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Entity Filer Category Entity Filer Category Debt covenant, consolidated leverage ratio (less than) Debt Instrument, Covenant, Leverage Ratio, Maximum Allowed Debt Instrument, Covenant, Leverage Ratio, Maximum allowed Basic (in shares) Weighted average basic shares (in shares) Weighted Average Number of Shares Outstanding, Basic Federal Current Federal Tax Expense (Benefit) Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] United States UNITED STATES Liabilities: Liabilities, Fair Value Disclosure [Abstract] Compensation expense Share-Based Payment Arrangement, Expense Commitments and Contingencies (Note H) Commitments and Contingencies Security Exchange Name Security Exchange Name Amended And Restated Credit Agreement Amended And Restated Credit Agreement [Member] Amended And Restated Credit Agreement [Member] Schedule of Quarterly Financial Information Quarterly Financial Information [Table Text Block] Preferred stock, par value $0.01; 5,000,000 shares authorized; none issued Preferred Stock, Value, Issued Restricted Stock Restricted Stock [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Revenues Revenue Revenue from Contract with Customer, Excluding Assessed Tax Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Income taxes Increase (Decrease) in Income Taxes Payable Restricted stock issuable to eligible Board of Directors members annually (in shares) Share Based Compensation Arrangement By Share Based Payment Award Annual Shares Issuable Share-based compensation arrangement by share-based payment award annual shares issuable. Common stock, capital shares reserved for future issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Cover [Abstract] Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Entity Voluntary Filers Entity Voluntary Filers Impairment of goodwill Goodwill, Impairment Loss Restructuring and Related Activities [Abstract] Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Undistributed earnings of foreign subsidiaries Undistributed Earnings of Foreign Subsidiaries Mexico, Central and South America Mexico, Central America And South America [Member] Mexico, Central America And South America [Member] Revenue Revenue from Contract with Customer [Text Block] Segment Reporting [Abstract] Segment Reporting [Abstract] Uncollectible accounts written off, net of recoveries Allowance For Doubtful Accounts Receivable Write Offs Recoveries Allowance for doubtful accounts receivable write offs (recoveries). Revenue from External Customers by Products and Services [Table] Revenue from External Customers by Products and Services [Table] Investment [Domain] Investments [Domain] Forecast Forecast [Member] Gain on cash surrender value of life insurance Gain (Loss) On Cash Surrender Value Of Life Insurance Gain (Loss) On Cash Surrender Value Of Life Insurance Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Cash collateral requirement for guarantees Credit Agreement, Cash Collateral Requirement for Guarantees, Period, Greater Than Credit Agreement, Cash Collateral Requirement for Guarantees, Period, Greater Than Shares withheld in lieu of employee tax withholding Payment, Tax Withholding, Share-Based Payment Arrangement Total Liabilities and Stockholders' Equity Liabilities and Equity Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Eurocurrency Rate Eurodollar [Member] Guarantor Obligations, Nature Guarantor Obligations, Nature [Axis] Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Land Land [Member] Dilutive effect of restricted stock units (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Warranty Costs Standard Product Warranty, Policy [Policy Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Gross assets Deferred tax assets Deferred Tax Assets, Gross Schedule of Income Before Income Taxes Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Authorized plan extension period Share-Based Compensation Arrangement by Share-Based Payment Award, Authorized Plan Extension Period Share-Based Compensation Arrangement by Share-Based Payment Award, Authorized Plan Extension Period Current Fiscal Year End Date Current Fiscal Year End Date Less: present value discount (imputed interest) Lessee, Operating Lease, Liability, Undiscounted Excess Amount Vesting Vesting [Axis] Diluted (in dollars per share) Earnings Per Share, Diluted Vesting of Second Anniversary Share-Based Payment Arrangement, Tranche Two [Member] Proceeds from sale of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment Vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Total Current Liabilities Liabilities, Current Uniform capitalization and inventory Deferred Tax Assets Uniform Capitalization And Inventory Deferred tax assets uniform capitalization and inventory. 2024 Lessee, Operating Lease, Liability, to be Paid, Year Two Other current assets Other Assets, Current Balance at beginning of period Balance at end of period Unrecognized Tax Benefits Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Divestiture Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Unrecognized tax benefits, if recognized, would impact the effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate U.S. Income (Loss) from Continuing Operations before Income Taxes, Domestic Revenue, Remaining Performance Obligation, Amount Revenue, Remaining Performance Obligation, Amount Revenue from Contract with Customer Benchmark Revenue from Contract with Customer Benchmark [Member] Maturities of Operating Lease Liabilities Lessee, Operating Lease, Liability, Maturity [Table Text Block] Entity Address, Address Line One Entity Address, Address Line One Income Tax Authority [Domain] Income Tax Authority [Domain] Product and Service [Axis] Product and Service [Axis] Europe Europe [Member] Class of Stock Class of Stock [Domain] Increase in valuation allowance Decrease in valuation allowance Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Final annual redemption Debt Instrument, Annual Principal Payment Amount of credit facility remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Net contract asset Contract With Customer, Asset (Liability), Net, Current Contract with Customer, Asset (Liability), Net, Current Credit Facility Credit Facility [Axis] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Total long-term debt Long-Term Debt and Lease Obligation Provision for excess and obsolete inventory Inventory Valuation Reserves Components of Long-Term Debt Schedule of Long-Term Debt Instruments [Table Text Block] Machinery and equipment Machinery and Equipment [Member] Subsequent Event [Table] Subsequent Event [Table] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Entity Tax Identification Number Entity Tax Identification Number Number of shares authorized (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Unfunded liability Defined Benefit Plan, Funded (Unfunded) Status of Plan Schedule of Long-Lived Assets by Region Long-Lived Assets by Geographic Areas [Table Text Block] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Deferred tax liabilities Deferred Tax Liabilities, Gross Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Contract assets Contract with Customer, Asset, after Allowance for Credit Loss, Current Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward] Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward] Schedule of Deferred Compensation Arrangement with Individual, Postretirement Benefits [Table] Schedule of Deferred Compensation Arrangement with Individual, Postretirement Benefits [Table] Quarterly Financial Information Disclosure [Abstract] Quarterly Financial Information Disclosure [Abstract] Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Entity Central Index Key Entity Central Index Key Interest income, net Investment Income, Interest Measurement Frequency [Axis] Measurement Frequency [Axis] Research and Development Expense Research and Development Expense, Policy [Policy Text Block] Shares withheld in lieu of employee tax withholding Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Other current liabilities Other Accrued Liabilities, Current Entity Entity [Domain] City Area Code City Area Code ASSETS Assets [Abstract] Other, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Letters of credit, collateral outstanding (not to be less than) Letter of Credit, Collateral Amount, Minimum Outstanding Letter of Credit, Collateral Amount, Minimum Outstanding Retirement Benefits [Abstract] Retirement Benefits [Abstract] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Long-term contract beginning Long-term Contract, Period Long-term Contract, Period Traction power Traction Power Customer [Member] Traction Power Customer [Member] Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Cash surrender value of life insurance Cash Surrender Value of Life Insurance Variable Rate Variable Rate [Axis] Other long-term liabilities Other Liabilities, Noncurrent 2014 Non-Employee Director Equity Incentive Plan Non Employee Director Equity Incentive Plan [Member] 2014 Non-Employee Director Equity Incentive Plan Member Disposal Group Classification [Domain] Disposal Group Classification [Domain] Standard assurance warranty period Standard Assurance Warranty, Period Standard Assurance Warranty, Period Purchases of property, plant and equipment Payments to Acquire Property, Plant, and Equipment Deferred compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Computation of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]