Stock repurchase program authorized amount Stock Repurchase Program, Authorized Amount Number of operating leases Number of Operating Leases Number of Operating Leases Customer [Domain] Customer [Domain] Work-in-process Inventory, Work in Process, Gross Convertible Notes Convertible Debt [Member] Accounts receivable Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net Net income (loss) Net income (loss) available to common shareholders Net Income (Loss) Attributable to Parent Right-of-use assets Operating Lease, Right-of-Use Asset Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Accrued salaries and wages Employee-related Liabilities, Current Income Statement Location [Axis] Income Statement Location [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Work-in-process Disposal Group, Including Discontinued Operation, Inventory, Works-In-Process, Current Disposal Group, Including Discontinued Operation, Inventory, Works-In-Process, Current Business combination, acquisition costs Business Combination, Acquisition Related Costs Other accrued liabilities Disposal Group, Including Discontinued Operation, Other Liabilities, Current Denominator: Denominator [Abstract] -- None. No documentation exists for this element. -- Security Exchange Name Security Exchange Name Disposal group, including discontinued operation, consideration Disposal Group, Including Discontinued Operation, Consideration Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Proceeds from sale or insurance settlements of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment Revenue from Contract with Customer [Abstract] Accrued expenses Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Accrued Liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Accrued Liabilities Capital in excess of par value Additional Paid in Capital, Common Stock Other accrued liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other Weighted-average remaining lease term - operating leases (years) Operating Lease, Weighted Average Remaining Lease Term 2025 Lessee, Operating Lease, Liability And Finance Lease, Liability, Payments, Due Year Two Lessee, Operating Lease, Liability And Finance Lease, Liability, Payments, Due Year Two Segments [Axis] Segments [Axis] 2024 Lessee, Operating Lease, Liability And Finance Lease, Liability, Payments, Due Year One Lessee, Operating Lease, Liability And Finance Lease, Liability, Payments, Due Year One Retirement Benefits [Abstract] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Entity File Number Entity File Number Earnings per common share from consolidated operations: Schedule of Earnings Per Share Basic and Diluted [Abstract] -- None. No documentation exists for this element. -- Customer deposits Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Contract With Customer, Liability, Customer Deposits Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Contract With Customer, Liability, Customer Deposits Discontinued Operations Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Deferred tax liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Intangibles and other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Convertible notes (shares) Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities Weighted-average discount rate - operating leases Operating Lease, Weighted Average Discount Rate, Percent Antidilutive securities excluded from computation of earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Cost of sales Disposal Group, Including Discontinued Operation, Costs of Goods Sold International International [Member] International [Member] Subsequent Events [Abstract] Subsequent Events [Abstract] Total Lessee, Operating Lease, Liability And Finance Lease, Liability Lessee, Operating Lease, Liability And Finance Lease, Liability Operating income of acquiree since acquisition date Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Business Combination and Asset Acquisition [Abstract] Business Acquisition [Axis] Business Acquisition [Axis] Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Disposal Group Name [Axis] Disposal Group Name [Axis] Operations and assets by segment Operations and Assets by Segment [Abstract] Operations and assets by segment. Local Phone Number Local Phone Number Credit Facility [Domain] Credit Facility [Domain] Assets Assets [Abstract] Lease liabilities obtained from new ROU assets - financing Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Goodwill Disposal Group, Including Discontinued Operation, Goodwill, Noncurrent Series A Convertible Preferred Stock, $1 par, shares authorized 240; 240 shares issued and outstanding at August 31, 2022 and 0 shares issued and outstanding at February 28, 2022 Preferred Stock, Value, Issued Cash dividends paid Dividends, Cash Retained Earnings Retained Earnings [Member] Debt Instrument [Axis] Debt Instrument [Axis] Prepaid expenses and other Increase (Decrease) in Prepaid Expense and Other Assets Term Loan B Term Loan B [Member] Term Loan B Accrued salaries and wages Disposal Group, Including Discontinued Operation, Accrued Liabilities Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Issuance of Series A convertible preferred stock in exchange for convertible debt Stock Issued During Period, Value, Conversion of Convertible Securities Total lease payments Lessee, Operating Lease, Liability And Finance Lease, Liability, Payments, Due Lessee, Operating Lease, Liability And Finance Lease, Liability, Payments, Due Deferred tax asset Disposal Group, Including Discontinued Operation, Deferred Tax Assets Repurchase and retirement of treasury shares Stock Repurchased and Retired During Period, Value Customer deposits Contract With Customer, Liability, Customer Deposits, Current Contract With Customer, Liability, Customer Deposits, Current Long-lived Assets by Geographic Areas Long-lived Assets by Geographic Areas [Table Text Block] Accounts receivable Increase (Decrease) in Accounts Receivable Income tax (benefit) expense Discontinued Operation, Tax Effect of Discontinued Operation Inventories Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Business Acquisition, Pro Forma Information Business Acquisition, Pro Forma Information [Table Text Block] Other long-term liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Commitments and Contingencies Disclosure [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Operating and financing cash flows from financing leases included in lease liabilities Finance Lease, Principal Payments Numerator for diluted earnings per share continuing operations Net Income (Loss) Attributable to Parent, Diluted Goodwill, expected deductible amount (as a percent) Business Acquisition, Goodwill, Expected Tax Deductible Amount, Percent Business Acquisition, Goodwill, Expected Tax Deductible Amount, Percent Number of operating segments Number of Operating Segments Fixed interest rate on swap agreement Derivative, Fixed Interest Rate Loss on disposal of business Gain (Loss) on Disposition of Business Basic earnings per share (usd per share) Basic earnings per common share (usd per share) Earnings Per Share, Basic Net cash used in investing activities of continuing operations Net Cash Provided by (Used in) Investing Activities, Continuing Operations 2026 Lessee, Operating Lease, Liability, to be Paid, Year Three Customer deposits Disposal Group, Including Discontinued Operation, Deferred Revenue, Current Sales Revenue from Contract with Customer [Text Block] Unamortized debt issuance costs Unamortized Debt Issuance Expense Canada CANADA Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Raw material Inventory, Raw Materials, Gross Net cash provided by investing activities from discontinued operations Cash Provided by (Used in) Investing Activities, Discontinued Operations Total net leverage ratio Debt Instrument, Total Net Leverage Ratio Maximum Debt Instrument, Total Net Leverage Ratio Maximum Lease liabilities obtained from new ROU assets - operating Operating Lease, Payments Preferred stock, conversion percentage (as a percent) Preferred Stock, Dividend Rate, Percentage Dividends on preferred stock Convertible Preferred Dividends, Net of Tax Accordion feature Line Of Credit Facility, Additional Borrowing Capacity Line Of Credit Facility, Additional Borrowing Capacity Business combination, consideration transferred Business Combination, Consideration Transferred Bad debt expense Accounts Receivable, Credit Loss Expense (Reversal) Accounts payable Disposal Group, Including Discontinued Operation, Accounts Payable, Current AZZ Infrastructure Solutions AZZ Infrastructure Solutions [Member] AZZ Infrastructure Solutions Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Total debt, gross Long-term Debt, Gross Other (income) expense, net Disposal Group, Including Discontinued Operation, Other (Income) Expense, Net Disposal Group, Including Discontinued Operation, Other (Income) Expense, Net Finished goods Disposal Group, Including Discontinued Operation, Inventory, Finished Goods, Current Disposal Group, Including Discontinued Operation, Inventory, Finished Goods, Current Income tax benefit Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation Diluted earnings per share (usd per share) Income (Loss) from Continuing Operations, Per Diluted Share Plan Name [Axis] Plan Name [Axis] Total debt, net Long-term Debt Swing Line Loan Swing Line Loan [Member] Swing Line Loan Cash Flows Used For Investing Activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Environmental liability Environmental Liability Environmental Liability Income Tax Disclosure [Abstract] Entity Small Business Entity Small Business Operating Leases Lessee, Operating Lease, Liability, Payment, Due [Abstract] Base Rate Base Rate [Member] Contract liabilities Disposal Group, Including Discontinued Operation, Contract Liability Disposal Group, Including Discontinued Operation, Contract Liability Total liabilities and shareholders' equity Liabilities and Equity Electrical/Utility Electrical and Utility Industry [Member] Electrical and Utility Industry Diluted earnings (loss) per share (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Amount of shares of common stock available for conversion (in shares) Preferred Stock, Convertible, Shares Issuable Liabilities and Shareholders’ Equity Liabilities and Equity [Abstract] Accounts payable Increase (Decrease) in Accounts Payable Interest Rate Swap Interest Rate Swap [Member] Repurchase of common stock, value Treasury Stock, Value, Acquired, Cost Method Earnings Per Share Earnings Per Share [Text Block] Total assets of discontinued operations Disposal Group, Including Discontinued Operation, Assets Shares repurchased, average price per share (in usd per share) Treasury Stock Acquired, Average Cost Per Share Entity Interactive Data Current Entity Interactive Data Current Less: Impairment of carrying amount of net assets held for sale to estimated sales price Impairment of Carrying Amount of Net Assets Held For Sales To Estimated Sales Price Impairment of Carrying Amount of Net Assets Held For Sales To Estimated Sales Price Minimum Minimum [Member] 2020 Senior Notes 2020 Senior Notes [Member] 2020 Senior Notes Nonrecurring Adjustment [Domain] Nonrecurring Adjustment [Domain] The Company and Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Reconciliation of Assets from Segment to Consolidated Reconciliation of Assets from Segment to Consolidated [Table Text Block] Gross margin Gross Profit Preferred stock, conversion threshold, shares (in shares) Preferred Stock, Conversion, Minimum Conversion Threshold, Shares Preferred Stock, Conversion, Minimum Conversion Threshold, Shares 2025 Lessee, Operating Lease, Liability, to be Paid, Year Two Effect of exchange rate changes on cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Contract assets Disposal Group, Including Discontinued Operation, Contract Assets Disposal Group, Including Discontinued Operation, Contract Assets Selling, general and administrative Selling, General and Administrative Expense Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Address, State or Province Entity Address, State or Province Operating income (loss) from discontinued operations Disposal Group, Including Discontinued Operation, Operating Income (Loss) Deferred tax assets Deferred Income Tax Assets, Net Precoat Metals Business Division Precoat Metals Business Division [Member] Precoat Metals Business Division Current liabilities: Liabilities, Current [Abstract] Contract assets Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Contract With Customer, Asset, After Allowance For Credit Loss Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Contract With Customer, Asset, After Allowance For Credit Loss Net cash used in financing activities from discontinued operations Cash Provided by (Used in) Financing Activities, Discontinued Operations Acquisition of subsidiaries, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Nonrecurring Adjustment [Axis] Nonrecurring Adjustment [Axis] Metal Coatings Metal Coatings [Member] Metal Coatings [Member] Consumer Consumer Industry [Member] Consumer Industry Common stock issued under stock-based plans and related income tax expense Stock Issued During Period, Value, Restricted Stock Award, Gross Earnings per common share from continuing operations Earnings Per Share, Continuing Operations [Abstract] Earnings Per Share, Continuing Operations Line of Credit Line of Credit [Member] Income tax payable Disposal Group, Including Discontinued Operation, Income Tax Payable (Receivable), Current Disposal Group, Including Discontinued Operation, Income Tax Payable (Receivable), Current Senior Notes Senior Notes [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] 2023 Lessee, Operating Lease, Liability And Finance Lease, Liability, Payments, Remainder Of Fiscal Year Lessee, Operating Lease, Liability And Finance Lease, Liability, Payments, Remainder Of Fiscal Year Total Operating Lease, Liability Document Transition Report Document Transition Report Common stock, $1 par, shares authorized 100,000; 24,862 shares issued and outstanding at August 31, 2022 and 24,688 shares issued and outstanding at February 28, 2022 Common Stock, Value, Issued Weighted-average discount rate - financing leases Finance Lease, Weighted Average Discount Rate, Percent Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Inventories: Inventory, Net [Abstract] Total liabilities of discontinued operations Disposal Group, Including Discontinued Operation, Liabilities The Company and Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Commitments and contingencies Commitments and Contingencies Subsequent Event [Table] Subsequent Event [Table] Leases Lessee, Operating Leases [Text Block] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Emerging Growth Company Entity Emerging Growth Company Class of Treasury Stock [Table] Class of Treasury Stock [Table] Accounts receivable, allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current 2023 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Acquisitions Business Combination Disclosure [Text Block] Transportation Transportation Industry [Member] Transportation Industry Interest sold on definitive agreement Discontinued Operation, Ownership Interest Disposed Discontinued Operation, Ownership Interest Disposed Environmental liability, current Environmental Liability, Current Environmental Liability, Current Payments of debt financing costs Payments of Debt Issuance Costs Lease liability, short-term Disposal Group, Including Discontinued Operation, Lease Liability, Current Disposal Group, Including Discontinued Operation, Lease Liability, Current Disposal Group Classification [Axis] Disposal Group Classification [Axis] Cover [Abstract] Employee and director stock awards (shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Revenue from External Customers by Geographic Areas Revenue from External Customers by Geographic Areas [Table Text Block] Class of Stock [Axis] Class of Stock [Axis] Net income from continuing operations Business Acquisition, Pro Forma Net Income (Loss) Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Net cash provided by operating activities from discontinued operations Cash Provided by (Used in) Operating Activities, Discontinued Operations Selling, general and administrative Selling, General and Administrative Expenses [Member] Cash dividends declared per common share (usd per share) Common Stock, Dividends, Per Share, Declared Sales Revenues Revenue from Contract with Customer, Excluding Assessed Tax Less imputed interest Finance Lease, Liability, Undiscounted Excess Amount Purchase of property, plant and equipment Purchase of Property, Plant and Equipment, Discontinued Operations Purchase of Property, Plant and Equipment, Discontinued Operations Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract] Payments of dividends Payments of Dividends Current liabilities of discontinued operations: Disposal Group, Including Discontinued Operation, Liabilities, Current [Abstract] Equity [Abstract] Consolidation Items [Domain] Consolidation Items [Domain] Document Quarterly Report Document Quarterly Report Costs and Expenses Operating Costs and Expenses [Abstract] Common Stock Common Stock [Member] Variable Rate [Axis] Variable Rate [Axis] Weighted-average remaining lease term - financing leases (years) Finance Lease, Weighted Average Remaining Lease Term Segments Segment Reporting Disclosure [Text Block] Operating income from continuing operations Operating income: Operating Income (Loss) Long-term assets of discontinued operations: Disposal Group, Including Discontinued Operation, Assets, Noncurrent [Abstract] Accrued dividends on preferred stock Accrued Dividends Accrued Dividends Lease liability, short-term Operating Lease, Liability, Current Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Document Fiscal Year Focus Document Fiscal Year Focus Income (loss) from discontinued operations before income tax Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax Assets held for sale Assets Held-for-sale, Not Part of Disposal Group Share-based compensation expense Share-based Payment Arrangement, Noncash Expense Variable Rate [Domain] Variable Rate [Domain] Capital in Excess of Par Value Additional Paid-in Capital [Member] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Cash provided by discontinued operations Net Cash Provided by (Used in) Discontinued Operations Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Revenue of acquiree since acquisition date Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Cash paid for income taxes Income Taxes Paid Proceeds from revolving loan Proceeds from Lines of Credit Notional amount on swap agreement Derivative, Notional Amount Other (income) expense, net Other Nonoperating Income (Expense) Other accrued liabilities and income taxes payable Increase (Decrease) in Other Operating Liabilities Repurchase and retirement of treasury shares (shares) Stock Repurchased and Retired During Period, Shares Purchase of property, plant and equipment Payments to Acquire Property, Plant, and Equipment Other accrued liabilities Other Liabilities, Current Maximum Maximum [Member] Accrued dividends on preferred stock Plus: dividends on Preferred Stock Dividends on preferred stock Preferred Stock Dividends, Income Statement Impact Property, plant and equipment Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Noncurrent Total liabilities Liabilities Accrued dividends on Series A Preferred Stock Dividends Accrued But Not Yet Paid Dividends Accrued But Not Yet Paid Cash Flows From Financing Activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Lessee, Operating Lease, Liability, Maturity Lessee, Operating Lease, Liability, Maturity [Table Text Block] Consolidation Items [Axis] Consolidation Items [Axis] Proceeds funded by committed debt financing Proceeds Funded By Committed Debt Financing Proceeds Funded By Committed Debt Financing Total shareholders’ equity Balance Balance Stockholders' Equity Attributable to Parent Common stock, shares issued (in shares) Common Stock, Shares, Issued Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued City Area Code City Area Code Prepaid expenses and other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Entity Address, City or Town Entity Address, City or Town Issuance of preferred stock in exchange for convertible notes Debt Conversion, Converted Instrument, Amount Income tax (benefit) expense Discontinued Operation, Tax Effect of Income (Loss) from Discontinued Operation During Phase-out Period After-tax interest expense for Convertible Notes Interest on Convertible Debt, Net of Tax Repurchase and retirement of treasury stock Payments for Repurchase of Common Stock Eurodollar Eurodollar [Member] Shareholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Impairment of long-lived assets Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Lease liability, long-term Operating Lease, Liability, Noncurrent Total lease payments Finance Lease, Liability, Payment, Due Debt instrument, face amount Debt Instrument, Face Amount Interest expense Interest Expense 2024 Finance Lease, Liability, to be Paid, Year One Debt Instrument, Interest Rate, Effective Percentage Debt Instrument, Interest Rate, Effective Percentage Number of finance leases Number of Finance Leases Number of Finance Leases Discontinued Operations and Disposal Groups [Abstract] Total Purchase Price, net of cash acquired Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Retained earnings Retained Earnings (Accumulated Deficit) Operating Segments Operating Segments [Member] Schedule of Recognized Identified Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Common stock issued under employee stock purchase plan (shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Entity Filer Category Entity Filer Category Total Finance Lease, Liability Business Acquisition [Line Items] Business Acquisition [Line Items] Income Statement [Abstract] Income Statement [Abstract] Entity Registrant Name Entity Registrant Name Prepaid expenses and other Prepaid Expense and Other Assets Accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Payments on revolving loan Repayments of Lines of Credit 2026 Finance Lease, Liability, to be Paid, Year Three 2027 Finance Lease, Liability, to be Paid, Year Four Preferred stock, conversion price (in dollars per share) Preferred Stock, Convertible, Conversion Price 2025 Finance Lease, Liability, to be Paid, Year Two Common stock issued under stock-based plans and related income tax expense (shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Income tax expense Income Tax Expense (Benefit) Accounts receivable (net of allowance for credit losses of $5,801 as of August 31, 2022 and $4,716 as of February 28, 2022) Accounts Receivable, after Allowance for Credit Loss, Current Amendment Flag Amendment Flag Statement of Stockholders' Equity - test [Abstract] Statement of Stockholders' Equity - test [Abstract] Statement of Stockholders' Equity - test [Abstract] Proceeds from long term debt Proceeds from Issuance of Long-term Debt Equity Components [Axis] Equity Components [Axis] Selling, general and administrative Disposal Group, Including Discontinued Operation, General and Administrative Expense Entity Tax Identification Number Entity Tax Identification Number Document Fiscal Period Focus Document Fiscal Period Focus Total current assets Assets, Current Total lease payments Lessee, Operating Lease, Liability, to be Paid Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Lease liability, long-term Disposal Group, Including Discontinued Operation, Lease Liability, Noncurrent Disposal Group, Including Discontinued Operation, Lease Liability, Noncurrent Debt due within one year Debt due within one year Long-term Debt, Current Maturities Gross margin Disposal Group, Including Discontinued Operation, Gross Profit (Loss) Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Equity Component [Domain] Equity Component [Domain] Lease liability, long-term Lease Liability, Noncurrent Lease Liability, Noncurrent Lease liability, short-term Lease Liability, Current Lease Liability, Current 2024 Lessee, Operating Lease, Liability, to be Paid, Year One Discontinued Operations, Disposed of by Sale Discontinued Operations, Disposed of by Sale [Member] Unrealized translation loss Foreign currency translation Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Disposal Group Name [Domain] Disposal Group Name [Domain] Current assets of discontinued operations: Disposal Group, Including Discontinued Operation, Assets, Current [Abstract] DAAM Galvanizing Co. Ltd. DAAM Galvanizing Co. Ltd. [Member] DAAM Galvanizing Co. Ltd. Statement [Line Items] Statement [Line Items] Income from discontinued operations, net of tax Income from discontinued operations, net of tax Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax Share-based compensation Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture 2027 Lessee, Operating Lease, Liability, to be Paid, Year Four Debt Disclosure [Abstract] Debt Disclosure [Abstract] Finance lease liabilities ― ST Finance Lease, Liability, Current Income from continuing operations before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Liabilities held for sale Liabilities held for sale Disposal Group, Including Discontinued Operation, Liabilities, Current Corporate Corporate, Non-Segment [Member] Segment Reporting [Abstract] Segment Reporting [Abstract] Less imputed interest Lessee, Operating Lease, Liability And Finance Lease, Liability, Undiscounted Excess Amount Lessee, Operating Lease, Liability And Finance Lease, Liability, Undiscounted Excess Amount Sales Disposal Group, Including Discontinued Operation, Revenue Earnings per common share from discontinued operations: Earnings Per Share, Discontinued Operations [Abstract] Earnings Per Share, Discontinued Operations Customer [Axis] Customer [Axis] Net cash provided by (used in) financing activities of continuing operations Net Cash Provided by (Used in) Financing Activities, Continuing Operations Computation of basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Finance Leases Finance Lease, Liability, Payment, Due [Abstract] Title of 12(b) Security Title of 12(b) Security Prepaid expenses and other Disposal Group, Including Discontinued Operation, Prepaid and Other Assets, Current Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Total assets Total assets: Assets Plan Name [Domain] Plan Name [Domain] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Geographical [Domain] Geographical [Domain] Numerator for diluted earnings per share consolidated net income (loss) available to common shareholders Net Income (Loss) Available to Common Stockholders, Diluted Repayments of secured debt Repayments of Secured Debt Net income (loss) available to common shareholders Net income (loss) available to common shareholders Net Income (Loss) Available to Common Stockholders, Basic Document Type Document Type Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Interest rate stated percentage Debt Instrument, Interest Rate, Stated Percentage Estimated loss on discontinued operations, net of tax Estimated loss on discontinued operations, net of tax Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax Derivative Contract [Domain] Derivative Contract [Domain] Standby And Commercial Letters Of Credit Standby And Commercial Letters Of Credit [Member] Standby And Commercial Letters Of Credit Revolving Credit Facility Revolving Credit Facility [Member] Schedule of Debt Schedule of Debt [Table Text Block] Lease, Cost Lease, Cost [Table Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Subsequent Event [Line Items] Subsequent Event [Line Items] Geographical [Axis] Geographical [Axis] Lease liability, long-term Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Noncurrent Liabilities, Operating Lease, Liability Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Noncurrent Liabilities, Operating Lease, Liability Denominator for basic earnings per common share-weighted average shares (shares) Weighted Average Number of Shares Outstanding, Basic Diluted earnings per share (usd per share) Diluted earnings per common share (usd per share) Earnings Per Share, Diluted Segments [Domain] Segments [Domain] Repayments of long-term lines of credit Repayments of Long-term Lines of Credit Equity method investment, ownership solution Discontinued Operation, Equity Method Investment Retained after Disposal, Ownership Interest after Disposal Net income from continuing operations available to common shareholders Net Income (Loss) from Continuing Operations Available to Common Shareholders, Basic Total fair value of assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Right-of-use asset Disposal Group, Including Discontinued Operation, Right of Use Asset, Noncurrent Disposal Group, Including Discontinued Operation, Right of Use Asset, Noncurrent Subsequent Events Subsequent Events [Text Block] Converted instrument, rate Debt Conversion, Converted Instrument, Rate Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Intangibles and other assets, net Intangible Assets, Net (Excluding Goodwill) Accounts payable and other accrued liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Accounts Payable And Other Accrued Liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Accounts Payable And Other Accrued Liabilities Cost of sales Cost of Revenue Net change in contract assets and liabilities Increase (Decrease) in Contract with Customer, Asset And Liability, Net Increase (Decrease) in Contract with Customer, Asset And Liability, Net Contract liabilities Contract liabilities Contract with Customer, Liability Other comprehensive income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Thereafter Lessee, Operating Lease, Liability And Finance Lease, Liability, Payments, Due After Year Four Lessee, Operating Lease, Liability And Finance Lease, Liability, Payments, Due After Year Four Deferred income taxes Deferred Income Tax Liabilities, Net Loans Payable Loans Payable [Member] Construction Construction Industry [Member] Construction Industry Issuance of Series A convertible preferred stock in exchange for convertible debt, shares (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Property, plant and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Basic earnings per share (usd per share) Income (Loss) from Continuing Operations, Per Basic Share Accounts payable Accounts Payable, Current Other Other Industry [Member] Other Industry Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Inventories Increase (Decrease) in Inventories Series A convertible preferred stock (shares) Incremental Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock Contract assets Contract assets Contract with Customer, Asset, after Allowance for Credit Loss Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Accrued dividends Dividends Payable Accounts payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Revenues [Abstract] Revenues [Abstract] Long-term liabilities of discontinued operations: Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent [Abstract] Document Period End Date Document Period End Date Proceeds from divestiture of businesses Proceeds from Divestiture of Businesses Entity Central Index Key Entity Central Index Key Total lease expense Lease, Cost Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement Location [Domain] Income Statement Location [Domain] Supplemental disclosures of non-cash investing and financing activities Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Property, plant and equipment, net Property, Plant and Equipment, Net Other long-term liabilities Other Liabilities, Noncurrent Repurchase of common stock (in shares) Treasury Stock, Shares, Acquired Debt Instrument [Line Items] Debt Instrument [Line Items] Payments on long term debt Repayments of Long-term Debt Trading Symbol Trading Symbol Earnings per common share from consolidated operations Earnings Per Share [Abstract] Earnings Per Share [Abstract] Revenue Business Acquisition, Pro Forma Revenue Other assets Increase (Decrease) in Other Operating Assets Fair Value Adjustment to Inventories, Property, Plant and Equipment, Goodwill and Intangibles and Other Assets Fair Value Adjustment to Inventories, Property, Plant and Equipment, Goodwill and Intangibles and Other Assets [Member] Fair Value Adjustment to Inventories, Property, Plant and Equipment, Goodwill and Intangibles and Other Assets Loss on disposal Estimated non-cash loss on disposal of discontinued operations Estimated loss on disposal of discontinued operations Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax Numerator: Numerator [Abstract] -- None. No documentation exists for this element. -- Finished goods Inventory, Finished Goods, Gross Defined Benefit Pension Plan Defined Benefit Plan [Text Block] Industrial Industrial Industry [Member] Industrial Industry Basic earnings (loss) per share (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Debt due after one year, net Total debt due after one year, net Long-term Debt, Excluding Current Maturities Precoat Metals Precoat Metals [Member] Precoat Metals Effective income tax rate, discontinuing operations (percent) Effective Income Tax Rate Reconciliation, Discontinued Operations, Percent Effective Income Tax Rate Reconciliation, Discontinued Operations, Percent Entity Current Reporting Status Entity Current Reporting Status Effective income tax rate, continuing operations (percent) Effective Income Tax Rate Reconciliation, Percent Amount of shares of common stock available for conversion (in shares) Convertible Preferred Stock, Shares Issued upon Conversion Series A Preferred Stock Series A Preferred Stock [Member] 2021 Credit Agreement 2021 Credit Agreement [Member] 2021 Credit Agreement Amortization of deferred borrowing costs Amortization of Debt Issuance Costs 2027 Lessee, Operating Lease, Liability And Finance Lease, Liability, Payments, Due Year Four Lessee, Operating Lease, Liability And Finance Lease, Liability, Payments, Due Year Four Total fair value of liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Net (gain) loss on sale of property, plant and equipment Gain (Loss) on Disposition of Property Plant Equipment Cash and cash equivalents from continuing operations at end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Balance (shares) Balance (shares) Shares, Issued United States UNITED STATES Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Current assets: Assets, Current [Abstract] Leases [Abstract] Leases [Abstract] Cash and cash equivalents Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents Right-of-use asset Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Operating Lease, Right-Of-Use Asset Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Operating Lease, Right-Of-Use Asset Raw materials Disposal Group, Including Discontinued Operation, Inventory, Raw Materials, Current Disposal Group, Including Discontinued Operation, Inventory, Raw Materials, Current Disposal Group Classification [Domain] Disposal Group Classification [Domain] Net income (loss) from discontinued operations Net income (loss) from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Entity Address, Postal Zip Code Entity Address, Postal Zip Code Denominator for diluted earnings per common share (shares) Weighted Average Number of Shares Outstanding, Diluted Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax Intangibles and other Disposal Group, Including Discontinued Operation, Intangible Assets, Noncurrent Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract] Income Taxes Income Tax Disclosure [Text Block] Total long-term liabilities of discontinued operations Total long-term liabilities of discontinued operations Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent Total non-current assets of discontinued operations Total non-current assets of discontinued operations Disposal Group, Including Discontinued Operation, Assets, Noncurrent Repayments for working capital purposes Payments For Working Capital Purposes Payments For Working Capital Purposes Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Equity Stockholders' Equity Note Disclosure [Text Block] Disposal Groups, Including Discontinued Operations Disposal Groups, Including Discontinued Operations [Table Text Block] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Credit Facility [Axis] Credit Facility [Axis] Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Effects of changes in assets and liabilities, net of acquisitions and dispositions: Increase (Decrease) in Operating Capital [Abstract] Common stock issued under employee stock purchase plan Stock Issued During Period, Value, Employee Stock Purchase Plan Cash Flows From Operating Activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Entity Shell Company Entity Shell Company Thereafter Finance Lease, Liability, To Be Paid, After Year Four Finance Lease, Liability, To Be Paid, After Year Four Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] Total current liabilities Liabilities, Current Payments for taxes related to net share settlement of equity awards Payment, Tax Withholding, Share-based Payment Arrangement Class of Stock [Domain] Class of Stock [Domain] Interest expense Disposal Group, Including Discontinued Operation, Interest Expense Lease liability, short-term Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Operating Lease, Liability, Current Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Operating Lease, Liability, Current Thereafter Lessee, Operating Lease, Liability, To Be Paid, After Year Four Lessee, Operating Lease, Liability, To Be Paid, After Year Four Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity 2022 Credit Agreement And Term Loan B 2022 Credit Agreement And Term Loan B [Member] 2022 Credit Agreement And Term Loan B Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Less: Cash and cash equivalents from discontinued operations at end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations Current Fiscal Year End Date Current Fiscal Year End Date Net cash provided by operating activities of continuing operations Net Cash Provided by (Used in) Operating Activities, Continuing Operations 2020 Share Repurchase Program 2020 Share Repurchase Program [Member] 2020 Share Repurchase Program Earnings per common share from discontinued operations: Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share [Abstract] Current assets of discontinued operations Assets held for sale Disposal Group, Including Discontinued Operation, Assets, Current 2023 Finance Lease, Liability, to be Paid, Remainder of Fiscal Year Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Statement [Table] Statement [Table] Accumulated benefit obligation in excess of plan assets Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation Recently Adopted Accounting Pronouncements And Recently Issued Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] 2026 Lessee, Operating Lease, Liability And Finance Lease, Liability, Payments, Due Year Three Lessee, Operating Lease, Liability And Finance Lease, Liability, Payments, Due Year Three Effect of dilutive securities: Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Statistical Measurement [Axis] Statistical Measurement [Axis] Subsequent Event Subsequent Event [Member] Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Amortization and depreciation Depreciation and Amortization, Discontinued Operations Finance lease liabilities ― LT Finance Lease, Liability, Noncurrent Income (loss) from discontinued operations before income tax Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Preferred Stock Preferred Stock [Member] Goodwill Goodwill Cost of sales Cost of Sales [Member] Net income from continuing operations Net income from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Income tax payable Accrued Income Taxes, Current Adjustments to reconcile net income from continuing operations to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Operating cash flows from operating leases included in lease liabilities Operating Lease, Cost Line of credit facility, interest rate Line of Credit Facility, Interest Rate During Period Debt Long-term Debt [Text Block] Deferred income taxes Deferred Income Tax Expense (Benefit) Aggregate principal payment Debt Instrument, Periodic Payment