Debt Disclosure [Abstract] Initial borrowing capacity Line of Credit Facility, Current Borrowing Capacity Minimum excess borrowing availability with no financial covenant restrictions Line of Credit Facility, Minimum Excess Borrowing Availability With No Financial Covenant Restrictions Line of Credit Facility, Minimum Excess Borrowing Availability With No Financial Covenant Restrictions Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Unused line fee Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Basis spread on interest rate Debt Instrument, Basis Spread on Variable Rate Maximum repurchased stock and dividends with no financial covenant restrictions Line of Credit Facility Maximum Amount of Repurchased Company Stock or Dividends Within Twelve Months With No Financial Covenant Restrictions Line of credit facility maximum amount of repurchased company stock or dividends within twelve months with no financial covenant restrictions Commitments and Contingencies Disclosure [Abstract] Schedule of Repurchase Agreements [Table Text Block] Schedule of Repurchase Agreements [Table Text Block] Compensation and Retirement Disclosure [Abstract] Interest cost Defined Benefit Plan, Interest Cost Service cost Defined Benefit Plan, Service Cost Amortization of prior service benfit Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Amortization of net actuarial loss Defined Benefit Plan, Amortization of Gains (Losses) Net periodic postretirement benefit income Defined Benefit Plan, Net Periodic Benefit Cost Payments for postretirement health care Defined Benefit Plan, Benefits Paid Schedule of Amounts Recognized in Balance Sheet [Table Text Block] Schedule of Amounts Recognized in Balance Sheet [Table Text Block] Schedule of Postretirement Plan Amendments [Table Text Block] Schedule of Postretirement Plan Amendments [Table Text Block] Schedule of Postretirement Plan Amendments [Table Text Block] Schedule of Net Benefit Costs [Table Text Block] Schedule of Net Benefit Costs [Table Text Block] Product Warranties Disclosures [Abstract] Product Liability Contingency [Table] Product Liability Contingency [Table] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Class A, B, and C Motorhomes [Member] Class A And B And C Motorhomes [Member] Class A B C Motorhomes [Member] Class A and C Sidewalls and Floors [Member] Class A And C Sidewalls and Floors [Member] Class A and C Sidewalls and Floors [Member] Towable Products [Member] Towable Products [Member] Towable Products [Member] Product Liability Contingency [Line Items] Product Liability Contingency [Line Items] Warranty term Product Warranty Accrual, Warranty Term Product Warranty Accrual, Warranty Term Warranty distance (in miles) Product Warranty Accrual, Warranty Distance Product Warranty Accrual, Warranty Distance Earnings Per Share [Abstract] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Net Investment in Operating Leases and Operating Lease Repurchase Obligations [Abstract] Net Investment in Operating Leases and Operating Lease Repurchase Obligations [Abstract] Net Investment in Operating Leases and Operating Lease Repurchase Obligations Operating Leases of Lessor Disclosure [Text Block] Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward] Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward] Balance at beginning of period Product Warranty Accrual Provision Product Warranty Accrual, Warranties Issued Claims paid Product Warranty Accrual, Payments Balance at end of period Purchase Commitment, Excluding Long-term Commitment [Table] Purchase Commitment, Excluding Long-term Commitment [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Obligation to Repurchase from Dealers [Member] Obligation to Repurchase from Dealers [Member] Obligation to Repurchase from Dealers [Member] State Obligation to Repurchase [Member] State Obligation to Repurchase [Member] State Obligation to Repurchase [Member] Purchase Commitment, Excluding Long-term Commitment [Line Items] Purchase Commitment, Excluding Long-term Commitment [Line Items] Repurchase agreement term Loss Contingency, Repurchase Agreement Term Loss Contingency, Repurchase Agreement Term Contingent liability on repurchase agreements Loss Contingency, Estimate of Possible Loss Accrued loss on repurchases Accrued Loss on Repurchases Estimated loss reserve for purchases of products previously sold. Hypothetical percent change of repurchase assumptions Hypothetical change of repurchase assumptions (percent) A hypothetical change (in percent) of repurchase assumptions. Hypothetical change on repurchase assumptions Hypothetical change on repurchase assumptions The estimated maximum amount of possible loss from the contingency. Rental units sold to Apollo Rental units sold to Apollo Rental units sold to Apollo Rental units subject to operating lease Property Subject to or Available for Operating Lease, Number of Units Rental units released from operating lease repurchase obligation Number of rental units released from operating lease repurchase obligation Number of rental units released from operating lease repurchase obligation Operating lease revenue Operating Leases, Income Statement, Lease Revenue Deferred Revenue, by Type [Table] Deferred Revenue Arrangement, by Type [Table] Statement, Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Scenario, Forecast [Member] Scenario, Forecast [Member] Deferred Revenue [Line Items] Deferred Revenue Arrangement [Line Items] Percentage of Apollo rental units sold Percentage of Apollo rental units sold Percentage of Apollo rental units sold Inventory Disclosure [Abstract] Inventory, gross Inventory, Gross Inventory, LIFO LIFO Inventory Amount Inventory, FIFO (Towables) FIFO Inventory Amount Statement of Financial Position [Abstract] Receivables, less allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Capital stock common, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Capital stock common, shares authorized (in shares) Common Stock, Shares Authorized Capital stock common, shares issued (in shares) Common Stock, Shares, Issued Treasury stock, at cost, shares (in shares) Treasury Stock, Shares Property, Plant and Equipment [Abstract] Property, Plant and Equipment Property, Plant and Equipment Disclosure [Text Block] Stockholders' Equity Note [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Award Date [Axis] Award Date [Axis] Award Date [Domain] Award Date [Domain] October 15, 2014 Grant [Member] October 15, 2014 Grant [Member] October 15, 2014 Grant October 16, 2013 Grant [Member] October 16, 2013 Grant [Member] October 16, 2013 Grant [Member] Title of Individual [Axis] Title of Individual [Axis] Title of Individual with Relationship to Entity [Domain] Relationship to Entity [Domain] Management [Member] Management [Member] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Restricted Stock [Member] Restricted Stock [Member] Stockholders Equity [Line Items] Stockholders' Equity [Line Items] Disclosure of components of stockholders' equity which may include share-based compensation, dividends, or share repurchases. Issuance of stock (in shares) Stock Issued During Period, Shares, Share-based Compensation, Gross Stock-based compensation expense Allocated Share-based Compensation Expense Common stock, dividends, per share, cash paid Common Stock, Dividends, Per Share, Cash Paid Common stock, dividends, per share, declared Common Stock, Dividends, Per Share, Declared Contingent Liabilities and Commitments Commitments and Contingencies Disclosure [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Fair Value Disclosures [Abstract] Investments and Fair Value Measurements Fair Value Disclosures [Text Block] Accounting Policies [Abstract] Fiscal Period [Policy Text Block] Fiscal Period, Policy [Policy Text Block] New Accounting Pronouncements [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] Net income Net Income (Loss) Attributable to Parent Weighted average shares outstanding Weighted Average Number of Shares Outstanding, Basic Net income per share - basic (in dollars per share) Earnings Per Share, Basic Dilutive impact of awards and options outstanding Weighted Average Number Diluted Shares Outstanding Adjustment Weighted average shares and potential dilutive shares outstanding Weighted Average Number of Shares Outstanding, Diluted Net income per share - assuming dilution (in dollars per share) Earnings Per Share, Diluted Unrecognized tax benefits Unrecognized Tax Benefits Unrecognized tax benefits that would have an impact on effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Unrecognized tax benefits, income tax penalties and interest accrued Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] Assets Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Receivables, less allowance for doubtful accounts ($119 and $127) Accounts Receivable, Net, Current Inventories Inventory, Net Net investment in operating leases Property Subject to or Available for Operating Lease, Net Prepaid expenses and other assets Prepaid Expense and Other Assets, Current Income taxes receivable and prepaid Income Taxes Receivable and Prepaid Carrying amounts as of the balance sheet date of: payments made in advance for income and other taxes, which will be charged against earnings within one year or the normal operating cycle, if longer; and amounts from tax authorities as of the balance sheet date representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Current Total current assets Assets, Current Property, plant and equipment, net Property, Plant and Equipment, Net Investment in life insurance Life Insurance, Corporate or Bank Owned, Amount Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Goodwill Goodwill Other assets Other Assets, Noncurrent Total assets Assets Liabilities and Stockholders' Equity Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Income taxes payable Accrued Income Taxes, Current Accrued expenses: Accrued Liabilities, Current [Abstract] Accrued compensation Employee-related Liabilities, Current Operating lease repurchase obligations Operating Lease Repurchase Obligations Amount of rental RV repurchase obligation per agreement Product warranties Product Warranty Accrual, Current Self-insurance Self Insurance Reserve, Current Promotional Accrued Marketing Costs, Current Other Accrued Liabilities, Current Total current liabilities Liabilities, Current Non-current liabilities: Liabilities, Noncurrent [Abstract] Unrecognized tax benefits Liability for Uncertain Tax Positions, Noncurrent Postretirement health care and deferred compensation benefits Other Postretirement Defined Benefit Plan, Liabilities, Noncurrent Total non-current liabilities Liabilities, Noncurrent Contingent liabilities and commitments Commitments and Contingencies Stockholders' equity: Equity [Abstract] Capital stock common, par value $0.50; authorized 60,000 shares, issued 51,776 shares Common Stock, Value, Outstanding Additional paid-in capital Additional Paid in Capital Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Treasury stock, at cost (24,845 and 24,727 shares) Treasury Stock, Value Total stockholders' equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders' equity Liabilities and Equity Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock Options [Member] Employee Stock Option [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive shares Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive shares average price (in dollars per share) Antidilutive Securities Excluded from Computation of Earnings Per Share, Per Share Amount Antidilutive Securities Excluded from Computation of Earnings Per Share, Per Share Amount Dollar cap liability reduction Defined Benefit Plan, Dollar Cap Liability Reduction Defined Benefit Plan, Dollar Cap Liability Reduction Liability reduction Defined Benefit Plan, Plan Amendments Amortization period Defined Benefit Plan, Amendment Amortization Period The number of years that the Jan 2013 postretirement health care plan amendment will be amortized. Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Balance at beginning of period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Net change included in other comprehensive income Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Balance at end of period Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract] Postretirement health care benefit cost Postretirement health care benefit cost This represents the entire liability recognized in the balance sheet that is associated with the postretirement health care benefits. Non-qualified deferred compensation Non-qualified deferred compensation This represents the entire liability recognized in the balance sheet that is associated with the non-qualified deferred compensation plan. Executive share option plan liability Executive share option plan liability This represents the entire liability recognized in the balance sheet that is associated with the executive share option plans. SERP benefit liability SERP benefit liability This represents the entire liability recognized in the balance sheet that is associated with the SERP benefit plan. Executive deferred compensation Executive deferred compensation This represents the entire liability recognized in the balance sheet that is associated with the executive deferred compensation plan. Officer stock-based compensation Due to Officers or Stockholders, Noncurrent Total postretirement health care and deferred compensation benefits Pension and Other Postretirement Defined Benefit Plans, Liabilities Less current portion Pension and Other Postretirement and Postemployment Benefit Plans, Liabilities, Current Income Statement [Abstract] Net revenues Revenue, Net Cost of goods sold Cost of Goods Sold Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] Selling Selling and Marketing Expense General and administrative General and Administrative Expense Gain on sale of real estate Gain (Loss) on Disposition of Property Plant Equipment Total operating expenses Operating Expenses Operating income Operating Income (Loss) Non-operating income (expense) Other Nonoperating Income (Expense) Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Provision for taxes Income Tax Expense (Benefit) Net income Income per common share: Basic Diluted Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Diluted (in shares) Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Amortization of prior service credit (net of tax of $506, $528, $998 and $1,010) Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Amortization of net actuarial loss (net of tax of $136, $102, $258 and $201) Accumulated Other Comprehensive Income Decrease (Increase) in Actuarial Loss The decrease (increase) in actuarial loss included in accumulated other comprehensive income associated with a postretirement health plan because it has yet to be recognized as components of net periodic benefit cost. Plan amendment, net of tax of $581, $1,346, $581 and $1,346) Postretirement plan amendment, other comprehensive income (loss) Postretirement plan amendment, other comprehensive income (loss) Unrealized appreciation of investments (net of tax of $0, $0, $0 and $91) Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Total other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Employee and Retiree Benefits Pension and Other Postretirement Benefits Disclosure [Text Block] Credit Facilities Debt Disclosure [Text Block] Document and Entity Information [Abstract] Document and Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Risks and Uncertainties [Abstract] Concentration Risk [Table] Concentration Risk [Table] Major Customers [Axis] Customer [Axis] Name of Major Customer [Domain] Customer [Domain] Major Customer One [Member] Major Customer One [Member] Major Customer One [Member] Major Customer Two [Member] Major Customer Two [Member] Major Customer Two [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Sales Revenue, Goods, Net [Member] Sales Revenue, Goods, Net [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer Concentration Risk [Member] Customer Concentration Risk [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Percent of revenue Concentration Risk, Percentage Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Postretirement health care benefits age requirement before distribution occurs Defined Benefit Plan, Age Requirement Before Distribution Occurs Defined Benefit Plan, Age Requirement Before Distribution Occurs Postretirement health care benefits continuous service requirement Defined Benefit Plan, Service Requirement Defined Benefit Plan, Service Requirement Warranty Product Warranty Disclosure [Text Block] Inventory repurchased, units (in recreation vehicles) Number of units repurchased The number of units repurchased from dealers in the period. Inventory repurchased, dollars Value of units repurchased The value of inventory repurchased from dealers in the period. Inventory resold, units (in recreation vehicles) Number of repurchased units resold The number of repurchased units resold during the period. Inventory resold, cash collected Cash collected for resold repurchased units Cash collected for resold repurchased inventory during the period. Inventory resold, loss recognized Loss recognized on resold repurchased units Loss recognized on resold repurchased inventory during the period. Units in ending inventory (in recreation vehicles) Repurchased units in inventory The number of repurchased units in inventory as of the period ending date. Inventories Inventory Disclosure [Text Block] Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Accumulated Defined Benefit Plans Adjustment [Member] Accumulated Defined Benefit Plans Adjustment [Member] Accumulated Net Unrealized Investment Gain (Loss) [Member] Accumulated Net Unrealized Investment Gain (Loss) [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Balance at beginning of period Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract] Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract] OCI before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Amounts reclassified from AOCI Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Net current-period OCI Other Comprehensive Income (Loss), Net of Tax Balance at end of period Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Domestic equity funds Domestic Equity Funds Assets that fund deferred compensation consisting of domestic equity funds. International equity funds International Equity Funds Assets that fund deferred compensation consisting of international equity funds. Fixed income funds Fixed Income Funds Assets that fund deferred compensation consisting of fixed income funds. Total assets at fair value Assets, Fair Value Disclosure Concentration Risk Concentration Risk Disclosure [Text Block] Schedule of Product Warranty Liability [Table Text Block] Schedule of Product Warranty Liability [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Statement of Cash Flows [Abstract] Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Adjustments to reconcile net income to net cash used in operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization LIFO expense Inventory, LIFO Reserve, Period Charge Stock-based compensation Share-based Compensation Deferred income taxes including valuation allowance Deferred Income Tax Expense (Benefit) Postretirement benefit income and deferred compensation expense Increase (Decrease) in Deferred Compensation and Postretirement Obligation Expenses The increase (decrease) during the reporting period in the amount due to fund non-pension benefits provided to former and retired employees and the increase (decrease) in the obligation created by employee agreements whereby earned compensation will be paid in the future. Provision (benefit) for doubtful accounts Provision for Doubtful Accounts Gain on disposal of property Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Increase in cash surrender value of life insurance policies Life Insurance, Corporate or Bank Owned, Change in Value Change in assets and liabilities: Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract] Inventories Increase (Decrease) in Inventories Receivables, prepaid and other assets Increase (Decrease) in Receivables and Prepaid Assets The increase (decrease) during the reporting period in the total amount due within one year from all parties, associated with underlying transactions that are classified as operating activities; and the increase (decrease) during the reporting period in the value of prepaid expenses and other assets not separately disclosed in the statement of cash flows, for example, deferred expenses, intangible assets,or income taxes. Investment in operating leases, net of repurchase obligations Increase (Decrease) in Investment in Operating Leases, Net of Repurchase Obligations The increase (decrease) during the reporting period in net investment in operating leases. Income taxes and unrecognized tax benefits Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Postretirement and deferred compensation benefits Increase (Decrease) in Postretirement Obligations Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Proceeds from the sale of investments, at par Proceeds from Sale of Available-for-sale Securities Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Proceeds from the sale of property Proceeds from the Sale of Property The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale and from the sale of formerly productive assets held for sale. Other Payments for (Proceeds from) Other Investing Activities Net cash (used in) provided by investing activities Net Cash Provided by (Used in) Investing Activities Financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Payments for purchases of common stock Payments for Repurchase of Common Stock Payments of cash dividends Payments of Ordinary Dividends, Common Stock Proceeds from exercise of stock options Proceeds from Stock Options Exercised Borrowings on loans Proceeds from Lines of Credit Repayments of loans Repayments of Lines of Credit Other Proceeds from (Payments for) Other Financing Activities Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Net decrease in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Supplemental cash flow disclosure: Supplemental Cash Flow Information [Abstract] Income taxes paid, net of refunds Income Taxes Paid, Net Interest paid Interest Paid Earnings Per Share Earnings Per Share [Text Block] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Land [Member] Land [Member] Buildings and building improvements [Member] Building and Building Improvements [Member] Machinery and equipment [Member] Machinery and Equipment [Member] Software [Member] Software and Software Development Costs [Member] Transportation [Member] Transportation Equipment [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Total property, plant and equipment, gross Property, Plant and Equipment, Gross Less accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Total property, plant and equipment, net Investments, Debt and Equity Securities [Abstract] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Auction Rate Securities, Rate Setting Intervals [Axis] Auction Rate Securities, Rate Setting Intervals [Axis] Auction Rate Securities, Rate Setting Intervals [Axis] Auction Rate Securities, Rate Setting Intervals [Domain] Auction Rate Securities, Rate Setting Intervals [Domain] Auction Rate Securities, Rate Setting Intervals [Domain] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Statement of Comprehensive Income [Abstract] Amortization of prior service credit, tax Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), Tax Amortization of net actuarial loss, tax Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax Plan amendment, tax Other Comprehensive Income Tax Effect of Plan Amendment Tax effect of postretirment health plan amendment on other comprehensive income. Unrealized appreciation of investments, tax Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Subsequent Events [Abstract] Subsequent Event Subsequent Events [Text Block] Finished goods Inventory, Finished Goods, Gross Work-in-process Inventory, Work in Process, Gross Raw materials Inventory, Raw Materials, Net of Reserves Total LIFO reserve Inventory, LIFO Reserve Total inventories Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Amortization of prior service credit Amortization of net actuarial loss Total reclassifications Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Net of Tax Fair Value, Assets Measured on Recurring Basis [Table Text Block] Fair Value, Assets Measured on Recurring Basis [Table Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of Inventory, Current [Table Text Block] Schedule of Inventory, Current [Table Text Block] Property, Plant and Equipment [Table Text Block] Property, Plant and Equipment [Table Text Block]