Business Acquisition [Axis] Business Acquisition [Axis] Foreign Current Foreign Tax Expense (Benefit) Foreign currency translation Foreign Currency Transactions and Translations Policy [Policy Text Block] Reserve for uncollectable accounts income (expense) Accounts Receivable, Credit Loss Expense (Reversal) Derivative Asset Statement Of Financial Position Extensible Enumeration Not Disclosed Flag Derivative Asset Statement Of Financial Position Extensible Enumeration Not Disclosed Flag Derivative Asset Statement Of Financial Position Extensible Enumeration Not Disclosed Flag Deferred tax assets (Note 14) Deferred Income Tax Assets, Net Property, plant, and equipment - net Finance Lease, Right-of-Use Asset, after Accumulated Amortization Property, Plant and Equipment [Abstract] Deferred: Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Table Text Block] Debt Instrument [Axis] Debt Instrument [Axis] Pension and post-retirement benefit plan, tax Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax Total finance lease liabilities Lease obligations payable in installments through 2024 with a weighted average interest rate of 4.80% as of December 31, 2022 and 4.14% as of December 31, 2021 Finance Lease, Liability Expenditures for Long-Lived Assets Property, Plant and Equipment, Additions Other Income and Expenses [Abstract] Paid-in capital Additional Paid in Capital Remedial work anticipated clean up period Remedial Work Anticipated Clean Up Period Remedial Work Anticipated Clean Up Period Debt instrument, basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate 2026 Finance Lease, Liability, to be Paid, Year Four Depreciation Depreciation Net deferred tax (liabilities) assets Deferred Tax Assets, Net Omnibus Plan Omnibus Plan [Member] The Omnibus Plan Operating lease weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent Stock compensation plans (in shares) Incremental Common Shares Attributable to Dilutive Effect of Nonvested Shares with Forfeitable Dividends Derivative Liability, Statement of Financial Position [Extensible Enumeration] Derivative Liability, Statement of Financial Position [Extensible Enumeration] State Current State and Local Tax Expense (Benefit) 2025 Finance Lease, Liability, to be Paid, Year Three Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Anti-dilutive share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Operating Leases Lessee, Operating Lease, Liability, to be Paid [Abstract] Fully Vested and Restricted Stock Fully Vested and Restricted Stock [Member] Fully Vested and Restricted Stock Other Effective Income Tax Rate Reconciliation, Other Adjustments, Percent 2028 and thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Equity Component [Domain] Equity Component [Domain] Net cash used in discontinued operating activities Cash Provided by (Used in) Operating Activities, Discontinued Operations Over time sales, amount Over Time Sales, Amount Over Time Sales, Amount Amortization of finance leases Finance Lease, Right-of-Use Asset, Amortization Effective Income Tax Rate Reconciliation, Percent Effective Income Tax Rate Reconciliation, Percent [Abstract] Lessee, Lease, Description Lessee, Lease, Description [Line Items] Amounts reclassified to accrued settlement Standard Product Warranty Accrual, Reclassification Standard Product Warranty Accrual, Reclassification Rail Products and Global Friction Management Rail Products And Friction Management [Member] Rail Products And Friction Management [Member] Achievement of EBITDA Margin Achievement of EBITDA Margin [Member] Achievement of EBITDA Margin Fair value of assets at beginning of year Fair value of assets at end of year Fair value of plan assets Defined Benefit Plan, Plan Assets, Amount Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Plan Name [Domain] Plan Name [Domain] Revolving credit facility with an interest rate of 6.93% as of December 31, 2022 and 1.61% as of December 31, 2021 Line of credit facility, amount outstanding Long-Term Line of Credit Entity Address, State Entity Address, State or Province Unremitted earnings of foreign subsidiaries Unremitted earnings of foreign subsidiary Deferred Tax Liabilities, Undistributed Foreign Earnings Accrual for Environmental Loss Contingencies Accrual for Environmental Loss Contingencies [Roll Forward] Award Type [Axis] Award Type [Axis] Actuarial gain Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) 2027 Defined Benefit Plan, Expected Future Benefit Payment, Year Five Other current liabilities Operating Lease, Liability, Current SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] Finance lease cost: Lease, Cost [Abstract] Proceeds from divestiture of businesses Proceeds from Divestiture of Businesses Current portion of accrued settlement (Note 18) Current portion of accrued settlement Accrued Legal Settlement, Current Accrued Legal Settlement, Current Lender Name [Axis] Lender Name [Axis] Property, plant, and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Operating lease weighted-average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Proceeds from divestiture of assets Proceeds from Sale of Productive Assets Share-based Compensation Arrangement by Share-based Payment Award Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] CASH FLOWS FROM INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] Schedule of Expected Benefit Payments Schedule of Expected Benefit Payments [Table Text Block] Operating leases Operating Lease, Assets And Liabilities, Lessee [Abstract] Operating Lease, Assets And Liabilities, Lessee Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Document Type Document Type Property, plant and equipment useful life Property, Plant and Equipment, Useful Life Components of net periodic benefit cost: Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] Revenue from External Customer Revenue from External Customer [Line Items] Warranty liability utilized Standard Product Warranty Accrual, Decrease for Payments Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Weighted average share price, beginning balance (usd per share) Weighted average share price, ending balance (usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Finance Leases Finance Lease, Liability, to be Paid [Abstract] Deferred income taxes Total deferred Deferred Income Tax Expense (Benefit) Other assets (long-term liabilities) Assets for Plan Benefits, Defined Benefit Plan Capitalized research expenditures Deferred Tax Assets, Capitalized R&E Expenditures Deferred Tax Assets, Capitalized R&E Expenditures Developed Technology Rights Developed Technology Rights [Member] Vesting period one Share-Based Payment Arrangement, Tranche One [Member] Other Other Investments [Member] Schedule of Costs of Retirement Plans Schedule of Costs of Retirement Plans [Table Text Block] Business combination, stock acquire Business combination, stock acquire Total Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Write-off against allowance Accounts Receivable, Allowance for Credit Loss, Writeoff Balance Sheet Location Lessee, Balance Sheet Locations [Table Text Block] Lessee, Balance Sheet Locations Debt Disclosure [Abstract] Debt Disclosure [Abstract] Acquisition consideration threshold percent Acquisition Consideration Threshold Percent Maximum Acquisition Consideration Threshold Percent Maximum Diluted (loss) earnings per share, Pro forma (usd per share) Business Acquisition, Pro Forma Earnings Per Share, Diluted Employer contribution Defined Benefit Plan, Plan Assets, Contributions by Employer Other accrued liabilities Accrued Liabilities, Current Net cash provided by (used in) continuing financing activities Net Cash Provided by (Used in) Financing Activities Accounting Policies [Abstract] Issued (forfeited) for stock-based compensation plans (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, Forfeited Loss (gain) on asset divestiture Pre-tax loss Gain (Loss) on Disposition of Business Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Foreign tax rate differential Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Proceeds of total sales expected Proceeds from Divestiture of Interest in Consolidated Subsidiaries Customer [Axis] Customer [Axis] Interest cost Defined Benefit Plan, Interest Cost Long-term debt Finance Lease, Liability, Noncurrent U.K. Government securities Bonds Municipal Bonds [Member] Swap 2 Swap 2 [Member] Swap 2 Significant Components of Income Tax Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] Recognition period for compensation expense not yet recognized Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Property, plant, and equipment Finance Lease, Right-Of-Use Asset, Gross Finance Lease, Right-Of-Use Asset, Gross Derivative Contract [Domain] Derivative Contract [Domain] Gross profit Gross Profit Deferred compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation Entity Registrant Name Entity Registrant Name 2026 Defined Benefit Plan, Expected Future Benefit Payment, Year Four Subsequent Events Subsequent Events [Text Block] Contingent liabilities Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies Benefits paid Defined Benefit Plan, Benefit Obligation, Benefits Paid Retirement Plans Retirement Benefits [Text Block] Leases [Abstract] Mutual funds Mutual Fund [Member] Total stockholders’ equity Beginning balance Ending balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Omnibus Incentive Plan Omnibus Incentive Plan [Member] Omnibus Incentive Plan Minimum Minimum [Member] Entity Emerging Growth Company Entity Emerging Growth Company Common stock, par value (usd per share) Common Stock, Par or Stated Value Per Share Unrealized gain on cash flow hedges, net of tax expense of $0 and $44, respectively Unrealized derivative loss on cash flow hedges Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Other intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Fair Value Measurements Fair Value Disclosures [Text Block] Operating loss carryforward, valuation allowance Operating Loss Carryforwards, Valuation Allowance Trading Symbol(s) Trading Symbol Entity File Number Entity File Number Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Income (Loss) [Line Items] 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Four Machinery and equipment, including equipment under finance leases Machinery And Equipment Including Equipment Under Capitalized Leases [Member] Machinery and equipment including equipment under capitalized leases. Amounts attributable to noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Foreign Deferred Foreign Income Tax Expense (Benefit) Title of Individual [Axis] Title of Individual [Axis] Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Total income tax expense/ Effective rate Effective Income Tax Rate Reconciliation, Percent Defined benefit plans, estimated future employer contributions in current fiscal year Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year Defined Contribution Plan [Table] Defined Contribution Plan [Table] Use of estimates Use of Estimates, Policy [Policy Text Block] Accounts payable Increase (Decrease) in Accounts Payable VanHooseCo VanHooseCo Enterprises Ltd [Member] VanHooseCo Enterprises Ltd Net (loss) income attributable to L.B. Foster Company Business Acquisition, Pro Forma Net Income (Loss) Income Taxes Income Tax Disclosure [Text Block] Finished goods Inventory, Finished Goods, Net of Reserves Credit Facility [Domain] Credit Facility [Domain] Schedule of Changes in Accumulated Postemployment Benefit Obligations Schedule of Changes in Accumulated Postemployment Benefit Obligations [Table Text Block] Basic (loss) earnings per common share (usd per share) Earnings Per Share, Basic Cash flow hedges reclassified to earnings, tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Revenues from External Customers and Long-Lived Assets Revenues from External Customers and Long-Lived Assets [Line Items] Unallocated corporate assets Corporate, Non-Segment [Member] Entity Interactive Data Current Entity Interactive Data Current Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Change in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] 2027 Finance Lease, Liability, to be Paid, Year Five Liquidity covenant Liquidity covenant Required amount of undrawn availability of a debt instrument. Treasury stock acquisitions Payments for Repurchase of Common Stock 2028 and thereafter Long-Term Debt, Maturity, after Year Five Income taxes Income Tax, Policy [Policy Text Block] Operating Loss Carryforwards Operating Loss Carryforwards [Line Items] Repayments of debt Repayments of Other Long-Term Debt Current: Current Federal, State and Local, Tax Expense (Benefit) [Abstract] Retirement Plan Sponsor Location [Axis] Retirement Plan Sponsor Location [Axis] Current assets: Assets, Current [Abstract] Number of employment agreement Number Of Employment Agreements Number Of Employment Agreements Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Revenue from Customer by Major Geographical Region Revenue from External Customers by Geographic Areas [Table Text Block] Retained earnings Retained Earnings (Accumulated Deficit) Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Other Other Geographical Locations [Member] Other Geographical Locations Scenario, Unspecified [Domain] Scenario [Domain] Schedule of Business Acquisition, Pro Forma Information Business Acquisition, Pro Forma Information [Table Text Block] Document Fiscal Year Focus Document Fiscal Year Focus Foreign Plan Foreign Plan [Member] Plan Asset Categories [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Financing cash flows from finance leases Finance Lease, Principal Payments Proceeds from debt Proceeds from Issuance of Other Long-Term Debt Fair Value, Hierarchy [Axis] Fair Value Hierarchy and NAV [Axis] Loss Contingencies [Table] Loss Contingencies [Table] Total current Current Income Tax Expense (Benefit) Sales of goods Product [Member] ContractwithCustomerLiabilityIncreasefromCashReceipts ContractwithCustomerLiabilityIncreasefromCashReceipts Inventories Increase (Decrease) in Inventories Line of credit facility, current borrowing capacity Line of Credit Facility, Current Borrowing Capacity Common stock, shares outstanding (in shares) Beginning (shares) Ending (shares) Common Stock, Shares, Outstanding Goodwill (Note 5) Goodwill Goodwill, beginning balance Goodwill, ending balance Goodwill Warranty Liability Movement in Standard Product Warranty Accrual [Roll Forward] Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Actual (loss) gain on plan assets Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) Total mutual funds and equities Equity Funds [Member] Income tax expense (Note 14) Total income tax expense Income Tax Expense (Benefit) Geographical [Domain] Geographical [Domain] Less: valuation allowance Deferred tax asset valuation allowance Deferred Tax Assets, Valuation Allowance Deferred tax liabilities (Note 14) Deferred Income Tax Liabilities, Net Entity Public Float Entity Public Float Number of potentially responsible parties included in agreement Number of Potentially Responsible Parties Included in Agreement Number of Potentially Responsible Parties Included in Agreement Interest rate swaps Derivative Liability Share-based payment award, maximum number of shares per employee (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Number of Shares Per Employee Loss Contingencies [Line Items] Loss Contingencies [Line Items] 2023 Defined Benefit Plan, Expected Future Benefit Payment, Year One Accounts Receivable, Allowance for Credit Loss [Roll Forward] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Common stock, par value $0.01, authorized 20,000,000 shares; shares issued at December 31, 2022 and December 31, 2021, 11,115,779; shares outstanding at December 31, 2022 and December 31, 2021, 10,776,827 and 10,670,343, respectively (Note 11) Common Stock, Value, Issued Diluted earnings (loss) from discontinued operations per common share (usd per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Insurance proceeds Insurance Proceeds Insurance proceeds Accumulated amortization Finance Lease, Right-Of-Use Asset, Accumulated Depreciation Finance Lease, Right-Of-Use Asset, Accumulated Depreciation Accumulated benefit obligation Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation Other Other Income 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 Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Current liabilities: Liabilities, Current [Abstract] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Deferred revenue (Note 4) Deferred revenue Contract with Customer, Liability, Current Interest on lease liabilities Finance Lease, Interest Expense Percentage Of Goodwill Impairment Goodwill, Impairment Percentage Goodwill, Impairment Percentage Retirement Plan Type [Domain] Retirement Plan Type [Domain] Amendment Flag Amendment Flag Finite lived intangible asset, useful life Weighted Average Amortization Period In Years Finite-Lived Intangible Asset, Useful Life Operating lease cost Operating Lease, Cost SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] Total comprehensive (loss) income from continuing operations Other Comprehensive Income (Loss), Net of Tax Acquisitions Goodwill, Acquired During Period Net cash used in continuing operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net sales Business Acquisition, Pro Forma Revenue Acquisitions and Divestitures Mergers, Acquisitions and Dispositions Disclosures [Text Block] Construction in progress Construction in Progress [Member] Tax benefits related to disposition of the Test and Inspection Services business Effective Income Tax Rate Reconciliation, Disposition of Business, Percent Goodwill and Intangible Assets Disclosure [Abstract] Other assets Other Assets, Noncurrent Goodwill and other intangible assets Goodwill and Intangible Assets, Policy [Policy Text Block] 2028 and thereafter Finite-Lived Intangible Asset, Expected Amortization, after Year Five Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Expenditures for Long-Lived Assets: Payments to Acquire Property, Plant, and Equipment [Abstract] Entity Incorporation, State Entity Incorporation, State or Country Code Operating cash flows from operating leases Operating Lease, Payments Restricted Stock And Performance Shares Ristricted Stock And Performance Shares Combined [Member] Restricted Stock And Performance Shares Combined Share-based Payment Arrangement, Option Share-Based Payment Arrangement, Option [Member] Domestic Plan Domestic Plan [Member] Pension and post-retirement benefit plans benefit, net of tax benefit of $357 and $422, respectively Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax Other Income Other Income and Other Expense Disclosure [Text Block] Allowance for credit losses Accounts Receivable, Allowance for Credit Loss, Current Interest deduction carryforward Deferred Tax Asset, Interest Carryforward Common stock, shares authorized (in shares) Common Stock, Shares Authorized Number of retirement plans Number of retirement plans Number of retirement plans offered by the company. Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Maximum Maximum [Member] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Deferred revenue Increase (Decrease) in Contract with Customer, Liability Net operating loss / tax credit carryforwards Deferred tax assets, operating loss and tax credit carryforwards Deferred tax assets, operating loss and tax credit carryforwards Business Acquisition [Line Items] Business Acquisition [Line Items] Investment of noncontrolling interest Noncontrolling Interest, Period Increase (Decrease) Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Schedule of Net Benefit Costs Schedule of Net Benefit Costs [Table Text Block] From discontinued operations (usd per share) Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax, Per Diluted Share Net (loss) income Net (loss) income from continuing operations Net (loss) income Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Environmental Loss Contingency Statement Of Financial Position Extensible Enumeration Not Disclosed Flag Environmental Loss Contingency Statement Of Financial Position Extensible Enumeration Not Disclosed Flag Environmental Loss Contingency Statement Of Financial Position Extensible Enumeration Not Disclosed Flag Line of Credit Facility [Table] Line of Credit Facility [Table] Cash paid for amounts included in the measurement of lease liabilities: Cash paid for amounts included in the measurement of lease liabilities [Abstract] Cash paid for amounts included in the measurement of lease liabilities Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Line of credit, accordion feature, lower borrowing capacity Line of Credit, Accordion Feature, Lower Borrowing Capacity Option Line of Credit, Accordion Feature, Lower Borrowing Capacity Option Adjustment for incentive awards expected to vest (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Adjustment for Incentive Awards Expected to Vest The number of equity-based payment instruments, excluding stock (or unit) options, that are now expected to vest. Percentage of Plan assets Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage Income from discontinued operations before income taxes Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Sublease income Sublease Income Title of Each Class Title of 12(b) Security Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Reconciliation of Unrealized tax Benefits Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Subsequent Event [Line Items] Subsequent Event [Line Items] Annual commitment amount Long-term Purchase Commitment, Annual Commitment Amount Long-term Purchase Commitment, Annual Commitment Amount Schedule of Weighted Average Assumptions Used Defined Benefit Plan, Assumptions [Table Text Block] Business Segments Segment Reporting Disclosure [Text Block] Schedule of Intangible Assets Schedule of Intangible Assets and Goodwill [Table Text Block] Technology Services and Solutions Rail Technologies Products [Member] Rail Technologies products Number of manufacturing facilities Number Of Manufacturing Facilities Number Of Manufacturing Facilities Reclassification of pension liability adjustments to earnings, tax Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax Net deferred tax (liabilities) assets Deferred Tax Liabilities, Net LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Litigation settlement amount Litigation Settlement, Amount Awarded to Other Party Inventories - net (Note 7) Inventories - net Inventory, Net Accounts payable Accounts Payable, Current Income Tax Authority [Axis] Income Tax Authority [Axis] Litigation settlement installment payment term Litigation Settlement Installment Payment Term Litigation Settlement Installment Payment Term From continuing operations (usd per share) Basic earnings from continuing operations (usd per share) Income (Loss) from Continuing Operations, Per Basic Share Less: accumulated depreciation and amortization, including accumulated amortization of finance leases Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization Denominator for basic earnings per common share (shares) Weighted Average Number of Shares Outstanding, Basic Change to plan assets: Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Target percentage of plan assets Defined Benefit Plan, Plan Assets, Target Allocation, Percentage (Gain) on Piling Products division asset sale Gain (Loss) on Disposition of Assets Derivative, notional amount Derivative, Notional Amount Weighted average health care trend rate (percent) Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year Restricted Stock Restricted Stock [Member] Over time input method Over Time Input Method [Member] Over Time Input Method Property, Plant and Equipment Property, Plant and Equipment [Line Items] Share-Based Payment Arrangement, Noncash Expense [Abstract] Corporate bonds Corporate Bond Securities [Member] Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer 2024 Estimated Litigation Liability, Amount Awarded to Other Party, Payment Due Year Two Estimated Litigation Liability, Amount Awarded to Other Party, Payment Due Year Two Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Stock-based Compensation Share-Based Payment Arrangement [Text Block] Non-deductible expenses Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent Allowance for credit losses, beginning balance Allowance for credit losses, ending balance Accounts Receivable, Allowance for Credit Loss Foreign currency exchange rate changes Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss) Work-in-process Inventory, Work in Process, Net of Reserves Accounts receivable Deferred Tax Assets, Accounts Receivable Deferred Tax Assets, Accounts Receivable Revenue from External Customers by Products and Services [Table] Revenue from External Customers by Products and Services [Table] Noncontrolling Interest Noncontrolling Interest [Member] Interest expense - net Interest Income (Expense), Net Debt instrument, term Debt Instrument, Term Significant Components of Deferred Tax Asset and Liability Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Goodwill Goodwill [Roll Forward] Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Land Land [Member] Increase (decrease) in gross carrying value of intangible assets Finite-Lived Intangible Assets, Gross, Period Increase (Decrease) Finite-Lived Intangible Assets, Gross, Period Increase (Decrease) Diluted (loss) earnings per common share: Earnings Per Share, Diluted [Abstract] Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] Schedule of Common Stock Outstanding Roll Forward Schedule of Common Stock Outstanding Roll Forward [Table Text Block] Acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Debt Instrument, Redemption, Period One Debt Instrument, Redemption, Period One [Member] Current Fiscal Year End Date Current Fiscal Year End Date Finite-Lived Intangible Assets Finite-Lived Intangible Assets [Line Items] Vesting period two Share-Based Payment Arrangement, Tranche Two [Member] (Gain) loss on sales and disposals of property, plant, and equipment Gain (Loss) on Disposition of Property Plant Equipment Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Unrealized income on interest rate swap contracts Deferred Tax Liabilities, Derivatives Total current liabilities Liabilities, Current Accounts Receivable Detail Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Unrecognized tax benefit that would impact effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Revenue remaining performance obligation Revenue, Remaining Performance Obligation, Amount Performance based incentive stock award retention program period Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Change in income tax rates Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Income Tax Authority [Domain] Income Tax Authority [Domain] Total cost of sales Cost of Revenue Other assets: Other Assets, Noncurrent [Abstract] Other Income Interest and Other Income [Table Text Block] Finance lease weighted-average remaining lease term Finance Lease, Weighted Average Remaining Lease Term Fair Value Disclosures [Abstract] Credit Facility [Axis] Credit Facility [Axis] Long-term debt (Note 10) Long-term portion Long-Term Debt and Lease Obligation Equity [Abstract] 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 Allocation of purchase price Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] Entity Tax Identification Number Entity Tax Identification Number Share-based compensation, number of shares authorized (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Schedule of Nonvested Share Activity Schedule of Nonvested Share Activity [Table Text Block] PNC Bank N.A. Citizens Bank N.A. Wells Fargo Bank National Association Bank of America N.A. And BMO Harris Bank National Association PNC Bank N.A. Citizens Bank N.A. Wells Fargo Bank National Association Bank of America N.A. And BMO Harris Bank National Association [Member] PNC Bank N.A. Citizens Bank N.A. Wells Fargo Bank National Association Bank of America N.A. And BMO Harris Bank National Association Fabricated Steel Products Fabricated Steel Products [Member] Fabricated Steel Products Favorable lease Off-Market Favorable Lease [Member] Shares paid for tax withholding (shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Net (gain) loss Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax Reconciliation of Statutory Income to Income Tax Expense Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Net (decrease) increase in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect State income taxes, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Entity Central Index Key Entity Central Index Key Loss on the sale of Track Components Loss on the Sale of Track Components Loss on the Sale of Track Components Investment income Investment Income, Interest Adjustments related to tax withholding Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Entity [Domain] Entity [Domain] City Area Code City Area Code ASSETS Assets: Assets [Abstract] Legal fees Legal Fees Other current assets Increase (Decrease) in Other Current Assets Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Weighted average interest rate on debt (percent) Long-Term Debt, Weighted Average Interest Rate, at Point in Time 2023 Long-Term Debt, Maturity, Year One Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Corporate expense and other unallocated charges Corporate Expense And Other Unallocated Charges Amount related to corporate expenses, cost of capital elimination, and other unallocated charges. Less comprehensive loss attributable to noncontrolling interest: Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest [Abstract] Variable Rate [Axis] Variable Rate [Axis] Other long-term liabilities Other Liabilities, Noncurrent Other liabilities Increase (Decrease) in Other Operating Liabilities Capital expenditures on property, plant, and equipment Payments to Acquire Property, Plant, and Equipment Escrow deposit Escrow Deposit Purchase commitment Long-Term Purchase Commitment, Amount Weighted Average Weighted Average [Member] 2023 Finite-Lived Intangible Asset, Expected Amortization, Year One Benefit obligation at beginning of year Benefit obligation at end of year Projected benefit obligation Defined Benefit Plan, Benefit Obligation 2028 and thereafter Finance Lease, Liability, to be Paid, after Year Five Business combination, term for payment of deferred consideration Business Combination, Payment of Deferred Consideration, Term Business Combination, Payment of Deferred Consideration, Term Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Interest rate on credit facility (percent) Line of Credit Facility, Interest Rate at Period End Operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Steel Products and Measurement Steel Products And Measurement [Member] Steel Products And Measurement Capital contributions to nonconsolidated investment Payments to Acquire Interest in Subsidiaries and Affiliates Customer [Domain] Customer [Domain] Effective Income Tax Rate Reconciliation, Amount Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Other Postretirement Benefits Plan Other Postretirement Benefits Plan [Member] Maximum leverage ratio Debt Instrument, Covenant, Leverage Ratio, Maximum Debt Instrument, Covenant, Leverage Ratio, Maximum Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Operating lease, liability, payments, due Lessee, Operating Lease, Liability, to be Paid Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Entity Address, Postal Zip Code Entity Address, Postal Zip Code Customer revenue transferred (percentage) RevenueFromContractWithCustomerPercentage Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] 2024 Long-Term Debt, Maturity, Year Two Minimum fixed charge coverage ratio Debt Instrument, Covenant, Interest Coverage Ratio, Minimum Debt Instrument, Covenant, Interest Coverage Ratio, Minimum Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Income Tax Disclosure [Abstract] Current maturities of long-term debt (Note 10) Less: current maturities Long-Term Debt and Lease Obligation, Current Depreciation Deferred Tax Liabilities, Property, Plant and Equipment Deductions SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction Range [Domain] Statistical Measurement [Domain] Long-Lived assets Long-Lived Assets Net periodic pension (gain) cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Schedule of Business Acquisitions, by Acquisition Schedule of Business Acquisitions, by Acquisition [Table Text Block] Domestic Tax Authority Domestic Tax Authority [Member] Defined contribution plan number Defined Contribution Plan Number Number of defined contribution plans offered by the company. Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Property, plant, and equipment - net (Note 8) Property, plant, and equipment - net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Audit Information [Abstract] Audit Information Contract assets transferred to receivables Contract with Customer, Asset, Reclassified to Receivable Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Net (loss) income attributable to L.B. Foster Company Net Income (Loss) Attributable to Parent Leases Lessee, Finance Leases [Text Block] Schedule of Maturities of Long-term Debt Schedule of Maturities of Long-Term Debt [Table Text Block] Amortization of prior service cost Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Accounts receivable Accounts Receivable, before Allowance for Credit Loss, Current Scenario [Axis] Scenario [Axis] Total assets Assets, Fair Value Disclosure Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Share-based payment award vesting rights, percentage Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Leases Lessee, Operating Leases [Text Block] Right-of-use assets obtained in exchange for new lease liabilities: Right-of-Use Assets Obtained in Exchange for Lease Liabilities [Abstract] Right-of-Use Assets Obtained in Exchange for Lease Liabilities Total debt Debt and Lease Obligation Treasury stock - at cost, common stock, shares at December 31, 2022 and December 31, 2021, 338,952 and 445,436, respectively (Note 11) Treasury Stock, Common, Value Plan Name [Axis] Plan Name [Axis] Contract assets (Note 4) Contract with customer, assets Contract with Customer, Asset, after Allowance for Credit Loss Identifiable intangible assets Finite-Lived Intangible Assets, Net [Abstract] Precast Concrete Products Precast Concrete Products [Member] Precast Concrete Products From continuing operations (usd per share) Diluted earnings from continuing operations per common share (usd per share) Income (Loss) from Continuing Operations, Per Diluted Share Derivative Instrument [Axis] Derivative Instrument [Axis] Goodwill and other intangibles Deferred Tax Liabilities, Goodwill and Intangible Assets Goodwill [Line Items] Goodwill [Line Items] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value, Inputs, Level 1 [Member] Defined Benefit Plan, Expected Future Benefit Payment Defined Benefit Plan, Expected Future Benefit Payment [Abstract] Prior service cost Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax Accounts receivable Increase (Decrease) in Accounts and Other Receivables Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Denominator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Interest rate swaps Derivative Asset Business combination, acquiree, net sales Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Tax benefits related to disposition of the Test and Inspection Services business Effective Income Tax Rate Reconciliation, Disposition of Business, Amount Receivables [Abstract] Receivables [Abstract] Document Annual Report Document Annual Report Legal Entity [Axis] Legal Entity [Axis] Accounts Receivable Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Geographical [Axis] Geographical [Axis] Weighted average shares outstanding (shares) Weighted Average Number of Shares Issued, Basic Accrued pension obligation Other long-term liabilities Liability, Defined Benefit Plan, Noncurrent Issuance of common shares net of shares withheld for taxes Stock Issued During Period, Value, New Issues Technology Technology-Based Intangible Assets [Member] Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Litigation settlement amount, current Litigation Settlement, Amount Awarded to Other Party, Current Litigation Settlement, Amount Awarded to Other Party, Current Point in time Transferred at Point in Time [Member] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Line of credit facility, increase (decrease) Line of Credit Facility, Increase (Decrease), Net 2025 Defined Benefit Plan, Expected Future Benefit Payment, Year Three Current assets, net of cash acquired on the acquisition date Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets Segments [Axis] Segments [Axis] Long-Term Debt and Related Matters Debt Disclosure [Text Block] Products and Services [Domain] Product and Service [Domain] Entity Shell Company Entity Shell Company Prior Credit Facility Prior Credit Facility [Member] Prior Credit Facility Number of companies receiving general notice letter Number Of Companies Receiving General Notice Letter Number Of Companies Receiving General Notice Letter Decrease based on tax position for prior periods Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Non-deductible expenses Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Schedule of Investment Allocation and Target Allocation Schedule of Allocation of Plan Assets [Table Text Block] 2023 Lessee, Operating Lease, Liability, to be Paid, Year One Net loss to be recognize during the next fiscal period Defined Benefit Plan, Expected Amortization, Next Fiscal Year 2025 Long-Term Debt, Maturity, Year Three Valuation Allowances and Reserves [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Consolidation Items [Domain] Consolidation Items [Domain] Document Period End Date Document Period End Date Schedule of Future Payments of Legal Settlements Schedule of Future Payments of Legal Settlements [Table Text Block] Schedule of Future Payments of Legal Settlements Foreign earnings repatriated Foreign Earnings Repatriated Weighted average shares adjustment for incentive awards expected to vest (usd per share) Share-Based Compensation Arrangement by Share-based Payment Award, Equity Instruments other than Options, Adjustment for Incentive Awards Expected to Vest, Weighted Average Grant Date Fair Value The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the award is now expected to vest. Accumulated Other Comprehensive Loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] TOTAL ASSETS Segment Assets Assets Earnings Per Share [Abstract] Performance Stock Units Performance Shares [Member] Present value or proposed remedial work Present Value of Proposed Remedial Work Present Value of Proposed Remedial Work 2027 Lessee, Operating Lease, Liability, to be Paid, Year Five Income from operations: Operating Income (Loss) [Abstract] Authorized repurchase Stock Repurchase Program, Authorized Amount Accrued payroll and employee benefits Employee-related Liabilities, Current (Loss) income from continuing operations before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Segments [Domain] Segments [Domain] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Earnings Per Common Share Earnings Per Share [Text Block] Other Deferred Tax Liabilities, Other Cash and cash equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Award Type [Domain] Award Type [Domain] Line of credit facility, maximum increase in commitments Line Of Credit Facility, Maximum Increase In Commitments Line Of Credit Facility, Maximum Increase In Commitments Improvements to land and leaseholds Improvements To Land And Leaseholds [Member] Improvements to land and leaseholds Amounts recognized in the consolidated balance sheets consist of: Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] Total net sales (Note 4) Net Sales Revenue from Contract with Customer, Including Assessed Tax Common shares issues net of shares withheld (in shares) Stock Issued During Period, Shares, New Issues Authorized repurchase, annual limitation Stock Repurchase Program, Authorized Amount, Annual Limitation Stock Repurchase Program, Authorized Amount, Annual Limitation Basic earnings (loss) from discontinued operations per common share (usd per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Foreign currency translation impact Goodwill, Foreign Currency Translation Gain (Loss) Foreign currency translation adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Patents Patents [Member] Customer relationships Customer Relationships [Member] Entity Address, City Entity Address, City or Town Number of financial covenants Debt Instrument, Number Of Financial Covenants Debt Instrument, Number Of Financial Covenants Commercial property Commercial Real Estate [Member] Unrealized income on interest rate swap contracts Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Foreign currency exchange rate changes Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss) Years 2028-2032 Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years Noncontrolling interest Stockholders' Equity Attributable to Noncontrolling Interest Statement of Financial Position [Abstract] Raw materials Inventory, Raw Materials, Net of Reserves Asset Category Defined Benefit Plan, Information about Plan Assets [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Treasury Stock Treasury Treasury Stock, Common [Member] Auditor Name Auditor Name Deferred Stock Units Deferred Stock Units [Member] Deferred Stock Units Pension Plan Pension Plan [Member] Operating loss carryforwards Operating Loss Carryforwards Treasury stock shares - at cost, common stock (in shares) Treasury Stock, Common, Shares Research and development expenses Research and Development Expense Canada CANADA Disposal Group Classification [Axis] Disposal Group Classification [Axis] Costs recovered from environmental cleanup activities Environmental Costs Recognized, Recovery Credited to Expense Secretariat of the Federal Revenue Bureau of Brazil Secretariat of the Federal Revenue Bureau of Brazil [Member] Term deposits Cash and Cash Equivalents, Fair Value Disclosure Other comprehensive (loss) income, net of tax: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Schedule of Changes in Fair Value of Plan Assets Schedule of Changes in Fair Value of Plan Assets [Table Text Block] Equity and Incentive Plan Equity and Incentive Plan [Member] Equity and Incentive Plan London Interbank Offered Rate (LIBOR) London Interbank Offered Rate (LIBOR) [Member] Product Liability Contingency Product Liability Contingency [Line Items] Subsequent Events [Abstract] Precast Concrete Buildings Precast Concrete Buildings [Member] Precast Concrete Buildings [Member] Net (loss) income attributable to L.B. Foster Company Net (loss) income from continuing operations attributable to L.B. Foster Company Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent State Deferred State and Local Income Tax Expense (Benefit) Defined Contribution Plan Disclosure Defined Contribution Plan Disclosure [Line Items] Amortization expense (Note 5) Amortization expense Amortization of Intangible Assets Schedule of Goodwill Schedule of Goodwill [Table Text Block] Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities 2025 Lessee, Operating Lease, Liability, to be Paid, Year Three Defined Benefit Plan Disclosure Defined Benefit Plan Disclosure [Line Items] Pension and post-retirement benefit plan adjustments Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Lessee remaining lease term Lessee, Remaining Lease Term Lessee, Remaining Lease Term Inventory Inventory, Policy [Policy Text Block] Total L.B. Foster Company stockholders’ equity Accumulated other comprehensive loss Stockholders' Equity Attributable to Parent Director Director [Member] Weighted average shares canceled and forfeited (usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Vesting [Domain] Vesting [Domain] Line of Credit Facility Line of Credit Facility [Line Items] Fourth Amended And Restated Credit Agreement Fourth Amended And Restated Credit Agreement [Member] Fourth Amended And Restated Credit Agreement Other Deferred Tax Assets, Other Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Numerator for basic and diluted (loss) earnings per common share: Net Income (Loss) Attributable to Parent [Abstract] 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Three 2027 Long-Term Debt, Maturity, Year Five Retained Earnings Retained Earnings [Member] Segment Reporting Information Segment Reporting Information Segment Reporting Information [Line Items] Total lease cost Lease, Cost Common Stock Common Stock [Member] Number of reporting segments Number of Reportable Segments Components of Lease Cost Lease, Cost [Table Text Block] Business combination, contingent consideration, liability Business Combination, Contingent Consideration, Liability Revenue recognition Revenue [Policy Text Block] Statement [Table] Statement [Table] Weighted average shares vested (usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Long-term operating lease liabilities (Note 9) Long-term operating lease liabilities Operating Lease, Liability, Noncurrent Additions to environmental obligations Accrual for Environmental Loss Contingencies, Charges to Expense for New Losses Research tax credit carryforward, amount Deferred Tax Assets, Tax Credit Carryforwards, Research Pension liability adjustment Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent Expenses associated with contributions made Defined Contribution Plan, Cost Range [Axis] Statistical Measurement [Axis] Treasury shares acquired (shares) Treasury Stock, Shares, Acquired Leasehold improvements Leasehold Improvements [Member] Equity Components [Axis] Equity Components [Axis] Investment of noncontrolling interest Proceeds from Noncontrolling Interests Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] United Kingdom UNITED KINGDOM Statement Statement [Line Items] Nonvested Shares, Outstanding, Beginning Balance (in shares) Nonvested Shares, Outstanding, Ending Balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Variable Rate [Domain] Variable Rate [Domain] Net Carrying Amount Finite-Lived Intangible Assets, Gross Selling and administrative expenses Selling, General and Administrative Expense Operating lease right-of-use assets - net (Note 9) Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Loss Comprehensive Income (Loss) Note [Text Block] Auditor Firm ID Auditor Firm ID Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Document Transition Report Document Transition Report 2024 Defined Benefit Plan, Expected Future Benefit Payment, Year Two Foreign tax authority Foreign Tax Authority [Member] Local Phone Number Local Phone Number Operating (loss) income Segment Operating Profit (Loss) Operating (loss) income Operating Income (Loss) Inventories Deferred Tax Assets, Inventory Recently issued accounting guidance New Accounting Pronouncements, Policy [Policy Text Block] Discontinued Operations, Disposed of by Sale Discontinued Operations, Disposed of by Sale [Member] Effect of dilutive securities: Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract] State and local State and Local Jurisdiction [Member] Sales of services Service [Member] Goodwill and intangible asset impairment Goodwill and Intangible Asset Impairment Warranty reserve Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Warranty Reserves Income tax expense (Note 14) Discontinued Operation, Tax Effect of Discontinued Operation Total liabilities Liabilities, Fair Value Disclosure Foreign tax rate differential Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Adjustments to reconcile net (loss) income to cash (used in) provided by continuing operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Non Domestic Non Domestic [Member] Qualifies a tag to denote that the information in question is the portion held outside of the United States. Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Product warranty reserve Beginning balance Ending balance Standard Product Warranty Accrual Product Liability Contingency [Table] Product Liability Contingency [Table] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Property, plant and equipment Property, Plant and Equipment, Policy [Policy Text Block] Schedule of Product Warranty Liability Schedule of Product Warranty Liability [Table Text Block] 2026 Lessee, Operating Lease, Liability, to be Paid, Year Four Income Statement [Abstract] Income Statement [Abstract] Shares granted in period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Federal Deferred Federal Income Tax Expense (Benefit) Goodwill and long-lived assets impairment charges (Note 5) Impairments of property, plant, and equipment Impairment, Long-Lived Asset, Held-for-Use Paid-in Capital Additional Paid-in Capital [Member] Document Fiscal Period Focus Document Fiscal Period Focus Basic (loss) earnings per common share: Earnings Per Share, Basic [Abstract] Proceeds from asset divestiture Proceeds from Sale of Equity Method Investments Tax on unremitted foreign earnings Effective Income Tax Rate Reconciliation, Unremitted Foreign Earnings, Amount Effective Income Tax Rate Reconciliation, Unremitted Foreign Earnings, Amount Denominator for diluted earnings per common share - adjusted weighted average shares outstanding and assumed conversions (in shares) Weighted Average Number of Shares Outstanding, Diluted Schedule of Inventory Schedule of Inventory, Current [Table Text Block] Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Undiscovered remedial work Undiscovered Remedial Work Undiscovered Remedial Work Equity income in nonconsolidated investment Equity loss Income and remeasurement gain This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This amount also includes other income from the remeasurement of equity investments. ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Base Rate Base Rate [Member] Target share price (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Target Share Price Share-based Compensation Arrangement by Share-based Payment Award, Target Share Price Liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Weighted average shares granted (usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Overnight Bank Funding Rate Overnight Bank Funding Rate [Member] Overnight Bank Funding Rate Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Operating Segments Operating Segments [Member] Net loss attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Commitments and Contingent Liabilities Commitments and Contingencies Disclosure [Text Block] Common stock, shares issued (in shares) Common Stock, Shares, Issued Lessee, lease, termination period Lessee, Lease, Termination Period Lessee, Lease, Termination Period Amounts recognized in accumulated other comprehensive loss consist of: Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] Foreign currency transaction gain (loss) Foreign currency losses Foreign Currency Transaction Gain (Loss), before Tax Finance leases Finance Lease, Assets And Liabilities, Lessee [Abstract] Finance Lease, Assets And Liabilities, Lessee Over time Transferred over Time [Member] Business combination, acquisition related costs Business Combination, Acquisition Related Costs Current maturities of long-term debt Finance Lease, Liability, Current UPRR UPRR [Member] The UPRR Net cash (used in) provided by continuing investing activities Net Cash Provided by (Used in) Investing Activities Income from discontinued operations Income from discontinued operations Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax Comprehensive (loss) income from continuing operations attributable to L.B. Foster Company Comprehensive Income (Loss), Net of Tax, Attributable to Parent Entity Current Reporting Status Entity Current Reporting Status Accrued payroll and employee benefits Increase (Decrease) in Employee Related Liabilities 2023 Finance Lease, Liability, to be Paid, Year One Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Environmental remediation and compliance Environmental Costs, Policy [Policy Text Block] Statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Swap Swap [Member] Additions Charged to Costs and Expenses SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense Additions to warranty liability Standard Product Warranty Accrual, Increase for Warranties Issued Coatings and Measurement Coatings And Measurement [Member] Coatings And Measurement Sale of total product divestiture, pre tax gain (loss) Sale of Total Product Divestiture, Pre Tax Gain (Loss) Sale of Total Product Divestiture, Pre Tax Gain (Loss) Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Other Precast Concrete Products Other Precast Concrete Products [Member] Other Precast Concrete Products [Member] State income taxes, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent 2024 Finance Lease, Liability, to be Paid, Year Two Organization, operations, and basis of consolidation Basis of Accounting, Policy [Policy Text Block] Depreciation/Amortization Depreciation, Amortization and Accretion, Net Schedule of Finite-Lived Intangible Assets, Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Increase (decrease) in net carrying value of intangible assets Finite-Lived Intangible Assets, Period Increase (Decrease) Other noncurrent assets Increase (Decrease) in Other Noncurrent Assets Lessee lease renewal term Lessee, Lease, Renewal Term Lessee, Lease, Renewal Term Over time sales, percentage Over Time Sales, Percent Over Time Sales, Percent Relationship to Entity [Domain] Title of Individual [Domain] From discontinued operations (usd per share) Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax, Per Basic Share Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Canceled and forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Other income - net (Note 19) Other income - net Other income - net Other Nonoperating Income (Expense) Business combination, deferred consideration Business Combination, Contingent Consideration, Liability, Noncurrent Accumulated other comprehensive loss (Note 12) Accumulated Other Comprehensive Income (Loss), Net of Tax Accrued settlement Deferred Tax Assets, Accrued Settlement Deferred Tax Assets, Accrued Settlement Expected rate of return on plan assets Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets Total current assets Assets, Current Income taxes (received) paid Income Taxes Paid, Net Unrealized gain (loss) on cash flow hedge, tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax Revenue recognized from contract liability Contract with Customer, Liability, Revenue Recognized Entity Small Business Entity Small Business Other intangibles - net (Note 5) Net Carrying Amount Finite-Lived Intangible Assets, Net Reconciliation of Assets from Segment to Consolidated Reconciliation of Assets from Segment to Consolidated [Table Text Block] Performance obligations expected to be satisfied, expected timing Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Expected cost on shares expected to vest Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Property, Plant and Equipment Property, Plant and Equipment Disclosure [Text Block] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Over time output method Over Time Output Method [Member] Over Time Output Method Retirement Plan Sponsor Location [Domain] Retirement Plan Sponsor Location [Domain] Business Combination and Asset Acquisition [Abstract] Issued for stock-based compensation plans (shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Class of Stock Class of Stock [Line Items] Debt issuance costs Payments of Debt Issuance Costs Total operating lease liabilities Operating Lease, Liability Balance at Beginning of Year Balance at End of Year SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Rail, Technologies, and Services Rail Technologies And Services Segment [Member] Rail Technologies And Services Segment Finance lease liability, payments, due Finance Lease, Liability, to be Paid Finance Lease, Liability, Maturity Finance Lease, Liability, Fiscal Year Maturity [Table Text Block] Schedule of Revenues by Major Product Line Schedule of Revenues by Major Product Line [Table Text Block] Tabular disclosure summarizing sales by major product line. Other current liabilities Increase (Decrease) in Other Accrued Liabilities Total fixed income funds Fixed Income Funds [Member] 2024 Finite-Lived Intangible Asset, Expected Amortization, Year Two Company's stock price Achievement of Stock Price Milestone [Member] Achievement of Stock Price Milestone Benefits paid Defined Benefit Plan, Plan Assets, Benefits Paid Deferred tax assets: Deferred Tax Assets, Net [Abstract] 2023 Estimated Litigation Liability, Amount Awarded to Other Party, Payment Due Year One Estimated Litigation Liability, Amount Awarded to Other Party, Payment Due Year One Environmental liability, beginning balance Environmental liability, ending balance Accrual for Environmental Loss Contingencies 2026 Long-Term Debt, Maturity, Year Four Auditor Location Auditor Location Equity and Incentive Compensation Plan Equity and Incentive Compensation Plan [Member] Equity and Incentive Compensation Plan Income Tax Authority, Name [Axis] Income Tax Authority, Name [Axis] Entity Filer Category Entity Filer Category Federal Current Federal Tax Expense (Benefit) United States UNITED STATES Business combination, acquiree, operating profit Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Name of Each Exchange On Which Registered Security Exchange Name Weighted Average Amortization Period In Years Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Fair Value, Balance Sheet Grouping, Financial Statement Captions Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Reconciliation of Revenue from Segments to Consolidated Reconciliation of Revenue from Segments to Consolidated [Table Text Block] Cash flow hedges reclassified to earnings, net of tax expense of $0 and $235, respectively Cash flow hedges reclassified to earnings Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Valuation allowance for deferred tax assets SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member] Cash and cash equivalents Cash and Cash Equivalents [Member] Cover [Abstract] Entity Voluntary Filers Entity Voluntary Filers Impairment charges Goodwill, Impairment Loss Income tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Percent Acquisitions Goodwill, Reduction Resulting From Acquisition Goodwill, Reduction Resulting From Acquisition Finance lease weighted-average discount rate Finance Lease, Weighted Average Discount Rate, Percent Revenue Revenue from Contract with Customer [Text Block] Segment Reporting [Abstract] Segment Reporting [Abstract] Contract assets Increase (Decrease) in Contract with Customer, Asset Changes in benefit obligation: Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company Pnc Bank N.a. Bank Of America N.a. Wells Fargo Bank N.a. Citizens Bank Of Pennsylvania And Branch Banking And Trust Company [Member] PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company [Member] Debt Instrument, Redemption, Period Two Debt Instrument, Redemption, Period Two [Member] Skratch Skratch Enterprises Ltd [Member] Skratch Enterprises Ltd Member Forecast Forecast [Member] Defined Benefit Plan, Asset Categories [Axis] Defined Benefit Plan, Plan Assets, Category [Axis] Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Discount rate (percent) Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Recognized net actuarial loss Defined Benefit Plan, Amortization of Gain (Loss) TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity Income tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Amount Goodwill and other intangibles Deferred Tax Assets, Goodwill and Intangible Assets Product warranty Standard Product Warranty, Policy [Policy Text Block] Total deferred tax assets Deferred Tax Assets, Gross Components of Income before Income Tax Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Reconciliation of Operating Profit (Loss) from Segments to Consolidated Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Accrued interest and penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Vesting [Axis] Vesting [Axis] Diluted (loss) earnings per common share (usd per share) Earnings Per Share, Diluted Acquisition consideration threshold Acquisition Consideration Threshold Acquisition Consideration Threshold Proceeds from the sale of property, plant, and equipment Proceeds from Sale of Property, Plant, and Equipment Trademarks and trade names Trademarks and Trade Names [Member] Vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Consolidation Items [Axis] Consolidation Items [Axis] Litigation settlement amount, non-current Litigation Settlement, Amount Awarded to Other Party, Non-Current Litigation Settlement, Amount Awarded to Other Party, Non-Current 2024 Lessee, Operating Lease, Liability, to be Paid, Year Two Other current assets Other Assets, Current Unrecognized tax benefit beginning of period: Balance at end of period Unrecognized Tax Benefits Net deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Equity securities Equity Securities [Member] Domestic Income (Loss) from Continuing Operations before Income Taxes, Domestic Discount rate Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Accounts Receivable, Allowance for Credit Loss Accounts Receivable, Allowance for Credit Loss [Table Text Block] Amortization Amortization Lessee, Operating Lease, Liability, Maturity Lessee, Operating Lease, Liability, Maturity [Table Text Block] Entity Address, Suite Entity Address, Address Line Two Entity Address, Street Address Entity Address, Address Line One Contract liabilities Contract with Customer, Liability Products and Services [Axis] Product and Service [Axis] Deferred tax liabilities: Deferred Tax Liabilities, Net [Abstract] Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Change in income tax rates Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent Interest expense - net Interest Expense Trademarks and trade names Trade Names [Member] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Inventory Inventory Disclosure [Text Block] Schedule of Long-term Debt Instruments Schedule of Long-Term Debt Instruments [Table Text Block] Machinery and equipment Machinery and Equipment [Member] Buildings Building [Member] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Funded status at end of year Defined Benefit Plan, Funded (Unfunded) Status of Plan Reclassification of pension liability adjustments to earnings, net of tax expense of $6 and benefit of $19, respectively* Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax Income Tax Authority, Name [Domain] Income Tax Authority, Name [Domain] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Total deferred tax liabilities Deferred Tax Liabilities, Gross Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Accrued settlement Increase Decrease In Accrued Settlement Increase Decrease In Accrued Settlement Non-compete agreements Noncompete Agreements [Member] Gross property, plant, and equipment Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Depreciation/Amortization: Depreciation, Amortization and Accretion, Net [Abstract] Dilutive potential common shares (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Long-term portion of accrued settlement (Note 18) Accrued Legal Settlement, Non-Current Accrued Legal Settlement, Non-Current Schedule II Valuation and Qualifying Accounts SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] 2027 Finite-Lived Intangible Asset, Expected Amortization, Year Five Research and development Research and Development Expense, Policy [Policy Text Block] Allowance for credit losses SEC Schedule, 12-09, Allowance, Credit Loss [Member] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Environmental Loss Contingencies Schedule of Environmental Loss Contingencies by Site [Table Text Block] Allowance for credit losses Credit Loss, Financial Instrument [Policy Text Block] Total Estimated Litigation Liability Defined benefit plan, comprehensive (income) loss Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax Tax on unremitted foreign earnings Effective Income Tax Rate Reconciliation, Unremitted Foreign Earnings, Percent Effective Income Tax Rate Reconciliation, Unremitted Foreign Earnings, Percent Retirement Benefits [Abstract] Retirement Benefits [Abstract] Statement of Stockholders' Equity [Abstract] Statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Revenue remaining performance obligation (percentage) Revenue remaining performance obligation (percentage) Revenue, Remaining Performance Obligation, Percentage CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Number of defined benefit plans Defined Benefit Plan Number Number of defined benefit plans offered by the company. Omnibus Plan and Equity and Incentive Plan Omnibus Plan and Equity and Incentive Plan [Member] Omnibus Plan and Equity and Incentive Plan Interest Finance Lease, Liability, Undiscounted Excess Amount Disposal Group Classification [Domain] Disposal Group Classification [Domain] Goodwill and long-lived assets impairment charges (Note 5) Asset impairments Asset Impairment Charges Pension and post-retirement liability Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions Accounts receivable - net (Note 6) Accounts receivable - net Accounts and Financing Receivable, after Allowance for Credit Loss, Current Disaggregation of Revenue Disaggregation of Revenue [Line Items] Environmental obligations utilized Accrual for Environmental Loss Contingencies, Payments Net loss attributable to noncontrolling interest Income (Loss) from Continuing Operations, Net of Tax, Attributable to Noncontrolling Interest