Working Capital [Abstract] Working Capital [Abstract] Inventories Schedule of Inventory, Current [Table Text Block] Other Current Liabilities Schedule of Accrued Liabilities [Table Text Block] Other non-current liabilities Other Noncurrent Liabilities [Table Text Block] Leases [Abstract] 2020 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2021 Operating Leases, Future Minimum Payments, Due in Two Years 2022 Operating Leases, Future Minimum Payments, Due in Three Years 2023 Operating Leases, Future Minimum Payments, Due in Four Years 2024 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total Operating Leases, Future Minimum Payments Due Segment Reporting [Abstract] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] United States UNITED STATES CANADA CANADA Brazil BRAZIL Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Revenues Revenues Long-Lived Assets Property, Plant and Equipment, Net Warranties Product Warranty Accrual, Current Accrued project losses Contract Liabilities, Current Contract Liabilities, Current Income and other taxes Accrual for Taxes Other than Income Taxes, Current Self Insurance Reserve, Current Self Insurance Reserve, Current Other Other Sundry Liabilities, Current Total other current liabilities Other Liabilities, Current Quarterly Financial Information Disclosure [Abstract] Gross profit Gross Profit Net earnings Net Income (Loss) Attributable to Parent Earnings per share - basic Earnings Per Share, Basic [Abstract] Earnings per share - basic (USD per share) Earnings Per Share, Basic Earnings per share - diluted Earnings Per Share, Diluted [Abstract] Earnings per share - diluted (USD per share) Earnings Per Share, Diluted Earnings Per Share [Abstract] Reconciliation of basic and diluted earnings per share Earnings Per Share, Basic and Diluted [Abstract] Basic earnings per share - weighted average common shares outstanding Weighted Average Number of Shares Outstanding, Basic Weighted average effect of nonvested share grants and assumed exercise of stock options Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Diluted earnings per share - weighted average common shares and potential common shares outstanding Weighted Average Number of Shares Outstanding, Diluted Stock awards excluded from the calculation of earnings per share because the award price was greater than the average market price of the common shares Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Deferred benefit from New Markets Tax Credit transactions Accumulated Deferred Investment Tax Credit Retirement plan obligations Liability, Defined Benefit Plan, Noncurrent Deferred compensation plan Deferred Compensation Liability, Classified, Noncurrent Other Additional Other Liabilities, Noncurrent Additional Other Liabilities, Noncurrent Total other non-current liabilities Other Accrued Liabilities, Noncurrent Share-based Payment Arrangement [Abstract] Award transactions on stock options Share-based Payment Arrangement, Option and Stock Appreciation Rights, Activity [Table Text Block] Nonvested share award transactions Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Marketable Securities [Abstract] Statement [Table] Statement [Table] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest Rate Swap [Member] Interest Rate Swap [Member] Foreign Exchange Forward Foreign Exchange Forward [Member] Statement [Line Items] Statement [Line Items] Notional value Derivative, Notional Amount Net liability Derivative, Fair Value, Net Statement of Comprehensive Income [Abstract] Net earnings Other comprehensive (loss) earnings: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Unrealized gain (loss) on marketable securities, net of $67, $17 and $(29) of tax expense (benefit), respectively Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Unrealized (loss) gain on foreign currency hedge, net of $(129), $(172) and $47 of tax (benefit) expense, respectively Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Unrealized (loss) gain on pension obligation, net of $(124), $72 and $87 of tax (benefit) expense, respectively Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Other comprehensive (loss) earnings Other Comprehensive Income (Loss), Net of Tax Total comprehensive earnings Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Retirement Benefits [Abstract] Employee Benefit Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Income Tax Disclosure [Abstract] Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] State State and Local Jurisdiction [Member] Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Income tax payments, net of refunds Income Taxes Paid, Net Effective income tax rate, change related to new tax laws Effective Income Tax Rate Reconciliation, Tax Cuts And Jobs Act Of 2017, Impact, Percent Effective Income Tax Rate Reconciliation, Tax Cuts And Jobs Act Of 2017, Impact, Percent Tax expense (benefit) Income Tax Expense (Benefit) Net operating loss carryforwards Operating Loss Carryforwards Valuation allowance of net operating loss carryforwards Operating Loss Carryforwards, Valuation Allowance Tax benefits that if recognized would decrease the effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Tax benefits that if recognized would result in adjustments to deferred taxes Unrecognized Tax Benefits that Would Result In Adjustments To Deferred Taxes Unrecognized Tax Benefits that Would Result In Adjustments To Deferred Taxes Reserve for interest and penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Decrease in total liability for unrecognized tax benefits due to audit settlements and lapsing of statutes Unrecognized Tax Benefits Reductions Resulting From Settlements With Taxing Authorities And Lapse Of Applicable Statute Of Limitations Unrecognized Tax Benefits Reductions Resulting From Settlements With Taxing Authorities And Lapse Of Applicable Statute Of Limitations Statement of Cash Flows [Abstract] Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net earnings to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Share-based compensation Share-based Payment Arrangement, Noncash Expense Deferred income taxes Deferred Income Tax Expense (Benefit) (Gain) loss on disposal of assets Gain (Loss) on Disposition of Property Plant Equipment Impairment on intangible assets Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) Proceeds from new markets tax credit transaction, net of deferred costs Proceeds from new markets tax credit transaction, net of deferred costs Proceeds from new markets tax credit transaction, net of deferred costs Noncash lease expense Operating Lease, Right-Of-Use Asset Amortization Operating Lease, Right-Of-Use Asset Amortization Other, net Other Noncash Income (Expense) Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Receivables Increase (Decrease) in Receivables Inventories Increase (Decrease) in Inventories Costs and earnings on contracts in excess of billings Increase (Decrease) in Contract with Customer, Asset Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Billings in excess of costs and earnings on uncompleted contracts Increase (Decrease) in Contract with Customer, Liability Refundable and accrued income taxes Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable Operating lease liability Increase Decrease Operating Lease Liabilities Increase Decrease in Operating Lease Liabilities during the period Other, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Capital expenditures Payments to Acquire Property, Plant, and Equipment Proceeds from sales of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment Purchases of marketable securities Payments to Acquire Debt Securities, Available-for-sale Sales/maturities of marketable securities Proceeds from Sale of Debt Securities, Available-for-sale Acquisition of business and intangibles Payments to Acquire Businesses, Net of Cash Acquired Other, net Payments for (Proceeds from) Other Investing Activities Net cash used by investing activities Net Cash Provided by (Used in) Investing Activities Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Borrowings on line of credit Proceeds from Lines of Credit Proceeds from issuance of term debt Proceeds from Term Loan Issuance Proceeds from Term Loan Issuance Payments on line of credit Repayments of Lines of Credit Repurchase and retirement of common stock Payments for Repurchase of Common Stock Dividends paid Payments of Ordinary Dividends, Common Stock Other, net Proceeds from (Payments for) Other Financing Activities Net cash (used) provided by financing activities Net Cash Provided by (Used in) Financing Activities (Decrease) increase in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Effect of exchange rates on cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash at beginning of year Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash at end of year Noncash Activity Noncash Investing and Financing Items [Abstract] Capital expenditures in accounts payable Capital Expenditures Incurred but Not yet Paid Deferred payments on acquisition of business Deferred Acquisition Payments Deferred Acquisition Payments Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Financial Instrument [Axis] Financial Instrument [Axis] Major Types Of Debt And Equity Securities [Domain] Financial Instruments [Domain] Municipal bonds Municipal Bonds [Member] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Amortized Cost, Due within one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost Amortized Cost, Due after one year through five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost Amortized Cost, Due after five years through 10 years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost Amortized Cost Debt Securities, Available-for-sale, Amortized Cost Estimated Market Value, Due within one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Estimated Market Value, Due after one year through five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value Estimated Market Value, Due after five years through 10 years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value Estimated Fair Value Debt Securities, Available-for-sale Current Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Current Federal Tax Expense (Benefit) State and local Current State and Local Tax Expense (Benefit) International Current Foreign Tax Expense (Benefit) Total current Current Income Tax Expense (Benefit) Deferred Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Deferred Federal Income Tax Expense (Benefit) State and local Deferred State and Local Income Tax Expense (Benefit) International Deferred Foreign Income Tax Expense (Benefit) Total deferred Total non-current tax (benefit) expense Other Tax Expense (Benefit) Total income tax expense Accounting Policies [Abstract] Accounting Policies [Table] Accounting Policies [Table] Accounting Policies [Table] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Recognized at shipment Transferred at Point in Time [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of Sales Cost of Sales [Member] Selling, general and administrative expenses Selling, General and Administrative Expenses [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] ASU 2016-02 Accounting Standards Update 2016-02 [Member] Scenario [Axis] Scenario [Axis] Scenario [Domain] Scenario [Domain] Scenario, Forecast Forecast [Member] Accounting Policies [Line Items] Accounting Policies [Line Items] [Line Items] for Accounting Policies [Table] Percentage of total revenue Percentage Of Total Revenue Percentage Of Total Revenue Fixed-price contracts, number of businesses Number Of Businesses Which Operate Under Long-Term, Fixed-Price Contracts Number Of Businesses Which Operate Under Long-Term, Fixed-Price Contracts Fixed-price contracts, percentage of total revenue Number Of Businesses Which Operate Under Long-Term, Fixed-Price Contracts, Percent Of Total Revenue Number Of Businesses Which Operate Under Long-Term, Fixed-Price Contracts, Percent Of Total Revenue Number of businesses Number Of Businesses Which Recognize Revenue Following The Over-Time Output Method Number Of Businesses Which Recognize Revenue Following The Over-Time Output Method Percentage of total revenue Number Of Businesses Which Recognize Revenue Following The Over-Time Output Method, Percent Of Total Revenue Number Of Businesses Which Recognize Revenue Following The Over-Time Output Method, Percent Of Total Revenue Research and development expense Research and Development Expense Advertising expense Advertising Expense Share repurchases, shares Stock Repurchased During Period, Shares Share repurchases, value Stock Repurchased During Period, Value Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Lease liability Operating Lease, Liability Term Loan Long-term Debt Fiscal 2021 Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months Fiscal 2022 Lessee, Operating Lease, Liability, Payments, Due Year Two Fiscal 2023 Lessee, Operating Lease, Liability, Payments, Due Year Three Fiscal 2024 Lessee, Operating Lease, Liability, Payments, Due Year Four Fiscal 2025 Lessee, Operating Lease, Liability, Payments, Due Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total lease payments Lessee, Operating Lease, Liability, Payments, Due Less: Amounts representing interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Present value of lease liabilities Income Statement [Abstract] Net sales Revenue from Contract with Customer, Excluding Assessed Tax Cost of sales Cost of Goods and Services Sold Gross profit Selling, general and administrative expenses Selling, General and Administrative Expense Operating income Operating Income (Loss) Interest and other expense, net Other Operating Income (Expense), Net Earnings before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax expense Net earnings Weighted average basic shares outstanding Weighted average diluted shares outstanding Schedule of Quarterly Financial Information Quarterly Financial Information [Table Text Block] Revenue from Contract with Customer [Abstract] Revenue, Receivables and Contract Assets and Liabilities Revenue from Contract with Customer [Text Block] SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Allowances for doubtful receivables SEC Schedule, 12-09, Allowance, Credit Loss [Member] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Balance at Beginning of Period SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount SEC Schedule, 12-09, Valuation Allowances and Reserves, Business Acquired SEC Schedule, 12-09, Valuation Allowances and Reserves, Business Acquired Charged to Costs and Expenses SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense Deductions from Reserves SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction Other changes add (deduct) SEC Schedule, 12-09, Valuation Allowances and Reserves, Increase (Decrease) Adjustment Balance at End of Period Net actuarial (loss) gain Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2019 Stock Incentive Plan Two Thousand and Nineteen Stock Incentive Plan [Member] Two thousand and nineteen stock incentive plan. 2019 Non-Employee Director Stock Incentive Plan Two Thousand and Nineteen Non Employee Director Stock Plan [Member] Two thousand and nineteen non employee director stock plan. Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Stock Options And Stock Appreciation Rights [Member] Stock Options And Stock Appreciation Rights [Member] Stock Options And Stock Appreciation Rights [Member] Restricted Stock Restricted Stock [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Number of shares authorized for issuance Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Award vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Share-based Payment Arrangement, Noncash Expense Number of shares, Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Weighted average period, Nonvested Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Cash proceeds from exercise of stock options Proceeds from Stock Options Exercised Aggregate intrinsic value of securities Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Total unrecognized compensation cost related to nonvested share Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Total fair value of shares vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] EFCO Corporation EFCO Corporation [Member] EFCO Corporation [Member] Business Acquisition Business Acquisition [Line Items] Ownership percentage acquired Business Acquisition, Percentage of Voting Interests Acquired Payments to acquire business Payments to Acquire Businesses, Gross Net working capital Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Working Capital Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Working Capital Net sales Business Acquisition, Pro Forma Revenue Cover [Abstract] Document Type Document Type Document Annual Report Document Annual Report Document Period End Date Document Period End Date Document Transition Report Document Transition Report Entity File Number Entity File Number Entity Registrant Name Entity Registrant Name Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Entity Address, Postal Zip Code Entity Address, Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Public Float Entity Public Float Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Central Index Key Entity Central Index Key Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Schedule of Recognized Identified Assets Acquired Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Business Acquisition, Pro Forma Information Business Acquisition, Pro Forma Information [Table Text Block] Debt Disclosure [Abstract] 2021 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2022 Long-term Debt, Maturities, Repayments of Principal in Year Two 2023 Long-term Debt, Maturities, Repayments of Principal in Year Three 2024 Long-term Debt, Maturities, Repayments of Principal in Year Four 2025 Long-term Debt, Maturities, Repayments of Principal in Year Five Thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Total long-term debt Components of net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] Interest cost Defined Benefit Plan, Interest Cost Expected return on assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Amortization of unrecognized net loss Defined Benefit Plan, Amortization of Gain (Loss) Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Commitments and Contingencies Disclosure [Abstract] Long-term Purchase Commitment [Table] Long-term Purchase Commitment [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Current Liabilities and Other Non Current Liabilities Current Liabilities And Other Non Current Liabilities [Member] Current Liabilities And Other Non Current Liabilities [Member] Long-term Purchase Commitment [Line Items] Long-term Purchase Commitment [Line Items] Face value of performance bonds Guarantees, Fair Value Disclosure Company's backlog bonded by performance bonds Companies Backlog Related to Sales Companies backlog related to sales. Project related liability Project Related Liability Project Related Liability Project Related Insurance Proceeds Insurance Recoveries Total value of letter of credit Letters of Credit Outstanding, Amount Purchase obligations Purchase Obligation Number of properties acquired with historical environmental conditions Number Of Properties Acquired With Historical Environmental Conditions Number Of Properties Acquired With Historical Environmental Conditions Reserve for environmental liabilities Accrual for Environmental Loss Contingencies Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Other Identifiable Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Supplemental Balance Sheet Information Working Capital [Text Block] Working Capital [Text Block] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Gross unrecognized tax benefits at beginning of year Unrecognized Tax Benefits Gross increases in tax positions for prior years Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Gross decreases in tax positions for prior years Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Gross increases based on tax positions related to the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Settlements Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Statute of limitations expiration Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Unrecognized Tax Benefits, Increase Resulting from Revaluation Unrecognized Tax Benefits, Increase Resulting from Revaluation Unrecognized Tax Benefits, Increase Resulting from Revaluation Gross unrecognized tax benefits at end of year Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Recognized over time Transferred over Time [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Total Basis of Consolidation Consolidation, Policy [Policy Text Block] Fiscal Year Fiscal Period, Policy [Policy Text Block] Accounting Estimates Use of Estimates, Policy [Policy Text Block] Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Marketable securities Investment [Text Block] Inventories Inventory, Policy [Policy Text Block] Property, Plant and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Goodwill and Other Intangible Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Self-Insurance Unpaid Policy Claims and Claims Adjustment Expense, Policy [Policy Text Block] Warranty Guarantees, Indemnifications and Warranties Policies [Policy Text Block] Foreign Currency Foreign Currency Transactions and Translations Policy [Policy Text Block] Derivatives and hedging activities Derivatives, Policy [Policy Text Block] Revenue Recognition Revenue [Policy Text Block] Research and Development Research and Development Expense, Policy [Policy Text Block] Advertising Advertising Cost [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Subsequent Events Subsequent Events, Policy [Policy Text Block] New Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Buildings and improvements Building and Building Improvements [Member] Machinery and equipment Machinery and Equipment [Member] Office equipment and furniture Furniture and Fixtures [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Fiscal Time Period Fiscal Time Period Fiscal Time Period Estimated useful lives Property, Plant and Equipment, Useful Life Intangible Asset Life Minimum Intangible Asset Life Minimum Intangible Asset Life Minimum Intangible Asset Life Maximum Intangible Asset Life Maximum Intangible Asset Life Maximum Performance Period For Percentage Of Completion Contracts Performance Period For Percentage Of Completion Contracts Performance Period For Percentage Of Completion Contracts Income Taxes Income Tax Disclosure [Text Block] Guarantees and warranties Movement in Extended Product Warranty Accrual [Roll Forward] Balance at beginning of period Extended Product Warranty Accrual Additional accruals Extended Product Warranty Accrual, Increase for Warranties Issued Claims paid Extended Product Warranty Accrual, Decrease for Payments Balance at end of period Equity [Abstract] Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Statement of Financial Position [Abstract] Assets Assets [Abstract] Current assets Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted Cash and Cash Equivalents, Current Receivables, net of allowance for doubtful accounts Accounts Receivable, after Allowance for Credit Loss, Current Inventories Inventory, Net Costs and earnings on contracts in excess of billings Contract with Customer, Asset, Net, Current Other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property, plant and equipment, net Goodwill Goodwill Intangible assets Intangible Assets, Net (Excluding Goodwill) Other non-current assets Other Assets, Noncurrent Total assets Assets Liabilities and Shareholders’ Equity Liabilities and Equity [Abstract] Current liabilities Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued payroll and related benefits Employee-related Liabilities, Current Billings in excess of costs and earnings on uncompleted contracts Contract with Customer, Liability, Current Operating lease liabilities Operating Lease, Liability, Current Current portion long-term debt Long-term Debt, Current Maturities Other current liabilities Total current liabilities Liabilities, Current Long-term debt Long-term Debt, Excluding Current Maturities Non-current operating lease liabilities Operating Lease, Liability, Noncurrent Non-current self-insurance reserves Self Insurance Reserve, Noncurrent Other non-current liabilities Other Liabilities, Noncurrent Commitments and contingent liabilities (Note 11) Commitments and Contingencies Shareholders’ equity Stockholders' Equity Attributable to Parent [Abstract] Common stock of $0.33-1/3 par value; authorized 50,000,000 shares; issued and outstanding 26,443,166 and 27,015,127 shares, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Retained earnings Retained Earnings (Accumulated Deficit) Common stock held in trust Common Stock Issued, Employee Stock Trust Deferred compensation obligations Deferred Compensation Liability, Current and Noncurrent Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total shareholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and shareholders’ equity Liabilities and Equity Revenue recognized related to contract liabilities at Marc 4, 2018 Contract with Customer, Liability, Revenue Recognized Revenue related to performance obligations satisfied in previous periods due to changes in contract estimates Contract with Customer, Performance Obligation Satisfied in Previous Period Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segments [Axis] Segments [Axis] Segment [Domain] Segments [Domain] Architectural Glass Architectural Glass Segment [Member] Architectural Glass Segment [Member] Architectural Services Architectural Services segment [Member] Architectural Services segment [Member] Architectural Framing Systems Architectural Framing Segment [Member] Architectural Framing Segment [Member] Large-Scale Optical Large Scale Optical Segment [Member] Large Scale Optical Segment [Member] Intersegment elimination Intersegment Eliminations [Member] Corporate and other Corporate and Other [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Operating Income (Loss) Depreciation and Amortization Capital Expenditures Identifiable Assets Interest on debt Interest Expense, Debt Other interest expense Interest Expense, Other Interest expense Interest Expense Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] Share Repurchase Program Share Repurchase Program [Member] Share Repurchase Program [Member] Stock Based Compensation Plans Share-based Payment Arrangement [Member] Class of Stock [Line Items] Class of Stock [Line Items] Junior preferred stock, shares Preferred Stock, Shares Authorized Junior preferred stock par value Preferred Stock, Par or Stated Value Per Share Increase in authorized shares under the share repurchase program Stock Repurchase Program Additional Number Of Shares Authorized To Be Repurchased Stock Repurchase Program Additional Number Of Shares Authorized To Be Repurchased Remaining shares authorized to be repurchased Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased Share-based Payment Arrangement, Decrease for Tax Withholding Obligation Share-based Payment Arrangement, Decrease for Tax Withholding Obligation Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Retained Earnings Retained Earnings [Member] Common Stock Held in Trust Common Stock Held In Trust [Member] Common stock held in trust. Deferred Compensation Obligation Deferred Compensation Obligation [Member] Deferred compensation obligation. Accumulated Other Comprehensive (Loss) Income AOCI Attributable to Parent [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance Balance, shares Shares, Outstanding Cumulative Effect of New Accounting Principle in Period of Adoption Cumulative Effect of New Accounting Principle in Period of Adoption Unrealized gain (loss) on marketable securities, net of tax Unrealized gain (loss) on foreign currency hedge, net of tax Unrealized gain (loss) on pension obligation, net of tax Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Reclassification of tax effects Tax Cuts and Jobs Act, Incomplete Accounting, Change in Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense Issuance of stock, net of cancellations Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Issuance of stock, net of cancellations, shares Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Share-based compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Share repurchases Share repurchases, shares Other share retirements Stock Redeemed or Called During Period, Value Other share retirements, shares Stock Redeemed or Called During Period, Shares Cash dividends Dividends, Common Stock, Cash Balance Balance, shares Acquisition Business Combination Disclosure [Text Block] Property, plant and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Goodwill Other intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Less: Long-term liabilities acquired, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities Net assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Change in projected benefit obligation Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Benefit obligation beginning of period Defined Benefit Plan, Benefit Obligation Actuarial loss (gain) Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Benefit obligation at measurement date Change in plan assets Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Fair value of plan assets beginning of period Defined Benefit Plan, Plan Assets, Amount Actual return on plan assets Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) Company contributions Defined Benefit Plan, Plan Assets, Contributions by Employer Fair value of plan assets at measurement date Estimated future benefit payments Defined Benefit Plan, Benefit Obligation, Benefits Paid Underfunded status Defined Benefit Plan, Funded (Unfunded) Status of Plan Net earnings Business Acquisition, Pro Forma Net Income (Loss) Basic (USD per share) Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax, Per Share, Basic Diluted (USD per share) Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax, Per Share, Diluted Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Estimated future benefit payments Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months 2022 Defined Benefit Plan, Expected Future Benefit Payment, Year Two 2023 Defined Benefit Plan, Expected Future Benefit Payment, Year Three 2024 Defined Benefit Plan, Expected Future Benefit Payment, Year Four 2025 Defined Benefit Plan, Expected Future Benefit Payment, Year Five 2026-2030 Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter Amortized cost, gross unrealized gains and losses, and estimated fair values of investments available for sale Debt Securities, Available-for-sale [Abstract] Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Estimated Fair Value Amortized cost, gross unrealized gains and losses, and estimated fair values of investments available for sale Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Schedule of amortized cost and estimated fair values of investments by contractual maturity Investments Classified by Contractual Maturity Date [Table Text Block] Schedule of financial assets and liabilities measured at fair value on a recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax Net periodic pension expense, Expected return on plan assets Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets Loss Contingencies [Table] Loss Contingencies [Table] Termination Date [Axis] Termination Date [Axis] Termination Date [Axis] Termination Date [Domain] Termination Date [Domain] [Domain] for Termination Date [Axis] November 2020 October 2020 [Member] October 2020 [Member] May 2023 May 2023 [Member] May 2023 [Member] July 2025 July 2025 [Member] July 2025 [Member] August 2025 August 2025 [Member] August 2025 [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Proceeds received Gross Proceeds From New Markets Tax Credit Transaction Gross Proceeds From New Markets Tax Credit Transaction Deferred costs Deferred Costs Net benefit New Markets Tax Credit Transaction, Benefit, Net New Markets Tax Credit Transaction, Benefit, Net Financial Instruments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Discount rate Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Guarantees and warranties Schedule of Product Warranty Liability [Table Text Block] Outstanding NMTC transactions New Market Tax Credit Transactions Summary [Table Text Block] [Table Text Block] for New Market Tax Credit Transactions Summary [Table] Options/SARs Outstanding Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised Proceeds from Stock Options Exercised Award transactions on stock options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Outstanding, Beginning Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Outstanding shares awards exercised Outstanding, Ending Award transactions on stock options, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Weighted average exercise price, Beginning Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted average exercise price, Awards exercised Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted average exercise price, Ending Weighted average remaining contractual life, Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Aggregate intrinsic value, Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate intrinsic value, Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Statutory federal income tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Tax rate change revaluation Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent Manufacturing deduction Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Percent State and local income taxes, net of federal tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Foreign tax rate differential Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Tax credits - research & development Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent Other, net Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Consolidated effective income tax rate Effective Income Tax Rate Reconciliation, Percent Disaggregated revenue data Disaggregation of Revenue [Table Text Block] Net receivables Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Contract assets and liabilities Contract with Customer, Asset and Liability [Table Text Block] Performance obligations expected to be satisfied Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Property, Plant and Equipment [Abstract] Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Stock-Based Compensation Share-based Payment Arrangement [Text Block] Summary of Significant Accounting Policies and Related Data Significant Accounting Policies [Text Block] Unrealized gain (loss) on marketable securities, tax Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax Unrealized (loss) gain on foreign currency hedge, tax Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Unrealized (loss) gain on pension obligation, tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite Lived Intangible Assets Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer relationships Customer Relationships [Member] Backlog Order or Production Backlog [Member] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Tradename Trade Names [Member] Total other intangible assets Estimated useful life (in years) Finite-Lived Intangible Asset, Useful Life Lessee, Operating Lease, Lease Not Yet Commenced, Undiscounted Amount Lessee, Operating Lease, Lease Not Yet Commenced, Undiscounted Amount Lessee, Operating Lease, Lease Not Yet Commenced, Undiscounted Amount Average daily borrowings during the year Debt Instrument Average Daily Borrowings During The Year Debt Instrument Average Daily Borrowings During The Year Maximum borrowings outstanding during the year Debt Instrument Maximum Borrowings Outstanding During The Year Debt Instrument Maximum Borrowings Outstanding During The Year Weighted average interest rate during the year Debt, Weighted Average Interest Rate Line of Credit Facility [Table] Line of Credit Facility [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Letter of Credit [Member] Letter of Credit [Member] Borrowings under revolving credit agreement Revolving Credit Facility [Member] Term Loan [Member] Term Loan [Member] Term Loan [Member] Line of Credit [Member] Line of Credit [Member] Industrial Revenue Bonds [Member] Recovery Zone Facility Bonds [Member] Recovery zone facility bonds. Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Debt (Textual) [Abstract] Debt (Textual) [Abstract] Debt. Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Amount Outstanding Long-term Line of Credit Amount of available commitment Line of Credit Facility, Remaining Borrowing Capacity Debt Interest payments Interest Paid, Including Capitalized Interest, Operating and Investing Activities Schedule of goodwill attributable to each business segment Schedule of Goodwill [Table Text Block] Schedule of finite lived intangible assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of estimated future amortization expense for identifiable intangible assets Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Contract assets Contract with Customer, Asset, after Allowance for Credit Loss Contract liabilities Contract with Customer, Liability Property, Plant and Equipment Property, Plant and Equipment Disclosure [Text Block] Other non-current assets Assets for Plan Benefits, Defined Benefit Plan Current liabilities Liability, Defined Benefit Plan, Current Other non-current liabilities Total Liability, Defined Benefit Plan Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Foreign Exchange Forward [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Quoted Prices in Active Markets (Level 1) Fair Value, Inputs, Level 1 [Member] Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Money market funds Money Market Funds, at Carrying Value Commercial paper Commercial Paper, at Carrying Value Municipal and corporate bonds Long-term Investments, Municipal And Corporate Bonds Long-term Investments, Municipal And Corporate Bonds Derivative, Fair Value, Net Schedule Of Finite Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Customer relationships Other intangibles Other Intangible Assets [Member] Trademarks Trademarks [Member] Finite Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Schedule of finite lived identifiable intangible assets Finite-Lived Intangible Assets, Net [Abstract] Gross Carrying Amount Finite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Foreign Currency Translation Finite Lived Identifiable Intangible Assets Translation Adjustments Finite lived identifiable intangible assets translation adjustments. Net Finite-Lived Intangible Assets, Net Indefinite-lived Intangible Assets (Excluding Goodwill) Indefinite-lived Intangible Assets (Excluding Goodwill) Impairment Indefinite-lived Intangible Assets, Translation Adjustments Indefinite-lived Intangible Assets, Foreign Currency Translation Gain (Loss) Indefinite-lived Intangible Assets (Excluding Goodwill), Net of translation adjustments Indefinite-lived Intangible Assets (Excluding Goodwill), Net of translation adjustments Indefinite-lived Intangible Assets (Excluding Goodwill), Net of translation adjustments Intangible Assets Gross Excluding Goodwill Intangible Assets, Gross (Excluding Goodwill) Intangible Assets Accumulated Amortization Intangible Assets Accumulated Amortization Intangible Assets Accumulated Amortization Intangible Assets Impairment Intangible Assets Impairment Intangible Assets Impairment Intangible Assets Foreign Currency Translation Intangible Assets Foreign Currency Translation Intangible Assets Foreign Currency Translation Intangible Assets, Net (Excluding Goodwill) Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Commitments and Contingent Liabilities Commitments and Contingencies Disclosure [Text Block] Earnings per Share Earnings Per Share [Text Block] Lessee, Operating Leases Lessee, Operating Leases [Text Block] Reconciliation of basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Nonvested share award transactions Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Nonvested Number, Beginning Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Number of shares, Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Number of shares, Canceled Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Nonvested Number, Ending Nonvested share award transactions, Wieghted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Weighted average grant date fair value, Beginning Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Weighted average grant date fair value, Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value, Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value, Canceled Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Weighted average grant date fair value, Ending United States Income (Loss) from Continuing Operations before Income Taxes, Domestic International Income (Loss) from Continuing Operations before Income Taxes, Foreign Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Geographic Concentration Risk Geographic Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Revenue Benchmark [Member] Revenue Benchmark [Member] Number of reportable segments Number of Reportable Segments Number of operating segments Number of Operating Segments Project related charges Project Related Charges Project Related Charges Export net sales as a percentage of consolidated net sales (percentage) Concentration Risk, Percentage Operating lease cost Operating Lease, Cost Short-term lease cost Short-term Lease, Cost Variable lease cost Variable Lease, Cost Total lease cost Lease, Cost Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Defined Contribution Plan Employer Contribution Match Level Based On Employee Contribution [Axis] Defined Contribution Plan Employer Contribution Match Level Based On Employee Contribution [Axis] Defined Contribution Plan Employer Contribution Match Level Based On Employee Contribution [Axis] Defined Contribution Plan Employer Contribution Match Level Based On Employee Contribution [Domain] Defined Contribution Plan Employer Contribution Match Level Based On Employee Contribution [Domain] [Domain] for Defined Contribution Plan Employer Contribution Match Level Based On Employee Contribution [Axis] First one percent contributed First One Percent [Member] First One Percent [Member] Two through six percent Two Through Six Percent [Member] Two Through Six Percent Other current and non-current liabilities Other Current And Other Noncurrent Liabilities [Member] Other Current And Other Noncurrent Liabilities [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Number of manufacturing facilities Number Of Manufacturing Facilities That Union Employees Are Covered With 401(k) Plan Number Of Manufacturing Facilities That Union Employees Are Covered With 401(k) Plan Percentage employees are allowed to contribute (up to 60 percent) Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Company matching contribution percentage Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Percentage of eligible compensation contributed Defined Contribution Plan, Employer Matching Contribution, Percent of Match Annual company match amount Defined Contribution Plan, Employer Contribution Amount Defined Contribution Plan, Employer Contribution Amount Investments in corporate-owned life insurance policies Life Insurance, Corporate or Bank Owned, Amount Mutual funds Mutual Fund Investments Mutual fund investments. Total contribution to multi-employer union retirement plans Multiemployer Plans, Plan Contributions Estimated amortization from accumulated other comprehensive loss into net periodic benefit cost in the next fiscal year Net periodic benefit cost Schedule of estimated future amortization expense for identifiable intangible assets Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months Estimated amortization expense, Fiscal 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Two Estimated amortization expense, Fiscal 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Three Estimated amortization expense, Fiscal 2024 Finite-Lived Intangible Assets, Amortization Expense, Year Four Estimated amortization expense, Fiscal 2025 Finite-Lived Intangible Assets, Amortization Expense, Year Five Financial Statement Schedules - Valuation and Qualifying Accounts SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Schedule of Maturities of Long-term Debt Schedule of Maturities of Long-term Debt [Table Text Block] Selected Information Related to Long-term Debt Schedule of Debt [Table Text Block] Schedule of Interest Expense Schedule Of Interest Expense [Table Text Block] Schedule Of Interest Expense [Table Text Block] Accrued expenses Deferred Tax Assets (Liabilities), Tax Deferred Expense, Reserves and Accruals, Other, Non Current Deferred Tax Assets (Liabilities), Tax Deferred Expense, Reserves and Accruals, Other, Non Current Deferred compensation Deferred Tax Assets (Liabilities), Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost, Non Current Deferred Tax Assets (Liabilities), Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost, Non Current Liability for unrecognized tax benefits Unrecognized Tax Benefits, Non Current Unrecognized Tax Benefits, Non Current Unearned income Deferred Tax Assets, Deferred Income Operating lease liabilities Deferred tax assets operating lease liabilities Deferred tax assets operating lease liabilities Net operating losses and tax credits Deferred Tax Assets, Operating Loss Carryforwards, Non Current Deferred Tax Assets, Operating Loss Carryforwards, Non Current Other Deferred Tax Assets (Liabilities), Other, Non Current Deferred Tax Assets (Liabilities), Other, Non Current Total deferred tax assets Deferred Tax Assets, Gross Less: valuation allowance Deferred Tax Assets, Valuation Allowance Deferred tax assets, net of valuation allowance Deferred Tax Assets, Net of Valuation Allowance Goodwill and other intangibles Deferred Tax Liabilities, Goodwill and Intangible Assets Depreciation Deferred Tax Liabilities, Property, Plant and Equipment Operating lease, right-of-use assets Deferred Tax Liabilities Operating Lease Assets Deferred Tax Liabilities Operating Lease Assets Total deferred tax liabilities Deferred Tax Liabilities, Gross Net deferred tax liabilities Deferred Tax Liabilities, Net Net deferred tax assets Deferred Tax Assets, Net Land Land [Member] Construction in progress Construction in Progress [Member] Total property, plant and equipment Property, Plant and Equipment, Gross Less accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Net property, plant and equipment Depreciation expense Depreciation Schedule of components of lease expense Lease, Cost [Table Text Block] Lessee, Operating Lease, Liability, Maturity [Table Text Block] Lessee, Operating Lease, Liability, Maturity [Table Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Amount Revenue, Remaining Performance Obligation, Amount Revenue, Remaining Performance Obligation, Amount Debt Debt Disclosure [Text Block] Net unrealized loss on marketable securities AOCI, Debt Securities, Available-for-sale, Adjustment, after Tax Foreign currency hedge Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax Pension liability adjustments Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax Foreign currency translation adjustments Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Total accumulated other comprehensive loss Cash dividends per share Common Stock, Dividends, Per Share, Cash Paid One Trademark One Trademark [Member] One Trademark [Member] Goodwill impairment Goodwill, Impairment Loss Carrying value Amortization of Intangible Assets Amortization of Intangible Assets Schedule of Income before Income Tax, Domestic and Foreign Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Schedule of Components of Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule of Unrecognized Tax Benefits Roll Forward Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Schedule of Defined Benefit Plans Disclosures Schedule of Defined Benefit Plans Disclosures [Table Text Block] Schedule of Amounts Recognized in Balance Sheet Schedule of Amounts Recognized in Balance Sheet [Table Text Block] Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized as Components of Net Periodic Benefit Cost Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block] Schedule of Amounts Recognized in Comprehensive Earnings Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] Schedule of Net Benefit Costs Schedule of Net Benefit Costs [Table Text Block] Schedule of Assumptions Used Defined Benefit Plan, Assumptions [Table Text Block] Schedule of Expected Benefit Payments Schedule of Expected Benefit Payments [Table Text Block] Raw materials Inventory, Raw Materials, Net of Reserves Work-in-process Inventory, Work in Process, Net of Reserves Finished goods Inventory, Finished Goods, Net of Reserves Total inventories Cash paid for amounts included in the measurement of operating lease liabilities Operating Lease, Payments Lease assets obtained in exchange for new operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Weighted-average remaining lease term - operating leases Operating Lease, Weighted Average Remaining Lease Term Weighted-average discount rate - operating leases Operating Lease, Weighted Average Discount Rate, Percent Quarterly Data (Unaudited) Quarterly Financial Information [Text Block] Schedule Of Goodwill [Table] Schedule of Goodwill [Table] Architectural Framing Systems Architectural Glass Architectural [Member] Architectural. Architectural Services Large-Scale Optical Large Scale Optical [Member] Large scale optical. Goodwill [Line Items] Goodwill [Line Items] Schedule of goodwill attributable to each business segment Goodwill [Roll Forward] Goodwill, Beginning Goodwill adjustments for purchase accounting Goodwill, Translation and Purchase Accounting Adjustments Foreign currency translation Goodwill, Foreign Currency Translation Gain (Loss) Goodwill, Ending Business Segment Data Segment Reporting Disclosure [Text Block] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Trade accounts Trade Accounts Receivable [Member] Construction contracts Accounts Receivable, Construction Contracts [Member] Accounts Receivable, Construction Contracts [Member] Contract retainage Accounts Receivable, Contract Retainage [Member] Accounts Receivable, Contract Retainage [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Total receivables Accounts Receivable, before Allowance for Credit Loss Less: allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss Receivables, net Accounts Receivable, after Allowance for Credit Loss