Document and Entity Information [Abstract] Document and Entity Information [Abstract] Entities [Table] Entities [Table] Class of Stock [Axis] Class of Stock [Domain] Common Stock Common Stock [Member] Common Class B Common Class B [Member] Entity Information Entity Information [Line Items] 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 Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Public Float Entity Public Float Condensed Consolidated Balance Sheet Parenthetical [Abstract] Condensed Consolidated Balance Sheet Parenthetical [Abstract] Statement [Table] Statement [Table] Class of Stock [Axis] Class of Stock [Domain] Statement Statement [Line Items] Current Assets Assets, Current [Abstract] Allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Other Assets Other Assets, Noncurrent [Abstract] Accumulated amortization Trademarks and patents TrademarksAndPatentsAccumulated Amortization The accumulated amount of amortization of the costs pertaining to the rights acquired through registration of a trademark to gain or protect exclusive use of a business name, symbol or other device or style for a projected indefinite period of benefit PLUS the accumulated amount of amortization of the costs pertaining to the exclusive legal rights granted to the owner of the patent to exploit an invention or a process for a period of time specified by law. Accumulated amortization Debt issuance costs DeferredFinanceCostAccumulatedAmortization The accumulated amount of amortization of long-term deferred finance costs capitalized. Accumulated amortization Licensing and non-compete agreements Finite-Lived Intangible Assets, Accumulated Amortization Stockholder's Equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares issued Common Stock, Shares, Issued Treasury stock, common shares Treasury Stock, Shares Condensed Consolidated Statements of Income and Retained Earnings [Abstract] Condensed Consolidated Statements of Income and Retained Earnings [Abstract] Net Sales Sales Revenue, Goods, Net Cost of Sales Cost of Goods Sold Gross Profit Gross Profit Selling, General and Administrative Expenses Selling, General and Administrative Expense Capacity Rationalization Charges Restructuring Charges Income from Operations Operating Income (Loss) Other Income (Expense) Nonoperating Income (Expense) [Abstract] Interest expense Interest Expense, Debt Interest income Investment Income, Interest Other, net Other Nonoperating Income (Expense) Total Other Income (Expense), Net Nonoperating Income (Expense) Income Before Income Taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income taxes Income Tax Expense (Benefit) Net Income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Retained Earnings Retained Earnings (Accumulated Deficit) [Abstract] Balance at beginning of period Retained Earnings (Accumulated Deficit) Cash dividends declared and treasury stock issuances Cash dividends declared and treasury stock issuances Common stock cash dividend declared by an entity during the period plus the value of treasury stock reissued during the period.. This element includes paid and unpaid dividends declared during the period. Balance at end of period Net Income Per Share Earnings Per Share [Abstract] Basic Common (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted Average Shares Outstanding Weighted Average Shares Outstanding [Abstract] Weighted Average Shares Outstanding [Abstract] Basic Common (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted STOCK-BASED COMPENSATION [Abstract] STOCK-BASED COMPENSATION [Abstract] Summary of Stock Option Transactions Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Award Type and Plan Name [Axis] Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Award Type and Plan Name [Axis] Share-based Compensation Arrangements by Share-based Payment Award, Award Type and Plan Name [Domain] Share-based Compensation Arrangements by Share-based Payment Award, Award Type and Plan Name [Domain] Share-based Compensation Arrangement by Share-based Payment Award Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Options, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Options, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Options, Outstanding, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Options, Outstanding, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Exercised, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercised, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Exercised, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value Options, Exercisable, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Exercisable, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Exercisable, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Exercisable, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Pension and Other Postretirement Benefit Expense [Abstract] Pension and Other Postretirement Benefits Disclosure Pension and Other Postretirement Benefits Disclosure [Text Block] NEW ACCOUNTING PRONOUNCEMENTS [Abstract] NEW ACCOUNTING PRONOUNCEMENTS [Abstract] New Accounting Pronouncements New Accounting Pronouncements [Text Block] Disclosure of new accounting pronouncements adopted during the period or new accounting pronouncements that have been issued but not yet adopted. Segment Reporting [Abstract] Operating Segment Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Investment in short-term securities Short-term Investments Accounts receivable, less allowance of $633 and $626 at October 31, 2012 and July 31, 2012, respectively Receivables, Net, Current Inventories Inventory, Net Deferred income taxes Deferred Tax Assets, Net, Current Prepaid repairs expense Other Prepaid Expense, Current Prepaid expenses and other assets Prepaid Expense, Current Total Current Assets Assets, Current Property, Plant and Equipment Property, Plant and Equipment, Net [Abstract] Cost Property, Plant and Equipment, Gross Less accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Total Property, Plant and Equipment, Net Property, Plant and Equipment, Net Goodwill Goodwill Trademarks and patents, net of accumulated amortization of $407 and $409 at October 31, 2012 and July 31, 2012, respectively Intangible Assets, Net (Excluding Goodwill) Debt issuance costs, net of accumulated amortization of $398 and $380 at October 31, 2012 and July 31 2012, respectively Deferred Finance Costs, Noncurrent, Net Licensing agreements and non-compete agreements, net of accumulated amortization of $1,674 and $1,611 at October 31, 2012 and July 31, 2012, respectively Finite-Lived Intangible Assets, Net Deferred income taxes Deferred Tax Assets, Net, Noncurrent Other Other Assets, Noncurrent Total Other Assets Assets, Noncurrent Total Assets Assets LIABILITIES & STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Current Liabilities Liabilities, Current [Abstract] Current maturities of notes payable Senior Notes, Current Accounts payable Accounts Payable and Accrued Liabilities, Current Dividends payable Dividends Payable, Current Accrued expenses: Accrued Liabilities, Current [Abstract] Salaries, wages and commissions Employee-related Liabilities, Current Trade promotions and advertising Accrued Marketing Costs, Current Freight Accrued Liabilities, Current Other Other Liabilities, Current Total Current Liabilities Liabilities, Current Noncurrent Liabilities Liabilities, Noncurrent [Abstract] Notes payable Senior Notes, Noncurrent Deferred compensation Deferred Compensation Liability, Classified, Noncurrent Pension and postretirement benefits Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent Other Other Liabilities, Noncurrent Total Noncurrent Liabilities Liabilities, Noncurrent Total Liabilities Liabilities Stockholders’ Equity Common Stock, par value $.10 per share Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Restricted unearned stock compensation Deferred Compensation Equity Retained earnings Accumulated Other Comprehensive Income: Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized gain on marketable securities Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Pension and postretirement benefits Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax Cumulative translation adjustment Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Less Treasury Stock, at cost (2,911,961 Common and 324,741 Class B shares at October 31, 2012 and 2,911,564 Common and 324,741 Class B shares at July 31, 2012) Treasury Stock, Value Total Stockholders’ Equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total Liabilities & Stockholders’ Equity Liabilities and Equity CAPACITY RATIONALIZATION CHARGES [Abstract] CAPACITY RATIONALIZATION CHARGES [Abstract] Schedule of Restructuring and Related Costs Schedule of Restructuring and Related Costs [Table Text Block] Stock-based Compensation Policy Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Inventory Disclosure [Abstract] Inventory Disclosure Inventory Disclosure [Text Block] Operating Segment Disclosure Segment Reporting Disclosure [Text Block] BASIS OF STATEMENT PRESENTATION [Abstract] BASIS OF STATEMENT PRESENTATION [Abstract] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Selling, General and Administrative Expenses Selling, General and Administrative Expenses, Policy [Policy Text Block] Trade Receivable Trade and Other Accounts Receivable, Policy [Policy Text Block] Overburden Removal and Mining Costs Overburden Removal and Mining Costs [Policy Text Block] Description of accounting policy for overburden removal/stripping costs for mined properties and other mining-related costs. Reclamation Asset Retirement Obligations, Policy [Policy Text Block] PENSION AND OTHER POSTRETIREMENT BENEFITS [Abstract] PENSION AND OTHER POSTRETIREMENT BENEFITS [Abstract] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Pension Plan Pension Plans, Defined Benefit [Member] Postretirement Health Plan Other Postretirement Benefit Plans, Defined Benefit [Member] Defined Benefit Plans and Other Postretirement Benefit Plans Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Service Cost Defined Benefit Plan, Service Cost Interest Cost Defined Benefit Plan, Interest Cost Expected return on plan assets Defined Benefit Plan, Expected Return on Plan Assets Amortization of Net transition obligation Defined Benefit Plan, Amortization of Transition Obligations (Assets) Amortization of Prior service costs Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Amortization of Other actuarial loss Defined Benefit Plan, Amortization of Gains (Losses) Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost Subsequent Event [Abstract] Subsequent Event [Abstract] Subsequent Events Subsequent Events [Text Block] INVENTORIES [Abstract] INVENTORIES [Abstract] Inventories Inventory, Policy [Policy Text Block] Schedule of Net Benefit Costs Schedule of Net Benefit Costs [Table Text Block] Schedule of Assumptions Used Schedule of Assumptions Used [Table Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Statement Presentation Basis of Presentation and Significant Accounting Policies [Text Block] Fair Value Disclosures [Abstract] Fair Value Measurements Fair Value Disclosures [Text Block] FAIR VALUE MEASUREMENTS [Abstract] FAIR VALUE MEASUREMENTS [Abstract] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Cash equivalents Cash Equivalents, Fair Value Disclosure Fair value of cash equivalents, excluding items classified as marketable securities, including short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Marketable equity securities Marketable Equity Securities, Noncurrent, Fair Value Disclosure The fair value of marketable equity securities available for sale that are intended to be held long-term. Cash surrender value of life insurance Cash Surrender Value, Fair Value Disclosure Inventories Schedule of Inventory, Current [Table Text Block] Condensed Consolidated Statements of Comprehensive Income [Abstract] Condensed Consolidated Statements of Comprehensive Income [Abstract] Statement, Scenario [Axis] Statement, Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Net Income Other Comprehensive Income (net of tax): Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized gain (loss) on marketable securities Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Pension and postretirement benefits Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Cumulative translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Total Comprehensive Income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Capacity Rationalization Charges Restructuring and Related Activities Disclosure [Text Block] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Restructuring Cost and Reserve [Axis] Restructuring Cost and Reserve [Axis] Type of Restructuring Type of Restructuring [Domain]