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] Business Acquisition [Line Items] Business Acquisition [Line Items] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Other Identifiable Intangible Assets (Textual) [Abstract] Goodwill and Other Identifiable Intangible Assets (Textual) [Abstract] Goodwill and other identifiable intangible assets. Amortization expense on identifiable intangible assets Amortization of Intangible Assets 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] Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Domain] Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Domain] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Restricted Stock [Member] 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 Share-based Compensation 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 Weighted average period, Nonvested Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 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 Segment Reporting [Abstract] Sales and operating income data Schedule of Segment Reporting Information, by Segment [Table Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Statement of Comprehensive Income [Abstract] Net earnings Net Income (Loss) Attributable to Parent Other comprehensive earnings: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Unrealized gain (loss) on marketable securities, net of $43, $-, $35 and $(33) of tax expense (benefit), respectively Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax, Portion Attributable to Parent 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 Commitments and Contingencies Disclosure [Abstract] 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] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Company's backlog bonded by performance bonds Companies Backlog Related to Sales Companies backlog related to sales. Face value of performance bonds Debt Instrument, Face Amount Total value of letter of credit Letters of Credit Outstanding, Amount Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Purchase obligations Purchase Obligation Gross proceeds from new markets tax credit transaction Gross proceeds from new markets tax credit transaction Gross proceeds from new markets tax credit transaction Deferred costs on new market tax credit transaction Deferred costs on new market tax credit transaction Deferred costs on new market tax credit transaction Segment Information Segment Reporting Disclosure [Text Block] Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [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] Mutual Fund [Member] Mutual Fund [Member] Mutual funds [Member] Equity Funds [Member] Money Market Funds [Member] Money Market Funds [Member] Commercial Paper [Member] Commercial Paper [Member] Municipal Bonds [Member] Municipal Bonds [Member] 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) [Member] Fair Value, Inputs, Level 1 [Member] Other Observable Inputs (Level 2) [Member] 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 [Member] Municipal bonds [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, Current Available-for-sale Securities, Current Available-for-sale Securities Available-for-sale Securities Available-for-sale Securities, Noncurrent Available-for-sale Securities, Noncurrent Total assets at fair value Assets, Fair Value Disclosure Marketable Securities [Abstract] Greater Than or Equal to 12 Months, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Deferred Compensation, Share-based Payments [Member] Deferred Compensation, Share-based Payments [Member] 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 Award transactions on stock options, Weighted Average Exercise Price [Roll Forward] 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 Earnings Per Share [Abstract] Reconciliation of basic and diluted earnings per share Earnings Per Share, Basic and Diluted [Abstract] Basic earnings per share - weighted common shares outstanding Weighted Average Number of Shares Outstanding, Basic Incremental Common Shares Attributable to Share-based Payment Arrangements Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Weighted Average Number of Shares Outstanding, Diluted 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 Debt Disclosure [Abstract] Debt Debt Disclosure [Text Block] Accounting Changes and Error Corrections [Abstract] New Accounting Standards New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Compensation and Retirement Disclosure [Abstract] Components of net periodic benefit cost Schedule of Net Benefit Costs [Table Text Block] Other Liabilities Disclosure [Abstract] Other Liabilities Disclosure [Text Block] Other Liabilities Disclosure [Text Block] Future minimum rental payments under noncancelable operating leases Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Total minimum payments, Remainder of Fiscal 2017 Operating Leases, Future Minimum Payments Due, Next Twelve Months Total minimum payments, Fiscal 2018 Operating Leases, Future Minimum Payments, Due in Two Years Total minimum payments, Fiscal 2019 Operating Leases, Future Minimum Payments, Due in Three Years Total minimum payments, Fiscal 2020 Operating Leases, Future Minimum Payments, Due in Four Years Total minimum payments, Fiscal 2021 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 Schedule Of Goodwill [Table] Schedule of Goodwill [Table] Statement Business Segments [Axis] Segments [Axis] Segment [Domain] Segments [Domain] Architectural Glass [Member] Architectural [Member] Architectural. Architectural Services segment [Member] Architectural Services segment [Member] Architectural Services segment [Member] Architectural Framing Systems Segment [Member] Architectural Framing Segment [Member] Architectural Framing Segment [Member] Large-Scale Optical [Member] 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 Foreign currency translation Goodwill, Foreign Currency Translation Gain (Loss) Goodwill, Ending 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 Amortized Cost, Total Available-for-sale Debt Securities, 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 Market Value, Total Available-for-sale Securities, Debt Securities Consolidated Statement of Shareholders' Equity [Abstract] Consolidated Statement of Shareholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock [Member] Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Retained Earnings [Member] Common Stock Held In Trust [Member] Common Stock Held In Trust [Member] Common stock held in trust. Deferred Compensation Obligation [Member] Deferred Compensation Obligation [Member] Deferred compensation obligation. Accumulated Other Comprehensive Income (Loss) [Member] 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] Beginning balance (in shares) Shares, Outstanding Beginning balance Stockholders' Equity Attributable to Parent Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net Outstanding shares awards exercised Stock Issued During Period, Value, Stock Options Exercised Stock Issued During Period, Value, Stock Options Exercised Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Stock Repurchased and Retired During Period, Shares Stock Repurchased and Retired During Period, Shares Stock Repurchased and Retired During Period, Value Stock Repurchased and Retired During Period, Value Dividends, Common Stock, Cash Dividends, Common Stock, Cash Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Ending balance Ending balance (in shares) 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 Defined Benefit Plan, Net Periodic Benefit Cost Commitments and Contingent Liabilities Commitments and Contingencies Disclosure [Text Block] Segment Information [Abstract] Segment Information [Abstract] Number of Reportable Segments Number of Reportable Segments Number of Operating Segments Number of Operating Segments Goodwill and Other Identifiable Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Schedule of estimated future amortization expense for identifiable intangible assets Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Estimated amortization expense, Remainder of Fiscal 2017 Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year Estimated amortization expense, Fiscal 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Two Estimated amortization expense, Fiscal 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Three Estimated amortization expense, Fiscal 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Four Estimated amortization expense, Fiscal 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Five Deferred benefit from New Markets Tax Credit Deferred benefit from New Markets Tax Credit Deferred benefit from New Markets Tax Credit Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent Deferred Compensation Liability, Classified, Noncurrent Deferred Compensation Liability, Classified, Noncurrent Other Accrued Liabilities, Noncurrent Other Accrued Liabilities, Noncurrent Other Liabilities, Noncurrent Other Liabilities, Noncurrent Industrial Revenue Bonds [Member] Recovery Zone Facility Bonds [Member] Recovery zone facility bonds. Debt (Textual) [Abstract] Debt (Textual) [Abstract] Debt. Debt Long-term Debt Line of Credit Facility, Amount Outstanding Long-term Line of Credit Interest payments Interest Paid Earnings Per Share Earnings Per Share [Text Block] Financial assets and liabilities measured at fair value Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] 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] Marketable Securities Marketable Securities [Table Text Block] Inventory Disclosure [Abstract] Components of inventories Schedule of Inventory, Current [Table Text Block] Tax expense (benefit) on marketable securities Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Tax expense (benefit) on foreign currency hedge Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Statement of Cash Flows [Abstract] Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] Net earnings Adjustments to reconcile net earnings to net cash provided by (used in) operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Stock-based compensation Deferred income taxes Deferred Income Tax Expense (Benefit) Excess tax benefits from stock-based compensation Excess Tax Benefit from Share-based Compensation, Operating Activities 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 (used in) 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 Payments to Acquire Property, Plant, and Equipment Proceeds from sales of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment Change in restricted cash Payments to Acquire Restricted Investments 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 Investments in corporate-owned life insurance policies Payments to Acquire Life Insurance Policies Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from (Repayments of) Lines of Credit Proceeds from (Repayments of) Lines of Credit 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. Excess tax benefits from stock-based compensation Excess Tax Benefit from Share-based Compensation, Financing Activities 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 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 Carrying Value 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 Fair Value Measurements Fair Value Disclosures [Text Block] Components of inventories Inventory, Net, Items Net of Reserve Alternative [Abstract] 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 Inventory, Net Employee Benefit Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Document and Entity Information [Abstract] Abstract for Document and Entity Information Entity Registrant Name Entity Registrant Name 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 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] Reconciliation of basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Major Types Of Debt And Equity Securities [Axis] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Amortized Cost Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax Amortized Cost Available-for-sale Securities, Amortized Cost Basis Gross Unrealized Gains Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Estimated Market Value, Total Other Noncurrent Liabilities [Table Text Block] Other Noncurrent Liabilities [Table Text Block] 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] 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 Statement of Financial Position [Abstract] 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 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, Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 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, Weighted Average Grant Date Fair Value [Roll Forward] 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 Inventories Inventory Disclosure [Text Block] 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 [Member] Debt Issue Costs [Member] Debt issue costs Noncompete Agreements [Member] Noncompete Agreements [Member] Customer Relationships [Member] Customer Relationships [Member] Trademarks [Member] 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, Foreign Currency Translation Adjustment 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) Intangible Assets, Net (Excluding Goodwill) Liability for uncertain tax positions, current and noncurrent Liability for uncertain tax positions, current and noncurrent Liability for uncertain tax positions, current and noncurrent Liability for unrecognized tax benefit, expected decrease Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit Assets Assets [Abstract] Current assets Assets, Current [Abstract] Cash and cash equivalents 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 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, Debt Securities, Noncurrent Available-for-sale Securities, Debt Securities, Noncurrent Goodwill Intangible assets Other 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 Long-term self-insurance reserves Self Insurance Reserve, Noncurrent Deferred tax liabilities Deferred Tax Liabilities, Net, Noncurrent Other non-current liabilities Commitments and contingent liabilities (Note 13) 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 28,996,209 and 28,958,119, 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 Equity Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total shareholders’ equity Total liabilities and shareholders' equity Liabilities and Equity 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] Income Statement [Abstract] Net sales Revenue, Net Cost of sales Cost of Goods Sold Gross profit Gross Profit Selling, general and administrative expenses Selling, General and Administrative Expense Operating income Operating Income (Loss) Interest income Investment Income, Interest Interest expense Interest Expense Other income (expense), net Other Nonoperating Income (Expense) Earnings before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax expense (benefit) Income Tax Expense (Benefit) Net earnings Earnings per share - basic Earnings Per Share, Basic [Abstract] Net earnings Earnings Per Share, Basic Earnings per share - diluted Earnings Per Share, Diluted [Abstract] Net earnings Earnings Per Share, Diluted Weighted average basic shares outstanding Weighted average diluted shares outstanding Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Intersegment eliminations [Member] Intersegment Eliminations [Member] Corporate and other [Member] Corporate and Other [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Sales and operating income data Segment Reporting Information, Profit (Loss) [Abstract] Operating income (loss)