XML 139 R43.htm IDEA: XBRL DOCUMENT
v3.25.4

Long-term Debt (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2025
Debt Disclosure [Abstract] |
Schedule of Long-term Debt Instruments | The Company’s total indebtedness as of December 31, 2025 and 2024 consisted of the following:
| December 31,
Debt Instrument (defined below, as applicable) | 2025 |  | 2024
| (Dollars in millions)
3.250% Convertible Senior Notes due March 2028 (2028 Convertible Notes) | $ | 320.0 |  |  | $ | 320.0 |
BUMA Loan Note | — |  |  | 9.3 |
Finance lease obligations | 20.8 |  |  | 25.1 |
Less: Debt issuance costs | (4.4) |  |  | (6.3) |
| 336.4 |  |  | 348.1 |
Less: Current portion of long-term debt | 15.2 |  |  | 15.8 |
Long-term debt | $ | 321.2 |  |  | $ | 332.3 |
Interest Income and Interest Expense Disclosure | The following table presents the components of the Company’s interest expense related to its indebtedness and financial assurance instruments such as surety bonds and letters of credit. Additionally, the table sets forth the amount of cash paid for interest, net of capitalized interest and the amount of non-cash interest expense primarily related to the amortization of debt issuance costs.
| Year Ended December 31,
| 2025 |  | 2024 |  | 2023
| (Dollars in millions)
2028 Convertible Notes | $ | 10.4 |  |  | $ | 10.4 |  |  | $ | 10.4 |
Finance lease obligations | 1.5 |  |  | 1.8 |  |  | 1.8 |
Financial assurance instruments | 26.4 |  |  | 27.3 |  |  | 38.2 |
Amortization of debt issuance costs | 5.6 |  |  | 5.4 |  |  | 3.6 |
Receivables securitization program | 2.4 |  |  | 2.6 |  |  | 3.6 |
Capitalized interest | (8.0) |  |  | (5.8) |  |  | — |
Other | 5.6 |  |  | 5.2 |  |  | 2.2 |
Interest expense, net of capitalized interest | $ | 43.9 |  |  | $ | 46.9 |  |  | $ | 59.8 |
Cash paid for interest, net of capitalized interest | $ | 39.5 |  |  | $ | 37.6 |  |  | $ | 61.9 |
Non-cash interest expense | $ | 5.6 |  |  | $ | 5.4 |  |  | $ | 4.6 |

X
- References No definition available. + Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of interest income and expense, including, but not limited to, interest income and expense from investments, loans, and securities. + References No definition available. + Details
Name: | us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69E -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69E Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477734/942-470-50-3 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-8 Reference 11: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-6 Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-7 + Details
Name: | us-gaap_ScheduleOfDebtInstrumentsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration