Revenue from Contract with Customer [Abstract] Revenue recognized related to contract liabilities at March 4, 2018 Contract with Customer, Liability, Revenue Recognized Revenue related to performance obligations satisfied in previous periods due to changes in contract estimates Contract with Customer, Performance Obligation Satisfied in Previous Period Transaction price associated with unsatisfied performance obligations Revenue, Remaining Performance Obligation, Amount Revenue, Remaining Performance Obligation, Amount Debt Disclosure [Abstract] Line of Credit Facility [Table] Line of Credit Facility [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Canada CANADA Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Revolving credit facility Revolving Credit Facility [Member] Industrial Revenue Bonds Recovery Zone Facility Bonds [Member] Recovery zone facility bonds. Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Letter of credit Letter of Credit [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Outstanding borrowings Long-term Line of Credit Debt Long-term Debt Interest payments Interest Paid, Including Capitalized Interest, Operating and Investing Activities 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] Estimated amortization expense, Remainder of Fiscal 2018 Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year Estimated amortization expense, Fiscal 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Two Estimated amortization expense, Fiscal 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Three Estimated amortization expense, Fiscal 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Four Estimated amortization expense, Fiscal 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Five Segment Reporting [Abstract] Segment Information Segment Reporting Disclosure [Text Block] Statement of Stockholders' Equity [Abstract] Tax expense on marketable securities Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax Tax benefit on foreign currency hedge Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Unrealized gain on marketable securities, net of tax expense Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax 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 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] Customer relationships Debt Issue Costs [Member] Debt issue costs Customer relationships Customer Relationships [Member] 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, 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 Identifiable Intangible Assets, Foreign Currency Translation Adjustments Indefinite Lived Identifiable Intangible Assets, Foreign Currency Translation Adjustments Indefinite Lived Identifiable Intangible Assets, Foreign Currency Translation Adjustments 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) Schedule Of Goodwill [Table] Schedule of Goodwill [Table] Statement Business Segments [Axis] Segments [Axis] Segment [Domain] Segments [Domain] Architectural Glass Architectural [Member] Architectural. Architectural Framing Systems Architectural Framing Segment [Member] Architectural Framing Segment [Member] Architectural Services Architectural Services segment [Member] Architectural Services segment [Member] 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 Goodwill acquired Goodwill, Acquired During Period Goodwill adjustments for purchase accounting Goodwill, Purchase Accounting Adjustments Foreign currency translation Goodwill, Foreign Currency Translation Gain (Loss) Goodwill, Ending Business Combinations [Abstract] Acquisition Business Combination Disclosure [Text Block] Commitments and Contingencies Disclosure [Abstract] Future minimum rental payments under noncancelable operating leases Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Total minimum payments, Remainder of Fiscal 2018 Operating Leases, Future Minimum Payments Due, Next Twelve Months Total minimum payments, Fiscal 2019 Operating Leases, Future Minimum Payments, Due in Two Years Total minimum payments, Fiscal 2020 Operating Leases, Future Minimum Payments, Due in Three Years Total minimum payments, Fiscal 2021 Operating Leases, Future Minimum Payments, Due in Four Years Total minimum payments, Fiscal 2022 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 Income Tax Disclosure [Abstract] 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 Commitments and Contingent Liabilities Commitments and Contingencies Disclosure [Text Block] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] EFCO Corporation EFCO Corporation [Member] EFCO Corporation [Member] Business Acquisition [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 Other intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Less: Long-term liabilities acquired, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities Net assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Trade accounts Trade Accounts Receivable [Member] Construction contracts Accounts Receivable, Construction Contracts [Member] Accounts Receivable, Construction Contracts [Member] Construction contracts - retainage Accounts Receivable, Contract Retainage [Member] Accounts Receivable, 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 Less: allowance for doubtful accounts Allowance for Doubtful Accounts Receivable Net receivables Accounts Receivable, Net Marketable Securities [Abstract] Amortized Cost Debt Securities, Available-for-sale, Amortized Cost, Fiscal Year Maturity [Abstract] Due within one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost Due after one year through five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost Due after five years through 10 years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost Due after 10 years through 15 years Available-for-sale Securities, Debt Maturities, Year Eleven Through Year Fifteen, Amortized Cost Basis Available-for-sale Securities, Debt Maturities, Year Eleven Through Year Fifteen, Amortized Cost Basis Due beyond 15 years Available-for-sale Securities, Debt Maturities, After Fifteen Years, Amortized Cost Basis Available-for-sale Securities, Debt Maturities, After Fifteen Years, Amortized Cost Basis Total Debt Securities, Available-for-sale, Amortized Cost Estimated Fair Value Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract] Due within one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Due after one year through five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value Due after five years through 10 years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value Due after 10 years through 15 years Available-for-sale Securities, Debt Maturities, Year Eleven Through Year Fifteen, Fair Value Available-for-sale Securities, Debt Maturities, Year Eleven Through Year Fifteen, Fair Value Due beyond 15 years Available-for-sale Securities, Debt Maturities, After Fifteen Years, Fair Value Available-for-sale Securities, Debt Maturities, After Fifteen Years, Fair Value Total Debt Securities, Available-for-sale Disaggregated revenue data Disaggregation of Revenue [Table Text Block] Net receivables Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Contract assets and liabilities Contract with Customer, Asset and Liability [Table Text Block] Performance obligations expected to be satisfied Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Earnings Per Share [Abstract] Reconciliation of basic and diluted earnings per share Earnings Per Share, Basic and Diluted [Abstract] Basic earnings per share – weighted average common shares outstanding Weighted Average Number of Shares Outstanding, Basic Weighted average effect of nonvested share grants and assumed exercise of stock options Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Diluted earnings per share – weighted average common shares and potential common shares outstanding Weighted Average Number of Shares Outstanding, Diluted Stock awards excluded from the calculation of earnings per share because the effect was anti-dilutive (award price greater than average market price of the shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Number of Reportable Segments Number of Reportable Segments Number of Operating Segments Number of Operating Segments Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Recognized at shipment Transferred at Point in Time [Member] Recognized over time Transferred over Time [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Total Revenue from Contract with Customer, Excluding Assessed Tax Net sales Business Acquisition, Pro Forma Revenue Net earnings Business Acquisition, Pro Forma Net Income (Loss) Earnings per share Business Acquisition, Pro Forma Information [Abstract] 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 Statement of Comprehensive Income [Abstract] Tax expense (benefit) on marketable securities Organization, Consolidation and Presentation of Financial Statements [Abstract] Impact of new accounting guidance Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Foreign Exchange Forward Foreign Exchange Forward [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Dollar notional value Derivative, Notional Amount Net liability Derivative, Fair Value, Net Income Statement [Abstract] Net sales Cost of sales Cost of Goods and Services 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 Net Income (Loss) Attributable to Parent 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 Retirement Benefits [Abstract] Employee Benefit Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Total 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] 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 Proceeds from Stock Options Exercised Aggregate intrinsic value of securities Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value 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 Document Period End Date Document Period End Date Inventory Disclosure [Abstract] Supplemental Balance Sheet Information Inventory Disclosure [Text Block] Raw materials Inventory, Raw Materials, Net of Reserves Work-in-process Inventory, Work in Process, Net of Reserves Finished goods Inventory, Finished Goods, Net of Reserves Total inventories Inventory, Net 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 Other Commitments [Axis] Other Commitments [Axis] Other Commitments [Domain] Other Commitments [Domain] New Markets Tax Credit New Markets Tax Credit [Member] New Markets Tax Credit [Member] Other non-current liabilities Other Liabilities, Noncurrent Other assets Other Assets, Noncurrent Purchase obligations Purchase Obligation Deferred benefit from New Market Tax Credit transactions Accumulated Deferred Investment Tax Credit Retirement plan obligations Liability, Defined Benefit Plan, Noncurrent Deferred compensation plan Deferred Compensation Liability, Classified, Noncurrent Other Additional Other Liabilities, Noncurrent Additional Other Liabilities, Noncurrent Total other non-current liabilities Other Accrued Liabilities, Noncurrent 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 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] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer relationships Backlog Backlog [Member] Backlog [Member] Estimated useful life (in years) Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Debt Debt Disclosure [Text Block] Income Taxes Income Tax Disclosure [Text Block] 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] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Municipal and Corporate Bonds Municipal and Corporate Bonds [Member] Municipal and Corporate Bonds [Member] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Amortized Cost 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 Fair Value Reconciliation of basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Components of inventories Schedule of Inventory, Current [Table Text Block] Other current liabilities Other Current Liabilities [Table Text Block] Other non-current liabilities Other Noncurrent Liabilities [Table Text Block] Percentage of voting interests acquired Business Acquisition, Percentage of Voting Interests Acquired Debt payment to acquire business Debt payment to acquire business Debt payment to acquire business Payable installment Debt Instrument, Periodic Payment Payment period Debt Instrument, Term Sales Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Operating income Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Financial Instruments Marketable Securities [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] 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 Contract assets Contract with Customer, Asset, Net Contract liabilities Contract with Customer, Liability Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Intersegment eliminations Intersegment Eliminations [Member] Corporate and other 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] Net sales Operating income (loss) Components of net periodic benefit cost Schedule of Net Benefit Costs [Table Text Block] Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] 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) 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 Costs and earnings on contracts in excess of billings Increase (Decrease) in Cost in Excess of Billing on Uncompleted Contract 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 Acquisition of business, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Purchases of marketable securities Payments to Acquire Debt Securities, Available-for-sale Sales/maturities of marketable securities Proceeds from Sale of Debt Securities, Available-for-sale Other Payments for (Proceeds from) Other Investing Activities 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] Borrowings on line of credit Proceeds from (Repayments of) Lines of Credit Payments on line of credit 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 Proceeds from (Payments for) Other Financing Activities Proceeds from (Payments for) Other Financing Activities 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, cash equivalents and restricted cash at beginning of year Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash at end of period Noncash Activity Noncash Investing and Financing Items [Abstract] Capital expenditures in accounts payable Capital Expenditures Incurred but Not yet Paid Earnings Per Share Earnings Per Share [Text Block] Sales and operating income data Schedule of Segment Reporting Information, by Segment [Table Text Block] New Accounting Pronouncement, Early Adoption [Axis] New Accounting Pronouncement, Early Adoption [Axis] New Accounting Principles, Early Adoption [Domain] New Accounting Principles, Early Adoption [Domain] New Accounting Pronouncement, Early Adoption, Effect New Accounting Pronouncement, Early Adoption, Effect [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] AOCI AOCI Attributable to Parent [Member] Retained earnings Retained Earnings [Member] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Difference between Revenue Guidance in Effect before and after Topic 606 Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Accounting Standards Update 2018-02 Accounting Standards Update 2018-02 [Member] Accounting Standards Update 2018-02 [Member] Recognized at the time products are shipped Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Percentage of total revenue Percentage Of Total Revenue Percentage Of Total Revenue Number of businesses which operate under long-term, fixed-price contracts Number Of Businesses Which Operate Under Long-Term, Fixed-Price Contracts Number Of Businesses Which Operate Under Long-Term, Fixed-Price Contracts Revenue from businesses which operate under long-term, fixed-price contracts (as a percent) Number Of Businesses Which Operate Under Long-Term, Fixed-Price Contracts, Percent Of Total Revenue Number Of Businesses Which Operate Under Long-Term, Fixed-Price Contracts, Percent Of Total Revenue Number of businesses which changed revenue recognition practices due to the adoption of the new guidance Number Of Businesses Which Changed Revenue Recognition Practices Due To New Accounting Pronouncement Number Of Businesses Which Changed Revenue Recognition Practices Due To New Accounting Pronouncement Number of businesses that recognize revenue following an over-time output method Number Of Businesses Which Recognize Revenue Following The Over-Time Output Method Number Of Businesses Which Recognize Revenue Following The Over-Time Output Method Revenue from businesses that recognize revenue following an over-time output method (as a percent) Number Of Businesses Which Recognize Revenue Following The Over-Time Output Method, Percent Of Total Revenue Number Of Businesses Which Recognize Revenue Following The Over-Time Output Method, Percent Of Total Revenue Increase to retained earnings Retained Earnings (Accumulated Deficit) Reclassification of tax effects (see Note 1) Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense Number of shares repurchased during period (in shares) Stock Repurchased During Period, Shares Value of shares repurchased during period Stock Repurchased During Period, Value 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 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 Emerging Growth Company Entity Emerging Growth Company Entity Small Business Entity Small Business Goodwill and Other Identifiable Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] 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] Fair value measurements Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Restatement [Axis] Restatement [Axis] Restatement [Domain] Restatement [Domain] Without adoption of ASC 606 Previously Reported [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Selling, general and administrative expenses Income tax expense Inventories Costs and earnings on contracts in excess of billings Costs in Excess of Billings Billings on contracts in excess of costs and earnings Billings in Excess of Cost Other current liabilities Other Liabilities, Current Retained earnings Share-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Number of defined-benefit pension plans Number Of Defined Benefit Pension Plans Number Of Defined Benefit Pension Plans Components of net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] Interest cost Defined Benefit Plan, Interest Cost Expected return on assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Amortization of unrecognized net loss Defined Benefit Plan, Amortization of Gain (Loss) Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Assets Assets [Abstract] Current assets Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Receivables, net of allowance for doubtful accounts Accounts Receivable, Net, Current Inventories Refundable income taxes Other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property, plant and equipment, net Property, Plant and Equipment, Net Restricted cash Restricted Cash and Cash Equivalents, Noncurrent Goodwill Intangible assets Other assets 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 Billings in excess of costs and earnings on uncompleted contracts Total current liabilities Liabilities, Current Long-term debt Long-term Debt, Excluding Current Maturities Long-term self-insurance reserves Self Insurance Reserve, 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 Common stock held in trust Common Stock Issued, Employee Stock Trust Deferred compensation obligations Compensation and Benefits Trust 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 Warranties Product Warranty Accrual, Current Acquired contract liabilities Acquired Contract Liabilities, Current Acquired Contract Liabilities, Current Deferred revenue Deferred Revenue, Current Other Additional Other Liabilities, Current Additional Other Liabilities, Current Total other current liabilities Statement [Table] Statement [Table] Common Stock [Member] Common Stock [Member] Additional Paid-in Capital [Member] Additional Paid-in Capital [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] 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 Cumulative effect adjustment (see Note 1) Cumulative Effect of New Accounting Principle in Period of Adoption Reclassification of tax effects (see Note 1) Net earnings Unrealized gain (loss) on foreign currency hedge, net of $10, $-, ($99) and $- of tax expense (benefit), respectively Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives 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 Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures 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 Outstanding shares awards exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Stock Issued During Period, Value, Stock Options Exercised Stock Issued During Period, Value, Stock Options Exercised Share repurchases (in shares) Stock Redeemed or Called During Period, Shares Share repurchases Stock Redeemed or Called During Period, Value 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 Ending balance (in shares) Ending balance Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Quoted Prices in Active Markets (Level 1) Fair Value, Inputs, Level 1 [Member] Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Money market funds Money Market Funds, at Carrying Value Municipal and corporate bonds Short-term Investments, Municipal And Corporate Bonds Short-term Investments, Municipal And Corporate Bonds Commercial paper Commercial Paper, at Carrying Value Total cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Municipal and corporate bonds Long-term Investments, Municipal And Corporate Bonds Long-term Investments, Municipal And Corporate Bonds Total assets at fair value Assets, Fair Value Disclosure 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 Acquired reserves Extended Product Warranty Accrual, Additions from Business Acquisition Balance at end of period 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] 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 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 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] 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 Other comprehensive earnings: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Unrealized loss on marketable securities, net of $16, $78, $25 and $28 of tax benefit, respectively 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 Revenue, Receivables and Contract Assets and Liabilities Revenue from Contract with Customer [Text Block]