Document and Entity Information Document And Entity Information [Abstract] Statement [Table] Statement [Line Items] Beginning balance Document Type Amendment Flag Document Period End Date Document Fiscal Period Focus Document Fiscal Year Focus Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Filer Category Entity Common Stock, Shares Outstanding Entity Well-known Seasoned Issuer Entity Public Float Entity Current Reporting Status Entity Voluntary Filers Consolidated Balance Sheets [Abstract] ASSETS Cash and cash equivalents Cash and cash equivalents at end of year Cash and cash equivalents at beginning of year Cash and cash equivalents Marketable securities Marketable securities Accounts Receivable, Gross, Current Accounts receivable Allowance for Doubtful Accounts Receivable, Current Allowance for Doubtful Accounts Receivable, Current, Ending Balance Allowance for Doubtful Accounts Receivable, Current, Beginning Balance Less allowance for doubtful accounts Accounts receivable, net Accounts receivable Accounts receivable, net Inventories: Finished goods Inventory, Finished Goods, Total Work in process Raw materials Inventory, Raw Materials, Total Inventory, Net Total inventory Deferred tax assets Deferred Tax Assets, Net, Current, Ending Balance Deferred Tax Assets, Net, Current, Beginning Balance Deferred Tax Assets, Net, Current, Total Other Assets Current Other current assets Total current assets Total current assets Property, Plant and Equipment, Net [Abstract] PROPERTY, PLANT AND EQUIPMENT: Land Land and land improvements Buildings and Improvements, Gross Buildings Buildings and Improvements, Gross, Total Machinery and Equipment, Gross Machinery and equipment Machinery and Equipment, Gross, Total PROPERTY, PLANT AND EQUIPMENT Property, Plant and Equipment, Gross, Ending Balance Property, Plant and Equipment, Gross, Beginning Balance Property plant and equipment gross Property plant and equipment gross Less allowance for depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance Less allowance for depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total Property, Plant and Equipment, Net Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance PROPERTY, PLANT AND EQUIPMENT, NET GOODWILL Goodwill, Ending Balance Goodwill, Beginning Balance Goodwill, Total Assets, total Total assets Liabilities Abstract LIABILITIES Accounts payable Accounts Payable, Current, Total Accrued Income Taxes Current Federal and state income taxes Accrued liabilities Accrued Liabilities, Current, Total Total current liabilities Total current liabilities DEFERRED INCOME TAXES Commitments And Contingencies 2009 COMMITMENTS AND CONTINGENCIES STOCKHOLDERS' EQUITY Common stock, $1 par value: Authorized: 12,000,000 shares Issued: 7,440,518 shares Common stock, 1 par value: Authorized:12000000 Issued: 7,440,518 shares Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common stock, $1 par value: Authorized:12,000,000 shares at December 31, 2011 and 2010 Issued: 7,440,518 shares at December 31, 2011 and 2010 Outstanding: 6,875,001 and 6,865,150 shares at December 31, 2011 and 2010, respectively Common Stock, Value, Issued, Total Paid-in capital Paid-in capital Additional Paid in Capital, Ending Balance Additional Paid in Capital, Beginning Balance Paid-in capital Retained earnings Retained earnings Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Retained earnings Accumulated Other Comprehensive Income Loss Net Of Tax Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance Accumulated other comprehensive income Accumulated other comprehensive income Stockholders' Equity before Treasury Stock Stockholders' Equity before Treasury Stock Treasury stock, at cost Treasury stock, at cost Treasury stock, at cost Treasury Stock, Value, Ending Balance Treasury Stock, Value, Beginning Balance Treasury stock, at cost, 565,517 and 575,368 shares at December 31, 2011 and 2010, respectively Treasury stock, at cost Total stockholders' equity Total stockholders' equity Stockholders' Equity Attributable to Parent, Ending Balance Stockholders' Equity Attributable to Parent, Beginning Balance Total stockholders' equity Liabilities and Stockholders' Equity, Total Total liabilities and stockholders' equity Liabilities and Stockholders' Equity, Total Common stock, par value Common stock, shares authorized Common stock, shares issued Common Stock, Shares, Issued, Total Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding, Ending Balance Common Stock, Shares, Outstanding, Beginning Balance Common stock, shares outstanding Common stock, shares outstanding Treasury Stock, Shares Treasury Stock, Shares, Ending Balance Treasury Stock, Shares, Beginning Balance Treasury stock, at cost Consolidated Statements Of Earnings [Abstract] Net sales Sales Revenue, Net, Total Cost of sales Cost of Goods and Services Sold, Total Gross Profit Gross profit Selling and general expenses Selling, General and Administrative Expense, Total Operating Income (Loss) Operating profit Other Nonoperating Income (Expense) Other income, principally interest Other Nonoperating Income (Expense), Total Earnings before provision for income taxes Earnings before provision for income taxes Income tax provision Provision for income taxes Income Tax Expense (Benefit), Total Net Income (Loss) Attributable to Parent Net earnings Net earnings Weighted average shares outstanding: Weighted average common shares outstanding: Weighted Average Number Of Shares Outstanding Basic Basic Weighted Average Number of Shares Outstanding, Basic, Total Weighted Average Number Of Diluted Shares Outstanding Diluted Weighted Average Number of Shares Outstanding, Diluted, Total Net Earnings Per Share [Abstract] Net earnings per share: Basic Earnings Per Share, Basic, Total Diluted Earnings Per Share, Diluted, Total Consolidated Statements Of Cash Flows [Abstract] Cash flows from operating activities: Adjustments to reconcile net earnings to net Cash provided by (used in) operating activities: Adjustments to reconcile net earnings to net cash provided by (used in) operating activities: Provision for depreciation Depreciation, Total Deferred Income Tax Expense (Benefit) Deferred income taxes Deferred Income Tax Expense (Benefit), Total Other Other Other Noncash Income (Expense), Total Changes in: Changes in operating accounts: Accounts receivable Accounts receivable, net Accounts receivable, net Inventories Inventories Increase (Decrease) in Inventories, Total Other current assets Other current assets Increase (Decrease) in Other Operating Assets, Total Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities, Total Increase (Decrease) in Accrued Income Taxes Payable Federal and state income taxes Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Cash flows from investing activities: Marketable securities purchased Marketable securities purchased Payments to Acquire Marketable Securities, Total Proceeds from Sale of Available-for-sale Securities, Debt Marketable securities - maturities and sales Acquisition of property, plant and equipment Acquisition of property, plant and equipment Payments to Acquire Property, Plant, and Equipment, Total Sale of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment, Total Payments to Acquire Businesses, Net of Cash Acquired Acquisition of businesses, net of cash acquired Acquisition of businesses, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired, Total Payments for (Proceeds from) Other Investing Activities Other Other Net Cash Provided by (Used in) Investing Activities Net cash provided by (used in) investing activities Cash flows from financing activities: Dividends paid Dividends paid Payments of Dividends, Total Proceeds From Payments For Other Financing Activities Other Net Cash Provided by (Used in) Financing Activities Net cash used in financing activities Cash and Cash Equivalents, Period Increase (Decrease) Net increase in cash and cash equivalents Supplemental Cash Flow Information [Abstract] Supplemental disclosures of cash flow information: Income Taxes Paid Cash paid during the year for: Income taxes Consolidated Statements Of Stockholders' Equity [Abstract] Statement, Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Parent [Member] Parent [Member] Common Stock [Member] Common Stock [Member] Additional Paid In Capital [Member] Paid-In Capital [Member] Retained Earnings [Member] Retained Earnings [Member] Comprehensive Income [Member] Accumulated Comprehensive Income (Loss) [Member] Treasury Stock [Member] Treasury Stock [Member] Common Stockholders' Equity Balance Balance Common Stockholders' Equity Shares, Outstanding Balance, shares Balance, shares Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Unrealized gain/loss on available-for-sale securities, net of tax Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total comprehensive income Dividends, Common Stock Dividends paid Dividends paid Dividends, Common Stock, Total Stockholders' Equity, Other Other Stockholders' Equity, Other Shares Other, shares Common Stock, Dividends, Per Share, Cash Paid Dividends paid, per share Summary Of Significant Accounting Policies [Abstract] Significant Accounting Policies [Text Block] Summary Of Significant Accounting Policies Inventories [Abstract] Inventory Disclosure [Text Block] Inventories Accrued Liabilities [Abstract] Accounts Payable and Accrued Liabilities Disclosure [Text Block] Accrued Liabilities Treasury Stock [Abstract] Treasury Stock [Text Block] Treasury Stock Earnings Per Share Text Block Net Earnings Per Share Share-Based Compensation [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation Retirement Plans [Abstract] Pension And Other Postretirement Benefits Disclosure Text Block Retirement Plans Income Taxes [Abstract] Income Tax Disclosure [Text Block] Income Taxes Commitments And Contingencies [Abstract] Commitments And Contingencies Disclosure Text Block Commitments And Contingencies Concentrations. Concentrations [Abstract] Concentration Risk Disclosure [Text Block] Concentrations Environmental [Abstract] Environmental Loss Contingency Disclosure [Text Block] Environmental Business Segments [Abstract] Segment Reporting Disclosure Text Block Business Segments Operating Leases [Abstract] Operating Leases of Lessee Disclosure [Table Text Block] Operating Leases Interim Financial Information [Abstract] Quarterly Financial Information [Text Block] Interim Financial Information Line Of Credit And Commercial Letters Of Credit [Abstract] Short-term Debt [Text Block] Line Of Credit And Commercial Letters Of Credit Business Acquisition [Abstract] Business Combination Disclosure [Text Block] Business Acquisition Other. Other [Abstract] Other. Other [Text Block] Other Subsequent Event [Abstract] Subsequent Events [Text Block] Subsequent Event Schedule II - Valuation And Qualifying Accounts [Abstract] Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Schedule II - Valuation And Qualifying Accounts