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Entity Address, State or Province Entity Address, State or Province Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Counterparty Name [Axis] Counterparty Name [Axis] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Shares used to compute earnings (loss) per share: Shares Used To Compute Earnings Loss Per Share [Abstract] Shares Used To Compute Earnings Loss Per Share. 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[Member] Oct-23 Stock option-based compensation costs Stock or Unit Option Plan Expense Common stock, no par value (authorized shares 150,000,000, issued and outstanding 34,384,677 shares at September 30, 2023 and 34,000,642 shares at December 31, 2022) Common Stock, Value, Issued Distribution [Member] Distribution [Member] Distribution [Member] Organization, Consolidation and Presentation of Financial Statements [Abstract] Reduction of right-of-use lease asset Operating Lease, Right-of-Use Asset, Periodic Reduction Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Total current assets Assets, Current Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Accounts and other receivables, net Accounts Receivable, after Allowance for Credit Loss All Individuals All Individuals [Member] Indebtedness 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Foreign Currency Forwards Foreign Currency Forwards And Options [Member] Foreign currency forwards an options member. 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Entity [Domain] Entity [Domain] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Amendment Flag Amendment Flag Legal Entity [Axis] Legal Entity [Axis] Other Nonoperating Income (Expense), Net - Other Other Nonoperating Income (Expense), Net - Other Other Nonoperating Income (Expense), Net - Other Credit Facility [Domain] Credit Facility [Domain] Debt Instrument, Basis Spread on Variable Rate Debt Instrument, Basis Spread on Variable Rate Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Long-term debt Long-Term Debt, Excluding Current Maturities Diluted (in shares) Shares used to compute diluted earnings per share Weighted Average Number of Shares Outstanding, Diluted Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Capital expenditures Payments to Acquire Property, Plant, and Equipment Company Selected Measure Amount Company Selected Measure Amount Aluminum Extrusions Subtotal [Member] Aluminum Extrusions Subtotal [Member] Aluminum Extrusions Subtotal [Member] Indebtedness To Adjusted Ebitda Ratio Greater Than Two But Less Than Or Equal To Three [Member] Indebtedness To Adjusted Ebitda Ratio Greater Than Two But Less Than Or Equal To Three [Member] Indebtedness-To-Adjusted EBITDA Ratio Greater Than Two But Less Than Or Equal To Three [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Total assets Assets Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Credit Facility covenant maximum liquidity Credit Facility covenant maximum liquidity Credit Facility covenant maximum liquidity Line of Credit, Maximum Borrowing Capacity after Modification Line of Credit, Maximum Borrowing Capacity after Modification Line of Credit, Maximum Borrowing Capacity after Modification Cover [Abstract] Commitment Under Cash Flow Hedges, Mass Commitment Under Cash Flow Hedges, Mass Commitment Under Cash Flow Hedges, Mass Trust for Savings Restoration Plan Trust For Saving Restoration Plan [Member] Trust For Saving Restoration Plan. Earnings before interest and taxes (EBIT) Earnings before interest and taxes (EBIT) Earnings before interest and taxes (EBIT) Gain (loss) on derivative financial instruments AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax Subsequent Events [Text Block] Subsequent Events [Text Block] Indebtedness To Adjusted Ebitda Ratio Greater Than One But Less Than Or Equal To Two [Member] Indebtedness To Adjusted Ebitda Ratio Greater Than One But Less Than Or Equal To Two [Member] Indebtedness-To-Adjusted EBITDA Ratio Greater Than One But Less Than Or Equal To Two [Member] UNITED STATES UNITED STATES Restructuring and Related Activities [Abstract] Other non-current liabilities Other Liabilities, Noncurrent Non-NEOs Non-NEOs [Member] Line of credit facility, covenant terms, maximum debt to EBITDA ratio Line of credit facility, covenant terms, maximum debt to EBITDA ratio Line of credit facility, covenant terms, maximum debt to EBITDA ratio Cash Flow Hedging Cash Flow Hedging [Member] Pension Benefits Pension Plan [Member] Segment Reporting Segment Reporting Disclosure [Text Block] Asset impairments and costs associated with exit and disposal activities, net of adjustments Asset Impairment And Costs Associated With Exit And Disposal Activities - impairment Line Amounts charged against earnings for incurred and estimated one-time, nonrecurring costs assoicated with asset impariments and exit and disposal activities. Increase (decrease) in cash & cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Non-PEO NEO Non-PEO NEO [Member] Equity Component [Domain] Equity Component [Domain] Adjustment to Compensation: Adjustment to Compensation [Axis] Accrued Expenses [Member] Accrued Expenses [Member] Accrued Expenses [Member] Pension and postretirement benefit plan contributions Payment for Pension and Other Postretirement Benefits Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Net gains or (losses) and prior service costs Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax Basic (in shares) Weighted average shares outstanding used to compute basic earnings per share Weighted Average Number of Shares Outstanding, Basic Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs [Table Text Block] Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs [Table Text Block] Entity Current Reporting Status Entity Current Reporting Status Revenues and other items: Revenues [Abstract] Freight Shipping and Handling [Member] Nonresidential Building And Construction [Member] Nonresidential Building And Construction [Member] Nonresidential Building And Construction [Member] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Segments [Axis] Segments [Axis] Statement [Line Items] Statement [Line Items] Other Comprehensive Income (Loss), Net of Tax [Abstract] Other Comprehensive Income (Loss), Net of Tax [Abstract] Other Comprehensive Income (Loss), Net of Tax [Abstract] Derivative, Description of Hedged Item Schedule of Derivative Instruments [Table Text Block] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Interim Period, Costs Not Allocable [Domain] Interim Period, Costs Not Allocable [Domain] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Income Tax Beneficiary [Axis] Income Tax Beneficiary [Axis] Income Tax Beneficiary [Axis] Borrowings Proceeds from Long-Term Lines of Credit Annual Net Costs Mismatch Translation Exposure - Real vs US Dollar Annual Net Costs Mismatch Translation Exposure - Real vs US Dollar Annual Net Costs Mismatch Translation Exposure - Real vs US Dollar Type of Restructuring [Domain] Type of Restructuring [Domain]