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v3.25.3

Business Combinations and Asset Acquisitions (Details) - USD ($) $ in Millions |  | 9 Months Ended |
--- | --- | --- | ---
May 01, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Business Combination [Line Items] |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory |  | $ 0.7 |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment |  | 1.0 |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets |  | 1.6 |  |
BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccountsPayable |  | (0.8) |  |
Goodwill, Measurement Period Adjustment |  | (0.7) |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net |  | 0.0 |  | $ 48.6
Business Combination, Pro Forma Information, Pro Forma Revenue |  |  | $ 1,185.3 |
Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax |  |  | $ (16.1) |
Augusta, Georgia Mill Acquisition [Member] |  |  |  |
Business Combination [Line Items] |  |  |  |
Business Combination, Consideration Transferred | $ 708.2 | 708.2 |  |
Business Combination, Recognized Asset Acquired, Inventory, Current | 102.8 | 103.5 |  |
Business Combination, Recognized Asset Acquired, Other Asset, Current | 0.4 | 0.4 |  |
BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOtherCurrentAsset |  | 0.1 |  |
Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment | 609.3 | 610.3 |  |
Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent | 11.8 | 11.8 |  |
Business Combination, Recognized Asset Acquired, Asset | 724.3 | 725.9 |  |
Business Combination, Recognized Liability Assumed, Long-Term Debt, Current | (0.6) | (0.6) |  |
Business Combination, Recognized Liability Assumed, Other Liability, Current | (7.7) | (8.5) |  |
Business Combination, Recognized Liability Assumed, Long-Term Debt, Noncurrent | (8.9) | (8.9) |  |
Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent | (12.6) | (12.6) |  |
Business Combination, Recognized Liability Assumed, Liability | (29.7) | (30.5) |  |
BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentTotalLiabilitiesAssumed |  | 0.8 |  |
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) | 694.5 | 695.3 |  |
BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentNetAssetsAcquired |  | 0.8 |  |
Goodwill, Measurement Period Adjustment |  | (0.8) |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net | 13.7 | 12.9 |  |
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill | $ 708.2 | $ 708.2 |  |

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