Real estate property (in sqft) Area of Real Estate Property Goodwill [Line Items] Goodwill [Line Items] Long-Term Debt, Less Current Portion Total long-term debt, net of debt issuance costs - term loans Long-term Debt Contract liabilities Increase (Decrease) in Contract with Customer, Liability Revision of Prior Period [Axis] Revision of Prior Period [Axis] Percentage of excess cash flow payment when leverage ratio is greater than 3.25 Debt Instrument, Percentage of Excess Cash Flow Payment When Leverage Ratio is Greater than 3.25 Debt Instrument, Percentage of Excess Cash Flow Payment When Leverage Ratio is Greater than 3.25 Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Service cost Defined Benefit Plan, Service Cost City Area Code City Area Code Payables and Accruals [Abstract] Payables and Accruals [Abstract] Customer relationships Customer Relationships [Member] Cost of Sales Cost of Goods and Services Sold Net non-current deferred tax liability Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities 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] Segments [Axis] Segments [Axis] Equity Components [Axis] Equity Components [Axis] Change in unrealized gains and losses on cash flow hedges, net of tax of zero and $29 for the three months ended September 26, 2020 and September 28, 2019, respectively, and $57 and $2 for the nine months ended September 26, 2020 and September 28, 2019, respectively Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Title of 12(b) Security Title of 12(b) Security Employee Benefit Plans Retirement Benefits [Text Block] Finished goods Inventory, Finished Goods, Net of Reserves Accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Minimum Minimum [Member] Purchase price allocation refinements Goodwill, Purchase Accounting Adjustments Total assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Operating lease liabilities Operating Lease, Liability, Current Fees paid to lenders to be capitalized Debt Issuance Costs, Gross Schedule of Supplemental Cash Flow Information Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Statistical Measurement [Domain] Statistical Measurement [Domain] Liabilities and Shareholders’ Equity Liabilities and Equity [Abstract] Revolving credit facility Line of Credit [Member] Deferred Income Taxes Deferred Income Tax Liabilities, Net Periodic payment Debt Instrument, Periodic Payment Percentage of fair value in excess of carrying amount Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount Current Fiscal Year End Date Current Fiscal Year End Date Cash Flows from Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] Intangibles, Net Intangible Assets, Net (Excluding Goodwill) West Covina, California Location Two [Member] Location 2 [Member] Commitment fee Line of Credit Facility, Commitment Fee Percentage Trade names and trademarks Trademarks and Trade Names [Member] Operating Income Operating Income Operating Income (Loss) Entity Address, Postal Zip Code Entity Address, Postal Zip Code Cumulative Effect, Period of Adoption, Adjustment Cumulative Effect, Period of Adoption, Adjustment [Member] Total Current Liabilities Liabilities, Current Additional paid-in capital Additional Paid in Capital, Common Stock Business Acquisition [Line Items] Business Acquisition [Line Items] Contract with Customer, Asset and Liability Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Variable Rate [Domain] Variable Rate [Domain] Variable Rate [Axis] Variable Rate [Axis] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Commitments and Contingencies (Notes 8, 10) Commitments and Contingencies Assets Assets [Abstract] Less debt issuance costs - term loans Debt Issuance Costs, Net Accounting Policies [Abstract] Accounting Policies [Abstract] Number of reportable segments Number of Reportable Segments Stock Awards Vested Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Net periodic pension cost Pension and Other Postretirement Benefits Cost (Reversal of Cost) Entity Shell Company Entity Shell Company Decrease in unrecognized tax benefits in next twelve months Decrease in Unrecognized Tax Benefits is Reasonably Possible Cover [Abstract] Accounts payable Accounts Payable, Current Prepayment amount of principal outstanding Debt Instrument, Prepayment Amount, Percentage of Principal Amount Debt Instrument, Prepayment Amount, Percentage of Principal Amount Document Type Document Type Accrued and Other Liabilities Accounts Payable and Accrued Liabilities Disclosure [Text Block] Consolidation Items [Axis] Consolidation Items [Axis] Retained earnings Retained Earnings (Accumulated Deficit) Repayments of lines of credit Repayments of Lines of Credit Operating Lease Right-of-Use Assets Operating Lease, Right-of-Use Asset Accounts receivable, net (allowance for credit losses of $1,423 and $1,321 at September 26, 2020 and December 31, 2019, respectively Accounts Receivable, after Allowance for Credit Loss, Current Common Stock Including Additional Paid in Capital Common Stock Including Additional Paid in Capital [Member] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Taxes paid Income Taxes Paid Property and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Carrying value of impaired assets Impaired Assets to be Disposed of by Method Other than Sale, Carrying Value of Asset Credit Facilities Credit Facilities [Member] Credit Facilities [Member] Goodwill Goodwill Balance at December 31, 2019 Balance at September 26, 2020 Goodwill Other Comprehensive Income, Net of Tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Document Quarterly Report Document Quarterly Report Raw materials and supplies Inventory, Raw Materials and Supplies, Net of Reserves Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Other non-current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Other Long-Term Liabilities Other Liabilities, Noncurrent Deferred Income Taxes Deferred Income Tax Assets, Net Payments made for interest rate hedge Payments for Hedge, Financing Activities Work in process Inventory, Work in Process, Net of Reserves Debt amount Debt Instrument, Face Amount Stock-Based Compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition Debt issuance costs, line of credit arrangements Debt Issuance Costs, Line of Credit Arrangements, Net Capital Expenditures Capital Expenditures Capital Expenditures Other current assets Other Assets, Current Segment Reconciling Items Segment Reconciling Items [Member] Inventories Total Inventory, Net Schedule of Goodwill Schedule of Goodwill [Table Text Block] Weighted-average number of common shares outstanding Weighted Average Number Of Share Outstanding [Abstract] Weighted Average Number Of Share Outstanding [Abstract] Net Revenues Revenue Revenue from Contract with Customer, Excluding Assessed Tax Asset Class [Domain] Asset Class [Domain] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Accrued compensation Accrued Compensation Current Accrued Compensation, Current Non-cash activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Entity Central Index Key Entity Central Index Key Entity File Number Entity File Number Business Acquisition [Axis] Business Acquisition [Axis] Geographical [Domain] Geographical [Domain] Contract liabilities Contract with Customer, Liability, Current Entity Emerging Growth Company Entity Emerging Growth Company Accounting Standards Update [Extensible List] Accounting Standards Update [Extensible List] Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Axis] Tax benefit Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax Statement [Line Items] Statement [Line Items] Credit Facility [Domain] Credit Facility [Domain] Derivative Contract [Domain] Derivative Contract [Domain] Diluted (in shares) Diluted weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding Excluded from Computation of Diluted Earnings Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Basic earnings per share (in dollars per share) Basic (in dollars per share) Earnings Per Share, Basic Weighted-average interest rate (percent) Long-term Debt, Weighted Average Interest Rate, at Point in Time Expected change in unrecognized tax benefits Unrecognized Tax Benefits that Would Impact Effective Tax Rate Document Fiscal Period Focus Document Fiscal Period Focus Debt Disclosure [Abstract] Debt Disclosure [Abstract] Acquisition related costs Business Combination, Acquisition Related Costs Statement [Table] Statement [Table] Interest cost Defined Benefit Plan, Interest Cost Percentage of excess cash flow payment when leverage ratio is less than or equal to 2.50 Debt Instrument, Percentage of Excess Cash Flow Payment When Leverage Ratio is Less Than or Equal to 2.50 Debt Instrument, Percentage of Excess Cash Flow Payment When Leverage Ratio is Less Than or Equal to 2.50 Statistical Measurement [Axis] Statistical Measurement [Axis] Credit Facility [Axis] Credit Facility [Axis] Deferred income taxes Deferred Income Taxes and Tax Credits Other current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other Net Cash Provided by (Used in) Financing Activities Net Cash Provided by (Used in) Financing Activities Net cash paid upon issuance of common stock under stock plans Payments From Issuance of Stock Under Award Plans, Net Payments From Issuance of Stock Under Award Plans, Net Repayments of senior secured revolving credit facility Repayments of Long-term Lines of Credit Remaining performance obligation Revenue, Remaining Performance Obligation, Amount Weighted Average Number of Shares Outstanding Used to Compute Earnings Per Share Schedule of Weighted Average Number of Shares [Table Text Block] Unrecognized tax benefits Unrecognized Tax Benefits Employee Stock Purchase Plan Stock Issued During Period, Value, Employee Stock Purchase Plan Business Combinations [Abstract] Business Combinations [Abstract] Common stock - $0.01 par value; 35,000,000 shares authorized; 11,714,590 and 11,572,668 shares issued and outstanding at September 26, 2020 and December 31, 2019, respectively Common Stock, Value, Issued Loss contingency, receivable, proceeds Loss Contingency, Receivable, Proceeds Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Current portion of long-term debt Long-term Debt, Current Maturities Insurance recoveries related to property and equipment Proceeds from Insurance Settlement, Investing Activities Retirement Benefits [Abstract] Retirement Benefits [Abstract] Total Goodwill and Intangibles Intangible Assets, Net (Including Goodwill) Goodwill [Roll Forward] Goodwill [Roll Forward] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Weighted-Average Number of Common Shares Outstanding Weighted Average Number of Shares Outstanding, Diluted [Abstract] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Contract assets Increase (Decrease) in Contract with Customer, Asset Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Other Income Other Income Corporate Administration Corporate, Non-Segment [Member] Cash Flows from Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Common stock, shares issued (in shares) Common Stock, Shares, Issued Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Amendment Flag Amendment Flag Other Other Accrued Liabilities, Current Eurodollar Rate Eurodollar [Member] Repayments of debt Repayments of Debt Inventories Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Fair Value Fair Value Measurement, Policy [Policy Text Block] Net Cash Provided by Operating Activities Net Cash Provided by (Used in) Operating Activities Total long-term debt, less current portion Long-term Debt, Excluding Current Maturities Segment Reporting [Abstract] Segment Reporting [Abstract] Amortization of actuarial loss and prior service costs, net of tax of $59 and $51 for the three months ended September 26, 2020 and September 28, 2019, respectively, and $177 and $154 for the nine months ended September 26, 2020 and September 28, 2019, respectively Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax Accounts receivable Increase (Decrease) in Accounts Receivable Debt Instrument [Line Items] Debt Instrument [Line Items] Derivative Instrument [Axis] Derivative Instrument [Axis] Military and space Military and Space [Member] Military and Space [Member] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Total Shareholders’ Equity Beginning Balance Ending Balance Stockholders' Equity Attributable to Parent Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Total Liabilities and Shareholders’ Equity Liabilities and Equity Loss Contingencies [Line Items] Loss Contingencies [Line Items] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Income Taxes Income Tax Disclosure [Text Block] Purchases of property and equipment not paid Capital Expenditures Incurred but Not yet Paid Derivatives Instruments Derivatives, Policy [Policy Text Block] Change in unrealized gains and losses on cash flow hedges, tax benefit Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax Geographical [Axis] Geographical [Axis] Local Phone Number Local Phone Number Total liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Purchase price allocation, fair value Total purchase price allocation Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Corporate General and Administrative Expenses General and Administrative Expense Segments [Domain] Segments [Domain] Percentage of excess cash flow payment when leverage ratio is less than or equal to 3.25 but greater than 2.50 Debt Instrument, Percentage Of Excess Cash Flow Payment When Leverage Ratio Is Less Than Or Equal to 3.25 But Greater Than 2.50 Debt Instrument, Percentage Of Excess Cash Flow Payment When Leverage Ratio Is Less Than Or Equal to 3.25 But Greater Than 2.50 Potentially dilutive stock options and stock units to purchase common stock (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Other Other Noncash Income (Expense) Dilutive potential common shares (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Useful life (in years) Finite-Lived Intangible Asset, Useful Life Equity Component [Domain] Equity Component [Domain] Accounts receivable, allowance for credit loss Accounts Receivable, Allowance for Credit Loss, Current Entity Address, Address Line One Entity Address, Address Line One Gross Profit Gross Profit Cash Flows from Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Property and equipment, net of accumulated depreciation of $169,292 and $162,920 at September 26, 2020 and December 31, 2019, respectively Property, Plant and Equipment, Net Selling, General and Administrative Expenses Selling, General and Administrative Expense Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Net Income Net Income Net income Net Income (Loss) Attributable to Parent Entity Address, State or Province Entity Address, State or Province Changes in Assets and Liabilities: Increase (Decrease) in Operating Capital [Abstract] Entity Current Reporting Status Entity Current Reporting Status Other Assets Other Assets, Noncurrent LIBOR London Interbank Offered Rate (LIBOR) [Member] Inventories Inventory Disclosure [Text Block] Other Comprehensive Income, Net of Tax Other Comprehensive Income, Net of Tax Other Comprehensive Income (Loss), Net of Tax Non-cash operating lease cost Right-Of-Use Asset, Amortization Right-Of-Use Asset, Amortization Business Segment Information Segment Reporting Disclosure [Text Block] Total Assets Total Assets Assets Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Total Current Assets Assets, Current Damage from Facility Fire Damage from Fire, Explosion or Other Hazard [Member] Goodwill Goodwill Disclosure [Text Block] Earnings Per Share Earnings per share Earnings Per Share [Abstract] Restructuring Charges Restructuring charges Restructuring Charges Post closing cash received from the acquisition of Nobles Worldwide, Inc., net Proceeds from previous acquisition Proceeds from Previous Acquisition Summary of Accrued Liabilities Schedule of Accrued Liabilities [Table Text Block] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Production cost of contracts Production Cost Of Contracts Current Costs incurred for certain long-term contracts that require machinery or tools to build the parts as specified within the contract. These costs include production and tooling costs. The production contract costs are recorded to costs of sales using the units of delivery method. Stock options and stock units Stock Options And Restricted Stock Units [Member] Stock Options And Restricted Stock Units [Member] Entity Small Business Entity Small Business Shareholders’ Equity Stockholders' Equity Attributable to Parent [Abstract] Number of buildings Loss Contingency, Number Of Buildings Affected Loss Contingency, Number Of Buildings Affected Commercial aerospace Commercial Aerospace [Member] Commercial Aerospace [Member] Entity Interactive Data Current Entity Interactive Data Current Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Net of tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax Depreciation and Amortization Expenses Depreciation, Depletion and Amortization Entity Filer Category Entity Filer Category Cash Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Product and Service [Axis] Product and Service [Axis] Total Liabilities Liabilities Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Disclosure of Guarantees and Indemnifications [Abstract] Disclosure of Guarantees and Indemnifications [Abstract] Disclosure of Guarantees and Indemnifications [Abstract] Entity Address, City or Town Entity Address, City or Town Provision for Estimated Losses on Contracts Contingent Liability Reserve Estimate, Policy [Policy Text Block] Supplemental Disclosures of Cash Flow Information Supplemental Cash Flow Information [Abstract] New Revolving Credit Facility Due December 20, 2024 New Revolving Credit Facility Due December 20, 2024 [Member] New Revolving Credit Facility Due December 20, 2024 Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Possible loss Loss Contingency, Estimate of Possible Loss Product and Service [Domain] Product and Service [Domain] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Inventories Increase (Decrease) in Inventories Document Fiscal Year Focus Document Fiscal Year Focus Accounts payable Increase (Decrease) in Accounts Payable Secured Debt Secured Debt [Member] Remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Debt Instrument [Axis] Debt Instrument [Axis] Interest Expense Interest Income (Expense), Net Revision of Prior Period [Domain] Revision of Prior Period [Domain] Schedule of Business Acquisitions, by Acquisition Schedule of Business Acquisitions, by Acquisition [Table Text Block] Remaining performance obligation, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Provision for (recovery of) credit losses Accounts Receivable, Credit Loss Expense (Reversal) Operating Segments Operating Segments [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Property and equipment, accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Contract assets Contract with Customer, Asset, after Allowance for Credit Loss, Current Asset Class [Axis] Asset Class [Axis] Facility Fire In Guaymas, Mexico Guaymas, Mexico [Member] Guaymas, Mexico Operating lease liabilities Increase (Decrease) In Operating Lease Liability Increase (Decrease) In Operating Lease Liability Net Increase (Decrease) in Cash and Cash Equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Number of subsidiaries that are not guarantors on debt Number of Subsidiaries That Are Not Guarantors on Debt Number of Subsidiaries That Are Not Guarantors on Debt Business Combinations Business Combination Disclosure [Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Common Stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Revolving Credit Facility Revolving Credit Facility [Member] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Basic (in shares) Basic weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Spread on variable rate Debt Instrument, Basis Spread on Variable Rate Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Net Cash Provided by Operating Activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Accrued and other liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Industrial Industrial [Member] Industrial [Member] Property, Plant and Equipment Property, Plant and Equipment [Member] Accrued income tax and sales tax Accrued Income Taxes And Other Current Accrued Income Taxes And Other, Current Accumulated Other Comprehensive Loss Comprehensive Income, Policy [Policy Text Block] Loss Contingencies [Table] Loss Contingencies [Table] Outstanding standby letters of credit Letters of Credit Outstanding, Amount Purchase price of acquisition Payments to Acquire Businesses, Net of Cash Acquired Common stock, shares authorized (in shares) Common Stock, Shares Authorized Percentage of outstanding common stock acquired Business Acquisition, Percentage of Voting Interests Acquired Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities 2018 Term Loan New 2018 Term Loan Maturing November 21, 2025 [Member] New 2018 Term Loan Maturing November 21, 2025 Financial Information by Reportable Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Spread on base rate Debt Instrument, Basis Spread on Fixed Rate, Base Rate Debt Instrument, Basis Spread on Fixed Rate, Base Rate Amortization of actuarial loss - total before tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax Revision of Prior Period, Reclassification, Adjustment Revision of Prior Period, Reclassification, Adjustment [Member] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Document Period End Date Document Period End Date Inventories Inventory, Policy [Policy Text Block] Income Tax Expense Income tax expense (benefit) Income Tax Expense (Benefit) Entity Registrant Name Entity Registrant Name Income Statement [Abstract] Income Statement [Abstract] Cash and Cash Equivalents at Beginning of Period Cash and Cash Equivalents at End of Period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Non-Current Operating Lease Liabilities Operating Lease, Liability, Noncurrent Accrued and other liabilities Total Accrued Liabilities, Current Diluted earnings per share (in dollars per share) Diluted (in dollars per share) Earnings Per Share, Diluted Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Payments to acquire business Payments to Acquire Businesses, Gross Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] Segment Assets Reconciliation of Assets from Segment to Consolidated [Table Text Block] Interest rate hedge Hedging Assets, Noncurrent Use of Estimates Use of Estimates, Policy [Policy Text Block] Current Assets Assets, Current [Abstract] Amortization of actuarial losses Defined Benefit Plan Amortization Of Actuarial Gains Losses Defined Benefit Plan, Amortization of Actuarial (Gains) Losses Goodwill, expected tax deductible amount Business Acquisition, Goodwill, Expected Tax Deductible Amount Long-term debt Long-term Debt, Gross Long Term Debt Summary Schedule of Long-term Debt Instruments [Table Text Block] Nobles Worldwide, Inc. Nobles Worldwide, Inc. [Member] Nobles Worldwide, Inc. [Member] Other assets Increase (Decrease) in Other Operating Assets Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Stock Options Exercised Stock Issued During Period, Value, Stock Options Exercised Gross goodwill Goodwill, Gross New Term Loan Maturing December 20, 2024 New Term Loan Maturing December 20, 2024 [Member] New Term Loan Maturing December 20, 2024 Comprehensive Income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Electronic Systems Electronic Systems [Member] Electronic Systems [Member] Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity El Mirage and Monrovia, California Location One [Member] Location 1 [Member] Award Type Award Type [Axis] Interest Rate Cap Interest Rate Cap [Member] Repayments of term loans Repayments of secured debt Repayments of Secured Debt Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Consolidation Items [Domain] Consolidation Items [Domain] Amortization of debt issuance costs Amortization of Debt Issuance Costs 2018 Revolving Credit Facility Maturing November 21, 2023 New 2018 Revolving Credit Facility Maturing November 21, 2023 [Member] New 2018 Revolving Credit Facility Maturing November 21, 2023 Maximum Maximum [Member] Security Exchange Name Security Exchange Name Federal Funds Rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Repayments of other debt Repayments of Other Debt Entity Tax Identification Number Entity Tax Identification Number Long-Term Debt Long-term Debt [Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Retained Earnings Retained Earnings [Member] Borrowings from senior secured revolving credit facility Proceeds from Secured Lines of Credit Term loans Senior Secured Term Loan [Member] Senior Secured Term Loan [Member] Reserve for estimated liability Loss Contingency Accrual New Credit Facilities New Credit Facilities [Member] New Credit Facilities [Member] Remaining performance obligation, percentage Revenue, Remaining Performance Obligation, Percentage Components of Net Periodic Pension Cost Schedule of Net Benefit Costs [Table Text Block] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Net Cash Used in Investing Activities Net Cash Provided by (Used in) Investing Activities Award Type [Domain] Award Type [Domain] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Income Before Taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Trading Symbol Trading Symbol Document Transition Report Document Transition Report Current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Amortization of actuarial losses and prior service costs, tax benefits Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax Accumulated goodwill impairment Goodwill, Impaired, Accumulated Impairment Loss Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Indemnifications Guarantees And Indemnifications [Text Block] Guarantees and Indemnifications. Summary of Inventories Schedule of Inventory, Current [Table Text Block] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Stock-based compensation expense Share-based Payment Arrangement, Noncash Expense Stock Repurchased Related to the Exercise of Stock Options and Stock Awards Vested Stock Repurchased During Period, Value Structural Systems Structural Systems [Member] Structural Systems [Member] Base Rate Base Rate [Member] Current Liabilities Liabilities, Current [Abstract] Production cost of contracts Increase (Decrease) in Production Cost of Contract Increase (Decrease) in Production Cost of Contract Insurance recoveries related to loss on operating assets Proceeds from Insurance Settlement, Operating Activities Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Inventories Inventories [Member] Proceeds from lines of credit Proceeds from Lines of Credit Recent Accounting Pronouncements and Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract]