow Hedges		Pension and Other Postretirement Benefits		Total
	(Thousands of Dollars)
Balance as of January 1	$	(41,761)	$	(36,486)	$	4,269	$	(73,978)	$	(42,362)	$	(42,150)	$	(12,144)	$	(96,656)
Other comprehensive income before reclassification adjustments	829		—		—		829		957		—		—		957
Net gain on pension costs reclassified into other income, net	—		—		(420)		(420)		—		—		(187)		(187)
Net loss on cash flow hedges reclassified into interest expense, net	—		529		—		529		—		1,348		—		1,348
Other	—		—		(6)		(6)		—		—		2		2
Other comprehensive income (loss)	829		529		(426)		932		957		1,348		(185)		2,120
Balance as of March 31	$	(40,932)	$	(35,957)	$	3,843	$	(73,046)	$	(41,405)	$	(40,802)	$	(12,329)	$	(94,536)

NET INCOME (LOSS) PER COMMON UNIT

3 Months Ended

Mar. 31, 2022

Earnings Per Share [Abstract]

NET INCOME (LOSS) PER COMMON UNIT

Basic net income (loss) per common unit is determined pursuant to the two-class method. Under this method, all earnings are allocated to our limited partners and participating securities based on their respective rights to receive distributions earned during the period. Participating securities include restricted units awarded under our long-term incentive plans. We compute basic net income (loss) per common unit by dividing net income (loss) attributable to common units by the weighted-average number of common units outstanding during the period.

We compute diluted net income (loss) per common unit by dividing net income (loss) attributable to common units by the sum of (i) the weighted average number of common units outstanding during the period and (ii) the effect of dilutive potential common units outstanding during the period. Dilutive potential common units may include the Series D Preferred Units and contingently issuable performance unit awards.

The Series D Preferred Units contain certain unitholder conversion and redemption features, and we use the if-converted method to calculate the dilutive effect of the conversion or redemption feature that is most advantageous to our Series D preferred unitholders. The effect of the assumed conversion or redemption of the Series D Preferred Units outstanding was antidilutive for each of the three months ended March 31, 2022 and 2021; therefore, we did not include such conversion in the computation of diluted net (loss) income per common unit.

Contingently issuable performance units are included as dilutive potential common units if it is probable that performance measures will be achieved, unless to do so would be antidilutive.

The following table details the calculation of basic and diluted net (loss) income per common unit:


	Three Months Ended March 31,
	2022		2021
	(Thousands of Dollars, Except Unit and Per Unit Data)
Net income	$	12,312	$	42,257
Distributions to preferred limited partners	(31,092)		(31,887)
Distributions to common limited partners	(44,165)		(43,834)
Distribution equivalent rights to restricted units	(633)		(598)
Distributions in excess of income	$	(63,578)	$	(34,062)

Distributions to common limited partners	$	44,165	$	43,834
Allocation of distributions in excess of income	(63,578)		(34,062)
Series D Preferred Unit accretion	(4,581)		(4,021)
Net (loss) income attributable to common units	$	(23,994)	$	5,751


Basic and diluted weighted-average common units outstanding	110,177,045		109,506,222



Basic and diluted net (loss) income per common unit	$	(0.22)	$	0.05

SUPPLEMENTAL CASH FLOW INFORMATION

3 Months Ended

Mar. 31, 2022

Supplemental Cash Flow Information [Abstract]

SUPPLEMENTAL CASH FLOW INFORMATION

Changes in current assets and current liabilities were as follows:


	Three Months Ended March 31,
	2022		2021
	(Thousands of Dollars)
Decrease (increase) in current assets:
Accounts receivable	$	(13,704)	$	12,232

Inventories	(3,062)		(6,471)

Other current assets	10,289		9,689
Increase (decrease) in current liabilities:
Accounts payable	4,284		5,067

Accrued interest payable	37,968		27,149
Accrued liabilities	(14,178)		(19,082)
Taxes other than income tax	(4,085)		(4,187)

Changes in current assets and current liabilities	$	17,512	$	24,397

The above changes in current assets and current liabilities differ from changes between amounts reflected in the applicable consolidated balance sheets due to:

•the change in the amount accrued for capital expenditures;

•the effect of foreign currency translation;

•the reclassification of certain assets and liabilities to “Assets held for sale” and “Liabilities held for sale” on the consolidated balance sheet (please refer to Note 3 for additional discussion); and

•the effect of accrued compensation expense paid with fully vested common unit awards.

Cash flows related to interest and income taxes were as follows:


	Three Months Ended March 31,
	2022		2021
	(Thousands of Dollars)
Cash paid for interest, net of amount capitalized	$	9,320	$	24,737
Cash paid for income taxes, net of tax refunds received	$	185	$	554

As of March 31, 2022 and December 31, 2021, restricted cash, representing legally restricted funds that are unavailable for general use, is included in "Other long-term assets, net" on the consolidated balance sheets. “Cash, cash equivalents and restricted cash” on the consolidated statements of cash flows is included in the consolidated balance sheets as follows:


	March 31, 2022		December 31, 2021
	(Thousands of Dollars)
Cash and cash equivalents	$	8,398	$	5,637
Assets held for sale	2,429		—
Other long-term assets, net	8,802		8,802
Cash, cash equivalents and restricted cash	$	19,629	$	14,439

SEGMENT INFORMATION

3 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

SEGMENT INFORMATION

Our reportable business segments consist of the pipeline, storage and fuels marketing segments. Our segments represent strategic business units that offer different services and products. We evaluate the performance of each segment based on its respective operating income, before general and administrative expenses and certain non-segmental depreciation and amortization expense. General and administrative expenses are not allocated to the operating segments since those expenses relate primarily to the overall management at the entity level.

Results of operations for the reportable segments were as follows:


	Three Months Ended March 31,
	2022		2021
	(Thousands of Dollars)
Revenues:

Pipeline	$	188,683	$	169,228






Storage	87,921		108,574

Fuels marketing	133,260		83,855



Consolidation and intersegment eliminations	(1)		(11)
Total revenues	$	409,863	$	361,646

Operating income (loss):
Pipeline	$	95,752	$	79,379
Storage	(14,975)		42,718
Fuels marketing	6,544		2,731

Total segment operating income	87,321		124,828
General and administrative expenses	27,071		24,492
Other depreciation and amortization expense	1,824		2,047
Total operating income	$	58,426	$	98,289

Total assets by reportable segment were as follows:


	March 31, 2022		December 31, 2021
	(Thousands of Dollars)
Pipeline	$	3,405,703	$	3,441,272
Storage	1,518,082		1,537,037
Fuels marketing	66,006		41,562
Total segment assets	4,989,791		5,019,871
Other partnership assets	140,134		136,461
Total consolidated assets	$	5,129,925	$	5,156,332

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

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+ Details

DISPOSITION AND IMPAIRMENT (Tables)

3 Months Ended

Mar. 31, 2022

Discontinued Operations and Disposal Groups [Abstract]

Assets and Liabilities Held for Sale

The following table provides the carrying amounts of the major classes of assets and liabilities included in “Assets held for sale” and “Liabilities held for sale” on the consolidated balance sheet:


	March 31, 2022
	(Thousands of Dollars)
Cash	$	2,429
Accounts receivable	1,138
Inventories	399
Prepaid and other current assets	1,792
Property, plant and equipment, net of accumulated depreciation and impairment loss	65,716
Other long-term assets, net	14,984
Assets held for sale	$	86,458

Accounts payable	$	2,636
Deferred income tax liability	7,638
Accrued liabilities	4,355
Other long-term liabilities	9,640
Impairment reserve (cumulative translation losses)	42,227
Liabilities held for sale	$	66,496

- Definition

Tabular disclosure of information related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

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+ Details

REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables)

3 Months Ended

Mar. 31, 2022

Revenue from Contract with Customer [Abstract]

Contract with Customer, Asset and Liability [Table Text Block]

The following table provides information about contract assets and contract liabilities from contracts with customers:


	2022				2021
	Contract Assets		Contract Liabilities		Contract Assets		Contract Liabilities
	(Thousands of Dollars)
Balances as of January 1:
Current portion	$	2,336	$	(15,443)	$	2,694	$	(22,019)
Noncurrent portion	504		(46,027)		932		(47,537)
Total	2,840		(61,470)		3,626		(69,556)

Activity:
Additions	71		(9,645)		92		(9,658)
Transfer to accounts receivable	(2,037)		—		(1,990)		—
Transfer to revenues	(83)		12,117		(125)		15,877

Total	(2,049)		2,472		(2,023)		6,219

Balances as of March 31:
Current portion	277		(13,454)		733		(16,524)
Noncurrent portion	448		(45,544)		870		(46,813)
Held for sale	66		—		—		—
Total	$	791	$	(58,998)	$	1,603	$	(63,337)

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]


2022 (remaining)	$	315,545
2023	283,526
2024	189,426
2025	132,497
2026	90,396
Thereafter	93,490
Total	$	1,104,880

Disaggregation of Revenue [Table Text Block]

The following table disaggregates our revenues:


	Three Months Ended March 31,
	2022		2021
	(Thousands of Dollars)
Pipeline segment:
Crude oil pipelines	$	86,124	$	74,588
Refined products and ammonia pipelines	102,559		94,640
Total pipeline segment revenues from contracts with customers	188,683		169,228



Storage segment:
Throughput terminals	26,441		24,794
Storage terminals (excluding lessor revenues)	50,719		73,416
Total storage segment revenues from contracts with customers	77,160		98,210
Lessor revenues	10,761		10,364
Total storage segment revenues	87,921		108,574

Fuels marketing segment:
Revenues from contracts with customers	133,260		83,855

Consolidation and intersegment eliminations	(1)		(11)

Total revenues	$	409,863	$	361,646

DEBT (Tables)

3 Months Ended

Mar. 31, 2022

Debt Disclosure [Abstract]

Fair Value and Carrying Value of Debt [Table Text Block]

The estimated fair values and carrying amounts of long-term debt, excluding finance leases, were as follows:


	March 31, 2022		December 31, 2021
	(Thousands of Dollars)
Fair value	$	3,222,517	$	3,459,153
Carrying amount	$	3,115,915	$	3,130,625

PARTNERS' EQUITY (Tables)

3 Months Ended

Mar. 31, 2022

Distribution Made to Preferred Limited Partner [Line Items]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The balance of and changes in the components included in AOCI were as follows:


	Three Months Ended March 31,
	2022								2021
	Foreign Currency Translation		Cash Flow Hedges		Pension and Other Postretirement Benefits		Total		Foreign Currency Translation		Cash Flow Hedges		Pension and Other Postretirement Benefits		Total
	(Thousands of Dollars)
Balance as of January 1	$	(41,761)	$	(36,486)	$	4,269	$	(73,978)	$	(42,362)	$	(42,150)	$	(12,144)	$	(96,656)
Other comprehensive income before reclassification adjustments	829		—		—		829		957		—		—		957
Net gain on pension costs reclassified into other income, net	—		—		(420)		(420)		—		—		(187)		(187)
Net loss on cash flow hedges reclassified into interest expense, net	—		529		—		529		—		1,348		—		1,348
Other	—		—		(6)		(6)		—		—		2		2
Other comprehensive income (loss)	829		529		(426)		932		957		1,348		(185)		2,120
Balance as of March 31	$	(40,932)	$	(35,957)	$	3,843	$	(73,046)	$	(41,405)	$	(40,802)	$	(12,329)	$	(94,536)

Preferred Limited Partner [Member]

Distribution Made to Preferred Limited Partner [Line Items]

Distributions Made to Limited Partner, by Distribution [Table Text Block]

Distribution information for our Series B and C Preferred Units is as follows:


Units	Fixed Distribution Rate Per Unit Per Quarter		Fixed Distribution Per Quarter		Date at Which Distribution Rate Becomes Floating	Floating Annual Rate (as a Percentage of the $25.00 Liquidation Preference per Unit)
			(Thousands of Dollars)

Series B Preferred Units	$	0.47657	$	7,339	June 15, 2022	Three-month LIBOR plus 5.643%
Series C Preferred Units	$	0.56250	$	3,881	December 15, 2022	Three-month LIBOR plus 6.88%


Period	Distribution Rate per Unit		Total Distribution
			(Thousands of Dollars)



March 15, 2022 - June 14, 2022	$	0.47817	$	4,332
December 15, 2021 - March 14, 2022	$	0.43606	$	3,951

Common Limited Partner [Member]

Distribution Made to Preferred Limited Partner [Line Items]

Distributions Made to Limited Partner, by Distribution [Table Text Block]

The following table summarizes information about cash distributions to our common limited partners applicable to the period in which the distributions were earned:


Quarter Ended	Cash Distributions Per Unit		Total Cash Distributions		Record Date	Payment Date
			(Thousands of Dollars)


March 31, 2022	$	0.40	$	44,165	May 9, 2022	May 13, 2022
December 31, 2021	$	0.40	$	44,008	February 8, 2022	February 14, 2022

NET INCOME (LOSS) PER COMMON UNIT (Tables)

3 Months Ended

Mar. 31, 2022

Earnings Per Share [Abstract]

Schedule of Net (Loss) Income Per Common Unit

The following table details the calculation of basic and diluted net (loss) income per common unit:


	Three Months Ended March 31,
	2022		2021
	(Thousands of Dollars, Except Unit and Per Unit Data)
Net income	$	12,312	$	42,257
Distributions to preferred limited partners	(31,092)		(31,887)
Distributions to common limited partners	(44,165)		(43,834)
Distribution equivalent rights to restricted units	(633)		(598)
Distributions in excess of income	$	(63,578)	$	(34,062)

Distributions to common limited partners	$	44,165	$	43,834
Allocation of distributions in excess of income	(63,578)		(34,062)
Series D Preferred Unit accretion	(4,581)		(4,021)
Net (loss) income attributable to common units	$	(23,994)	$	5,751


Basic and diluted weighted-average common units outstanding	110,177,045		109,506,222



Basic and diluted net (loss) income per common unit	$	(0.22)	$	0.05

SUPPLEMENTAL CASH FLOW INFORMATION (Tables)

3 Months Ended

Mar. 31, 2022

Supplemental Cash Flow Information [Abstract]

Schedule of Changes in Current Assets and Liabilities [Table Text Block]

Changes in current assets and current liabilities were as follows:


	Three Months Ended March 31,
	2022		2021
	(Thousands of Dollars)
Decrease (increase) in current assets:
Accounts receivable	$	(13,704)	$	12,232

Inventories	(3,062)		(6,471)

Other current assets	10,289		9,689
Increase (decrease) in current liabilities:
Accounts payable	4,284		5,067

Accrued interest payable	37,968		27,149
Accrued liabilities	(14,178)		(19,082)
Taxes other than income tax	(4,085)		(4,187)

Changes in current assets and current liabilities	$	17,512	$	24,397

Schedule of Supplemental Cash Flow Information [Table Text Block]

Cash flows related to interest and income taxes were as follows:


	Three Months Ended March 31,
	2022		2021
	(Thousands of Dollars)
Cash paid for interest, net of amount capitalized	$	9,320	$	24,737
Cash paid for income taxes, net of tax refunds received	$	185	$	554

Schedule of Cash and Cash Equivalents [Table Text Block]

“Cash, cash equivalents and restricted cash” on the consolidated statements of cash flows is included in the consolidated balance sheets as follows:


	March 31, 2022		December 31, 2021
	(Thousands of Dollars)
Cash and cash equivalents	$	8,398	$	5,637
Assets held for sale	2,429		—
Other long-term assets, net	8,802		8,802
Cash, cash equivalents and restricted cash	$	19,629	$	14,439

SEGMENT INFORMATION (Tables)

3 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

Results of operations for the reportable segments were as follows:


	Three Months Ended March 31,
	2022		2021
	(Thousands of Dollars)
Revenues:

Pipeline	$	188,683	$	169,228






Storage	87,921		108,574

Fuels marketing	133,260		83,855



Consolidation and intersegment eliminations	(1)		(11)
Total revenues	$	409,863	$	361,646

Operating income (loss):
Pipeline	$	95,752	$	79,379
Storage	(14,975)		42,718
Fuels marketing	6,544		2,731

Total segment operating income	87,321		124,828
General and administrative expenses	27,071		24,492
Other depreciation and amortization expense	1,824		2,047
Total operating income	$	58,426	$	98,289

Reconciliation of Assets from Segment to Consolidated [Table Text Block]

Total assets by reportable segment were as follows:


	March 31, 2022		December 31, 2021
	(Thousands of Dollars)
Pipeline	$	3,405,703	$	3,441,272
Storage	1,518,082		1,537,037
Fuels marketing	66,006		41,562
Total segment assets	4,989,791		5,019,871
Other partnership assets	140,134		136,461
Total consolidated assets	$	5,129,925	$	5,156,332

ORGANIZATION AND BASIS OF PRESENTATION Narrative 1 (Details)	3 Months Ended
	Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of business segments	3

ORGANIZATION AND BASIS OF PRESENTATION Narrative 2 - Point Tupper Terminal Sale Agreement (Details) $ in Thousands, bbl in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Apr. 29, 2022 USD ($) bbl
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups [Line Items]
Pre-tax impairment loss	$ 46,122	$ 0
Impairment loss
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups [Line Items]
Pre-tax impairment loss	$ 46,100
Subsequent Event [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups [Line Items]
Sales price of Point Tupper terminal facility			$ 60,000
Storage Segment \| Subsequent Event [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups [Line Items]
Storage capacity of terminal sold \| bbl			7.8

ORGANIZATION AND BASIS OF PRESENTATION Narrative 3 - Debt Amendments (Details) $ in Millions	Mar. 31, 2022 USD ($)
Revolving Credit Agreement [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 1,000.0
Receivables Financing Agreement [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 100.0

ORGANIZATION AND BASIS OF PRESENTATION Narrative 4 - Selby Fire (Details) - USD ($) $ in Thousands		3 Months Ended
	Oct. 15, 2019	Mar. 31, 2022	Mar. 31, 2021
Unusual or Infrequent Item, or Both [Line Items]
Impact of fire at Selby, CA terminal	our terminal facility in Selby, California experienced a fire that destroyed two storage tanks and temporarily shut down the terminal
Insurance proceeds received		$ 5,800	$ 20,500
Business Interruption Insurance from Selby, California Fire [Member] \| Operating Expenses [Member]
Unusual or Infrequent Item, or Both [Line Items]
Insurance proceeds received			$ 4,000

NEW ACCOUNTING PRONOUNCEMENT Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term debt	$ 3,115,915	$ 3,130,625
Series A Preferred Limited Partner [Member]
Debt Instrument [Line Items]
Preferred units distribution percentage, per annum	8.50%
Series B Preferred Limited Partner [Member]
Debt Instrument [Line Items]
Preferred units distribution percentage, per annum	7.625%
Series C Preferred Limited Partner [Member]
Debt Instrument [Line Items]
Preferred units distribution percentage, per annum	9.00%
London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Long-term debt	$ 402,500

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References + Details

DISPOSITION AND IMPAIRMENT Narrative (Details) $ in Thousands, bbl in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Apr. 29, 2022 USD ($) bbl
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups [Line Items]
Foreign currency translation losses	$ 42,200
Pre-tax impairment loss	46,122	$ 0
Subsequent Event [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups [Line Items]
Sales price of Point Tupper terminal facility			$ 60,000
Impairment loss
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups [Line Items]
Pre-tax impairment loss	$ 46,100
Storage Segment \| Subsequent Event [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups [Line Items]
Storage capacity of terminal sold \| bbl			7.8

DISPOSITION AND IMPAIRMENT Table (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups [Line Items]
Cash	$ 2,429	$ 0
Accounts receivable	1,138
Inventories	399
Prepaid and other current assets	1,792
Property, plant and equipment, net of accumulated depreciation and impairment loss	65,716
Other long-term assets, net	14,984
Assets held for sale	86,458	0
Accounts payable	2,636
Deferred income tax liability	7,638
Accrued liabilities	4,355
Other long-term liabilities	9,640
Impairment reserve (cumulative translation losses)	42,227
Liabilities held for sale	$ 66,496	$ 0

REVENUE FROM CONTRACTS WITH CUSTOMERS Table 1 - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Contract assets
Noncurrent portion	$ 448	$ 870	$ 504	$ 932
Total	791	1,603	2,840	3,626
Additions	71	92
Transfer to accounts receivable	(2,037)	(1,990)
Transfer to revenues, contract assets	(83)	(125)
Total activity	(2,049)	(2,023)
Contract liabilities
Noncurrent portion	(45,544)	(46,813)	(46,027)	(47,537)
Total	(58,998)	(63,337)	(61,470)	(69,556)
Additions	(9,645)	(9,658)
Transfer to revenues, contract liabilities	12,117	15,877
Total activity	2,472	6,219
Assets held for sale [Member]
Contract assets
Current portion	66	0
Liabilities Held for Sale
Contract liabilities
Current portion	0	0
Other current assets
Contract assets
Current portion	277	733	2,336	2,694
Accrued liabilities
Contract liabilities
Current portion	$ (13,454)	$ (16,524)	$ (15,443)	$ (22,019)

REVENUE FROM CONTRACTS WITH CUSTOMERS Table 2 - Expected Timing of Satisfaction of Performance Obligations (Details) $ in Thousands	Mar. 31, 2022 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 1,104,880
Point Tupper Terminal Operations
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 19,200
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	9 months
Revenue, remaining performance obligation, amount	$ 315,545
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, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 283,526
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 189,426
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 132,497
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 90,396
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount	$ 93,490

REVENUE FROM CONTRACTS WITH CUSTOMERS Table 3 - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total revenues	$ (1)	$ (11)
Pipeline Segment
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	188,683	169,228
Pipeline Segment \| Crude Oil Pipelines [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	86,124	74,588
Pipeline Segment \| Refined Products and Ammonia Pipelines [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	102,559	94,640
Storage Segment
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	77,160	98,210
Lessor revenues	10,761	10,364
Total revenues	87,921	108,574
Storage Segment \| Throughput Terminal [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	26,441	24,794
Storage Segment \| Storage Terminal [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	50,719	73,416
Fuels Marketing Segment
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	133,260	83,855
Operating Segments, Net of Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Total revenues	$ 409,863	$ 361,646

DEBT Narrative 1 - Revolving Credit Agreement (Details) - USD ($) $ in Thousands		3 Months Ended
	Jan. 28, 2022	Mar. 31, 2022	Jan. 27, 2022
Debt Instrument [Line Items]
Line of credit facility, description of amendment	On January 28, 2022, NuStar Logistics amended and restated its $1.0 billion unsecured revolving credit agreement (the Revolving Credit Agreement) to, among other things: (i) extend the maturity date from October 27, 2023 to April 27, 2025; (ii) increase the maximum amount of letters of credit capable of being issued from $400.0 million to $500.0 million; (iii) replace LIBOR benchmark provisions with customary secured overnight financing rate, or SOFR, benchmark provisions; (iv) remove the 0.50x increase permitted in our consolidated debt coverage ratio for certain rolling periods in which an acquisition for aggregate net consideration of at least $50.0 million occurs; and (v) add baskets and exceptions to certain negative covenants.
Revolving Credit Agreement [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 1,000,000
Line of credit facility, maximum letters of credit		500,000	$ 400,000
Long-term debt		106,500
Current remaining borrowing capacity		888,700
Letters of credit outstanding, amount		$ 4,800
Line of credit facility, interest rate description		The Revolving Credit Agreement and certain fees under the Receivables Financing Agreement, defined below, are the only debt arrangements with interest rates that are subject to adjustment if our debt rating is downgraded (or upgraded) by certain credit rating agencies.
Line of credit facility, weighted-average interest rate		3.00%
Line of credit facility, covenant terms		For a rolling period of four quarters, the consolidated debt coverage ratio (as defined in the Revolving Credit Agreement) cannot exceed 5.00-to-1.00, and the consolidated interest coverage ratio (as defined in the Revolving Credit Agreement) must not be less than 1.75-to-1.00.

DEBT - Narrative 2 - Receivables Financing Agreement (Details) - Receivables Financing Agreement [Member] $ in Millions	Mar. 31, 2022 USD ($)
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 100.0
Long-term debt	$ 72.0
Weighted average interest rate	1.90%
Debt instrument, collateral amount	$ 132.2

DEBT Table 1 - Fair Value of Long-Term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Disclosure [Abstract]
Fair value, long-term debt	$ 3,222,517	$ 3,459,153
Long-term debt, excluding finance leases	$ 3,115,915	$ 3,130,625

- Definition

+ References + Details

COMMITMENTS, CONTINGENCIES AND UNCERTAINTIES Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Loss contingency accrual, at carrying value	$ 0.9	$ 0.1

DERIVATIVES Narrative 1 (Details) - USD ($) $ in Millions	3 Months Ended
DERIVATIVES Narrative 1 (Details) - USD ($) $ in Millions	Mar. 31, 2022	Mar. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Loss to be reclassified during next 12 months	$ (2.1)
Interest rate swaps \| Interest expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified from AOCI into interest expense, net	$ (0.5)	$ (1.3)

SERIES D CUMULATIVE CONVERTIBLE PREFERRED UNITS Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Class of Stock [Line Items]
Series D preferred units issued		23,246,650	23,246,650
Series D preferred units outstanding		23,246,650	23,246,650
Series D Preferred Limited Partner [Member]
Class of Stock [Line Items]
Required amount of per unit cash dividends to permit dividend paid in kind		$ 0.635
Preferred Stock, Distributions, Period - June 29, 2018 to June 28, 2020 [Member] \| Series D Preferred Limited Partner [Member]
Class of Stock [Line Items]
Preferred units distribution percentage, per annum		9.75%
Preferred units, distribution rate, per annum		$ 57.6
Preferred stock, dividend amount, per unit, per distribution period		$ 0.619
Preferred Stock, Distributions, Period - June 29, 2020 to June 28, 2023 [Member] \| Series D Preferred Limited Partner [Member]
Class of Stock [Line Items]
Preferred units distribution percentage, per annum		10.75%
Preferred units, distribution rate, per annum		$ 63.4
Preferred stock, dividend amount, per unit, per distribution period		$ 0.682
Preferred Stock, Distributions, Period - June 29, 2023 and thereafter [Member] \| Series D Preferred Limited Partner [Member] \| Minimum [Member]
Class of Stock [Line Items]
Preferred units distribution percentage, per annum		13.75%
Preferred units, distribution rate, per annum		$ 81.1
Preferred stock, dividend amount, per unit, per distribution period		$ 0.872
Subsequent Event [Member] \| Series D Preferred Limited Partner [Member]
Class of Stock [Line Items]
Preferred unit distribution	$ 0.682

PARTNERS' EQUITY Narrative 1 (Details)	3 Months Ended
PARTNERS' EQUITY Narrative 1 (Details)	Mar. 31, 2022
Series A Preferred Limited Partner [Member]
Class of Stock [Line Items]
Preferred units distribution percentage, per annum	8.50%
Series B Preferred Limited Partner [Member]
Class of Stock [Line Items]
Preferred units distribution percentage, per annum	7.625%
Series C Preferred Limited Partner [Member]
Class of Stock [Line Items]
Preferred units distribution percentage, per annum	9.00%

PARTNERS' EQUITY Table 1 - Cash Distributions - Preferred Units (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) $ / shares
Series B Preferred Limited Partner [Member]
Distribution Made to Preferred Limited Partner [Line Items]
Preferred unit distribution	$ 0.47657
Fixed distribution per quarter \| $	$ 7,339
Preferred units, liquidation preference	$ 25.00
Series B Preferred Limited Partner [Member] \| London Interbank Offered Rate (LIBOR) \| June 15, 2022 and Thereafter
Distribution Made to Preferred Limited Partner [Line Items]
Preferred units, distribution payment rate, basis spread on floating rate (three-month LIBOR)	5.643%
Series C Preferred Limited Partner [Member]
Distribution Made to Preferred Limited Partner [Line Items]
Preferred unit distribution	$ 0.56250
Fixed distribution per quarter \| $	$ 3,881
Preferred units, liquidation preference	$ 25.00
Series C Preferred Limited Partner [Member] \| London Interbank Offered Rate (LIBOR) \| December 15, 2022 and Thereafter
Distribution Made to Preferred Limited Partner [Line Items]
Preferred units, distribution payment rate, basis spread on floating rate (three-month LIBOR)	6.88%

PARTNERS' EQUITY Table 2 - Cash Distributions - Preferred Units - Floating Distribution Rate (Details) - Series A Preferred Limited Partner [Member] - USD ($)	3 Months Ended
	Jun. 14, 2022	Mar. 31, 2022	Mar. 14, 2022
Distribution Made to Preferred Limited Partner [Line Items]
Per unit distribution, variable, per quarter			$ 0.43606
Distributions to partners			$ 3,951,000
December 15, 2021 and Thereafter \| London Interbank Offered Rate (LIBOR)
Distribution Made to Preferred Limited Partner [Line Items]
Preferred units, distribution payment rate, basis spread on floating rate (three-month LIBOR)		6.766%
Subsequent Event [Member]
Distribution Made to Preferred Limited Partner [Line Items]
Per unit distribution, variable, per quarter	$ 0.47817
Distributions to partners	$ 4,332,000

PARTNERS' EQUITY Narrative 2 (Details)	3 Months Ended
PARTNERS' EQUITY Narrative 2 (Details)	Mar. 31, 2022
Partners' Capital Notes [Abstract]
Percent of available cash distributed	100.00%
Number of days within which distribution is paid to common unitholders	45

PARTNERS' EQUITY Table 3 - Cash Distributions Declared - Common Limited Partners (Details) - Common Limited Partner [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Distribution Made to Common Limited Partners [Line Items]
Cash distributions per unit	$ 0.40	$ 0.40
Cash distributions applicable to common unitholders	$ 44,165	$ 44,008
Distribution date of record	May 09, 2022	Feb. 08, 2022
Distribution payment date	May 13, 2022	Feb. 14, 2022

PARTNERS' EQUITY Table 4 - Balance of and Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (73,978)
Ending balance	(73,046)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(41,761)	$ (42,362)
Other comprehensive income before reclassification adjustments	829	957
Other	0	0
Other comprehensive income (loss)	829	957
Ending balance	(40,932)	(41,405)
Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(36,486)	(42,150)
Other comprehensive income before reclassification adjustments	0	0
Other	0	0
Other comprehensive income (loss)	529	1,348
Ending balance	(35,957)	(40,802)
Pension and Other Postretirement Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	4,269	(12,144)
Other comprehensive income before reclassification adjustments	0	0
Other	(6)	2
Other comprehensive income (loss)	(426)	(185)
Ending balance	3,843	(12,329)
Total
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(73,978)	(96,656)
Other comprehensive income before reclassification adjustments	829	957
Other	(6)	2
Other comprehensive income (loss)	932	2,120
Ending balance	(73,046)	(94,536)
Other income, net \| Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net (gain) loss reclassified from AOCI	0	0
Other income, net \| Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net (gain) loss reclassified from AOCI	0	0
Other income, net \| Pension and Other Postretirement Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net (gain) loss reclassified from AOCI	(420)	(187)
Other income, net \| Total
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net (gain) loss reclassified from AOCI	(420)	(187)
Interest expense, net \| Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net (gain) loss reclassified from AOCI	0	0
Interest expense, net \| Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net (gain) loss reclassified from AOCI	529	1,348
Interest expense, net \| Pension and Other Postretirement Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net (gain) loss reclassified from AOCI	0	0
Interest expense, net \| Total
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net (gain) loss reclassified from AOCI	$ 529	$ 1,348

NET INCOME (LOSS) PER COMMON UNIT Table - Net Income (Loss) per Common Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net income (loss)	$ 12,312	$ 42,257
Distributions to preferred limited partners	(31,092)	(31,887)
Distributions to common limited partners	(44,165)	(43,834)
Distribution equivalent rights to restricted units	(633)	(598)
Distributions in excess of income	(63,578)	(34,062)
Distributions to common limited partners	44,165	43,834
Allocation of distributions in excess of income	(63,578)	(34,062)
Series D Preferred Unit accretion	(4,581)	(4,021)
Net (loss) income attributable to common units	$ (23,994)	$ 5,751
Basic weighted-average common units outstanding	110,177,045	109,506,222
Diluted weighted-average common units outstanding	110,177,045	109,506,222
Basic net income (loss) per common unit	$ (0.22)	$ 0.05
Diluted net income (loss) per common unit	$ (0.22)	$ 0.05

SUPPLEMENTAL CASH FLOW INFORMATION - Table 1 - Changes in Current Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Supplemental Cash Flow Information [Abstract]
Decrease (increase) in accounts receivable	$ (13,704)	$ 12,232
Decrease (increase) in inventories	(3,062)	(6,471)
Decrease (increase) in other currrent assets	10,289	9,689
Increase (decrease) in accounts payable	4,284	5,067
Increase (decrease) in accrued interest payable	37,968	27,149
Increase (decrease) in accrued liabilities	(14,178)	(19,082)
Increase (decrease) in taxes other than income tax	(4,085)	(4,187)
Changes in current assets and current liabilities	$ 17,512	$ 24,397

SUPPLEMENTAL CASH FLOW INFORMATION - Table 2 - Cash Flows Related to Interest and Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Supplemental Cash Flow Information [Abstract]
Cash paid for interest, net of amount capitalized	$ 9,320	$ 24,737
Cash paid for income taxes, net of tax refunds received	$ 185	$ 554

SUPPLEMENTAL CASH FLOW INFORMATION - Table 3 - Schedule of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents	$ 8,398	$ 5,637
Assets held for sale	2,429	0
Cash, cash equivalents and restricted cash	19,629	14,439	$ 37,047	$ 162,426
Cash and cash equivalents [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents	8,398	5,637
Assets held for sale [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Assets held for sale	2,429	0
Other long-term assets, net [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Other long-term assets, net	$ 8,802	$ 8,802

SEGMENT INFORMATION Table 1 - Results of Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating income (loss):
General and administrative expenses	$ 27,071	$ 24,492
Other depreciation and amortization expense	1,824	2,047
Operating income (loss)	58,426	98,289
Storage Segment
Revenues:
Total revenues	87,921	108,574
Operating Segments, Net of Intersegment Eliminations
Revenues:
Total revenues	409,863	361,646
Total segment
Operating income (loss):
Operating income (loss)	87,321	124,828
Total segment \| Pipeline Segment
Revenues:
Total revenues	188,683	169,228
Operating income (loss):
Operating income (loss)	95,752	79,379
Total segment \| Storage Segment
Revenues:
Total revenues	87,921	108,574
Operating income (loss):
Operating income (loss)	(14,975)	42,718
Total segment \| Fuels Marketing Segment
Revenues:
Total revenues	133,260	83,855
Operating income (loss):
Operating income (loss)	6,544	2,731
Intersegment Eliminations [Member]
Revenues:
Total revenues	$ (1)	$ (11)

SEGMENT INFORMATION Table 2 - Assets by Reportable Segment (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Segment Information
Total assets	$ 5,129,925	$ 5,156,332
Total segment assets
Segment Information
Total assets	4,989,791	5,019,871
Total segment assets \| Pipeline Segment
Segment Information
Total assets	3,405,703	3,441,272
Total segment assets \| Storage Segment
Segment Information
Total assets	1,518,082	1,537,037
Total segment assets \| Fuels Marketing Segment
Segment Information
Total assets	66,006	41,562
Other partnership assets
Segment Information
Total assets	$ 140,134	$ 136,461

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(A))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iv))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
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