Document and Entity Information [Abstract] Document and entity information. Assets Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Accounts Receivable, Net, Current Total accounts receivable, net Accounts receivable, net Due from Related Parties, Current Accounts receivable, due from related parties Income taxes receivable Income Taxes Receivable, Current Inventory, Net Total inventories, net Total inventories, net Inventories, net Deferred tax assets Deferred Tax Assets, Net, Current Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Assets, Current, Total Total current assets Property, Plant and Equipment, Net Total property, plant and equipment Property, plant and equipment, net Deferred debt issuance costs Deferred Finance Costs, Noncurrent, Net Interest Due from Related Parties Noncurrent Interest receivable, due from related parties Interest receivable, due from related parties. Goodwill Goodwill related to business acquisition Goodwill Total investments in and loans to joint ventures Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Other Assets, Noncurrent Other assets Total Consolidated assets Assets, Total Total assets Liabilities and Stockholders' Equity Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Due to Related Parties, Current Accounts payable, due to ARL Accounts payable, due to related parties Accrued expenses and taxes Accrued Liabilities, Current Accrued compensation Employee-related Liabilities, Current Interest Payable, Current The outstanding interest amount on ARI component Accrued interest expense Liabilities, Current, Total Total current liabilities Senior unsecured notes Senior Notes, Noncurrent Deferred tax liability Deferred Tax Liabilities, Noncurrent Pension and post-retirement liabilities Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent Other Liabilities, Noncurrent Other liabilities Liabilities, Total Total liabilities Commitments and contingencies Commitments and Contingencies Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Common Stock, Value, Issued Common stock, $0.01 par value, 50,000,000 shares authorized, 21,352,297 shares issued and outstanding as of both June 30, 2012 and December 31, 2011 Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Additional Paid in Capital, Common Stock Additional paid-in capital Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Stockholders' Equity Attributable to Parent, Total Total stockholders' equity Liabilities and Equity, Total Total liabilities and stockholders' equity Revenues: Revenue, Net [Abstract] Sales Revenue, Goods, Net Manufacturing (including revenues from affiliates of $10,897 and $0 for the three months ended June 30, 2012 and 2011, respectively; $10,897 and $ 1,221 for the six months ended June 30, 2012 and 2011, respectively) Sales Revenue, Services, Net Railcar services (including revenues from affiliates of $5,832 and $6,596 for the three months ended June 30, 2012 and 2011, respectively; $11,003 and $12,133 for the six months ended June 30, 2012 and 2011, respectively) Revenues from Affiliates Included in Railcar Services Total Service Revenue from ARL Revenues from affiliates included in Railcar services Revenues from affiliates included in Railcar services. Total revenues Revenue, Net, Total Cost of revenues: Cost of Revenue [Abstract] Manufacturing Cost of Goods Sold Cost of Goods Sold Cost of Services Railcar services Cost of Revenue, Total Total cost of revenues Gross Profit Gross profit Related Party Transaction, Expenses from Transactions with Related Party Selling, general and administrative and other costs to related party Operating Income (Loss) Earnings from operations Investment Income, Interest Interest income (including income from related parties of $729 and $705 for the three months ended June 30, 2012 and 2011, respectively; $1,474 and $1,384 for the six months ended June 30, 2012 and 2011, respectively) Interest Income from Related Parties Interest income from related parties Interest income from related parties. Interest Expense Interest expense Other Nonoperating Income Other income (including income from a related party of $3 for both the three months ended June 30, 2012 and 2011; $6 and $7 for six months ended June 30, 2012 and 2011, respectively) Other Income from Related Parties Other income from a related party Other income from a related party. Income (Loss) from Equity Method Investments (Earnings) loss from joint ventures Earnings (loss) from joint ventures Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Earnings(loss) before income taxes Income Tax Expense (Benefit) Income tax (expense) benefit Net Income (Loss) Attributable to Parent Net earnings (loss) Net earnings (loss) Net earnings (loss) per common share - basic and diluted Earnings Per Share, Basic and Diluted Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net earnings (loss) to net cash provided by (used in) operating activities: Depreciation Depreciation expense Depreciation Amortization of deferred costs Amortization of Financing Costs Gain (Loss) on Disposition of Property (Gain) loss on disposal of property, plant and equipment Share-based Compensation Compensation expense Stock-based compensation Increase Decrease Interest Due from Related Parties Change in interest receivable, due from related parties Change in interest receivable, due from related parties. Deferred Income Tax Expense (Benefit) Provision (benefit) for deferred income taxes Provision Recovery for Doubtful Accounts Receivable Adjustment to provision for losses on accounts receivable (Recovery) provision for doubtful accounts receivable. Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Increase (Decrease) in Accounts Receivable Accounts receivable, net Increase (Decrease) in Accounts Receivable, Related Parties Accounts receivable, due from related parties Increase (Decrease) in Income Taxes Receivable Income taxes receivable Increase (Decrease) in Inventories Inventories, net Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Accounts payable Increase (Decrease) in Accounts Payable, Trade Accounts payable, due to related parties Increase (Decrease) in Accounts Payable, Related Parties Accrued expenses and taxes Increase (Decrease) in Accrued Liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Other Net Cash Provided by (Used in) Operating Activities Net cash provided by (used in) operating activities Investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Payments to Acquire Productive Assets Purchases of property, plant and equipment Proceeds from the sale of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment Payments to Acquire Interest in Joint Venture Investments in and loans to joint ventures Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from Stock Options Exercised Proceeds from stock option exercises Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Effect of Exchange Rate on Cash and Cash Equivalents Effect of exchange rate changes on cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Decrease in cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Description of the Business Business Description and Basis of Presentation [Text Block] Description of the Business/Summary of Accounting Policies [Abstract] Summary of Accounting Policies Significant Accounting Policies [Text Block] Fair Value Measurements Fair Value Disclosures [Text Block] Fair Value Measurements [Abstract] Inventories Inventory Disclosure [Text Block] Inventories [Abstract] Property, Plant and Equipment Property, Plant and Equipment Disclosure [Text Block] Property, Plant and Equipment [Abstract] Goodwill Goodwill Disclosure [Text Block] Goodwill [Abstract] Investments in and Loans to Joint Ventures Equity Method Investments Disclosure [Text Block] Investments in and Loans to Joint Ventures [Abstract] Warranties Product Warranty Disclosure [Text Block] Warranties/Commitments and Contingencies [Abstract] Long-term Debt Long-term Debt [Text Block] Long-term Debt [Abstract] Income Taxes Income Tax Disclosure [Text Block] Income Taxes [Abstract] Employee Benefit Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Employee Benefit Plans [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Earnings (Loss) per Share Earnings Per Share [Text Block] Earnings (Loss) per Share [Abstract] Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation [Abstract] Related Party Transactions Related Party Transactions Disclosure [Text Block] Related Party Transactions [Abstract] Segment Reporting Disclosure [Text Block] Operating Segment and Sales and Credit Concentrations Operating Segment and Sales and Credit Concentrations [Abstract] Consulting Contracts [Abstract] Consulting contracts. Supplemental Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] Supplemental Cash Flow Information [Abstract] Subsequent Events Subsequent Events [Text Block] Subsequent Events [Abstract] Amendment Flag Current Fiscal Year End Date Document Period End Date Document Type Entity Central Index Key Entity Common Stock, Shares Outstanding Entity Filer Category Entity Registrant Name Document Fiscal Period Focus Document Fiscal Year Focus Condensed Consolidated Balance Sheets [Abstract] Condensed Consolidated Statements of Operations [Abstract] Condensed Consolidated Statements of Cash Flows [Abstract] Schedule of Inventory, Current [Table Text Block] Schedule of Inventories Inventory, Raw Materials Raw materials Inventory, Work in Process Work-in-process Inventory, Finished Goods Finished products Inventory, Gross Total inventories Inventory Valuation Reserves Less reserves Building [Member] Buildings [Member] Machinery and Equipment [Member] Machinery and equipment [Member] Property, Plant and Equipment, Gross Property, plant and equipment, gross Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less accumulated depreciation Property, Plant and Equipment, Net [Abstract] Components of property, plant and equipment Property Plant and Equipment (Textual) [Abstract] Property, Plant and Equipment (Textual) [Abstract] Property plant and equipment. Schedule of Inventories Inventory, Net [Abstract] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment by Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment [Line Items] Goodwill (Textual) [Abstract] Goodwill (Textual) [Abstract] Goodwill. Loss on investments in and loans to joint ventures Maximum exposure to loss by joint venture. Maximum Exposure To Loss By Joint Venture [Table Text Block] Maximum exposure to loss by joint venture. Ohio Castings [Member] Ohio Castings [Member] Ohio Castings. Axis [Member] Axis [Member] Axis. Amtek Railcar [Member] Amtek Railcar -India [Member] Amtek Railcar. Schedule of Equity Method Investments [Table] Schedule of Equity Method Investment, Equity Method Investee, Name [Axis] Equity Method Investee, Name [Domain] Schedule of Equity Method Investments [Line Items] Schedule of Product Warranty Liability [Table Text Block] Change in the Company's warranty reserve Standard Product Warranty Accrual Liability, End of period Liability, beginning of period Standard Product Warranty Accrual, Warranties Issued Provision for warranties issued during the year, net of adjustments Movement in Standard Product Warranty Accrual [Roll Forward] Change in the Company's warranty reserve Warranties (Textual) [Abstract] Warranties (Textual) [Abstract] Warranties. Long Term Debt (Textual) [Abstract] Long-term Debt (Textual) [Abstract] Long-term debt. Debt Instrument, Face Amount Registered notes unsecured senior notes Pension Plans, Defined Benefit [Member] Pension Benefits [Member] Other Postretirement Benefit Plans, Defined Benefit [Member] Postretirement Benefits [Member] Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] Components of net periodic benefit cost for the pension and postretirement plans Defined Benefit Plan, Service Cost Service cost Defined Benefit Plan, Interest Cost Interest cost Defined Benefit Plan, Amortization of Gains (Losses) Amortization of loss Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Amortization of prior service cost Defined Benefit Plan, Net Periodic Benefit Cost Net periodic loss recognized Employee Benefit Plans (Textual) [Abstract] Employee Benefit Plans (Textual) [Abstract] Employee benefit plans. Decrease to the postretirement benefit liability Decrease to the postretirement benefit liability Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Defined Benefit Plan Disclosure [Line Items] Commitments and Contingencies (Textual) [Abstract] Commitments and Contingencies (Textual) [Abstract] Commitments and Contingencies. Percentage of Loan Commitment Funded by Party Company's Interest in credit facility, Ohio Castings Percentage of loan commitment funded by ARI Component Percentage of loan commitment funded by party. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income (loss) Results of Operations, Income before Income Taxes [Abstract] Summary of financial results of investee company Basic and Diluted Earnings Loss Per Common Share [Abstract] Computation of the Company's basic and diluted earnings (loss) per common share Basic and diluted earnings (loss) per common share. Weighted average common shares outstanding - basic Weighted Average Number of Shares Outstanding, Basic Incremental Common Shares Attributable to Share-based Payment Arrangements Dilutive effect of employee stock options Weighted average common shares outstanding - diluted Weighted Average Number of Shares Outstanding, Diluted Earnings Per Share (Textual) [Abstract] Earnings per share. Earnings Per Share (Textual) [Abstract] Manufacturing Operations [Member] Cost of revenues: Manufacturing [Member] Manufacturing operations. Railcar Services [Member] Railcar Services [Member] Cost of revenues: Railcar Services [Member] Railcar services. Schedule of Stock-Based Compensation Expense Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity [Table Text Block] Assumptions used in the Black-Scholes option-pricing model for determination of fair value of all unexercised SARs Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Stock Options Exercised Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Allocated Share-based Compensation Expense Total stock-based compensation expense (income) Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Share-based Compensation Arrangements by Share-based Payment Award, Award Type and Plan Name [Domain] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Related Party Transactions (Textual) [Abstract] Related Party Transactions (Textual) [Abstract] Related party transactions. Supplemental Cash Flow Information (Textual) [Abstract] Supplemental Cash Flow Information (Textual) [Abstract] Supplemental cash flow information. Proceeds from Interest Received Interest income received Income Taxes Paid, Net Income taxes paid Consulting Contracts (Textual) [Abstract] Consulting Contracts (Textual) [Abstract] Consulting Contracts. Unbilled Receivables, Current Unbilled revenue Operating Segments [Member] Manufacturing [Member] Intersegment: Revenues Segment Reporting Information, Intersegment Revenue Segments internal financial reports Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table] Statement, Business Segments [Axis] Segment [Domain] Segment Reporting Information [Line Items] Reconciliation of Assets from Segment to Consolidated [Table] Segment Reporting, Asset Reconciling Item [Line Items] Investments in and Loans to Joint Ventures (Textual) [Abstract] Investments in and Loans to Joint Ventures (Textual) [Abstract] Investments in and Loans to Joint Ventures. Equity Contributions Equity contributions Equity contributions. Property, Plant and Equipment [Table Text Block] Components of property, plant and equipment Percentage of Revenue from Affiliates Percentage of revenue from affiliates Percentage of revenue from affiliates. Joint Venturet Entity Loans Accrued Interest Receivable And Accrued Unused Line Fee Loans, accrued interest receivable and accrued unused line fee Variable interest entity entity loans accrued interest receivable and accrued unused line fee. Equity Method Investment Summarized Financial Information Profit Loss Before Interest Earnings (loss) before interest Equity method investment summarized financial information profit loss before interest. Equity Method Investment, Summarized Financial Information, Revenue Revenues Equity Method Investment, Summarized Financial Information, Gross Profit (Loss) Gross profit (loss) Equity Method Investment, Summarized Financial Information, Net Income (Loss) Net earnings (loss) Axis Credit Agreement [Member] Axis Credit Agreement [Member] Axis credit agreement member. Debt Instrument Basis Spread on Variable Rate for Prime Rate LIBOR based loans interest rate Debt instrument basis spread on variable rate for prime rate. Debt Instrument [Axis] Debt Instrument, Name [Domain] Line of Credit Facility [Axis] Line of Credit Facility, Lender [Domain] Line of Credit [Member] Line of Credit [Member] Line of Credit Facility, Maximum Borrowing Capacity Aggregate loan amount Debt Instrument, Interest Rate, Stated Percentage Fixed interest rate of the note which are due in 2014 Debt Instrument, Basis Spread on Variable Rate Prime rate plus Schedule of Related Party Transactions, by Related Party [Table] Related Party Transactions, by Related Party [Axis] Related Party [Domain] Related Party Transaction [Line Items] Schedule of Weighted Average Number of Shares [Table Text Block] Computation of the Company's basic and diluted earnings (loss) per common share Percentage of Loan Sharing by Each Party Acquiring loan Interest rate by each party Percentage of loan sharing by each party. Long Term Commitment Commitment under term loan Long term commitment. Line of Credit Commitment Commitment under revolving loan Line of credit commitment. Defined Benefit Plan Net Periodic Benefit Cost in Pension and Other Postretirement Benefit Contributions Total net periodic benefit cost recognized for all plans Defined benefit plan net periodic benefit cost in pension and other postretirement benefit. Components of net periodic benefit cost for the pension and postretirement plans Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block] Percentage of Redemption Price of Principal Amount Percentage of redemption price from principal amount Percentage of redemption price of principal amount. Standard Warranty Period Maximum for Parts and Services Standard warranty for parts and services Standard warranty period maximum for parts and services. General and Administrative Expense and Other [Member] Selling, general and administrative [Member] General and administrative expense and other. Fair value of the Notes Notes Payable, Fair Value Disclosure Notes due Debt Instrument, Maturity Date Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Purchase of common stock, options Technology Services Revenue Revenues under consulting agreements Interest Paid, Net Interest expense paid Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Assumptions used in the Black-Scholes option-pricing model for determination of fair value of all unexercised SARs Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Expected dividend yield Maximum [Member] Maximum [Member] Minimum [Member] Minimum [Member] Range [Axis] Range [Domain] Schedule of Share-based Compensation, Stock Appreciation Rights Award Activity [Table Text Block] Analysis of SARs granted Stock-based Compensation (Textual) [Abstract] Stock Based Compensation (Textual) [Abstract] Stock-based compensation. Common Stock, Capital Shares Reserved for Future Issuance Shares available for issuance Future Grants SAR Two Thousand Eleven Grant [Member] 2011 Grant [Member] SARs two thousand eleven grant. SAR Two Thousand Nine Grant [Member] 2009 Grant [Member] SARs two thousand nine grant. SAR Two Thousand Seven Grant [Member] 2007 Grant [Member] SARs two thousand seven grant. Stock Options [Member] Stock Options [Member] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Expected volatility for SARs, Minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Expected volatility for SARs, Maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected volatility for SARs Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Risk-free interest rate, Minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Risk-free interest rate, Maximum Maximum Exposure to Loss by Joint Venture [Abstract] Loss on investments in and loans to joint ventures Maximum exposure to loss by joint venture. Segment Reporting Information, Profit (Loss) [Abstract] Segments internal financial reports Segment Reporting (Textual) [Abstract] Operating Segment and Sales Credit Concentrations (Textual) [Abstract] Segment reporting. Percentage of Receivables from Most Significant Customer Due from Related Parties Percentage of receivables from most significant customer of total consolidated accounts receivable including due from related parties Percentage of receivables from most significant customer of total consolidated accounts receivable including due from related parties. ACF Affiliated Entity of Principal Owner [Member] ACF Affiliated Entity of Principal Owner [Member] ACF affiliated entity of principal owner. Other Related Party [Member] Other related party. Other Related Party [Member] Manufacturing Services Agreement [Member] Manufacturing services agreement. Manufacturing Services Agreement [Member] Rail Car Service Agreement [Member] Railcar Service and Fleet Services Agreement [Member] Rail car service agreement. Railcar Order [Member] Railcar Orders [Member] Railcar order. Term Loan [Member] Term loan. Term Loan [Member] Revolving Credit [Member] Revolving credit. Revolving Credit [Member] Long Term Purchase Agreement Time Period Railcar service Agreement term Years Long term purchase agreement time period. Agreement Termination Notice Period Notice Period for termination of Agreement Days Agreement termination notice period. Agreement Termination Fee Agreement Termination fee Agreement termination fee. Renegotiated Receivable with Imputed Interest Face Amount Promissory Note Renegotiated Amount, Ohio Castings Renegotiated receivable with imputed interest face amount. Renegotiated Receivable with Imputed Interest Due Dates Renegotiated promissory note due date, Ohio Castings Renegotiated receivable with imputed interest due dates. Renegotiated Receivable with Imputed Interest Interest Part Due Dates Renegotiated promissory note interest payments due, Ohio Castings Renegotiated receivable with imputed interest interest part due dates. Lease Agreement Term Term of property lease agreement years Lease agreement term. Lease Commencement Date Lease commencement date Lease commencement date. Instrument [Axis] Instrument Type [Domain] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Property, Plant and Equipment, Other Types [Member] ARI Headquarters [Member] Term Loan and Credit Agreement [Member] Term loan and credit agreement member. Term Loan and Credit Agreement [Member] Acquisition of Interest Acquisition of interest. Acquisition of interest Long Term Purchase Commitment Additional Time Period Railcar service agreement additional term years Long term purchase commitment additional time period. Mw Recycling [Member] Mw recycling. M.W. Recycling [Member] Number of Joint Ventures Number of joint ventures. Number of joint ventures Selling, General and Administrative Expense Selling, general and administrative (including costs to a related party of $149 and $145 for the three months ended June 30, 2012 and 2011, respectively; $295 and $291 for the six months ended June 30, 2012 and 2011, respectively) Total fees paid to ARL under agreement Revenues from Affiliates Included in Manufacturing Revenue for railcars sold to ARL Revenues from affiliates included in manufacturing operations Revenues from affiliates included in manufacturing. Long-term Contracts or Programs Disclosure [Text Block] Consulting Contracts Schedule of Equity Method Investments [Table Text Block] Carrying amount of investments in and loans to joint ventures Equity Method Investments Investment Equity Method Investment, Ownership Percentage Ownership Interest Notes Receivable, Related Parties, Noncurrent Loan amount outstanding due to ARI Component Notes receivable Interest Receivable Related Party Accrued interest on note Interest receivable related party. Accrued Interest on Loan Related Party Accrued interest on note Accrued interest on loan due to ARI Component Accrued interest on loan related party. Product Warranty Accrual, Preexisting, Increase (Decrease) Adjustments for warranties issued during the previous years, net of adjustments Product Warranty Accrual, Payments Warranty claims Defined Benefit Plan, Expected Return on Plan Assets Expected loss on plan assets Remaining Commitments on Loan ARI Components share, remaining commitment on loans Loan outstanding commitment funded by ARI Component Remaining commitments on loan. Share-based Compensation Arrangement by Share-based Payment Award Non Option Equity Instruments Grant Date Grant date Share based compensation arrangement by share based payment award non option equity instruments grant date. Share-based Compensation Arrangement by Share-based Payment Award Non Option Equity Instruments Outstanding Weighted Average Exercise Price Weighted average exercise price Share based compensation arrangement by share based payment award non option equity instruments outstanding weighted average exercise price. Revenue from Related Parties Scrap Material sold to MW Recycling External: Revenues Revenues Maximum Percentage of Consolidated Accounts Receivable Reported Percentage of total consolidated accounts receivable Maximum percentage of consolidated accounts receivable reported. Contracts Revenue Technology consulting contract price Employee Service Share-based Compensation, Cash Flow Effect, Cash Used to Settle Awards Employees related to SARs exercises Remaining Commitment on Loan Loan outstanding commitment funded by ARI Component Remaining commitment on loan. Number of Reportable Segments Number of reportable segments Weighted Average Number of Shares Outstanding, Basic and Diluted Weighted average common shares outstanding - basic and diluted Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected SARs lives (in years) Stock Options expiry date Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date Expiration dates Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Vesting period Operating Leases, Income Statement, Lease Revenue Railcar leasing Other Comprehensive Income Amortization of Postretirement Adjustment Net of Tax Amortization of postretirement adjustment Other comprehensive income amortization of postretirement adjustment net of tax. Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Currency translation adjustment Condensed Consolidated Statements of Comprehensive Income (Loss) [Abstract] Payments to Acquire Equipment on Lease Capital expenditures - leased railcars Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Accounts Receivable, net Accounts Receivable, net [Abstract] Reclassification, Policy [Policy Text Block] Reclassifications Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Summary of accounts receivable, net Accounts Receivable, Gross, Current Accounts receivable, gross Allowance for Doubtful Accounts Receivable, Current Less allowance for doubtful accounts Accounts Receivable, Net, Current [Abstract] Summary of accounts receivable, net Operating Leases, Future Minimum Payments Receivable [Abstract] Summary of future contractual minimum rental revenues required under non-cancellable operating leases for railcars Operating Leases, Future Minimum Payments Receivable, Current 2013 Operating Leases, Future Minimum Payments Receivable, in Two Years 2014 Operating Leases, Future Minimum Payments Receivable, in Three Years 2015 Operating Leases, Future Minimum Payments Receivable, in Four Years 2016 Operating Leases, Future Minimum Payments Receivable, in Five Years 2017 Operating Leases, Future Minimum Payments Receivable, Thereafter 2018 and thereafter Total Operating Leases, Future Minimum Payments Receivable Land [Member] Land [Member] Construction in Progress [Member] Construction in process [Member] SAR Two Thousand Twelve Grant [Member] 2012 Grant [Member] SARs two thousand twelve grant. Railcar Management Agreement [Member] Railcar management agreement [Member] Railcar management agreement. Railcar Leasing [Member] Railcar Leasing: [Member] Railcar leasing. External Operating Income Loss External: Earnings (Loss) from Operations External operating income loss. Intersegment Operating Income Loss Intersegment: Earnings (Loss) from Operations Intersegment operating income loss. Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Goodwill Operating or Corporate Segments [Member] Operations/Corporate: [Member] Operating or corporate segments. Operating Leases Future Minimum Payments Receivable Remainder of Fiscal Year Remaining 2012 Operating leases future minimum payments receivable remainder of fiscal year. Operating Leases, Income Statement, Depreciation Expense on Property Subject to or Held-for-lease Depreciation expense for leased railcars SAR Two Thousand Ten Grant [Member] 2010 Grant [Member] SAR two thousand ten grant. SAR Two Thousand Eight Grant [Member] 2008 Grant [Member] SARs two thousand eight grant. Stock Appreciation Rights (SARs) [Member] SARs outstanding [Member] Plan Type [Axis] Plan type. Plan Type [Domain] Plan type. Award Type [Axis] Lease Base Rent of Leases of Parts Manufacturing Facilities Lease base rent Lease base rent of leases of parts manufacturing facilities. Annual Director Fee Annual director fee Annual director fee. Corporate [Member] Corporate [Member] Intersegment Elimination [Member] Eliminations [Member] Stock Appreciation Grant [Member] Stock Appreciation Grant [Member] Stock appreciation grant. Direct Costs of Leased and Rented Property or Equipment Railcar leasing New Accounting Pronouncements, Policy [Policy Text Block] Recent accounting pronouncements Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Summary of future contractual minimum rental revenues required under non-cancellable operating leases for railcars Summary of Financial Results of Investee Company [Table Text Block] Summary of financial results of investee company Summary of financial results of investee company. Equity Method Investment, Financial Statement, Reported Amounts [Abstract] Carrying amount of investments in and loans to joint ventures Joint Venture Entity Loans Accrued Interest Receivable and Accrued Unused Line Fee Total maximum exposure to loss due to joint ventures Joint venture entity loans accrued interest receivable and accrued unused line fee. Joint Venture Entity Note and Accrued Interest Receivable Accrued interest receivable Joint venture entity note and accrued interest receivable. Standard Warranty Period Maximum for Railcars Standard warranty period maximum for railcars. Standard warranty for new railcars Defined Contribution Plan, Employer Discretionary Contribution Amount Expenses related to employee earnings with discretionary contributions Employee Service Share-based Compensation, Aggregate Disclosures [Abstract] Stock-based compensation expense (income) Share-based Compensation Arrangement by Share-based Payment Award Equity Instruments Other than Options Outstanding SARs outstanding Share based compensation arrangement by share based payment award equity instruments other than options outstanding. Share-based Compensation Arrangement by Share-based Payment Award Equity Instruments Other than Options Vested and Exercisable Share based compensation arrangement by share based payment award equity instruments other than options vested and exercisable. Vested and exercisable Share-based Compensation Arrangement by Share-based Payment Award Option Vesting Period Share based compensation arrangement by share based payment award option vesting period. Stock Options Vesting date Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Stock options outstanding Share-based Compensation Arrangement by Share-based Payment Award Sars Granted SAR Granted Share based compensation arrangement by share based payment award SARs granted. Analysis of Sars Granted [Abstract] Analysis of SAR's granted Analysis of SARs granted. Share-based Compensation Arrangement by Share-based Payment Award Sars Equal Vesting Increment Equal vesting increments after each subsequent Share based compensation arrangement by share based payment award SARs equal vesting increment. Related Party Transaction, Amounts of Transaction Ohio Castings amount loaned under a promissory note Related Party Transaction, Date Original due date loan under promissory note, Ohio Castings Related Party Transaction, Rate Interest rate, Ohio Castings Related Party Transaction, Due from (to) Related Party Accounts receivable to related parties Entity-Wide Revenue, Major Customer, Percentage Percentage of revenue from significant customer Maximum Percentage of Consolidated Revenue Reported Maximum percentage of accountability to total consolidated revenue Maximum percentage of consolidated revenue reported. Income Taxes (Textual) [Abstract] Income taxes. Income Taxes (Textual) [Abstract] Operating Loss Carryforwards Federal loss carryback claim Fixed Charge Coverage Ratio Fixed charge coverage ratio Fixed Charge Coverage Ratio. Schedule of Long-term Debt Instruments [Table] Debt Instrument [Line Items] Investments in and Loans to Joint Ventures (Additional Textual) [Abstract] Investments in and loans to joint ventures. Investments in and Loans to Joint Ventures (Additional Textual) [Abstract] Percentage of Interest Acquired by Each Party in Loan Percentage of interest acquired by each party in loan. Percentage of interest acquired by each party in loan Percentage of Loan Commitment Funded by Parent Company Percentage of loan commitment funded by parent company Percentage of loan commitment funded by parent company. Long Term Debt (Additional Textual) [Abstract] Long-term debt. Long-term Debt (Additional Textual) [Abstract] Share-based Compensation Arrangement by Share-based Payment Award Sars Granted on Basis of Specified Earnings SAR Granted on Basis of Specified earnings Share based compensation arrangement by share based payment award SARs granted on the basis of specified earnings. Share Based Compensation Arrangement by Share Based Payment Award Options Exercises Intrinsic Value Total intrinsic value Share-based Compensation Arrangement by Share-based Payment Award Options Exercises Intrinsic Value. Ventures [Member] Ventures. Co-Ventures [Member] Related party transaction amounts of transaction inventory Related party transaction amounts of transaction inventory.