Debt Disclosure [Abstract] Debt Debt Disclosure [Text Block] Compensation and Retirement Disclosure [Abstract] 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 Schedule of Assumptions Used [Table Text Block] Schedule of Expected Benefit Payments Schedule of Expected Benefit Payments [Table Text Block] Income Tax Disclosure [Abstract] Accounts receivable, Current Deferred Tax Assets (Liabilities), Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts, Current Deferred Tax Assets (Liabilities), Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts, Current Accounts receivable, Noncurrent Deferred Tax Assets (Liabilities), Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts, Non Current Deferred Tax Assets (Liabilities), Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts, Non Current Other accruals, Current Deferred Tax Assets (Liabilities), Tax Deferred Expense, Reserves and Accruals, Other, Current Deferred Tax Assets (Liabilities), Tax Deferred Expense, Reserves and Accruals, Other, Current Other accruals, Noncurrent 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, Current Deferred Tax Assets (Liabilities), Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost, Current Deferred Tax Assets (Liabilities), Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost, Current Deferred compensation, Noncurrent 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 Goodwill and other intangibles, Current Deferred Tax Assets (Liabilities), Goodwill and Intangible Assets, Current Deferred Tax Assets (Liabilities), Goodwill and Intangible Assets, Current Goodwill and other intangibles, Noncurrent Deferred Tax Assets (Liabilities), Goodwill and Intangible Assets, Non Current Deferred Tax Assets (Liabilities), Goodwill and Intangible Assets, Non Current Depreciation, Current Deferred Tax Assets (Liabilities), Property, Plant and Equipment, Current Deferred Tax Assets (Liabilities), Property, Plant and Equipment, Current Depreciation, Noncurrent Deferred Tax Assets (Liabilities), Property, Plant and Equipment, Non Current Deferred Tax Assets (Liabilities), Property, Plant and Equipment, Non Current Liability for unrecognized tax benefits, Current Unrecognized Tax Benefits, Current Unrecognized Tax Benefits, Current Liability for unrecognized tax benefits, Noncurrent Unrecognized Tax Benefits, Non Current Unrecognized Tax Benefits, Non Current Net operating losses, Current Deferred Tax Assets, Operating Loss Carryforwards, Current Deferred Tax Assets, Operating Loss Carryforwards, Current Net operating losses, Noncurrent Deferred Tax Assets, Operating Loss Carryforwards, Non Current Deferred Tax Assets, Operating Loss Carryforwards, Non Current Valuation allowance on net operating losses, Current Deferred Tax Assets, Valuation Allowance, Current Valuation allowance on net operating losses, Noncurrent Deferred Tax Assets, Valuation Allowance, Noncurrent Other, Current Deferred Tax Assets (Liabilities), Other, Current Deferred Tax Assets (Liabilities), Other, Current Other, Noncurrent Deferred Tax Assets (Liabilities), Other, Non Current Deferred Tax Assets (Liabilities), Other, Non Current Deferred Tax Assets (Liabilities) Current Deferred Tax Assets (Liabilities) Current Deferred Tax Assets (Liabilities) Current Deferred Tax Assets (Liabilities), Noncurrent Deferred Tax Assets (Liabilities), Noncurrent Deferred Tax Assets (Liabilities), Noncurrent Interest on debt Interest Expense, Debt Other interest expense Interest Expense, Other Interest expense Interest Expense Income Taxes Income Tax Disclosure [Text Block] Commitments and Contingencies Disclosure [Abstract] 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 Accounting Policies [Abstract] Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Options/SARs Outstanding Stock Options And Stock Appreciation Rights [Member] Stock Options And Stock Appreciation Rights [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] 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 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Outstanding, Ending Outstanding shares exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number 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 exercise price, Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted average remaining contractual life, Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted average remaining contractual life, Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, 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 Earnings Per Share [Abstract] Earnings per Share Earnings Per Share [Text Block] 2016 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2017 Long-term Debt, Maturities, Repayments of Principal in Year Two 2018 Long-term Debt, Maturities, Repayments of Principal in Year Three 2019 Long-term Debt, Maturities, Repayments of Principal in Year Four 2020 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 Long-term Debt Goodwill and Intangible Assets Disclosure [Abstract] 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 2017 Finite-Lived Intangible Assets, Amortization Expense, Year Two Estimated amortization expense, Fiscal 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Three Estimated amortization expense, Fiscal 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Four Estimated amortization expense, Fiscal 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Five 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 options excluded from the calculation of earnings per share because the exercise price was greater than the average market price of the common shares Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Equity [Abstract] 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 Stock Compensation Plan [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 Number of shares authorized under share repurchase program Stock Repurchase Program, Number of Shares Authorized to be Repurchased 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 Share repurchases, shares Stock Repurchased During Period, Shares Share repurchases, value Stock Repurchased During Period, Value Remaining shares authorized to be repurchased Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased Adjustments Related to Tax Withholding for Share-based Compensation Adjustments Related to Tax Withholding for Share-based Compensation Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Statement of Stockholders' Equity [Abstract] Unrealized gain (loss) on marketable securities, tax Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Unrealized gain (loss) on foreign currency hedge, tax Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Unrealized gain (loss) on pension obligation, tax Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax Cash dividends per share Common Stock, Dividends, Per Share, Cash Paid Net actuarial gain Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Net of Tax Total Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax U.S. Income (Loss) from Continuing Operations before Income Taxes, Domestic International Income (Loss) from Continuing Operations before Income Taxes, Foreign Earnings before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Future minimum rental payments under noncancelable operating leases Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Total minimum payments, Fiscal 2016 Operating Leases, Future Minimum Payments Due, Next Twelve Months Total minimum payments, Fiscal 2017 Operating Leases, Future Minimum Payments, Due in Two Years Total minimum payments, Fiscal 2018 Operating Leases, Future Minimum Payments, Due in Three Years Total minimum payments, Fiscal 2019 Operating Leases, Future Minimum Payments, Due in Four Years Total minimum payments, Fiscal 2020 Operating Leases, Future Minimum Payments, Due in Five Years Total minimum payments, Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total Operating Leases, Future Minimum Payments Due 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] Sotawall Sotawall [Member] Sotawall [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] 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 Property, plant and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Goodwill Goodwill Net assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Net assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Employee Benefit Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Valuation and Qualifying Accounts [Abstract] Financial Statement Schedules - Valuation and Qualifying Accounts Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Marketable Securities [Abstract] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types Of Debt And Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Municipal bonds Municipal Bonds [Member] Mutual fund Mutual Fund [Member] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Amortized cost, gross unrealized gains and losses, and estimated fair values of investments available for sale Available-for-sale Securities [Abstract] Amortized Cost Available-for-sale Debt Securities, Amortized Cost Basis Gross Unrealized Gains Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax Estimated Fair Value Available-for-sale Securities, Debt Securities Reconciliation of basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (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 Return on Assets Segment Reporting [Abstract] Business Segment Data Segment Reporting Disclosure [Text Block] Working Capital [Abstract] Working Capital [Abstract] Receivables Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Inventories Schedule of Inventory, Current [Table Text Block] Other Current Liabilities Schedule of Accrued Liabilities [Table Text Block] Summary of Significant Accounting Policies and Related Data Significant Accounting Policies [Text Block] Document and Entity Information [Abstract] Abstract for Document and Entity Information Entity Registrant Name Entity Registrant Name Trading Symbol Trading Symbol Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date 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 Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding 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 Public Float Entity Public Float 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] Valuation and Qualifying Accounts Disclosure [Table] Valuation and Qualifying Accounts Disclosure [Table] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Allowances for doubtful receivables Allowance for Doubtful Accounts [Member] Valuation and Qualifying Accounts Disclosure [Line Items] Valuation and Qualifying Accounts Disclosure [Line Items] Movement in Valuation Allowances and Reserves [Roll Forward] Movement in Valuation Allowances and Reserves [Roll Forward] Balance at Beginning of Period Valuation Allowances and Reserves, Balance Valuation Allowances and Reserves, Reserves of Businesses Acquired Valuation Allowances and Reserves, Reserves of Businesses Acquired Charged to Costs and Expenses Valuation Allowances and Reserves, Additions for Charges to Cost and Expense Deductions from Reserves Valuation Allowances and Reserves, Deductions Other changes add (deduct) Valuation Allowances and Reserves, Additions for Adjustments Balance at End of Period Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Foreign Tax Authority Foreign Tax Authority [Member] State State and Local Jurisdiction [Member] Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Tax expense (benefit) Income Tax Expense (Benefit) Income tax payments, net of refunds Income Taxes Paid, Net Tax benefit due to adoption of ASU 2016-09 Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount Tax benefits associated with stock-based incentive plans Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Income Tax Credits and Adjustments Income Tax Credits and Adjustments Net operating loss carryforwards Operating Loss Carryforwards Valuation allowance of net operating loss carryforwards Operating Loss Carryforwards, Valuation Allowance Total liability for unrecognized tax benefits Liability for Uncertainty in Income Taxes, Noncurrent 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 Future minimum rental payments under noncancelable operating leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Guarantees and warranties Schedule of Product Warranty Liability [Table Text Block] Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [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 Short-term available for sale securities Available-for-sale Securities, Debt Securities, Current Restricted cash Restricted Cash and Cash Equivalents, Current Receivables, net of allowance for doubtful accounts Accounts Receivable, Net, Current Inventories Inventory, Net Refundable income taxes Income Taxes Receivable, Current Deferred tax assets Deferred Tax Assets, Net of Valuation Allowance, Current Other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property, plant and equipment, net Property, Plant and Equipment, Net Available for sale securities Available-for-sale Securities, Debt Securities, Noncurrent Deferred tax assets Restricted Cash and Cash Equivalents, Noncurrent 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 Accrued self-insurance reserves Self Insurance Reserve, Current Other current liabilities Other Liabilities, Current Billings in excess of costs and earnings on uncompleted contracts Billings in Excess of Cost Accrued income taxes Accrued Income Taxes, Current Total current liabilities Liabilities, Current Long-term debt Long-term Debt, Excluding Current Maturities Unrecognized tax benefits Long-term self-insurance reserves Self Insurance Reserve, Noncurrent Deferred tax liabilities Deferred Tax Liabilities, Net, 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 28,680,841 and 28,683,948 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 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 Costs and earnings in excess of billings on uncompleted contracts Costs in Excess of Billings, Current Total inventories 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 Type [Domain] Receivable [Domain] Trade accounts Trade Accounts Receivable [Member] Construction contracts Construction Contracts [Member] Contract retainage Contract Retainage [Member] Contract Retainage [Member] Other receivables Other Receivables [Member] Other Receivables [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Total receivables Accounts Receivable, Gross, Current Less allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Net receivables Other Liabilities Disclosure [Abstract] Deferred benefit from New Markets Tax Credit transactions Gross proceeds from new markets tax credits Gross proceeds from new markets tax credits Retirement plan obligations Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent Deferred compensation plan Deferred Compensation Liability, Classified, Noncurrent Deferred gain on sale leaseback arrangements Sale Leaseback Transaction, Deferred Gain, Net Other Other Accrued Liabilities, Noncurrent Total other non-current liabilities Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Statement Business 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] Net sales Revenue, Net Operating Income (Loss) Operating Income (Loss) Depreciation and Amortization Depreciation, Depletion and Amortization Capital Expenditures Payments to Acquire Property, Plant, and Equipment Identifiable Assets Amortized Cost, Due within one year Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Amortized Cost, Due after one year through five years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis Amortized Cost, Due after five years through 10 years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis Amortized Cost, Due after 10 years through 15 years Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis Estimated Market Value, Due within one year Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Estimated Market Value, Due after one year through five years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Estimated Market Value, Due after five years through 10 years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value Estimated Market Value, Due after 10 years through 15 years Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value Estimated Fair Value Award transactions on stock options Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity [Table Text Block] Nonvested share award transactions Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] 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] Net export sales Sales Revenue, Goods, Net [Member] Number of reportable segments Number of Reportable Segments Number of operating segments Number of Operating Segments Revenues Revenues Export net sales as a percentage of consolidated net sales (percentage) Concentration Risk, Percentage 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 Quarterly Financial Information Disclosure [Abstract] Quarterly Data (Unaudited) Quarterly Financial Information [Text Block] Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy [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] Eligible Item or Group for Fair Value Option [Axis] Financial Instrument [Axis] Fair Value, Option, Eligible Item or Group [Domain] Financial Instruments [Domain] Money market funds Money Market Funds [Member] Commercial paper Commercial Paper [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] Financial assets and liabilities measured at fair value Fair Value, Assets Measured on Recurring and Nonrecurring Basis, Alternative [Abstract] Cash equivalents Cash and Cash Equivalents [Abstract] Total cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Available for sale securities Total available for sale securities Available-for-sale Securities Long-term securities Investments, All Other Investments [Abstract] Total long-term securities Trading Securities Total assets at fair value Assets, Fair Value Disclosure Goodwill and Other Identifiable Intangible Assets Goodwill and Intangible Assets 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] Warranties Product Warranty Accrual, Current Taxes, other than income taxes Accrual for Taxes Other than Income Taxes, Current Other Other Sundry Liabilities, Current Total other current liabilities Federal income tax expense at statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income 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 Tax credits - 48C Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Percent Other, net Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Income tax expense Effective Income Tax Rate Reconciliation, Percent Accounting Policies [Table] Accounting Policies [Table] Accounting Policies [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [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] Accounting Policies [Line Items] Accounting Policies [Line Items] [Line Items] for Accounting Policies [Table] Reporting period monthly lag Reporting Period Monthly Lag Reporting Period Monthly Lag Fiscal time period Fiscal Time Period Fiscal Time Period Performance Period For Percentage Of Completion Contracts Performance Period For Percentage Of Completion Contracts Performance Period For Percentage Of Completion Contracts Percentage of net sales recorded on a percentage of completion basis Percentage Of Net Sales Recorded On A Percentage Of Completion Basis Percentage Of Net Sales Recorded On A Percentage Of Completion Basis Research and development expense Research and Development Expense Advertising expense Advertising Expense Other Noncurrent Liabilities Other Noncurrent Liabilities [Table Text Block] Marketable Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] 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] 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] Environmental Liability Environmental Costs, Policy [Policy Text Block] Foreign Currency Foreign Currency Transactions and Translations Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Pricing and Sales Incentives Revenue Recognition, Incentives [Policy Text Block] Shipping and Handling Shipping and Handling Cost, Policy [Policy Text Block] Research and Development Research and Development Expense, Policy [Policy Text Block] Advertising Advertising Costs, Policy [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] Financial assets and liabilities measured at fair value Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] 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] 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 Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other current and non-current liabilities Other Current And Other Noncurrent Liabilities [Member] Other Current And Other Noncurrent Liabilities [Member] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Scenario, Forecast Scenario, Forecast [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 Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost Company contributions Defined Benefit Plan, Contributions by Employer Acquisition Business Combination Disclosure [Text Block] 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 Other Non-Current Liabilities Other Liabilities Disclosure [Text Block] Statement [Table] Statement [Table] 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] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance Balance, shares Shares, Outstanding Net earnings Net Income (Loss) Attributable to Parent Unrealized gain (loss) on marketable securities, net of tax Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Unrealized gain (loss) on foreign currency hedge, net of tax Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Unrealized gain (loss) on pension obligation, net of tax Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Issuance of stock, net of cancellations Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Issuance of stock, net of cancellations, shares Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Share-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Tax benefit (deficit) associated with stock plans Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options, shares 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 Property, Plant and Equipment [Abstract] Property, Plant and Equipment Property, Plant and Equipment Disclosure [Text Block] Income Statement [Abstract] Net sales Cost of sales Cost of Goods Sold Gross profit Gross Profit Selling, general and administrative expenses Selling, General and Administrative Expense Operating income Interest income Investment Income, Interest Interest expense Other income (expense), net Other Nonoperating Income (Expense) Income tax expense Net earnings Earnings per share - basic (USD per share) Earnings Per Share, Basic Earnings per share - diluted (USD per share) Earnings Per Share, Diluted Weighted average basic shares outstanding Weighted average diluted shares outstanding Working Capital Working Capital [Text Block] Working Capital [Text Block] 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 Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2009 Stock Incentive Plan Two Thousand and Nine Stock Incentive Plan [Member] Two thousand and nine stock incentive plan. 2009 Non-Employee Director Stock Incentive Plan Two Thousand and Nine Non Employee Director Stock Incentive Plan [Member] Two thousand and nine non employee director stock incentive plan. Employee Stock Option Employee Stock Option [Member] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Restricted Stock Restricted Stock [Member] 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 Term of outstanding options and SARs Stock option and SARs term Stock option and SARs term Share-based Compensation Share-based Compensation 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 Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Cash proceeds from exercise of stock options Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options Aggregate intrinsic value of securities Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Total unrecognized compensation cost related to nonvested share Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options 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 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 length of time that available-for-sale securities were in continuous unrealized loss positions Schedule of Unrealized Loss on Investments [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 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] 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 Net sales Business Acquisition, Pro Forma Revenue 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 Commitments and Contingent Liabilities Commitments and Contingencies Disclosure [Text Block] 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 Fair Value Measurements Fair Value Disclosures [Text Block] Amortization of Intangible Assets Amortization of Intangible Assets 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] 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] Statement of Comprehensive Income [Abstract] Other comprehensive earnings (loss): Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Unrealized (loss) gain on marketable securities, net of $(45), $38 and $88 of tax (benefit) expense, respectively Unrealized loss on foreign currency hedge, net of $-, $- and $(36) of tax benefit, respectively Unrealized gain (loss) on pension obligation, net of $74, $347 and $(830) of tax expense (benefit), respectively Other comprehensive earnings (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Total comprehensive earnings Comprehensive Income (Loss), Net of Tax, Attributable to Parent Gross profit Net earnings Earnings per share - basic Earnings Per Share, Basic [Abstract] Earnings per share - diluted Earnings Per Share, Diluted [Abstract] Schedule of Quarterly Financial Information Quarterly Financial Information [Table Text Block] Estimated future benefit payments Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year 2019 Defined Benefit Plan, Expected Future Benefit Payments, Year Two 2020 Defined Benefit Plan, Expected Future Benefit Payments, Year Three 2021 Defined Benefit Plan, Expected Future Benefit Payments, Year Four 2022 Defined Benefit Plan, Expected Future Benefit Payments, Year Five 2023-2027 Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter 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 Share-based compensation Deferred income taxes Deferred Income Tax Expense (Benefit) Gain on disposal of assets Gain (Loss) on Disposition of Property Plant Equipment 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 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 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 Billing in Excess of Cost of Earnings Refundable and accrued income taxes Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable 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, Continuing Operations Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Capital expenditures Purchases of marketable securities Payments to Acquire Available-for-sale Securities, Debt Sales/maturities of marketable securities Proceeds from Sale of Available-for-sale Securities, Debt Acquisition of business and intangibles Payments to Acquire Businesses, Net of Cash Acquired Change in restricted cash Payments to Acquire Restricted Investments Other, net Payments for (Proceeds from) Other Investing Activities Net cash used in 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 (Repayments of) Lines of Credit Payments on line of credit Repayments of Lines of Credit Payments on debt, net Repayments of Long-term Debt Shares withheld for taxes, net of stock issued to employees Shares Withheld For Taxes Net Of Stock Issued To Employees The cash outflow paid by the company to cover an employee's income tax withholding obligation as part of a net-share settlement of a share-based award, net of the total cash inflow associated with the amount received from holders to acquire the entity's shares under incentive and share awards, including stock option exercises. Repurchase and retirement of common stock Payments for Repurchase of Common Stock Dividends paid Payments of Ordinary Dividends, Common Stock Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities (Decrease) increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Effect of exchange rates on cash Effect of Exchange Rate on Cash and Cash Equivalents Cash and cash equivalents at beginning of year Cash and cash equivalents at end of period Noncash Activity Noncash Investing and Financing Items [Abstract] Capital expenditures in accounts payable Capital Expenditures Incurred but Not yet Paid 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 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] Segment, 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] Long-Lived Assets Schedule Of Goodwill [Table] Schedule of Goodwill [Table] Architectural Glass Architectural [Member] Architectural. Architectural Services Architectural Framing Systems 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 acquired Goodwill, Acquired During Period Foreign currency translation Goodwill, Foreign Currency Translation Gain (Loss) Goodwill, Ending Current liabilities Pension and Other Postretirement Defined Benefit Plans, Current Liabilities Other non-current liabilities Total Pension and Other Postretirement Defined Benefit Plans, Liabilities Schedule of length of time that available-for-sale securities were in continuous unrealized loss positions Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] Less Than 12 Months, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Less Than 12 Months, Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Greater Than or Equal to 12 Months, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Greater Than or Equal to 12 Months, Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Total Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Total Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Schedule Of Finite Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] 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] Debt issue costs Debt Issue Costs [Member] Debt issue costs Non-compete agreements Noncompete Agreements [Member] Customer relationships Customer Relationships [Member] Trademarks and other intangibles 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) 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 Foreign Currency Translation Intangible Assets Foreign Currency Translation Intangible Assets Foreign Currency Translation Intangible Assets, Net (Excluding Goodwill) Net unrealized (loss) gain on marketable securities Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Pension liability adjustments Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax Foreign currency translation adjustments Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Total accumulated other comprehensive loss Components of net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] Interest cost Defined Benefit Plan, Interest Cost Expected return on assets Defined Benefit Plan, Expected Return on Plan Assets Amortization of unrecognized net loss Defined Benefit Plan, Amortization of Gains (Losses) Net periodic benefit cost Long-term Purchase Commitment [Table] Long-term Purchase Commitment [Table] 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] Total rental expense Operating Leases, Rent Expense Number of sale and leaseback agreements Number Of Sale And Leaseback Agreements Number Of Sale And Leaseback Agreements Average annual lease payment Sale Leaseback Transaction, Annual Rental Payments Company's backlog bonded by performance bonds Companies Backlog Related to Sales Companies backlog related to sales. Face value of performance bonds Guarantees, Fair Value Disclosure Total value of letter of credit Letters of Credit Outstanding, Amount Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity 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 Proceeds from new markets tax credit transaction, net of deferred costs Gross proceeds from new markets tax credit transaction Gross proceeds from new markets tax credit transaction Deferred Costs Deferred Costs 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 Gross decreases based on tax positions related to the current year Unrecognized Tax Benefits, Decrease 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 Gross unrecognized tax benefits at end of year 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, Actuarial Gain (Loss) Benefits paid Defined Benefit Plan, Benefits Paid 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, Fair Value of Plan Assets Actual return on plan assets Defined Benefit Plan, Actual Return on Plan Assets Fair value of plan assets at measurement date Underfunded status Defined Benefit Plan, Funded Status of Plan 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] Technology Technology-Based Intangible Assets [Member] Backlog Order or Production Backlog [Member] Customer relationships Finite lived intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Indefinite lived intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets Total other intangible assets Estimated useful life (in years) Finite-Lived Intangible Asset, Useful Life Payments to acquire business Cash Cash Line of credit Long-term Line of Credit Operating income Deductible portion of goodwill Deductible Portion of Goodwill, Percentage Deductible Portion of Goodwill, Percentage Amortization of intangible assets 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] 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. Revolving credit facility expiration date Line of Credit Facility, Expiration Date Line of Credit Facility, Amount Outstanding Amount of available commitment Line of Credit Facility, Remaining Borrowing Capacity Debt Interest payments Interest Paid 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