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Debt | 3 Months Ended
--- | ---
Mar. 31, 2019
Debt Disclosure [Abstract] |
Debt | Debt
| March 31, 2019 |  | December 31, 2018
Debt classified as current liabilities: |  |  |
Hancock County industrial revenue bonds ("IRBs") due April 1, 2028, interest payable quarterly (variable interest rates (not to exceed 12%)) (1) | $ | 7.8 |  |  | $ | 7.8 |
U.S. revolving credit facility (2) | 35.3 |  |  | 23.3 |
Other short-term borrowings | 3.4 |  |  | — |
Debt classified as non-current liabilities: |  |  |
7.5% senior secured notes due June 1, 2021, net of debt discount of $1.2 million and $1.4 million, respectively, interest payable semiannually | 248.8 |  |  | 248.6 |
Total | $ | 295.3 |  |  | $ | 279.7 |
(1) The IRBs are classified as current liabilities because they are remarketed weekly and could be required to be repaid upon demand if there is a failed remarketing. The IRB interest rate at March 31, 2019 was 1.69%. (2) The U.S. revolving credit facility is classified as a current liability because we repay amounts outstanding and reborrow funds based on our working capital requirements. Borrowings bear interest at our option of either LIBOR or a base rate, plus, in each case, an applicable interest margin. At March 31, 2019, interest on the base rate portion was 5.75%, and interest on the LIBOR portion was 3.74%. 7.5% Notes due 2021 General. On June 4, 2013, we issued $250.0 million of our 7.5% Notes due June 1, 2021 (the "2021 Notes") in a private offering exempt from the registration requirements of the Securities Act of 1933, as amended. The 2021 Notes were issued at a discount and bear interest at the rate of 7.5% per annum on the principal amount, payable semi-annually in arrears in cash on June 1st and December 1st of each year. Fair Value. Fair value for our 2021 Notes was based on the latest trading data available and was $251.3 million and $247.9 million, as of March 31, 2019 and December 31, 2018, respectively. Although we use quoted market prices for identical debt instruments, the markets on which they trade are not considered to be active and are therefore considered Level 2 fair value measurements. Glencore Loan On April 29, 2019, we entered into the Loan Agreement with Glencore pursuant to which the Company borrowed $40.0 million on that date. The Loan matures on December 31, 2021, and is to be repaid in twenty-four (24) equal monthly installments of principal, together with interest, beginning on January 31, 2020. The Loan bears interest at a floating rate equal to LIBOR plus 5.375% and is not secured by any collateral. U.S. Revolving Credit Facility We and certain of our direct and indirect domestic subsidiaries have a senior secured revolving credit facility with a syndicate of lenders (the "U.S. revolving credit facility"). The U.S. revolving credit facility provides for borrowings of up to $175.0 million in the aggregate, including up to $110.0 million under a letter of credit sub-facility, and also includes an uncommitted accordion feature whereby borrowers may increase the capacity of the U.S. revolving credit facility by up to $50.0 million, subject to agreement with the lenders. The U.S. revolving credit facility matures on the earlier of May 2023 or six months before the stated maturity of our outstanding senior secured notes. Any letters of credit issued and outstanding under the U.S. revolving credit facility reduce our borrowing availability on a dollar-for-dollar basis. At March 31, 2019, there were $35.3 million in outstanding borrowings under our U.S. revolving credit facility. Principal payments, if any, are due upon maturity of the U.S. revolving credit facility.
Status of our U.S. revolving credit facility: | March 31, 2019
Credit facility maximum amount | $ | 175.0 |
Borrowing availability | 175.0 |
Outstanding letters of credit issued | 37.7 |
Outstanding borrowings | 35.3 |
Borrowing availability, net of outstanding letters of credit and borrowings | 102.0 |
Iceland Revolving Credit Facility Our wholly-owned subsidiary, Nordural Grundartangi ehf ("Grundartangi"), has entered into a $50.0 million revolving credit facility agreement with Landsbankinn hf., dated November 2013 as amended. Under the terms of the Iceland revolving credit facility, when Grundartangi borrows funds it will designate a repayment date, which may be any date prior to the maturity of the Iceland revolving credit facility. The Iceland revolving credit facility has a term through November 2020.
Status of our Iceland revolving credit facility: | March 31, 2019
Credit facility maximum amount | $ | 50.0 |
Borrowing availability | 50.0 |
Outstanding letters of credit issued | — |
Outstanding borrowings | — |
Borrowing availability, net of borrowings | 50.0 |

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- 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 -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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