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DEBT
9 Months Ended
Sep. 30, 2021
Debt Disclosure [Abstract]  
DEBT DEBT
Revolving Credit Agreement
On February 16, 2021, NuStar Logistics amended its $1.0 billion revolving credit agreement with a maturity date of October 27, 2023 (the Revolving Credit Agreement) to, among other things, expand certain adjustments related to our maximum consolidated debt coverage ratio and minimum consolidated interest coverage ratio.

As of September 30, 2021, we had $87.5 million of borrowings outstanding and $907.3 million available for borrowing under the Revolving Credit Agreement. Letters of credit issued under the Revolving Credit Agreement totaled $5.2 million as of September 30, 2021 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 LIBOR-based rate. The interest rate on the Revolving Credit Agreement is subject to adjustment if our debt rating is downgraded (or upgraded) by certain credit rating agencies. As of September 30, 2021, our weighted-average interest rate related to borrowings under the Revolving Credit Agreement was 3.1%.

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 under the Revolving Credit Agreement to an amount less than the total amount available for borrowing. For the rolling period of four quarters ended September 30, 2021, the consolidated debt coverage ratio (as defined in the Revolving Credit Agreement) could not 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 September 30, 2021, we believe that we are in compliance with the covenants in the Revolving Credit Agreement.
NuStar Logistics Senior Notes
We repaid our $300.0 million of 6.75% senior notes due February 1, 2021 with borrowings under our Revolving Credit Agreement.

As of September 30, 2021, we had adequate amounts available under our Revolving Credit Agreement to repay our $250.0 million of 4.75% senior notes due February 1, 2022. Therefore, these senior note maturities are classified as long-term debt as of September 30, 2021. On November 1, 2021, we repaid these notes with the proceeds from the Eastern U.S. Terminals Disposition.

Term Loan Credit Agreement
On February 16, 2021, we terminated a three-year unsecured term loan credit agreement with certain lenders and Oaktree Fund Administration, LLC, as administrative agent for the lenders (the Term Loan). On April 19, 2020, we entered into the Term Loan, which provided for an aggregate commitment of up to $750.0 million. We drew $500.0 million on April 21, 2020, which we repaid on September 16, 2020. We recognized a loss from extinguishment of debt of $137.9 million in the third quarter of 2020, which included early repayment premiums totaling $97.6 million and costs of $40.3 million related to unamortized debt issuance costs, unamortized discount and a commitment fee.

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 maturity date of September 20, 2023, (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. NuStar Finance’s sole activity consists of purchasing receivables from NuStar Energy’s subsidiaries that participate in the Securitization Program and providing these receivables as collateral for NuStar Finance’s revolving borrowings under the Securitization Program. 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.

Borrowings by NuStar Finance under the Receivables Financing Agreement bear interest at the applicable bank rate, as defined under the Receivables Financing Agreement. The weighted average interest rate related to outstanding borrowings under the Securitization Program as of September 30, 2021 was 2.3%. As of September 30, 2021, $123.8 million of our accounts receivable was included in the Securitization Program. The amount of borrowings outstanding under the Receivables Financing Agreement totaled $75.1 million as of September 30, 2021.

Fair Value of Long-Term Debt
The estimated fair values and carrying amounts of long-term debt, excluding finance leases, were as follows:
September 30, 2021December 31, 2020
 (Thousands of Dollars)
Fair value$3,668,320 $3,799,378 
Carrying amount$3,347,960 $3,539,258 

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.