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Debt (Tables)

9 Months Ended

Sep. 30, 2022

Debt Disclosure [Abstract]

Schedule of debt

			September 30, 2022						December 31, 2021
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)			63.5						63.6
Iceland Revolving Credit Facility (3)			50.0						50.0
Debt classified as non-current liabilities:
Grundartangi casthouse facility, net of financing fees of $0.6 million at September 30, 2022(4)			39.4						—
7.5% senior secured notes due April 1, 2028, net of financing fees of $3.6 million at September 30, 2022, interest payable semiannually			246.4						245.8
2.75% convertible senior notes due May 1, 2028, net of financing fees of $2.0 million at September 30, 2022, interest payable semiannually			84.3						84.0
Total			$	491.4					$	451.2

(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 IRBs interest rate at September 30, 2022 was 2.60%.

(2) We incur interest at a base rate plus applicable margin as defined within the agreement. The interest rate at September 30, 2022 was 6.75%.

(3) We incur interest at LIBOR plus applicable margin as defined within the agreement. The interest rate at September 30, 2022 was 6.62%.

(4) We incur interest at a base rate plus applicable margin as defined within the agreement. The interest rate at September 30, 2022 was 6.03%.

Schedule of line of credit facilities

Status of our U.S. revolving credit facility:			September 30, 2022
Credit facility maximum amount			$	250.0
Borrowing availability			190.3
Outstanding letters of credit issued			39.9
Outstanding borrowings			63.5
Borrowing availability, net of outstanding letters of credit and borrowings			86.9

Status of our Iceland revolving credit facility:			September 30, 2022
Credit facility maximum amount			$	100.0
Borrowing availability			100.0
Outstanding letters of credit issued			—
Outstanding borrowings			50.0
Borrowing availability, net of borrowings			50.0

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- Definition

Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation.

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- Definition

Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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